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Journal articles on the topic 'Soft subgrade soil'

Author: Grafiati

Published: 27 July 2024

Last updated: 31 July 2025

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1

He, Jichun. "Research on factors influencing deformation of deep soft soil subgrade and control technology." Advances in Engineering Technology Research 13, no. 1 (2025): 276. https://doi.org/10.56028/aetr.13.1.276.2025.

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Deep soft soil subgrades are susceptible to environmental impacts from neighboring engineering activities, such as excavation and foundation treatment, which can lead to significant deformation and potential disasters. In response to the environmental impact of neighboring engineering construction on deep soft soil roadbeds, this article analyzes the effects and mechanisms of vacuum combined preloading and foundation pit engineering on the deformation of such subgrades, respectively, as well as the resulting pavement diseases. Subsequently, measures and techniques for controlling the environme

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2

Xu, Siyuan, Jie Liao, and Kewei Fan. "Mechanism and Application of Soilbags Filled with Excavated Soil in Soft Soil Subgrade Treatment." Applied Sciences 14, no. 5 (2024): 1806. http://dx.doi.org/10.3390/app14051806.

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This research addresses the characteristics of soft soil subgrades treated by soilbags filled with excavated clayey soil. We evaluated of the strength and deformation modulus of soilbags containing excavated soil using unconfined compression tests. In addition, the drainage consolidation characteristics of soilbag-treated subgrades were investigated via model consolidation tests. Furthermore, a practical application included the construction of a 100 m-long rural road subgrade with these soilbags. The field test and numerical simulation results included the surface settlement and pore water pr

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3

Ma, Lijie, and Ying Kong. "Application Research of CFG Piles in the Treatment of Soft Soil Foundations for High-Speed Railways." Academic Journal of Science and Technology 7, no. 1 (2023): 194–99. http://dx.doi.org/10.54097/ajst.v7i1.11368.

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In the construction of high-speed railways in our country, various complex terrains and geologies are often encountered. Therefore, the treatment of special subgrades, especially the reinforcement of soft soil subgrades, becomes extremely important. Currently, there are many methods for reinforcing weak and soft soil foundations, and during construction, appropriate and economical treatment methods should be selected based on the actual site conditions. This article intends to use the reinforcement treatment of the subgrade in the section from DK30+000 to +347.62 of the Ningbo-Hangzhou Passeng

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4

Chaudhary, Braj Kishore, and Gopal Gautam. "Cost Comparison of Flexible Pavement on Weak Sub-Grade Soil Modified with Lime and SD." SCITECH Nepal 17, no. 1 (2023): 64–71. http://dx.doi.org/10.3126/scitech.v17i1.60491.

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The effectiveness of flexible pavement is affected by the subgrade quality. The subgrade refers to a compacted layer of soil that provides sideways support to the pavement. When constructed on a weak subgrade, it negatively impacts the pavement's performance, leading to a shorter lifespan. Traditionally, the common method to stabilize a soft subgrade involves removing the weak soil and replacing it with stronger soil. However, due to the high expenses associated with soil replacement, highway agencies are exploring alternative approaches to constructing highways on soft subgrades. Soil stabili

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5

Waruwu, Aazokhi, Paulus Dwi Surya Emili Yanto, Rika Deni Susanti, and Syukurman Harefa. "Study bearing capacity of subgrade using combination bamboo grid and stabilized soil." Journal of Infrastructure Planning and Engineering (JIPE) 1, no. 2 (2022): 87–92. http://dx.doi.org/10.22225/jipe.1.2.2022.87-92.

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The subgrade of road construction also determines the strength and resistance to loads on it. The subgrade in the field very varies from soft clay to hard soil. The subgrade of soft clay requires soil improvement to increase bearing capacity. This study aims to determine the increase in bearing capacity and modulus of subgrade reaction in stabilized soil with the bamboo grid. The research was conducted through a physical model using a test box. Soft clay is compacted and the above it is replaced with stabilized soil with and without the bamboo grid. The height of stabilized soil varied from 0-

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6

Tan, Feng, and Tai Quan Zhou. "Finite Element Analysis for Subgrade Consolidation Settlement in Soft Soil." Applied Mechanics and Materials 448-453 (October 2013): 1256–59. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1256.

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The two-dimensional finite element model for subgrade consolidation settlement analysis within soft soil pile is developed using ABAQUS. The numerical simulation on a highway subgrade deformation is performed to study the variation of consolidation settlement and the excess pore water pressure distribution in the central location and the part under centerline of the embankment. The results show that settlement develops gradually with the increasing period of soil consolidation. The excess pore water pressure of deep subgrade soils under embankment centerline rise due to the increased load. Aft

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7

Poorahong, Hatairat, and Pochara Kruavit. "Using Triaxial Geogrid in Reinforcing Crushed Rock Base Constructed on Soft Soil Subgrade." Key Engineering Materials 1000 (December 17, 2024): 87–94. https://doi.org/10.4028/p-k6dxkw.

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This study examined the performance of an unpaved road reinforced with a triaxial geogrid built on a soft clay subgrade. The test setup featured a fully instrumented unpaved road model comprising a 0.2-m-thick crushed rock base supported by a 0.8-m-thick soft clay subgrade. The triaxial geogrid was positioned between the base and subgrade layers. Plate bearing tests were performed following ASTM standards. The thickness of the triaxial geogrid-reinforced base layer played a critical role in determining the unpaved road model’s ultimate bearing capacity and failure modes. Results showed that th

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8

Rochim, A., and L. Fitriyana. "Characterization of Subgrade Soil of Lowland Areas of Semarang City." IOP Conference Series: Earth and Environmental Science 971, no. 1 (2022): 012034. http://dx.doi.org/10.1088/1755-1315/971/1/012034.

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Abstract The northern part of Semarang city has been suffering a lot from settlement and inundation caused by rainfall and tidal flood. The settlement is predicted to emerge from the subgrade soil containing soft soil with low bearing capacity and high compressibility. This study aims to characterize subgrade soil of lowland areas of Semarang city. In order to define the depth of soft soil, site class, soil classification, and the settlement, soil data was taken from twelve locations distributed in five sub districts of Semarang lowland areas. The minimum depth of subgrade soil is 30 m below t

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9

Song, Bi Hong, Chun Ming Wang, Shu Guang Wang, Jian Hua Chen, and Lu Ke. "Soft Soil Subgrade Vacuum Preloading Consolidation Deformation Analysis of Large Rigid Foundation." Advanced Materials Research 1095 (March 2015): 556–60. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.556.

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The large rigid foundation has a high requirement on subgrade consolidation deformation, especially the soft soil subgrade, of which the design and construction is very difficult. Through the analysis on subgrade treatment process of a sewage treatment plant in Zhejiang Province, this paper introduces the mathematical calculation model and the specific calculation method for treating the soft soil subgrade with the vacuum preloading method. The calculation results obtained has basically reflected the actual deformation process of the subgrade; it is a rational referential calculation method to

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10

Liu, Song-Yu, Guang-Hua Cai, Guang-Yin Du, Liang Wang, Jiang-Shan Li, and Xing-Chen Qian. "Field investigation of shallow soft-soil highway subgrade treated by mass carbonation technology." Canadian Geotechnical Journal 58, no. 1 (2021): 97–113. http://dx.doi.org/10.1139/cgj-2020-0008.

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The innovative carbonation technique based on reactive MgO and CO2 has been identified as an environmentally friendly and efficient method in the improvement of weak soils. Previous laboratory studies have indicated that carbonated MgO-admixed soils had significant improvement in mechanical properties. However, there are to date limited investigations on the soft-soil field application of this technique. In this study, a field trial was conducted to ascertain the feasibility of the MgO mass carbonation technique in improving shallow soft-soil subgrades. A series of field tests, including tempe

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11

Zhang, Wen, Chong Fan, Ming Lei, and Zhibin Li. "Design of treatment scheme and identification method of treatment effect for soft soil subgrade." Vibroengineering Procedia 55 (September 27, 2024): 8–13. http://dx.doi.org/10.21595/vp.2024.24117.

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According to the characteristics of the soft soil subgrade in the Haiou Island section of Nansha Bridge, a comprehensive geological survey and soil analysis were conducted. Based on the analysis results, a corresponding design scheme for the soft soil subgrade was formulated to ensure bridge safety and stability. Furthermore, various reinforcement measures such as compaction, drainage, and lightweight soil were implemented to mitigate the impact of soft soil filling on the bridge structure. To evaluate the effectiveness of our treatment method, post-construction effect testing was performed us

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12

Hasriana, Lawalenna Samang, Tri Harianto, and M. Natsir Djide. "Bearing capacity improvement of soft soil subgrade layer with Bio Stabilized Bacillus Subtilis." MATEC Web of Conferences 181 (2018): 01001. http://dx.doi.org/10.1051/matecconf/201818101001.

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The problem that is often faced in a road construction is a soil subgrade (soft soil). If the subgrade has a low bearing capacity, causing the soil to decrease greatly, so the road construction will quickly be damaged. Method to overcome the problem is bio stabilization with bacteria utilization. The purpose of this research is to know the bearing capacity improvement of soft soil as subgrade layer with bacteria solution of bacillus subtilis. Tests include soil physical and mechanical properties, compaction parameters and CBR tests. This test is based on ASTM for each test. Variations in addit

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13

Wang, Jiang, and Long Cai Yang. "Measures and Mechanism of Reinforcement of Soft Subgrade of High Speed Railway in Operation." Applied Mechanics and Materials 353-356 (August 2013): 866–71. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.866.

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Some subgrade of high-speed railway in operation occurred abnormal settlement,so need to reinforcement, however, the reinforcement measures and these mechanism have got little attention. Numerical analysis method was adopted to study the mechanism and effects of the grounting and churning pile which was used to reinforce soft soil subgrade a high-speed railway Results shows that the settlement and lateral deformation not symmetrical distribution but got larger along the inclined derection of stratum, reinforcement by grouting can decrease the settlement and the transverse differential deformat

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14

Ashik, M. Mohamed. "Stabilization of Soft Subgrade Soil with Non-Woven Coir Geotextiles." International journal of Emerging Trends in Science and Technology 04, no. 05 (2017): 5200–5202. http://dx.doi.org/10.18535/ijetst/v4i5.13.

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15

Yu, Shu Qiang, and Peng Ju Qin. "Strength and Deformation Analysis of the Double-Layer Subgrade by Finite Element Method." Applied Mechanics and Materials 52-54 (March 2011): 1348–52. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1348.

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In the area of alluvial soft soil, the double layer subgrade with rigid upper layer and soft lower layer is common. In such subgrade, the stress diffusion phenomena will occur under vertical load. In this paper, the stress and deformation of such subgrade are studied by ABAQUS. According to the calculation results, the plastic zone of subgrade appears in the upper layer soil of the interface, and then, it expands up and down the interface with the increase of load. The plastic zone expands rapidly in the lower layer soil. Finally, the subgrade gets up to its ultimate bearing capacity when the

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16

Paneru, Harish, Mohan Prasad Acharya, and Indra Prasad Acharya. "Cement Stabilization of soft soil subgrade and Cost Analysis." Kathford Journal of Engineering and Management 2, no. 01 (2023): 1–16. http://dx.doi.org/10.3126/kjem.v2i01.61765.

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The soft soil when present in subgrade creates a lot of problem in highways. Due to soft soil subgrade, the rutting is predominant cause of flexible pavement failure all around the world. This kind of soil is either replaced or modified prior to construction of other layers of road to minimize the formation of rut. This study deals with stabilization of soft soil subgrade by cement. The sample was collected from a depth around existing road subgrade. A series of laboratory tests on untreated soil sample was first done to determine the competency of soil as a subgrade layer followed by preparat

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17

Yang, Tan Shu, Yang Qu Tan, and Cui Juan Luo. "Application of Pine Piles for Strengthening High Slope Channel Retaining Walls on Soft Soil Subgrade." Applied Mechanics and Materials 438-439 (October 2013): 1190–94. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.1190.

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In the modification of narrow deep soil channels of early urban excavation, because of great depth and steep slope, the gravity retaining wall slope will be needed. The problems of soft soil subgrade treatment at channel bottom have to be solved. Combined with the old channel treatment project of a city, as practical example, the method by which the soft subgrade of channel retaining walls strengthening with pine piles, is described. By application of Coulomb Theory, the stability calculation for gravity pitch-up oblique retaining walls is conducted. The results show that using pine piles is a

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18

Jusi, U., P. Dhamrodji, and H. Maizir. "Foam Mortar Layer in Soft Subgrade Embankment: A Review." IOP Conference Series: Earth and Environmental Science 1321, no. 1 (2024): 012040. http://dx.doi.org/10.1088/1755-1315/1321/1/012040.

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Abstract Soils are the basis of the construction of civil engineering structures that are designed to support and withstand the weight of the structures above them. The main problems of soft soil include low bearing capacity and large settlement. In road pavements, the sub grade as the bottom layer of the road must have a good bearing capacity. Subgrade is a part that must be considered because of the weight of the pavement structure and the embankment above it. Soft soil conditions cause the need for reinforcement of the sub grade layer. Solving the problem of road construction is done by eng

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19

Zhang, Ming, Nan-nan Li, and Min Yang. "THE MULTI-FACTOR CONTROL AND EVALUATION OF HIGHWAY SOFT SOIL SUBGRADE STABILITY." Stavební obzor - Civil Engineering Journal 31, no. 3 (2022): 427–43. http://dx.doi.org/10.14311/cej.2022.03.0032.

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When the surcharge preloading method is used in the treatment of soft soil subgrade, it is necessary to squeeze for more preloading drainage consolidation time under the premise of controlling the subgrade stability during the filling period. Considering the mutation of each monitoring indices and their interrelation when instability occurs in the fill subgrade, the inflection point analysis method through monitoring indices to control the subgrade stability comprehensively was proposed in this paper. The thin-layer rotary adding method was used to determine the ultimate filling depth and the

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20

Yang, Liang, Wenyuan Xu, and Keke Li. "Analysis of the Embankment Settlement on Soft Soil Subgrade with a Cement Mixed Pile." Advances in Civil Engineering 2021 (November 28, 2021): 1–15. http://dx.doi.org/10.1155/2021/9949720.

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The settlement of the widening of soft soil subgrade highways is typically associated with different treatment positions of cement mixed piles. In order to overcome this, in the current paper we employ the finite element method to simulate and analyze the influence of piles under an existing road slope and under an existing subgrade and new embankment on the settlement characteristics of the subgrade and foundation. In particular, we focus on the influence of the pile length and pile spacing on the subgrade and foundation settlements based on a northern high-speed reconstruction and expansion

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21

Puppala, Anand J., Louay N. Mohammad, and Aaron Allen. "Engineering Behavior of Lime-Treated Louisiana Subgrade Soil." Transportation Research Record: Journal of the Transportation Research Board 1546, no. 1 (1996): 24–31. http://dx.doi.org/10.1177/0361198196154600103.

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Lime stabilization is often used to treat subgrade soils when they are soft and cohesive in nature. A study was conducted to investigate the engineering behavior, including the resilient and strength behaviors, of a lime-treated subgrade soil. The lime treatment procedure was adapted from the specifications of the Louisiana Department of Transportation and Development. Silty clay, a soil often found in Louisiana subgrades, is used as a base soil. A summary of various engineering properties of a lime-treated soil from resilient modulus, unconfined compression strength, and California bearing ra

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22

Xiong, Feng, Xuebin Wang, Fan Yang, Jiaqiang Yang, Li Hu, and Rui Li. "Analytical and Numerical Study on the Stability of Highway Subgrade with Embedded Loading Berm in Soft Soil Area." Applied Sciences 12, no. 23 (2022): 12440. http://dx.doi.org/10.3390/app122312440.

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Loading berm is an effective method for improving highway subgrade stability in soft soil areas. However, this method requires lots of construction space. It is not applicable in some areas with narrow construction spaces. To address this problem, an embedded loading berm (ELB) is proposed to improve highway subgrade stability, and the effects of ELB on the stability of the highway subgrade were investigated by analytical and numerical methods. Firstly, an analytical model was proposed to analyze the relationship between the ELB dimensions and subgrade stability factors. Then, numerical simula

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23

Yuswandono, Mulyadi, Andri Krisnandi Somantri, Atmy Verani Rouly Sihombing, Aditia Febriansya, Daniel Octova Agusaputra, and Salma Fadhilah Suryadi. "Finite Element Analysis of Rigid Pavement Over Improved Subgrade Using Nanomaterial in Karawang Regency, Indonesia." Potensi: Jurnal Sipil Politeknik 24, no. 2 (2022): 109–15. https://doi.org/10.35313/potensi.v24i1.4743.

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In this paper, the influence of improved subgrade condition of rigid pavements using nanomaterials using Finite Element Method will be discussed. The soil used as subgrade is obtained from National North Coast Road Corridor in Karawang Regency, Indonesia and categorized as soft clay or CH. Soft soil is a type of soil with low bearing capacity and high compressibility. This causes problems on rigid pavements; one example is cracks due to settlements of subgrade. Soft subgrade needs to be improved so that the rigid pavement will not deteriorate during design life. This study aims to analyze the

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Suyuti, Suyuti, and Mukhlis Muslimin. "An Empirical Study for Estimating Ultimate Bearing Capacity of Concrete Small-Pile Cluster in Soft Clays." Journal of Applied Engineering and Technological Science (JAETS) 6, no. 2 (2025): 1397–411. https://doi.org/10.37385/jaets.v6i2.4789.

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Soft subgrades with shear strength, cu of 10 kPa to 25 kPa are given low bearing capacity and high settlement. Local government has been built infrastructure of embankment such unpaved road on the soft subgrade by using timber and bamboo materials (called “Cerucuk”) are very familiar for Indonesian local people. By developing load capacity of floating pile type, bamboo pile cluster was applied for Tol road in North the Java Island. However, bamboo material limited of life construction inside the soft ground, and exploitation of timber pile was violated environmental issue. Therefore, this rese

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25

Jusi, Ulfa, P. Pratikso, and Harnedi Maizir. "Numerical model analysis of subgrade settlement with foam mortar reinforcement based on thickness variation." Journal of Applied Engineering Science 22, no. 4 (2024): 810–18. https://doi.org/10.5937/jaes0-53365.

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Soft soils have low bearing capacity characteristics and can cause high settlement. Sub grade which becomes the lowest layer in road construction is expected to have a strong bearing capacity so that it can carry the construction load on it. To overcome this problem, it is necessary to reinforce it. Problems will arise if the thickness of the soft soil in the subgrade varies. So, it needs to know and identify the scale of declining that occurs if the soft soil variation is reinforced on it. Foam mortar is an alternative reinforcement that is expected to improve the properties of the soft soil.

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Anggraini, Muthia, P. Pratikso, and Harnedi Maizir. "Numerical modeling of embankment on thin clay soil with geofoam." Journal of Applied Engineering Science 22, no. 4 (2024): 819–27. https://doi.org/10.5937/jaes0-53366.

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Soft soils cause problems in road subgrades because they have low bearing capacity. Embankments on soft ground need to be identified and reviewed before construction starts. Various soil reinforcement techniques can be used to improve soft soil conditions. This research focuses on using geofoam material as an embankment on soft soil. The aim is to analyze the modeling of soft soil embankment with geofoam. The research method is a numerical method using the Plaxis 2D version 2023 application. There are two models in this study, namely the embankment model without geofoam, 100 cm thick subgrade,

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27

Lin, Yang, and Ya Bo He. "Key Construction Technology for Highway on Soft Foundation." Advanced Materials Research 243-249 (May 2011): 6113–17. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.6113.

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In recent years, a lot of research practices have been done on improving the quality of subgrade construction and solving the differential settlement of subgrade. Therefore, key construction technology for highway on soft foundation is very important. This paper analysis common engineering problems on soft foundation and the development status for soft soil treatment technology, then build up the technology trends on it.

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Wahyuni, Nanda Dwi, Andius Dasa Putra, Aminudin Syah, and Iswan Iswan. "Kinerja Fly Ash terhadap Stabilisasi Tanah Lunak sebagai Material Perbaikan Tanah Dasar (Subgrade)." Jurnal Rekayasa Sipil dan Desain 9, no. 3 (2021): 547–58. https://doi.org/10.23960/jrsdd.v9i3.1976.

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Subgrade has an important role in road construction work planning. However, a problem may appear because the soil which is used as the subgrade material has low quality, such as soft soil. One of the parameters to know the quality of the soil is by CBR testing and Atterberg Limit to know the index properties of soil that affect the quality. It is necessary to improve the subgrade soil through stabilization to produce construction materials based on standards by using additives in the form of fly ash. In this study, some variations of fly ash as a stabilization material are 0%, 5%, 10%, and 15%

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Dea Pratiw, Selly, and Isdaryanto Iskandar. "SOIL SUBSTANCE ANALYSIS USING PVD WITH VACUUM CONSOLIDATION METHOD (VCM)." International Journal of Engineering Applied Sciences and Technology 7, no. 5 (2022): 57–66. http://dx.doi.org/10.33564/ijeast.2022.v07i05.010.

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The construction of toll roads on soft clay has the main problems of the relatively low bearing capacity of the subgrade and the relatively large and long duration of subgrade compression. The infrastructure built on the subgrade could be damaged before it reaches its planned age if the subgrade not repaired first. The selection of the soft clay soil handling method considers the cost and time at the time of construction in the field. For this reason, alternative methods needed that are cost and time efficient and have minimal risk to environmental impacts. The vacuum consolidation method (VCM

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30

Sahrul R., Mohammad. "Numerical Modeling of Soil Embankment on Soft Soil Using Variation of Expanded Polystyrene (EPS) Geofoam Material Type." Sustainable Civil Building Management and Engineering Journal 1, no. 4 (2024): 8. http://dx.doi.org/10.47134/scbmej.v1i4.2871.

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Subgrade is the layer of soil that lies beneath the pavement. The subgrade plays an important role in supporting and spreading the load from the pavement to the underlying soil. Terzaghi, et al. (1967) state that soft soils can pose serious challenges in geotechnical engineering, due to their tendency to experience large settlement under structural loads. Handling soft soils often requires specialized methods such as preloading, vacuum consolidation, or the use of geosynthetics to improve stability. One of the geosynthetics used in handling soft soil is Expanded Polystyrene (EPS) Geofoam. This

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Dhimal, Suman, and Gopal Gautam. "Laboratory Investigation on Improving Strength of Weak Subgrade Soil using Saw Dust Ash with Stone Dust." Journal of Science and Technology 4, no. 1 (2024): 53–57. https://doi.org/10.3126/jost.v4i1.74566.

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Performance of Flexible Pavement depends on the functions of the component layers especially subgrade. Subgrade is natural layer of soil which takes all load of pavement as well as load coming to pavement. Stability of pavement depends upon stability of subgrade. The conventional approach of stabilization of soft subgrade is to remove the soft soil, and replace it with soil of high strength. The high cost of replacement of weak soil has caused highway agencies to assess alternative methods to construct the highway over weak subgrade. Soil stabilization is one of the most suitable alternatives

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Chhetri, Sagar, and Plaban Deb. "Finite Element Analysis of Geogrid-Incorporated Flexible Pavement with Soft Subgrade." Applied Sciences 14, no. 13 (2024): 5798. http://dx.doi.org/10.3390/app14135798.

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Improving the durability of flexible pavements and constructing new roads on weak soil foundations present significant challenges, prompting designers to explore alternative methods to prolong pavement lifespan. Geosynthetics have emerged as a promising solution for soil stabilization, with various materials developed for this purpose. The current study concentrates on using the finite element (FE) method to examine the effectiveness of geogrid-incorporated flexible pavements on soft soil substrates. A three-dimensional layered pavement is constructed with an FE model, incorporating subgrade l

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Liu, Yan Yan, Tian Qing Ling, and Zhong Wen Huang. "Mechanism Analysis of GSPS System Strengthening Soft Base." Advanced Materials Research 243-249 (May 2011): 4248–52. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.4248.

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This paper analyzes the mechanism of geogrid-broken stone pile reinforced sand-gravel cushion soft base strengthening system (GSPS) using finite element based on the substantial project of a expressway in Sichuan province. The calculation results indicate that the GSPS system can significantly improve the vertical displacement (settlement) of subgrade with the vertical displacement around pile decreasing around 15%, and the subgrade displacement tends to be more uniform and smooth. Also, the GSPS system improves the horizontal displacement of subgrade the most compared with the common broken s

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Pang, Chuan Qin. "Highway Slope Stability Analysis Based on Strength Decrease of the Subgrade." Applied Mechanics and Materials 90-93 (September 2011): 3166–72. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.3166.

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In long-term operation process, highway subgrade is subjected to strength decrease easily，and the water environment around often causes the side slope side-slipping. In allusion to the common clay, massive indoor triaxial tests have been carried on, the relationship between the shear strength index and the water content, compactness of the compaction clay has been determined. Based on the above research, slope stability analysis software GEO-SLOPE is used, to analyze common earth fill subgrade, soft soil ground, mountainous area subgrade and earthquake area subgrade separately. The impact of s

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Sorsa, Alemineh, Sanjaya Senadheera, and Yoseph Birru. "Engineering Characterization of Subgrade Soils of Jimma Town, Ethiopia, for Roadway Design." Geosciences 10, no. 3 (2020): 94. http://dx.doi.org/10.3390/geosciences10030094.

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Soils are naturally occurring materials that carry loads of civil engineering structures including roads and buildings. However, not all natural soils are suitable for such uses due to limited strength and instability under varying environmental conditions. A lack of adequate geotechnical investigations and soil characterization can result in the over-design of foundations, unexpected excavations to remove unsuitable soils, cost overruns, construction delays; and, contract disputes. In this research, an experimental plan was executed to determine the engineering properties of subgrade soil in

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Song, Xiu Guang, Yi Fan Yu, Hong Bo Zhang, Hong Chao Li, Jian Qing Wu, and Chao Li. "Study on New Technology of Treatment of Capillary Water in Subgrade with Soft Permeable Pipe Filled with Sand." Advanced Materials Research 1051 (October 2014): 692–95. http://dx.doi.org/10.4028/www.scientific.net/amr.1051.692.

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The technique took into account the high underground water level silty soil with stronger capillarity, subgrade soil easy water softened in Yellow River flood plain areas. It seriously affected the stability of subgrade. If lay a layer of gravel cushion in the ground, and then buried soft permeable pipes in the lower part of embankment, the permeable pipes filled with sand, the top of pipes sealed with geotextile, it would form the vertical drainage channel for the capillary water. So capillary water would along the vertical drainage channels formed by sand core soft permeable pipe and horizon

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Iskandar, Dedi, Elsa Eka Putri, Abdul Hakam, and Arniza Fitri. "Effectiveness Of Portland Cement Type 1 In Stabilizing Soft Clay Soil As Subgrade For Road Construction." Jurnal Rekayasa Sipil (JRS-Unand) 19, no. 1 (2023): 44. http://dx.doi.org/10.25077/jrs.19.1.44-53.2023.

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Sawah Lunto – Talawi road segment (STA 139 + 700 m) in Sawah Lunto city, West Sumatera province has sustained major damages and been the scene of several accidents since the past few years. The degression of soft clay subgrade, which has a limited bearing capacity and makes it structurally impractical to sustain road construction, was discovered to be the source of these damages. As a recent option for enhancing soil qualities, soil stabilization by employing a variety of pozzolanic and industrial materials has gained popularity. The objective of this study is to investigate the effectiveness

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DJELLALI, Adel, Debojit SARKER, Ala HOUAM, and Zoubir AOULMI. "BEHAVIOR OF AIRPORT FLEXIBLE PAVEMENT OVER SWELLING SOIL REINFORCED BY NEW ASPHALT LAYERS." MINAR International Journal of Applied Sciences and Technology 05, no. 03 (2023): 155–63. http://dx.doi.org/10.47832/2717-8234.16.11.

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Longitudinal fractures are a common occurrence in runway pavements built on expansive soil subgrades. Such soil behavior leads to a reduction in the carrying capacity and lifespan of runways, as variations in water content accelerate cracking and deformations in the various pavement construction layers. To examine the behavior of reinforced runway flexible pavement over expanding subgrade soil, this study uses experimental and numerical analyses. Non-destructive deflection test is used to assess static behavior, measuring deformations and stresses in various runway profiles both before and aft

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Mittal, Ayush, and Shalinee Shukla. "Influence of Geotextile and Geogrid Reinforcement on Strength Behaviour of Soft Silty Soil." Applied Mechanics and Materials 877 (February 2018): 264–69. http://dx.doi.org/10.4028/www.scientific.net/amm.877.264.

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Roads are the most important component for the economic and social development of any country. India has a total road network of more than 6 million kilometers, which carry around 90% of passenger traffic and 65% of freight traffic. More than 20% land area of India is covered with soils having low California bearing ratio (CBR) and shear strength values. The pavement constructed over such soils will lead to rapid increase in construction and maintenance costs. This study presents a laboratory investigation about the combined effect of geotextile and geogrid reinforcement, placed in layers at v

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Ma, Yong, Mao Tian Luan, and Zhong Chang Wang. "Experimental Study on Dynamic Compaction-Plastics Drain Board Method in Backfill Subgrade Reinforcement." Key Engineering Materials 474-476 (April 2011): 2032–36. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.2032.

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Plastics drain board method is one of the most effective ways of reducing excess pore water pressure during the process of dynamic compaction in soft soil subgrade reinforcement. Based on field test in neritic backfilled area of Jinzhou Port 207B berth, the pore water pressure, groundwater level, subgrade bearing capacity and time effect of deformation have been measured and analyzed. The application of dynamic compaction-PDB method makes a mighty advance of the dynamic compaction method, which provides a new way for soft soil treatment in coastal areas.

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Anggraini, M., P. Dhamrodji, and H. Maizir. "Geofoam Block in Soft Soil Embankment Applications: A Review." IOP Conference Series: Earth and Environmental Science 1321, no. 1 (2024): 012019. http://dx.doi.org/10.1088/1755-1315/1321/1/012019.

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Abstract The major issues of building a road over soft soils are low bearing capacity and large settlements. The challenges of road construction on soft soils are enormous, so innovative and environmentally friendly methods are required. Geofoam is a type of lightweight infill material and was already used in Norway in road construction applications in 1972. Using Geofoam reduces compacted fill by 40%, less excavation required and less pulverization of native soil making this a time-saving and economically and environmentally viable solution. The purpose of Geofoam backfill is for lightweight

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Su, Xiao Cheng, and Hai Zhen Liu. "Using the Finite Element Method Analysis of Tianjin 112 State Line Road Soft Soil Subgrade." Applied Mechanics and Materials 501-504 (January 2014): 372–75. http://dx.doi.org/10.4028/www.scientific.net/amm.501-504.372.

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By using the finite element method we had studied the Tianjin Expressway Subgrade Settlement.Through the comparison of the reinforcement and the unreinforced two case we studied the principles of strengthening soft soil subgrade and results show that the mixing pile to improve the bearing capacity of the embankment foundation, reduce the settlement of foundation has played a very good role.The finite element method can reflect the nonlinear characteristics of the coupling effect between composite foundation pile, soil and the soil around the pile, the soil using elastoplastic model, and consid

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Omowumi, Ademila. "GEOTECHNICAL INFLUENCE OF UNDERLYING SOILS TO PAVEMENT FAILURE IN SOUTHWESTERN PART OF NIGERIA." Malaysian Journal of Sustainable Environment 4, no. 1 (2018): 19. http://dx.doi.org/10.24191/myse.v4i1.5604.

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Roads in Nigeria are usually constructed without in-depth knowledge of the subsoil that serves as the foundation for the road elements. Road failures are often associated to poor construction materials or inadequate design without cognisance of the underlying soils. Engineering properties of ten bulk soil samples collected from the subgrade of Arigidi/Oke-Agbe highway were investigated to determine their suitability for highway pavement. Results show that all the subgrade soils below the failed locations have higher plasticity indices, which is an indication of their high swelling potential, a

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Jiang, Xunli, Zhiyi Huang, and Xue Luo. "An Improved Mechanistic-Empirical Creep Model for Unsaturated Soft and Stabilized Soils." Materials 14, no. 15 (2021): 4146. http://dx.doi.org/10.3390/ma14154146.

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Soft soils are usually treated to mitigate their engineering problems, such as excessive deformation, and stabilization is one of most popular treatments. Although there are many creep models to characterize the deformation behaviors of soil, there still exist demands for a balance between model accuracy and practical application. Therefore, this paper aims at developing a Mechanistic-Empirical creep model (MEC) for unsaturated soft and stabilized soils. The model considers the stress dependence and incorporates moisture sensitivity using matric suction and shear strength parameters. This form

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Hossain, Md Belal, Md Roknuzzaman, Md Asib Biswas, and Motaharul Islam. "EVALUATION OF ENGINEERING PROPERTIES OF THERMAL POWER PLANT WASTE FOR SUBGRADE TREATMENT." Journal of Civil Engineering, Science and Technology 12, no. 2 (2021): 112–23. http://dx.doi.org/10.33736/jcest.3975.2021.

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Soft cohesive soils have low strength, high plasticity, and a large expansion ratio making them unsuitable as a road subgrade. This study aims to evaluate the potential of power plant waste (fly ash) from the Barapukuria Thermal Power Plant, Dinajpur, Bangladesh to improve the characteristics of such soft cohesive soil. X-ray fluorescence test conducted to classify the power plant fly ash and the type was identified as “Class F” according to “American Association of State Highway and Transportation Officials” and "American Society for Testing and Materials". Laboratory tests were conducted on

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Liu, Shuang, Panpan Guo, Xian Li, Kai Wang, and Rui Tang. "Settlement Behavior of Composite Foundation with Deep Mixed Piles Supporting Highway Subgrades in Water-Rich Flood Plains." Water 15, no. 11 (2023): 2048. http://dx.doi.org/10.3390/w15112048.

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The settlement behavior of composite foundations plays an important role in the serviceability and stability of the subgrade or other infrastructures supporting the foundation. However, in water-rich flood plains, due to the complexity of the soft soil properties, the settlement behavior has not been well understood. The objective of this study is to investigate the effects of various key factors on the settlement behavior of composite foundations with deep mixed piles supporting highway subgrade in water-rich flood plains. The investigated subgrade is in operation, and the vehicle load is tak

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Yuan, Yu Qing, Wei Li, Xue Chan Li, and Tao Guo. "Vibro-Replacement Stone Column Treating Silty Sand Soil Subgrade." Applied Mechanics and Materials 256-259 (December 2012): 1060–63. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.1060.

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To improve the wet soft silty sand bearing capacity, vibro-replacement stone column was used. Compared with the practical construction, this paper introduces the vibro-replacement stone column strengthening soft foundation. The principle of the construction, quality control, and inspection technology were discussed. Based on Drucker - Prager elastic-plastic model, different high wet soft foundation was simulated with the numerical analysis software. Results show that vibro-replacement stone column can significantly reduce the roadbed horizontal displacement. The displacement of the subgrade re

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Auli, Septriza, Andius Dasa Putra, Aminudin Syah, and Iswan Iswan. "Pengaruh Suhu Pemeraman terhadap Kinerja Fly Ash untuk Tanah Lempung Lunak." Jurnal Rekayasa Sipil dan Desain 9, no. 3 (2021): 533–46. https://doi.org/10.23960/jrsdd.v9i3.1953.

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One of the construction problems that is often encountered in the world, including Indonesia, is the construction of highways carried out on soft soil subgrade. In general, the improvement of soft subgrade is carried out with special modifications or handling, one of which is by stabilization so the subgrade can be used based on the standards. The use of fly ash as a stabilization material is considered an effective option because of its economical price and the elements in it have the ability to harden and increase strength when reacting with water. This study aims to find out the improvement

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Wu, Da Zhi, and Zhen Ying Zhang. "Study on the Settlement of Soft Soil Subgrade with a Crust Layer." Applied Mechanics and Materials 505-506 (January 2014): 82–88. http://dx.doi.org/10.4028/www.scientific.net/amm.505-506.82.

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By using the finite element method, the settlement of soft soil subgrade with a crust layer has been investigated. To find the influence of thickness of the crust layer on the settlement, four different thicknesses, which are 0.0m, 1.5m, 3.5m and 5.5m, are selected. Besides, the settlement during the construction and post construction are also analyzed. It is found that the crust layer can reduce the settlement and uneven settlement of subgrade effectively. Besides, the settlement of the subgrade decreases with the increase of the thickness of crust layer. Moreover, with the increase of time,

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Zuo, Shen, Tian-yu Li, Peng Jiang, Xiang-long Zuo, and Jin Li. "Study on the In Situ Test of the Treatment Effect for the Riverbank Soft Soil Subgrade in the Hetao Area." Geofluids 2022 (July 30, 2022): 1–12. http://dx.doi.org/10.1155/2022/9410466.

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The Inner Mongolia Hetao area has a widely distributed riverbank fluvial soft soil with high groundwater levels and ground surface water. This situation may incur some potential engineering problems for the Linhe-Baigeda section of the Beijing-Xinjiang Expressway, such as subgrade settlement control and waterproofing. In situ experiments were conducted on the site using five subgrade base treatment schemes for subgrade construction. The long-term monitoring of various technical indicators like settlement, earth pressure, pore water pressure, and reinforcement material deformation was carried o

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