某铁路顺层岩质路堑边坡的风险评估与防范研究

挖方施工使处于应力平衡状态的土(岩)体发生变化,影响开挖形成的土(岩)体路堑的稳定性,特别是顺层岩质路堑边坡的稳定性。针对某铁路顺层岩质路堑边坡工点的各种风险因素,首先采用专家调查法及层次分析法对风险因素进行风险评估与排序,其次通过模糊综合评判模型对该工点进行整体风险评价,最后结合风险评价准则,提出合理的风险防范对策并再次评估。通过风险防范后,由中等风险降为较低风险,保证了边坡稳定安全。

Research on Risk Assessment and Prevention of Cutting Slope in Bedding Rock Mass of a Railway

The excavation construction will change soil(rock)mass under balanced stressand affect the stability of the cutting of soil(rock)mass formed through excavation, especially, affectthe stability of cutting slope in bedding rock mass.Aiming at all risk factors in cutting slope in bedding rock mass of a railway, the expert investigation method and analytic hierarchy process are used firstly for risk assessment and risk factors sorting;and then, a fuzzy comprehensive evaluation method is utilized for whole risk evaluation of the workpoint;andfinally, combined with the risk evaluation criteria, some reasonable risk control counter-measures are proposed and assessment is made again.Through the risk prevention, the moderate risk is lowered to low risk, and the safety and stability of slope is ensured.