土工基础

›› 2012, Vol. 26 ›› Issue (6): 65-69.

• 工程实录 • 上一篇    下一篇

震后公路建设面临的地质灾害问题与探讨

姜 贤   

  1. （温州市高速公路工程有限公司；温州市绕城高速公路工程建设指挥部，浙江温州 325000）
  • 收稿日期:2012-02-27 出版日期:2012-12-20 发布日期:2012-12-25
  • 作者简介:姜贤（1979-），男，工程师，毕业于厦门大学，研究方向为高速公路工程建设管理。

Geological Hazards and Mitigation Methods in Highway Reconstruction after Wenchuan Earthquake

JIANG Xian   

  1. （Wenzhou Highway Engineering Co., Ltd ；Wenzhou City Highway Construction Committee, Wenzhou  Zhejiang 325000）
  • Received:2012-02-27 Online:2012-12-20 Published:2012-12-25

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。

关键词: 汶川地震, 公路重建, 地质灾害, 治理方法

Abstract: 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.

Key words: Wenchuan Earthquake, Highway Reconstruction, Geological Hazards, Mitigation Methods