深厚淤泥质土层中半逆作法基坑支护设计与分析.pdf

工技术 2012年4月下 56 CONSTRUCTION TECHNOLOGY 第41卷第363期 深厚淤泥质土层中半逆作法基坑支护设计与分析 董利华，邢国然，刘有才，吉红波 (浙江中战建工集团有限公司，浙江绍兴312000) 【摘要]以绍兴好望大厦半逆作法工程为工程背景，考虑软土本构关系与结构空间效应，采用有限元软件PLAXIS 和ANSYS评估开挖过程中支护体系动态响应、基坑安全性以及环境影响，有效地解决了半逆作法基坑的支护结 构、支撑系统及变形预测等设计关键技术间题.监测数据表明基坑安全可靠，取得了较好的经济社会效益. 【关键词]地下工程：基坑；支护；淤泥质土；半逆作法；有限元分析 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2012)08-0056-05 Design and Analysis of Foundation Excavation Supports with Semi Reverse Construction Method in the Deep Muddy Soil Dong Lihua Xing Guoran Liu Youcai Ji Hongbo Zhejiang Zhongcheng Construction Group Co.Ltd.Shaoxing Zhejiang 312000 China) Abstraet:Considering soft soil properties and 3D structural effeets semi-reverse foundation excavation of Haowang Building in Shaoxing is analyzed by finite element analysis software PLAXIS and ANSYS.Then the dynamical response of foundation excavation supports is calculated and safe behaviors and environmental effects are obtained.Thus some key design problems as retaining system optimization and deformation predictions can also be effectively solved.Monitoring results show that the foundation excavation is safe and reliable meanwhile good economical and social benefits are gained. Key words:underground;foundation excavation;supports:muddy soil;semi reverse construction method;finite element analysis 1工程概况 一条水泥道路，道路下分布有市区污水总管和煤气 绍兴好望大厦是一栋集办公、营业及商业于一管线，与地下室外墙边线最近距离约2m 需要重点 体的高档写字楼，建成后为绍兴市城北商务地标建 保护. 筑.工程主体由一幢27层主楼、一幢27层附楼和2工程地质情况 3层裙房组成，地下室2层，总用地面积13831m2 根据业主提供的地质资料，基坑开挖深度影响 总建筑面积99468m2 总高度99....