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

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外文摘要：This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay ground.Labora-tory model test and numerical simulation are conducted to study the system behavior upon excavation.The horizontal displacement(δh),Von Mises stress(σM),strain(ε),ground surface settlement(δv),and earth pressure are systematically investigated.Furthermore,the monitoring data of 13 excavation cases supported by double-row piles retaining system are presented and discussed.The experimental results can basically match the numerical results,and the maximum σM,maximum bending moment(Mmax),maximum horizontal dis-placement(δhm)of structural members are all less than the tolerance limits.The 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 zone.The δhm val-ues are 0.07％-1.42％of the excavation depth(He).The maximum ground surface settlement(δvm)is generally less than δhm.The ratio ofδvm/δhm varies between 0.09 and 0.76,with an average value of 0.5.The observed earth pressure on the retained side of front pile(paf)is about 0.53-0.57 γH below the excavation surface.Above the excavation surface,paf decreases dramatically when getting closer to the ground surface.

外文关键词：

Prefabricated recyclable structureDouble-row piles retaining systemPhysical model testNumerical simulationDeformation

作者：

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

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作者单位：

School of Civil Engineering,Sun Yat-sen University,Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Guangdong Key Laboratory of Oceanic Civil Engineering,Guangdong Research Center for Underground Space Exploitation Technology,Zhuhai 519082,China

Beijing Urban Rail Transit Construction Engineering Co.,Ltd,Beijing 100088,China

State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China

BeSTDR Infrastucture Hospital,Zhumadian 463400,China

School of Architecture and Civil Engineering,Huizhou University,Huizhou 516008,China

Guangzhou Municipal Construction Group Co.,Ltd,Guangzhou 510275,China

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基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGuangdong Basic and Applied Basic ResearchFoundation,ChinaOpen Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,ChiScience and Technology Program of Guangzhou Municipal Construction Group Co.,Ltd.,China

项目编号：

2021YFC310080352208380520785062023A1515012159SKLGME0210222022-KJ004

出版年：

2023

DOI：

10.1016/j.undsp.2023.05.004

地下空间(英文)

CSCD

ISSN：2096-2754

年,卷(期)：2023.(6)

参考文献量5