【摘要】：近年來,移動(dòng)模架法因具有工序程序化、施工周期短、線形易于控制、適用范圍廣和施工交通影響小等優(yōu)點(diǎn),在眾多橋梁施工方法中脫穎而出。但55m及其以上跨徑的移動(dòng)模架的施工技術(shù)研究尚不深入。本文以洞庭湖大橋?yàn)┑匾龢?3標(biāo)段帶吊梁的MSS55移動(dòng)模架造橋機(jī)機(jī)械為研究對(duì)象,在總結(jié)已有成果與研究存在的問題的基礎(chǔ)上,根據(jù)帶吊梁的MSS55型移動(dòng)模架在實(shí)際施工中的經(jīng)驗(yàn),對(duì)其施工技術(shù)進(jìn)行了比較詳細(xì)的分析和研究,取得了若干有價(jià)值的結(jié)論:1、運(yùn)用有限元程序MIDAS FEA對(duì)帶吊梁的MSS55型移動(dòng)模架結(jié)構(gòu)進(jìn)行了理論計(jì)算,研究了該移動(dòng)模架整體安全性和穩(wěn)定性;運(yùn)用FBR_CAL_SUO對(duì)移動(dòng)模架施工的連續(xù)梁全過程進(jìn)行模擬,得到了施工過程中關(guān)鍵工況的撓度和應(yīng)力的理論值;2、編制試驗(yàn)方案并進(jìn)行了預(yù)壓試驗(yàn),采集了現(xiàn)場(chǎng)預(yù)壓試驗(yàn)關(guān)鍵控制截面的應(yīng)力和撓度數(shù)據(jù),分析得到模架在承受不同試驗(yàn)荷載的變形和應(yīng)力變化規(guī)律。對(duì)預(yù)壓實(shí)驗(yàn)測(cè)試數(shù)據(jù)和運(yùn)用FBR_CAL_SUO得到的理論計(jì)算數(shù)據(jù)進(jìn)行對(duì)比,驗(yàn)證移動(dòng)模架的安全性;3、用移動(dòng)模架施工連續(xù)梁的澆筑、張拉預(yù)應(yīng)力和落模三個(gè)關(guān)鍵控制工況各監(jiān)測(cè)截面的撓度實(shí)測(cè)值和基于FBR_CAL_SUO軟件得到的理論計(jì)算值進(jìn)行對(duì)比分析,修正結(jié)構(gòu)參數(shù),進(jìn)行修正后的全過程分析得到合理的預(yù)拱度;4、研究移動(dòng)模架法的特點(diǎn),提出帶吊梁的MSS55型移動(dòng)模架施工的各項(xiàng)安全保證措施,以表格的形式給出了日常檢查維護(hù)的詳細(xì)要求,為其日常使用養(yǎng)護(hù)與維修、正常安全施工提供依據(jù)。
[Abstract]:In recent years, because of the advantages of procedure, short construction period, easy control of linear shape, wide application range and small traffic impact, the moving mould frame method stands out among many bridge construction methods. However, the construction technology of moving die frame with span of 55 m and above is not well studied. In this paper, the MSS55 moving mould construction machine with suspended beam in the 13th section of the beachway approach bridge of Dongting Lake Bridge is taken as the research object. On the basis of summing up the existing achievements and the existing problems, according to the practical construction experience of the MSS55 type moving mould frame with suspension beam, The construction technology is analyzed and studied in detail, and some valuable conclusions are obtained. The finite element program MIDAS FEA is used to calculate the structure of MSS55 type moving die frame with suspension beam. The whole safety and stability of the movable die frame are studied, and the whole process of continuous beam construction is simulated by FBR_CAL_SUO. The theoretical values of deflection and stress in key working conditions are obtained, the test scheme is compiled and preloading test is carried out, and the stress and deflection data of key control section of field preloading test are collected. The deformation and stress variation of the die frame under different test loads are obtained. By comparing the test data of preloading experiment with the theoretical calculation data obtained by FBR_CAL_SUO, the safety of the movable die frame is verified and the continuous beam is built with the moving die frame. The deflection measured values of each monitoring section under three key control conditions of tensioning prestress and falling formwork are compared and analyzed with the theoretical calculated values based on FBR_CAL_SUO software, and the structural parameters are corrected. A reasonable pre-arch is obtained by analyzing the whole process of the modification. The characteristics of the moving die frame method are studied, and the safety assurance measures for the construction of the MSS55 type movable die frame with suspended beam are put forward, and the detailed requirements for routine inspection and maintenance are given in the form of a table. For its daily use, maintenance and maintenance, normal safety construction to provide the basis.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.463

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