加筋格宾挡墙在重复荷载作用下动变形特性试验研究  

TEST STUDY ON DYNAMIC DEFORMATION BEHAVIOR OF REINFORCED GABION RETAINING WALL UNDER CYCLIC LOAD

作　　者：林宇亮[1] 杨果林[1] 李昀[1] 黄向京[1,2] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]湖南省交通规划勘察设计院,湖南长沙410011

出　　处：《岩石力学与工程学报》2009年第A02期4027-4033,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：湖南省科技厅资助项目(06ck3030);湖南省交通厅资助项目(200612)

摘　　要：为研究加筋格宾挡墙变形特性,对加筋格宾挡墙进行重复荷载作用下的模型试验,得出5种频率(2,4,6,8,10Hz)、3种振幅(40～80,50～100,60～120kPa)的动载作用下加筋格宾挡墙面墙累计侧向变形和竖向变形(沉降)的变化规律,以及影响面墙动变形特性的主要因素及其显著性;并对分级卸载时面墙的变形特性也进行分析研究。结果表明:挡墙动变形特性受振动次数、动荷载幅值以及格宾笼填充率等因素的影响,振动频率影响不显著;挡墙较大侧向变形发生在第3～5层;随着动荷载幅值的增大,达到变形稳定所需的振动次数增加,变形值亦增大;动变形的发展随振动历时的增长而增大,初期增长较快,随后逐渐变缓;分级卸载过程中,面墙侧向变形几乎没有弹性恢复。In order to study the deformation behavior of reinforced gabion retaining wall,model test is carried out.The cyclic loads with five frequencies（2,4,6,8,10 Hz） and three amplitudes（40-80,50-100,60-120 kPa） are imposed.According to the test,the dynamic deformation behavior（both lateral and vertical deformations） of wall face,the main influential factors and their significance,and the deformation behavior of retaining wall when unloading are obtained.Test results show that：（1） the dynamic deformation is affected by amplitude of cyclic load,vibrations,filling ratio of gabion cage and so on,and not significantly affected by vibration frequency;（2） large lateral deformation occurs in the third,the fourth and the fifth layers of wall face;（3） with the increase of amplitude,vibration time to stable deformation increases,and the deformation also increases;（4） dynamic deformation increases during vibration quickly first and then tends to be slowly;and（5） the lateral deformation of the wall face shows almost no elastic recovery when unloading.

关 键 词：岩土力学 加筋格宾挡墙 动变形特性 重复荷载 红砂岩 

分 类 号：TU413.6[建筑科学—岩土工程]