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本文详尽地阐述了新宇津隧道在开挖中遇到的膨胀性围岩和可燃性气体两大难题,及通过地质调查对围岩进行分类分级、采取相应具体措施和各种辅助工法,使隧道因膨胀性围岩造成的位移、变形减小到最小程度。通过对围岩的探测分析、制定了在可燃性气体环境下进行施工的各种措施和规章制度,使隧道得以安全、顺利贯通。对今后隧道开挖遇到类似地质时的施工,具有很大的参考价值。
This article elaborates two major problems such as expansive surrounding rock and combustible gas encountered in the excavation of Xinyu-Jin Tunnel, and classifies and classifies the surrounding rock by geological survey. Concrete measures and various auxiliary methods are adopted to make the tunnel Deformation due to the expansion of the surrounding rock deformation to a minimum. Through the detection and analysis of the surrounding rock, various measures and rules and regulations have been formulated for the construction under flammable gas environment so that the tunnel can be safely and smoothly penetrated. In the future tunnel excavation encountered similar geological construction, has great reference value.