市政技术2024，Vol.42Issue(5)：54-62,9.DOI:10.19922/j.1009-7767.2024.05.054
叠落式暗挖隧道连接方法比选分析
Comparison and Analysis of the Connection Method of Stacked Underground Tunnel
摘要
Abstract
In the subway stacked tunnel,the force and deformation of the upper and lower tunnels are the core prob-lems of design control,because the lower tunnel bears the load transmitted by the superstructure in the case of deep burial,so it is related to the success or failure of the construction of the stacked tunnel.The traditional stacked tun-nel model cannot consider the joint influence of the deformation of the lower tunnel on the internal force and defor-mation of the upper tunnel during the construction process,and also cannot consider the"blocking effect"of the stiffness,bearing capacity and deformation of the upper tunnel on the lower tunnel.Therefore,in view of the short-comings of the current design methods of stacked tunnels,in order to explore the influence of different connection modes of the upper and lower tunnels on the project,a design model that is closer to reality and can accurately cal-culate the load transmitted by the superstructure of the lower tunnel in the case of deep burial is proposed.Then,the correctness of the method is verified by comparing it with the traditional model curve.The analysis results show that the internal force calculated by the connection model is larger than that of the traditional model,and the calculation results of the traditional model are conservative and unsafe due to the influence of parameter selection.The connec-tion model can reflect the interaction between the rock and the excavation of the upper and lower layers of the tunnel more realistically,so as to simulate the actual stress state of the underground tunnel in the rock formation,and the conclusions obtained have certain guiding significance for the design of the same type of subway stacked tunnel pro-ject,and at the same time solve the limitation of the traditional model to calculate the internal force and deformation of a single tunnel when designing the stacked tunnel,and improve the accuracy of the structural analysis of the stacked tunnel.关键词
叠落隧道/深埋暗挖/数值模拟/弹性连接/连接模型Key words
stacked tunnel/deep burial and excavation/numerical simulation/elastic connections/connection model分类
交通运输引用本文复制引用
靳天睿,刘飞,李哲,李月阳,王伟锋..叠落式暗挖隧道连接方法比选分析[J].市政技术,2024,42(5):54-62,9.基金项目
北京市教委科技项目(KM201810016005) （KM201810016005）
新型节材加劲性截面桩承载特性的模型试验研究(X18199) （X18199）
废旧轮胎加筋土技术的工程应用研究(ZF17067) （ZF17067）
半刚性岩土材料的本构特性研究(Z08029) （Z08029）
