湘西某红砂岩顺层滑坡风险评估

Risk assessment on one red sandstone bedding landslide in western Hunan

根据边坡风险识别的内容和常用的识别方法,建立红砂岩顺层边坡危险性评价的指标体系和量化标准,提出边坡失稳概率的确定方法,对边坡失稳易损性的构成和评价方法及边坡可接受的风险水平进行研究;结合工程实例,评估湘西某红砂岩边坡1号蠕滑变形体的滑坡风险,并采取移民拆迁、边坡整治、监测预报等风险管理措施。监测结果表明:所采取风险管理措施是可靠的。

Based on the contents and the commonly used methods of risk identification of the slope, the hazard assessment index system and quantitative criteria of red sandstone bedding slope were built. A method of determining the slope failure probability was put forward. The constitution and evaluation method of the vulnerability, and the acceptable level of risk of slope were studied. Combined with the engineering example, landslide risk of No. 1 creep deformation of some red sandstone slopes in western Hunan was assessmented. Demolition, slope treatment, monitoring forecast and other risk management measures were taken. The monitoring results show that the risk management measurements are effective.