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鹧鸪山隧道位于四川省马尔康县梭磨乡王家寨村,是高寒高海拔特长高速公路隧道。隧道出口斜坡在施工阶段发生拉裂变形,危及隧道施工安全和人员安全。本文结合鹧鸪山隧道出口段的地质环境资料和现场勘察结果,介绍了出口段斜坡的形态特征、结构特征和变形特征,从地质条件、降雨和人类工程活动等3个方面分析了出口段斜坡的变形原因和后续发展趋势,并采用剩余推力法对出口段斜坡的稳定性进行了定量计算。对出口段斜坡变形进行综合评价,在计算分析的基础上,提出了抗滑桩、注浆预加固和变形监测等综合处治措施,为高寒高海拔高速公路隧道洞口位置的选取和预加固提供借签。
Partridge Mountain Tunnel is located in Malcolm County, Sichuan Province, Wang Township shuttle mill village, is alpine high-altitude highway tunnel. Tunnel exit ramp occurred in the construction phase of tensile deformation, endangering the construction of the tunnel safety and safety of personnel. Based on the geological environment data and site survey results of the exit section of the Partridge Mountain Tunnel, this paper introduces the morphological characteristics, structural features and deformation characteristics of the exit section slope. The slope of the exit section is analyzed from three aspects of geological conditions, rainfall and human engineering activities. The causes of deformation and the follow-up trends, and the remaining thrust method for the stability of the export section of the slope was calculated. On the basis of calculation and analysis, the comprehensive treatment measures of anti-slide piles, grouting pre-reinforcement and deformation monitoring are put forward to provide a reference for the selection and pre-reinforcement of tunnel entrance in high-altitude and high-altitude expressway sign.