红砂岩顺层岩质边坡开挖变形特性分析

红砂岩顺层岩体边坡由于胶结物质和风化程度的差异,其强度的变化较大,在开挖卸载、自重应力、爆破震动等作用下,极易发生变形破坏,影响边坡的施工进度。因此研究红砂岩顺层岩质边坡开挖变形特性十分有必要。以垄茶高速公路典型路堑边坡为依托,分析了红砂岩的物理力学性质,采用ADINA有限元软件计算开挖变形位移,将计算结果与开挖变形监测结果进行对比分析,所得计算位移量与实测位移量基本一致,验证了用ADINA中的Mohr-Coulomb材料模型计算红砂岩顺倾岩质边坡开挖变形位移的可靠性。

Analysis of Deformation Properties of Red Sandstone Bedding Rock Slope Excavation

Red sandstone bedding rock slope due to differences in cementing material and the de- gree of weathering, the intensity is larger, the excavation unloading, gravity stress, under the action of blasting vibration and so on, easy to deformation and failure, affect the slope of the construction schedule. Therefore, studies of red sandstone bedding rock slope excavation deformation characteristics is very nec- essary. In this paper, it＇ s based on typical highway cut slope of the high way of Long Cha, analysis of the physical and mechanical properties of red sandstone, the use of finite element software ADINA excavation deformation displacement calculation, the calculation results with the excavation deformation monitoring results were analyzed,and the resulting displacement of the calculation is consistent with the measured a- mount of displacement, to verify the model calculation of red sandstone with scaled the Mohr-Coulomb adina. The material along the dip the reliability of the deformation displacement of rock slope excavation