道改隐形桥梁式盖挖车站施工对既有轨道的影响研究

Study on Influence of Road to Invisible Bridge Covered Excavation Subway Station Construction on Existing Track Structure

盖挖法施工被广泛应用于城市的地下工程建设中,但在路网复杂、地形起伏大的山地城市,传统盖挖法存在路面结构利用率低下,施工对城市交通影响较大等问题。本文以重庆轨道环线四公里站为例,依据盖挖逆作法,将道改桥与其有机结合,设计了道改隐形桥梁式新型盖挖法。与传统的盖挖法施工不同,本文的盖挖施工具有独创性,是道改桥和盖挖法的综合应用,可理解为暗埋搭设一座隐形桥梁。本文研究了道改隐形桥梁式盖挖法施工地铁车站过程中,对既有轨道结构影响。并将数值模拟值与实际监测值进行对比分析,确保新型盖挖法施工过程中既有车站的安全性和可靠性。

Covered excavation is widely used in urban underground engineering construction.In mountainous cities with rugged terrain,road network is complex.In traditional covered excavation,the utilization rate of pavement structure is low.It has a great impact on traffic.Taking Chongqing Railway Sigongli Station as an example,based on semi-reversed construction method,combined with road to bridge method,this paper presents a new type of covered excavation called road to invisible bridge covered excavation.The new method is similar to the construction of an invisible bridge,which is different from the general method of cover excavation.Studying on the influence of the existing track structure on the existing track structure during the construction of the subway station with the new method.Comparing numerical values with actual monitoring values to ensure the safety and reliability of the existing station during the construction process.