摘要
结合隧址地质特征,运用有限元数值分析方法,对比分析了北固山隧道出口段在采用不同开挖工法条件下围岩和支护结构受力与变形规律的差异,同时结合施工工序和工程特点对不同开挖方法的选取进行了分析比选,最后得出了北固山隧道出口段采用弧形导洞预留核心土法开挖是符合隧道设计规范、又满足围岩及支护稳定性要求的施工方案,且施工工艺简易,经济。研究成果将对同类地质条件下隧道的设计和施工具有指导意义。
In light of the geological conditions of the Beigushan tunnel, the differences of force applied on the surrounding rock and the supporting structure, as well as the relative deformation law concerning the exit section, by different construction methods were compared. An analysis was performed and a construction method was selected based on the construction procedures and characteristics. It was concluded that the Beigushan tunnel should be constructed by the method of arched heading with reserved core soil, since this scheme not only complies with tunnel design specifications and meets the requirements of stability, but is also simple and cost effective.
出处
《现代隧道技术》
EI
北大核心
2013年第1期67-72,86,共7页
Modern Tunnelling Technology
基金
国家自然科学基金(No.51278423)
关键词
浅埋隧道
仿真模型
开挖工法
围岩应力
支护结构
Shallow tunnel
Numerical simulation
Excavation method
Rock stress
Support structure
