本文關鍵詞： 雙旋溝灘 復雜灘險 整治方案 河工物理模型 數(shù)學模型　出處：《重慶交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：按照《甘肅省內(nèi)河水運發(fā)展規(guī)劃》，黃河上游干流烏金峽庫區(qū)及龍灣至南長灘段為V級航道標準。該河段共有12個灘險，其中雙旋溝灘位于白銀市境內(nèi)，該灘屬于中洪水急流險灘兼枯水汊道淺險灘性質(zhì)的復雜灘險，集急、淺、窄、汊、險等礙航特征，對整個工程河段的改善起到關鍵控制性作用。 本文采用以河工物理模型為主、河流數(shù)值模擬為輔的研究方法，對雙旋溝灘河道的礙航特征、水流特性以及泥沙輸移等進行了觀測和分析。先運用物理模型試驗方法在初步設計方案基礎上研究并提出三組優(yōu)化方案，以改善該河段的通航水流條件，通過三組試驗方案的對比優(yōu)選了方案三作為推薦整治方案，在此基礎上運用數(shù)值模擬的方法計算推薦方案的水流特性，驗證推薦方案的合理性。 在推薦方案中：上部彎曲段采取切嘴、填槽措施，順直過渡段采取切嘴措施，中部擴寬段采取疏浚、填沱、挖槽、丁壩的措施，下部深槽段采取潛壩、切嘴的措施。改善了上段較嚴重渦旋水、掃彎水、水流急、比降大等問題，解決了中段航深淺、比降大、流速大、泡漩水、泥沙淤積等問題，解決了下段比降大，流速急、航道窄、極亂流等問題。 對于初步設計方案中的航線，，提出在中小流量下，船舶在設計航線中可安全上下航行，建議在大流量下，船舶選擇設計航線偏左的緩流航線為上水航線，下水航線可選擇設計航槽線。
[Abstract]:According to the "Development Plan of Inland River Transport in Gansu Province", the Wujin Gorge Reservoir area of the upper reaches of the Yellow River and the section of Longwan to the South long Beach are the standard of the V-class channel. There are 12 beach risks in this section, in which the Shuangxingou Beach is located in Baiyin City. The beach belongs to the complex beach risk of the nature of the middle flood rapids and the shallow banks of the low branch channel. It has the characteristics of aggravation, shallowness, narrowness, branching, danger, and so on, which plays a key controlling role in the improvement of the whole river reach of the project. In this paper, based on the physical model of river engineering and supplemented by numerical simulation of river, the characteristics of hindrance to navigation in the channel of double circumflex gully beach are studied. The characteristics of water flow and sediment transport are observed and analyzed. Firstly, based on the preliminary design scheme, the physical model test method is used to study and put forward three groups of optimization schemes to improve the navigable flow conditions in the reach of the river. According to the comparison of three groups of experimental schemes, the third scheme is selected as the recommended regulation scheme. On this basis, the flow characteristics of the recommended scheme are calculated by numerical simulation method, and the rationality of the recommended scheme is verified. In the recommended scheme, the upper curved section adopts the measures of cutting mouth and filling slot, the section of straight transition adopts the measure of cutting mouth, the middle section of widening adopts the measures of dredging, filling, dredging, grooving, and the lower part of deep groove adopts submersible dam, The measures of cutting mouth have improved the problems of more serious vortex water, sweep and bend water, rapidity of water flow, and large specific drop in the upper section, solved the problems of deep and shallow, large specific drop, high velocity of velocity, bubble water, silt deposition, etc., and solved the problems of the lower section, such as large specific drop and rapid velocity of velocity, etc. Narrow channels, extreme turbulence, etc. For the route in the preliminary design scheme, it is proposed that the ship can safely navigate up and down in the designed route under the condition of medium and small flow, and it is suggested that under the condition of large volume of traffic, the ship should choose the slow current route on the left side of the designed route as the Sheung Shui route. The launching route can be selected to design the channel line.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U612.23;U617

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