洼地堵洞成库施工实践

Construction practice of blocking holes into a reservoir

本文结合广西某洼地堵洞成库工程实例,介绍釆用级配料灌浆、帷幕灌浆等工程技术,修筑地下堵体和防渗帷幕对流经该洼地的地下河管道实施堵截,较成功地截住地下河水向下游排泄量,减少洼地积水通过天窗、落水洞向下游的渗漏量,从而增加天窗向洼地的溢洪量,建成了库容约250万m3的溶洼水库,基本解决了周边一带万余人生产生活用水困难的问题,极大缓解了该溶洼水库周边、岩溶大石山区干旱农田灌溉问题;同时为今后开发利用地下河水资源提供了全新的思路和经验。

In combination with the case study of blocking holes into a reservoir in Guangxi,this paper introduces the engineering technology such as gradating material grouting and curtain grouting to construct underground blockages and anti-seepage curtains to block underground river pipelines flowing through the depression.The amount of underground river water is discharged downstream,reducing the leakage of depression water to the downstream through skylights and sinkholes,thereby increasing the water flow from the skylight to the depression.A karst reservoir with a storage capacity of about 2.5 million m3 has been built,which basically solved the problem that more than 10,000 people in the surrounding areas have difficulty in using water for production and living,and greatly eased the irrigation of dry farmland around the karst reservoir and karst mountain area.This paper also provides new ideas and experiences for the future development and utilization of underground river water resources.