福建西北地区典型边坡稳定性评价及预控措施

Stability Evaluation and Pre-Control Methods for Typical Slope in Northwest Fujian

摘要: 为探讨福建三明某公路边坡的稳定性影响因素及其预控措施，基于岩土工程勘察，分析了该滑坡区的地质环境和滑坡基本特征，讨论了滑坡的影响因素及形成机制，对滑坡进行了监测和稳定性分析，结果表明：该滑坡场地内岩土体组分较多，地质条件复杂，属中厚层中型牵引式岩土质滑坡，其防治工程等级为二级；初步判定场地类别属II类，特征周期0.35 s；滑坡治理应考虑滑坡类型成因、滑坡形态、工程地质和水文地质条件、滑坡稳定性、工程重要性、施工影响等因素，宜采用排水、削方减载、支挡、锚固等工程措施进行综合治理，并加强对滑坡区地表裂缝、地下水位及位移的监测，以保障施工安全。

Abstract: In order to discuss stability affecting factors of a highway slope in Sanming city, Fujian Province, and to present its pre-control measures, based on the geotechnical investigation results, the geological environment and the basic characteristics of the landslide are analyzed; the influencing factors and the formation mechanism of the landslide are discussed; the monitoring and stability analysis of the landslide are carried out. The results show that there are more soil components in the landslide site; and the geological condition is complex; the landslide is middle or thick middle size tractive rock landslides; and its control engineering grade is the second grade. The preliminary classification of site category belongs to class II and characteristic cycle is 0.35 s. The landslide control should consider the causes of landslides, landslides shape, engineering geology and hydro-geological conditions, landslide stability and engineering importance etc. In order to ensure the safety of construction, the monitoring of surface cracks, groundwater level and displacement in the landslide area should be strengthened, and the comprehensive treatment of drainage, chipping, load reduction, support and anchorage methods should be adopted to pre-control the landslide.