摘要
雪峰山隧道为上海～瑞丽国道主干线湖南省邵阳～怀化高速公路上最大的控制性工程，全长约7km，最大埋深约850m，为典型的长大越岭公路隧道，曾一度担心岩爆问题突出，目前已全线贯通。本次研究通过现场洞壁应力测试、MTS岩石力学特性实验、隧道内地质观测分析并结合课题组以往总结的经验判据（σθ／Rb）对其岩爆问题从岩石材料本身的内在力学机制和外部条件两方面进行综合分析预测得出：围岩岩石材料本身虽具备发生岩爆的内部条件，但最终发生岩爆还是取决于外部应力状况和外部条件，这与实际相符，并为今后类似工程提供了一套研究方法和借鉴作用。
The Xuefeng Mountain Tunnel under construction is the largest controlling project of Shao-Huai Expressway. The length of the tunnel is about 7 km and the largest thickness of its overlay is about 850 m,it is a typical Thru Mountain Long Highway Tunnel,which is worried about its serious rockburst problems. In this paper, by virtue of methods such as the surrounding rock surface stress test,MTS rock mechanics tests and geology observation and analysis etc, and combined with several experience judge methods （σθ/Rb）, the comprehensive analysis prediction of rockburst problem from the rock interior mechanics essence and exterior conditon are given. Rock itsself contains the conditon of taking place rockburst,but last rockburst depends on the exterior stress state and conditon. This is in accordance with practice,and also provides a set of research method and an good example for other similor engineerings.
出处
《公路》
北大核心
2008年第1期204-208,共5页
Highway
基金
交通部西部交通建设科技项目“雪峰山特长公路隧道关键技术研究”(200331879802)
国家重点基础研究发展规划(973)项目“灾害环境下重大工程安全性的基础研究”(2002CB412705,2002CB412707)
国家自然科学基金委重点项目“深部岩体工程特性研究”(50639100)
关键词
公路隧道
岩爆
洞壁应力测试
MTS实验
经验判据
预测
highway tunnel
rockburst
surrounding rock surface stress test
MTS test
experience judge methods
prediction
