發(fā)布時(shí)間：2018-07-22 21:09

【摘要】：船行波導(dǎo)致的河岸侵蝕對(duì)土地資源和堤防構(gòu)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(huì)對(duì)河岸產(chǎn)生嚴(yán)重?fù)p壞。目前量化評(píng)估船行波侵蝕河岸的文獻(xiàn)很少。建立船行波引起河岸侵蝕后退的估算模型,并結(jié)合鄂州市長(zhǎng)港河侵蝕進(jìn)行實(shí)例計(jì)算。研究過程由三部分組成:一是現(xiàn)場(chǎng)勘測(cè)和調(diào)研,包括采集河岸土樣,測(cè)量河道特征參數(shù),調(diào)查長(zhǎng)港河船舶類型、船舶技術(shù)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(yàn),測(cè)定土樣顆粒級(jí)配曲線和臨界剪應(yīng)力,以評(píng)估河岸的抗侵蝕性;三是開展河岸侵蝕的數(shù)值計(jì)算,包括計(jì)算游艇船行波要素,采用側(cè)向侵蝕模型計(jì)算河岸侵蝕率。計(jì)算結(jié)果表明,在游艇船行波侵蝕作用下,長(zhǎng)港河河岸年平均侵蝕后退54.4 cm,與現(xiàn)場(chǎng)調(diào)研結(jié)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(xué)水資源與水電工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)(2042016KF1070)
【分類號(hào)】：TV139.2;U661

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