【摘要】：隨著我國(guó)交通行業(yè)的高速發(fā)展,大跨徑連續(xù)剛構(gòu)橋的使用越來越頻繁,尤其在地形復(fù)雜的西部山區(qū),大跨徑連續(xù)剛構(gòu)橋由于使用懸臂澆筑的方法進(jìn)行施工,因此能夠很好地跨越山谷、河流等地形。但是在其施工中影響結(jié)構(gòu)的因素過多,導(dǎo)致各個(gè)施工階段結(jié)構(gòu)的狀態(tài)與設(shè)計(jì)理論狀態(tài)有偏差,最終使成橋后結(jié)構(gòu)各方面無法與設(shè)計(jì)狀態(tài)相吻合,因此橋梁施工監(jiān)控在施工中有著重要的意義。本文主要研究?jī)?nèi)容如下:首先,簡(jiǎn)要介紹大跨徑連續(xù)剛構(gòu)橋的概念、特點(diǎn)及施工方法。同時(shí)論述施工控制的重要性,以及國(guó)內(nèi)外對(duì)于橋梁施工控制的研究狀況。其次,簡(jiǎn)要敘述施工控制的內(nèi)容和方法,同時(shí)討論影響橋梁結(jié)構(gòu)施工的主要參數(shù),引入敏感性分析的概念。最后,以摩西溝大橋?yàn)槔?論述了摩西溝大橋進(jìn)行施工監(jiān)控的內(nèi)容和方法以及取得的成果,同時(shí)通過參數(shù)單因子敏感性研究各參數(shù)對(duì)結(jié)構(gòu)線形的敏感程度,并確定設(shè)計(jì)中需要考慮的主要參數(shù)以及次要參數(shù),根據(jù)參數(shù)單因子敏感性分析可知,混凝土的容重對(duì)于結(jié)構(gòu)線形的影響很大,需要在施工中對(duì)各節(jié)段進(jìn)行試驗(yàn)分析,得到容重的真實(shí)值并作出相應(yīng)的調(diào)整,保證橋梁成橋后受力狀態(tài)和線形與設(shè)計(jì)狀態(tài)基本相符�；炷恋膹椥阅Ａ繉�(duì)結(jié)構(gòu)線形的影響次之,而相對(duì)于混凝土的容重和彈性模量對(duì)結(jié)構(gòu)線形的影響,管道摩阻系數(shù)、管道偏差系數(shù)和環(huán)境濕度則屬于設(shè)計(jì)次要參數(shù),對(duì)結(jié)構(gòu)的線形影響較小。在參數(shù)單因子敏感性分析的基礎(chǔ)上選取一定的組合進(jìn)行參數(shù)雙因子敏感性分析,試探性研究各參數(shù)組合作用對(duì)結(jié)構(gòu)線形的影響程度。
[Abstract]:With the rapid development of transportation industry in our country, the use of long-span continuous rigid frame bridge is becoming more and more frequent, especially in the mountainous area of western China with complicated terrain, the long-span continuous rigid frame bridge is constructed by the method of cantilever pouring. Thus it is possible to cross over valleys, rivers, etc. However, there are too many factors that affect the structure in the construction, which leads to the deviation between the state of the structure and the design theory state in each construction stage, and finally makes the structure after the completion of the bridge can not match with the design state. Therefore, bridge construction monitoring is of great significance in construction. The main contents of this paper are as follows: firstly, the concept, characteristics and construction methods of long span continuous rigid frame bridge are briefly introduced. At the same time, the importance of construction control and the research status of bridge construction control at home and abroad are discussed. Secondly, the contents and methods of construction control are briefly described, and the main parameters affecting the construction of bridge structure are discussed, and the concept of sensitivity analysis is introduced. Finally, taking Moshe ditch Bridge as an example, the contents, methods and achievements of construction monitoring of Moshe ditch Bridge are discussed. At the same time, the sensitivity of each parameter to structural alignment is studied by single factor sensitivity. According to the single factor sensitivity analysis of the parameters, the concrete bulk density has a great influence on the structure line shape, so it is necessary to carry on the test analysis to each section in the construction, and determines the main parameter and the secondary parameter which should be considered in the design, according to the parameter single factor sensitivity analysis, The real value of bulk density is obtained and the corresponding adjustment is made to ensure that the force state and the line shape of the bridge are basically consistent with the design state. The influence of the elastic modulus of concrete on the linear shape of the structure is the second, while the influence of bulk density and elastic modulus of concrete on the linear shape of the structure, the friction coefficient of the pipeline, the deviation coefficient of the pipeline and the humidity of the environment belong to the secondary parameters of the design. It has little effect on the alignment of the structure. Based on the single factor sensitivity analysis of parameters, a certain combination is selected to analyze the sensitivity of two factors, and the influence of each parameter combination on the structure alignment is studied tentatively.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.4;U448.23

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