乌溪江水电站枢纽布置及岔管设计说明书

目录

目录 (1)

摘要 (1)

ABSTRACT (2)

第一章设计基本资料 (3)

第二章水轮机 (9)

第三章发电机 (19)

第四章混凝土重力坝 (20)

第五章混凝土溢流坝 (27)

第六章引水建筑物 (32)

第七章主厂房尺寸及布置 (45)

第八章岔管 (49)

摘要

乌溪江水电站座落于浙江省乌溪江，湖南镇，属于梯级开发电站，根据地形要求，其开发方式为有压引水式。坝区地质条件较好，主要建筑物（混凝土重力坝），泄水建筑物（混凝土溢流坝），引水建筑物（有压引水遂洞、调压室和压力钢管），河岸式地面厂房。

水库设计洪水位237.5m，相应的下泄流量5400m3/s；校核洪水位239.0m，相应的下泄流量9700m3/s；设计蓄水位231.0m，设计低水位191.2m。

本设计确定坝址位于山前峦附近，非溢流坝坝顶高程239.5m。坝底高程115.0m。最大坝高124.5m。上游坝坡坡度1：，下游坝坡坡度1：，溢流坝堰顶高程221.81m。

引水遂洞进口位于坝址上游凹口处，遂洞全长1138.8m。洞径8m，调压室位于厂房上游228.1m左右处，高程254.4m左右的山峦上，型式为差动式。

厂房位于下游荻青位置。设计水头94.6m，装机容量4×=17万kW，主厂房净宽18.98m，净长68.6m。水轮机安装高程115.8m，发电机层高程126.455m，安装场层高程129.455m。厂房附近布置开关站，主变等。受地形限制，尾水平台兼作公路用，坝址与厂区通过盘山公路连接，形成枢纽体系。

另外，本设计还对岔管体型设计及进行了结构计算。

Abstract

The Wuxijiang hydropower station is located in HuNan Town in ZheJiang province ,which belongs to a chain of exploitation .

According to the demand of topographic form ,I choose diversion hydropower station . The geology condition is good .The main construction conclude the water retaining structure (the concrete non –over-fall dam) ,the release works (the concrete over–fall dam) ,the diversion structure (pressure seepage tunnel ,the surge-chamber ) ,and the surface power station .

The design water level is 237.5m ,its corresponding flow amount is 5400m3/s .The check level is 239.0m ,its corresponding flow is 9700m3/s .The regular water retaining level is 231.0m .

The dam site is near the former saddle .The crest elevation of the non-over-fall dam is 239.5m ,and the base elevation is 115.0m ,The max height of the dam is 124.5 m ,The upstream dam slope is 1: ,the downstream dam slop is 1: ,the spillway crest elevation is 221.81m .

The inducer of the seepage tunnel is located at the recess place ,The length of tunnel is 1138.8 m ,the diametric of which is 8m .The surge-chamber is located at the mountain , which is about 221.81m from the work shop building and is type is differential motion.

The workshop building is located at downstream ,the design level of the turbine is 94.6 m , the equipped capacitor is kW ,the clean width is 18.98 m , its whole length is 68.6 m . The fix level of the turbine is 115.8 m , and the height of dynamo is 126.455m . Near the workshop building , there are switch station and the main transformer and so on .

This design is concluded branch pipe.

关键词：水利枢纽；挡水建筑物；泄水建筑物；稳定；水轮机；引水隧洞；调压室；厂房；岔管。

第一章设计基本资料

流域概况和地理位置

乌溪江属衢江支流，发源于闽、浙、赣三省交界的仙霞岭，于衢县樟树潭附近流入衢江，全长170公里，流域面积2623平方公里。

流域内除黄坛口以下属衢江平原外，其余均属山区、森林覆盖面积小，土层薄，地下渗流小，沿江两岸岩石露头，洪水集流迅速，从河源至黄坛口段，河床比降为1/1000，水能蕴藏量丰富。

流域内已建成二级水电站，第一级为湖南镇水电站，坝址位于衢县境内乌溪江区山前峦处，坝址以上流域面积为2151平方公里。第二级为黄坛口水电站，坝址位于衢县黄坛口公社。坝址以上流域面积为2328平方公里。

1.1.1 水文条件

湖南镇坝址断面处多年平均径流量为83.0m3/s。实测最大洪峰流量为5440 m3/s，（1954年），千年一遇洪水总量（4日）为亿立方米，洪峰流量为11300m3/s。万年一遇洪水（4日）总量为16.2亿立方米，洪峰流量为16600m3/s。保坝洪水