摘要
2008年5月12日四川汶川发生8.0级大地震,造成了巨大的生命和财产损失。地震诱发了山体滑坡、崩塌、落石、危岩和泥石流等地质灾害,这些地质灾害主要沿主发震断裂带和河流、沟谷呈带状分布,且规模大、数量多、密度高、类型复杂。对地质灾害的基本情况进行了分类介绍,分析了各种地质灾害发育的主要特征。在降雨和其它条件的影响下,在近3～5年内各种地质灾害仍处于一个高发期,10年后才可能进入低发期,期间活跃期与平静期会交替出现。提出了震后公路选线的基本原则,并针对各类地质灾害的发育特征给出了治理方法,为震后公路重建工程提供参考。
A large earthquake measured Ms=8.0 occurred on May 12,2008 in Wenchuan County,Sichuan province.The earthquake caused a huge loss of lives and properties.At the same time,the earthquake casted numerous geological hazards such as landslides,sudden subsidence,falling rocks,unstable rock masses and debris flows.These geological hazards distributed along the main earthquake fault zones,main rivers,and valleys.Their features can be characterized as large quantity,high density and complicated types.The basic types of geological hazards are described in this paper.The main features of each were analyzed.It is concluded that,the geological hazards are still a high incidence in the last 3 to 5 years under the impact of rainfall and other adverse conditions.It will gradually become a relatedly low frequency 10 years later.The evolution trend of debris flow is that its activity intensity becomes from rapidly increase to progressively dormant.The active periods and dormant periods of debris flow alternate.The basic principles of post-earthquake highway alignment selection are proposed in the paper.Some mitigation methods are also proposed for each geological hazard.
出处
《土工基础》
2012年第6期65-69,共5页
Soil Engineering and Foundation
关键词
汶川地震
公路重建
地质灾害
治理方法
Wenchuan Earthquake
Highway Reconstruction
Geological Hazards
Mitigation Methods
