Refined value of lateral resistance coefficient of pile foundation in soft soil areas

ZHANG Jun-yun; ZHANG Le; FENG Jun

doi:10.11779/CJGE2021S2048

Volume 43 Issue S2

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Chinese Journal of Geotechnical Engineering > 2021 > 43(S2): 202-207. > DOI: 10.11779/CJGE2021S2048

ZHANG Jun-yun, ZHANG Le, FENG Jun. Refined value of lateral resistance coefficient of pile foundation in soft soil areas[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 202-207. DOI: 10.11779/CJGE2021S2048

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Refined value of lateral resistance coefficient of pile foundation in soft soil areas

School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

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Received Date: August 14, 2021
Available Online: December 05, 2022

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Abstract

Abstract

The m method is a common method to analyze the deformation and internal force of laterally loaded piles. In the absence of test piles, the ratio coefficient m value of lateral resistance coefficient in the m method can only be taken from a wide range recommended by the relevant code according to the type of foundation soil, etc., highly dependent on engineering experience and random. Main soft soils along Shanghai-Nantong Railway are classified into 11 subcategories according to the compression characteristics. The influences of horizontal force H, horizontal displacement $Y_{0}$ $Y_{0}$ of mud surface (pile top), pile diameter D and soil compression index $C_{c}$ $C_{c}$ on m value are analyzed through the numerical test method. The fitting relation between m and $C_{c}$ $C_{c}$ and the relation between m and $Y_{0}$ $Y_{0}$ are established through statistical analysis, and are verified by the field horizontal static load tests. The results show that the m value decreases with H, $Y_{0}$ $Y_{0}$ and $C_{c}$ $C_{c}$ , and the attenuation speed decreases continuously. D has a certain influence on the m value, corresponding to the best diameter of pile D=1.25 m. The fitting formula for m value corrected by the field tests is reliable and can be fine-tuned according to the deformation parameters of soils.
- soft soil area,
- pile foundation,
- m value,
- refined value,
- fitting formula

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[1]	姚文娟, 吴怀睿, 程泽坤, 等. 基于p-y曲线法的超长桩非线性数值分析[J]. 岩土工程学报, 2011, 33(11): 1683-1690. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201111009.htm YAO Wen-juan, WU Huai-rui, CHENG Ze-kun, et al. Nonlinear numerical analysis of super-long piles based on p-y curves[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(11): 1683-1690. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201111009.htm
[2]	RAO S N, RAMAKRISHNA V G S T, RAO M B. Influence of rigidity on laterally loaded pile groups in marine clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 1998, 124(6): 542-549. doi: 10.1061/(ASCE)1090-0241(1998)124:6(542)
[3]	LI Wei, CHEN Fa-bo, XU Xue-yong, et al. Comparative study of pile-soil interaction analysis methods[J]. Applied Mechanics and Materials, 2012, 170/171/172/173: 246-251.
[4]	WANG J P, SU J B, WU F, et al. Lateral dynamic load tests of offshore piles based using the m-method[J]. Ocean Engineering, 2021, 220: 108413. doi: 10.1016/j.oceaneng.2020.108413
[5]	刘陕南, 侯胜男, 蔡忠祥. m法计算单桩水平承载力在上海地区的适用性分析[J]. 岩土工程学报, 2013, 35(增刊2): 721-724. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2013S2132.htm LIU Shan-nan, HOU Sheng-nan, CAI Zhong-xiang. Applicability of m-method for horizontal bearing capacity of single pile in Shanghai area[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 721-724. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2013S2132.htm
[6]	戴自航, 陈林靖. 多层地基中水平荷载桩计算m法的两种数值解[J]. 岩土工程学报, 2007, 29(5): 690-696. doi: 10.3321/j.issn:1000-4548.2007.05.010 DAI Zi-hang, CHEN Lin-jing. Two numerical solutions of laterally loaded piles installed in multi-layered soils by m method[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(5): 690-696. (in Chinese) doi: 10.3321/j.issn:1000-4548.2007.05.010
[7]	劳伟康, 周治国, 周立运. 水平推力桩在大位移情况下m值的确定[J]. 岩土力学, 2008, 29(1): 192-196. doi: 10.3969/j.issn.1000-7598.2008.01.036 LAO Wei-kang, ZHOU Zhi-guo, ZHOU Li-yun. Analysis of m value for lateral loaded pile under large deflection[J]. Rock and Soil Mechanics, 2008, 29(1): 192-196. (in Chinese) doi: 10.3969/j.issn.1000-7598.2008.01.036
[8]	吴锋, 时蓓玲, 卓杨. 水平受荷桩非线性m法研究[J]. 岩土工程学报, 2009, 31(9): 1398-1401. doi: 10.3321/j.issn:1000-4548.2009.09.012 WU Feng, SHI Bei-ling, ZHUO Yang. Nonlinear m method for piles under lateral load[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(9): 1398-1401. (in Chinese) doi: 10.3321/j.issn:1000-4548.2009.09.012
[9]	戴自航, 王云凤, 卢才金. 水平荷载单桩计算的综合刚度和双参数法杆系有限元数值解[J]. 岩石力学与工程学报, 2016, 35(10): 2115-2123. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201610018.htm DAI Zi-hang, WANG Yun-feng, LU Cai-jin. Numerical solution of link finite element based on composite stiffness and bi-parameter method for computation of laterally loaded single pile[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(10): 2115-2123. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201610018.htm
[10]	邓涛, 林聪煜, 柳志鹏, 等. 大位移条件下水平受荷单桩的简明弹塑性计算方法[J]. 岩土力学, 2020, 41(1): 95-102. DENG Tao, LIN Cong-yu, LIU Zhi-peng, et al. A simplified elastoplastic method for laterally loaded single pile with large displacement[J]. Rock and Soil Mechanics, 2020, 41(1): 95-102. (in Chinese)
[11]	YU G M, GONG W M, LIU Y C, et al. Lateral capacity of pile with grouted upper soil: field test and numerical simulation[J]. Innovative Infrastructure Solutions, 2017, 3(1): 1-9.
[12]	冯君, 张俊云, 朱明, 等. 软土地层高承台桥梁群桩基础横向承载特性研究[J]. 岩土力学, 2016, 37(增刊2): 94-104. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2016S2011.htm FENG Jun, ZHANG Jun-yun, ZHU Ming, et al. Characteristic study of horizontal bearing capacity and pile group effect coefficient of laterally loaded high pile group foundation for bridge in soft soil[J]. Rock and Soil Mechanics, 2016, 37(S2): 94-104. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2016S2011.htm
[13]	KARTHIGEYAN S, RAMAKRISHNA V V G S T, RAJAGOPAL K. Influence of vertical load on the lateral response of piles in sand[J]. Computers and Geotechnics, 2006, 33(2): 121-131. doi: 10.1016/j.compgeo.2005.12.002
[14]	KIM Y, JEONG S. Analysis of soil resistance on laterally loaded piles based on 3D soil-pile interaction[J]. Computers and Geotechnics, 2011, 38(2): 248-257. doi: 10.1016/j.compgeo.2010.12.001
[15]	陈建峰, 孙红, 石振明, 等. 修正剑桥渗流耦合模型参数的估计[J]. 同济大学学报(自然科学版), 2003, 31(5): 544-548. https://www.cnki.com.cn/Article/CJFDTOTAL-TJDZ200305008.htm CHEN Jian-feng, SUN Hong, SHI Zhen-ming, et al. Estimation of parameters of modified cam-clay model coupling Biot theory[J]. Journal of Tongji University, 2003, 31(5): 544-548. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TJDZ200305008.htm
[16]	铁路工程基桩检测技术规程：TB 10218—2008[S]. 2008. Technical Specification for Testing of Railway Piles: TB 10218—2008[S]. 2008. (in Chinese)
[17]	铁路桥涵地基和基础设计规范：TB 10093—2017[S]. 2017. Code for Design on Subsoil and Foundation of Railway Bridge and Culvert: TB 10093—2017[S]. 2017. (in Chinese)