地震作用下土工格栅加筋挡墙斜坡稳定性研究  

Study on Slope Stability of Geogrid Reinforced Retaining Wall Under Earthquake

作　　者：李丞 陈新星 汪玉容 Li Cheng;Chen Xinxing;Wang Yurong(School of Architectural Engineering,Kaili University,Kaili,China)

机构地区：[1]凯里学院建筑工程学院,贵州凯里

出　　处：《科学技术创新》2023年第11期179-182,共4页Scientific and Technological Innovation

基　　金：贵州省教育厅高等学校科学研究项目(青年项目)(编号:黔教技[2022]361);凯里学院博士启动专项课题(BS20230101);凯里学院2022年校级“金课”(一流课程)建设项目(编号:JK202206)。

摘　　要：地震荷载和土工格栅布置方式对加筋挡墙边坡稳定性有重要影响。为此,本研究采有限元极限分析上限法分析了挡墙边坡在不同地震能量(0 g、0.1 g、0.2 g和0.3 g)时,土工格栅布置方式对挡墙斜坡动力稳定性的影响。结果表明:当斜坡方向为水平和斜方向时,斜坡安全系数随着地震幅值的增大而减小,然而,当斜坡方向垂直时,斜坡安全系数却随着地震幅值的增大而增大。当土工格栅长度达到一定数值时,土工格栅长度反而没有增强斜坡稳定性。在实际加固设计工作中,应将土工格栅水平布置为宜。土工格栅长度越长,挡墙上下的水平位移差异越小。挡墙斜坡的破坏模式与土工格栅长度密切相关。The seismic load and the arrangement of geogrids have a significant impact on the stability of reinforced retaining wall slopes.Therefore,this research adopts the upper limit method of finite element limit analysis to analyze the impact of geogrid layout on the dynamic stability of retaining wall slopes under different seismic energies(0 g,0.1 g,0.2 g and 0.3 g).The results indicate that when the slope direction is horizontal and oblique,the safety factor of the slope decreases with the increase of earthquake amplitude.However,when the slope direction is vertical,the safety factor of the slope increases with the increase of earthquake amplitude.When the length of the geogrid reaches a certain value,the length of the geogrid does not actually enhance the stability of the slope.In actual reinforcement design work,it is advisable to arrange the geogrid horizontally.The longer the length of the geogrid,the smaller the difference in horizontal displacement between the top and bottom of the retaining wall.The failure mode of the retaining wall slope is closely related to the length of the geogrid.

关 键 词：地震 挡墙 极限分析 土工格栅 

分 类 号：TU435[建筑科学—岩土工程]