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Research of Construction Control on the Southen TaiZi Hu Arch Continuous Box Beam Bridge

Author: WangHaiLiang
Tutor: LiuZuoYu
School: Wuhan University of Technology
Course: Bridge and Tunnel Engineering
Keywords: arch continuous box beam construction control sensitivity analysis stress error analysis
CLC: U445.4
Type: Master's thesis
Year: 2007
Downloads: 62
Quote: 3
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Abstract

The southen taizi bridge is a key project of " six lakes running through " in Wuhan. The biggest feature of the bridge is the middle two 50-meter-long main span of a continuous, such as humps on the water. The southen taizi bridge used for the arch box beam structure, the structural characteristics, is a variable cross-section, V-shaped support continuous beam.The last 10 years, there are some V-shaped prestressed concrete bridge including continuous V-shaped beams and continuous rigid frame at home and abroad. As the V-shaped support greatly increased the fulcrum near beam stiffness, the corresponding reduce the structural deflection and span.As with diagonal bracing, in addition to the level of the structure outside lines, there are still inclined lines, coupled with a smaller component size, so that the bridge is very lithe beauty and particularly suited to urban and landscape areas require a higher use. However, due to its complex structure, construction difficult, the construction phase of the security force is no systematic study, So that type of bridge construction control study has important theoretical and practical significance.Judging from the structure of the entire life cycle and a large number of accident investigation, Most of the incidents occurred in the construction stage, structure in the construction process of structural nature of the shape and materials are changing with time, Construction of the changes in procedures as a result of the interaction of the entire structure of the mechanical behavior of highly influentialThis paper studyed the bridge construction phase of the internal forces of change and the urgent need to resolve the key issues in-depth and detailed with the engineering background of the southen taizi bridge. It is used to guide the construction and achieved good results. This paper includes the following aspects:1. Brief description of prestressed concrete bridge the development of domestic and foreign construction control of the status, introduced the content, method and influence factor to construction control, proposition main content and goal of this text and studying. 2. Established the southen taizi bridge model and analyzed its construction process, effective master the stress of key sections in construction phase,as well as to structural rigidity, beam self-respect, shrinkage and creep, and other factors doing the sensitivity analysis. The results show : concrete creep and shrinkage of the main beam deflection biggest impact and the impact of the bridge after a fairly long period of time have exacerbated the trend, Bridge which span poor deflection reach 5.1mm after three years .3. According to southen taizi bridge the characteristics of construction and structure , formulated a detailed construction monitoring program ,establish a complete construction control system, as well as the measured data error analysis, and guiding the construction. effectively. Test results show : the deck elevation to 14mm maximum deviation, the axis deviation 6mm frame drop into a bridge, the maximum compressive stress of 7.02 MPa , the section of concrete curbs under no tensile stress; Pipe pile largest settlement value of about 5mm, pouring process stress basic linear change, maximum stress to 60Mpa. Measured data show and the bridge alignment and bridge cross-section stress of the southen taizi bridge after meeting design specifications.The results of construction control Analysis on the southen taizi bridge presented implementation basis for this follow-up to the bridge construction supervision work, ensured that the construction is carried out smoothly. Meanwhile, the method of construction control used in the paper has some reference value to other similar bridge.

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge Construction > Construction Technology
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