廈深鐵路榕江特大橋主橋施工技術(shù)方案研究
發(fā)布時(shí)間：2018-11-23 18:32
【摘要】：摘要：廈深鐵路榕江特大橋系主跨為(110+2×220+110)m的正交異性鋼橋面鋼桁梁柔性拱橋,跨度在同類型橋梁中居世界首位,結(jié)構(gòu)體系復(fù)雜,本文結(jié)合工程建設(shè)實(shí)際和原鐵道部科研課題,對該橋鋼桁梁柔性拱施工方案、主墩基礎(chǔ)施工、鋼橋面的墊層方案和施工工藝等方面進(jìn)行了研究和總結(jié),主要內(nèi)容如下： (1)對國內(nèi)外同類橋梁結(jié)構(gòu)與施工技術(shù)的歷史變遷、研究現(xiàn)狀和發(fā)展趨勢進(jìn)行了調(diào)研和總結(jié)。 (2)在參考國內(nèi)類似橋梁施工方案的基礎(chǔ)上,結(jié)合榕江特大橋現(xiàn)場水文、地質(zhì)、工期等情況,同時(shí)綜合考慮入�？谕ê揭笠约皹�(gòu)件、節(jié)點(diǎn)運(yùn)輸條件等因素,提出了四個(gè)鋼桁梁柔性拱施工比選方案,并從技術(shù)、工期、資源投入及通航的方便和安全等方面進(jìn)行施工方案比選論證,推薦采用“墩旁托架+雙懸臂對稱拼裝+主跨分次合龍”的施工方案。 (3)基于經(jīng)比選后確定的施工方案,提出了鋼桁梁柔性拱從施工準(zhǔn)備到成橋全過程的施工步驟,并對主梁預(yù)拼場、棧橋、臨時(shí)支墩及支架等臨時(shí)設(shè)施的施工技術(shù)進(jìn)行了研究。 (4)對主橋鋼桁梁懸臂拼裝過程中的最不利工況進(jìn)行了力學(xué)分析與檢算,以確保結(jié)構(gòu)施工過程的安全性。 (5)對該橋主墩的水中測量、深水鉆孔灌注樁基礎(chǔ)、雙壁鋼圍堰施工水中承臺(tái)等方案進(jìn)行了工藝和控制技術(shù)的研究和總結(jié)。 (6)針對正交異性鋼橋面的墊層進(jìn)行了分析和比選,推薦基于CAP高粘著輕質(zhì)防護(hù)墊層及甲基丙烯酸甲酯(MMA)高性能防水涂層的新型橋面墊層結(jié)構(gòu),提出了MMA的施工工藝和質(zhì)量控制措施。 實(shí)踐表明,該橋的施工方法、工藝及控制技術(shù)合理、可靠,可供今后類似橋梁的設(shè)計(jì)與施工借鑒。
[Abstract]:Abstract: the steel truss flexible arch bridge of orthotropic steel deck with the main span of (1102 脳 220110) m is the largest span in the world in the same type of bridge, and the structure system is complex. In this paper, the construction scheme of the steel truss beam flexible arch, the construction of the main pier foundation, the cushion scheme of the steel bridge deck and the construction technology are studied and summarized in combination with the engineering construction practice and the original scientific research project of the Ministry of Railways. The main contents are as follows: (1) the historical changes, research status and development trend of similar bridge structure and construction technology at home and abroad are investigated and summarized. (2) on the basis of referring to the similar bridge construction plan in China, combining the site hydrology, geology, time limit and other factors of the Rong River Bridge, and taking into account the sea entrance navigation requirements as well as the transportation conditions of components and nodes, etc. In this paper, four construction schemes for flexible arch of steel truss beam are put forward and compared with each other in terms of technology, time limit, resource input, convenience and safety of navigation, etc. The construction scheme of "double cantilever symmetrical assembly of main span by piers" is recommended. (3) based on the construction scheme determined by comparison and selection, the construction steps of steel truss beam flexible arch from construction preparation to bridge completion are put forward, and the construction technology of temporary facilities such as main beam pre-assembly yard, trestle bridge, temporary pier and support are studied. (4) in order to ensure the safety of the construction process, the most unfavorable working conditions of the steel truss girder cantilever assembly of the main bridge are analyzed and calculated in order to ensure the safety of the construction process. (5) the technology and control technology of the main pier of the bridge, the deep water bored pile foundation and the construction water cap of the double wall steel cofferdam are studied and summarized. (6) based on the analysis and comparison of the cushion of orthotropic steel bridge deck, it is recommended that a new type of bridge deck cushion structure based on CAP high adhesion lightweight protective cushion and methyl methacrylate (MMA) high performance waterproof coating is recommended. The construction technology and quality control measures of MMA are put forward. The practice shows that the construction method, technology and control technology of the bridge are reasonable and reliable, which can be used for reference in the design and construction of similar bridges in the future.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4
本文編號：2352376
[Abstract]:Abstract: the steel truss flexible arch bridge of orthotropic steel deck with the main span of (1102 脳 220110) m is the largest span in the world in the same type of bridge, and the structure system is complex. In this paper, the construction scheme of the steel truss beam flexible arch, the construction of the main pier foundation, the cushion scheme of the steel bridge deck and the construction technology are studied and summarized in combination with the engineering construction practice and the original scientific research project of the Ministry of Railways. The main contents are as follows: (1) the historical changes, research status and development trend of similar bridge structure and construction technology at home and abroad are investigated and summarized. (2) on the basis of referring to the similar bridge construction plan in China, combining the site hydrology, geology, time limit and other factors of the Rong River Bridge, and taking into account the sea entrance navigation requirements as well as the transportation conditions of components and nodes, etc. In this paper, four construction schemes for flexible arch of steel truss beam are put forward and compared with each other in terms of technology, time limit, resource input, convenience and safety of navigation, etc. The construction scheme of "double cantilever symmetrical assembly of main span by piers" is recommended. (3) based on the construction scheme determined by comparison and selection, the construction steps of steel truss beam flexible arch from construction preparation to bridge completion are put forward, and the construction technology of temporary facilities such as main beam pre-assembly yard, trestle bridge, temporary pier and support are studied. (4) in order to ensure the safety of the construction process, the most unfavorable working conditions of the steel truss girder cantilever assembly of the main bridge are analyzed and calculated in order to ensure the safety of the construction process. (5) the technology and control technology of the main pier of the bridge, the deep water bored pile foundation and the construction water cap of the double wall steel cofferdam are studied and summarized. (6) based on the analysis and comparison of the cushion of orthotropic steel bridge deck, it is recommended that a new type of bridge deck cushion structure based on CAP high adhesion lightweight protective cushion and methyl methacrylate (MMA) high performance waterproof coating is recommended. The construction technology and quality control measures of MMA are put forward. The practice shows that the construction method, technology and control technology of the bridge are reasonable and reliable, which can be used for reference in the design and construction of similar bridges in the future.
【學(xué)位授予單位】：中南大學(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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