喇叭口分岔隧道过渡段结构优化选型研究

随着我国交通流量的不断增加,在铁路车站、地铁车站不可避免地会遇到多座隧道汇集至车站的情况,而多座隧道汇集至车站常常采用喇叭口分岔隧道的形式,如何合理设计喇叭口分岔隧道,目前国内尚处于经验积累阶段。本文针对Y形分岔隧道,采用Flac3D软件构筑三维数值分析模型,对三种设计方案的受力情况进行分析计算,综合三种方案的通风效果、经济性、可施工性,对三种方案进行了比选。

Research on Structural Optimization and Selection of the Transition Section of the Flare Bifurcation Tunnel

With the continuous increase of China’s traffic flow,railroad stations and subway stations will inevitably encounter the situation that multiple tunnels converge to the station,and the convergence of multiple tunnels to the station often takes the form of a flared branch tunnel.How to reasonably design flared bifurcation tunnel is still in the stage of accumulated experience in China at present.In this paper,for the Y-shaped bifurcation tunnel,Flac3 D software is used to construct a three-dimensional numerical analysis model.The stress of the three design schemes is analyzed and calculated.The ventilation effects,economics and constructability of the three schemes are integrated for the selection of three design schemes.