复合格宾土工格栅加筋土挡墙模型振动台试验  

Shaking table test on the model of reinforced soil retaining wall with composite Gabion and geogrid

作　　者：蔡晓光 王学鹏[1] 李思汉 黄鑫 路彤 徐洪路 CAI Xiao-guang;WANG Xue-peng;LI Si-han;HUANG Xin;LU Tong;XU Hong-lu(College of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,China;Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment,Sanhe 065201,China;Key Laboratory of Building Damage Mechanism and Defense,China Earthquake Administration,Sanhe 065201,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Tangshan Earthquake Monitoring Center Station of Hebei Earthquake Agency,Tangshan 063000,China)

机构地区：[1]防灾科技学院地质工程学院,河北三河065201 [2]河北省地震灾害防御与风险评价重点实验室,河北三河065201 [3]中国地震局建筑物破坏机理与防御重点实验室,河北三河065201 [4]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [5]河北省地震局唐山地震监测中心站,河北唐山063000

出　　处：《振动工程学报》2023年第3期767-775,共9页Journal of Vibration Engineering

基　　金：地震科技星火项目(XH204402);中央高校基本科研业务费专题项目(ZY20215107);廊坊市科技支撑计划项目(2021013172)。

摘　　要：复合格宾土工格栅加筋土挡墙已被广泛应用于公路、铁路工程。为探究复合格宾土工格栅加筋土挡墙的动力响应,开展了复合格宾土工格栅加筋土挡墙振动台模型试验,研究在地震荷载作用下挡墙的加速度放大系数、竖向沉降、水平位移等动力特性。试验结果表明:当地震动峰值加速度为0.8g时,挡墙处于整体稳定状态;加速度在墙后填土中沿墙高呈现非线性增大的趋势,与《公路工程抗震设计规范》中规定的趋势一致;顶部竖向沉降最大值为3.48 mm,沉降墙高比为0.174%,远小于美国AASHTO规范的2%限值;随着输入地震动时程峰值的增大,挡墙水平位移沿墙高逐渐增加,墙体变形模式由转动为主过渡到平移、转动耦合,地震永久位移达到了墙高的1.06%。The composite Gabion and geogrid reinforced soil retaining wall(GGRSRW)has been widely used in highway and railroad projects.Shaking table test of GGRSRW are carried out to analyse actual dynamic responses.The dynamic characteristics such as acceleration amplification factor,vertical settlement and horizontal displacement of the retaining wall under seismic load are studied.The results show that the retaining wall is in an overall stable state when the peak value of input acceleration is 0.8g.The acceleration amplification factor increases nonlinearly along the wall height ranges from 1.54 to 1.97,which is similar to the trend of the specifications of seismic design for highway engineering.The maximum vertical settlement of the model is 3.48 mm.The ratio of the settlement to height is 0.174%,which is far less than the 2%limit of the American AASHTO standard.As the input ground motion increases,the horizontal displacement of the retaining wall gradually increases along the wall height.The wall deformation mode changes from rotation to translation and rotation coupling.The total residual displacement reaches 1.06%of the wall height.

关 键 词：复合格宾土工格栅加筋土挡墙 振动台试验 加速度放大系数 竖向沉降 水平位移 

分 类 号：U417.11[交通运输工程—道路与铁道工程]