Abstract：
In order to ease the traffic congestion in the Zhongliangshan tunnel section of the Chengdu-Chongqing Expressway, the particular section is to be expanded and renovated to increase its capacity. The cutting section to be widened is located above the Xinshuangbei tunnel of the Chongqing-Guiyang Railway, and the clearance distance between the bottom of the protection piles and the tunnel arch is only 4.3 m. In order to evaluate the impact of the cutting construction on the railway tunnel, this paper adopts the numerical analysis method to simulate the various construction steps of the renovated expressway above the railway tunnel, calculates the internal force and deformation of the railway tunnel at each construction stage, demonstrates the feasibility of the construction plan of the renovated expressway above the existing tunnel with small clearance distance, and prepares relevant protection measures, providing a basis for the review and smooth implementation of the plan.
LIU Hebing
.Study on the Impact of the Capacity Expansion and Renovation Project of the Chengdu-Chongqing Expressway on Xinshuangbei Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(3): 229-234
2021, Vol. 58 