三峡库区康家嘴滑坡破坏过程及演绎研究

PROCESS OF BREAKAGE AND DEDUCTION OF THE KANGJIAZUI LANDSLIDE IN THE THREE GORGES RESERVOIR REGION

三峡库区康家嘴滑坡是在其老滑坡泥石流的前缘堆积扇体中形成的新滑动变形体。滑体表面为第四纪风化土层,滑带为灰绿色粉质粘土或粘土,在降雨与库区蓄水的周期性浸泡作用下,饱和后蠕滑变形,处于欠稳定-极限稳定状态,亟需整治。本文针对其破坏过程及形态加以详细描述,并对滑坡的阶段性演绎过程加以追溯。在查清滑坡地质条件与发展趋势的基础上,通过经济对比分析,对康家嘴滑坡不同变形阶段提出了具有针对性的防治方案:在新滑坡体(强变形区)采用抗滑桩+排水沟+局部回填压脚、后部变形体采用抗滑桩+排水沟。经对滑体计算,该滑坡体处于稳定状态,达到了防灾减灾的目的。

The landslide, which is one of typical geological disasters, triggered by various factors. The Kangjiazui Landslide in the Three Gorges reservoir area formed in front of the alluvial fan in the old landslide debris flow and for the new sliding deformation. It has a Quaternary soil layer on the surface of the landslide mass. The sliding zone is celadon silty clay or clay. They had creep deformation after becoming saturation under the periodical soak of rainfall and the Three Gorges reservoir area sluice. The landslide was in the state of destabilization to limit stabilization and desiderated to prevent and cure. This paper gives a detailed description of the breakage process, appearances and the deduction process to take back into trace. The investigation clearly showed the landslide geological condition and the developing trend. It was analyzed the economy and advanced different deformation stages with targeted prevention programs. The preventive measures uses slide -resistant piles, tion in partial of new landslide mass （ strong deformation zone ） and in the drain ditch, and backfilling consolidaback of the landslide mass. The measures were slide -resistant piles and drain ditch. The calculation showed that it was in stable state. It also has some references to deal with some similar geological disasters.