两河口水电站初期导流洞下闸封堵施工技术  

Construction Technology for Blocking and Closing Gate of the Initial Diversion Tunnel in Lianghekou Hydropower Station

作　　者：晏明 王红军 YAN Ming;WANG Hongjun(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2025年第4期114-119,共6页Yunnan Water Power

摘　　要：两河口水电站1号、2号导流洞及供水洞进口闸室呈地下埋藏式“一”字型布置,封堵门采用前置式水封且设计经济但该工程水力条件严苛、作业环境不利因素多,风险大,且受疫情影响,在枯水期错失下闸前对门槽进行水下探摸、检查、清理及修复时机形成不利条件。针对这些不利条件,下闸实施面临巨大挑战与安全风险,需重点探讨门槽填框拆除、试探门槽与闸门安装的选择时序,下闸方案比选和下闸时机选择,经业界知名专家研讨优化调整明确下闸时间、顺序及合适的下闸方式。确保尾水改建段施工工期,为二期蓄水发电目标的实现创造有利条件,通过导流洞下闸封堵施工技术在工程中的成功实施与应用,可为国内外类似工程提供有益借鉴。The inlet chambers of the No.1 and No.2 diversion tunnels and water supply tunnels of Lianghekou Hydropower Station are arranged in an underground buried straight line layout.The sealing door adopts a front type water seal and is designed economically.However,the hydraulic conditions of this project are strict,and there are many unfavorable factors in the operating environment,which poses a high risk.Moreover,due to the impact of the epidemic,the opportunity for underwater exploration,inspection,cleaning,and repair of the gate slot before closing the gate was lost during the dry season,resulting in unfavorable conditions.In response to these unfavorable conditions,the implementation of gate closure faces enormous challenges and safety risks.It is necessary to focus on exploring the timing of gate slot filling and removal,testing the selection of gate slot and gate installation,comparing and selecting gate closure schemes,and determining the timing of gate closure.Through discussions and optimization by well-known experts in the industry,the gate closure time,sequence,and appropriate gate closure method should be clarified.The final plan ensures the construction period of the tailwater reconstruction section and creates favorable conditions for achieving the goal of second phase water storage and power generation.The successful implementation and application of the diversion tunnel gate sealing construction technology in engineering can provide useful reference for similar projects at home and abroad.

关 键 词：初期导流洞 下闸 封堵 施工技术 方案比选 

分 类 号：TV551[水利工程—水利水电工程]