【摘要】 根据对该滑坡的变形破坏特征及形成条件分析,其属滑移-拉裂型滑坡。在漫长地质历史时期,经受诸如地震、自重应力,构造应力、卸荷变形、降雨以及地下水等内外地质作用因素,斜坡岩体沿软弱结构面发生滑移变形,随着剪裂面上的拉应力集中而产生拉裂缝,一旦破坏面贯通,则导致滑坡破坏。变形发展可能具有间歇性。通过参数反演,对滑坡的稳定性进行了定量评价。从评价结果可见,在天然及暴雨情况下,滑坡均处于稳定状态。而在考虑地震时,其稳定性迅速降低,基本处于不稳状态。因此,对该大型滑坡进行合理的评价,科学的预测就显得非常必要。结合西南某滑坡的形态、结构特征,分析滑坡的形成机制;在成因机制分析基础上,采用不平衡推力法对该滑坡天然状态及不利组合条件下的稳定性进行评价,为滑坡治理设计提供了重要的地质依据。更多还原

【Abstract】 According to analysis of the landslide′s transform,breakage character and forming condition,it shows that the landslide belongs to sliding-tension type.In the long geological history suffering from such as earthquake,gravitation,construct stress, rainfall and groundwater action etc.the slope slided along the weak structural surface, and the cracks occoured with the draught stress concentration.Once the breakage surface is transfixed,the slope will slide down.The development of transforming may be intermittance.By parameter anti deducing,the stability of the slippery slope is evaluated quantitatively.And it comes to the conclusion that under natural and the rain-storm circumstance,the landslide is always in the stable state,while considering earthquake,its stability falls quickly to be at the unsteady state.According to the landslide’s conformation and construction characteristic,the formation mechanism of the landslide is analyzed.On the base of studying its formation mechanism,with the unbalance-push method the stability of the landslide is appraised under the natural condition and the combined disadvantageous condition.This process provides important geological bases for landslide control project.更多还原