盾构穿越桥梁的桩基拔除与挡墙重建施工技术  

Pile Removing and Retaining Wall Reestablishing Technique of Shield Machine Crossing Through Bridge

作　　者：杨宇恒[1] 孔祥鹏 荣建 周均立 刘靖[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]上海市第二市政工程有限公司,上海200065

出　　处：《地下空间与工程学报》2012年第2期370-374,共5页Chinese Journal of Underground Space and Engineering

基　　金：上海市科委2010科技攻关计划(10231200202)

摘　　要：以上海轨道交通11号线穿越桥台桩基为工程背景,通过综合比选确定了套管拔除+水压减摩的桩基拔除方案和"L"型挡墙+搅拌桩加固的挡墙重建方案。运用数值模拟软件对重建过程位移场的变化情况进行了计算复核,计算结果表明:"L"型挡墙结构能较好地抑制河道开挖过程中墙背土体的沉降,且结构自身变位小,能满足工程安全和周边环境保护的要求。研究成果为今后类似工程提供了借鉴和参考。Based on the crossing through bridge project in Shanghai metro line 11,pile removing and retaining wall reestablishing programs have been identified by comprehensive comparison.Changes in the displacement field are checked and analysed with numerical simulation approach（FEM）.The results show that the ＂L＂ type retaining wall with a small displacement could inhibit the settlement of soil behind the wall and meet the requirements of safety and environmental protection.The research results provide a reference for future similar projects.

关 键 词：盾构 穿越 桩基拔除 挡墙重建 方案比选 有限元分析 

分 类 号：TU47[建筑科学—结构工程]