毕设基本摘要
摘 要
A江水利枢纽同时兼有防洪，发电，灌溉，渔业等综合作用，水库正常蓄水位184.8m，设计洪水位189.78m，校核洪水位192.16m，汛前限制水位182m，死水位164m，尾水位103.5m。水库死库容9.3亿m3，总库容12.5亿m3。
A江水利枢纽工程等别为一等，工程规模为大（1）型工程，主要建筑物级别为1级，次要建筑物级别为3级，临时性建筑物级别为4级。
A江水利枢纽的主要组成建筑物有挡水建筑物，主副厂房，泄水建筑物，过木筏道等。
挡水建筑物是一变圆心变外半径的双曲拱坝，最大坝高101.81m，坝底厚26.06m，坝顶宽8.44m。
泄水建筑物由两个浅孔和两个中孔组成：浅孔位于两岸，孔口宽8m，高8.5m，进口底高程为164m，出口底高程为154m；中孔位于水电站进水口两侧，孔口宽7.0m，高7.0m，进口底高程为134m，出口底高程为129m。在坝身泄水孔的上游侧游布置平板形检修闸门，下游侧布置弧形的工作闸门，在每一个工作闸门的上方设有相应的启闭机房。泄槽支撑结构采用框架式结构。坎顶高程为119,浅孔反弧半径为40m,中孔反弧半径为50m。泄槽直线段的坡度与孔身底部坡度一致,挑射角均为θ=20o,导墙厚度为1.0m, 浅孔导墙高度为7.5m,中孔导墙高度为9m。
本设计采用坝后式厂房，4台5万kw的发电机组，主厂房长81m，宽18m，副厂房长66m，宽10m，安装场长21m，宽18m。压力管道的直径为4.5 m，进水口底高程为152.17m。发电机层高程为114.8m，尾水管底高程为90.8m，厂房进水口底高程为152.17m。
为防止坝基渗漏，在坝基靠近上游侧进行帷幕灌浆，并且为了减少坝基的扬压力，在灌浆帷幕之后设置排水孔。偏角为6°
为了防止混凝土产生裂缝，拱坝坝体设置横缝，横缝面上需设置键槽，以咬合加固，增强坝体的抗剪能力。当底宽在40～50m以上的拱坝，才考虑设置纵横缝，而本设计中，拱坝坝底宽为26.06m，小于40m，故可不设置纵缝。
Abstract
A jiang hydrocomplex play parts in flood control,water power,irrigation,water conservancy related fisheries,and so on.The reservoir normal water level is 184.8m,design flood level is 189.78m,maximum flood level is 192.16m,flood control level is 182m,dead water level is 164m,and tail water level of hydropower station is 103.5m.The dead reservoir capacity is 930,000,000m3,and the total reservoir capacity is 1,250,000,000 m3.
The hydraulic engineering grade is Grade I.
The hydroproject is consist of water retaining structure,power house,auxiliary room,sluice structure,raft sluice,and so on.
The water retaining structure is a double curvature arch dam.Maximum height of the dam is 101.81m,the thickness of the bottom of the dam is 26.06m,and the width of the top of the dam is 8.44m.
The release structure is comprised of 2 mid-level outlet and 2 short-level outlet. the width of the short-level outlet is 8.0m,and the height is 8.5m; The width and height of the mid-level outlet is 7.0m.The upstream and the downstream side of every outlet are a bulkhead gate and a operating gate which is a radial gate.There is a room where a gate hoist is put above every service gate.The intake of the mid-level outlet is at an elevation of 134m ,and the intake of the short-level outlet is at an elevation of 164m.
The type of the power house is at damtoe.The dimensions of the power house and the auxiliary room are 81m×18m and 66m×10m.The generator floor is at an elevation of 114.8 metres,and the bottom of the draft tube is at an elevation of 90.8 metres,and the intake of hydropower station is at an elevation of 152.17 metres.
In case of leakage of the dam foundation,there is grouting curtain at the base of the dam,behind which there are drainage holes which decrease the uplift pressure of the dam foundation.
In radial directions there are transverse joints in which there are keys,and because the thickness of the bottom of the dam is smaller than 40～50 metres,there is no longitudinal joint.
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