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官厅水库输水泄洪洞是官厅水库枢纽工程主要建筑物之一,是官厅水库唯一的底部泄水设施,担负着水库的输水、泄洪、排沙和放空四大主要任务。该输水泄洪洞位于拦河坝右岸,由进水塔、隧洞和静水池3部分组成,全长635.50m。由于官厅水库输水泄洪洞的检修门是按静水启闭设计,未设事故闸门,输水泄洪洞不具备在事故情况下的应急措施和检修条件,与现行规范和使用要求不符。这次对官厅水库输水泄洪洞的改建工作,主要是为输水泄洪洞增设事故备用条件,使之满足现行的设计规范和使用要求,提高输水泄洪洞的安全性;同时考虑到输水泄洪洞长期运行以来建筑物结构及机电设备出现的老化、损坏严重等问题,对输水泄洪洞金属结构及机电设备一并彻底改造、更新。
Guanting Reservoir Drainage Tunnel is one of the main buildings in Guanting Reservoir Project and the only bottom drainage facility in Guanting Reservoir. It is responsible for the four main tasks of water delivery, flood discharge, sand drainage and venting. The water conveyance flood discharge hole is located on the right bank of the dam and consists of three parts: the intake tower, the tunnel and the static pool, with a total length of 635.50m. As Guanting Reservoir drainage spillway access door is designed by hydrostatic opening and closing, there is no accident gate, water spillway tunnel does not have the emergency measures and maintenance conditions in the accident, and the current norms and requirements do not match. The reconstruction work of the Guanting Reservoir’s spillway tunnel is mainly to add accident reserve conditions for the spillway tunnels so as to meet the current design codes and requirements and improve the safety of the spillway tunnels. At the same time, Since the long-term operation of spillway tunnels, the structure of buildings and the serious aging and serious damage of mechanical and electrical equipment have resulted in the complete renovation and renewal of the metal structures and mechanical and electrical equipment of flood diversion tunnels.