雅砻江某水电站旦波堆积体成因机制分析

Analysis of the Genetic Mechanism of the Danbo Accumulation of a Hydropower Station on Yalong River

西南地区水电工程中堆积体边坡的稳定性问题成为制约工程建设的重要因素,分析堆积体边坡的成因机制,可为工程建设、堆积体边坡的处理措施提供重要依据。通过对旦波堆积体边坡成因机制宏观定性分析及定量分析评价,得出堆积体边坡整体稳定性较好的结论。基于内外动力耦合作用的思想,提出了堆积体边坡的成因机制:由于受断裂构造破碎(内动力)、风化作用(外动力)等,上部岩体发生崩塌、倾倒破坏,破坏后的产物向坡体下部运动、堆积,由于长期持续的堆积,堆积体下部发生固结压密变形。

The stability of accumulation slope in hydropower projects in Southwest China has become an important factor restricting the construction of the projects. The analysis of the genetic mechanism of the accumulation slope can provide an important basis for the treatment of accumulation slope and the construction of the project. Through the macro qualitative analysis and quantitative analysis of the genetic mechanism of the Danbo accumulation slope, it is concluded that the overall stability of the slope is favorable. Based on the idea of internal and external dynamic coupling, the genetic mechanism of the accumulation slope is proposed: due to fracture (internal dynamics) and weathering (external dynamics), the upper rock mass collapses and slumps, and the materials from the collapses moves and accumulates towards the lower part of the slope, and due to long-term continuous accumulation, the lower part of the accumulation is consolidated and compacted.