【摘要】：多跨、大聯長預應力混凝土連續剛構橋不僅適應了高等級公路較高的路線指標、各種復雜的地形地質條件，而且保持了行車舒適、穩定定好、跨越能力強、施工技術成熟、造價經濟等優點。因此跨徑在100~200m范圍，與其他橋型相比優勢較為明顯。但隨著聯長與跨數的增加，邊墩處于極為不利的受力狀態，且不同的合龍方式對結構受力及工期均有一定影響，因此多跨連續剛構橋的合龍方案及改善邊墩受力狀態的工程措施研究顯得尤為重要。 本文以延安至延川高速公路上跨越黃河的連續剛構橋為依托，分析研究多跨大聯長連續剛構橋的橋墩設計驗算及主梁合龍方案，主要研究內容和成果有： 1.依據依托工程，建立該橋各階段模型，計算分析上下部結構受力狀況，得出橋墩截面型式及尺寸選擇的方法。 2.分析研究了影響橋墩受力的各種因素，得出不同位置墩身設計的控制因素。 3.討論改善多跨連續剛構橋邊墩受力的構造及施工措施，研究確定合龍頂推力與頂推位移的關系，得出確定頂推力大小的方法。 4.針對黃河特大橋，，提出采用邊、中跨次邊跨的合龍順序要優于邊跨次邊跨 中跨及中跨次邊跨邊跨，此順序更有利于次邊跨與中跨合龍之前的頂推，且邊、中跨同時合龍可縮短工期。
[Abstract]:Multi-span, large-span prestressed concrete continuous rigid frame bridge not only adapts to the higher route index of high-grade highway, various complicated terrain and geological conditions, but also maintains comfortable driving, stable determination, strong span ability and mature construction technology. Cost economy and other advantages. Therefore, the span is in the range of 100 ~ 200 m, compared with other bridge type, the advantage is obvious. However, with the increase of joint length and span number, the side pier is in an extremely unfavorable stress state, and the different closing modes have certain influence on the stress of the structure and the duration of the project. Therefore, it is very important to study the closed scheme of multi-span continuous rigid frame bridge and the engineering measures to improve the stress state of side pier. Based on the continuous rigid frame bridge across the Yellow River on the Yanan-Yanchuan Expressway, this paper analyzes and studies the design and calculation of the piers of the multi-span long-span continuous rigid frame bridge and the scheme of closing the main beam. The main research contents and results are as follows: 1. According to the supporting project, the model of each stage of the bridge is established, and the stress condition of the upper and lower parts of the bridge is calculated and analyzed, and the method of selecting the section type and the size of the pier is obtained. 2. The factors influencing the force of pier are analyzed and studied, and the control factors of pier design in different positions are obtained. 3. This paper discusses the construction and construction measures to improve the force on the side pier of multi-span continuous rigid frame bridge, studies the relationship between the top thrust of the closure and the displacement of the thrust, and obtains the method of determining the force of the top thrust. 4. In view of the Yellow River bridge, it is suggested that the closing sequence of edge, middle span and middle span is better than that of side span, middle span and middle span, and this order is more favorable to the pushing of secondary span and middle span before closing dragon, and the side is better than that of side span, middle span and middle span, and this order is more favorable to the pushing of secondary span and middle span. Closing the middle span at the same time can shorten the duration of the project.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4

【參考文獻】

相關期刊論文 前10條

1 鄒毅松;單榮相;;連續剛構橋合龍頂推力的確定[J];重慶交通學院學報;2006年02期

2 何柏雷;“太陽把橋曬跑了?”——深圳市某立交A匝道橋事故分析[J];城市道橋與防洪;2002年02期

3 鐘正強,陳常松,顏東煌;連續梁橋合龍方案對施工控制的影響[J];長沙交通學院學報;2002年03期

4 韓艷;陳政清;李開言;;在ANSYS中實現雙肢薄壁橋墩參數優化設計的方法[J];鐵道科學與工程學報;2005年06期

5 葉見曙,賈琳,錢培舒;混凝土箱梁溫度分布觀測與研究[J];東南大學學報(自然科學版);2002年05期

6 康為江,方志,鄒銀生;鋼筋混凝土連續箱梁日照溫差應力的試驗研究[J];湖南交通科技;2001年01期

7 吳彪;矮墩連續剛構橋合攏段的頂推施工[J];公路;2004年07期

8 徐君蘭,顧安邦;連續剛構橋主墩剛度合理性的探討[J];公路交通科技;2005年02期

9 歐明星;預應力混凝土連續剛構橋設計要領[J];國外公路;1994年01期

10 冷雙全;張永水;;高墩多跨連續剛構橋最優合龍順序選擇[J];交通科學與工程;2012年03期

本文編號：2359355