Design and construction method of side face formworks of thick and large concrete structures

Abstract

The invention relates to the field of crossing of building formwork design and construction, in particular to a design and construction method of side face formworks of thick and large concrete structures. The design and construction method of the side face formworks of the thick and large concrete structures comprises the following steps of first, determining a calculation model of a formwork system; second, determining the axial tension of split bolts; third, determining materials of stress components of the formwork system; fourth, checking calculation of the bearing capacity of the formwork; fifth, checking calculation of secondary square beam bearing capacity; sixth, checking calculation of main square beam bearing capacity; seventh, checking calculation of split bolt bearing capacity; eighth, rechecking calculation of tensile strength of structural steel bars; ninth, manufacturing formworks; tenth, manufacturing a main square beam; eleventh, making bolts and cushion plates of thebolts; twelfth, bolt connection; thirteenth, fixing the formworks in place; and fourteenth, pouring concrete. According to the design and construction method of the side face formworks of the thick and large concrete structures, not only is the amount of split bolts used in the formworks reduced greatly, but also the key technical problems that the construction difficulty is large and the construction period is long are solved, and the prestressed force of a structural steel bar is established by using concrete lateral pressure to counteract the partial shrinkage stress of mass concrete, andthus the purpose of restraining cracking of a mass concrete structure is realized.

Description

technical field [0001] The invention provides a thick and large concrete structure side formwork design and construction method, which belongs to the cross technical field of building formwork design and construction, and is suitable for equipment foundations, independent pile caps, plate structure conversion layers, medical radiation protection equipment room roofs, etc. Concrete structure side formwork design and construction. Background technique [0002] With the rapid development of my country's construction technology, there are more and more concrete structures such as equipment foundations, independent pile caps, plate structure transfer floors, and roofs of medical radiation protection equipment rooms, with thicknesses generally ranging from 1.5 mm to 5.0 m. However, there is still a lack of scientific design and construction methods for the side formwork of thick and large concrete structures. Usually, the horizontal and vertical spacing of 0.4m to 0.6m is used to ...

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Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the object of the present invention is to: provide a kind of design and construction method of the side formwork of thick and large concrete structure, adopt structural steel bar and short bolt connection to form thick and large concrete side formwork double-tensioning bolt, it is traditional technology general long opposite-tensioning bolt 1 / 500 of the amount of bolt steel, not only can solve the key technical problems of difficult construction and long construction period, but also can use the concrete side pressure to establish the prestress of structural steel bars, offset the partial shrinkage stress of mass concrete, and realize the suppression of mass concrete The purpose of structural cracking; using two side-by-side channel steels to solve the key technical problem that the strength and stiffness of the super-large-span main corrugation do not meet the requirements; the formwork system can be factory-processed and assembled on site, with simple operation, high construction efficiency, and stable and reliable quality , meet the requirements of complementary advantages, energy saving and green construction, and have broad application prospects and significant social and economic benefits

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