基于拉断破坏的加筋土挡墙土压力分析  

Analysis of lateral soil pressure for reinforced earth retaining wall based on tensile failure

作　　者：薛晓辉[1] 孙文君[2] 苗正伟[2] 代智光[2] 龚小琴 

机构地区：[1]陕西铁路工程职业技术学院建筑工程系,西安714000 [2]河北工程技术高等专科学校,沧州061001

出　　处：《长春工程学院学报（自然科学版）》2010年第1期26-28,共3页Journal of Changchun Institute of Technology：Natural Sciences Edition

摘　　要：通过考虑拉筋存在的影响,应用准粘聚力理论和库仑理论,提出了拉断破坏形式的加筋土挡墙墙背土压力计算公式。研究结果发现:拉断破坏下的加筋土粘聚力具有了增量,提出的加筋土挡墙墙背侧向土压力比经典土压力和变系数法都小,提出的加筋土挡墙侧向土压力都随拉筋垂直间距增加而增加,加筋土挡墙侧向土压力随拉筋抗拉强度增加而减小,与土工格栅加筋土挡墙试验数据基本一致。Considering the effect of reinforcement,and applying the cohesive force theory and Coulomb＇s earth pressure theory,thus the tensile failure theoretical formulae of lateral soil pressure for reinforced earth retaining wall is obtained.Analytical results show：cohesive force of reinforced earth has increment for the tensile failure,lateral soil pressures value using proposed formula are smaller than using classical earth pressure theories and variational coefficient method of earth pressure,and will increase with increasing of the vertical spacing of the reinforcement,and active lateral soil pressures by the proposed formula for tensile failure will decrease with increasing of the tensile strength of the reinforcement.The calculating results from this paper＇s method basically accord with results of the site tests in geogrid reinforced earth retaining wall.

关 键 词：强度模型 侧向土压力 加筋土挡墙 竖向间距 拉断破坏 

分 类 号：TU43[建筑科学—岩土工程]