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震后地震区公路沿线发育的地质灾害主要以崩塌灾害为主,不仅发生频率高,而且规模大、破坏强。根据实地调研震后公路沿线崩塌灾害的发育特征,选择对崩塌识别的主要影响因素进行了分析。选取主控结构面倾角、地形坡度、结构面特性、凹腔发育特征、岩性及组合特征、岩体结构和震裂损伤程度7个因素作为崩塌识别的基本指标,采用层次分析法半定量地研究了指标之间相互作用关系对崩塌识别的影响权重和指标重要性程度。提出了公路崩塌识别的崩塌判别指数CDI方法,建立了震后公路崩塌的识别体系。该识别体系运用到公路沿线崩塌隐患点的定量评价与现场的定性分析总体一致,表明该识别体系是对震后公路崩塌进行快速识别的有效方法。
After the earthquake, the geological disasters that developed along the highway in the earthquake zone are dominated by collapsing disasters, which not only occur frequently, but also have large scale and strong destruction. According to the field investigation of the development characteristics of the collapse hazard along the highway, the main influential factors of the collapse identification are analyzed. Seven main factors such as slope of main control structure, topographic gradient, structural plane characteristics, cavity development characteristics, lithology and assemblage characteristics, rock mass structure and degree of damage of rock fragmentation are selected as the basic indicators of collapse identification. Analytical hierarchy process The influence of the interaction between the indicators on the collapse identification and the importance of the index are studied. Proposed the CDI method of collapse identification index of highway collapse identification and established the identification system of highway collapse after earthquake. The quantitative evaluation of the identification system applied to the point of collapse along the highway is generally consistent with the qualitative analysis in the field, indicating that the identification system is an effective method to quickly identify the post-earthquake highway collapse.