本文選題：支架現(xiàn)澆 + 結(jié)構(gòu)失穩(wěn)��； 參考：《安徽理工大學(xué)》2014年碩士論文

【摘要】：隨著現(xiàn)代橋梁施工技術(shù)的不斷的發(fā)展,箱梁澆筑的施工技術(shù)也有了很大進(jìn)步。支架澆筑法在箱梁施工中是一種較為成熟的箱梁澆筑施工方法,其具有施工方便,技術(shù)簡單,適用性廣,無需預(yù)制場地等的優(yōu)點,使它不僅是城市橋梁施工的一種主要方法,也是山區(qū)橋梁箱梁澆筑施工中的首選方法。 支架現(xiàn)澆施工技術(shù)目前在山區(qū)橋梁工程中大量采用,但是在施工中關(guān)于支架結(jié)構(gòu)驗算方面缺乏權(quán)威性規(guī)范規(guī)定,因此如何在實際施工中尋找一種簡便可靠且符合實際工程特點的驗算方法成為了現(xiàn)在支架現(xiàn)澆施工技術(shù)研究重要方向,本文就在此問題上做了相應(yīng)的研究,得到了如下結(jié)論。 首先,論文較為詳細(xì)地介紹了支架的結(jié)構(gòu)穩(wěn)定性和臨界荷載研究方法,闡述了結(jié)構(gòu)的失穩(wěn)類型和研究結(jié)構(gòu)失穩(wěn)的結(jié)構(gòu)臨界荷載靜力法、能量法以及有限元在結(jié)構(gòu)穩(wěn)定性中的應(yīng)用。據(jù)此,針對山區(qū)橋梁特點進(jìn)行了應(yīng)用分析,提出了支架設(shè)計的具體內(nèi)容和山區(qū)支架施工中需要采取的安全技術(shù)措施。 其次,論文依皖南山區(qū)的麻鴨跨高鐵大橋為例,針對麻鴨跨高鐵大橋自身的工程及環(huán)境特點,研究了支架現(xiàn)澆中的地基處理和支架預(yù)壓的可能出現(xiàn)的問題,提出了相應(yīng)的處理措施。采用荷載極限破壞法對支架和模板的剛度,承載力和穩(wěn)定性進(jìn)行了相應(yīng)的驗算,以此來驗證支架設(shè)計的合理性。 最后,在支架各種驗算的基礎(chǔ)上,提出了完整的支架現(xiàn)澆施工方案,包括地基處理,支架預(yù)壓,支架搭設(shè),混凝土澆筑,預(yù)應(yīng)力張拉,支架拆除等,并附帶制定了相應(yīng)施工的安全措施。 論文研究成果為對以后類似的橋梁工程提供了有益的參考。
[Abstract]:With the development of modern bridge construction technology development, construction technology of box girder has made great progress. Pouring construction method of girder support is a kind of mature box in box girder, which has the advantages of convenient construction, simple technology, wide applicability, the advantages of no prefabrication and so, so it is not only a main method of city bridge construction, the mountain is also the preferred method of bridge box girder construction.
Construction technology of cast-in-place scaffold uses a lot of current in the mountainous area in bridge engineering, but in the construction of the lack of authoritative provisions regulate the checking computation of supporting structure, so the calculation method of how to find a simple and reliable and practical engineering characteristics in actual construction has become an important research direction in the construction technology of cast-in-place bracket, the corresponding research on this issue, the conclusions are as follows.
First, this paper describes in detail the structure stability of supports and the critical load of research methods, expounds the structure of the instability type and study method of static structure structure losing steady critical loads, and the application of finite element method in the stability of the energy structure. Accordingly, according to the characteristics of bridge in mountainous areas of the security technology the specific contents and measures should be taken in support construction in stent design.
Secondly, according to the Anhui Nanshan District duck cross rail bridge as an example, the duck across the high iron bridge engineering and its environmental characteristics, research support cast-in-place in ground treatment and support preloading the possible problems and puts forward some corresponding measures. The ultimate failure load method of scaffold and template the stiffness, bearing capacity and stability of the corresponding calculation, in order to verify the rationality of stent design.
Finally, on the basis of various checking computations of brackets, a complete scaffolding cast in place construction scheme is put forward, including foundation treatment, bracket preloading, support erection, concrete placement, prestress stretching, and support dismantling.
The research results of this paper provide useful reference for similar bridge engineering in the future.

【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4

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本文編號：1770679