紧水滩水电站及尾水管结构设计说明书.doc
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- 紧水滩 水电站 水管 结构设计 说明书
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1、摘 要 紧水滩电站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。该工程采用高水头大坝,挡水建筑物为混凝土重力坝,泄水建筑物为溢流坝,在洪水季节,河流最大泄流量为20000m3/s,此时用溢流堰泄流。设计洪水位为289.94m,校核洪水位为291.8m,正常蓄水位为284m,设计死水位为264m,坝顶高程293m,坝基开挖至高程192m,整个坝高99m,坝底高程194m。上游坝坡坡度0,下游坝坡坡度1:0.75,溢流坝堰顶高程274.3m。本枢纽河谷底宽90m左右,坝顶高程处坝轴线长285m,根据布置,溢流坝段布置在河床中间偏
2、右岸,厂房布置在左岸。因左岸比较平缓,可布置开关站,电厂办公管理用房设施。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,其直径为3m,转速为214.3r/min。发电机为SF45-28/653.9。安装水轮发电机组4台, 单机容量5万千瓦,总装机容量为200000kw。厂房宽为18m,长为74m, 水轮机安装高程205.675m,发电机层高程211.3m,装配场层高程211.3m(与进厂公路同高程)。各个枢纽建筑之间由公路相连,它连接了包括安装场、尾水平台、大坝和闸门启闭室等设施。另外,本设计还对机墩进行了布置和专门的配筋设计。关键词:水利枢纽;挡水建筑物;泄水建筑物;稳定;应
3、力;水轮机;发电机;选型;厂房;机墩。ABSTRACTJin-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 c
4、ontrol and etc.This engineering adopts high-lift dam, which use concrete gravity dam to prevent the water and overflowing dam to sluicing. When it occurs flood, overflowing weir is used to spill over the flood, whose biggest rate of flow reaches 20000ms/s. According to the design of dam, the details
5、 are as following: designed flood level is 289.94m; revised flood level is 291.8m; the normal level of storing water is 284m; the designed lowest level of water is 264m; the top height of dam is total 293m; the foundation of dam arrives to 192m height; the total height of dam is 99m; The upstream da
6、m slope is 0 ,the downstream dam slop is 1:0.75 the width of of bottom of river vale to this hinge is about 90m; the length of axis on top of dam is 285m; According to disposal, the overflowing dam lies near the right shore of riverbed, whereas factory lies on left shore, because the left shore is m
7、uch flater which can lay the switch station and facilities of office. This engineering uses such disposal that the hydroelectric station is behind the dam. Via calculation, we choose the mixed hydraulic turbine, whose diameter is 3m and r.p.m is 214.3r/min. Generator is SF45-28/653.9 hydraulic turbi
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