深汕公路K101滑坡稳定性评价及处治措施

深汕高速公路K101滑坡为开挖引起的老滑坡复活,发生多次滑动。根据其地貌特征、地质条件、水文特征和坡体结构特征,并结合现场勘察结果,对坡体变形特征进行分析;同时采用试验、经验和反算相结合的手段,综合确定主要滑动带岩土物理力学参数,分析了滑坡未处理前的稳定状态,结果与实际较为吻合;并分析抗滑工程设计的稳定性。根据评价结果,鉴于已有抗滑工程的局限性,采用"竖向集水渗管+渗井+水平排水隧洞"三维立体排水措施进行滑坡处治,工后监测结果显示,该措施排水效果显著,有效地控制了地下水位上升,边坡变形趋于稳定。

Treatment Measures Based on Evaluation on Landslide Stability of Shenzhen-Shantou Highway K101 Section

The landslide in Shenzhen-Shantou Highway K101 Section is the old landslide reactivation due to excavation.According togeomorphic features, geological conditions, hydrological and structural features of slope, combined with site investigation results, the reformation characteristics of slope are analyzed in this paper.At the same time, different means, including testing, experience and inverse computation, are used to determine the physical and mechanical parameters of rock-soil in the main sliding zone, and analyze the stability of landslide before being disposed.The results are consistent with the actual state.Then the stability of anti-sliding measures is analyzed.At last, as per the evaluation results, considering the limitations of the existing anti-sliding engineering, three-dimensional drainage measures "vertical water drainage pipe+seepagewell+horizontaldrainage tunnel" are taken to dispose the landslide and three-dimensional deep interception.The monitoring results after treatment thereof show that the drainage effect is better, which effectively controlled the underground water level and keep stable landslide deformation.