建宁西路过江通道超深盾构工作井叠合结构设计

介绍建宁西路过江通道盾构隧道江南工作井的结构设计过程,通过对周边场地、建构筑物、工程地质、水文地质、基坑深度以及安全、经济等多方面综合考虑,最终采用叠合结构的设计方案。运用Midas Gen建立三维有限元模型,对结构施工期与运营期不同工况进行模拟,通过对结果分析得出工作井各阶段的受力特征并提出优化建议。简述地连墙计算结果与叠合结构计算结果的相互校核过程。

Design of Composite Structure for Ultra-deep Shield Working Shaft of West Jianning Road Crossing-river Channel

The structural design process of the working shaft at the south of river for the shield tunnel of West Jianning Road Crossing-river Channel is introduced.By comprehensively considering many aspects of surrounding area,buildings(structures),engineering geology,hydrogeology,foundation pit depth,safety and economy,the design scheme of composite structure is finally applied.A 3D finite element model is established by Midas Gen to simulate the different working conditions of structural construction period and operation period.After the analysis,the result shows that the mechanics characteristics of each stage of working shaft are given and the optimization proposal is put forward.The mutual checking process of the calculation result of the underground diaphragm wall and the settlement result of the composite structure is briefly described.