猴子岩水电站泄洪雾化区堆积体治理设计

Control design for deposit body in flood-discharge atomization zone of Houziyan Hydropower Station

角坝堆积体位于猴子岩水电站主要泄洪雾化影响区内。该堆积体结构松散,岩体风化卸荷强烈,边坡受泄洪雨雾冲刷,渗透及稳定问题突出。在量化分析边坡受泄洪雾化影响范围及程度的基础上,确定了堆积体加固治理初步方案。随后的施工开挖揭示,边坡地质条件较差,锚杆及锚筋束成孔困难。为加快施工进度,将原来的锚杆+锚筋束+混凝土贴坡治理方案调整为锚索+混凝土贴坡方案。新的加固方案降低了施工难度,在保证工程进度的同时增加了边坡稳定安全裕度,可为类似边坡治理工程提供参考。

Jiaoba deposit body, characterized as loose structure, strongly weathered and unloaded rock mass, is located in the flood-discharge atomization zone of Houziyan Hydropower Station, and the seepage and instability of its slope are prominent. The initial reinforcement solution for the deposit body is proposed after the influencing range and level of the flood-discharge at-omization is analyzed quantitatively. However in the construction, the excavation reveals that slope geological condition is poorer and it is difficult to conduct hole-drilling. In order to speed up the construction progress, the original treatment measures of an-chor cables ＋ anchor bars ＋ concrete-faced slope is adjusted to the solution of anchor cables ＋ concrete-faced slope. The new reinforcement solution reduces the construction difficulties, ensures the construction schedule, and also increases the safety margin of slope stability.