软土地区历史保护建筑地下空间整体顺作技术  

Integral Bottom-up Construction Technology of Underground Space of Protective Historic Buildings in Soft Soil Area

作　　者：黄开勇 王强强 梁志荣 魏祥 HUANG Kaiyong;WANG Qiangqiang;LIANG Zhirong;WEI Xiang(Shanghai Shen Yuan Geotechnical Engineering Co.Ltd.,Shanghai 200011)

机构地区：[1]上海申元岩土工程有限公司,上海200011

出　　处：《土工基础》2023年第5期753-758,共6页Soil Engineering and Foundation

基　　金：上海市青年科技英才扬帆计划(21YF1432600);上海市地质学会课题(Dzxh202108,Dzxh202208);上海市优秀技术带头人计划(22XD1432800);上海市青年科技启明星计划(21QB1404400)。

摘　　要：以上海董家渡11号地块旧区改造工程吉安里会所项目为例,介绍软土地区历史保护建筑下方地下空间的局部盖挖、整体顺作开挖关键技术。首先将预先加固过的历史建筑平移至过渡位置,穿插施工基坑支护结构以及永久位置竖向支承体系及地下室顶板,然后将建筑平移至永久位置完成基础托换。整个基坑实现整体顺作开挖,其中,历史建筑的正下方采用局部盖挖施工。该技术既保证了历史建筑的安全,又实现了地下空间的整体开发,节约了工期和造价。根据监测,基坑开挖期间历史建筑总体呈现出先小幅沉降后略微抬升的变形规律。技术方案和监测数据可为今后类似项目提供参考。Key technology of partial covered excavation and integral bottom-up construction of underground space under protective historic buildings is introduced based on a case history in Shanghai.After the pre-reinforced historic buildings were transferred to transition positions,the retaining and supporting structures of the excavation were interspersedly constructed with the vertical supporting systems and the B0 slabs of the permanent positions.After that,the historic buildings were transferred to the pre-constructed permanent positions before underpinning.So that the entire excavation was constructed by the integral bottom-up method while regions under the historic buildings were partial covered excavated.By using the innovative excavation technology,the safety of the historic buildings was achieved while the underground space was integral developed.Furthermore,the construction period was shortened and the construction cost was saved as well.The historic buildings elevated mildly after subsiding slightly during excavation according to monitoring data.The technical scheme and field data may provide reference for similar projects in future.

关 键 词：软土 历史保护建筑 深基坑 基础托换 建筑平移 局部盖挖 

分 类 号：TU473[建筑科学—结构工程]