软土地基历史建筑地下空间开发的设计与实践  

Design and practice of underground space development of existing historical buildings in soft soils

作　　者：王卫东 胡耘 沈健 徐中华 WANG Weidong;HU Yun;SHENG Jian;XU Zhonghua(Arcplus Group PLC,Shanghai 200002,China;Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations,Shanghai 200002,China;Shanghai Underground Space Engineering Design&Research Institute,East China Architecture Design&Research Institute Co.,Ltd.,Shanghai 200011,China)

机构地区：[1]华东建筑集团股份有限公司,上海200011 [2]上海基坑工程环境安全控制工程技术研究中心,上海200011 [3]华东建筑设计研究院有限公司上海地下空间与工程设计研究院,上海200011

出　　处：《岩土工程学报》2023年第12期2445-2453,共9页Chinese Journal of Geotechnical Engineering

基　　金：上海市科学技术委员会科研项目(22dz1203700);上海市住房和城乡建设管理委员会科研项目(沪建科2021-002-039);上海市优秀技术带头人计划资助项目(20XD1430300)。

摘　　要：上海历史风貌区某街坊保护性综合改造项目,为满足更新扩容需求,于历史建筑(B楼)下方并紧贴文保建筑(A楼)新增3层地下空间,面临既有建筑保护、空间受限条件下施工作业等众多技术难题。综合地下空间开发需求、文保和历史建筑保护要求、软土地质条件、狭小作业空间、安全、造价和工期等各方面的因素,采用历史建筑利用首道支撑作为平移平台并与基坑开挖同步的往复平移技术,实现了大体量砌体建筑地下空间整体开发及对历史建筑的保护;采用以低净空锚杆静压桩与文保建筑条形基础组成沉降控制复合加固基础为主的文保建筑变形控制技术,实现了新增地下空间施工期间紧邻文保建筑的保护。结合该项目的成功实施,介绍历史建筑下方、紧贴文保建筑新增地下空间所遇到的问题、解决思路、采用的关键技术及实施效果。A three-storey basement has been newly constructed underneath a century-old historical building in Shanghai,which is close to a cultural protection building at three sides.In view of various difficult factors encountered such as the protection requirements,the soft soil foundation,the working space and other factors,a complete development strategy for underground space is adopted.By reciprocatively translating the historical buildings together with excavating downwards,the overall development of the underground space of large masonry buildings and the protection of historical buildings are realized.The strip foundations of the building are reinforced using low-clearance anchor static pressure piles and polyester grouting to reduce building settlement during construction.Based on the successful implementation of the project,new challenges,key techniques and their effects with regard to underground space development underneath existing cultural protection and historical buildings in soft soils are presented.

关 键 词：软土地基 地下空间开发 文保建筑 历史风貌建筑 往复平移 基础加固 

分 类 号：TU43[建筑科学—岩土工程]