Research on Accurate and Rapid Construction Technologies of Large-span Curved Prestressed Beam
There are many difficulties in the construction of traditional long-span curved prestressed beam,taking a three-story stadium project in Suzhou as a case,by using animation to guide the construction of professional teams,the difficulties are solved in advance,and the application of technologies such as BIM collision optimization,main reinforcement positioning,stress-strain control and secondary grouting of long-span prestressed beam are also introduced.The conclusion shows that the use of special two-way rake adjustable auxiliary frame for beam steel bar positioning can ensure the accurate positioning and installation of steel bar skeleton.In addition,compared with the traditional tension and grouting construction technology,three-stage tension and secondary grouting technology can effectively save labor cost and material cost,and improve the firmness and service life of prestressed member system.The technologies described in this paper can be widely used in the construction of long-span prestressed concrete beams.
prestressedgymnasiumBIMmain reinforcement positioningstress and strainmultiple grouting
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