上海中心大厦裙房基坑逆作法支护体系实测分析.pdf

2012年9月下 施工技术 第41卷第373期 CONSTRUCTION TECHNOLOGY 31 上海中心大厦裙房基坑逆作法支护体系实测分析 翟文信 (上海建科工程咨询有限公司，上海200032) [摘要]上海中心裙房基坑采用两墙合一的地下连续墙作为围护、结构梁板替代支撑并采用全逆作法施工.介绍 了全逆作法基坑的支护体系及施工工艺，从逆作法施工支护体系的实测数据人手，通过对立柱桩的偏位及隆沉、地 下连续墙的侧向变形、立柱桩与地下连续墙的差异沉降等实测数据分析，对逆作法施工全生命周期支护体系的安 全状态进行评价. [关键词]高层建筑；基坑；逆作法；支护体系；变形；差异沉降 [中图分类号]TU753.1 [文献标识码]A[文章编号]1002-8498(2012)18-0031-04 Monitoring Analysis on Supports of Reversed Constructed Podium Foundation Excavation in Shanghai Tower Zhai Wenxin Shanghai Jianke Engineering Consulting Co. Lid.Shanghai 200032 China) Abstract:The foundation excavation of podium in Shanghai Tower is constructed with reversed method which adopting diaphragm wall as supporting structure of the foundation excavation and external wall of basement and adopting basement beams and floors as the supports of foundation excavation.The supporting system and construction technology of the reversed constructed foundation excavation are introduced.The monitoring data of supporting system are analyzed to evaluate the safety status during the whole construction process such as deviation and settlement of steel pipe columns lateral deformation of diaphragm walls differential settlement between steel pipe columns and diaphragm walls. Key words:tall buildings;foundation excavation;reversed construction method;supports;deformation; differential settlement 1工程概况 影部分，为直径121m的圆状基坑，采用明挖顺作法 上海中心大厦工程地处陆家嘴金融中心核心施工，开挖深度约31.1m;裙房基坑呈不规则的四边 区，地下5层，地上主楼121层，裙房5层，总建筑面形（扣除中间圆状主楼基坑），采用逆作法施工，开 积约573223m2.北侧为88层的金茂大厦，其地下...