水电站引水隧洞施工支洞堵头封堵防渗漏施工技术应用分析

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中图分类号：TV554 文献标识码：A文章编号：1672-3791（2026）01-0155-03

Analysis of the Application of Anti-Seepage Construction Technology of Plugging Branch Tunnel Plugs in the Construction of the Diversion Tunnel of a Hydropower Station

LUO Kejun

Liyuan Power Generation Branch，Lijiang，Yunnan Huadian Jinsha River Midstream HydropowerDevelopment Co.，Ltd.，Yunnan Province，6741oo China

Abstract： A sealing processbased on expansive concrete and composite grouting is proposed to addressthe issue of leakage prevention in the construction of diversion tunnels for hydropower stations.Combined with the leakage repair technology during the operation period，a fulife cycle prevention and control system is constructed.Byoptimizing the material and structural design of the plug，and adopting technologies such as layered pouring，highpressure grouting and intellgent monitoring，the leakage problems caused by material deterioration，construction defects and changes in externalloads canbe solved.Enginering cases showthat after the repair，the seepageflowrate has decreased by 90% ，and the permeability rate meets the specification requirements，verifying the applicability of the technical system.The research results provide replicable technical paths for similar projects and promote the progress of anti-seepage technology in hydropower engineering.

Keywords： Hydropower station; Water diversion tunnel; Plug plugging; Anti-seepage

水电站引水隧洞施工支洞堵头作为临时结构封堵的关键环节，其防渗性能与长期稳定性直接关系到隧洞运行安全和电站经济效益[1]。（剩余4049字）