饱和层状砂土地震液化特性模拟与改良  

Simulation and Improvement of Seismic Liquefaction Characteristics of Saturated Layered Sand

作　　者：赵久鑫 王刚 王煜斌 赵莉 董月馨 李纯[1] ZHAO Jiuxin;WANG Gang;WANG Yubin;ZHAO Li;DONG Yuexin;LI Chun(School of Resources and Civil Engineering,Northeastern University,Shenyang,Liaoning 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《水利与建筑工程学报》2022年第1期43-48,55,共7页Journal of Water Resources and Architectural Engineering

基　　金：辽宁省自然科学基金资助项目(2013010311-401);国家自然科学重大基金项目(90915005)。

摘　　要：探究在地震作用下饱和层状砂土液化规律,并通过设置抗液化桩、隔振墙等装置,研究该装置对土体的抗液化性能的影响。文章基于基底压应力法算得静力部分的各土层位移量,同时基于液化判别准则和理论,结合辽宁省文化艺术中心和省博物馆新馆工程背景,应用有限元软件,通过选取峰值加速度为0.6g的水平向Kobe地震波进行计算,对各土层位置超孔压比、超孔隙水压力和有效应力等进行研究,对此时各层位置土体的液化情况进行对比分析。得到了抗液化桩、隔振墙能不同程度地减小土体地震液化响应的结论。The liquefaction law of saturated layered sand under earthquake action was investigated,and the anti-liquefaction pile and vibration isolation wall were installed to provide reference for the anti-liquefaction performance design and engineering application of this kind of soil. At the same time,based on the liquefaction criterion and theory,combined with the Liaoning Provincial Culture and Art Center and the new Museum project background,the finite element software is used to calculate the horizontal Kobe seismic wave with the peak acceleration of 0. 6 g. The excess pore pressure ratio,excess pore water pressure and effective stress of each soil layer were studied,and the liquefaction of each soil layer was compared and analyzed. It is concluded that the device can reduce the seismic liquefaction response of soil in different degrees to solve the tedious problem of liquefaction characteristic analysis of multilayer soil.

关 键 词：饱和砂土 液化 抗液化桩 超孔压比 隔振墙 

分 类 号：TU44[建筑科学—岩土工程]