本文選題：高速鐵路　切入點(diǎn)：碗扣支架　出處：《天津大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：我國(guó)近些年高速鐵路發(fā)展勢(shì)頭迅猛，經(jīng)過(guò)幾年的不懈努力，目前，中國(guó)在這方面的發(fā)展速度和技術(shù)上都是較為領(lǐng)先的。由于高速鐵路的運(yùn)行速度較快，為了使其平穩(wěn)安全的運(yùn)營(yíng)，線路基礎(chǔ)幾乎全部為高空架設(shè)的混凝土橋，對(duì)于線路上要跨越的河流、道路等有需要采用大跨度的連續(xù)梁橋。對(duì)于鐵路大跨度連續(xù)梁橋的施工方法有許多，但是支架現(xiàn)澆法憑借其施工速度快、整體工期短、規(guī)范化作業(yè)等優(yōu)點(diǎn)，仍然被廣泛的應(yīng)用。但同時(shí)由于在施工過(guò)程中對(duì)各種偶然因素考慮的不周，忽略了施工過(guò)程中監(jiān)控的重要性，，再加上施工質(zhì)量及質(zhì)檢管理體系的不完善，橋梁支架倒塌事件頻發(fā)，造成了很多不必要的人員傷亡和國(guó)家財(cái)產(chǎn)損失，因此，需要對(duì)鐵路現(xiàn)澆梁碗扣支架施工全過(guò)程中的施工監(jiān)控方法和技術(shù)進(jìn)行深入的探討分析，以避免類似事件的重演。 本文以北京至上海新修高速鐵路三標(biāo)段，跨伊家河段的48m+80m+48m現(xiàn)澆梁施工過(guò)程為背景，來(lái)說(shuō)明混凝土現(xiàn)澆梁支架施工的方案設(shè)計(jì)、受力分析、施工監(jiān)控方案設(shè)計(jì)和數(shù)值分析方法等分析流程。 本工程工期較緊，因此選用了滿堂支架法進(jìn)行施工，但是由于跨越的伊家河常年不斷流，同時(shí)京滬高鐵為雙線鐵路，上面的梁體自重較大，貝雷梁承受不了如此重的荷載，因此經(jīng)過(guò)方案必選后采用鋼管樁平臺(tái)基礎(chǔ)來(lái)跨越伊家河段，以此作為碗扣支架的基礎(chǔ)。為了檢驗(yàn)此方案的合理性，并為施工監(jiān)控提供理論數(shù)值，保證工程如期安全的完工，并為以后類似工程提供可借鑒的方案，本文對(duì)碗扣支架和鋼管樁平臺(tái)的各施工階段的受力狀況進(jìn)行了研究和分析，主要工作及研究成果如下： （1）結(jié)合具體工程情況，經(jīng)方案比選后，選用了鋼管樁平臺(tái)基礎(chǔ)和碗扣支架的支撐系統(tǒng)方案進(jìn)行施工，并對(duì)此方案全過(guò)程施工方法進(jìn)行了詳細(xì)的安排； （2）對(duì)支撐體系分別進(jìn)行了受力檢算和數(shù)值模擬分析，得到了各施工工況下的理論數(shù)值，為施工監(jiān)控提供了參考值，并對(duì)支撐體系弱點(diǎn)部位進(jìn)行了標(biāo)示，可參考此方案進(jìn)行體系加固和重點(diǎn)監(jiān)控，以確保施工的安全進(jìn)行； （3）依據(jù)方案和數(shù)值分析結(jié)果，編制了全橋支撐體系的施工監(jiān)控方案，此方案可為以后類似工程的施工提供理論指導(dǎo)。
[Abstract]:In recent years, China's high-speed railway has been developing rapidly. After several years' unremitting efforts, China is now in the leading position in the development and technology of high-speed railway. In order to ensure its smooth and safe operation, the line is based on almost all concrete bridges erected at high altitude. For rivers to be crossed on the line, There are many construction methods for railway long-span continuous beam bridges, but the cast-in-place support method has the advantages of fast construction speed, short overall construction period, standardized operation, etc. It is still widely used. But at the same time, due to the improper consideration of various accidental factors in the construction process, it ignores the importance of monitoring in the construction process, plus the imperfection of the construction quality and quality inspection management system. The frequent collapse of bridge support has caused a lot of unnecessary casualties and national property losses. Therefore, it is necessary to deeply discuss and analyze the construction monitoring methods and techniques during the whole construction of cast-in-place beam and bowl buckle support. To avoid a repetition of similar events. In this paper, based on the construction process of 48m 80m 48m cast-in-place beam in the third section of Beijing-Shanghai new high speed railway and the span of Yinjihe reach, the scheme design and force analysis of concrete cast-in-situ beam support construction are described. Construction monitoring scheme design and numerical analysis methods and other analytical processes. The construction period of the project is relatively tight, so the full hall support method is used to carry out the construction. However, because the Yia River crossing is not cut off all the year round and the Beijing-Shanghai high-speed railway is a double-track railway, the beam above has a larger body weight, so the Beere beam cannot bear such a heavy load. Therefore, the foundation of steel pipe pile platform is adopted to cross the Yijia reach after the project must be selected, which is used as the foundation of the bowl buckle support. In order to test the rationality of this scheme, and to provide the theoretical value for construction monitoring and control, to ensure the completion of the project as scheduled and safely, And for similar projects in the future can be used for reference, this paper research and analysis of the bowl buckle support and steel pipe pile platform of the construction stage of the force situation, the main work and research results are as follows:. 1) combined with the concrete engineering situation, after the scheme comparison and selection, the support system scheme of the steel pipe pile platform foundation and the bowl buckle support is selected to carry on the construction, and the construction method of the whole process of the scheme is arranged in detail; (2) the stress check and numerical simulation analysis of the bracing system are carried out, and the theoretical values under various construction conditions are obtained, which provide the reference value for construction monitoring and control, and mark the weak parts of the bracing system. We can refer to this scheme for system strengthening and key monitoring to ensure the safety of construction. According to the scheme and numerical analysis results, the construction monitoring scheme of the whole bridge bracing system is worked out, which can provide theoretical guidance for the construction of similar projects in the future.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 管松;;鋼管樁打拔樁施工研究[J];工程與建設(shè);2006年05期

2 鄒立華;一座多跨預(yù)應(yīng)力混凝土連續(xù)梁橋的施工過(guò)程分析[J];公路交通科技;2004年01期

3 趙兵;;現(xiàn)澆混凝土連續(xù)箱梁支架預(yù)壓技術(shù)探討[J];公路交通技術(shù);2008年02期

4 徐漢勇;楊俊杰;;橫向支撐剛度對(duì)軸心受壓鋼管穩(wěn)定的影響[J];工業(yè)建筑;2006年10期

5 梅源;胡長(zhǎng)明;周正永;蔣明;王霞;;高大模板支撐體系在結(jié)構(gòu)施工期內(nèi)所受荷載統(tǒng)計(jì)分析[J];工業(yè)建筑;2010年02期

6 于清緣;陳立中;;借鑒國(guó)外發(fā)展經(jīng)驗(yàn) 減少我國(guó)腳手架工程事故[J];工業(yè)建筑;2011年01期

7 丁良龍;曠新輝;喬春柳;張婷;曾祥能;;庫(kù)區(qū)深水墩鋼管樁平臺(tái)浮法施工技術(shù)[J];世界橋梁;2012年05期

8 王孝平,何建棟;潤(rùn)揚(yáng)長(zhǎng)江大橋跨滬寧鐵路現(xiàn)澆梁支架施工技術(shù)[J];世界橋梁;2005年01期

9 熊敬剛;滿堂支架現(xiàn)澆梁地基處理——混凝土預(yù)制板法[J];世界橋梁;2002年03期

10 富恩久,吳村,黃榮輝,王常洪,謝曉明,謝丹,范亞君;混凝土養(yǎng)護(hù)方法的選擇[J];混凝土;2005年04期

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