【摘要】：船行波導致的河岸侵蝕對土地資源和堤防構成威脅。游艇體量小,其危害往往被忽視,然而快速航行的游艇會對河岸產(chǎn)生嚴重損壞。目前量化評估船行波侵蝕河岸的文獻很少。建立船行波引起河岸侵蝕后退的估算模型,并結合鄂州市長港河侵蝕進行實例計算。研究過程由三部分組成:一是現(xiàn)場勘測和調(diào)研,包括采集河岸土樣,測量河道特征參數(shù),調(diào)查長港河船舶類型、船舶技術參數(shù)及各類船舶每天航行頻次;二是開展室內(nèi)土工試驗,測定土樣顆粒級配曲線和臨界剪應力,以評估河岸的抗侵蝕性;三是開展河岸侵蝕的數(shù)值計算,包括計算游艇船行波要素,采用側(cè)向侵蝕模型計算河岸侵蝕率。計算結果表明,在游艇船行波侵蝕作用下,長港河河岸年平均侵蝕后退54.4 cm,與現(xiàn)場調(diào)研結果基本相符。
[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.
【作者單位】： 武漢大學水資源與水電工程科學國家重點實驗室;
【基金】：中央高�；究蒲袠I(yè)務費專項(2042016KF1070)
【分類號】：TV139.2;U661

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