本文選題：剛構(gòu)連續(xù)組合梁橋 + 施工控制��； 參考：《長沙理工大學(xué)》2014年碩士論文

【摘要】：隨著連續(xù)梁橋結(jié)構(gòu)體系的增多,橋梁跨越能力的不斷提高,施工材料、機械、設(shè)備、技術(shù)等的不斷更新與改進(jìn),我國的連續(xù)梁橋建設(shè)發(fā)展迅速。其中,剛構(gòu)連續(xù)組合梁橋這種橋型,不僅在于綜合了連續(xù)梁橋和連續(xù)剛構(gòu)橋各自的優(yōu)勢,因受力介于連續(xù)梁橋和連續(xù)剛構(gòu)橋之間,既可以增加橋梁跨徑又能夠適應(yīng)矮墩等環(huán)境的限制等因素,受到了廣泛的關(guān)注與應(yīng)用。組合梁橋上部結(jié)構(gòu)箱梁采用的是懸臂施工工藝,其施工難度大、施工節(jié)段多,周期長而且工藝復(fù)雜。我們必須施行嚴(yán)格的施工控制,確保橋梁上部結(jié)構(gòu)在施工過程中,其內(nèi)力和變形始終處于安全的范圍內(nèi),且成橋后的線形、結(jié)構(gòu)的受力狀態(tài)接近設(shè)計期望。本文以湖南湘西自治州鳳凰堤溪沱江大橋(重建)工程為工程背景,回顧該種橋型的發(fā)展歷史和施工控制理論,運用BRanalysis和橋梁博士建立組合梁橋空間模型進(jìn)行仿真分析,復(fù)核設(shè)計計算所確定的成橋狀態(tài)和施工狀態(tài),并提出如下幾點研究內(nèi)容：1、以鳳凰沱江大橋(重建)工程的實際狀況為背景,就施工監(jiān)控的基本控制理論、方法做詳細(xì)介紹,并對其影響因素進(jìn)行分析；2、沱江大橋3#橋墩采用的是擴(kuò)大基礎(chǔ),其他橋墩均采用樁基礎(chǔ),為確保施工安全,對擴(kuò)大基礎(chǔ)的穩(wěn)定性進(jìn)行系統(tǒng)的驗算,并分析其設(shè)計的合理性；3、以沱江大橋為背景,建立有限元模型。懸臂施工中,施工監(jiān)控重點監(jiān)控主梁的線形和內(nèi)力,在對比理論計算值與現(xiàn)場實測值的基礎(chǔ)上分析主梁在收縮徐變、澆筑、張拉等典型工況下?lián)隙扰c應(yīng)力的變化規(guī)律；4、因各方面的原因,沱江大橋次邊跨合龍前已經(jīng)拆除了1#墩的臨時固結(jié),且施工了一部分的人行道板,對施工控制工作帶來了很大難度。針對沱江大橋的實際施工情況,考慮橋梁的安全、線形、結(jié)構(gòu)內(nèi)力等因素,分析最合適的拆除臨時固結(jié)時間和合龍方案。
[Abstract]:With the increasing of continuous beam bridge structure system, the continuous improvement of bridge span capacity, the continuous renewal and improvement of construction materials, machinery, equipment and technology, the construction of continuous beam bridge in China is developing rapidly. Among them, rigid frame continuous composite beam bridge not only combines the advantages of continuous beam bridge and continuous rigid frame bridge, but also has the force between continuous beam bridge and continuous rigid frame bridge. It can not only increase the span of bridges but also adapt to the environmental constraints such as short piers, and has been widely concerned and applied. The superstructure box girder of composite girder bridge adopts cantilever construction technology, which is difficult to construct, has many construction sections, long period and complex technology. We must carry out strict construction control to ensure that the internal force and deformation of the superstructure of the bridge are always in the safe range during the construction process, and the line shape after the completion of the bridge, the stress state of the structure is close to the design expectation. Based on the project of Fenghuangdixi Tuojiang River Bridge in Xiangxi Autonomous Prefecture of Hunan Province, this paper reviews the development history and construction control theory of this type of bridge, and establishes the spatial model of composite beam bridge by using BRanalysis and the bridge doctor to carry out simulation analysis. Reviewing the bridge status and construction state determined by design calculation, and putting forward the following research contents: 1. Based on the actual situation of Phoenix Tuojiang Bridge (reconstruction) project, the basic control theory and method of construction monitoring are introduced in detail. In order to ensure the safety of construction, the stability of the enlarged foundation is systematically checked and calculated, and the pier of Tuojiang Bridge is based on the enlarged foundation, while the other piers are based on the pile foundation. The rationality of the design is analyzed and the finite element model is established based on the Tuojiang Bridge. In cantilever construction, the main beam is monitored and monitored by construction supervision and control. On the basis of comparing the calculated value of theory with the measured value on the spot, the shrinkage, creep and pouring of main beam are analyzed. For various reasons, the temporary consolidation of the pier of Tuojiang Bridge has been removed before the closure of the secondary side span of the Tuojiang Bridge, and a part of the sidewalk slab has been constructed. It brings great difficulty to the construction control work. In view of the actual construction of Tuojiang Bridge, considering the safety, alignment and internal force of the bridge, the most suitable temporary consolidation time and closure scheme are analyzed.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李國平,史建偉,張耿耿,伍耀;上海吳淞大橋結(jié)構(gòu)狀態(tài)施工控制技術(shù)[J];華東公路;1994年02期

，

本文編號：1978927