山区铁路支挡结构安全保障与韧性提升-《高速铁路技术》

文章信息/Info

Title:: Safety Guarantee and Resilience Improvement of Railway Retaining Structure in Mountainous Areas

Author(s):: WEI Yongxing; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: retaining structure|safety risk|quantitative identification|resilience improvement|technical system

摘要:: 文章针对山区铁路常用的5类支挡结构,围绕支挡结构安全风险识别评估、支挡结构极限状态设计、支挡结构安全性能提升开展了系统的试验研究,提出了支挡结构安全风险"四层次、多手段"量化识别与评估方法,构建了以"风险识别-量化评估-综合防控"为核心的支挡结构安全风险识别与防控技术体系,建立了基于风险识别、参数自洽的支挡结构极限状态设计方法,形成了山区铁路支挡结构安全保障与韧性提升成套技术,支撑了西南山区沪昆、贵广、成贵等7 000多公里铁路建设。文章成果可为山区铁路(公路)建设提供指导和借鉴。

Abstract:: For five types of retaining structures commonly used in mountain railways, this paper carried out systematic experimental research on safety risk identification and evaluation of retaining structures, limit state design of retaining structures, and safety performance improvement of retaining structures. It puts forward a "four-level, multi-means" quantitative identification and evaluation method for safety risks of retaining structures, and constructs a technical system of safety risk identification and prevention and control of retaining structures with "risk identification-quantitative evaluation-comprehensive prevention and control" as the core. This paper further establishes the limit state design method of retaining structure based on risk identification and parameter self-consistency, and forms a complete set of technologies for safety guarantee and toughness improvement of railway retaining structure in mountainous areas, which supports the construction of more than 7,000 kilometers of railways in southwest mountainous areas such as Shanghai-Kunming, Guiyang-Guangzhou, and Chengdu-Guiyang railways. The results of this paper can provide guidance and reference for the construction of railways (highways) in mountain areas.