本文選題：雙龍河口 + 擋潮閘�。� 參考：《同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年05期

【摘要】：建閘河口整治工程引起的河床演變調(diào)整十分復(fù)雜.基于驗(yàn)證好的潮流、泥沙輸運(yùn)及河床演變模型分析了雙龍河口整治一期工程和二期工程后水動(dòng)力和河床演變的響應(yīng)特征.結(jié)果表明,閘下河道水動(dòng)力變化和河道沖淤分布與局部浚深拓寬及納潮量增加有密切聯(lián)系.若僅對(duì)河道上段局部河道進(jìn)行整治,浚深拓寬段的漲落潮不對(duì)稱(chēng)現(xiàn)象加劇,局部產(chǎn)生回流區(qū).若以固定坡降對(duì)整條河道進(jìn)行整治,則漲落潮流速顯著增加且不對(duì)稱(chēng)性減小.納潮量增加在工程初期會(huì)引起口門(mén)段沖刷,而局部拓寬段會(huì)因流速相對(duì)減小而產(chǎn)生淤積,特別是在回流區(qū)淤積嚴(yán)重.因此為延長(zhǎng)工程壽命,尚需輔以定期開(kāi)閘放水和局部清淤等措施.
[Abstract]:The river bed evolution and adjustment caused by the construction gate estuary regulation project is very complex. Based on the verified tidal current, sediment transport and riverbed evolution model are used to analyze the response characteristics of hydrodynamics and riverbed evolution after the first and second stage of Shuangyong Estuary Regulation Project. The results show that the hydrodynamic changes and the distribution of scour and silt are closely related to the widening of local dredging and the increase of tidal absorption. If only the upper part of the river is renovated, the asymmetry of the ebb and drop tide in the dredged widening section will be aggravated, and the local backflow area will be produced. If a fixed slope is used to regulate the whole river channel, the fluctuation tidal current velocity increases significantly and the asymmetry decreases. At the beginning of the project, the increase of tidal absorption will cause erosion of the entrance section, while the local widening section will be silted due to the relative decrease of the velocity of flow, especially in the backflow area. Therefore, in order to prolong the life of the project, some measures such as regular opening of water and local desilting are needed.
【作者單位】： 同濟(jì)大學(xué)土木工程學(xué)院;國(guó)家海洋局秦皇島海洋環(huán)境監(jiān)測(cè)中心站;河北省地礦局水文工程地質(zhì)勘查院;
【基金】：中央分成海域使用金項(xiàng)目(THY-2011)
【分類(lèi)號(hào)】：TV147;TV66

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