堆载作用下塑料排水板和袋装砂井联合加固软基有限元分析  

Finite element analysis of soft foundation reinforced by plastic drainage board and bagged sand well under heap loading

作　　者：王志宏 刘杰 付贵海[3] WANG Zhihong;LIU Jie;FU Guihai(Changde Economic Construction Investment Group Co.,Ltd,Changde,Hunan 415000,China;Hunan Architectural Design Institute GroupCo.,Ltd,Changsha,Hunan 410000,China;College of Civil Engineering,Hunan City University,Yiyang,Hunan 413000,China)

机构地区：[1]常德市经济建设投资集团有限公司,湖南常德415000 [2]湖南省建筑设计院集团股份有限公司,长沙410000 [3]湖南城市学院土木工程学院,湖南益阳413000

出　　处：《湖南城市学院学报（自然科学版）》2022年第5期7-12,共6页Journal of Hunan City University:Natural Science

基　　金：湖南省自然科学基金项目(2021JJ50142)。

摘　　要：结合Biot三维固结理论和某快速轨道交通线的软基处理工程实例,利用Abaqus非线性有限元分析软件,建立塑料排水板和袋装砂井联合超载预压软基的三维有限元模型,研究了加固软基在堆载作用下的有效应力分布、土体地表沉降以及孔隙水压力消散规律。结果表明:排水板与袋装砂井联合加固复杂深厚软土场地,具有较好的适用性,且可减少堆载预压对加固软基外部土体的影响。Combined with Biot's three-dimensional consolidation theory and an engineering example of soft foundation treatment of a fast rail transit line,a 3D finite element model of plastic drainage board and bagged sand well combined with overloaded preloaded soft foundation was established by using Abaqus nonlinear finite element analysis software.Effective stress distribution,soil surface settlement and pore water pressure dissipation law of reinforced soft foundation under heap load were studied.The results show that the combination of drainage board and bagged sand well to strengthen the complex and deep soft soil site has good applicability,and can reduce the influence of surcharge preloading on strengthening the external soil of soft foundation.

关 键 词：有限元分析 塑料排水板 袋装砂井 超载预压 软基加固 

分 类 号：TU528.1[建筑科学—建筑技术科学]