毕业设计（论文）说明书-碾压砼重力坝设计

1、水利水电工程专业毕业设计摘 要全套图纸加扣 3346389411或3012250582一个坝址的坝型选择，主要取决于地形、地质、水文和气候条件。本次设计的基本资料取于我国西南部地区的已建工程。经过对几种可建造坝型的经济比较估算，我们选择建造高碾压混凝土重力坝。它比实体重力坝所用混凝土方量少，总体造价低。碾压混凝土重力坝通常设置坝顶溢洪道，溢洪道为河川水利枢纽中必备泄水建筑物，用以排泄水库不能容纳的多余洪水量，必须设计成能泄放最大的流量，而同时能保持水库的水位在预定的水位以下。入库设计洪水的选择和确定，必须在充分研究流域水文因素的基础上进行，然后才能确定溢洪道尺寸。对于过坝水流的调泄，需要有合理审慎的设计，以避免生命财产的损失。我们是通过调洪演算来确定起调流量和下泄流量从而来设计溢洪道。接着在满足上下游稳定和应力的条件下，根据大坝基本剖面最小原则从而确定该碾压混凝土大坝的剖面和轮廓尺寸，也包括坝身的一些细部构造以及对地基的处理等等。在确定完上下游坡度以后，用稳定计算和材料力学法分别从正常蓄水，设计水位，校核水位以及正常加地震四个工况下来验证和校核设计剖面的可行性。同样溢流坝段的分析和非溢

2、流坝段也是一样的。在设计完坝体的基本剖面后，要通过材料力学的方法对坝体内的应力进行计算与分析，在保证上下游四个截面上的应力在正常蓄水和设计工况下都不出现拉应力，在地震和校核情况下的拉应力满足规范的要求。同时在设计第二主要建筑物时，设置压力钢管为水轮机供水。采用坝内埋管形式，钢管用箍筋和加劲环加固，设置伸缩节防止钢管由于温度变化而拉长或收缩使应力增大。并且也对压力钢管进行了细部构造和配筋计算。碾压混凝土大坝通常分期施工，而且对施工时时间的要求非常高，因为它的整个坝体有四部分混凝土，各种建坝材料的凝结时间和材料与材料之间的结合时间都要求比较高，所以分期导流是大坝建造的关键一步，要尽量的减少受到水文、地形、地质和施工计划的影响。大坝安全也是大坝设计中最重要的控制因素，坝愈高愈重要。由于水库蓄水量很大，更需要有谨慎的设计，以防止因失事而招致重大的生命财产损失。小心处理诸多影响运行性能的因素，可以确保坝的安全、经济和效用。通过本次设计我们掌握了碾压混凝土重力坝的设计方法，而且知道了关于碾压混凝土重力坝的一些重要的特点和设计时应该注意的地方，完成了专业知识从理论学习到实际运用的过渡，体会了身为一个

3、水利工程设计者所需要具备的品质和担负的责任，这对我们以后的工作或是学习都是一次提前操练。关键词：碾压混凝土重力坝；RCC；材料力学法Abstract One of the dam site selection, mainly depends on the topography, geology, hydrology and climatic conditions. The design of the basic information from the southwestern region of China has building works. After the construction of several dams to compare estimates of economy, we choose the construction of high RCC gravity dam. Entities than with concrete gravity dam by the side of less, the overall cost low. Roller compacte

4、d concrete gravity dam is usually set up the top of the dam spillway, the spillway for river water discharge structure essential hub for the excretion of excess reservoir can not accommodate the flood volume, must be designed to discharge the largest volume, while at the same time to maintain the reservoir the water level below the target level. Design of flood storage options and determined to be in full hydrological study conducted on the basis of factors, and then to determine the size of the

5、 spillway. For the transfer of water过坝China, the need for the design of reasonable care to avoid the loss of lives and property. We are through the flood transfer from calculus to determine the discharge flow of traffic and thus to design the spillway. Then in the upstream and downstream to meet the stability and stress conditions, the smallest profile in accordance with the basic principles of the dam in order to determine the profile of roller compacted concrete dam of the size and contour, bu

6、t also some details of dam body and foundation structures to deal with and so on. End in determining the upper and lower slope, the use of the stability of the mechanical method of calculation and normal water from the design water level, checking water level and the normal increase in the earthquake four conditions designed to verify and check the feasibility of profiles. Spillway section of the same analysis and non-overflow dam of the same paragraph. End in the design of the basic profile of

7、the dam, the mechanics of materials by the method of stress on the body to carry out calculation and analysis, to ensure that the four upper and lower section of the stress in the normal storage conditions and design of tensile stress did not appear , in the case of earthquake and checking the tensile stress to meet the specification requirements. At the same time, the main buildings in the design of the second, the set pressure of the water supply pipe for the turbine. Pipe used in the form of

8、dam, steel ring with strong reinforcement stirrups processing, set up to prevent the pipe joints and lengthen as a result of temperature change so that the stress increases or contraction. And also the pressure of a steel reinforced structure and calculated in detail. Roller compacted concrete dam construction phases are usually, but also the requirements of the construction time is very high, because of its four parts of the body of concrete, a variety of materials to build the setting time and

9、 materials and materials combined with the time between the request relatively high, so the phased diversion is a key step in the construction of the dam, to as much as possible to reduce the vulnerability of hydrology, topography, geology and construction programs. Design of dam safety is also a dam to control the most important factor, the more important the higher the dam. Reservoir storage capacity due to a large, but also the need for careful design in order to prevent a major accident resulting in loss of lives and property. Careful with a lot of factors that affect performance, you can ensure that the dams security, economic and effectiveness. Through this design we have a roller compacted concrete gravity dam design method, but also know that on the roller compacted concrete gravity dam of a number of important characteristics and the design should pay attention to local, from the completion of the professional knowledge to the

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