Cast-in-place non-disassembly assembly type thermal insulation external formwork member and external wall structure and construction method

Abstract

The invention relates to a cast-in-situ dismantling-free assembling-type heat-preservation external formwork assembly, an external wall structure and a construction method.The external formwork assembly comprises a cement-based fine concrete external surface layer, a heat-preservation layer and a cement-based fine concrete internal surface layer, a steel mesh is embedded in the cement-based fine concrete external surface layer, and multiple anti-shear connecting parts are installed on the steel mesh in a clamped mode.The external wall structure comprises a prefabricated integral assembling heat-preservation external formwork and a shear wall, and the prefabricated integral assembling heat-preservation external formwork is formed by splicing assembling-type formwork components; wall body rebars are bound between the prefabricated integral assembling heat-preservation external formwork and a prefabricated internal formwork, concrete is poured into the portion between the prefabricated integral assembling heat-preservation external formwork and the prefabricated internal formwork, and then the shear wall is formed; the anti-shear connecting plates on the assembling-type external formwork assembly are poured in the shear wall in situ.Compared with the prior art, integral prefabricating hoisting is adopted, and secondary construction of the heat-preservation layer is omitted; the heat-preservation layer and the main body structure are integral and same in service life, and the durability of the heat-preservation layer is increased; the building wall heat-preservation performance can be improved, construction of an external formwork and an external scaffold can be omitted, the construction efficiency can be improved, and the cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of building exterior walls, and in particular relates to a cast-in-place non-disassembly assembly type thermal insulation external formwork member, an exterior wall structure and a construction method. Background technique [0002] Enforcement of building energy efficiency standards and strict control of construction waste and construction noise by urban management. [0003] In the traditional shear wall construction, after the steel bars are bound, the workers install the external and internal templates and support systems on the scaffolding platform and the floor respectively, and the internal and external templates are internally supported (generally fixed on the reinforcement cage with steel bars of equal length to the wall thickness) ) and the paired bolts or the paired flat irons form a concrete pouring cavity, and after the concrete reaches the formwork removal strength, the formwork and supports are ...

AI Technical Summary

Problems solved by technology

However, during implementation, the strength of the precast concrete exterior wall formwork and insulation layer alone cannot bear the self-weight of the poured concrete and the lateral pressure on the formwork during vibration. In addition, after pouring and forming in time, from the durability and firmness test, the insulation layer basically bears the weight of its own weight and the weight of the precast concrete exterior wall formwork, and then causes it to fall off; the main reason is that the insulation layer and the wall concrete are directly poured into shape. Under the action of large tension, the thermal insulation layer is variable, resulting in hollowing at the joint with the wall concrete; the bonding between the two material thermal insulation layers and the concrete does not fit well, and its bonding force is relatively poor, which cannot be achieved at all. The expected purpose, and then the implementation of this technology cannot be implemented and promoted. Similarly, this problem also exists at the junction of the precast concrete exterior wall formwork and the insulation layer

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