游艇波浪侵蚀长港河河岸的计算分析
发布时间：2018-07-22 21:09
【摘要】：船行波导致的河岸侵蚀对土地资源和堤防构成威胁。游艇体量小,其危害往往被忽视,然而快速航行的游艇会对河岸产生严重损坏。目前量化评估船行波侵蚀河岸的文献很少。建立船行波引起河岸侵蚀后退的估算模型,并结合鄂州市长港河侵蚀进行实例计算。研究过程由三部分组成:一是现场勘测和调研,包括采集河岸土样,测量河道特征参数,调查长港河船舶类型、船舶技术参数及各类船舶每天航行频次;二是开展室内土工试验,测定土样颗粒级配曲线和临界剪应力,以评估河岸的抗侵蚀性;三是开展河岸侵蚀的数值计算,包括计算游艇船行波要素,采用侧向侵蚀模型计算河岸侵蚀率。计算结果表明,在游艇船行波侵蚀作用下,长港河河岸年平均侵蚀后退54.4 cm,与现场调研结果基本相符。
[Abstract]:Riparian erosion caused by ship waves poses a threat to land resources and levees. The small size of yachts is often neglected, but fast sailing yachts can cause serious damage to the river banks. At present, there is little literature on quantitative assessment of ship traveling wave erosion of riverbanks. An estimation model of riverbank erosion receding caused by ship traveling wave is established, and an example is given to calculate the erosion of Changgang River in Ezhou City. The research process consists of three parts: first, site survey and investigation, including collection of riverbank soil samples, measurement of river channel characteristic parameters, investigation of the types of ships in Changgang River, technical parameters of ships and daily sailing frequency of all kinds of ships; The second is to carry out indoor geotechnical tests to determine the gradation curve and critical shear stress of soil samples in order to evaluate the erosion resistance of riverbanks, and the third is to carry out numerical calculation of riverbank erosion, including the calculation of the traveling wave elements of yachts. The lateral erosion model was used to calculate the erosion rate of river banks. The calculated results show that, under the action of cruise wave, the average annual erosion back of the river bank of Changgang River is 54.4 cm, which is basically consistent with the field investigation results.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;
【基金】：中央高校基本科研业务费专项(2042016KF1070)
【分类号】：TV139.2;U661
本文编号：2138581
[Abstract]:Riparian erosion caused by ship waves poses a threat to land resources and levees. The small size of yachts is often neglected, but fast sailing yachts can cause serious damage to the river banks. At present, there is little literature on quantitative assessment of ship traveling wave erosion of riverbanks. An estimation model of riverbank erosion receding caused by ship traveling wave is established, and an example is given to calculate the erosion of Changgang River in Ezhou City. The research process consists of three parts: first, site survey and investigation, including collection of riverbank soil samples, measurement of river channel characteristic parameters, investigation of the types of ships in Changgang River, technical parameters of ships and daily sailing frequency of all kinds of ships; The second is to carry out indoor geotechnical tests to determine the gradation curve and critical shear stress of soil samples in order to evaluate the erosion resistance of riverbanks, and the third is to carry out numerical calculation of riverbank erosion, including the calculation of the traveling wave elements of yachts. The lateral erosion model was used to calculate the erosion rate of river banks. The calculated results show that, under the action of cruise wave, the average annual erosion back of the river bank of Changgang River is 54.4 cm, which is basically consistent with the field investigation results.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;
【基金】：中央高校基本科研业务费专项(2042016KF1070)
【分类号】：TV139.2;U661
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