福建省周宁县马头山滑坡成因分析及治理研究

文章在分析福建周宁县马头山滑坡的地质环境条件的基础上,阐述了滑坡的形态、滑面滑床特征和变形特征以及气象水文、地形地貌和人类工程活动等内外营力对该滑坡的影响,并对滑坡的形成过程和机理进行了详细分析。研究结果表明,该滑坡形成过程及机理为：开挖-滑带土浸水软化、抗剪强度降低或丧失-坡面、坡顶开裂和坡脚剪切破坏-剪切破坏区向上发展与后缘张裂隙贯通-滑面贯通、滑坡产生。根据定量分析计算,在连续降雨或暴雨条件下,该滑坡整体超过临界稳定状态而处于不稳定状态,滑坡可能继续失稳破坏。根据滑坡特征,提出了采取削坡减载、排水及坡面防护的综合治理方案。

Cause mechanism and treatment scheme for landslide in matou Mountain of Zhouning County of Fujian

This paper introduced firstly geological condition of the landslide and then expounded the landslide configuration, characteristics of landslide surface and landslide bed, and the influence of climate, hydrological geological condition, landform and human engineering activities on the landslide. The formation process and mechanism of landslide were analyzed particularly, and the results includes five steps： excavating, landslide zone soil intenerated and shear strength decreasing or losing, slope surface upheaval and slope top crazing and shearing failure of slope foot, shearing failure area develops and connects with open crack of back part of landslide, land-sliding formation. According to quantitative methods, the slope is in the state of limit equilibrium at present. It is possible to slide fast under the influence of continuous rainfall or rainstorm ect.. It is suggested that the treatment techniques such as excavation for reducing the load, drainage, and surface protection should be taken for the landslide treatment.