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Journal articles on the topic 'Raft and pile foundation'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Sharma, V. J., S. A. Vasanvala, and C. H. Solanki. "Behaviour of Load-Bearing Components of a Cushioned Composite Piled Raft Foundation Under Axial Loading." Slovak Journal of Civil Engineering 22, no. 4 (2014): 25–34. http://dx.doi.org/10.2478/sjce-2014-0020.

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Abstract In the last decade piled raft foundations have been widely used around the world as intermediate foundation systems between piles and rafts to control the settlement of foundations. However, when those piles are structurally connected to rafts, relatively high axial stresses develop in relatively small numbers of piles, which are often designed to fully mobilize their geotechnical capacities. To avoid a concentration of stress at the head of piles in a traditional piled raft foundation, the raft is disconnected from the piles, and a cushion is introduced between them. Also, to tackle

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Gunawan, H., L. Flessati, and P. Marveggio. "Optimizing foundation performance: the impact of raft on piled raft foundation in sand." Géotechnique Letters 15, no. 2 (2025): 1–5. https://doi.org/10.1680/jgele.24.00136.

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Conventional piled foundation designs tend to be overly conservative since the beneficial role of the raft is often neglected by assuming the piles to be the only part of the structure interacting with the soil. The contribution of the raft to the global response of the foundation is particularly important in the case of “large” piled rafts, where the pile length is comparable to the raft width. This configuration, although not theoretically optimal, is common for existing foundations of bridges and high-rise buildings. Although the beneficial effect of raft–pile–soil interaction on both beari

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Dhage, Amit, and S. S. Solanke. "Comparative Analysis of Raft, Pile & Piled Raft Foundation using Designing Software." IOP Conference Series: Earth and Environmental Science 1193, no. 1 (2023): 012006. http://dx.doi.org/10.1088/1755-1315/1193/1/012006.

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Abstract Raft foundations are essentially a slab that extends the entire length of the building, sustaining and dispersing its mass to the earth. A pile foundation is a collection of columns that are erected or inserted into the ground to distribute weight to the subsoil underneath. A pile is a long, cylindrical construction made made of a sturdy substance such as concrete. Building loads are transferred to hard strata, rocks, or high-bearing-capacity soil using piles. Pinned raft foundations are a combination of a pile and a raft slab. They’re frequently used for large structures and when the

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Rahman, Arief, Ferry Fatnanta, and Syawal Satibi. "Analysis of the capability of pile assembly foundations in soft soil in physical modeling of variationsiin laboratory scale distances." astonjadro 12, no. 1 (2023): 136. http://dx.doi.org/10.32832/astonjadro.v12i1.8139.

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<p>The capacity of raft foundations, pile foundations and pile rafts on soft soil with variations in the distance between the piles. Perform analysis of the carrying capacity and settlement of each foundation test and then compare the results of the theoretical carrying capacity research with the analysis of carrying capacity calculations. The implementation of the test prepares the test along with samples of the raft foundation, pile foundation and pile raft foundation. The test were carried out using a gradual load then a dial gauge is placed at both ends of the sample raft and the loa

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Al-Mosawi, Mosa J., Mohammed Y. Fattah, and Abbas A. O. Al-Zayadi. "EXPERIMENTAL OBSERVATIONS ON THE BEHAVIOR OF A PILED RAFT FOUNDATION." Journal of Engineering 17, no. 04 (2011): 807–28. http://dx.doi.org/10.31026/j.eng.2011.04.13.

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The piled raft is a geotechnical composite construction consisting of three elements: piles, raft and soil.In the design of piled rafts, the load shared between the piles and the raft, and the piles are used up to aload level that can be of the same order of magnitude as the bearing capacity of a comparable singlepile or even greater. Therefore, the piled raft foundation allows reduction of settlements in a veryeconomic way as compared to traditional foundation concepts.This paper presents experimental study to investigate the behavior of piled raft system in sandysoil. A small scale “prototyp

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Melese, Fekadu. "Improved Performance of Raft Foundation Using Detached Pile Columns in Loose Subsoil Conditions." Advances in Civil Engineering 2022 (March 8, 2022): 1–18. http://dx.doi.org/10.1155/2022/4002545.

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Piles act as settlement reducers in case of connected piled-raft foundation and hence decrease the settlements of the raft. The design concept of the connected piled-raft foundations is to lessen the number of piles and utilize the bearing capacity of the system piled raft. Due to significant straining actions at the pile head-raft connection, an alternative technique is proposed to disconnect the piles from the raft. A granular layer (cushion) beneath the raft is incorporated. The disconnection has a beneficial effect on reducing axial load compared to connected piles. For small piled rafts,

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Kannaujiya, Pratish, and Vijay Kumar Srivastava. "Behavior of Different Configuration of Piled Raft Foundation for a High-Rise Building by using FEM." IOP Conference Series: Materials Science and Engineering 1236, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1757-899x/1236/1/012006.

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Abstract In this paper, the numerical simulation is performed on two piled raft configurations having uniform loading on a piled raft foundation. To investigate the interaction between various parameters of pile soil foundation with varying components of its length of pile, diameter and raft thickness. These components are critical for increasing the foundation’s bearing capacity. It’s important aspect to achieve a reliable design to optimize piled raft foundations subjected to uniformed load- settlement behaviors of the curves. These load – settlements are basically depending on the changing

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Alhassani, Athraa Mohammed Jawad, and Ala Nasir Aljorany. "Parametric Study on Unconnected Piled Raft Foundation Using Numerical Modelling." Journal of Engineering 26, no. 5 (2020): 156–71. http://dx.doi.org/10.31026/j.eng.2020.05.11.

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Piled raft is commonly used as foundation for high rise buildings. The design concept of piled raft foundation is to minimize the number of piles, and to utilize the entire bearing capacity. High axial stresses are therefore, concentrated at the region of connection between the piles and raft. Recently, an alternative technique is proposed to disconnect the piles from the raft in a so called unconnected piled raft (UCPR) foundation, in which a compacted soil layer (cushion) beneath the raft, is usually introduced. The piles of the new system are considered as reinforcement members for the subs

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Chore, Hemant, Junaid Siddiqui, and Ashish Kishore. "Parametric Investigations into the Analysis of Piled Raft for Multi-Storeyed Building." Journal of Civil Engineering Frontiers 3, no. 02 (2023): 67–73. http://dx.doi.org/10.38094/jocef30260.

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This paper presents the analysis of the piled raft for a 50-story building using an approximate method to estimate the settlement and load distribution of the foundation. The pile and soils are considered to be interacting springs, and the raft is represented as a thin plate. The model takes into account both the resistance of the piles and the resistance of the raft foundation. It is calculated how the raft, soil, and pile interact. The suggested technique enables the use of the finite element based program ETABS to quickly address the issues of small, non-uniformly arranged rafts and big, no

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Bralović, Nemanja, Iva Despotović, and Danijel Kukaras. "Experimental Analysis of the Behaviour of Piled Raft Foundations in Loose Sand." Applied Sciences 13, no. 1 (2022): 546. http://dx.doi.org/10.3390/app13010546.

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This paper presents the experimental analysis that was conducted on small-scale 1g physical models of piled raft foundation structures with a group of 2 × 2 piles in loose sand. The purpose of the piles was to reduce the settlement of the raft. The test program included twelve experiments, three of which were conducted on a raft alone and nine on piled rafts at pile distances of 3d, 4d, and 5d and pile lengths of 10d, 20d, and 40d, where d is pile diameter. The test results show that the current conventional approach to design of piled raft foundations, at a high safety load factor in piles th

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Han, Ai Hong, and Hui Jun Zheng. "Elasto-Plastic Design of Piled Raft Foundation." Advanced Materials Research 446-449 (January 2012): 588–91. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.588.

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When the loading sustained by the foundation is large, employing piled raft foundation is one of the best solutions. In the elasto-plastic design of piled raft, piles could improve the differential settlement and reduce raft thickness. As the raft sustains high earth and water pressures, by reducing the span length of raft and excavation depth, one can get economic design. Using elasto-plastic property of the pile is a better method to avoid increasing the pile length and pile diameter and making full capacity of the piled raft foundation in design compared to normal piled raft. With adoption

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Samirsinh, P. Parmar. "A Review on Piled- Raft Foundation analysis methods and Recommendations in Research." Research and Review: Journal of Structural and Building Construction 1, no. 1 (2025): 1–20. https://doi.org/10.5281/zenodo.14807735.

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<em>Piled raft foundations have gained significant popularity in recent years due to their ability to enhance bearing capacity, minimize settlement, and mitigate differential deflection. This foundation system efficiently distributes structural loads, with the raft directly transferring part of the load to the soil while the piles contribute through skin friction. Compared to conventional pile foundations, piled raft foundations offer economic advantages by allowing pile termination at higher elevations without penetrating the full depth of weak soil layers. However, they exhibit more settleme

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Omer, Joshua, and Hasan Haroglu. "Tests on Model Piled Rafts in Sand: Measured Settlements Compared with Finite Element Predictions." Geotechnical and Geological Engineering 39, no. 4 (2021): 3271–83. http://dx.doi.org/10.1007/s10706-020-01664-0.

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AbstractLaboratory tests were carried out on non-piled rafts, single piles, surface contacting and non surface-contacting piled rafts which were made of aluminum and instrumented with strain gauges and deflection gauges. The foundations were installed in dry sand contained in a large metal tank to minimize boundary effects. Maintained loads were applied to each foundation until failure was closely approached. In parallel, analyses were performed using PLAXIS™ 3-D finite element program to compare the calculated and measured load-settlement trends hence assess the influence of soil stiffness on

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T, Aruna, K. V. S. B. Raju, and Swathi Gowda. "Experimental Investigation of piled raft foundation on Cohesionless Soil." International Journal of Research and Scientific Innovation 09, no. 02 (2022): 113–18. http://dx.doi.org/10.51244/ijrsi.2022.9207.

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The combination of piles and raft foundation is known as piled raft foundation. Piled raft foundations have proven to be more cost-effective and capable of meeting safe bearing capacity and serviceability norms in the case of high-rise buildings on cohesionless soil. The behavior of a stacked raft foundation is influenced by the piles, raft, and soil. The stacked raft system’s bearing capacity is improved and settlement is minimized when the ground beneath the raft foundation bears the burden of supporting the applied loads. The piled raft foundation minimizes total settlement and improves bea

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Ahmed, Huda Hussein, and Salah Rohaima Al-Zaidee. "Experimental Investigation for Effects of Mini-piles on the Structural Response of Raft Foundations." Civil Engineering Journal 5, no. 5 (2019): 1084–98. http://dx.doi.org/10.28991/cej-2019-03091313.

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Mini-piles made their debut as a cost-effective way to stabilize the historical structures. Recently, mini-piles have increased in popularity all over the world and are being used for bridges, buildings, slope stability, antenna towers, and residential construction. This paper presents the preparing, executing, data acquisition, and result presentation for an experimental work concerns with five scale-down mini-piled raft foundation models. All models were prepared to study the effectiveness of the mini-piled raft foundation in reducing the settlement and the bending moments. Five tests have b

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Ahmed, Danish, Siti Noor Linda Bt Taib, Tahar Ayadat, and Alsidqi Hasan. "Numerical Analysis of the Carrying Capacity of a Piled Raft Foundation in Soft Clayey Soils." Civil Engineering Journal 8, no. 4 (2022): 622–36. http://dx.doi.org/10.28991/cej-2022-08-04-01.

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Piled raft foundations are a common type of foundation for high-rise buildings. Unlike shallow foundations, deep foundations (piles) pass through weak or soft soil deposits and can reach stiff soil or bedrock to support the weight of the structure. In this paper, the performance of a medium embedment depth piled raft foundation in soft soil is presented. A numerical model was developed and a parametric study was conducted in order to simulate the case of such a foundation system and to investigate its performance in soft clay. This parametric study investigated the effect of the geometry of a

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de Freitas Neto, Osvaldo, Renato P. Cunha, Olavo Francisco Santos, Paulo J. R. Albuquerque, and Jean R. Garcia. "Comparison of Numerical Methods for Piled Raft Foundations." Advanced Materials Research 838-841 (November 2013): 334–41. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.334.

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The methodologies used to calculate piled raft foundations are normally more complex than conventional foundations due to the large number of variables involved in the problem. In the conventional block, the interaction variables considered are only between the pile and the soil. In the piled raft, all the interaction effects must be considered, as follows: plate-soil, plate-piles and piles-soil, simultaneously. The Finite Element Method (FEM) has proven to be a useful tool in analyzing these types of problems. This study aims at assessing the behavior of piled rafts using the Cesar-LCPC numer

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Huang, Yuan, Xin Jian Feng, Jian Lin Zhang, and Shu Zhi Lin. "Working Mechanism of Two-Phase Varying Stiffness Piled Raft Foundation." Applied Mechanics and Materials 590 (June 2014): 326–30. http://dx.doi.org/10.4028/www.scientific.net/amm.590.326.

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In this paper, the FEM software ABAQUS is used to analysis the pile-soil load share ratios, load share value of pile side friction and tip resistance for three bases, including natural raft foundation, conventional piled raft foundation and two-phase varying stiffness piled raft foundation. Furthermore, the deformation and settlement of deformation-coordinating device are studied as well. Based on the research of the working characteristic of piles and soil, it highlights the good working mechanism of two-phase varying stiffness piled raft foundation. The analysis results show that two-phase v

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Janda, Tomás, Renato P. Cunha, Pavel Kuklík, and Gérson M. Anjos. "Three Dimensional Finite Element Analysis and Back-analysis of CFA Standard Pile Groups and Piled Rafts Founded on Tropical Soil." Soils and Rocks 32, no. 1 (2009): 3–18. http://dx.doi.org/10.28927/sr.321003.

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This paper deals with Plaxis 3D finite element simulations of the mechanical response of deep foundations founded in a collapsible tropical soil. Main attention is initially paid to differences between single continuous flight auger (CFA) pile behavior and the behavior of CFA piles in standard groups. The numerically computed load-settlement curves are compared to field load test data obtained at the experimental research site of the University of Brasília (UnB), leading to conclusions about the appropriateness of adopting laboratory, in situ or back calculated parameters as input of numerical

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Kripak, Volodymyr, Vira Koliakova, and Daniiil Kuzmenko. "Efficiency of the combined pile-raft foundation." Building constructions. Theory and Practice, no. 16 (June 28, 2025): 123–34. https://doi.org/10.32347/2522-4182.16.2025.123-134.

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It is well known that a raft foundation is, in most cases, a more economical alternative to a conventional pile foundation. The concept of incorporating a raft into a piled system is not new and has been implemented in foundation design in several Western countries. However, the practical implementation of this concept remains limited and largely absent. Ukrainian design codes only mention the existence of combined pile-raft foundations (CPRFs) and the possibility of their application. In CPRFs, both components—the raft and the piles—act as load-bearing elements, and their design must follow o

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Ali, Kiramat, Saleem Ullah, Haseen Nawaz, Mohsin Ahmad, Muhammad Safdar, and Wali Ullah. "Experimental Modelling of Helical Piles under Axial Loading." Pakistan Journal of Engineering and Technology 5, no. 2 (2022): 128–32. http://dx.doi.org/10.51846/vol5iss2pp128-132.

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 Due to the rapid increase in population, the demand for high-rise buildings is also increasing daily. Researchers have performed various numerical and experimental studies to find out the best foundation type for structure. A helical foundation is one of the most suitable foundation types to be incorporated in the construction of high-rise buildings. In a helical pile, some fraction of axial load is taken by the helix, which increases the load-carrying capacity of the foundation. This study is carried out to determine the settlement and load carrying capacity of the helical pile and hel

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Jamil, Irfan, Irshad Ahmad, Wali Ullah, Mahmood Ahmad, Mohanad Muayad Sabri Sabri, and Ali Majdi. "Experimental Study on Lateral and Vertical Capacity of Piled Raft and Pile Group System in Sandy Soil." Applied Sciences 12, no. 17 (2022): 8853. http://dx.doi.org/10.3390/app12178853.

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In deep foundations, the pile group and the pile raft are generally used. To date, the contribution of the raft is not taken into account in the design, even when the raft is in contact with the soil and the whole system is therefore considered to work as a pile group foundation. In a combined pile raft system, the raft takes a considerable portion of the applied load, depending upon the number of piles, the spacing to diameter ratio of the piles, and the length to diameter ratio. In this paper, an experimental investigation is carried out to study the response of small-scale pile group and pi

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Cunha, Renato P., and Miguel Pando. "Influence of Pile-Soil-Raft Parameters on the Behavior of Piled Raft and Conventional Piled Group Foundations." Soils and Rocks 36, no. 1 (2013): 21–35. http://dx.doi.org/10.28927/sr.361021.

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In the Central Area of Brazil, particularly in the city of Goiânia (and in limited cases of the Brazilian capital Brasília), it is becoming common to observe in few foundation projects the design of a single, thick and large raft, supported by several piles, particularly for the central highly loaded and slender part of very tall buildings. In fact, many of these piles are designed as “settlement reducer” ones, behaving as “floating piles” with distinct geometries or relative pile stiffness (pile-soil) ratios. They are defined with basis on some rationalized procedure adopted to minimize the d

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Anggraini, Nita, and Fitriana Sarifah. "The Influence of Raft Thickness on Settlement and Bending Moment of Pile Raft Foundation in Clay Soil." CIVED 11, no. 2 (2024): 614–24. http://dx.doi.org/10.24036/cived.v11i2.584.

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Geotechnical engineers often deal with shallow foundation designs to support relatively simple building structures. However, as the demand for construction grows over time, there is a need for larger and more complex building structures. This is closely related to the weight of the building that will be supported by the foundation as a substructure. Therefore, the development of knowledge about other types of foundations to support the structural loads above them is highly necessary. Pile foundations are a fairly good solution for supporting larger structural loads that cause significant settl

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Darjanto, Helmy. "FLOATING RAFT-PILE FOUNDATIONS ANALYSIS USING NUMERICAL SIMULATION." Jurnal Rekayasa Sipil (JRS-Unand) 7, no. 2 (2011): 40. http://dx.doi.org/10.25077/jrs.7.2.40-46.2011.

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The numerical simulation of raft-pile foundations subjected to vertical load is presented in this paper. For comparison study, numerical models of single raft and pile groups are completed. The numerical models are adopting the elastic constitutive law for the materials. The stresses and vertical displacement of the models are observed. The behaviour of the raft-pile foundation compared to the pile-group is then investigated. The results using the same external load show that the raft-pile foundation has smallest displacement compared to the others. In terms of stresses, the raft s

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Zhong, Zhibin, Xiaotong He, Shangheng Huang, et al. "The Influence of Soft Soil, Pile–Raft Foundation and Bamboo on the Bearing Characteristics of Reinforced Concrete (RC) Structure." Buildings 15, no. 13 (2025): 2302. https://doi.org/10.3390/buildings15132302.

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Pile–raft foundations are widely used in soft soil engineering due to their good integrity and high stiffness. However, traditional design methods independently design pile–raft foundations and superstructures, ignoring their interaction. This leads to significant deviations from actual conditions when the superstructure height increases, resulting in excessive costs and adverse effects on building stability. This study experimentally investigates the interaction characteristics of pile–raft foundations and superstructures in soft soil under different working conditions using a 1:10 geometric

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Xie, Yunfei, and Shichun Chi. "Optimization Method for Irregular Piled Raft Foundation on Layered Soil Media." Advances in Civil Engineering 2019 (May 20, 2019): 1–15. http://dx.doi.org/10.1155/2019/5713492.

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Important buildings such as nuclear power plants always require stricter control of differential settlement than ordinary buildings. Therefore, it is necessary to provide an optimized design for the piled raft foundations of important buildings. In this paper, a new optimization method (using different pile diameters and different pile spacing) was proposed for the design of piled raft foundations. This method adjusts the pile diameters and pile spacing according to the stress distribution at the pile top of the initial design to achieve a more uniform settlement of the raft and stress distrib

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Vu, Anhtuan, Ducphong Pham, Tuonglai Nguyen, and Yu He. "3D Finite Element Analysis on Behaviour of Piled Raft Foundations." Applied Mechanics and Materials 580-583 (July 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.3.

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This paper highlights settlement behaviour of piled raft foundation by 3D finite element analysis through Plaxis 3D Foundation program. The effects of pile number, pile length, pile layout and pile spacing on the behaviour of piled raft foundation were studied. The numerical results show that: Piled raft foundation has much more efficency to reduce settlement than that of traditional raft foundation. The value of vertical defomation decreases as the result of the increase of pile number, pile length, pile spacing and vice versa. Pile layout has significant effect on both value and location of

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Merin Jose, K., Divya Krishnan, and P. T. Ravichandran. "Behaviour of Vertically Loaded Piled Raft System." Journal of Computational and Theoretical Nanoscience 17, no. 5 (2020): 2383–87. http://dx.doi.org/10.1166/jctn.2020.8900.

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A foundation gives the overall strength to a building by providing a level surface for the building to stand and distributing the total load uniformly to the underlying soil. The type of foundation to be chosen varies with the foundation soil and site conditions. Piled raft system are a type of foundation preferred when the bearing strata has less soil bearing capacity and a huge load has to be transferred. Thus Piled raft foundation is a foundation system which uses the combined effects of both rafts and piles such that it is expected to transfer huge loads without large settlement. An ample

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Harpito, Harpito, Abdul Hakam, and Rina Yuliet. "STUDI ANALISIS PERILAKURAFT-PILED FOUNDATION BERDASARKAN METODA ELEMEN HINGGA 3D NONLINIER." Jurnal Rekayasa Sipil (JRS-Unand) 11, no. 1 (2015): 1. http://dx.doi.org/10.25077/jrs.11.1.1-10.2015.

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Simulasi numerik dengan menggunakan metoda elemen hingga 3D non linier SAP2000 pada raft-piled foundation yang dibebani secara vertikal disajikan dalam makalah ini. Untuk studi perbandingan, model numerik raft foundation dan group pile foundation sudah di teliti sebelumnya. Model numerik yang mengadopsi hukum konstitutif elastis non linier untuk bahan. Beban dan perpindahan vertikal dari model yang diamati. Perilaku raft-piled foundation dibandingkan dengan group pile foundation ini kemudian diselidiki. Hasil dengan menggunakan beban eksternal yang sama menunjukkan bahwa raft-piled foundation

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Park, Donggyu, and Junhwan Lee. "Interaction effects on load-carrying behavior of piled rafts embedded in clay from centrifuge tests." Canadian Geotechnical Journal 52, no. 10 (2015): 1550–61. http://dx.doi.org/10.1139/cgj-2014-0336.

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In the present study, various interaction effects and load-carrying behavior of piled rafts embedded in clay were investigated. For this purpose, a series of centrifuge load tests were conducted using different types of model foundations, including single pile, group piles, piled raft, and unpiled raft. Different clay conditions were considered to prepare for centrifuge specimens. It was found that the pile group effect in clays is significant within initial loading range, showing lower load-carrying capacity. As settlement increases, the pile group effect becomes less pronounced. For both sof

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Yunus, Muhammad, and Risman Firman. "Bearing Capacity and Deformation of Timber Pile-Raft Foundation on Soft Soil Deposits." EPI International Journal of Engineering 7, no. 2 (2025): 68–74. https://doi.org/10.25042/epi-ije.082024.04.

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A pile-raft foundation is a type of foundation that combines two different types of foundations, a raft base and a pile foundation. These raft bases are one of the most practical economic solutions for buildings because both the support capacity of the raft and the support capability of the pile both work. The paper presents results of the test bearing capacity of piled-raft foundations made from timber in the laboratory and analyzes numerically the deformations that occur in piled raft foundations made of timber. The results of the loading test on the Bakau piled raft foundations in the labor

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Sun, Yan, and Man Yang. "The Analysis of Long Pile for Piled Raft Foundation Reinforcement." Advanced Materials Research 1065-1069 (December 2014): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.223.

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For high-rise buildings piled raft foundation reinforcement, use ANSYS to establish the piled raft foundation complement pile reinforcement model which is called long-short-piled raft foundation. Parameters of complement pile respectively from the aspects of pile length and pile diameter for change, study its effect on piled raft foundation vertical bearing performance. Provide certain reference value for practical engineering.

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Ojha, Devesh. "Numerical Analysis of Piled Raft Foundations in Alluvial soil." Journal of Mechanical and Construction Engineering (JMCE) 3, no. 2 (2023): 1–11. http://dx.doi.org/10.54060/jmce.v3i2.25.

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In this age of rapid urbanization, population is rapidly increasing in urban area, therefore a new concept of vertical cities has been introduced in form of high-rise building, and there are many conventional methods for design of foundation systems for high rise buildings. In most of the conventional methods pile foundations have been given preference for high rise buildings, all the loads of the building are transferred to the soil by piles. Some of the pressure of the building can also be transfer by raft directly to the soil by contact pressure which is neglected in most of the conventiona

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Leal, Felipe Carlos de Araújo, Osvaldo Freitas Neto, Wilson Cartaxo Soares, Roberto Quental Coutinho, and Renato Pinto Cunha. "Numerical analysis of the behavior of piled rafts and pile groups in the presence of pile defects." Soils and Rocks 48, no. 2 (2025): e2025001124. https://doi.org/10.28927/sr.2025.001124.

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This article aims to evaluate the behavior of piled rafts and pile groups subject to the presence of defective piles. To simulate the defect, it was considered that a foundation pile is shorter than projected. Seven static load tests performed in 2011 in the city of João Pessoa, in north-east Brazil, were used as the basis of analysis. These load tests were performed on an isolated raft, in 3 piled rafts and in 3 pile groups. In this study, the ELPLA® software, based on a hyperbolic iterative model, was used. Initially, modeling was performed for the original situations with intact foundations

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Xie, Xin Yu, Ming Xin Shou, Jie Qing Huang, and Kai Fu Liu. "Application Study of Long-Short-Piled Raft Foundation." Applied Mechanics and Materials 170-173 (May 2012): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.242.

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The long-short-piled raft foundation is an unusual type of building base. This kind of foundation is usually applied for pile foundation reinforcement of existing buildings when shortage of bearing capacity of piles occurs. The bearing capacity of pile foundation is improved and less settlement is expected. Since this method has so many obvious advantages, it is recommended in the reinforcement design of piled raft foundation of an existing building in Tianjin. Longer reinforced concrete bored piles are adopted as the supplementary ones. The bearing capacity of this kind of piled raft foundati

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Ahmed, Danish, Siti Noor Linda Bt Taib, Tahar Ayadat, and Alsidqi Hasan. "A Review on the Behaviour of Combined Stone Columns and Pile Foundations in Soft Soils when Placed under Rigid Raft Foundation." ASM Science Journal 16 (July 15, 2021): 1–8. http://dx.doi.org/10.32802/asmscj.2021.709.

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In the last few decades, it has been observed that raft foundations are very commonly used as a foundation solution for moderate to high rise structures either by resting on stone columns or on piles in soft soils. It is believed that, combining stone columns and piles in one foundation system is the more suitable foundation for medium rise structures. The combined foundation system provides a superior and more economical alternative to pile, and a more attractive alternative to stone columns in respect to ground improvement. This paper presents the review of existing studies reported in the l

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Mahalakshmi, M., B. Soundara, and C. D. Hashini. "Numerical Simulation of Combined Pile-Raft Foundation under Horizontal Loading." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 3 (2021): 448–52. https://doi.org/10.35940/ijeat.C4758.029320.

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Raft foundations generally have the ability to reduce differential settlement, contrarily causing excessive settlement. In order to overcome this, piles are used along with the raft termed as combined pile-raft foundation system. Due to the lack of availability of simplified tools and intricacy of work, the combined pile raft foundation remains as an untouched area in research. This paper explores the performance of 2x2 numerically simulated combined pile-raft foundation embedded in sand exposed to pure horizontal load using ABAQUS 3D. The effect of horizontal loading in terms of displacement

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M S, Padmanaban, and J. Sreerambabu. "Issues on Design of Piled Raft Foundation." JOURNAL OF ADVANCES IN CHEMISTRY 14, no. 1 (2018): 6057–61. http://dx.doi.org/10.24297/jac.v14i1.5905.

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A piled raft foundation consists of a thick concrete slab reinforced with steel which covers the entire contact area of the structure, in which the raft is supported by a group of piles or a number of individual piles. Bending moment on raft, differential and average settlement, pile and raft geometries are the influencing parameters of the piled raft foundation system. In this paper, a detailed review has been carried out on the issues on the raft foundation design. Also, the existing design procedure was explained.

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Febriansya, Aditia, Iskandar Iskandar, Agus Suyono, Nida Amalia Sholehah, and Nisa Handayani. "Analisis Kebutuhan Kapasitas Fondasi Piled Raft Studi Kasus Pegadaian Tower, Jakarta Pusat." RekaRacana: Jurnal Teknil Sipil 8, no. 3 (2023): 165. http://dx.doi.org/10.26760/rekaracana.v8i3.165.

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ABSTRAKPada artikel ini akan dibahas analisis kapasitas fondasi rakit dengan tambahan fondasi tiang (piled raft) pada Pegadaian Tower, Jakarta Pusat. Analisis dilakukan berdasarkan SNI 8460:2017 yaitu fondasi harus memenuhi persyaratan kekuatan terhadap gaya vertikal maupun horizontal dengan faktor keamanan yang mencukupi. Berdasarkan hasil penyelidikan tanah, Pegadaian Tower berada di atas lapisan tanah lunak hingga kedalaman 20 meter, terdapat lapisan lensa tanah, dan tidak ditemukan lapisan tanah keras dengan N > 60 hingga kedalaman 80 meter, sehingga dipilih jenis fondasi piled raft. Me

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Yirsaw, Getasew Mare, and Argaw Asha Ashango. "Numerical Study on Optimization of Piled Raft Foundation on Stratified Soil under Static Load." Advances in Civil Engineering 2023 (October 30, 2023): 1–11. http://dx.doi.org/10.1155/2023/4732353.

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Piled raft foundation (PRF) is a combination of pile and raft that provides adequate bearing capacity under the allowable settlement. This research aims to optimize the PRF design for a 48-story Commercial Bank headquarters building in Addis Ababa, Ethiopia, by conducting parametric study on various pile configuration using FLAC3D (Fast Lagrangian Analysis of Continua in three Dimensions) software. We analyzed 28 piled raft configurations and found that increasing the distance between piles increases the raft load sharing distribution by 11.5% while reducing settlement. Despite variations in p

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Al-Damluji, Omar al-Farouk Salem, and Nadher Hassan Al-Baghdadi. "ANALYSIS OF PILED-RAFT FOUNDATION BY THE FINITE ELEMENT METHOD." Kufa Journal of Engineering 3, no. 2 (2014): 115–32. http://dx.doi.org/10.30572/2018/kje/321264.

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The piled raft is a geotechnical composite construction consisting of three elements: piles,raft and soil. It is suitable as a foundation for large buildings. This paper presents an analysis of piled raft foundation, included material nonlinearity and soil structure interaction. An efficient computer program in FORTRAN 9Ois developed for this analysis. A 20 node disoparametric brick element has been used to model pile, raft, soil and interface materials. Thin layer interface element has been used to model the contact zone between the pile and soil, and between raft and soil. The behavior of th

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Oh, Dong-Wook, Suk-Min Kong, Yong-Joo Lee, and Heon-Joon Park. "Prediction of Change Rate of Settlement for Piled Raft Due to Adjacent Tunneling Using Machine Learning." Applied Sciences 11, no. 13 (2021): 6009. http://dx.doi.org/10.3390/app11136009.

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For tunneling in urban areas, understanding the interaction and behavior of tunnels and the foundation of adjacent structures is very important, and various studies have been conducted. Superstructures in urban areas are designed and constructed with piled rafts, which are more effective than the conventional piled foundation. However, the settlement of a piled raft induced by tunneling mostly focuses on raft settlement. In this study, therefore, raft and pile settlements were obtained through 3D numerical analysis, and the change rate of settlement along the pile length was calculated by line

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Mu, Linlong, and Maosong Huang. "Analytical Method for Evaluation of Coupled Responses of a Multidirectionally Loaded Pile-Raft Foundation Induced by Tunnelling in Layered Soils." Mathematical Problems in Engineering 2015 (2015): 1–18. http://dx.doi.org/10.1155/2015/540804.

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The tunnelling effect on a pile-raft foundation is usually studied in either the horizontal or vertical direction separately, while, in practice, the responses of a pile-raft foundation induced by tunnelling in the horizontal and vertical directions occur simultaneously. Typically, a pile-raft foundation is usually loaded by vertical and horizontal loads and moments when a tunnel is constructed. Since little effort has been conducted to evaluate the coupled responses of multidirectionally loaded pile-raft foundations subjected to tunnelling, a modified two-stage method is proposed in this pape

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Zhu, Xiao-jun, Kang Fei, and Sheng-wei Wang. "Horizontal Loading Tests on Disconnected Piled Rafts and a Simplified Method to Evaluate the Horizontal Bearing Capacity." Advances in Civil Engineering 2018 (September 16, 2018): 1–12. http://dx.doi.org/10.1155/2018/3956509.

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Disconnected piled raft (DPR) foundations have been widely adopted as an effective foundation system where the piles are separated from the raft by a granular layer, which can limit the shear forces and moments transmitted between the raft and the piles. Thus, DPR foundations may avoid the problem of horizontal forces, such as those from an earthquake or dynamic loads, which damage the structural connection between the pile head and raft. A series of static horizontal loading tests were carried out on three types of foundation models, i.e., piled raft, disconnected piled raft, and raft alone m

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Xie, Yunfei, and Shichun Chi. "Optimization Method of Reducing the Differential Settlements of Piled Raft Foundations Based on Pile-to-Pile Interaction Theory." Advances in Civil Engineering 2020 (August 10, 2020): 1–14. http://dx.doi.org/10.1155/2020/1521876.

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In order to reduce the differential settlement of piled raft foundations, an optimization method based on pile-to-pile interaction theory is proposed in this paper, which translates the problem of pile-to-pile interaction (PPI) in pile groups into that in single piles using the interaction factor method. The pile lengths were adjusted via the relationship between load, settlement, and the length of single piles during the optimization design. ANSYS software, in conjunction with nonlinear elastic soil model, is used to analyze piled raft foundation models. Two cases with different safety factor

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Kumar Malviya, Dinesh, and Manojit Samanta. "Performance of unequal piled raft under vertical loading in cohesionless medium." IOP Conference Series: Earth and Environmental Science 1336, no. 1 (2024): 012036. http://dx.doi.org/10.1088/1755-1315/1336/1/012036.

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Abstract The performance of piled rafts with unequal pile lengths in cohesionless soil under vertical loading was investigated in the present study through experimental and numerical analysis. A pattern function is used to define the pile length arrangement. The motivation for considering such a function is to ensure that the varying pile lengths follow a suitable geometric pattern, and it does not obstruct the construction practice in field applications. The piles at different locations within the raft were equipped with strain gauges to observe the strain distribution along their lengths dur

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Zhu, Rui, Feng Zhou, Zhihui Wan, et al. "Improving the Performance of Piled Raft Foundations Using Deformation Adjustors: A Case Study." Buildings 12, no. 11 (2022): 1903. http://dx.doi.org/10.3390/buildings12111903.

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Complicated soil conditions are direct difficulties for high-rise building projects. A new device called a deformation adjustor, which is used to optimize the stiffness distribution in the piled raft system, has achieved good results for this challenge. This paper presents a case study on the application of deformation adjustors to improve the performance of a piled raft foundation. This case study describes the preliminary design of pile-raft foundations with deformation adjustors, followed by numerical analysis. Based on the numerical study, the potential savings are demonstrated due to the

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Chen, Jun, Yong Hong Chang, and Yin Sheng Zou. "Nonlinear Analysis of Interaction of Superstructure-Pile-Raft-Soil System in Layered Soil — Part II: Characteristics of Reaction Force on Pile Head and Displacement of Raft." Key Engineering Materials 400-402 (October 2008): 659–66. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.659.

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Using the nonlinear analysis method and program of the interaction of superstructure- pile-raft-soil system in layered soil in the state of the previous literature, the reaction force on the pile head and the displacement characteristics of raft of the piled-raft foundation are analysed when the thickness of the raft, the spacing of the piles, the length and the diameter of the pile are changed. Some quantitative data and qualitative conclusions are obtained in this paper.

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Jogiadinata, Evelyn, Paulus Pramono Rahardjo, and Aswin Lim. "Three Dimensional Analysis of Pile-raft Foundations on Clay, Menteng-Jakarta." MEDIA KOMUNIKASI TEKNIK SIPIL 27, no. 1 (2021): 107–17. http://dx.doi.org/10.14710/mkts.v27i1.27923.

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Piled-raft foundation is a combination of pile foundation and raft foundation. Bearing capacity of piled-raft foundation yielded from contribution of both pile capacity and raft capacity. Most of the time, design of pile foundation is assumed that all load is solely carried by pile and the capacity of raft is ignored. In this study, three-dimensional finite element analysis was applied to analyze the load percentage that can be carried by raft. A case study, which is located in Central Jakarta, Indonesia, was modeled to investigate this issue. This project was instrumented with two pressure ce

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