本文選題：三峽工程 + 庫(kù)尾河段�。� 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：上世紀(jì)70年代,為滿足三線企業(yè)運(yùn)輸和配合重慶蘭家沱港口建設(shè),由交通部組織對(duì)長(zhǎng)江上游江津至重慶河段航道進(jìn)行了整治(即渝蘭段航道整治工程)。其中在燕子磧、苦竹磧、小南海、渣角和磚灶子等5處布置了航道整治建筑物共計(jì)13處。而重慶主城區(qū)河段由于周邊環(huán)境復(fù)雜,涉水設(shè)施眾多,治理難度較大,未布置整治建筑物進(jìn)行治理,主要采用維護(hù)性疏浚手段進(jìn)行航道維護(hù)。2008年汛后三峽工程175m試驗(yàn)性蓄水后,該河段受樞紐調(diào)度影響,來(lái)水來(lái)沙條件發(fā)生了較大變化,已治理河段的整治效果、河床演變規(guī)律及航道條件等均會(huì)發(fā)生了相應(yīng)的變化。因此,分析研究河段在三峽工程蓄水后河床演變、已建工程整治效果的變化情況,分析提出研究河段航道整治基本參數(shù)是十分必要的。 本研究以三峽工程庫(kù)尾江津至重慶河段已整治的5處灘段為研究對(duì)象,研究分析三峽工程蓄水后該河段水沙條件、河床演變規(guī)律的變化情況；利用近年實(shí)測(cè)資料分析已建工程整治效果；并根據(jù)研究河段河床演變及航道條件的變化,結(jié)合目前新的水沙條件,提出該河段后續(xù)治理工程整治基本參數(shù)。得出以下結(jié)論： (1)三峽工程蓄水后,變動(dòng)回水區(qū)河段水面線發(fā)生了較大變化,隨著壩前水位抬升,回水末段逐漸上移,水面線逐漸趨平。研究河段上、下游控制性水文站朱沱站和寸灘站由于受樞紐運(yùn)行影響,近年水沙特征值均發(fā)生了顯著變化,直接造成研究河段來(lái)水來(lái)沙條件及河床演變規(guī)律發(fā)生了相應(yīng)變化。 (2)三峽工程蓄水以來(lái),變動(dòng)回水區(qū)局部河段近岸的回流區(qū)、緩流區(qū)內(nèi)以及分汊放寬河道的支漢內(nèi)泥沙有所淤積。部分已建整治工程河段主河道也有泥沙累積性淤積趨勢(shì)。研究河段來(lái)水來(lái)沙條件的變化,造成河床發(fā)生了相應(yīng)調(diào)整,部分已建整治工程的整治效果較天然情況下減弱,給通航帶來(lái)了一定的負(fù)面影響。 (3)本研究根據(jù)目前新的水沙條件和河床演變情況,對(duì)典型河段磚灶子灘最低通航水位、上灘水力指標(biāo)、整治水位及整治線寬度等航道整治工程的基本參數(shù)進(jìn)行了分析,可為今后該河段航道治理工程的實(shí)施提供借鑒。
[Abstract]:In the 1970s, in order to satisfy the transportation of the third line enterprises and cooperate with the construction of Lanjiatuo port in Chongqing, the Ministry of Communications organized the regulation of the waterway from Jiang Jin to Chongqing in the upper reaches of the Yangtze River (that is, the waterway regulation project of the Yulan section). Among them, 13 waterway regulation buildings were arranged in 5 places, such as swallow moraine, Kudu moraine, Xiaonanhai, slag angle and brick zaozi. However, due to the complex surrounding environment, numerous water wading facilities and difficulty in harnessing the main urban area of Chongqing, the river reach of Chongqing main urban area is mainly maintained by maintenance dredging after the 175m experimental water storage of the three Gorges Project after the flood in 2008. Influenced by the operation of the hub, the conditions of incoming water and sediment have changed greatly, and the regulation effect, the evolution law of the river bed and the condition of the channel have all changed correspondingly. Therefore, it is very necessary to analyze and study the evolution of river bed after the three Gorges Project impoundment and the change of regulation effect of the built project. It is very necessary to study the basic parameters of channel regulation in the river reach. In this study, the water and sediment conditions and the variation of riverbed evolution law in the Jiang Jin reach of the three Gorges Project after impoundment were studied and analyzed with regard to the five beach sections which had been regulated from the tail of the reservoir to the Chongqing reach. The regulation effect of the constructed project is analyzed by using the measured data in recent years, and based on the study of the river bed evolution and the changes of the channel conditions, combined with the current new water and sediment conditions, the basic parameters of the regulation for the subsequent regulation project of the river reach are put forward. Draw the following conclusions: 1) after the three Gorges Project impounded, the water surface line of the reach in the variable backwater area changed greatly. With the elevation of the water level in front of the dam, the end section of the backwater gradually moved up, and the water surface line gradually leveled off. Due to the influence of the hub operation, the characteristic values of water and sediment have changed significantly in recent years, which directly results in the corresponding changes in the conditions of water and sediment coming from the study reach and the evolution law of riverbed, due to the influence of the hub operation on the controlling hydrologic stations in the lower reaches of the river. 2) since the three Gorges Project impounded, the sediment in the inshore, slow-flow area and branch-relaxation channel of the local reach in the variable backwater area has been silted. There is also a tendency of sediment accumulation in the main channel of some constructed regulation projects. The study of the change of the conditions of the incoming water and sediment in the reach of the river resulted in the corresponding adjustment of the riverbed, and the regulation effect of some of the constructed regulation projects was weaker than that of the natural situation, which brought some negative effects to navigation. (3) based on the new conditions of water and sediment and the evolution of river bed, the basic parameters of waterway regulation works such as the lowest navigable water level, the hydraulic index of upper beach, the regulation water level and the width of regulation line are analyzed. It can provide reference for the implementation of waterway regulation project in the future.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TV147;U617

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本文編號(hào)：1985481