芦山地震中公路边坡崩塌形成机理分类研究  

Classification and Study of Slope Collapse Induced by Lushan Earthquake

作　　者：高延超[1,2] 南帅 徐如阁[1] 

机构地区：[1]中国地质调查局成都地质调查中心,成都市610081 [2]中国科学院水利部成都山地灾害与环境研究所,成都市610041 [3]中国建筑西南勘察设计研究院有限公司,成都市610081

出　　处：《公路》2014年第2期71-76,共6页Highway

基　　金：科技部基础研究专项;项目编号2011FY110100

摘　　要：G318线天全段地质环境条件较差,属于崩塌高易发区,在"4.20"芦山地震中受地震影响公路边坡共发生26处崩塌。按照形成机理,该段崩塌分为滑移式崩塌、拉裂式崩塌、倾倒式崩塌、错断式崩塌等4类,其中以滑移式崩塌及拉裂式崩塌为主。崩塌多发育在花岗岩及泥岩砂岩互层中。受余震及降雨的影响,G318线天全段的崩塌将进入高发期。Tianquan section of China National Highway 318 is a high collapse-prone area. During the Lushan Earthquake on April 20, 2013, 26 collapses are accounted along the 91kin long highway by investigation after the earthquake. Based on the comprehensive study on the collapses disaster, the mechanisms about how collapses happened are classified as four types： sliding collapse, tensile crack- falling collapse, toppling collapse and shearing collapse. Most of the collapses are formed in the granite and sandstone. The post-earthquake collapses will occur frequently along the highway in a very long time under the influence of rainfall and aftershock.

关 键 词：崩塌 芦山地震 形成机理 分类 

分 类 号：P642.21[天文地球—工程地质学]