舟山市定海区位于我国东南沿海地区,雨量充沛,经常发生强降雨,在这一过程中部分边坡发生失稳破坏,为探究瑞金医院边坡破坏机制,研究采用GeoStudio软件建模分析,分析降雨、土的抗剪强度参数和覆盖层厚度对边坡稳定性的影响。结果显示:边...舟山市定海区位于我国东南沿海地区,雨量充沛,经常发生强降雨,在这一过程中部分边坡发生失稳破坏,为探究瑞金医院边坡破坏机制,研究采用GeoStudio软件建模分析,分析降雨、土的抗剪强度参数和覆盖层厚度对边坡稳定性的影响。结果显示:边坡土体在天然状态下粘聚力c和内摩擦角φ对于边坡稳定性的贡献度基本一致,在100 mm/d的降雨持续影响下,粘聚力降低幅度大于内摩擦角,由于下覆基岩对上部覆盖层的支撑作用,使得整体边坡土体在降雨后仍能保持稳定,而临空面附近土体处于饱和状态,抗剪强度已降低到无法抵抗其自重应力,导致失稳破坏。Dinghai District of Zhoushan City is located in the southeast coastal area of China, with abundant rainfall and frequent heavy rainfall. In this process, some slopes are destabilized and damaged. In order to explore the failure mechanism of Ruijin Hospital slope, GeoStudio software is used for modeling and analysis, the effects of rainfall, soil shear strength parameters and overburden thickness on slope stability were analyzed. The results show that the contribution of soil cohesion c and internal friction Angle φ to the stability of slope is basically the same, under the continuous influence of 100 mm/d rainfall, the reduction of cohesion is greater than the internal friction Angle. Due to the supporting effect of the underlying bedrock on the upper overlying layer, the overall soil mass of the slope can still maintain stability after rainfall, while the soil near the free surface is in a saturated state, and the shear strength has been reduced to the point that it cannot resist its own weight stress, resulting in instability and failure.展开更多
文摘舟山市定海区位于我国东南沿海地区,雨量充沛,经常发生强降雨,在这一过程中部分边坡发生失稳破坏,为探究瑞金医院边坡破坏机制,研究采用GeoStudio软件建模分析,分析降雨、土的抗剪强度参数和覆盖层厚度对边坡稳定性的影响。结果显示:边坡土体在天然状态下粘聚力c和内摩擦角φ对于边坡稳定性的贡献度基本一致,在100 mm/d的降雨持续影响下,粘聚力降低幅度大于内摩擦角,由于下覆基岩对上部覆盖层的支撑作用,使得整体边坡土体在降雨后仍能保持稳定,而临空面附近土体处于饱和状态,抗剪强度已降低到无法抵抗其自重应力,导致失稳破坏。Dinghai District of Zhoushan City is located in the southeast coastal area of China, with abundant rainfall and frequent heavy rainfall. In this process, some slopes are destabilized and damaged. In order to explore the failure mechanism of Ruijin Hospital slope, GeoStudio software is used for modeling and analysis, the effects of rainfall, soil shear strength parameters and overburden thickness on slope stability were analyzed. The results show that the contribution of soil cohesion c and internal friction Angle φ to the stability of slope is basically the same, under the continuous influence of 100 mm/d rainfall, the reduction of cohesion is greater than the internal friction Angle. Due to the supporting effect of the underlying bedrock on the upper overlying layer, the overall soil mass of the slope can still maintain stability after rainfall, while the soil near the free surface is in a saturated state, and the shear strength has been reduced to the point that it cannot resist its own weight stress, resulting in instability and failure.
