摘要
为研究公路隧道下穿对既有隧道衬砌和地表影响,以某隧道下穿工程为基础,利用三维有限差分方法建立公路隧道下穿既有隧道的数值计算模型,研究了不同隧道垂直净距对上部隧道衬砌变形和地表沉降的影响,得出新建公路隧道的合理位置。研究表明:增大隧道垂直净距能够合理控制地表及既有隧道的沉降,综合考虑隧道施工及各方面原因,隧道垂直净距在5~10 m左右为宜,新建公路隧道在施工中对既有隧道水平方向变形影响较小。本文对于浅埋地层下新建公路隧道下穿既有隧道的类似工程中,新建公路隧道的埋深和合理位置选择方面具有一定指导意义。
Further study the influence of highway tunnel underpass on the existing tunnel structure and surface,based on a tunnel underpass project,using three-dimensional finite difference method to establish highway tunnel in numerical calculation model,and the effect of vertical net distance between highway tunnel and existing tunnel on structural change and surface settlement of upper tunnel is studied,and the reasonable position of the highway tunnel is obtained.The results show that moderately increasing the net distance can reasonably limit the settlement of the surface and existing tunnels,but combined with the tunnel construction and various related reasons,it is recommended that the net distance between tunnels be limited to about 5 to 10m,new road tunnels have little impact on the horizontal deformation of existing tunnels during construction.This paper has certain guiding significance for the burial depth and reasonable location selection of new highway tunnels under shallow buried formations in similar projects where new road tunnels pass under existing tunnels.
作者
刘玉骞
王寅辰
姜涛
LIU Yu-qian;WANG Yin-chen;JIANG Tao(Hebei Institute of Architecture and Civil Engineering,Zhangjiakou,Hebei 75000)
出处
《河北建筑工程学院学报》
CAS
2022年第4期39-44,共6页
Journal of Hebei Institute of Architecture and Civil Engineering
关键词
公路隧道
正交下穿
既有隧道
数值模拟
road tunnel
orthogonal underpass
existing tunnel
numerical analysis
