成层地基挡土墙地震响应解析解及软夹层的影响研究  

Analytical Solution for the Seismic Response of a Retaining Wall with Multilayered Foundation and the Influence of Soft Interlayer

作　　者：彭泽文 庄海洋 可文海[1] PENG Zewen;ZHUANG Haiyang;KE Wenhai(Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering,East China Jiaotong University,Nanchang 330013,China;Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]华东交通大学江西省岩土工程基础设置安全与控制重点实验室,江西南昌330013 [2]南京工业大学岩土工程研究所,江苏南京210009

出　　处：《防灾减灾工程学报》2022年第4期796-804,共9页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金面上项目(51978333,51778290)资助。

摘　　要：目前已有土-挡土墙动力相互作用的理论分析方法通常把墙后土体假设为均质土,很少能考虑层状土对挡土墙动力响应的影响。已有研究表明,挡土墙后层状土对挡土墙的地震反应及其抗震设计至关重要。鉴于此,采用Pasternak地基模型,建立了地震作用下层状地基中挡土墙的动力位移控制方程,通过引入修正Vlasov地基模型中的迭代算法,推导了层状地基弹簧系数和剪切系数的表达式。通过本文方法计算结果与已有方法计算结果的对比分析,充分证明了本文方法的正确性和可行性。同时,通过设计不同的挡土墙后软夹层厚度、埋深和土层模量比,进一步明确了软夹层的不同存在条件对挡土墙地震反应的影响规律。Dynamic interaction mechanism between soil and retaining wall is very important for the seismic design of retaining wall. However,most of the present analysis methods for the dynamic interaction of soil-retaining walls under earthquake action focused on homogeneous soil and ignored the influence of layered soil characteristics. Pasternak’s foundation model can accurately consider the interaction between soil and underground structure under earthquake action and can calculate the influence of layer soil. In this study,on the basis of the displacement governing equation of retaining walls in multilayered soils in Pasternak’s model,the exact expressions of spring and shear coefficients are obtained by introducing the iterative method in the modified Vlasov’s model. Compared with the existing analytical method,the accuracy of the proposed methods is proven. A parametric study is performed to investigate the seismic response of the retaining wall under different interlayer soft soil conditions,including thickness,depth and hardness of the interlayer soft soil behind the retaining wall.

关 键 词：层状地基 挡土墙 地震反应 分析模型 解析解 

分 类 号：TU4[建筑科学—土工工程]