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以赤水至望谟高速公路六冲河特大桥岸坡为研究对象,基于岸坡工程地质条件建立计算分析模型,运用有限元强度折减法,对工程所在区域织金岸C3错落体的错落面和滑动面综合力学强度参数进行了反演分析。利用已确定的节理强度和岩石抗剪断强度参数,结合不同的结构面贯通率的合理假设,考虑自然工况、暴雨工况和地震+暴雨工况的条件,经过大量的试算,得出了符合现场地质情况的错落面与滑动面综合强度参数,为进一步的岸坡稳定分析强度参数的取值提供了依据。
Taking Chishui-Wangmo Expressway Liuchuang River Bridge as a research object, a calculation and analysis model was established based on the engineering geological conditions of the bank slope. Using the strength reduction method of finite element method, The comprehensive mechanical strength parameters of sliding surface are analyzed inversely. Based on the reasonable joint strength and rock shear strength parameters, combined with reasonable assumption of different through rate of structural plane, taking into account the conditions of natural conditions, storm conditions and earthquakes + storm conditions, after a lot of trial calculations, According to the site geological conditions, the comprehensive strength parameters of the fault surface and the sliding surface provide the basis for further analysis of the slope stability.