地震作用下豫西黄土地区加筋挡土墙的变形模拟研究  

Deformation of Reinforced Retaining Wall in Western Henan Loess Soils under Seismic Loads

作　　者：李鸿娟 LI Hongjuan(The Fourth Geological Exploration Institute,Henan Geology and Mineral Bureau,Zhengzhou 450000)

机构地区：[1]河南省地质矿产勘查开发局第四地质勘查院,郑州450000

出　　处：《土工基础》2022年第2期202-207,213,共7页Soil Engineering and Foundation

摘　　要：为了研究豫西黄土地区加筋挡土墙在地震荷载下的变形特征,采用FLAC3D非线性有限差分方法,研究了土工格室加筋挡土墙在地震作用下的破坏机理,分析了土工格室挡土墙相较于未加筋挡土墙和土工格栅加筋挡土墙在控制变形方面的优势,并通过改变土工格室的加筋长度和加筋间距来研究加筋墙体的变形。研究结果表明,地震作用下土工格室挡土墙墙边侧向位移略小于墙中及墙背,土工格室对侧向位移的控制作用明显,控制变形作用较土工格栅更优越;增加加筋长度和减小加筋间距均能有效减少挡土墙的侧向位移,且对墙顶处位移控制要比对其它位置好。In order to study of the deformation of the reinforced retaining walls in Western Henan loess soils under the seismic loads, this paper uses FLAC3 D nonlinear finite difference method for the failure mechanism of a retaining wall reinforced by the geocell and the geogrid. The seismic deformation of the retaining wall improved by the geocell and the geogrid compared with that of the retaining wall without. The influence of length as well as the spacing of the geocell and the geogrid on the deformation are also evaluated. The results show that the lateral displacement at the wall side of geocell retaining wall is slightly smaller than that of the middle wall and the back wall under earthquake action, and the control effect of geocell on lateral displacement is obvious. The lateral displacement of retaining wall can be reduced effectively by increasing the length of reinforcement and decreasing the spacing of reinforcement, and the displacement control at the top of the wall is better than that at other positions.

关 键 词：豫西黄土 土工格室 挡土墙 地震作用 墙体变形 数值模拟 

分 类 号：TU435[建筑科学—岩土工程]