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1 Reports on Geodesy

1 2011

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Application of kinematic models of geodesic network for surveying settlement dynamics of a suspension bridge deck

Kowalski R., Kornatowska Ż., Miksa A.

Reports on Geodesy

2011

z. 1/90

Specific character of the engineering geodesy is based, among other things, upon the complexity and variety of surveying methods used for performing particular tasks. They should be adjusted to the specific conditions of the surveyed object and its’surroundings. A choice of the adequate methods of survey results handling is equally important for the correct description of the researched phenomenon. This paper presents a concept for measuring suspension bridge span deflection inducted by atmospheric conditions, in particular suspension cable length changes caused by insolation. The survey was performed using modified trigonometric levelling, incorporating monitoring of temporary refraction factor changes considered during bridge span dynamics calculations. Movement parameters of the selected points were calculated using a kinematic model of geodesic network. Assessment of approximate movement parameters indispensable for the method application was made with an assumption of a static model of realised observations.