土工基础

›› 2015, Vol. 29 ›› Issue (3): 10-13.

• 工程实录 • 上一篇    下一篇

209国道K1661+370~420段滑坡稳定性分析及治理措施

龚 勇1,符贵军2,任伟中2   

  1. (1.兴山县公路管理局， 湖北兴山 443700；2.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071）
  • 收稿日期:2014-06-06 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:龚 勇（1964-），男，助理工程师，研究方向为公路养护与灾害防治。

The Landslide Stability Analysis and Treatment Measures of K1661+370~420 on National Road 209

GONG Yong1，FU Guijun2，REN Weizhong2   

  1. (1. Xingshan County Highway Administration, Xingshan, 443700；
    2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock & Soil Mechanics, Wuhan, 430071)
  • Received:2014-06-06 Online:2015-06-20 Published:2015-06-26

摘要： 209国道K1661+370~420段滑坡位于湖北省宜昌市兴山县境内，受强降雨作用，坡体产生了较大变形，出现了古滑坡复活现象。通过地质条件分析，阐明了滑体的破坏机理，指出裂隙扩张、大气降水和人工扰动为其主控因素，并采用极限平衡法对坡体进行了稳定性评价，提出了钢轨桩与挡土墙相结合，辅以排水措施的加固方案。结果表明，滑坡经治理后达到稳定状态，该方案对本地区滑坡的防治具有借鉴意义。

关键词: 古滑坡, 稳定性, 钢轨桩

Abstract: The landslide between Station K1661+370 and 420 of State Route 209 is located in Xingshan County, Yichang City. This ancient landslide was reactivated by the excessive precipitation. The landslide mechanisms are discussed based on the thorough understanding of the site geological conditions. The main triggering factors identified are: expansion of the fissures; precipitations; and human activities. The sliding body was evaluated with the limit equilibrium method. The mitigation measures are a combination of railtrack pile supported retaining wall with the surface drainage.  The construction results indicate that the landside treatment measure is successful.

Key words: Ancient Landslides, Slope Stability, Rail Track Piles