库水升降对猫溪沟水库右岸坡涉水堆渣体稳定性分析研究

STUDY ON THE STABILITY ANALYSIS OF RESERVOIR WATER RISE AND FALL ON THE RIGHT BANK SLOPE OF MAOXIGOU RESERVOIR FOR WATER RELATED SLAG STORAGE

研究旨在评估猫溪沟水库库水升降对右岸坡涉水堆渣体稳定性的影响,并探索有效的防治措施。通过现场调查和地质分析,针对右岸坡7个堆渣体中DJ2、DJ3和DJ5这3个涉水堆渣体建立了详细的计算模型。利用Geo Studio软件中的Slope W模块,采用不同库水位的不同参数,分别模拟了库水上升和下降两种工况下堆渣体的安全系数变化,以预测其稳定性。研究结果显示,库水位变化对堆渣体的稳定性影响显著,尤其是在快速下降阶段,显著降低了堆渣体的稳定性。为此提出了前缘支挡、分级放坡和削方减载的综合防治方案,并通过实际蓄水检验,证实了上述措施的有效性。研究成果对于类似水库工程中涉水堆渣体稳定性分析和防治措施的选择具有一定的参考价值,对于保障猫溪沟水库安全运行和减少地质灾害风险具有指导意义。

The study aims to evaluate the impact of water level rise and fall in the Maoxigou Reservoir on the stability of the right bank slope wading debris pile,and explore effective prevention and control measures.Through on-site investigation and geological analysis,detailed calculation models were established for the DJ2,DJ3,and DJ5 water related slag bodies in the 7 slag bodies on the right bank slope.Using the SlopeW module in Geo Studio software,different parameters of different reservoir water levels were used to simulate the safety factor changes of the slag body under two working conditions of reservoir water rise and fall,in order to predict its stability.The research results show that changes in reservoir water level have a significant impact on the stability of the slag body,especially during the rapid decline stage,which significantly reduces the stability of the slag body.A comprehensive prevention and control plan was proposed for this,which includes leading edge support,graded slope grading,and load reduction by cutting.The effectiveness of the above measures was confirmed through actual water storage tests.The research results have certain reference value for the stability analysis of water related debris bodies and the selection of prevention and control measures in similar reservoir projects,and have guiding significance for ensuring the safe operation of Maoxigou Reservoir and reducing geological disaster risks.