CAJ | 학술논문

南京德基广场二期工程位于南京市中心区域，主楼区普遍开挖深度21.50m，附楼区普遍开挖深度19.70m，基坑开挖深度较深，基坑面积巨大。本文通过分析该工程的建筑结构方案、场地的工程地质条件和水文地质条件、周边环境等因素，提出了基坑周边全部采用两墙合一的地下连续墙作为基坑围护结构，并且附楼逆作法施工，结合主楼顺作法施工的设计方案。在此基础上，本文提出了相应的地铁隧道保护措施。另外本文采用通用有限元分析软件，取邻近地铁侧的典型剖面计算基坑开挖对地铁隧道的影响，计算结果显示该工程采用逆作法施工对周围环境影响较小，能满足地铁运营对隧道变形提出的要求。本文对采用逆作法施工的工程具有一定的指导意义。
남경덕기엄장이기공정위우남경시중심구역，주루구보편개알심도21.50m，부루구보편개알심도19.70m，기갱개알심도교심，기갱면적거대。본문통과분석해공정적건축결구방안、장지적공정지질조건화수문지질조건、주변배경등인소，제출료기갱주변전부채용량장합일적지하련속장작위기갱위호결구，병차부루역작법시공，결합주루순작법시공적설계방안。재차기출상，본문제출료상응적지철수도보호조시。령외본문채용통용유한원분석연건，취린근지철측적전형부면계산기갱개알대지철수도적영향，계산결과현시해공정채용역작법시공대주위배경영향교소，능만족지철운영대수도변형제출적요구。본문대채용역작법시공적공정구유일정적지도의의。
The Nanjing Deji Plaza(Phase 2)project is located at the center of Nanjing.Excavation depths of main building and attached building are 21.50m and 19.70m respectively.The excavation depth of the foundation pit is deep.The pit area is huge.This paper analyzes the project structure, engineering geological conditions, hydrogeology conditions,surrounding environment and especially protection of subway tunnel.Pit support structure adopts underground diaphragm wall with two walls joining together.The attached building is constructed with top-down method.The main building is constructed with down-top method.This paper has put forward the protection measures to subway tunnel.In addition,this paper uses the general finite element analysis software to calculate the influence to subway tunnel by foundation pit excavation.The results show that this project has little impact on surrounding environment using top-down method,and meets the requirement of tunnel deformation with metro operation.This paper has a certain guiding significance for the projects with top-down method.