粤北某隧道南出口道路边坡滑动分析与处理

Analysis of sliding mechanism and treatment of a slope at the south exit of a tunnel in the north of Guangdong

粤北岩溶地区是地质灾害频发地区,作者在野外调查的基础上,阐述了粤北某隧道出口处右线道路边坡概况,通过地表裂缝的走向及组合关系判定次级滑坡的存在,分析了影响该边坡的岩土因素、地层组合因素及地下水因素,说明该边坡失稳的内因是土层结构特征,而外部主控因素是地下水。对目前该边坡次级滑坡体的稳定性进行了预测,说明次级滑坡体产生"越顶"滑坡的必然性,提出了进一步详细勘察的技术要点及彻底的治理措施。

Geological disasters occur frequently in the Karst region investigations, the author expounds the overview of the right side of the in the northern part of Guangdong. After field road slope, which lies at a tunnel south exit in the north of Guangdong. The sub-landslide is identified by analyzing the trend and relationship of the cracks in the surface, the influencing factors are investigated, such as geotechnical, strata portfolio and groundwater. It presents that the internal cause of the destabilization is the soil structure and the main external cause is groundwater. Meanwhile, it predicts the stability of the sub landslide of the slope, and it is inevitable to produce ＂overtopping＂ landslides. Finally, further technical elements of detailed investigation and complete control measures are proposed.