摘要
针对矮拉山隧道凝灰岩地层大变形问题,分析其大变形破坏特征和影响因素,采用数值模拟与现场监测相结合的方法,优化支护参数与施工工法,确定合理的位移控制基准。研究表明:软弱凝灰岩、高地应力场等是主要影响因素,优化后的支护方案和环形开挖预留核心土工法能有效控制变形,解决隧道大变形难题。
Based on the large deformation of tuff stratum in Ailashan Tunnel,this paper analyzed the characteristics and influencing factors of its large deformation and failure,and the supporting parameters and construction method were optimized by combining numerical simulation with field monitoring,so as to determine a reasonable displacement control benchmark.The study shows that,soft tuff and high ground stress field are the main influencing factors,and the optimized support scheme and the construction method for circular excavation of reserved core soil can effectively control the deformation and solve the large deformation of Ailashan tunnel.
作者
舒永鸣
SHU Yongming(China Railway No.2 Engineering Group Fifth Engineering Co.,Ltd.,Chengdu 610075,China)
出处
《路基工程》
2025年第3期232-236,共5页
Subgrade Engineering
关键词
交通工程
凝灰岩
方案比选
支护参数
预留核心土
监控量测
安全性
traffic engineering
tuff
scheme comparison
support parameters
reserved core soil
monitoring measurement
safety
