| 交通荷载及其对紧邻基坑支护结构影响的现场实测分析 |
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| 引用本文： | 张兴周,陈江,万励,罗文俊,徐长节.交通荷载及其对紧邻基坑支护结构影响的现场实测分析[J].西北地震学报,2020,42(2):490-497. |
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| 作者姓名： | 张兴周 陈江 万励 罗文俊 徐长节 |
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| 作者单位： | 浙江交工集团股份有限公司, 浙江 杭州 310000;浙江省交通投资集团有限公司, 浙江 杭州 310000;浙江大学滨海和城市岩土工程研究中心, 浙江 杭州 310000;江西省岩土工程基础设施安全与控制重点实验室, 江西 南昌 330013;华东交通大学土木工程学院, 江西 南昌 330013;浙江大学滨海和城市岩土工程研究中心, 浙江 杭州 310000;江西省岩土工程基础设施安全与控制重点实验室, 江西 南昌 330013;华东交通大学土木工程学院, 江西 南昌 330013;浙江省城市地下空间开发工程技术研究中心, 浙江 杭州 310000 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）（2015CB057801）；国家杰出青年科学基金项目（51725802）；国家自然科学基金项目（51878276）；江西省落地计划成果转化项目（KJLD4036） |
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| 摘 要： | 目前对交通荷载对深基坑围护结构的影响研究尚处于起步阶段。本文通过对某深基坑工程交通荷载以及交通荷载作用下深基坑围护结构振动加速度及桩后动土压力的现场实测研究,给出了坑边车辆荷载计算经验公式,并分析了车辆荷载大小、行驶速度等因素对基坑围护结构振动特性及动土压力的影响规律。结果表明:在地表面处,车辆荷载产生的振动以竖直向为主;车辆荷载的大小将直接影响围护结构振动加速度幅值及动土压力大小;车辆行驶速度不同,车辆振动产生的峰值加速度和土体惯性力也不同,从而使得基坑围护结构桩后动土压力也不同,车辆行驶速度越大,基坑围护结构振动峰值加速度及动土压力也越大;车辆交通荷载对基坑围护结构的影响将随着距离的增加而衰减。研究所得结果可供相关基坑工程设计施工参考。
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| 关 键 词： | 交通荷载 基坑 振动加速度 动土压力 |
| 收稿时间： | 2018/9/8 0:00:00 |
Field Test and Analysis of Vehicle Load and Its Influence on theRetaining Structure of Adjacent Foundation Pits |
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| ZHANG Xingzhou,CHEN Jiang,WAN Li,LUO Wenjun,XU Changjie.Field Test and Analysis of Vehicle Load and Its Influence on theRetaining Structure of Adjacent Foundation Pits[J].Northwestern Seismological Journal,2020,42(2):490-497. |
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| Authors: | ZHANG Xingzhou CHEN Jiang WAN Li LUO Wenjun XU Changjie |
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| Institution: | Zhejiang Communications Construction Group Co., Ltd, Hangzhou 310000, Zhejiang, China;Zhejiang Communications Investment Group Co., Ltd, Hangzhou 310000, Zhejiang, China;Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310000, Zhejiang, China;Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, Nanchang 330013, Jiangxi, China;School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China; Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310000, Zhejiang, China;Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, Nanchang 330013, Jiangxi, China;School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China;Engineering Research Center of Urban Underground Development of Zhejiang Province, Hangzhou 310000, Zhejiang, China |
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| Abstract: | Currently,research into vehicle loads’influence on support structures of foundation pits is still at an initial stage.Through field measurements of vehicle load and vibration acceleration of foundation pits’retaining structures,as well as dynamic earth pressure of a retaining pile following the action of vehicle load.Empirical formulas for the calculation of vehicle load on adjacent foundation pits were obtained,and the influence of vehicle load and vehicle speed on the vibration characteristics of retaining structures and dynamic earth pressure were analyzed.Results showed that vertical vibration gives priority to the vibration induced by vehicle load at the ground surface.Vehicle load directly influences the amplitude of the vibration acceleration of both the foundation pit retaining structure and the dynamic earth pressure.Vehicle speed also has an effect on the peak acceleration induced by vehicle vibration,and higher speed will lead to larger peak vibration acceleration and dynamic earth pressure.However,the influence of vehicle load will decrease with increasing distance.These results can provide a reference for design and construction of relevant foundation pit projects. |
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| Keywords: | vehicle load foundation pit vibration acceleration dynamic earth pressure |
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