【摘要】：促淤技術(shù)的研究對(duì)于圍海造地、灘涂開(kāi)發(fā)以及保護(hù)濕地等都具有重要的理論與實(shí)際意義。因此，對(duì)于更為高效廉價(jià)的促淤技術(shù)的研究，成為越來(lái)越多國(guó)內(nèi)外學(xué)者研究的課題。 本文在現(xiàn)有的對(duì)于單個(gè)柔性促淤浮簾水動(dòng)力特性及促淤積機(jī)理研究的基礎(chǔ)上，針對(duì)促淤浮簾群，通過(guò)室內(nèi)水槽實(shí)驗(yàn)，對(duì)促淤浮簾群內(nèi)外層浮簾系纜力及其促淤積效果開(kāi)展研究。主要工作內(nèi)容和研究成果如下： （1）通過(guò)定床實(shí)驗(yàn)，觀測(cè)了均勻恒定流和垂直作用下浮簾群的浮簾系纜力變化規(guī)律。研究表明，浮簾群內(nèi)最大系纜力與靜水浮力比值受到浮簾覆蓋率、來(lái)流弗汝德數(shù)以及浮簾相對(duì)高度的影響，促淤浮簾群內(nèi)相同位置的浮簾系纜力隨著來(lái)流弗汝德數(shù)的增加呈現(xiàn)先增大后減小的變化趨勢(shì)；隨著浮簾覆蓋率的增大，呈現(xiàn)先增大后減小再增大的變化趨勢(shì)；隨著浮簾相對(duì)高度增大，呈現(xiàn)逐步增大的趨勢(shì)。 （2）利用實(shí)測(cè)資料，通過(guò)量綱及回歸分析得到了計(jì)算浮簾群內(nèi)最大系纜力的經(jīng)驗(yàn)公式。 （3）通過(guò)動(dòng)床實(shí)驗(yàn)，對(duì)于促淤浮簾群的促淤效果進(jìn)行了初步分析研究，，得到促淤浮簾群的促淤效果主要受浮簾覆蓋率、來(lái)流弗汝德數(shù)以及浮簾相對(duì)高度的影響，促淤浮簾群具有良好的促淤效果。 （4）利用實(shí)測(cè)資料，通過(guò)量綱及回歸分析得到了計(jì)算浮簾群內(nèi)促淤積厚度的經(jīng)驗(yàn)公式。 本文的研究結(jié)果表明：促淤浮簾群安裝簡(jiǎn)便，穩(wěn)定性好，促淤效果明顯，具有很好的工程應(yīng)用價(jià)值。
[Abstract]:The research of siltation promoting technology is of great theoretical and practical significance for reclamation, tidal flat development and wetland protection. Therefore, more and more scholars at home and abroad are studying the more efficient and cheap technology of promoting siltation. On the basis of the research on hydrodynamic characteristics and silting mechanism of single flexible silting promoting curtain, this paper studies the force and silting effect of the outer layer of the floating curtain system in the silting promoting floating curtain group through indoor flume experiment. The main work and research results are as follows: (1) the variation of cable force of floating curtain group under uniform constant flow and vertical action is observed through fixed bed experiment. The results show that the ratio of maximum mooring cable force to hydrostatic buoyancy in floating curtain group is affected by the coverage of floating curtain, the number of flow Froude and the relative height of floating curtain. The force of floating cord in the same position of the silting floating curtain group increased firstly and then decreased with the increase of the Froude number. With the increase of floating curtain coverage, the floating curtain increased first and then decreased and then increased, and gradually increased with the increase of relative height of floating curtain. (2) based on the measured data, the empirical formula for calculating the maximum mooring force in floating curtain group is obtained by dimensionality and regression analysis. (3) through moving bed experiment, the silting effect of silting promoting floating curtain group is analyzed and studied. It is concluded that the silting effect of silting promoting floating curtain group is mainly affected by floating curtain coverage, flow Froude number and relative height of floating curtain. The siltation promoting floating curtain group has good silting effect. (4) based on the measured data, the empirical formula for calculating the deposition thickness in floating curtain group is obtained by dimensional and regression analysis. The results of this paper show that the silt-promoting floating curtain group is easy to install, stable, and has obvious effect of siltation promotion, and has good engineering application value.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U655.5

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本文編號(hào)：2319781