株溪口水电站基础岩溶处理技术与实践

Technology and Practice of Karst Foundation Treatment of Zhuxikou Hydropower Station

株溪口水电站工程基础岩溶发育丰富,存在大规模高流速、管道型涌水通道。对这种复杂地质基础的处理,应先查明岩溶发育规模及分布范围,采取引管控制出口流量,结合在合适位置进行井点抽排水,然后覆盖基础混凝土,将涌水通道封闭,采取先堵后灌的方法,有效降低水流流速,再采用水泥灌浆进行堵漏,能取得有效而且经济的处理效果。该基础岩溶处理技术,可供其他工程处理类似问题时参考。

In the Zhuxikou Hydropower Station, there is rich in the development of karst and a lot of seepage passages with large scale and high speed of water flow. In order to treat such complex geological foundation, we should firstly find out the development scale and distribution range of karst and adopt the diversion pipe to control the outlet discharge. Then the well pumping water was adopted in proper locations and foundation concrete was poured to block the water seepage passage. The first blockage and then grouting method can effectively reduce the water flow speed. The cement grouting was used to block seepage, which could achieve effective and economical treatment results. Such karst foundation treatment technology could be used for reference for other similar projects.