Construction method of non-support formwork gunning concrete bearing wall

Abstract

The invention provides a construction method of gunning concrete bearing walls without supporting templets, which is characterized in that an eccentric sandwich reinforcing rod cross bonding rack plate used as a bearing wall rack is directly sprayed with a concrete layer as the bearing wall on a single side or both sides of an insulating layer of the rack plate by means of plain net grids and crossed inclined yarns as the frame support, and spraying and coating are carried out simultaneously. When the plain net grid of the eccentric sandwich reinforcing rod cross bonding rack plate is greater than 5cm, one side is directly sprayed as the insulating layer, and the supporting templet at the other side is jetted with concrete as the bearing layer; spraying and jetting concrete on inner and outer walls are carried out step by step. The invention can save a great deal of templets, simultaneously saves the construction period, reduces the engineering cost and efficiently solves the cracking problem of mortar coverage outside the insulating layer.

Description

technical field [0001] The invention relates to a construction method for spraying a concrete load-bearing wall without a support formwork, and belongs to the technical field of building structures and construction methods. Background technique [0002] During the construction of houses, a large amount of formwork support is required when pouring concrete load-bearing walls. In order to make reinforced concrete walls meet energy-saving requirements, people use reinforced grid sandwich panels as concrete sandwich insulation load-bearing walls. Its method is also the same as in the construction of ordinary concrete walls, supporting the formwork on both sides, relying on a large amount of wood, steel pipes on both sides and through the through bolts passing through the wall to fix the formwork, thus wasting a lot of wood, steel and labor, and one side ( or both sides) the steel wire grid sandwich panel with steel wire mesh is placed in the outer formwork of the wall, and then ...

AI Technical Summary

Problems solved by technology

Its method is also the same as in the construction of ordinary concrete walls, supporting the formwork on both sides, relying on a large amount of wood, steel pipes on both sides and through the through bolts passing through the wall to fix the formwork, thus wasting a lot of wood, steel and labor, and one side ( or both sides) the steel wire grid sandwich panel with steel wire mesh is placed in the outer formwork of the wall, and then the concrete for the wall is poured. After the formwork is removed, the crack-proof mortar is applied to the outside of the outer steel wire grid sandwich panel , the construction industry is commonly known as the "large-scale built-in" method. When the concrete is poured on the inner wall, the lateral stress of the concrete will squeeze the insulation board to the outer steel wire mesh, so that the steel wire mesh directly contacts the insulation layer, resulting in the plastered surface. When layering mortar, the surface layer mortar cannot wrap the steel mesh well, thus causing the surface layer to crack

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