岩滩水电站扩建工程地下厂房渗水处理

岩滩水电站扩建工程地下厂房充分利用各种施工支洞、排水洞、排水沟及集水井相结合的方式,形成了一套完整的、闭式的排水系统。但地下厂房一般由于地质情况复杂、设计缺陷及施工质量控制不严等客观因素,而且厂区各洞室距水库较近,且围岩具有一定透水性。在下闸蓄水后无混凝土衬砌区域均存在不同程度的渗水或滴水现象。主厂房顶拱等部位出现滴、渗清水等现象。有混凝土衬砌区域混凝土在浇筑完成后难免存在一些缺陷。混凝土的裂缝几乎是不可避免的,必然会产生渗水现象。文章主要针对岩滩水电站扩建工程地下厂房出现的渗、滴水处理进行探讨。

Underground Powerhouse Seepage Treatment for Extension Project of Yantan Hydropower Station

The underground powerhouse of the Extension Project of Yantan Hydropower Station constructs a complet- ed and closed drainage system by making full use of all kinds of construction adits, drainage holes, drains and collect- ing wells. However, remain water seepage or drippage of different levels are found at the powerhouse after impound- ment, like, roof arch or concrete cracks etc. due to some objective factors including the complicated geological condi- tions, the design defects and the poor construction quality control measures as well as the permeability of surrounding rock of the powerhouse. The paper discusses the treatments on the water seepage or drippage found at the under- ground powerhouse of the Extension Project of Yantan Hydropower Station.