Model test and numerical simulation of a new prefabricated double-row piles retaining system in silty clay ground

作     者：Ruisong Wang Hao Yang Pengpeng Ni Chenyang Zhao Chengchao Guo Huihuan Ma Pu Dong Huqing Liang Mengxiong Tang 

作者机构：School of Civil EngineeringSun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Guangdong Key Laboratory of Oceanic Civil EngineeringGuangdong Research Center for Underground Space Exploitation TechnologyZhuhai 519082China Beijing Urban Rail Transit Construction Engineering Co.LtdBeijing 100088China BeSTDR Infrastucture HospitalZhumadian 463400China School of Architecture and Civil EngineeringHuizhou UniversityHuizhou 516008China Guangzhou Municipal Construction Group Co.LtdGuangzhou 510275China State Key Laboratory of Geomechanics and Geotechnical EngineeringInstitute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China 

出 版 物：《Underground Space》 (地下空间（英文）)

年 卷 期：2023年第13卷第6期

页      面：262-280页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：supported by the National Key Research and Development Program of China(Grant No.2021YFC3100803) the National Natural Science Founda tion of China(Grant Nos.52208380 and 52078506) the Guangdong Basic and Applied Basic ResearchFoundation,China(Grant No.2023A1515012159) Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences(Grant No.SKLGME021022) the Science and Technology Program of Guangzhou Municipal Construction Group Co.,Ltd.,China(Grant No.2022-KJ004) 

主　　题：Prefabricated recyclable structure Double-row piles retaining system Physical model test Numerical simulation Deformation 

摘      要：This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay *** model test and numerical simulation are conducted to study the system behavior upon *** horizontal displacement(δ_(h)),Von Mises stress(δ_(M)),strain(ε),ground surface settlement(δ_(v)),and earth pressure are systematically ***,the monitoring data of 13 excavation cases supported by double-row piles retaining system are presented and *** experimental results can basically match the numerical results,and the maximumδ_(M),maximum bending moment(M_(max)),maximum horizontal displacement(δ_(hm))of structural members are all less than the tolerance *** ground surface settlement model of double-row piles retaining system consists of three zones,i.e.,rebound influence zone,primary influence zone and secondary influence *** dhm values are 0.07%–1.42%of the excavation depth(He).The maximum ground surface settlement(δ_(vm))is generally less than *** ratio ofδ_(vm)=δ_(hm)varies between 0.09 and 0.76,with an average value of *** observed earth pressure on the retained side of front pile(paf)is about 0.53–0.57γH below the excavation *** the excavation surface,p_(af)decreases dramatically when getting closer to the ground surface.