本文關(guān)鍵詞：大型沉管管節(jié)浮運(yùn)的阻力計(jì)算及方案研究　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 沉管隧道 浮運(yùn)安裝 港珠澳大橋 拖航阻力 方案推薦

【摘要】：沉管隧道工程是從上世紀(jì)初開始逐步發(fā)展起來的一種大型跨水交通工程,沉管隧道是由若干預(yù)制的管節(jié),分別浮運(yùn)到現(xiàn)場,一個(gè)接一個(gè)地沉放安裝,在水下將其互相連接并正確定位在已經(jīng)開挖的水下溝槽內(nèi),其后輔以相關(guān)工程施工,使這些管節(jié)組合體成為連接水體兩端陸上交通的隧洞型交通運(yùn)輸載體�；诖�,本文根據(jù)港珠澳大橋所屬的海洋環(huán)境設(shè)計(jì)了相應(yīng)的沉管隧道,為了將其托運(yùn)至指定區(qū)域,設(shè)計(jì)了三種托運(yùn)方案。同時(shí)需要計(jì)算每一種方案所需要克服的拖曳阻力,以便安排船舶。為此,本文分別采用《海上拖航指南》、《重力式碼頭設(shè)計(jì)與施工規(guī)范》和軟件AQWA進(jìn)行了計(jì)算,比較了三種的計(jì)算結(jié)果并選取了其中受到阻力最小方案作為后續(xù)計(jì)算的方案。同時(shí)研究了某一種托運(yùn)方案中不同干舷值、不同拖航速度、不同波浪和水流方向等情況下拖航阻力的大小。通過對(duì)相應(yīng)參數(shù)的研究,不難發(fā)現(xiàn),干舷值對(duì)拖航阻力影響不大；拖航阻力與拖航速度基本成二次方關(guān)系,隨著拖航相對(duì)速度的增加而增長很快；波浪阻力同波高也成二次方關(guān)系,而且受到拖航速度的影響；波浪與水流與拖航的角度也對(duì)拖航阻力有較大影響。并給出了一個(gè)海上拖航的推薦方案,可以供實(shí)際問題所借鑒。
[Abstract]:Sinking tunnel project is a kind of large-scale trans-water traffic project which has been developed gradually since the beginning of 0th century. The tunnel is made up of a number of prefabricated pipe sections, which are floated to the site and installed one by one. It is connected to each other under water and correctly positioned in the trench that has been excavated, followed by the construction of related projects. So that these pipe segments can be used as the tunnel transport carrier to connect the land traffic between the two ends of the water body. Based on this, this paper designs the corresponding immersed tunnel according to the marine environment of the HongKong-Zhuhai-Macao Bridge. In order to ship it to a designated area, three shipping schemes are designed. At the same time, it is necessary to calculate the drag resistance that each scheme needs to overcome in order to arrange the ship. For this reason, the "Maritime towing Guide" is adopted separately in this paper. The Code for Design and Construction of Gravity Wharf and the software AQWA are calculated. The results of three kinds of calculation are compared and the least resistance scheme is selected as the following calculation scheme. At the same time, different freeboard values and different towing speeds are studied in one kind of consignment scheme. Through the study of the corresponding parameters, it is not difficult to find that the freeboard value has little effect on the towing resistance. The relation between towing resistance and towing velocity is basically quadratic, and it increases rapidly with the increase of towing relative velocity. The wave resistance and wave height are also quadratic and affected by the towing velocity. The angle of wave, current and towing also has great influence on the drag of towing, and a recommended scheme of towing at sea is given, which can be used for reference in practice.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U455.4;U459.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 潘永仁;上海外環(huán)沉管隧道大型管段浮運(yùn)方法[J];施工技術(shù);2004年05期

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本文編號(hào)：1406338