黄河双旋沟滩水流特性及整治技术研究

发布时间：2018-02-26 22:26

本文关键词： 双旋沟滩复杂滩险整治方案河工物理模型数学模型　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：按照《甘肃省内河水运发展规划》，黄河上游干流乌金峡库区及龙湾至南长滩段为V级航道标准。该河段共有12个滩险，其中双旋沟滩位于白银市境内，该滩属于中洪水急流险滩兼枯水汊道浅险滩性质的复杂滩险，集急、浅、窄、汊、险等碍航特征，对整个工程河段的改善起到关键控制性作用。本文采用以河工物理模型为主、河流数值模拟为辅的研究方法，对双旋沟滩河道的碍航特征、水流特性以及泥沙输移等进行了观测和分析。先运用物理模型试验方法在初步设计方案基础上研究并提出三组优化方案，以改善该河段的通航水流条件，通过三组试验方案的对比优选了方案三作为推荐整治方案，在此基础上运用数值模拟的方法计算推荐方案的水流特性，验证推荐方案的合理性。在推荐方案中：上部弯曲段采取切嘴、填槽措施，顺直过渡段采取切嘴措施，中部扩宽段采取疏浚、填沱、挖槽、丁坝的措施，下部深槽段采取潜坝、切嘴的措施。改善了上段较严重涡旋水、扫弯水、水流急、比降大等问题，解决了中段航深浅、比降大、流速大、泡漩水、泥沙淤积等问题，解决了下段比降大，流速急、航道窄、极乱流等问题。对于初步设计方案中的航线，，提出在中小流量下，船舶在设计航线中可安全上下航行，建议在大流量下，船舶选择设计航线偏左的缓流航线为上水航线，下水航线可选择设计航槽线。
[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.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U612.23;U617

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