某山区河道护岸滑坡原因分析及处理方法探讨

Analysis of Causes and Discussion on Treatment Methods of River Revetment Landslides in a Mountainous Area

摘要:

为揭示山区河道护岸滑坡的诱发因素，并提供科学可行的预防与处理措施，针对此类滑坡多由自然与人为因素共同作用引发的问题展开研究。结合南方某山区河道护岸滑坡案例，综合考察水文气象、地形地质、周边建构筑物及施工方案等关键因素，并利用有限元软件计算复核、失稳与稳定断面类比分析及管网漏水状况调查，深入剖析滑坡成因。结果表明，滑坡主要由管网漏水导致土体劣化、雨水入渗削弱坡体稳定性，以及施工管控不当引发。据此，提出“先控险、再治理、后预防”的三级处理方案，经工程运行及汛期检验，该方案合理有效，可为同类河道护岸工程的设计、施工及运维提供技术支撑。

Abstract:

To reveal the inducing factors of river revetment landslides in the mountainous areas and provide scientific and feasible prevention, control and treatment references, the research is conducted on the problem that such landslides are mostly caused by the combined effect of natural and human factors. Based on a case of river revetment landslide in a mountainous area in southern China, the key factors including hydrology, meteorology, topography, geology, surrounding structures and construction schemes are comprehensively examined. Through calculation and verification using finite element software, comparative analysis of unstable and stable sections, and investigation of pipeline network leakage, the causes of the landslide are analyzed in depth. The results show that the landslide is mainly induced by pipeline network leakage leading to soil degradation, rainwater infiltration weakening slope stability, and inadequate construction control. Accordingly, a three-level treatment scheme of “first risk control, then governance, and finally prevention” is proposed. After verified through engineering operation and flood season tests, the scheme is effective and reasonable, and can provide technical support for the design, construction, operation and maintenance of similar river revetment projects.