Construction method for casting prefabricated mass concrete beam by using special support devices

Abstract

The invention relates to a construction method for casting a prefabricated mass concrete beam by using special support devices. The construction method comprises the steps: (1) calculating the number of used special support devices according to total weight; (2) locking a scaffold; (3) sleeving vertical rod sleeves, which are integrally formed beneath lower supporting stages, on the upper ends of scaffold vertical rods below a bottom mold and fixing by pin bolts, welding the lower ends of guiding tubes to the upsides of the lower supporting stages, sleeving springs on the external walls of the guiding tubes, and inserting guiding columns, which are integrally formed beneath upper supporting stages, into the guiding tubes; (4) fixedly mounting scaffold cross rods and wooden square beams at the upsides of the upper supporting stages; (5) carrying out first-time concrete pouring, and after predetermined strength is reached, carrying out second-time concrete pouring until the casting of a whole prefabricated mass concrete beam is completed. According to the construction method, the rigid connection between the beam and a support system after the first-time concrete pouring is completed is changed, and supported parts and the beam bottom mold form flexible connection, so that cast parts and the scaffold are cooperatively stressed during the second-time pouring of mass concrete.

Description

technical field [0001] The invention belongs to the field of concrete beam construction, in particular to a construction method for pouring an assembled large-volume concrete beam with a special supporting device. Background technique [0002] In the design of tall buildings, there are many designs of beam transfer floors. In order to reduce the weight of the first poured concrete during construction, reduce the amount of formwork support, and effectively reduce the cost of the project, the superimposed pouring method is generally used to set up the formwork during construction. In this construction method, how to effectively control the strength of the beams and scaffolds that have been poured after the first pouring to jointly support the weight and construction load of the second pouring concrete has become a key task to ensure the construction quality of the second pouring. . The common practice in the prior art is: during the construction of the beam transfer layer, a...

AI Technical Summary

Problems solved by technology

Although this method is simple, it is poor in operability in actual engineering, and is prone to engineering accidents due to the limitation of the construction personnel's operating level, and the accuracy of the operation is not high at the same time.

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