地震作用下绢云母片岩高路堤中土工格栅效用分析  

Analysis of Geogrid Reinforced Sericite Schist High Embankment Under Earthquake Action

作　　者：许孝飞 朱耀光 贺钰涛 王向阳[2] 张子璇 XU Xiaofei;ZHU Yaoguang;HE Yutao;WANG Xiangyang;ZHANG Zixuan(Hubei Communications Investment Construction Group Co.,Ltd.,Wuhan 430070,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]湖北交投建设集团有限公司,武汉430070 [2]武汉理工大学交通与物流工程学院,武汉430063

出　　处：《交通科技》2024年第5期7-12,共6页Transportation Science & Technology

基　　金：湖北省交通运输科技项目资助。

摘　　要：对于采用绢云母片岩土石混合料为填料的高路堤而言,通常会出现地震作用下路堤变形严重等问题,加筋为通常做法。文中依托十巫北高速公路项目,以绢云母片岩土石混合料填筑的高路堤进行地震动力响应分析。结果表明,土工格栅具有分担部分应力,减小路堤动力加速度,以及抑制其变形的作用。对于路堤整体而言,加筋路堤的最大应力相对于未加筋路堤所承受应力较小;相比于无筋路堤,路堤加筋后加速度和速度明显减小,在路堤同一高度上土工格栅加筋土路堤的水平向峰值加速度和速度比未加筋路堤的水平向峰值加速度和速度小;土工格栅加筋对路堤整体的纵向沉降和侧向位移具有抑制效果,显著地减弱路堤在地震作用下的破坏程度。For the high embankment filled with sericite flake rock-soil-rock mixture,there are usually problems such as serious deformation of embankment under earthquake action,and reinforcement is usually used to solve such problems.Based on the Shiwubei Expressway project,the seismic dynamic response of high embankment filled with sericite rock-soil mixture was analyzed.The research shows that the geogrid has the function of sharing part of the stress,reducing the dynamic acceleration of the embankment and restraining its deformation.For the embankment as a whole,the maximum stress of the reinforced embankment is smaller than that of the unreinforced embankment.Compared with the unreinforced embankment,the acceleration and velocity of the reinforced embankment are significantly reduced.At the same height of the embankment,the horizontal peak acceleration and velocity of the geogrid reinforced embankment are smaller than those of the unreinforced embankment.Geogrid reinforcement has an inhibitory effect on the longitudinal settlement and lateral displacement of the whole embankment,significantly reducing the damage degree of the embankment under earthquake action.

关 键 词：高填方路堤 土工格栅 地震作用 绢云母片岩 数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]