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滑坡是斜坡岩土体沿着贯通的剪切破坏面所发生的滑移地质现象,是仅次于地震和洪水的一种严重的地质灾害。云南省西部的滑坡尤为严重,本文依托云南省泸水县1∶50 000地质灾害详细调查项目对泸水县境内七棵树滑坡做了整体全面的分析。在实地勘察、打钻的基础上,运用极限平衡理论对该滑坡进行稳定性分析,采用折线型滑面、传递系数法进行计算。由于影响滑坡的因素较多,为了得到可靠的结论,本文选取了3条剖面且同时通过3种不同的工况进行计算。计算分析结果表明:七棵树滑坡在天然状态条件下处于基本稳定-稳定状态,暴雨状态下Ⅰ剖面处于欠稳定状态,地震状态Ⅰ剖面、Ⅲ剖面处于欠稳定状态。综合相关结论及该地区人文环境提出了相应的治理方案。
Landslide is a slippery geological phenomenon that occurs along the shear failure plane of slopes and rocks, and is a serious geological disaster next to earthquakes and floods. The landslide in the western part of Yunnan Province is particularly serious. Based on the 1: 50,000 geological disaster detailed investigation project in Lushui County, Yunnan Province, this paper makes a comprehensive and comprehensive analysis of the Qashuashu landslide in Lushui County. On the basis of field survey and drilling, the stability analysis of this landslide is made by means of limit equilibrium theory, and the calculation is made by means of the broken line sliding surface and the transfer coefficient method. Due to many factors affecting the landslide, in order to get reliable conclusions, this paper selected three sections and at the same time through three different conditions for calculation. The calculation and analysis results show that the QKK landslide is in a basically steady-state state under natural conditions, and the I-section is in an unstable state under rainstorm conditions. The seismic section Ⅰ and section Ⅲ are in an unstable state. Based on the relevant conclusion and the human environment in this area, the corresponding governance plan is put forward.