库岸加筋土挡墙在地震和涌浪作用下的稳定性分析  

Analysis of Surge under Earthquake Effects on the Stability of Reinforced Soil Retaining Wall

作　　者：孙树林[1,2] 时冬冬[1] 秦鲜玮 朱明杰[1] 周向向[1] 谢凡[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《科学技术与工程》2015年第12期92-97,共6页Science Technology and Engineering

基　　金：河海大学水文水资源与水利工程科学国家重点实验室开放研究基金项目(2005408911);留学回国人员科研基金项目(20071108);江苏省环境保护厅项目(201029)资助

摘　　要：为研究不同筋材条件下的库岸加筋土挡墙在地震和涌浪共同作用下的稳定性,采用两种简化破裂面形式,运用拟动力法和水平条分法推导出其所受筋材总拉力与临界破裂角的计算公式。算例分析结果表明,临界破裂角随着竖向地震加速度系数和内摩擦角的增大而增大,随着水平加速度系数的增大而减小;筋材总拉力随着地震加速系数以及上游水位的增大而增大,随着土体内摩擦角、上游水位以及涌浪高度的增大而减小。当条件相同时,可延展性筋材所承受的筋材总拉力大于不可延展性筋材。In order to study stability of reservoir bank soil retaining wall reinforced with different materials under earthquake and surge, two simplified failure surface are considered. The formula of the total reinforcement tensile and the critical angle of rupture is obtained by the combination of pseudo-dynamic and horizontal slice method. The example analysis results show that the critical rupture angle increases with the vertical seismic acceleration coefficient, while it decreases with the horizontal seismic acceleration coefficient. And the total reinforcement tensile force increases with the increase of seismic acceleration coefficient and the upstream water level, while it decreases with the internal friction angle of soil and the upstream water level or the surge height. Furthermore, the total pullout reinforcement tensile for flexible reinforcement material is lager than the total breakage reinforcement tensile for rigid reinforcement material under the same condition.

关 键 词：加筋土挡墙 地震 涌浪 拟动力法 稳定性 

分 类 号：TU435[建筑科学—岩土工程]