通过滑坡变形特征分析其稳定性及定量计算的对比研究

青海省隆务镇西山12~#滑坡的坡脚建有该镇相当一部分行政机关、学校、部队以及宗教寺院,目前滑坡体处于变形状态,严重威胁坡脚居民的生命财产安全。通过对12~#滑坡体变形特征的统计,研究分析其滑动破坏机理:即滑动破坏的主要原因是水和人类工程活动的作用以及与滑坡体特殊内在因素的相互配合,并且定性得出了目前该滑坡天然工况下及暴雨工况下的稳定状态。同时,根据滑带土室内试验及结合反演计算确定出滑坡的抗剪强度参数,通过折线型滑动面的计算模型,计算出不同荷载工况下滑坡的稳定性,通过对比,定性分析结果与定量计算结果一致。

Comparative Study on the Landslide Stability based on Deformation Characteristics and Quantitative Calculation

There are administrative organizations ,schools ,troops and religious monasteries located at the foot of the 12#landslide on the West Mountain of Wulong County ,Qinghai province .This landslide currently is in a deformation state , which is threatening the safety of the residents and property .In this paper ,the deformation characteristics of the 12#landslide are analyzed .It was found that the mechanism of sliding failure was mainly resulted from the interaction between the extrinsic factor of the landslide and the effects of water and human engineering activities .The steady state of the land-slide under natural conditions and heavy rain conditions was deduced qualitatively .The shear strength parameters of the landslide were determined according to the indoor experiment and the inversion calculation .The stability of the landslide under different load conditions was calculated by using the calculation model of polyline sliding surface .By contrast ,it was found that the qualitative analysis results are consistent with the quantitative calculation results .