水力插板透水丁坝数值模拟初步研究

发布时间：2018-10-29 17:56

【摘要】：在新疆沙漠段多沙河流治理与防洪工程中，传统的护岸建筑物已经不能满足新时期护岸的要求，研究更安全、更经济、更有效、更亲水的新型护岸建筑物，已经成为一项紧迫任务。与此同时，透水丁坝理论和水力插板技术在国内得到了迅速的发展，本文首次将两者有效结合，，提出一种新型透水护岸建筑物—水力插板透水丁坝。水力插板透水丁坝不仅能调水调沙，稳定河势，起到护岸的作用，而且能达到堤岸安全、施工快速、工程投资少的目的。水力插板透水丁坝数值模拟研究，可与物理模型研究相互验证、补充，为这项新技术在新疆塔里木河流域粉细砂地层河道治理与防洪工程中的应用提供理论依据。本文对水力插板技术的研究、透水丁坝结构及特性的研究以及透水丁坝的紊流数值模拟的研究进行了详尽的回顾和评述。在前人研究成果的基础上，建立了水力插板透水丁坝水流概化模型，并验证了模型的正确性。利用数值模拟的计算方法，通过与实体丁坝、井柱桩透水丁坝的对比计算，证明了水力插板透水丁坝具有调水调沙、缓流促淤的护岸效果。运用流体力学等理论方法和数值模拟方法，分别模拟不同的透水孔型式和布置方式下的水流结构、流速场，最终选出有利于缓流促淤、保滩护岸的透水孔结构型式。通过数值模拟的方法，以水流对坝体的不利影响最小和水力插板透水丁坝缓流促淤的防护效果最好两方面作为评定原则，确定水力插板透水丁坝透水率、有效坝长、挑角、流速等关键水力学参数的合理取值范围。
[Abstract]:In the flood control and flood control projects of sandy rivers in the desert section of Xinjiang, the traditional revetment buildings can no longer meet the requirements of bank protection in the new period, and study new types of revetment buildings that are safer, more economical, more effective and more hydrophilic. Has become an urgent task. At the same time, the theory of permeable spur dike and hydraulic plug board technology have been developed rapidly in our country. In this paper, a new type of permeable embankment building, hydraulic plug plate dike, is put forward by combining them effectively for the first time. Hydraulic plug plate permeable groin can not only transfer water and sand, stabilize river regime and protect bank, but also achieve the purpose of bank safety, fast construction and less project investment. The numerical simulation of hydraulic plug plate permeable spur dike can be verified and supplemented with physical model research, which provides a theoretical basis for the application of this new technology in the river course control and flood control engineering of silt formation in Tarim River Basin, Xinjiang. In this paper, the research of hydraulic plug plate technology, the structure and characteristics of permeable spur dike and the numerical simulation of turbulent flow of permeable spur dike are reviewed and reviewed in detail. Based on the previous research results, a generalizable model of hydraulic plug plate permeable spur dike flow is established, and the correctness of the model is verified. By using the method of numerical simulation and comparing with the solid dike and pile dike, it is proved that the hydraulic plug dimple dike has the effect of water and sediment regulation, slow flow and siltation. In this paper, hydrodynamics and numerical simulation methods are used to simulate the flow structure and velocity field under different permeable hole types and arrangement modes respectively. Finally, the structure types of permeable holes which are favorable to slow flow and siltation and bank protection are selected. By means of numerical simulation, taking the minimum adverse effect of water flow on the dam body and the best two aspects of the protective effect of hydraulic plug plate permeable groin dam as evaluation principles, the permeability rate, effective dam length and angle of penetration of hydraulic plug plate spur dike are determined. Reasonable range of hydraulic parameters such as velocity.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV863

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