Investigation of Deformation Influence on Throat Area of Highway Tunnel across the railway station

Abstract

Abstract In order to ensure that Baishiyi Tunnel, an control project passing through Zhongliang Mountain, successfully passes through the throat area of the North Railway Station, track deformation control standard is established (Vertical differential settlement≤3.5mm, subgrade settlement≤3.5mm). Based on survey data, engineering analogy and numerical simulation, the influence of different excavation procedures on the ground settlement and track structure deformation is analysed. The result shows the ground settlement and trend of the measurement points at the corresponding positions of the tunnel and track structure are basically the same. The maximum ground settlement above the left line tunnel is 7.0mm, and the minimum ground settlement is 2.4mm. The ground directly above the grain dedicated line is a key part to be paid attention to in settlement control.