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随着区域性大城市之间城际轨道交通工程快速的发展,铁路路网分布不断完善,新建城际铁路线路下穿既有公路、铁路施工将越来越频繁,如何安全穿越既有线,保证下穿过程既有线行车安全,将是隧道施工的重点、难点。暗挖隧道下穿既有线施工除自身存在高风险之外,如何控制既有线行车的安全性亦是施工控制的重中之重,相关施工工艺及控制措施将会在今后同类施工中得到广泛的应用。结合珠三角城际轨道交通工程东莞至惠州城际铁路下穿广深准高速铁路施工实例,将相关工程技术总结整理,供类似工程参考。
With the rapid development of intercity rail transit projects among major cities in the region, the distribution of railway network is continuously improved. The newly built intercity railway lines pass under the existing highways and the construction of railways will be more and more frequent. How to safely cross the existing lines to ensure Under the process of existing line traffic safety, will be the focus of the tunnel construction, the difficulty. Undercutting tunnel under existing construction line in addition to its own high risk, how to control the safety of existing line traffic is also the construction control of the most important, related construction technology and control measures will be similar in the future construction of a wide range of application. With the Pearl River Delta intercity rail transit project from Dongguan to Huizhou intercity railway under the Guangzhou-Shenzhen-Zhungen high-speed railway construction examples, the relevant engineering and technical summary, for similar projects for reference.