Distribution of pile-soil stress in centrifugal modelling of composite foundation

JIANG Yan-bin; HE Ning; HE Bin; WANG Zhang-chun; ZHANG Zhong-liu; ZHU Rui

doi:10.11779/CJGE2020S1017

Volume 42 Issue S1

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Chinese Journal of Geotechnical Engineering > 2020 > 42(S1): 85-89. > DOI: 10.11779/CJGE2020S1017

JIANG Yan-bin, HE Ning, HE Bin, WANG Zhang-chun, ZHANG Zhong-liu, ZHU Rui. Distribution of pile-soil stress in centrifugal modelling of composite foundation[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 85-89. DOI: 10.11779/CJGE2020S1017

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Distribution of pile-soil stress in centrifugal modelling of composite foundation

1.
School of Architectural Engineering, Jinling Institute of Technology, Nanjing 211169, China
2.
Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China

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Received Date: June 04, 2020
Available Online: December 07, 2022

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Abstract

Abstract

Based on the centrifugal modelling of PCC pile-supported and geosynthetic-reinforced embankments and the three-dimensional finite element numerical model, the test methods for vertical earth pressure and stress distribution rules of pile-soil in composite foundation are discussed. The results show that the calibration medium has an obvious influence on the coefficient of the earth pressure cells. In the range of single pile reinforced area, the distribution of vertical earth pressure at the top of pile cap and its surrounding soil is uneven. The centroid measuring points of the cap-top and the subsoil top are in the low-stress area and high-stress area, respectively. It is reasonable to calculate the average vertical earth pressure on the pile cap according to the measured force at the top of the pile. Statistics show that the average vertical stress of pile and soil cannot be characterized by the soil pressure obtained from the limited measuring points which are not fully representative.

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[1]	LIU H L, NG C W W, FEI K. Performance of a geogrid-reinforced and pile-supported highway embankment over soft clay: case study[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(12): 1483-1493. doi: 10.1061/(ASCE)1090-0241(2007)133:12(1483)
[2]	娄炎, 何宁, 娄斌. 高速公路深厚软基工后沉降控制成套技术[M]. 北京: 人民交通出版社, 2011: 91-104. LOU Yan, HE Ning, LOU Bin. Complete Settlement Control Technology for Deep Soft Foundation of Expressway[M]. Beijing: China Communications Press, 2011: 91-104. (in Chinese)
[3]	龚晓南. 复合地基理论及工程应用[M]. 2版.北京: 中国建筑工业出版社, 2007: 57-70. GONG Xiao-nan, Composite Foundation Theory and Engineering Application[M]. 2nd ed. Beijing: China Architecture and Building Press, 2007: 57-70. (in Chinese)
[4]	姜彦彬, 何宁, 林志强, 等. 路堤深厚软基管桩复合地基数值模拟[J]. 水利水运工程学报, 2018(2): 43-51. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201802006.htm JIANG Yan-bin, HE Ning, LIN Zhi-qing, et al. Numerical Study on Pipe Pile Composite Foundation of Deep Soft Foundation Under Embankment[M]. Hydro-science and Engineering, 2018(2): 43-51. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY201802006.htm
[5]	YE G B, ZHANG Q W, ZHANG Z, et al. Centrifugal modeling of a composite foundation combined with soil-cement columns and prefabricated vertical drains[J]. Soils and Foundations, 2015, 55(5): 1259-1269. doi: 10.1016/j.sandf.2015.09.024
[6]	刘飞成, 张建经. 斜坡基底软土桩-网复合地基变形特性离心试验研究[J]. 岩石力学与工程学报, 2018, 37(1): 209-219. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201801021.htm LIU Fei-cheng, ZHANG Jian-jing. Centrifuge test on deformation characteristics of pile-geogrid composite foundation in soft soil under slope[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(1): 209-219. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201801021.htm
[7]	姜彦彬, 何宁, 耿之周, 等. PCC桩复合地基离心模型制备及桩土接触模拟[J]. 水利水运工程学报, 2020(2): 91-98. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY202002013.htm JIANG Yan-bin, HE Ning, GENG Zhi-zhou, et al. Simulating the PCC pile composite foundation for centrifuge modelling and pile-soil interaction[J]. Hydro-Science and Engineering, 2020(2): 91-98. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY202002013.htm
[8]	姜彦彬, 何宁, 许滨华, 等. 桩承式加筋路堤有限元几何建模方法及边坡效应研究[J]. 水利水运工程学报, 2020(1): 84-91. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY202001011.htm JIANG Yan-bin, HE Ning, XU Bin-hua, et al. Geometrical modelling with finite element method and slope effect of geosynthetic reinforced and pile-supported embankments[J]. Hydro-science and Engineering, 2020(1): 84-91. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSY202001011.htm
[9]	李连祥, 符庆宏, 张海平. 微型土压力传感器标定方法研究[J]. 地震工程学报, 2017, 39(4): 731-737. doi: 10.3969/j.issn.1000-0844.2017.04.0731 LI Lian-xiang, FU Qing-hong, ZHANG Hai-ping. Study on the calibration method of micro earth pressure sensors[J]. China Earthquake Engineering Journal, 2017, 39(4): 731-737. (in Chinese) doi: 10.3969/j.issn.1000-0844.2017.04.0731
[10]	徐光明, 陈爱忠, 曾友金, 等. 超重力场中界面土压力的测量[J]. 岩土力学, 2007, 28(12): 2671-2674. doi: 10.3969/j.issn.1000-7598.2007.12.037 XU Guang-ming, CHEN Ai-zhong, ZENG You-jin, et al. Measurement of boundary total stress in a multi-gravity environment[J]. Rock and Soil Mechanics, 2007, 28(12): 2671-2674. (in Chinese) doi: 10.3969/j.issn.1000-7598.2007.12.037
[11]	郑俊杰, 张军, 马强, 等. 路桥过渡段桩承式加筋路堤现场试验研究[J]. 岩土工程学报, 2012, 34(2): 355-362. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201202030.htm ZHENG Jun-jie, ZHANG Jun, MA Qiang, et al. Experimental investigation of geogrid-reinforced and pile-supported embankment at bridge approach[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(2): 355-362. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201202030.htm
[12]	CHEN R P, XU Z Z, CHEN Y M. Field tests on pile-supported embankments over soft ground[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 136(6): 777-785.
[13]	BRIANÇON L, SIMON B. Performance of pile-supported embankment over soft soil: full-scale experiment[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2012, 138(4): 551-561.
[14]	LIU H L, KONG G Q, CHU J, et al. Grouted gravel column-supported highway embankment over soft clay: case study[J]. Canadian Geotechnical Journal, 2015, 52(11): 1725-33.
[15]	ZHOU M, LIU H L, CHEN Y M, et al. First application of cast-in-place concrete large-diameter pipe (PCC) pile-reinforced railway foundation: a field study[J]. Canadian Geotechnical Journal, 2016, 53(4): 708-716.
[16]	CHENG Q G, WU J J, ZHANG D X, et al. Field testing of geosynthetic-reinforced and column-supported earth platforms constructed on soft soil[J]. Frontiers of Structural and Civil Engineering, 2014, 8(2): 124-139.
[17]	CAO W Z, ZHENG J J, ZHANG J, et al. Field test of a geogrid-reinforced and floating pile-supported embankment[J]. Geosynthetics International, 2016, 23(5): 348-361.