【摘要】 通过对汶川地震前后国道317线汶川-理县段边坡现场调查资料的对比分析,研究了该路段边坡的主要破坏类型、分布特点和防治建议。研究表明破坏类型主要为坡面碎屑流、崩塌落石,但未造成沿线欠稳定边坡的整体破坏;此类灾害具有影响路段长、偶发性明显、发生部位难以精确确定等明显特点,并导致后期发生坡面碎屑流和稀性泥石流的发生风险大大增加且这一风险将长期存在;对于此类灾害,其防治宜遵循绕避为主,工程治理为辅的原则。更多还原

【Abstract】 Based on analysis of field investigation data of slopes Wenchuan-Lixian section at national highway No.317 before and after Wenchuan earthquake,this paper studied their main failure type,distribution characters and prevention suggestions.Research shows that the main types of slope failure are slope surface debris flow and stone falling.Those two kinds of failure bear characters of wide influence range,random and hardly detected location.Therefore,the prevention to those two kinds of failure should follow the principles of leaving enough buffer space first and then taking prevention measures.更多还原