摘要
在不良地质段的铁路隧道洞口处,经常会发生坍方、落石和泥石流等自然灾害,若不能有效治理或防范,将为高速行车安全造成不可忽视的后果。为此,提出不良地质段大跨度桥梁—车站—明洞合建方案优化研究方法。以成兰铁路榴桐寨隧道明洞和龙塘车站合建工程为例,优化分析不良地质段的大跨度明洞—车站合建结构。以结构形式和充填材料为变量,进行方案优化比选,评价结构安全性。基于理论计算和室内抗压试验,利用ANSYS软件开展数值模拟,对比优化结构模拟结果和试验数据,验证了合建方案优化的可行性,为大跨度明洞合建结构设计、施工提供可靠的依据。
Portal sections of railway tunnels in unfavorable geological areas are frequently subjected to natural disasters such as collapses,rockfalls,and debris flows.Failure to effectively mitigate these hazards may severely compromise high-speed railway operational safety.This paper proposes an optimized design methodology for integrated long-span bridge-station-open cut tunnel structures in such challenging geological conditions.Using the integrated construction project of the Liutongzhai Tunnel and Longtang Station on the Chengdu-Lanzhou Railway as a case study,the structural configuration of the long-span integrated system is systemati-cally optimized.Through comparative analysis of structural forms and backfill materials,the structural safety is evaluated.Theoretical calculations and laboratory compression tests are combined with ANSYS-based numerical simulations to validate the feasibili-ty of the optimized integrated scheme by comparing simulation results with experimental data.The findings provide reliable refer-ences for the design and construction of long-span open cut tunnal integrated structures.
作者
任君
Ren Jun(China Railway Tunnel Group Third Engineering Co.,Ltd.,Guangzhou 511466,Guangdong,China)
出处
《西部探矿工程》
2025年第11期180-186,共7页
West-China Exploration Engineering
关键词
不良地质
明洞
合建结构
优化分析
unfavorable geology
open cut tunnel
integrated structure
optimization analysis
