寒区运营隧道冻害防治监测系统及应用

引起寒区冻害的因素十分复杂,隧道冻害预防与整治是一项复杂而艰巨的工作。以运营的准池铁路杀虎口隧道为工程依托,设计合理的冻害防治监测系统,通过对监测结果的分析,预测冻害的重点防治范围。研究结果表明:距洞口500 m范围内围岩有冻结可能,围岩最大冻结深度1.55 m,排水量较大区段位于下坡端进口段1 300 m范围内,因此冻害重点防治区段为进口端500 m范围内的软岩区段,预测冻害类型以衬砌渗漏水、衬砌开裂为主。

The Monitoring System for Tunnel Frost Damage Prevention and Treatment in Cold Region and Its Application

The tunnel frost damage prevention and treatment are arduous on account of multiple factors involved. Based on automatic temperature monitoring of Shahukou tunnel on Zhunchi railway,the author designs a reasonable monitoring system for tunnel frost damage prevention and treatment. The prioritized controlling range of frost damage is forecasted based on the analysis of the monitoring data. The results show that the maximum frozen depth is 1. 55 m,and the possible rock frozen area is located 500 m away from the tunnel portal,and the section with the largest amount of water flow is 1 300 m from the tunnel entrance. Therefore,the controlling section of frost damage is the soft rock section 500 m from the tunnel entrance and the frost damages are identified as the primary lining seepage and lining fracture.