發(fā)布時(shí)間：2018-03-24 15:45

  本文選題：懸臂澆筑法　切入點(diǎn)：施工監(jiān)控　出處：《合肥工業(yè)大學(xué)》2015年碩士論文

【摘要】：橋梁工程在國(guó)內(nèi)外已發(fā)展多年,橋梁建設(shè)技術(shù)越趨于成熟。各類橋梁以及各種橋型都有不同的施工方法,每一種施工方法都有其自身的特點(diǎn)并且適用于不同的情況。由于當(dāng)今的橋梁越來(lái)越追求跨度大、成本低、質(zhì)量高,所以連續(xù)梁橋或者連續(xù)鋼構(gòu)橋等在國(guó)內(nèi)運(yùn)用的非常廣泛。懸臂澆筑法就是在這些橋梁施工中發(fā)展起來(lái)的,這種施工方法具有不需要搭設(shè)支架、多孔橋跨同時(shí)施工、掛籃可以重復(fù)使用等優(yōu)點(diǎn)。但是懸臂澆筑法也有其自身的缺點(diǎn),比如施工步驟較多、結(jié)構(gòu)參數(shù)較難控制等。橋梁施工技術(shù)的發(fā)展也提高了對(duì)橋梁建設(shè)的安全要求和質(zhì)量要求,橋梁的施工監(jiān)控就是為了解決這一問(wèn)題。本文系統(tǒng)的提出了懸臂澆筑法施工監(jiān)控的理論方法,并且詳細(xì)的說(shuō)明了監(jiān)控過(guò)程中具體步驟的實(shí)現(xiàn)。依托工程實(shí)例,把監(jiān)控理論知識(shí)運(yùn)用于實(shí)際工程中,成功的完成了一座連續(xù)梁橋的監(jiān)控分析。針對(duì)監(jiān)控的分析過(guò)程,指出了溫度對(duì)監(jiān)控在位移及應(yīng)力的影響并且提出了一些解決辦法。另外,由于在橋梁施工過(guò)程中一些相關(guān)因素的影響會(huì)造成參數(shù)的誤差,比如混凝土收縮徐變、預(yù)應(yīng)力誤差、掛籃剛度不確定性等。對(duì)這些參數(shù)的影響,引用了兩種參數(shù)識(shí)別方法進(jìn)行處理,它們分別是kalman濾波法和灰色理論。本文主要通過(guò)運(yùn)用灰色理論的求解方法部分消除了這些誤差的影響,使監(jiān)控的過(guò)程盡量的符合實(shí)際。本文完整的運(yùn)用了現(xiàn)有的橋梁監(jiān)控方法對(duì)橋梁進(jìn)行了監(jiān)測(cè),對(duì)橋梁結(jié)構(gòu)進(jìn)行有限元建模,劃分施工階段,把復(fù)雜的施工步驟簡(jiǎn)單化。從整個(gè)施工監(jiān)控的高度識(shí)別有可能存在的誤差并且加以解決,完善和補(bǔ)充了當(dāng)前橋梁監(jiān)控技術(shù)的不足。
[Abstract]:Bridge engineering has been developed for many years at home and abroad, and the technology of bridge construction is becoming more and more mature. All kinds of bridges and all kinds of bridge types have different construction methods. Each construction method has its own characteristics and is suitable for different situations. Therefore, continuous beam bridges or continuous steel bridges are widely used in China. Cantilever casting method is developed in these bridges construction, this construction method has no need to build support, porous bridge span construction at the same time, The hanging basket can be used repeatedly, but the cantilever casting method also has its own disadvantages, such as more construction steps, more difficult to control structural parameters, etc. The development of bridge construction technology also improves the safety requirements and quality requirements for bridge construction. In order to solve this problem, this paper systematically puts forward the theory and method of cantilever pouring construction monitoring, and explains in detail the realization of concrete steps in the monitoring process. The monitoring theory is applied to the practical engineering, and the monitoring analysis of a continuous beam bridge is successfully completed. In view of the monitoring analysis process, the influence of temperature on the displacement and stress of monitoring is pointed out and some solutions are put forward. Because of the influence of some related factors in the process of bridge construction, such as shrinkage and creep of concrete, prestress error, uncertainty of hanging basket stiffness and so on. Two kinds of parameter identification methods are introduced to process them, they are kalman filtering method and grey theory. In this paper, the influence of these errors is partly eliminated by using the method of solving grey theory. Make the monitoring process as far as possible in line with the reality. This paper uses the existing bridge monitoring methods to monitor the bridge, the bridge structure is modeled by finite element method, the construction phase is divided. The complicated construction steps are simplified, the possible errors are identified from the height of the whole construction monitoring and solved, and the deficiencies of the current bridge monitoring technology are perfected and supplemented.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.4

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