新建隧道与既有隧道交叉段施工方案研究

Construction scheme research of cross section between newly built tunnel and existing tunnel

近年来,随着我国铁路、公路及市政建设事业的高速发展,越来越多的隧道工程投入建设。由于地质条件的限制及地下空间的综合开发利用,在工程中不可避免地产生近距离交叉隧道。鉴于新建隧道施工会对既有隧道造成不利影响,同时也增加了新建隧道施工的难度,结合某城市隧道上跨厦深铁路隧道的工程设计实例,着重对比分析新建隧道两种施工方案,探讨交叉隧道段加固方案以及监控量测方案,对近距离隧道施工具有一定的指导意义。

In recent years,more and more tunnel projects are invested in construction with the high-speed development of railways,highways and municipal construction in China.Close cross tunnel is inevitably arisen in the project due to geological conditions and comprehensive development and utilization of under-ground space,which will cause adverse affect to existing tunnel and thus increase difficulties to the new tunnel construction.A design example of a city tunnel upcrossing Xiamen-Shenzhen railway tunnel was presented,and two construction programs of which were comparatively analyzed to explore the cross-tunnel section reinforcement programs as well as the measurement monitored programs,which will provide certain guiding significance to close cross tunnel construction.