某路堑边坡崩塌地质灾害稳定性评价及防治对策

A Geological Disaster Induced by Collapse of a Cutting Slope:Stability Evaluation and Prevention Measure

某市主要灾害性天气为暴雨及热带气旋,结合当地生产建设经验,灾害性天气是诱发地质灾害的重要因素,区内岩土层种类较简单,岩体节理裂隙发育,且同坡向结构裂隙发育,易软化崩解,工程地质条件复杂程度为复杂。对灾害特征及稳定性分析,该边坡的破坏模式以岩土体顺层滑动及岩土体沿节理裂隙组合破裂面滑移崩塌2种方式,崩塌边坡稳定性定性分析为欠稳定状态,再次发生的可能性较大。防治方案应采取支挡、排水工程,坡顶设置截水沟等措施。

A certain city is predominantly affected by disastrous weather conditions such as heavy rainfalls and tropical cyclones.From the perspective of local production and construction experience,these disastrous weather phenomena are key factors inducing geological hazards.The variety of rock and soil layers in the area is relatively simple,with rock joints and fissures developed in the same slope direction,which are prone to softening and collapse.The complexity of the engineering geological conditions is categorized as complex.According to the disaster characteristics and stability analysis,the failure modes of the slope include bedding sliding of rock-soil mass and sliding collapse of rock-soil mass along the combined fracture surface of joints and fissures.The qualitative analysis of the stability of the collapsed slope reveals an unstable.condition with a high likelihood of recurrence.The prevention and control plan should adopt measures such as bracing and drainage projects,and the setting of water interception ditches at the top of the slope.