土工基础

›› 2019, Vol. 33 ›› Issue (5): 591-594.

• 工程实录 • 上一篇    下一篇

程家坝滑坡形成机制及稳定性分析

杨 成1，李春江2，谯乾峰2   

  1. （1.中匠民大国际工程设计有限公司，成都 610041；2.核工业西南勘察设计研究院有限公司，成都 610061）
  • 收稿日期:2019-02-19 修回日期:2019-02-28 出版日期:2019-10-20 发布日期:2019-10-22
  • 作者简介:杨 成(1988-)，男，工程师，硕士，研究方向为水文地质、工程地质勘察（查）及岩土工程、地质灾害勘察（查）设计。

Development and Stability Analysis of the Chengjiaba Landslide

YANG Cheng1, LI Chunjiang2, QIAO Qianfeng2   

  1. （1.China Craftmen International Engineering Design Co,Ltd., Chengdu 610041；
    2.Nuclear Industry Southwest Survey & Design Institute Co. Ltd., Chengdu 610061）
  • Received:2019-02-19 Revised:2019-02-28 Online:2019-10-20 Published:2019-10-22

摘要： 程家坝滑坡位于荥经县龙苍沟镇经河村红光组，在分析该滑坡的地质背景条件及触发因素的基础上，对滑坡变形机制进行了分析，确定了该滑坡为一崩塌堆积体牵引式滑坡，且滑面同时受基覆界面、堆积体内部粉质黏土夹层层位和地下水位控制；并采用定性分析和定量计算，对该滑坡进行稳定性评价，确定了滑坡沿公路外侧临空面剪出的可能性不大,其他潜在滑面均存在失稳的可能；并在此基础上提供了治理方案建议，可为崩塌堆积体滑坡稳定性分析及治理措施的制订提供一定的借鉴。

关键词: 崩塌堆积体, 滑坡, 形成机制, 稳定性

Abstract: The Chengjiaba landslide site is in Hongguang Division of Jinghe Village, Longcanggou Town, Yingjing County. From the evlation of the geological conditions and triggering factors of the landslide, the mechanism of landslide deformation is analyzed in detail in this paper. The evaluation concluded that the pattern of this current landslide is a traction landslide in the colluvium deposits. The sliding surface is also controlled by the interface between the base and the sliding body, the position of silty clay interlayer in the accumulation body and the groundwater level. Both qualitative evaluation and quantitative analysis predictions are used to determine the stability of the landslide. The evaluation also concluded that the possibility of the landslide slip along the surface outside the highway was not likely. Other potential slip surfaces might not be stable. Landslide remediation measures in the colluvium deposit are also proposed in this paper.

Key words: Colluvium Deposit, Landslide, Landslide Development, Stability