RESEARCH ON KEY CONSTRUCTION TECHNOLOGY OF GANGOU RIVER BRIDGE
In order to solve the problems of linear control and stability of hanging basket during cantilever construction of large-span continuous rigid frame bridge,the linear control system of continuous rigid frame bridge was used to monitor the linear control of hanging basket construction based on the TJ1 Biogangou river large bridge project of Luhongshan to Cili expressway,and the force and deformation of the main frame of hanging basket were calculated by numerical simulation.The research results show that during the construction of hanging basket hanging casting,the linearity of the continuous rigid frame bridge on the upper part of the No.17 pier is roughly a single-peak"parabola"type.After the actual data collection,the displacement of the beam section on site presents different degrees of deviation from the theoretical value,and the displacement deviation ranges from-0.956 mm to 0.954 mm,which is controlled within the error range of 1.0 mm.It shows that the construction control technology based on linear control system of continuous rigid frame bridge can play a good deformation control effect.In the stage of cantilever pouring,the vertical displacement of the front point of the triangular main frame of the hanging basket is 7 mm<20 mm,and the deformation meets the requirements.The maximum stress of the main frame member is 49.7 MPa<205 MPa,and the stress meets the requirements.
Gangou river bridgehigh speedcantilever hanging basketcontinuous rigid frame bridge
万方数据
维普
