本文選題：大跨徑連續(xù)梁橋　切入點：鋼斜撐　出處：《浙江工業(yè)大學》2014年碩士論文　論文類型：學位論文

【摘要】：頂推施工法具有占用橋下通道少、施工設備比較簡單、作業(yè)機械化程度高、費用投入低、工程質(zhì)量穩(wěn)定、施工安全可靠等特點,已經(jīng)成為中小跨連續(xù)梁橋的主要施工方法之一。論文研究目的是將成熟的中小跨徑連續(xù)梁橋頂推技術(shù)推廣到大跨徑連續(xù)梁橋中,而且無需設置跨中臨時墩,使其能適應通航孔的施工,從而促進橋梁施工技術(shù)的發(fā)展。論文首先,對當前連續(xù)梁橋施工技術(shù)存在的問題和頂推技術(shù)在通航孔連續(xù)梁中推廣難的原因進行了分析,并提出了在橋墩上設置鋼斜撐來取代跨中河道內(nèi)搭建臨時墩的方法,以進一步縮短頂推跨徑。其次,以江西省南昌市洪都大橋北主橋輔通航孔5×64m的預應力混凝土連續(xù)等截面箱梁橋施工為背景,開展了鋼斜撐頂推方案的結(jié)構(gòu)設計和施工工藝研究,同時進行了施工和成橋階段詳細的結(jié)構(gòu)計算分析,并論證了此方案的可行性。最后,對該橋分別采用頂推施工法和懸臂澆筑法,進行了兩種方案的技術(shù)和經(jīng)濟對比分析。論文研究結(jié)果表明：大跨徑預應力混凝土連續(xù)梁橋中采用無跨中臨時墩的頂推施工技術(shù)是可行的,而且比當前較常用的懸臂澆筑施工技術(shù)在施工質(zhì)量、安全、進度及成本控制等方面的綜合表現(xiàn)具有更好的實用性和先進性,可以在大跨徑預應力混凝土連續(xù)等截面箱梁橋施工中推廣應用。
[Abstract]:The push-push construction method has the characteristics of less occupied channels under the bridge, simple construction equipment, high degree of mechanization, low cost, stable engineering quality, safe and reliable construction, etc. It has become one of the main construction methods of small and medium span continuous beam bridge. The purpose of this paper is to extend the mature pushing technology of medium and small span continuous beam bridge to long span continuous beam bridge, and it is not necessary to set temporary pier in middle span. So that it can adapt to the construction of navigation holes, thus promoting the development of bridge construction technology. First of all, the paper analyzes the problems existing in the construction technology of continuous beam bridges and the reasons why it is difficult to popularize the technology of jacking and pushing in continuous beams of navigation holes. And put forward the method of installing steel inclined brace on the pier to replace the temporary pier in the middle span channel, so as to further shorten the jacking and pushing span. Secondly, Based on the construction of prestressed concrete continuous box girder bridge with auxiliary navigation hole of 5 脳 64m in the north main bridge of Hongdu Bridge, Nanchang City, Jiangxi Province, the structural design and construction technology of steel inclined brace jacking scheme are studied. At the same time, the detailed structural calculation and analysis of the construction and the completion of the bridge are carried out, and the feasibility of the scheme is demonstrated. Finally, the jacking construction method and the cantilever pouring method are used respectively for the bridge. The technical and economic comparison and analysis of the two schemes are carried out. The results of the paper show that it is feasible to use the non-span temporary pier in the construction of the long-span prestressed concrete continuous beam bridge. Moreover, it is more practical and advanced than the cantilever pouring construction technology in the aspects of construction quality, safety, schedule and cost control. It can be widely used in the construction of long span prestressed concrete continuous box girder bridge with equal section.
【學位授予單位】：浙江工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4

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本文編號：1594571