本文選題：預應力連續(xù)梁 + 懸臂掛籃施工　； 參考：《山東大學》2015年碩士論文

【摘要】：隨著國民經濟的發(fā)展,人民生活水平的提高,對高速公路的需求逐年增加,高速立交橋就不可避免地出現,極大緩解了城市交通的壓力。預應力混凝土連續(xù)梁橋以結構受力性能好、變形小、伸縮縫少、行車平順舒適、造型簡潔美觀、養(yǎng)護工程量小、抗震能力強等優(yōu)勢,在跨度100-200m的橋梁中最具競爭力。大跨度連續(xù)梁橋多采用懸臂施工工藝,施工過程復雜,影響因素多,成橋狀態(tài)偏離設計要求的狀況時有發(fā)生。為確保橋梁良好的線形和合理的受力狀態(tài),橋梁的施工控制必不可少。本文以某跨高速公路分離立交橋為工程背景,介紹了某跨高速分離立交橋施工監(jiān)控的方案；介紹了懸臂掛籃施工過程中的基本理論；建立了大橋有限元結構計算模型,并進行了施工階段結構分析,有效掌握了大橋各施工階段的應力和變形狀態(tài),為大橋的施工控制提供了可靠的理論依據。本文對施工控制過程中線形的控制進行了重點探討,根據分離立交橋的工程實際施工進度、箱梁高程變化、混凝土養(yǎng)護時間、施工溫度等對實測數據進行修正,在其中考慮了材料參數、施工溫度等影響因素。通過高程和應力實際觀測值與理論值的比較,研究表明,某跨高速分離立交橋施工控制采用的MIDAS CIVIL有限元仿真模型有效可行,大橋成橋后高程和應力狀態(tài)滿足設計要求,橋梁線形流暢美觀,施工監(jiān)控的任務得以圓滿完成。
[Abstract]:With the development of national economy and the improvement of people's living standard, the demand for expressway is increasing year by year, and the expressway overpass will inevitably appear, which greatly alleviates the pressure of urban traffic. Prestressed concrete continuous beam bridge has the advantages of good mechanical performance, small deformation, less expansion joints, smooth driving, simple and beautiful shape, small maintenance, strong seismic capacity, and so on. It is the most competitive in the span of 100-200m bridge. The cantilever construction technology is often used in long-span continuous beam bridges. The construction process is complex and the influence factors are many. The state of the bridge deviates from the design requirements. In order to ensure the good alignment and reasonable stress state of the bridge, the construction control of the bridge is essential. In this paper, based on the engineering background of a separated overpass of a cross-highway, the construction monitoring scheme of a cross-high speed separation overpass is introduced, the basic theory of cantilever hanging basket construction is introduced, and the finite element structure calculation model of the bridge is established. The structure of the bridge in construction stage is analyzed, and the stress and deformation state of each construction stage of the bridge is effectively grasped, which provides a reliable theoretical basis for the construction control of the bridge. In this paper, the linear control in the construction control process is discussed emphatically. According to the actual construction progress of the separated overpass, the change of box girder height, the curing time of concrete, the construction temperature, etc., the measured data are corrected. In which the material parameters, construction temperature and other factors are considered. By comparing the actual observation values of elevation and stress with the theoretical values, the results show that the Midas CIVIL finite element simulation model used in the construction control of a span high speed separation overpass is effective and feasible, and the height and stress state of the bridge after completion meet the design requirements. The line shape of the bridge is smooth and beautiful, and the task of construction monitoring has been successfully completed.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U445.4

【引證文獻】

相關會議論文 前1條

1 馮志剛;;異型斜跨下承式鋼結構懸索拱橋吊索應力監(jiān)測[A];2013年12月建筑科技與管理學術交流會論文集[C];2013年

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本文編號：2028992