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Journal articles on the topic 'In-Situ-Test methods'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Naser, Kabashi. "Evaluation the Compressive Strength in Concrete Structures Using the In-situ Test Methods." Journal of Civil Engineering and Environmental Sciences 2, no. 1 (2015): 001–4. https://doi.org/10.17352/2455-488x.000007.

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The new concrete Standards give rules for in-situ checking if the hardened concrete in structure achieved the designed compressive strength according the request the class of concrete. Different concrete elements in structure request the different access during the examinations and different analytical analysis. Using the different examination methods will be the main aim on evaluations of concrete strength, always in comparing with requested design class. Core testing and other nondestructive methods assessing strength of surface concrete are generally less reliable than cores, but less damag

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2

Li, Qiang, You Hong Sun, and Xin Fang. "In Situ Thermal Response Test Methods And Practices." Advanced Materials Research 347-353 (October 2011): 3087–92. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3087.

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Abstract. As a high efficiency, low consumption and clean energy, ground source heat pump technology has been pay more and more attention, the number of installation of system is growing rapidly. However, the use of geothermal resources is still extensive at this stage. Effective methods are pure in obtaining thermal physical parameters of geothermal wells around. In-situ thermal response testing is close to the real use of heat pumps, when injecting in or extracting heat from geothermal wells, the testing equipment will collect data, and then thermal physical parameters will be accurately cal

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3

Tang, Yan Chun, Gao Tou Meng, and Ji Chang Gong. "Study on Consolidation Coefficient by Different Test Methods." Advanced Materials Research 308-310 (August 2011): 1778–81. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1778.

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Through indoor consolidation test and CPTU model test and CPTU in-situ test, the soil consolidation coefficient has been studied. Compared with the consolidation coefficient by indoor test equipment and CPTU, because in-situ test has been made by CPTU, but in indoor consolidation test the error caused by the disturbance and little size of clay soil sample has been existed, the soil consolidation coefficient by CPTU can reflected the soil consolidation characteristics more accurate than by indoor consolidation test. Compared with the consolidation coefficient by remolded clay soil of CPTU model

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4

Amasaki, Shoji, Kazuhiro Kuzume, and Toyoaki Miyagawa. "Diagnosing in Situ Concrete by Some Non-Destructive Test Methods." Concrete Research and Technology 5, no. 1 (1994): 15–22. http://dx.doi.org/10.3151/crt1990.5.1_15.

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5

Li, Zhao Yan, Yu Run Li, and Long Wei Chen. "In Situ Test Methods in Bachu-Jiashi Earthquake Liquefied Evaluation." Applied Mechanics and Materials 166-169 (May 2012): 2128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.2128.

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The serious soil liquefaction phenomenon in Bachu-Jiashi earthquake on 24th February, 2003, which is the most prominent phenomena of sand liquefaction since the Tangshan Great Earthquake in 1976. Based on the earthquake liquefied investigation, inspect SPT and CPT applicability in situ tests. The results show that our country SPT specification and CPT specification of non-liquefied sites evaluation rate is higher than liquefied sites evaluation success rate, the liquefied sites evaluation rate are 88% and 88% respectively, but for liquefied sites evaluation rate are 38% and 55%. The result is

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6

Glaser, Steven D., and Riley M. Chung. "Estimation of Liquefaction Potential by in Situ Methods." Earthquake Spectra 11, no. 3 (1995): 431–55. http://dx.doi.org/10.1193/1.1585822.

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This report examines the state-of-the-art of in situ methods of estimating liquefaction potential in sands. In situ methods are especially important since “undisturbed” samples of loose sand for laboratory testing are virtually unobtainable. Various penetration test methods are examined, such as the SPT, DMT, and the CPT and variants. These methods are completely empirical in nature, and have worked well to date. The current state-of-practice is an SPT-based method. Intrusive, seismic-based tests are also examined: the cross-hole, down-hole tests, and down-hole logger. The seismic velocity-bas

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7

Robertson, P. K. "In situ testing and its application to foundation engineering." Canadian Geotechnical Journal 23, no. 4 (1986): 573–94. http://dx.doi.org/10.1139/t86-086.

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The status of in situ testing and its application to foundation engineering are presented and discussed. The in situ test methods are discussed within the framework of three groups: logging, specific, and combined test methods. The major logging test methods discussed are standard penetration test (SPT), cone penetration test (CPT), and the flat plate dilatometer test (DMT). The major specific test methods discussed are the prebored pressuremeter test (PMT), the self-bored pressuremeter test (SBPMT), and the screw plate load test (SPLT). Discussion is also presented on recent tests that combin

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8

Abdel Rahim, Khalid Abdel Naser. "Evaluating Concrete Quality using Nondestructive In-situ Testing Methods." Revista Tecnología y Ciencia, no. 36 (October 10, 2019): 22–40. http://dx.doi.org/10.33414/rtyc.36.22-40.2019.

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This manuscript investigate the quality of concrete using non-destructive in-situ testing.The in-situ testing is a process by which different test are carried out such as rebound hammer, ultrasonic pulse veloc-ity, initial surface absorption test and fig air, to determine thein-situ strength, durability and deterioration, air permeability, concrete quality control andperformance. Additionally, the quality of concrete was researched using test methods with experimental results. Moreover, this research has found that (1) the increase in w/c ra-tioleads to a decrease in compressive strength and u

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9

Petkovšek, Ana, Matej Maček, and Jasna Smolar. "TESTING METHODS FOR MECHANICALLY IMPROVED SOILS: RELIABILITY AND VALIDITY." Acta Polytechnica CTU Proceedings 10 (October 15, 2017): 16. http://dx.doi.org/10.14311/app.2017.10.0016.

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A possibility of in-situ mechanical improvement for reducing the liquefaction potential of silty sands was investigated by using three different techniques: Vibratory Roller Compaction, Rapid Impact Compaction (RIC) and Soil Mixing. Material properties at all test sites were investigated before and after improvement with the laboratory and the in situ tests (CPT, SDMT, DPSH B, static and dynamic load plate test, geohydraulic tests). Correlation between the results obtained by different test methods gave inconclusive answers.

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10

Chen, De Fang. "Discussion on the Bearing Capacity Determination Methods of Shallow Foundation in Shanghai Region." Applied Mechanics and Materials 339 (July 2013): 623–27. http://dx.doi.org/10.4028/www.scientific.net/amm.339.623.

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Representative engineering geological data of Shanghai were collected in this article for analyzes differences between shallow land basic bearing capacity of soil between test values and situ test values. Microstructure of soil geographical is analysis by conventional physical and mechanical tests laboratory. Collect on-site load plate test results of Shanghai shallow foundation soil, and take inversion analysis of the carrying capacity and regression analysis to calculate the bearing capacity of foundation soil test values and in situ values rationality, do a preliminary study on the current

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11

Marsland, A. "The Choice of Test Methods in Site Investigations." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 289–97. http://dx.doi.org/10.1144/gsl.1986.002.01.52.

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AbstractThe appropriate choice of sampling methods, laboratory tests and in situ tests depends upon the type of structure or earthwork being considered, the nature of the ground influenced by the construction and the required accuracy of the prediction. To obtain optimum results requires considerable experience of the design requirements and potential construction problems as well as the test methods and their range of application. Some methods are particularly useful for obtaining continuous profiles and giving a rough indication of the engineering properties while others are designed to prov

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12

Deng, Jun. "Test Methods for Mechanical Properties of Structural Adhesives." Advanced Materials Research 97-101 (March 2010): 814–17. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.814.

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One of the greatest drawbacks to predicting the behaviour of bonded joints has been the lack of reliable data on the mechanical properties of adhesives. In this study, methods for determining mechanical properties of structural adhesive were discussed. The Young’s modulus, Poisson’s ratio and tensile strength of the adhesive were tested by dogbone specimens (bulk form) and butt joint specimens (in situ form). The shear modulus and shear strength were test by V-notched specimens (bulk form) and thick adherend lap-shear (TALS) joint specimens (in situ form). The test results show that the elasti

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13

Dhir, R. K., P. C. Hewlett, and Y. N. Chan. "Near-surface characteristics of concrete: assessment and development of in situ test methods." Magazine of Concrete Research 39, no. 141 (1987): 183–95. http://dx.doi.org/10.1680/macr.1987.39.141.183.

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14

Shah, Jyotsna S., Olivia Mark, Eddie Caoili, et al. "A Fluorescence In Situ Hybridization (FISH) Test for Diagnosing Babesiosis." Diagnostics 10, no. 6 (2020): 377. http://dx.doi.org/10.3390/diagnostics10060377.

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Apicomplexan parasites of the genus Babesia cause babesiosis in humans and animals. The microscopic examination of stained blood smears, detection of serum antibodies by immunoassays, and PCR-based identification of parasite nucleic acid in blood are common laboratory methods for diagnosing babesiosis. The present study evaluated a commercially available Babesia genus-specific fluorescence in situ hybridization (FISH) test for detecting Babesia parasites in blood smears. The FISH test detected Babesia duncani and Babesia microti, two common species that cause human infections in the USA, and o

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15

Ahmad Afip, Irfan, Siti Noor Linda Taib, Kamaruzaman Jusoff, and Liyana Ahmad Afip. "Measurement of Peat Soil Shear Strength Using Wenner Four-Point Probes and Vane Shear Strength Methods." International Journal of Geophysics 2019 (February 3, 2019): 1–12. http://dx.doi.org/10.1155/2019/3909032.

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The general objective of this research was to measure the peat soil shear strength using Wenner four-point probes and vane shear strength methods. Specifically, the objective of this study was two-fold, namely, (a) investigating the relationship between laboratory soil resistivity and undrained shear strength and (b) determineing the relationship between in-situ soil resistivity and undrained shear strength. Data were randomly collected over six locations in Meranek, Sarawak, for in-situ test and three repetitions for each data were set based on three parameters. The selected parameters were s

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Dhir, R. K., P. C. Hewlett, Y. N. Chan, et al. "Discussion: Near-surface characteristics of concrete: assessment and development of in situ test methods." Magazine of Concrete Research 40, no. 145 (1988): 234–44. http://dx.doi.org/10.1680/macr.1988.40.145.234.

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17

Monteny, J., E. Vincke, A. Beeldens, et al. "Chemical, microbiological, and in situ test methods for biogenic sulfuric acid corrosion of concrete." Cement and Concrete Research 30, no. 4 (2000): 623–34. http://dx.doi.org/10.1016/s0008-8846(00)00219-2.

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18

Möri, Andreas, Martin Mazurek, Kunio Ota, Marja Siitari-Kauppi, Florian Eichinger, and Markus Leuenberger. "Quantifying the Porosity of Crystalline Rocks by In Situ and Laboratory Injection Methods." Minerals 11, no. 10 (2021): 1072. http://dx.doi.org/10.3390/min11101072.

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The porosity and pore geometry of rock samples from a coherent granodioritic rock body at the Grimsel Test Site in Switzerland was characterised by different methods using injection techniques. Results from in situ and laboratory techniques are compared by applying innovative in situ resin impregnation techniques as well as rock impregnation and mercury injection under laboratory conditions. In situ resin impregnation of the rock matrix shows an interconnected pore network throughout the rock body, consisting mainly of grain-boundary pores and solution pores in magmatic feldspar, providing an

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19

(Fear) Wride, C. E., P. K. Robertson, K. W. Biggar, et al. "Interpretation of in situ test results from the CANLEX sites." Canadian Geotechnical Journal 37, no. 3 (2000): 505–29. http://dx.doi.org/10.1139/t00-044.

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One of the primary objectives of the Canadian Liquefaction Experiment (CANLEX) project was to evaluate in situ testing techniques and existing interpretation methods as part of the overall goal to focus and coordinate Canadian geotechnical expertise on the topic of soil liquefaction. Six sites were selected by the CANLEX project in an attempt to characterize various deposits of loose sandy soil. The sites consisted of a variety of soil deposits, including hydraulically placed sand deposits associated with the oil sands industry, natural sand deposits in the Fraser River Delta, and hydraulicall

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20

Kawanda, Aksan. "RECENT ADVANCES OF CAST-IN-SITU PILE INTEGRITY TEST IN INDONESIA." INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) 1, no. 1 (2018): 23. http://dx.doi.org/10.25105/cesd.v1i1.3241.

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<p class="Abstract"><em>Deep foundations, especially cast-in-situ piles became popular and key support for most structures in limited land, so as Jakarta. The piles quality became highly dependent on the soil condition and the skill of the contactors. It’s underneath the ground and this makes inspection to its quality became much more difficult. There is many methods for inspection, either by destructive method, i.e. coring, to non-destructive method like low strain integrity test (PIT), cross-hole sonic logging (CSL) and latest is thermal integrity profiler (TIP). Some advances in

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21

Shahri, Mojtaba P., and Stefan Z. Miska. "In-Situ Poisson's Ratio Determination From Interference Transient Well Test." SPE Journal 20, no. 05 (2015): 1041–52. http://dx.doi.org/10.2118/166074-pa.

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Summary Poisson's ratio is usually determined with well logging, fracturing data, and core samples. However, these methods provide us with a Poisson's ratio that is representative of only near-wellbore regions. In this paper, a technique is proposed by extending currently used pressure-transient-testing concepts to include reservoir stresses. More specifically, the interference well test is generalized to find not only conventional flow parameters such as reservoir transmissivity and storage capacity, but also the average in-situ Poisson's ratio. This is accomplished with the generalized diffu

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22

Nie, Zhi Hong. "Comparison Experimental Study on Subgrade Compaction Quality Test Methods." Applied Mechanics and Materials 71-78 (July 2011): 4679–84. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.4679.

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The principles of the continuous test methods for compaction degree is introduced based on subgrade engineering cases. The compaction parameter CMV associated with subgrade compaction is obtained through spectrum analysis on the response of a vibratory drum during compaction operations. Comparative analysis is conducted on CMV and the in situ test index Evd, which verifies that the continuous test index CMV has a high reliability and a good correlation with Evd and can objectively and comprehensively reflect the subgrade compaction quality and provides necessary basis for the application of th

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23

Szpunar, Tadeusz, and Paweł Budak. "Methods for evaluation of “in situ” coal permeability in underground coal mines using hydrodynamic test data." Nafta-Gaz 74 (June 2018): 443–50. http://dx.doi.org/10.18668/ng.2018.06.04.

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24

Luan, Shuai, Fenglai Wang, Tiehong Wang, Zhao Lu, and Weihou Shui. "Characteristics of Gravelly Granite Residual Soil in Bored Pile Design: An In Situ Test in Shenzhen." Advances in Materials Science and Engineering 2018 (October 16, 2018): 1–13. http://dx.doi.org/10.1155/2018/7598154.

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Granite residual soil is widely distributed in south China and is treated as a special soil. Its design parameters in rotary drilling bored piles are a matter of debate due to lack of in-situ pile load tests. Back-analysis of test piles is a reliable means of studying the geotechnical capacity of granite residual soil for pile design. In this study, a series of in situ tests was conducted comprising six full-scale instrumented test piles in gravelly granite residual soil in Shenzhen to consider the effects of different construction methods. The six piles were constructed with three different r

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Köhler, Daniel, Robert Kupfer, Juliane Troschitz, and Maik Gude. "In Situ Computed Tomography—Analysis of a Single-Lap Shear Test with Clinch Points." Materials 14, no. 8 (2021): 1859. http://dx.doi.org/10.3390/ma14081859.

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As lightweight design gains more and more attention, time and cost-efficient joining methods such as clinching are becoming more popular. A clinch point’s quality is usually determined by ex situ destructive analyses such as microsectioning. However, these methods do not yield the detection of phenomena occurring during loading such as elastic deformations and cracks that close after unloading. Alternatively, in situ computed tomography (in situ CT) can be used to investigate the loading process of clinch points. In this paper, a method for in situ CT analysis of a single-lap shear test with c

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Lai, Li Sze, Yin Fong Yeong, Kok Keong Lau, and Mohd Shariff Azmi. "Preliminary Study on the Synthesis of ZIF-8 Membranes via In Situ and Secondary Seeded Growth Methods." Advanced Materials Research 1133 (January 2016): 649–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1133.649.

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In this work, synthesis of ZIF-8 membranes via in situ and secondary seeded growth methods was conducted at the preliminary stage. Synthesis durations were varied at 4 h and 36 h using in situ growth method. For secondary growth, the seeding procedure was applied through rubbing and dip-coating of the seeds on the support. The resultant membranes were characterized using X-ray diffraction (XRD) and scanning electron microscope (SEM). Subsequently, the defects of the resultant membranes were determined using nitrogen gas permeation test. The results showed that, ZIF-8 membrane synthesized using

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Li, Yuan, Lan Qiao, and Zhi Li Sui. "Integrated Application of Three In Situ Stress Measurement Techniques." Advanced Materials Research 301-303 (July 2011): 949–53. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.949.

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The CSIRO overcoring stress relief and hydraulic fracturing methods are the most popular methods used for the measurement of in-situ stress at depth. One major advantage of the CSIRO overcoring stress relief method is that the three dimensional state of stress can be obtained, but the measurement must be done in an excavated tunnel[1]. Hydraulic fracturing method can be carried out on the ground surface, but it assumed that one of the principal stresses direction is vertical[2,3]. In terms of the disadvantages of the two methods, the techniques based on core orientation and acoustic emission b

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Imamoto, K., K. Shimozawa, J. Yamasaki, and S. Nimura. "State-of-the-art-report on Non-destructive In-situ Air Permeability Test Methods for “Covercrete”." Concrete Journal 44, no. 2 (2006): 31–38. http://dx.doi.org/10.3151/coj1975.44.2_31.

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Wang, Hebo, Yifa Wang, Biao Li, Wengang Qi, and Ning Wang. "A Comparative Analysis of In Situ Testing Methods for Clay Strength Evaluation Using the Coupled Eulerian–Lagrangian Method." Journal of Marine Science and Engineering 13, no. 5 (2025): 935. https://doi.org/10.3390/jmse13050935.

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The progression of marine resource exploration into deepwater and ultra-deepwater regions has intensified the requirement for precise quantification of the undrained shear strength of clay. Although diverse in situ testing methodologies—including the vane shear test (VST), cone penetration test (CPT), T-bar penetration test (TPT), and ball penetration test (BPT)—are widely utilized for the assessment of clay strength, systematic discrepancies and correlations between their derived measurements remain inadequately resolved. The aim of this work is to provide a systematic comparison of strength

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Yang, Renshu, Shizheng Fang, Aiyun Yang, Huanzhen Xie, and Liyun Yang. "In Situ Stress Effects on Smooth Blasting: Model Test and Analysis." Shock and Vibration 2020 (January 7, 2020): 1–14. http://dx.doi.org/10.1155/2020/2124694.

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Most of the roadway excavation is completed by the drilling and blasting method. With the increase of buried depth, the existence of ground stress will generate a significant impact on the rock blasting, especially on the smooth blasting. In this study, self-made homogeneous similar materials and digital image correlation methods were used to determine influence of ground stress on the smooth blasting under uniform explosive charge parameters and various in situ stress conditions. The results show that the crack outline after blasting changes from zigzag to straight in shape, and multifractal

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Garga, Vinod K., and Mahbubul A. Khan. "Laboratory evaluation of K0 for overconsolidated clays." Canadian Geotechnical Journal 28, no. 5 (1991): 650–59. http://dx.doi.org/10.1139/t91-079.

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Most of the laboratory testing methods available for the evaluation of in situ horizontal stresses are applicable to normally consolidated or lightly overconsolidated clays. This paper describes a new laboratory method for the determination of in situ horizontal stresses of heavily overconsolidated clays using a stress-path triaxial apparatus. The proposed method is based on the concept that if the radial stress exceeds the in situ horizontal stress, while maintaining the axial stress constant and equal to the in situ vertical effective stress, only then will the sample experience significant

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Chang, M. F. "Interpretation of overconsolidation ratio from in situ tests in Recent clay deposits in Singapore and Malaysia." Canadian Geotechnical Journal 28, no. 2 (1991): 210–25. http://dx.doi.org/10.1139/t91-028.

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The stress history as indicated by the profile of overconsolidation ratio (OCR) of a soil deposit is one of the most dominant factors that influence the engineering behaviour of the soil. Its assessment, which is traditionally based on the laboratory oedometer test, is not often satisfactory. The problem arises from inevitable sample disturbance and the high cost of a detailed investigation. These difficulties can be overcome by the use of in situ tests. The field vane test, the piezocone test, and the dilatometer test are three such methods that provide indirect means for the estimation of th

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Baihaqi, Ahmad Ichsan, Dyah Utami Cahyaning Rahayu, and E. Budianto. "Effect of Drug Loading Method on Drug Dissolution Mechanism of Amoxicillin Trihydrate Encapsulated in Chitosan-Poly(N-Vinylpyrrolidone) Full-IPN Hydrogel as a Floating Drug Delivery System Matrix." Materials Science Forum 964 (July 2019): 251–56. http://dx.doi.org/10.4028/www.scientific.net/msf.964.251.

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Amoxicillin trihydrate suits to be encapsulated into a modified matrix to increase its bioavailability. In this study, the effect of drug loading methods on drug dissolution mechanism from chitosan-poly(N-vinylpyrrolidone) hydrogel with CaCO3 as the effervescent agent has been studied. It was found that the encapsulation efficiency of in situ and post loading methods were 93% and 75%, respectively. The dissolution values were 94% and 98%, respectively for in situ and post loading. The dissolution test data was incorporated into zero-order, first-order, Higuchi and Korsmeyer-Peppas models to ev

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Na, Yung-Mook, Victor Choa, Cee-Ing Teh, and Ming-Fang Chang. "Geotechnical parameters of reclaimed sandfill from the cone penetration test." Canadian Geotechnical Journal 42, no. 1 (2005): 91–109. http://dx.doi.org/10.1139/t04-064.

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Sandfill at reclaimed sites is usually formed by more than one placement method. Reclaimed sandfill is often highly variable, and the cone penetration test is most commonly used for site characterization. Correlations among the cone resistance and geotechnical parameters for sand are influenced by the in situ stress level, and it is important to incorporate the stress-level effect. In this study, cone penetration tests were performed at several levels from the top of a 10 m high surcharge, which was later removed step by step, and in situ density was determined layer by layer at the Changi Eas

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Vona, Marco. "Characterization of In Situ Concrete of Existing RC Constructions." Materials 15, no. 16 (2022): 5549. http://dx.doi.org/10.3390/ma15165549.

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The strengths and mechanical characteristics of concrete play a key role in the safety levels for the recovery and reuse of existing RC buildings and civil engineering works. This is one of the main focuses of the current research trend. To this aim, the characteristics of concrete must be investigated: the characterization of the concrete and its in situ conditions play a key role. For these reasons, many studies on in situ and laboratory test methods and procedures have been carried out over the last two decades. In the past few years, non-destructive investigation methods have been consider

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Clarke, Evan M., Hunter B. Henderson, Eric S. Elton, et al. "Investigation of In Situ and Ex Situ Passivation of Pyrophoric Uranium–Niobium Alloy Powder." Applied Sciences 15, no. 12 (2025): 6431. https://doi.org/10.3390/app15126431.

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This work evaluates the effectiveness of in situ and ex situ passivation methods for mitigating the pyrophoricity of uranium–6 wt.% niobium spherical powders produced via the hydride–dehydride process coupled with plasma spheroidization. Oxide layer thickness was characterized using STEM/EDX, and pyrophoricity was assessed by a UN-recommended test method, which involves directly dropping the powders in the air. In situ passivation, performed by introducing flowing oxygen during spheroidization, produced oxide layers ranging from tens to hundreds of nanometers but resulted in inconsistent pyrop

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Bondareva, Liudmyla, Ivan ZIMENKO, and Kostiantyn BONDAREV. "Interpretation of the data of modern methods of field soil research." Bases and Foundations, no. 48 (June 28, 2024): 61–74. http://dx.doi.org/10.32347/0475-1132.48.2024.61-74.

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This study examines modern in-situ testing methods for soils; it investigates the impact of interpreting these methods on the calculated strength and deformation parameters of soils and compares them with tabulated values according to the DSTU (Standard of Ukraine). In today's world, there is an urgent need for accurate and prompt soil investigations, which are crucial for design and construction. Although laboratory methods are reliable, they often require significant time and resources. The advantage of in-situ methods lies in the fact that testing is performed directly in the soil mass, mea

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Zhang, Min, and Tao Qiu. "Research on Test Method of Foundation Bed Coefficient in Nanjing Soft Soil Area." Geofluids 2021 (November 30, 2021): 1–8. http://dx.doi.org/10.1155/2021/9932619.

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Relying on the geotechnical engineering survey project of Nanjing Lukou Airport, this research adopts the method of combining in situ and indoor testing to analyze the coefficient of soil foundation under different conditions (flow plastic, plastic, and soft plastic). Based on the differences in test results, in situ and indoor test methods appropriate for the benchmark bed coefficient of Nanjing soft soil area are proposed. Research findings depicted that the bed coefficients obtained by different methods are not similar; therefore, if the data obtained by different methods need to be compare

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Balan., K., Fasil Fathima, and Nair.S Resmi. "Design of Load Carrying Capacity of Pile–A Critical Approach." Journal of Earthquake Science and Soil Dynamics Engineering 4, no. 1 (2021): 1–5. https://doi.org/10.5281/zenodo.4736994.

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Piles are provided to carry large loads coming from superstructures to the soil. During pile installation resistance developed either at the pile tip or along the surface of the pile. Based on that the piles are classified as either end bearing piles or friction piles. As per Indian Standards bored cast in-situ piles are designed using the methods taken from IS 2911 (part 1/sec 2): 2010. Ultimate load carrying capacity of pile can also be computed from the equation suggested by Mayerhof. Vesic’s equation is helpful for the analysis of laterally loaded piles. The result thus obtained from

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Li, Zhao Yan, Wei Ming Wang, Yu Run Li, and Long Wei Chen. "Study on In Situ Test Based on Survey of Bachu Earthquake." Applied Mechanics and Materials 238 (November 2012): 852–55. http://dx.doi.org/10.4028/www.scientific.net/amm.238.852.

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Based on survey of the Bachu-Jiashi earthquake liquefaction sites, much new basic liquefaction information were obtained and China’s liquefaction database was enriched. A detailed investigation of the Bachu earthquake liquefaction site was conducted, in which three kinds of in situ test measures were used to obtain the site information, and given China mainland SPT data of liquefaction site increase by 40%. By site investigation, international standard liquefaction site CPT data were obtained, and also, the first measurement of liquefaction site data by SPT and CPT index was conducted. With th

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Feng, Jing, Qian Sheng, Chao Wen Luo, and Jing Zeng. "The Application of Hydraulic Fracturing in Storage Projects of Liquefied Petroleum Gas." Key Engineering Materials 306-308 (March 2006): 1509–14. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1509.

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It is very important to study the pristine stress field in Civil, Mining, Petroleum engineering as well as in Geology, Geophysics, and Seismology. There are various methods of determination of in-situ stress in rock mass. However, hydraulic fracturing techniques is the most convenient method to determine and interpret the test results. Based on an hydraulic fracturing stress measurement campaign at an underground liquefied petroleum gas storage project which locates in ZhuHai, China, this paper briefly describes the various uses of stress measurement, details of hydraulic fracturing test syste

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Yoshida, Yoshinori, and Asuka Kutsukake. "Automatic Identification of Critical Damage Value with In-situ Shearing Test and Notched Plate Tensile Test with Image Analysis." MATEC Web of Conferences 408 (2025): 02038. https://doi.org/10.1051/matecconf/202540802038.

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Critical damage values in Cockcroft and Latham's and Ayada's models are automatically identified using autonomous-driven finite element analysis (ADFEA). To validate fracture behavior, we perform in-situ shearing and tensile tests on notched steel plates, employing image analysis. In ADFEA, a machine-learning-based optimization algorithm searches for critical damage values by minimizing the error between simulated and experimental fracture test results. The dependence of critical damage value identification on the testing method is demonstrated, and the effectiveness of fracture prediction the

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Zhang, Yuezheng, Hongguang Ji, and Hanhua Xu. "Study on the Law of Rock Anelastic Recovery and the Characteristics of In Situ Stress Field of 2000 m Deep Stratum in Metal Mines of Coastal Area." Advances in Materials Science and Engineering 2022 (April 12, 2022): 1–11. http://dx.doi.org/10.1155/2022/2152814.

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In situ stress field in deep strata is dominated by self-weight stress and tectonic stress, which is the dynamic source of a series of mining dynamic disasters such as rock burst, mine earthquake, and collapse. To develop deep resources and build deep engineering construction, the distribution characteristics of the in situ stress field must first be ascertained, so as to provide a basic basis for the engineering surrounding rock support design and disaster risk prevention and control. In this paper, taking the Sanshandao Gold Mine in the coastal area as the engineering background, in the earl

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Larsson, Rolf L. "Calculation of Settlements of Shallow Foundations on Sand and Silt Based on In Situ Test Results." Transportation Research Record: Journal of the Transportation Research Board 1614, no. 1 (1998): 15–23. http://dx.doi.org/10.3141/1614-03.

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Calculations of settlements of foundations on sand and silt are often made with methods that do not take into account the curved load-settlement relations. With reasonable accuracy, these methods can be used to calculate settlements only for the “normal” ground pressures for which they have been elaborated. For lower ground pressures the settlements become overestimated and for higher pressures they become increasingly underestimated. However, new design rules often contain varying demands for acceptable settlements depending on the type of structure. The failure criteria for bearing capacity

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E, Nishma, and Amna K. Sonu. "Evaluation of Bearing Capacity for Cast In-Situ Bored Piles." International Journal for Research in Applied Science and Engineering Technology 11, no. 4 (2023): 4481–89. http://dx.doi.org/10.22214/ijraset.2023.51306.

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Abstract: Pile is a structural element constructed to overcome heavy loads from super structure, when proper bearing strata is not available at shallow depth. The prediction of bearing capacity of a bored cast in-situ pile is a complex problem, as it depends on installation method, concrete quality, ground condition and pile geometry. It is considered that the reliable method for finding bearing capacity is pile load test, which is time consuming and costly. The bearing capacity can also be analysed by empirical and analytical methods using soil data and SPT data. In this paper, empirical meth

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Wen, Yong, Guanghua Yang, and Zhihui Zhong. "Study on Calculation Method of Foundation Nonlinear Settlement Based on In Situ Loading Test." Geofluids 2023 (February 2, 2023): 1–9. http://dx.doi.org/10.1155/2023/7845944.

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In this paper, a nonlinear deformation modulus method is proposed for foundation settlement calculation. In the proposed method, the nonlinear deformation modulus under different stress levels is obtained from the load-settlement curve of in situ loading test, which are then applied to the layerwise summation method for calculating foundation settlement. On this basis and referring to the Duncan-Chang model, a variable modulus constitutive model suitable for numerical calculation of foundation settlement is further proposed. The required parameters of this model are the same as those of the no

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Gustavvson, Jan. "Air Filters for Ventilating Systems — Laboratory and in Situ Testing." International Nonwovens Journal os-8, no. 2 (1999): 1558925099OS—80. http://dx.doi.org/10.1177/1558925099os-800214.

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Over the past few decades, many laboratory test methods have been developed to measure and characterize air filters using different synthetic dusts. Today, with concern about indoor air quality (IAQ) and air pollution on the rise, new standards are being developed to test the ability of air filters to remove particles in the laboratory as well as in situ. Still, laboratory tests that use coarse dusts can give very misleading results, and the rated efficiency for a filter can decrease dramatically in real-world applications. For better understanding and prevention of IAQ problems, test methods

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An, Yan Yong, and Bao Tian Wang. "Experimental Research on Determining the Geotechnical Parameters with CPTU Methods." Advanced Materials Research 250-253 (May 2011): 1798–803. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1798.

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Cone penetration test is a fast and efficient in-situ test technique. With the development of sensor technology and the use of new probes, such test is employed in more fields and reveals more soil parameters. Based on the advanced CPTU equipment, porewater pressure dissipation processes were measured at different depths, dissipation characteristics of the sandy soil and cohesive soil were analyzed respectively; Then, consolidation and permeability coefficients of the cohesive soil were calculated, the results are close to the laboratory test results. Undrained shear strength of soft clay were

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Pineau, S., Y. Lefèvre, I. Dupont, et al. "In Situ Simulation of Accelerated Corrosion in French Marine Ports." Materials Performance 47, no. 10 (2008): 32–36. https://doi.org/10.5006/mp2008_47_10-32.

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An in situ experimentation system was developed and used in three French ports to research accelerated marine corrosion phenomena and microbiologically influenced corrosion. The test system simulated accelerated marine corrosion using modern methods for corrosion deposit characterization and microbiologic studies.

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Diaz-Segura, Edgar Giovanny. "Assessment of the range of variation of Nγ from 60 estimation methods for footings on sand". Canadian Geotechnical Journal 50, № 7 (2013): 793–800. http://dx.doi.org/10.1139/cgj-2012-0426.

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The range of variation of the bearing capacity factor, Nγ, was assessed using 60 estimation methods for rough footings on sand subjected to static vertical loading. The influence on the Nγ values of the use of correlations for the estimation of the friction angle, [Formula: see text], derived from in situ tests was also assessed. The analysis shows a marked dependency on the methods used to determine Nγ, showing differences for the same [Formula: see text] values of up to 267% between estimated values. Uncertainty in the estimation of [Formula: see text], due to the use of correlations with in

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