正常固结饱和黏土中倾斜平板锚承载力分析  

Analysis of Pullout Capacity of Inclined Plate Anchors in Normally Consolidated Saturated Clay

作　　者：杨德健 江自强[1,2] 卢力强 程星磊 刘举[1,2] 孙晓涵 YANG Dejian;JIANG Ziqiang;LU Liqiang;CHENG Xinglei;LIU Ju;SUN Xiaohan(School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China;Key Laboratory of Soft Soil Engineering Character and Engineering Environment of Tianjin,Tianjin Chengjian Uni-versity,Tianjin 300384,China)

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]天津城建大学天津市软土特性与工程环境重点实验室,天津300384

出　　处：《防灾减灾工程学报》2022年第5期1113-1120,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：天津市高等学校基本科研业务费资助项目(2016CJ04)资助。

摘　　要：基于ABAQUS软件平台,针对浅埋及深埋两种情况,采用数值模拟手段研究了正常固结饱和黏土中倾斜平板锚的抗拔承载力,分析了不同土重条件及锚土接触条件对倾斜锚板抗拔承载特性的影响,揭示了不同工况下倾斜锚板周围土体的流动机制,阐明了埋置深度、土重条件及锚土接触条件对锚板破坏机制的影响。研究结果表明:“锚土分离”条件下,承载力系数随倾斜角度增大逐渐增大,这主要是由于土体剪切破坏面随倾斜角度的增大逐渐增大所致;“锚土黏结”条件下承载力系数随倾斜角度增大逐渐减小,这主要是由于土体的剪切破坏面随倾斜角度增大逐渐减小所致;无论“锚土分离”还是“锚土黏结”,浅埋条件下倾斜角度对承载力的影响均要大于深埋条件。建议了能够预测“锚土黏结”条件下倾斜锚板承载力的表达式,可为正常固结黏土中平板锚的工程设计提供参考。The pullout capacity of inclined plate anchors in normally consolidated saturated clay is studied by numerical simulation for shallow and deep embedded conditions based on ABAQUS software platform. The effect of different soil weight conditions and contact conditions on the pull-out bearing characteristics of inclined anchor plate is analyzed. The flow mechanism of clays around inclined anchor plate under different working conditions is revealed. The influence of embedment depth,soil weight and contact condition of anchor-soil on the failure mechanism of anchor plate is clarified. It is found that the pullout capacity factor of vented plate anchor increases as the inclination angle increase,which is mainly due to the increase of shear failure surface with the increase of inclination angle. However,the pullout capacity factor of attached anchors decreases with the increase of inclination angle,which is mainly due to the decrease of shear failure surface with the increase of inclination angle. For both vented and attached anchors,the influence of the inclination angle on the pullout capacity is greater in shallow embedded condition than in deep embedded condition. A formula that can predict the pullout capacity of attached inclined plate anchor is proposed,which can provide some reference for the engineering design of inclined plate anchor in normally consolidated clay.

关 键 词：倾斜平板锚 黏土 承载力 埋深 数值模拟 

分 类 号：TU473.1[建筑科学—结构工程]