摘要
在研制的室内模型箱中,进行不同筋材配筋率和铺筋层数下加筋土挡墙模型试验,不同拉拔速度筋-土界面原位拉拔试验,分析了配筋率和铺筋层数对加筋土挡墙变形及土压力的影响及拉拔速度对筋-土界面抗剪强度的影响。结果表明,挡墙顶部沉降在筋材与面板连接处及挡墙后部较大,挡墙中间部位沉降较小。随着配筋率和铺筋层数的增加,挡墙顶部沉降和刚性面板倾角变小,面板受到的土压力减小。加筋土挡墙最优配筋率为60%~70%。拉拔速度对筋-土界面黏聚力几乎没有影响,但筋-土界面摩擦角随着拉拔速度的增加有增大趋势,从而导致筋-土界面的抗剪强度增大。
Indoor model tests on reinforced retaining wall with different reinforcement ratios,reinforcement layers and pulling speed are conducted in a chamber developed by the authors.The influences of different reinforcement ratios and reinforcement layers on deformation of the retaining wall and pulling speed on reinforcement-soil interface shear strength are analyzed.The test results show that the settlement at the joint of the reinforcement materials and panel of retaining wall is larger than the back and middle parts of the retaining wall.The settlement and rigid panel angle get smaller and the earth pressure decreases with the increase of reinforcement ratios and layers.What is more,the optimal reinforcement ratio of the reinforced retaining wall is between60%and 70%.The pulling speed has little effect on cohesion between soil and reinforcement.But the friction angle increased with the increase of pulling speed,resulting in increase of shear strength on reinforcement-soil interface.
作者
廖红建
熊甜甜
杨博
谈云志
LIAO Hongjian;XIONG Tiantian;YANG Bo;TAN Yunzhi(Hubei Key Laboratory of Disaster Prevention and Mitigation,China Three Gorges University,Yiehang 443002,China;School of Human Settlement and Civil Engineering,Xi'an Jiaotong University,Xi'an 710049,China;School of Urban Construction,Xi'an Siyuan University,Xi'an 710038,China;Yunnan Design Institute Group,Kuming 650228,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2018年第5期837-843,共7页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(41172276,51279155)
防灾减灾湖北省重点实验室(三峡大学)项目(2016KJZ02)
陕西省教育厅自然科学基金(16JK2148)
西安思源学院校级自然科学重点项目(XASY-B1602)资助
关键词
加筋土挡墙
模型试验
土压力
拉拔试验
抗剪强度
reinforced soil retaining wall
model experiment
earth pressure
pull-out test
shear strength
作者简介
廖红建(1962一),女,教授,博导,博士。主要从事岩土工程数值分析研究。Email:hjliao@mail.xjtu.edu.cn.
