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Research on Technique of Construction Surveying of Single Tower Cable-stayed Bridge

Author: LiJingGang
Tutor: WangGuangYue
School: Shandong University
Course: Structural Engineering
Keywords: Cable-stayed bridge Sarasota measurement Temperature and Displacement Refraction coefficient ANSYS
CLC: U442.4
Type: Master's thesis
Year: 2010
Downloads: 111
Quote: 0
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Abstract


Cable-stayed bridge with its superior spanning capabilities, of reasonable force system, as well as innovative structure, has become one of the fastest growing modern bridge engineering, most competitive bridge. Sarasota is a cable-stayed bridge load-bearing member and an important part of the cable-stayed bridge live load and dead load almost all by the Sarasota passed to the lower part of the tower pier and foundation. , Sarasota force is quite complicated, the only guarantee Sarasota geometry and spatial location in accordance with the design and specification requirements, to ensure the precise positioning of the cable ducts, in order to obtain the desired the geometric linear with the a reasonable internal forces state construction, these are Sarasota construction survey work proposed strict requirements. While in Sarasota pouring process, with the tower of increased atmospheric refraction coefficient caused by the sunshine of Sarasota Sunday deformation and so caused a great impact on the measurement work, so the construction methods of measurement of Sarasota Sunday the deformation law as well as influencing factors, and other issues of atmospheric refraction coefficient in-depth study to ensure the construction quality of the Sarasota. This paper studies the tower construction process used a variety of methods of measurement, analysis and comparison of the advantages and disadvantages of the various methods. Using precise zenith Standards Act, and in accordance with the actual situation of hanging steel rule passed elevation law, relative to the reference coordinate method, space linear equation three-dimensional coordinate law Liangji canal tower construction measurement and Cable Duct precision positioning to ensure positioning accuracy and improve the construction schedule. The site went on a different day case the Sarasota wall temperature measurement, based on the measured data of the Sarasota-sectional temperature distribution to fit the obtained temperature distribution fitting formula Liang Ji Canal Bridge Tower. Then established using ANSYS Sarasota 50m, 75m, 102m in three different height calculation model, deformation law in the Sunshine Temperature role system analysis. Computational analysis, and compared with the measured results obtained from the deformation of the basic laws of different heights Sarasota Sunday. Sarasota deformation constantly change as altitude increases, up to about 3.5cm to the maximum displacement in the north and south, but the overall trend is consistent, that is consistent with the direction of Sarasota's the swinging direction with the rotation of the sun, but the deformation direction than sunshine direction retardation a time period. Finally, through the analysis of of Atmospheric Refraction trials conducted in the survey area, found that atmospheric refraction coefficient with the underlying surface, weather factors have a great relationship, but when the stability of the external environment, the change has obvious Sunday laws and Based on the test results put forward some measures to reduce the effects of refraction coefficient measurement.

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CLC: > Transportation > Road transport > Bridges and Culverts > Investigation, design and calculation > Bridge site selection and measurement
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