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变形速率比值判别法是应用锚喷支护初期洞周收敛量测数据,即时判断隧道围岩稳定性的定量判据。猫山公路隧道地质条件复杂,跨度大,施工中险情多,隧道工程塌方事故多见,应用变形速率比值判别法取得成功。特别是大塌方段的实践证明,如果坚持按照此判据进行加固处理,能够避免塌方。猫山隧道首次实现施工中即时(逐日)定量地判别围岩稳定性与支护效果,并对变形速率比值法预报险情与成功处理的实用价值做了比较全面的验证。
Deformation rate ratio discrimination method is the application of the initial shot hole and bolt support the convergence of the measured data, real-time judge the stability of the tunnel surrounding rock quantitative criteria. The geological conditions of the Maoshan highway tunnel are complex, with large span, many dangers in construction, and many landslide accidents in the tunnel project. The application of the rate of deformation rate discrimination method has achieved success. In particular, the collapse of the section of the practice proved that, if insisted on strengthening the processing in accordance with this criterion, to avoid landslides. For the first time, the stability of surrounding rock and its supporting effect were quantitatively and quantitatively identified in the construction of Maoshan tunnel for the first time. The practical value of the method of forecasting the deformation rate and the successful treatment were compared and verified comprehensively.