On-site formwork-erecting-free longitudinal and transverse wall connecting structure for superposed shear wall and construction process

Abstract

The invention discloses an on-site formwork-erecting-free longitudinal and transverse wall connecting structure for superposed shear walls and a construction process. Prefabricated concrete wall plates of prefabricated walls extend towards a joint position to form a closed cavity, a vertical post-pouring section is arranged in the closed cavity, horizontal connecting steel bars are arranged in a penetrating mode in advance, the horizontal connecting steel bars in the cavity are integrally moved to a designed position by means of a special shifting rod, and post-pouring concrete is poured to realize connection of the longitudinal and transverse prefabricated walls. According to the on-site formwork-erecting-free longitudinal and transverse wall connecting structure, the construction on-siteformwork-erecting-free of the longitudinal and transverse prefabricated wall connecting joint position vertical post-pouring section of the composite shear wall structure can be achieved, the site construction efficiency can be obviously improved, meanwhile, an edge component area with the stirrup restraining effect basically equal to that of the cast-in-place shear wall can be formed at the connecting joint position, the length of the horizontal connecting steel bars stretching into the cavity of the prefabricated walls can meet the lap joint force transmission requirement, the connecting integrity is high, and the structure is suitable for a high-layer superposed shear wall structure with the high seismic fortification requirement.

Description

technical field [0001] The invention belongs to the technical field of construction, and relates to a superimposed shear wall, in particular to an on-site formwork-free vertical and horizontal wall connection structure and a construction process for a superimposed shear wall. Background technique [0002] The prefabricated wall of the laminated shear wall structure is composed of precast concrete panels on both sides and the cavity between them. The precast concrete panels on both sides are connected as a whole by steel trusses, concrete longitudinal ribs or plane steel welded mesh. During on-site construction, the prefabricated concrete panels are also used as formwork for the post-cast concrete in the cavity, which can realize the on-site formwork-free shear wall. The on-site construction efficiency is high, and the construction quality is easy to guarantee without on-site formwork. [0003] However, in the actual composite shear wall structure, the vertical and horizontal...

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Problems solved by technology

[0003] However, in the actual composite shear wall structure, the vertical and horizontal prefabricated walls are mostly connected through the vertical post-casting section, and the vertical post-casting section still needs to be partially supported with formwork, which cannot maximize the advantages of prefabricated construction

There is no formwork-free connection structure for longitudinal and horizontal walls (see the China Engineering Construction Standardization Association standard "Technical Regulations for Assembling Integral Reinforced Welded Mesh Laminated Concrete Structures" T / CECS 579-2019). There are no stirrups and tie bars in the prefabricated walls. The range of concrete bound by stirrups in the member area is small or the concrete without stirrups cannot guarantee the compressive performance of the concrete in the edge member area. At the same time, the length of the horizontal connecting bars extending into the precast wall is short, which cannot meet the horizontal connecting bars and the precast wall. The need for lap joint force transmission of distributed steel bars leads to a limited application height. It is generally only used in multi-storey residential buildings with no more than six floors, and cannot be applied to high-rise residential buildings.

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