（上海市隧道工程轨道交通设计研究院， 上海 200011）

［摘要］东西通道位于上海市浦东新区，是CBD核心区“井”字形交通方案的重要组成部分，由地面段、地下段及桥梁段组成。其中地下段总长约6-1km，最大埋深约13-9m，主线暗埋段采用单箱双孔，匝道暗埋段采用单箱单孔，出口部分为U形敞开结构。综合多方技术论证并考虑与轨道交通14号线共建因素，围护结构采用地下连续墙、型钢水泥土搅拌墙、重力式水泥土搅拌墙形式，第一道支撑采用混凝土支撑，其余采用钢支撑，基坑坑底采用水泥土搅拌桩“裙边+抽条”加固形式；通道主体采用现浇结构，抗浮不满足段底板下采用抗拔桩抗浮，同时该工程重要关键节点多，对关键节点进行全过程仿真模拟分析，根据分析结果有针对性地采取了相应的技术措施，保证结构安全可靠和经济合理。

［关键词］地下连续墙； 型钢水泥土搅拌墙； 关键节点； 全过程模拟

中图分类号：TU354文献标识码：A文章编号：1002-848X(2019)15-0077-06

Summary of structural design of  underground section of the East-West Passage Project in  Shanghai

Ji Yan′an

(Shanghai Tunnel Engineering & Rail Transit Design and Research Institute, Shanghai 200011, China)

Abstract:The East-West Passage is located in the Pudong New Area of Shanghai. It is an important part of the “well” shaped traffic plan in the core area of the CBD. It consists of the ground section, the underground section and the bridge section. The underground section has a total length of about 6-1km and a maximum buried depth of about 13-9m. The buried section of the  main line uses a single box and two holes. The buried section of the ramp uses a single box and a single hole. The outlet part is a U-shaped open structure. Synthesizing  multi-party technical demonstration and considering the factors of co-construction with rail transit line 14, the enclosure structure is in the form of underground continuous wall, steel cement  soil mixing wall and gravity cement soil mixing wall. The first support adopts concrete braces and the rest  adopts steel braces. The bottom of the pit is made of cement soil mixing pile "skirt + pumping strip" reinforcement; the main body of the channel adopts cast-in-situ structure,  the anti-floating is not satisfied with the anti-floating pile under the bottom plate. At the same time, there are many important key nodes in the project. The whole process simulation and analysis of the key nodes are carried out. According to the analysis results, corresponding technical measures are taken to ensure the structure is safe and reliable and economically reasonable.

Keywords:underground continuous wall; steel cement soil mixing wall; key node; whole process simulation

作者简介：纪延安，硕士，高级工程师， Email：514543800@qq.com。