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| Control of Rotation Construction for Prestressed Concrete T-shaped Rigid Frame Bridges |
| WEI Qing |
| (China Railway Design Corporation, Tianjin 300251, China) |
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Abstract Abstract：Research purposes： During the rotation construction process for T-shaped rigid frame bridges, stress and deformation of bridges is a complex condition. Many factors of the construction are difficult to accurately estimate in advance, although the most possible situation has been considered by designer, so it is necessory to monitor the construction process in real time. This paper takes the bridge in Shijiazhuang city as an example. In the construction process, the bridge structure is controlled in real time, and the control parameters are adjusted according to the control results, in order to make the deformation, internal force and linear shape of the structure meet the design requirements. Relevant data are collected to provide reference for the construction of similar structure. Research conclusions： (1) Through implementation of the reasonable control program, the theoretical values based on calculation of Midas civil software are compared with the measured values, we can see that the main beam elevation is closed to the predicted elevation, the key section stress of the main beam meet the specification requirements in the construction process, the bridge has a smooth linearity and reasonable pre-camber. (2) The parameters provided by test of weighing and bob-weight also ensure the safety of the bridge rotation construction. (3) The relevant data collected at the site can be used as the basis for technical management and technical evaluation during the operation of the bridge. (4) The research results can provide references for the design and construction of similar bridges.
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Received: 04 July 2017
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2017, Vol. 34 
