本文選題：溢洪道 + 摻氣坎��； 參考：《河北工程大學(xué)》2014年碩士論文

【摘要】：溢洪道用于宣泄規(guī)劃庫容所不能容納的洪水，防止洪水漫溢壩頂，保證樞紐擋水建筑物及其它有關(guān)建筑物的安全運行，是整個樞紐中關(guān)鍵的組成部分。溢洪道能否安全的進(jìn)行工作，關(guān)系到整個水利樞紐的安危。對以往大壩失事的原因進(jìn)行分析后發(fā)現(xiàn)，，由于溢洪道泄流能力不足或設(shè)計、運用不當(dāng)引起的的大壩失事占很大比重。因此有必要對溢洪道的設(shè)計方案進(jìn)行物理模型試驗，并進(jìn)行優(yōu)化。 本文以X水庫樞紐為具體的研究對象，根據(jù)相關(guān)資料，對岸邊式溢洪道的摻氣坎、挑坎、尾墩、進(jìn)水口邊墻體型的優(yōu)化選擇進(jìn)行了模型試驗研究。首先對原設(shè)計方案進(jìn)行了水流形態(tài)研究，通過試驗分析，提出了方案存在的問題，給出了合理建議，確定了溢洪道的推薦體型。其次，在推薦體型下，對不同工況分別進(jìn)行試驗研究。得出如下結(jié)果：不管在閘門全開還是閘孔出流條件下，各級流量下泄時流量系數(shù)均隨流量增加逐漸緩慢增加，高水位時逐漸趨于穩(wěn)定；溢洪道具有超泄能力，滿足泄水能力要求；推薦體型下水流形態(tài)基本趨于正常，在控制段、泄槽段水深逐漸減�。恍共鄱瘟庑螞_擊波沖擊邊墻，局部水翅高度高于邊墻，建議在該處增加相應(yīng)的防護(hù)措施。各工況下溢洪道沿程均未出現(xiàn)負(fù)壓；挑坎挑出水流入水后向四周擴(kuò)散，各工況下左岸均有回流產(chǎn)生，河道右岸無回流產(chǎn)生，岸邊流速較大；隨著流量的增加，沖坑逐漸向河道下游推移，沖刷也越嚴(yán)重沖坑深度逐漸增大。
[Abstract]:Spillway is a key component of the whole project, which is used to drain the flood which can not be contained in the reservoir planning, prevent flood from overflowing the dam top, and ensure the safe operation of the water retaining structure and other related buildings of the hub. The safety of spillway is related to the safety of the whole hydro-junction. After analyzing the causes of dam failure in the past, it is found that the dam failure caused by improper use accounts for a large proportion due to insufficient discharge capacity or design of spillway. Therefore, it is necessary to carry out physical model test and optimize the design of spillway. In this paper, the X reservoir hub is taken as the specific research object. According to the relevant data, the optimization selection of aeration ridges, tail piers and side walls of the inlets of the shore spillway is studied by model test. Firstly, the flow pattern of the original design is studied, the problems of the scheme are put forward, the reasonable suggestions are given, and the recommended shape of the spillway is determined. Secondly, under the recommended body size, the experimental study was carried out under different working conditions. The results are as follows: no matter when the sluice gate is completely open or under the condition of sluice outlet discharge, the discharge coefficient increases slowly with the increase of discharge rate, and becomes stable at high water level, and the spillway has the ability of overdischarge. To meet the requirements of discharge capacity; the recommended shape of the flow form is basically normal, in the control section, the depth of the sluice section gradually decreases; the rhombus shock wave of the vent section hits the side wall, local water wing height is higher than the side wall, It is suggested that appropriate protective measures should be added to the area. There is no negative pressure along the spillway under various working conditions. The spillway flows into the water and diffuses around it. Under each working condition, there is a backflow on the left bank, no backflow on the right bank of the river, and a larger flow rate along the shore. With the increase of the flow rate, The scour pit gradually moves downstream, and the more serious the scour depth is, the greater the depth of the scour pit is.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV651.1;TV131.6

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