重庆市北碚区毛背沱滑坡地质特征与稳定性评价研究

Study on the Formation Mechanism and Stability of Maobeituo Landslide in Beibei District,Chongqing City

位于重庆市北碚区,龙凤溪河南岸的毛背沱滑坡,体积约73.5×104 m3。目前滑坡体正处于蠕滑变形阶段,尚未形成连续滑动面。本文在深入分析滑坡体的地质特征、构造特征、变形特征的基础上,对滑坡的成因机制和影响因素进行了深入研究,并采用传递系数法对滑坡体稳定性进行评价和预测。研究表明,滑坡稳定性计算结果与其变形现象是一致的,近年来在雨季变形不断加剧,在库水位涨落和暴雨的共同作用下,可能发生整体滑移。最后,根据滑坡的成因机制与影响因素,对滑坡的治理方案进行了初步探讨。

Maobeituo landslide lies in the slope of southern bank of Longfeng Stream in Beibei District, Chongqing City with a volume of about 73.5×104 m3. It is in the state of creeping deformation and the continuous slip surface not yet formed. On the basis of analyzing in depth on the geological characteristics, structure characteristics and deformation features of the landslide, the authors study the formation mechanism and influential factors in depth, and make the evaluation and prediction of stability by using the transfer coefficient method. The slope stability calculation results are uniform with the deformation phenomena of landslide. This landslide may be dangerous in cases of water level＇s sudden increase and drawdown of the Three Gorges Reservoir area and longer and stronger rainstorms. Finally, according to assessment results and influential factors, this paper discusses the countermeasures against the landslide.