内容摘要，本设计分为设计说明书和计算说明书两部分。
设计说明书共有十章，分别是枢纽概况，设计资料，枢纽布置，主要建筑物的设计，细部构造及地基处理，副坝设计等。
本枢纽主要任务是防洪发电。其正常高水位为345米，发电死水位333米，装机容量2.7万千万。经过调洪演算得到其设计洪水位346.72米，校核洪水位349.88米，本枢纽主要建筑物由挡水建筑物、泄水建筑物、发电建筑物、放空建筑物组成。主要建筑物为二级，次要建筑物为三级。坝型选用混凝土实体重力坝。厂房坝段包括三个机组段和一个安装场段，厂房采用坝内埋管式。施工导流选用两期两段的导流方法，一期由束窄河床泄流，二期由导流底孔泄流。
其他具体设计详见设计说明书，另外除了设计说明书和计算说明书外，还有反映本次设计成果的五张图纸。
关键词：重力坝 溢流坝段 地基处理 方案选择 初步设计 枢纽布置Abstract
The design work is for the Ningxi water project, which has been carefully introduced. The work is divided into two parts: the designing and the calculating.
The work of designing includes ten chapters altogether .They are the general introduction of the project ,the basic material, layout of the project, desgning of the major constructure and etc.
Generating electricity and flood control is the main task of the pivot. Normal high water level is345,extreme water level of generating electricity is333,installed capacity 27000kw.Through adjust big to perform and can be regarded as design flood its location 346.72 meters, check the flood 349.88 metres of location. This pivot main building blockd water building,sluice building ,generate electricity building ,set the empty building free make up.The main building is two grade, and the secondary building is tertuart. The dam type is gravity dam ,entity of concrete. Factory building dam section includes three aircrew section and one install field section and the factory building adopts the type in the dam .Water diversion selects two section of water conserewancy diwersion methods for sue ,lets out and flows from one bunchof narrow riverbeds while being the first stage of, let out and shed by water conservancy diversion under port while being the second stage of design.
The details of the design instruction are in the manual of the desing and there five drawings to reflect the desing achievement still.
Key words gravity dam overflow section ground-handlingscheme option preliminary design project layout.
