發(fā)布時(shí)間：2018-11-27 11:30

【摘要】：隨著國(guó)家加大對(duì)中西部基礎(chǔ)設(shè)施建設(shè)的投入,越來(lái)越多的大跨徑橋梁在我國(guó)大地拔地而起。但是跨徑的增加也會(huì)給橋梁的設(shè)計(jì)和施工帶來(lái)難度,如主梁和索塔壓應(yīng)力過(guò)高,施工中標(biāo)高難以控制以及箱梁撓度過(guò)大等問(wèn)題。同時(shí),施工階段結(jié)構(gòu)的變形、截面的應(yīng)力狀態(tài)是不斷變化的,這對(duì)施工質(zhì)量和施工安全是不利的,而且直接影響到成橋線形與成橋的受力狀態(tài),因此,對(duì)大跨徑預(yù)應(yīng)力混凝土斜拉橋來(lái)說(shuō),進(jìn)行橋梁線形控制很重要。本文從預(yù)應(yīng)力混凝土斜拉橋的施工控制研究的全面性進(jìn)行考慮,簡(jiǎn)單介紹了預(yù)應(yīng)力混凝土斜拉橋的發(fā)展?fàn)顩r、結(jié)構(gòu)構(gòu)造特點(diǎn)、國(guó)內(nèi)外施工控制研究的發(fā)展的重要性。進(jìn)一步介紹了橋梁施工控制的目的、橋梁施工線形控制的方法及影響橋梁施工線形控制的因素。以安徽省淮南市淮上淮河大橋主梁懸臂現(xiàn)澆施工監(jiān)控的工程案例為背景,詳細(xì)的闡述了淮上淮河大橋施工控制的內(nèi)容、一般理論和方法。其中重點(diǎn)介紹淮上淮河大橋在懸臂施工過(guò)程中線形控制在施工控制中施工階段、控制節(jié)點(diǎn)、控制內(nèi)容,包括混凝土澆筑前后、預(yù)應(yīng)力張拉前后、主橋掛索、合攏順序、臨時(shí)支撐拆除、調(diào)索對(duì)橋梁線形的影響,同時(shí)也詳細(xì)的敘述了主塔、墩、主橋線形控制的具體監(jiān)控工藝,敘述了應(yīng)力效應(yīng)、溫度效應(yīng)和掛籃預(yù)壓對(duì)線形有著密不可分的聯(lián)系。運(yùn)用大型有限元軟件Midas-Civil建立大橋模型,對(duì)大橋最大懸臂狀態(tài)、中跨合攏狀態(tài)、成橋后狀態(tài)下進(jìn)行應(yīng)力、彎矩、撓度的分析,并且獲得每一號(hào)段的預(yù)拱度,來(lái)指導(dǎo)現(xiàn)場(chǎng)施工。對(duì)懸臂澆筑施工過(guò)程進(jìn)行計(jì)算機(jī)仿真計(jì)算并與現(xiàn)場(chǎng)觀測(cè)的實(shí)際情況相結(jié)合,不斷修正模型參數(shù),合理調(diào)整下一階段的預(yù)拱度,來(lái)指導(dǎo)下一階段施工,最終使橋梁順利合攏,達(dá)到預(yù)期的理想線形效果。
[Abstract]:With the government increasing investment in infrastructure construction in the central and western regions, more and more long-span bridges have emerged in China. However, the increase of span will also bring difficulties to the design and construction of bridges, such as the high compressive stress of the main girder and cable tower, the difficulty of controlling the elevation in construction and the excessive deflection of the box girder. At the same time, the deformation of the structure and the stress state of the section are constantly changing in the construction stage, which is unfavorable to the construction quality and construction safety, and has a direct impact on the shape of the completed bridge and the stress state of the completed bridge. Linear control of long span prestressed concrete cable-stayed bridge is very important. Based on the comprehensive study of construction control of prestressed concrete cable-stayed bridge, this paper briefly introduces the development of prestressed concrete cable-stayed bridge, structural characteristics and the importance of the development of construction control research at home and abroad. The purpose of bridge construction control, the method of bridge construction alignment control and the factors influencing bridge construction alignment control are further introduced. Based on the engineering case of the cantilever cast-in-place construction monitoring of the main girder of Huaishang Huaihe River Bridge in Huainan City of Anhui Province, the contents, general theory and methods of the construction control of the Huai-Shang Huaihe River Bridge are expounded in detail. This paper mainly introduces the linear control of Huaihe River Bridge in the construction stage of construction control, the control node, the control content, including the prestressing tension before and after the concrete pouring, the cable hanging of the main bridge, and the closing sequence. The influence of temporary support removal and cable adjustment on the alignment of the bridge is also described in detail. At the same time, the monitoring technology of the main tower, pier and main bridge linear control is also described in detail. The stress effect, temperature effect and hanging basket preloading are closely related to the alignment. The model of the bridge is established by using the large-scale finite element software Midas-Civil. The stress, bending moment and deflection of the bridge under the condition of the maximum cantilever state, the middle span closing state and the post-completion state are analyzed, and the pre-arch degree of each section is obtained to guide the field construction. The computer simulation calculation of cantilever pouring construction process is carried out and combined with the actual situation observed in the field. The model parameters are constantly revised and the prearch degree of the next stage is adjusted reasonably to guide the construction of the next stage, and finally make the bridge close smoothly. Achieve the desired linear effect.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳宏亮;;橋梁上部結(jié)構(gòu)施工預(yù)拱度設(shè)置[J];山西建筑;2016年16期

2 王煦;董軍;;大跨度橋梁施工控制影響參數(shù)[J];土木建筑與環(huán)境工程;2015年S2期

3 韋作明;蒙方成;陳文;;矮塔斜拉橋施工階段線形敏感性分析[J];西部交通科技;2014年06期

4 張征文;李永慶;;基于荷載試驗(yàn)數(shù)據(jù)修正橋梁結(jié)構(gòu)有限元計(jì)算模型的研究[J];西安建筑科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年02期

5 齊玉超;;節(jié)段箱梁架設(shè)施工中0#塊定位及標(biāo)高調(diào)整技術(shù)[J];門(mén)窗;2013年05期

6 王學(xué)軍;;斜塔斜拉橋全橋調(diào)索設(shè)計(jì)與施工技術(shù)[J];國(guó)防交通工程與技術(shù);2013年S1期

7 劉世明;劉永健;耿東升;宋瑤;;現(xiàn)澆箱梁預(yù)應(yīng)力鋼筋張拉方式影響分析[J];公路交通科技;2013年03期

8 梁作領(lǐng);;連續(xù)梁橋臨時(shí)支撐拆除時(shí)機(jī)分析[J];筑路機(jī)械與施工機(jī)械化;2012年10期

9 秘志輝;;S32高速公路上海段跨大蒸港矮塔斜拉橋設(shè)計(jì)[J];城市道橋與防洪;2012年07期

10 李亮;李文珍;劉偉;;懸澆連續(xù)梁施工掛籃彈性及非彈性變形分析[J];四川建筑;2012年03期

相關(guān)碩士學(xué)位論文 前3條

1 許洋洋;溫度及收縮徐變效應(yīng)對(duì)大跨連續(xù)剛構(gòu)橋的影響[D];重慶大學(xué);2013年

2 黃馨;PC連續(xù)剛構(gòu)橋成橋線形控制研究[D];長(zhǎng)安大學(xué);2013年

3 高玉婷;某矮塔斜拉橋結(jié)構(gòu)特性的分析和研究[D];合肥工業(yè)大學(xué);2012年

，

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