【摘要】：安全是鐵路永恒不變的主題,特別是高速鐵路,由于運(yùn)行速度快等特點(diǎn),對線路條件要求極高。但當(dāng)今鐵路橋梁橋墩差異沉降的問題嚴(yán)重地影響了高速鐵路的行車安全,是亟需解決的重要技術(shù)問題之一。本論文依托京津城際CRTSⅡ型無砟軌道鐵路橋梁沉降修復(fù)工程,通過對橋梁及橋上無砟軌道結(jié)構(gòu)進(jìn)行理論、實(shí)踐相結(jié)合的研究分析,驗(yàn)證了鐵路橋梁沉降后頂升修復(fù)的可行性和必要性,為以后沉降橋梁頂升修復(fù)工作奠定了一定的基礎(chǔ)。所做的主要工作如下:(1)在查閱大量國內(nèi)外文獻(xiàn)資料的基礎(chǔ)上,總結(jié)了國內(nèi)外鐵路橋梁、無砟軌道結(jié)構(gòu)以及橋梁沉降方面的基本概況,介紹了橋梁頂升研究現(xiàn)狀。(2)運(yùn)用有限元軟件ANSYS進(jìn)行了橋梁及無砟軌道結(jié)構(gòu)的模擬計算分析,得出在不同梁型及不同頂升工況的前提下,鐵路橋梁無砟軌道系統(tǒng)頂升施工時的應(yīng)力分布情況和最不利施工位置。(3)在橋梁沉降修復(fù)施工過程中進(jìn)行實(shí)時監(jiān)測,并在施工結(jié)束后對監(jiān)測數(shù)據(jù)進(jìn)行整理、分析和總結(jié),得出橋梁在實(shí)際頂升修復(fù)過程中結(jié)構(gòu)的受力變化情況,與數(shù)值模擬分析結(jié)果做對比分析。(4)對鐵路橋梁沉降進(jìn)行長期監(jiān)測,通過數(shù)據(jù)分析得出橋梁的沉降情況,整理歸納出沉降現(xiàn)狀,為之后頂升施工提供參考和依據(jù)。
[Abstract]:Safety is the constant theme of railway, especially the high-speed railway, because of its fast running speed and so on, it requires extremely high line conditions. However, the problem of differential settlement of railway bridge piers seriously affects the running safety of high-speed railway, and it is one of the important technical problems urgently to be solved. This paper relies on the Beijing-Tianjin intercity CRTSII ballastless track bridge settlement repair project, through the bridge and the ballastless track structure on the bridge theory, the practice of the combination of research and analysis, The feasibility and necessity of lifting repair of railway bridge after settlement has been verified, which has laid a certain foundation for the future work of lifting repair of railway bridge. The main work done is as follows: (1) on the basis of consulting a large number of domestic and foreign literature, the basic situation of domestic and foreign railway bridges, ballastless track structures and bridge settlement is summarized. The research status of bridge jacking is introduced. (2) the simulation calculation and analysis of bridge and ballastless track structure are carried out by using finite element software ANSYS, and it is concluded that under the premise of different beam types and different lifting conditions, the structure of bridge and ballastless track is simulated and analyzed. The stress distribution and the most unfavorable construction position of the ballastless track system of railway bridge during the lifting construction. (3) Real-time monitoring in the process of bridge settlement repair construction, and the arrangement, analysis and summary of the monitoring data after the completion of the construction. The stress variation of the bridge in the process of actual lifting repair is obtained and compared with the results of numerical simulation analysis. (4) the long-term monitoring of railway bridge settlement is carried out, and the settlement of the bridge is obtained through data analysis. In order to provide reference and basis for subsequent lifting construction, the settlement situation is summarized.
【學(xué)位授予單位】：中國鐵道科學(xué)研究院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U443.1;U213.244

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 安彥坤;橋梁沉降對岔區(qū)無砟軌道結(jié)構(gòu)力學(xué)特性的影響研究[D];北京交通大學(xué);2012年

，

本文編號：2436402