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为了系统认识冰冻极端天气条件下山岭公路岩质边坡稳定性问题,结合泰顺县山区公路岩质边坡冻融滑塌的实际案例,对冰冻极端天气条件下山岭公路岩质边坡的破坏机理及其灾害处置对策进行了深入研究。研究表明:冻胀与融解作用是岩质边坡破坏的主要机理;地形条件和地质构造是山区公路岩质边坡冻融滑塌的先决条件;边坡陡峻是岩质边坡冻融滑塌的重要因素;公路开挖爆破是岩质边坡冻融滑塌的人为因素;降雨是山区公路岩质边坡冻融滑塌的触发因素。采用减震爆破施工方法,可以极大地减小爆破对边坡岩体的破坏,降低冻融滑塌的可能性。采用刷坡、遮挡工程、拦截工程等,可以有效地防治冻融滑塌。
In order to systematically understand the stability of rocky slopes of mountainous highway in freezing extreme weather conditions, combined with the actual cases of freezing and thawing of rocky slopes of mountainous highway in Taishun County, the damage to the rocky slope of mountainous highway in freezing extreme weather conditions Mechanism and disaster disposal measures conducted in-depth study. The results show that frost heaving and thawing are the main mechanism of rock slope failure. Topography and geological structure are the prerequisites for freezing and thawing of rock slope in mountainous highway. The steep slope is the freezing and thawing of the rock slope ; Highway blasting is an artificial factor of freezing and thawing of rock slope; rainfall is the triggering factor of freezing and thawing of rock slope in mountainous highway. The use of shock-blasting construction method can greatly reduce the blasting of the rock mass destruction and reduce the risk of freezing and thawing slump. Brush slope, block engineering, blocking engineering, etc., can effectively prevent freezing and thawing slump.