本文選題：拱橋架設(shè)　切入點(diǎn)：新型塔架　出處：《福建農(nóng)林大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：無(wú)支架纜索吊裝是橋梁建設(shè)常用的施工方法,產(chǎn)生后至今已見證了無(wú)數(shù)橋梁的建成,在橋梁建造史上具有重要的地位。然而,傳統(tǒng)上吊裝系統(tǒng)塔架的研究大多是門式塔架,對(duì)于獨(dú)立式塔架纜索吊裝系統(tǒng)的研究卻少見報(bào)道,因此加強(qiáng)對(duì)其進(jìn)一步研究具有重要的實(shí)際意義。本文對(duì)一種新型的獨(dú)立式塔架及其纜索吊裝系統(tǒng)的設(shè)計(jì)進(jìn)行了研究,結(jié)合橋梁實(shí)例進(jìn)行了可行性論證,通過施工監(jiān)控的理論計(jì)算及實(shí)測(cè)結(jié)果分析,總結(jié)了該型系統(tǒng)的總體應(yīng)用實(shí)施效果,所作的研究工作可為該型塔架的推廣應(yīng)用提供參考。具體的內(nèi)容如下：(1)綜述了傳統(tǒng)門式塔架與獨(dú)立式塔架在橋梁纜索吊裝中的應(yīng)用現(xiàn)狀及纜索吊裝施工監(jiān)控的研究現(xiàn)狀,指出了纜索吊裝塔架與吊裝系統(tǒng)及其施工過程監(jiān)控存在的問題,進(jìn)而確定了論文的研究?jī)?nèi)容。在此基礎(chǔ)上,從概念設(shè)計(jì)上提出了新型獨(dú)立式塔架纜索吊裝系統(tǒng)。其中,塔架部分主要從拼接方式(選用不同連接構(gòu)件)、整體橫移實(shí)現(xiàn)方式等方面內(nèi)容進(jìn)行說明；吊裝系統(tǒng)部分則從工作原理、施工要領(lǐng)等角度論述,之后從安全性、經(jīng)濟(jì)性、施工便捷性等層面總結(jié)了該型塔架的優(yōu)點(diǎn)并作分析。(2)本文以寧德市壽寧縣坪坑大橋?yàn)楣こ瘫尘?通過實(shí)地調(diào)查,在掌握與分析該橋所處特殊地形地質(zhì)及周圍環(huán)境條件下,因地制宜,確定了本橋合理的吊裝方案,即采用新型獨(dú)立式塔架纜索吊裝系統(tǒng)；然后對(duì)全橋纜索吊裝系統(tǒng)進(jìn)行索系選型與計(jì)算,采用有限元分析軟件對(duì)塔架結(jié)構(gòu)進(jìn)行應(yīng)力分析,接著對(duì)塔架橫移進(jìn)行設(shè)計(jì)與計(jì)算,并驗(yàn)算了東、西兩岸錨錠系統(tǒng),全橋具有較高設(shè)計(jì)完整性,計(jì)算結(jié)果均能滿足設(shè)計(jì)要求。(3)利用橋梁分析軟件Midas對(duì)拱肋在拱箱節(jié)段吊裝與合龍、橋面鋪裝完成、徐變10年后等不同吊裝施工階段的過程監(jiān)控進(jìn)行仿真分析,并繪出主拱肋施工預(yù)拱度分布圖,其理論計(jì)算結(jié)果可為主拱肋吊裝施工控制及保證拱橋成橋線形提供參考依據(jù)。(4)通過入駐現(xiàn)場(chǎng)實(shí)測(cè),對(duì)坪坑大橋拱肋的高程及軸線偏差進(jìn)行了監(jiān)控測(cè)量,對(duì)主拱圈拱肋截面(如拱腹、拱腳、拱頂?shù)?進(jìn)行了應(yīng)變測(cè)試,數(shù)據(jù)表明,拱箱合龍高程及軸線誤差滿足誤差評(píng)定要求,內(nèi)部的應(yīng)力分布均勻合理,整體趨勢(shì)與設(shè)計(jì)預(yù)期基本吻合,進(jìn)而驗(yàn)證了新型獨(dú)立式塔架纜索吊裝系統(tǒng)內(nèi)部整體工作是有效可行的。
[Abstract]:Scaffolding cable hoisting is a common construction method in bridge construction, and it has witnessed the construction of numerous bridges up to now, which plays an important role in the history of bridge construction. However, the research on the cable hoisting system of the independent tower is rarely reported, so it is of great practical significance to strengthen the further research on it. In this paper, the design of a new type of independent tower and its cable hoisting system is studied. The feasibility of the bridge is demonstrated, and through the theoretical calculation of construction monitoring and the analysis of the measured results, the overall application effect of this type of system is summarized. The research work can provide a reference for the popularization and application of this type of tower. The concrete contents are as follows: (1) the application status of traditional portal tower and independent tower in bridge cable crane installation and the research status of cable crane construction monitoring are summarized. This paper points out the problems existing in the monitoring and control of cable crane tower mounting system and hoisting system and its construction process, and then determines the research contents of the paper. On the basis of this, a new type of independent tower cable hoisting system is put forward from the view of concept design. The tower frame is mainly explained from the aspects of splicing mode (selecting different connecting components and realizing mode of overall transverse movement, etc.); the lifting system part is discussed from the aspects of working principle, construction essentials and so on, and then from the aspects of safety, economy, etc. Based on the engineering background of Pingkeng Bridge in Shouning County, Ningde City, through field investigation, under the condition of mastering and analyzing the special topography, geology and surrounding environment of the bridge, the advantages of this type of tower are summarized and analyzed. According to the local conditions, the reasonable lifting scheme of the bridge is determined, that is, the new independent tower cable hoisting system is adopted, and then the cable system selection and calculation are carried out, and the stress analysis of the tower structure is carried out by using the finite element analysis software. Then the design and calculation of the tower's transverse movement are carried out, and the anchor ingot system on the east and west banks is checked. The whole bridge has high design integrity, and the calculation results can meet the design requirements. (3) the bridge analysis software Midas is used to hoist and close the arch rib in the arch box segment. After the completion of bridge deck paving and creep for 10 years, the monitoring process of different hoisting construction stages is simulated and analyzed, and the distribution map of pre-arch degree of main arch rib construction is drawn. The theoretical calculation results can mainly be used to control the hoisting of arch ribs and to provide reference basis for ensuring the alignment of arch bridges. The elevation and axis deviation of arch ribs of Pinkeng Bridge are monitored and measured through the field measurement. The strain test of the arch rib section of the main arch ring (such as arch belly, arch foot, arch roof etc.) is carried out. The data show that the errors in the height and axis of the closure of the arch box meet the requirements of error evaluation, and the internal stress distribution is even and reasonable. The overall trend is basically in line with the design expectation, which proves that the whole work of the new independent tower cable crane system is effective and feasible.
【學(xué)位授予單位】：福建農(nóng)林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.464

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