本文選題：西津水利樞紐 + 二線船閘　； 參考：《重慶交通大學(xué)》2013年碩士論文

【摘要】：水運貨運量是確定水運交通基礎(chǔ)設(shè)施建設(shè)規(guī)模的主要依據(jù),貨運量預(yù)測結(jié)果的合理性、可靠性直接影響水運工程項目的投資和效益,對制定未來水運發(fā)展戰(zhàn)略、合理利用資源、充分發(fā)揮水運設(shè)施的效益等方面都有著極其重要的影響。船閘貨運量是衡量內(nèi)河航運發(fā)展的一項重要指標(biāo),其影響因素多。本文以西津水利樞紐二線船閘為樣本,結(jié)合西津水利樞紐腹地經(jīng)濟發(fā)展及水運量現(xiàn)狀和發(fā)展趨勢,運用宏觀整體預(yù)測和微觀分析的綜合預(yù)測方法,采用回歸分析模型、三次指數(shù)平滑法、抽象方式選擇模型、增長系數(shù)法四種數(shù)學(xué)方法,預(yù)測了西津水利樞紐中長期過閘貨運量需求,預(yù)計西津水利樞紐過閘貨運量2020年、2030年、2040年將分別達(dá)1690萬噸、2760萬噸、3720萬噸。合理確定西津水利樞紐二線船閘的建設(shè)規(guī)模為按最大通過3000t級船舶的Ⅰ級船閘建設(shè)。 通航建筑物的進(jìn)出口區(qū)域,通常是指船閘上、下游引航道與河流(或運河)相連接的口門區(qū),是船閘進(jìn)出口與河道自由航行河段起紐帶作用的區(qū)域,是過閘船舶(隊)進(jìn)出引航道的咽喉。當(dāng)引航道軸線與河段主流成一定夾角時,引航道口門區(qū)常出現(xiàn)一種作用在船舶側(cè)面的不利航行的復(fù)雜流態(tài)—“斜向流”。由于“斜向流”的作用,將迫使進(jìn)出船閘的船舶扭轉(zhuǎn)和強烈震動顛簸漂移,偏離航跡線而觸碰引航墻,對船舶航行是不安全的。因此,在各種通航樞紐設(shè)計時,需要對通航建筑平面布置進(jìn)行模型試驗,包括物理模型和數(shù)學(xué)模型,認(rèn)識了解影響口門區(qū)水流條件的情況,分析斜向水流形成原因,進(jìn)而提出改善口門區(qū)水流條件的種種措施,是非常具有現(xiàn)實意義的。 鑒于通航建筑物的復(fù)雜性,本文以西津水利樞紐二線船閘工程為基礎(chǔ),通過對其建立物理模型,經(jīng)水面線及流速驗證,達(dá)到與原型相似的要求,模型能夠較準(zhǔn)確地反映試驗河段的水流運動特性。針對上、下引航道原方案布置和河型河勢及地形等特點,進(jìn)行了多方案對比試驗,結(jié)果表明： 1)由于西津水利樞紐二線船閘上引航道口門區(qū)處于彎曲河段彎道上游,上引航道軸線與主流之間的夾角較大,致使口門區(qū)存在較強橫流；同時在引航道內(nèi)形成大范圍的回流,當(dāng)入庫流量較大(Q9122m3/s),泄洪閘全部敞泄時,原設(shè)計方案上引航道口門區(qū)縱向、橫向及回流流速均超過規(guī)范允許值。模型通過多方案的對比試驗：采取加長分水墻和調(diào)整開挖邊線等措施,使上引航道口門內(nèi)、外的水流條件得到明顯改善,在流量Q≤9122m3/s時,除個別點外,各項流速指標(biāo)均能夠滿足相關(guān)規(guī)范要求。 2)由于西津水利樞紐船閘下引航道布置于彎曲河道彎頂附近,二線船閘下引航道口門區(qū)水流條件將受彎道水流、樞紐調(diào)度和運行方式的影響較大,通過調(diào)整引航道布置,一、二線船閘下引航道分開布置,適當(dāng)加長一、二線之間隔流堤長度,調(diào)順下泄水流方向,改善一、二線船閘下引航道口門區(qū)的水流流態(tài),使口門區(qū)通航水流指標(biāo)基本能夠滿足規(guī)范要求。
[Abstract]:The water transport volume is the main basis to determine the scale of the infrastructure construction of the water transport traffic. The rationality of the forecast results of the freight volume, the reliability directly affects the investment and the benefit of the water transportation project, and has a very important influence on the formulation of the future water transportation development strategy, the rational utilization of resources and the full play of the benefits of the water transport facilities. The sluice freight volume is an important index to measure the development of inland river shipping. In this paper, taking the second line ship lock of Xijin water control project as the sample, combined with the current situation and development trend of the economic development and the water transport volume in the hinterland of the Xijin water control project, the regression analysis model is adopted for the three times. The index smoothing method, the abstract mode selection model and the growth coefficient method are four mathematical methods to predict the long term transit demand in the Xijin water control project. It is estimated that the transport volume of the Xijin water control project in 2020, 2030, and 2040 will reach 16 million 900 thousand tons, 27 million 600 thousand tons and 37 million 200 thousand tons respectively. For the construction of grade I shiplock according to the maximum 3000t class ship.
The import and export area of a navigable building, usually refers to the gate on the ship lock, the downstream channel and the river (or canal), which is the link between the import and export of the ship lock and the free channel of the river, and the throat of the passage of the ship (team) entering and entering the channel. A complex flow of adverse navigation, which acts on the side of a ship, often appears, "oblique flow". Due to the effect of "oblique flow", it will force the ship's torsional and strong vibration to move in and out of the ship lock, deviate from the track line and touch the pilotage wall. It is unsafe for the ship to navigate. The model test of the building layout, including the physical model and the mathematical model, understands the conditions affecting the flow conditions in the mouth area, analyzes the reasons for the formation of the oblique flow, and then puts forward various measures to improve the flow conditions in the entrance area, which is of great practical significance.
In view of the complexity of navigation buildings, this paper, based on the second line ship lock project of Xijin water control project, establishes a physical model through the verification of the surface line and flow velocity to meet the requirements of the prototype similar to that of the prototype. The model can accurately reflect the flow characteristics of the test river section. The comparison of different schemes has been carried out, and the results show that:
1) because the entrance area of the upper channel entrance area of the second route ship lock in the Xijin water control project is in the upper bend of the bend channel, the angle between the axis of the upper channel and the main stream is larger, resulting in strong crossflow in the entrance area, and a large reflux in the navigation channel is formed, and when the discharge flow is large (Q9122m3/s), the original design scheme is on the original design scheme. The longitudinal, lateral and reflux velocity of the entrance area of the pilot channel are more than the standard allowable values. Through the comparison test of the multi scheme, the flow conditions in the entrance gate of the upper channel are obviously improved by adopting the measures of lengthening the water wall and adjusting the border line, and the flow velocity indexes can be satisfied in the case of the flow rate of Q < < 9122m3/s. Relevant specification requirements.
2) due to the arrangement of the downstream channel of the Xijin water project in the vicinity of the curved top of the curved channel, the flow conditions in the entrance area of the lower channel entrance of the second line ship lock will be affected by the flow of the bend, and the mode of dispatch and operation of the hub is greatly influenced. By adjusting the layout of the navigation channel, the first and second line ship locks are arranged separately and the length of the dike between the first and second lines is properly lengthened. Adjust the flow direction to improve the flow pattern of the lower entrance channel of the first and second shiplock, so that the navigable flow index in the entrance area can basically meet the specifications.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：U641.2;U695.2

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