本文選題：懸臂施工　切入點(diǎn)：連續(xù)梁　出處：《蘭州交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾年來,隨著我國(guó)高速鐵路的大規(guī)模建設(shè),急需修建更多的大跨度橋梁以跨越大江、大河和海灣等障礙物。預(yù)應(yīng)力混凝土連續(xù)梁橋在鐵路客運(yùn)專線橋梁中占據(jù)了越來越大的比重,同時(shí)懸臂澆筑施工法近年來也得到較快的發(fā)展,我國(guó)已建成的跨度較大的預(yù)應(yīng)力混凝土連續(xù)梁橋大部分采用此法施工。連續(xù)梁橋變形小,剛度大,抗震能力強(qiáng),行車條件好,養(yǎng)護(hù)簡(jiǎn)單。連續(xù)梁橋在生活中是一種比較常見的結(jié)構(gòu)形式,本次設(shè)計(jì)我們主要針對(duì)的是連續(xù)梁中的典型代表:預(yù)應(yīng)力混凝土連續(xù)梁橋。另外,對(duì)采用懸臂澆筑施工的橋梁,為確保橋梁結(jié)構(gòu)合攏精度、成橋線形和運(yùn)營(yíng)一定時(shí)間后能達(dá)到設(shè)計(jì)所要求的標(biāo)高,需要對(duì)施工過程中橋梁結(jié)構(gòu)各部分的變形進(jìn)行監(jiān)測(cè)與監(jiān)控。懸臂澆筑橋梁的施工監(jiān)控主要包括結(jié)構(gòu)線形和結(jié)構(gòu)應(yīng)力兩方面內(nèi)容,必須進(jìn)行全面跟蹤控制才能使橋梁施工順利進(jìn)行,達(dá)到設(shè)計(jì)標(biāo)準(zhǔn)。通過背景工程橋結(jié)構(gòu)分析模型,選擇合適結(jié)構(gòu)參數(shù)識(shí)別,充分考各種影響因素,經(jīng)計(jì)算監(jiān)測(cè)、預(yù)測(cè),實(shí)現(xiàn)大橋線形和應(yīng)力的不斷調(diào)和控制,達(dá)到了預(yù)定的目標(biāo)。目前,雖然懸臂對(duì)稱施工方法已比較成熟,但高速鐵路的高標(biāo)準(zhǔn)要求又對(duì)該施工方法提出了更高的要求。本文結(jié)合沙河特大橋的施工,對(duì)三跨連續(xù)梁的懸臂施工技術(shù)做了詳細(xì)的介紹。首先對(duì)目前國(guó)、內(nèi)外的混凝土連續(xù)梁梁懸臂施工技術(shù)做了概括總結(jié)。其次,結(jié)合背景工程介紹了連續(xù)梁懸臂施工中的0#塊施工技術(shù)、掛籃施工技術(shù)并詳細(xì)闡述了托架的設(shè)計(jì)、檢算和線性觀測(cè)過程。然后,介紹了三跨連續(xù)梁橋的合攏技術(shù),并結(jié)合背景工程提出了合攏段施工關(guān)鍵技術(shù)的解決方案。最后,本文結(jié)合背景沙河特大橋(60+100+60)m三跨連續(xù)梁的施工,對(duì)三跨連續(xù)梁橋施工方法、施工監(jiān)控技術(shù)的介紹,論述了橋梁施工控制的重要性。并采用大型橋梁專業(yè)計(jì)算軟件Midas/civil對(duì)該三跨連續(xù)梁橋進(jìn)行有限元模擬分析,得到了與施工監(jiān)控相關(guān)的位移、應(yīng)力的理論值。論文結(jié)合背景工程對(duì)三跨連續(xù)梁懸臂施工技術(shù)進(jìn)行了詳盡的闡述,給出了三跨連續(xù)梁懸臂施工過程中的關(guān)鍵技術(shù)的解決方案。對(duì)以后同類橋型的建設(shè)起到了一定的指導(dǎo)作用。
[Abstract]:In recent years, with the large-scale construction of high-speed railway in China, it is urgent to build more long-span bridges to cross the river. The prestressed concrete continuous beam bridge has occupied more and more proportion in the railway passenger dedicated line bridge, and the cantilever pouring construction method has also been developed rapidly in recent years. Most of the long-span prestressed concrete continuous beam bridges in China are constructed by this method. The continuous beam bridges have the advantages of small deformation, large stiffness, strong seismic resistance and good driving conditions. Maintenance is simple. Continuous beam bridge is a common structural form in daily life. This design is mainly aimed at the typical representative of continuous beam: prestressed concrete continuous beam bridge. In order to ensure the closing accuracy of the bridge structure, the alignment of the bridge and the elevation required by the design can be achieved after the completion of the bridge line and the operation for a certain time. It is necessary to monitor and monitor the deformation of each part of the bridge structure during the construction process. The construction monitoring of cantilever pouring bridge mainly includes two aspects: the structure alignment and the structural stress. In order to carry out the bridge construction smoothly and reach the design standard, it is necessary to carry out the overall tracking control. Through the analysis model of the bridge structure in the background engineering, the appropriate structural parameters are selected, and all kinds of influencing factors are fully tested, and the calculation, monitoring and prediction are carried out. The continuous harmonic control of the alignment and stress of the bridge has been achieved. At present, although the cantilever symmetrical construction method is relatively mature, However, the high standard requirement of high speed railway puts forward higher requirements for the construction method. This paper introduces in detail the cantilever construction technology of three span continuous beam combined with the construction of Shahe super bridge. The cantilever construction technology of concrete continuous beam beam inside and outside is summarized. Secondly, the construction technology of 0# block in continuous beam cantilever construction, the construction technology of hanging basket and the design of bracket are introduced in combination with the background engineering. Then, the closing technology of the three-span continuous beam bridge is introduced, and the solution of the key technology of the closing section construction is put forward in combination with the background engineering. This paper introduces the construction method and construction monitoring technology of three-span continuous beam bridge based on the background Shahe Bridge's construction of 6010060m continuous beam. The importance of bridge construction control is discussed, and the finite element simulation analysis of the three-span continuous beam bridge is carried out by using the large-scale bridge professional calculation software Midas/civil, and the displacement related to construction monitoring is obtained. The paper expatiates the cantilever construction technology of three-span continuous beam in combination with background engineering. The solution of the key technology in the cantilever construction of three-span continuous beam is given, which plays a guiding role in the construction of the similar bridge type in the future.
【學(xué)位授予單位】：蘭州交通大學(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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本文編號(hào)：1618042