本文選題：懸拼拱形拱架 + 施工控制��； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：拱橋懸拼拱形拱架施工法因其工藝成熟、適應(yīng)復(fù)雜地形能力強,在我國西南地區(qū)的橋梁建設(shè)中得到廣泛應(yīng)用。本文以貴州省黔中水利樞紐祠堂邊渡槽為研究對象,就懸拼拱形拱架現(xiàn)澆拱橋施工控制若干關(guān)鍵問題展開相關(guān)研究,主要有以下幾個方面:①闡述了懸拼拱形拱架現(xiàn)澆拱橋的施工特點,對施工控制關(guān)鍵步驟進行計算,確定了扣索的索力值,優(yōu)化了拱圈分段澆筑程序。②以本橋使用的貝雷拱架為背景,對拱圈—拱架聯(lián)合作用問題進行了分析研究,通過計算發(fā)現(xiàn),拱架承擔(dān)的混凝土總重量占52%左右,拱圈承擔(dān)的混凝土總重量占48%左右。③以本橋使用的拱形拱架為背景,分析了不同平豎聯(lián)的布置方式和拱腳約束方式對拱架穩(wěn)定性能的影響。通過研究發(fā)現(xiàn),局部加強上弦桿件的平聯(lián)以及L/4和3L/4段的平聯(lián),可以更好的增大拱架穩(wěn)定性;拱架拱腳固結(jié)的穩(wěn)定性比拱腳鉸接的穩(wěn)定性要大50%左右。④通過祠堂邊渡槽主要施工步驟的施工監(jiān)測成果與理論值的對比,表明拱架在施工過程中線形偏差小,應(yīng)力分布均勻,結(jié)構(gòu)安全穩(wěn)定,進而證明本文對祠堂邊渡槽采用的監(jiān)控方法是合理有效的。
[Abstract]:The construction method of arch bridge cantilever arch frame is widely used in the construction of bridges in southwest China because of its mature technology and strong ability to adapt to complex terrain. In this paper, some key problems of construction control of cast-in-place arch bridge with cantilever arch frame are studied, taking the aqueduct of ancestral hall side of Guizhou central water conservancy project as the research object. The main aspects are as follows: 1. The construction characteristics of cast-in-place arch bridge with cantilever arch frame are expounded, the key steps of construction control are calculated, and the cable force value of cable buckling is determined. Based on the Beere arch frame used in this bridge, the combined action of arch ring and arch frame is analyzed and studied. Through calculation, it is found that the total concrete weight of arch frame is about 52%. The concrete bearing total weight of arch ring is about 48.3%. Based on the arch frame used in this bridge, the influence of different horizontal and vertical arrangement and arch foot restraint mode on the stability of arch frame is analyzed. It is found that the stability of the arch can be improved by the horizontal connection of the locally strengthened upper chord and the flat connection of the L / 4 and 3L / 4 segments. The stability of arch foot consolidation is about 50% greater than that of arch foot hinge. 4 through the comparison of construction monitoring results and theoretical values of the main construction steps of the aqueduct beside the ancestral hall, it is shown that the arch frame has less linear deviation and uniform stress distribution in the construction process. The structure is safe and stable, which proves that the monitoring method used in this paper is reasonable and effective.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U445.4;U448.22

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本文編號：2034525