水口水电站枢纽布置及有关技术问题

Lay-out of the Shuikou project and the major technical measures taken

水口水电站采用左岸坝后式厂房的枢纽总布置方案,主要水工建筑物由混凝土实体重力坝、坝后厂房、一线2×500t三级船闸、一线2×500t垂直升船机和开关站组成。泄洪选用连续式鼻坎挑流消能;船闸输水系统采用反向弧门和输水廊道突扩措施;大直径钢管设置压缩垫层;部分混凝土工程采用外掺氧化镁和硅粉混凝土技术以及碾压混凝土施工工艺;土石围堰采用土工膜防渗。电站采用世界上最大的轴流式水轮机和国内首创的四缸接力式液压启闭机。实践证明,枢纽布置以及所采取的技术措施效果良好。

The powerhouse of the Shuikou project is placed at the toe of the dam on the left side. The major structures are mainly a solid gravity dam, a powerhouse, a one-way 500-ton three-flight ship lock, a 2×500ton ship lift and a switch station. In project construction a lot of effective technical measures have been taken, such as the continuous flip buckets for energy dissipation during flood discharging, the inverted radial gates and the water delivery galleries with suden enlargement in the conduit system, the compressive bedding of large diameter penstocks, in the concrete of part of the structures magnesium oxide and silica powder being added, RCC, geomenbrane for antiscepage in the earth-rockfill cofferdam. The project improvided with the world largest axial-flow turbines and the four-cylinder booster hydraulic hoist, which is the first of its kind in China.