新建隧道正交下穿既有城市道路稳定性研究  

Research on Stability of Orthogonal Undercrossing of Existing Urban Roads in Newly Built Tunnels

作　　者：郭郅威 Guo Zhiwei(Beijing Shoufa Expressway Construction Management Co.,Ltd.,Beijing,China)

机构地区：[1]北京市首发高速公路建设管理有限责任公司,北京

出　　处：《科学技术创新》2025年第1期182-185,共4页Scientific and Technological Innovation

摘　　要：为了评估新建隧道正交下穿既有城市道路的稳定性,本文通过分析货车车辆荷载作用下不同覆土厚度对隧道安全系数的影响,探讨了隧道与既有道路之间的相互影响机制。研究表明,当覆土厚度较浅时,隧道安全系数保持在安全水平以上,并随覆土厚度增加而上升,至5.72 m时达到峰值。随后,随覆土厚度进一步增加,安全系数虽有所下降但幅度较小。这表明隧道在正交下穿城市道路时具有良好的稳定性,但在浅覆土条件下与既有道路相互作用较为强烈。研究为隧道设计与施工提供了重要参考。In order to evaluate the stability of newly-built tunnels crossing existing urban roads orthogonally,this paper analyzes the influence of different soil cover thicknesses on the safety factor of tunnels under the load of truck vehicles,and explores the mutual influence mechanism between tunnels and existing roads.Research has shown that when the cover soil thickness is shallow,the safety factor of the tunnel remains above the safety level and increases with the increase of cover soil thickness,reaching its peak at 5.72 m.Subsequently,as the thickness of the soil cover further increases,the safety factor decreases slightly but to a smaller extent.This indicates that the tunnel has good stability when crossing urban roads under orthogonal conditions,but has a stronger interaction with existing roads under shallow soil cover conditions.The research provides important references for tunnel design and construction.

关 键 词：新建 隧道 正交 下穿 既有 城市道路 

分 类 号：U456[建筑科学—桥梁与隧道工程] U416[交通运输工程—道路与铁道工程]