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通过现场调查分析,溪洛渡水电工程杨家沟渣场水土流失严重,弃土顶端张拉裂缝扩展。文章对其侵蚀情况,变形特征进行分析,发现水力侵蚀、渗流对杨家沟渣场稳定性起决定性作用。根据瑞典条分法,对渣场洪水条件下渗流进行分析,比较了渗流和非渗流稳定性安全系数。研究表明,渗流显著削弱了坡体稳定性安全系数。因而减轻或消除水力侵蚀、渗流是确保渣场稳定的必要措施。
Through on-site investigation and analysis, the soil and water loss of the Yangjiagou slag yard of the Xiluodu Hydropower Project is serious, and the top of the spoil expands. Based on the analysis of erosion and deformation characteristics, it is found that hydraulic erosion and seepage play a decisive role in the stability of Yangjiagou slag yard. According to the Swedish section method, the seepage flow under the condition of flood in the slag yard is analyzed, and the safety coefficient of seepage and non-seepage stability is compared. Studies have shown that seepage flow significantly weakens the safety factor of slope stability. Thus reducing or eliminating hydraulic erosion, seepage is to ensure the stability of the slag yard necessary measures.