紧水滩水电站坝后式厂房方案论证设计说明书.doc
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1、摘要紧水滩水电站位于龙泉溪上,是瓯江上游干流梯级开发的第一级水电站,工程以发电为主,兼顾航运、放木及防洪等综合利用要求。该工程挡水建筑物为混凝土重力坝,泄水建筑物为溢流坝,设计洪水位为289.94m,相应的下泄流量为11000m3/s;校核洪水位为291.80m,相应的下泄流量为14100m3/s,正常蓄水位为284m,设计低水位为264m.非溢流坝坝顶高程293.88m。坝基开挖至高程200m。最大坝高93.88m。上游坝坡坡度1:0.15,下游坝坡坡度1:0.77,溢流坝堰顶高程272.37m,水电站进水口中心线高程254.2m本枢纽河谷底宽80m左右,坝顶高程处坝轴线长278m,泄水建筑
2、物进口净宽96m。根据布置,溢流坝段布置在河床中间,厂房布置在溢流坝段,为厂房顶溢流形式。因右岸比较平缓,可布置开关站.该工程采用坝后式水电站布置方式,通过计算选用了混流式水轮机型,转轮直径为3.0m,转速为214.3r/min。安装水轮发电机组4台, 单机容量4.6万千瓦,总装机容量为18.4万kW。主厂房宽为19m,长为75.5m.副厂房是为保证水电站正常运行需要,设置在主厂房上游侧。主要布置各种机电辅助设备、房间、生产间和必要生活设施房间。进场公路布置在左岸。本设计还包括坝内埋管的结构设计。关键词 坝后式水电站 混凝土重力坝 水轮机 发电机 进水口 厂房 坝内埋管 ABSTRACTJin
3、-shui-tan hydroelectric station is located on Long-quan stream which is the first hydroelectric station of the upper mainstream of Ou river. The primary effect of the whole engineering is generating electricity that also meets the demand of shipping, drift wood, flood control and etc.This engineerin
4、g use concrete gravity dam to prevent the water and overflowing dam to sluicing. The design water level is 289.94m ,its corresponding flow amount is 11000m3/s .The check level is 291.80m ,its corresponding flow is 14100m3/s.The regular water retaining level is 284m .The crest elevation of the non-ov
5、er-fall dam is 293.88m , the foundation of dam arrives to 192m height,The max height of the dam is 93.88m ,The upstream dam slope is 1:0.15 ,the downstream dam slop is 1:0.77 ,the crest elevation is 272.37m . The elevation of the water intake of the plant is 254.2m.The width of bottom of the river v
6、ale to this hinge is about 80m; the length of axis on top of dam is 278m; According to disposal, the overflowing lies in the middle of riverbed, whereas factory lies in the middle of overflowing dam .Because the left shore is much flater which can lay the switch station. This engineering uses such d
7、isposal that the hydroelectric station is behind the dam. We choose the mixed hydraulic turbine, whose diameter is 3.0m and r.p.m is 214.3r/min. One of Generator has 46000 kw electricity. It is ensured to generate 184000 kw electricity. The width of the main power house is 19m,the length is 75.5m. A
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