安徽省枞阳县高峰村同咀崩塌稳定性分析与评价

Analysis and Evaluation of the Stability of Tongzui Collapse in Gaofeng Village in Zongyang County of Anhui Province

通过实地踏勘并辅以钻探等技术手段,对枞阳县高峰村同咀崩塌的边坡地形地貌、地层岩性、地质构造、水文地质条件、工程地质条件以及人类工程活动等条件进行调查,并在进行变形位移监测的基础上,对研究区崩塌灾害的发育特征、影响因素以及形成机制进行了分析,并采用极限平衡法对崩塌灾害的稳定性进行了评价。研究结果表明:2处崩塌灾害规模等级均属小型,破坏方式均为滑移式;影响因素主要包括人工切坡,钾长花岗岩强烈风化,构造裂隙、风化裂隙和卸荷裂隙发育和强降雨等; 2处崩塌在天然工况下处于基本稳定状态,在暴雨工况下处于欠稳定状态,需采取相关治理措施。依据分析评价结果对崩塌灾害治理提出了防治方案建议。

On the basis of field reconnaissance and drilling,the slope topography,stratigraphic lithology,geological structure,hydrogeological conditions,engineering geological conditions and human engineering activities of Tongzui collapse in Gaofeng village of Zongyang county have been analyzed.Based on the deformation displacement monitoring,the development characteristics,influencing factors and formation mechanism of the collapse disasters in the study area have been analyzed,and the stability of slope has been calculated by limit equilibrium method.It is showed that the scales of the two collapse disasters are small and the failure modes are all slipping.The influencing factors mainly include artificial slope cutting,strong weathering of K-feldspar granite,tectonic fracture,weathering fissure and unloading fissure development and heavy rainfall.The two collapse disasters are in a basically stable state under natural conditions,and they are in an unstable state under heavy rain conditions,and relevant treatment measures need to be taken.Based on the results of the analysis and evaluation,recommendations for prevention and treatment of the two collapse disasters have been put forward.