相邻深基坑围护结构设计方案优化研究  

Optimization Design of Supporting Structures for Two Adjacent Deep Excavations

作　　者：李锦 LI Jin(Shanghai Urban Construction Design&Research institute(Group)Co.Ltd.,Shanghai 200125)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《土工基础》2023年第4期562-565,共4页Soil Engineering and Foundation

摘　　要：城市地下空间工程施工时,往往由于用地、工期矛盾,会出现两个甚至多个基坑同时施工的情况,导致基坑工程相邻,基坑支护结构的设计将面临同坑开挖和分坑开挖方案的选择,不同开挖方案对基坑工程的安全性、经济性及周边环境等都有重要影响。以江西省九江市某调蓄池及就地处理站基坑为工程背景,综合考虑基坑围护结构的受力特性、安全性与经济性,研究两个相邻地下工程基坑支护结构的设计方案,并对相邻深基坑同坑、分坑施工的设计方案进行比选,对基坑围护结构设计进行优化,寻找最优设计方案,并为相关工程提供参考。During the construction of urban underground space engineering,due to the contradiction between land use and construction duration,two or even more deep excavations will be constructed concurrently,resulting in the different impact on the adjacent environment.The design of deep excavation support structure will face the selection of the same pit excavation and sub pit excavation plans.Different excavation plans have an important impact on the safety,economy and surrounding environment of excavation engineering.This paper presents a case history of the deep excavation of a regulation and storage tank and local treatment station in Jiujiang City,Jiangxi Province.The stress characteristics,safety and economy of the excavation supporting structure are evaluated.The different design plans for the excavation supporting structures for the two adjacent projects are compared and the design of the construction of the same excavation and separate excavation of the other pit are selected.

关 键 词：相邻深基坑 支护体系 方案优化 分坑施工 同坑施工 

分 类 号：TU473[建筑科学—结构工程]