Assembling-type building prefabricated reinforced concrete inner heat preservation wall body and inner-outer wallboard connecting reinforced steel bar

Abstract

The invention relates to an assembling-type building prefabricated reinforced concrete inner heat preservation wall body and an inner-outer wallboard connecting reinforced steel bar, aims at improving the present prefabricated reinforced concrete inner heat preservation wall body, and is characterized in that: an axial connection reinforced steel bar in an alternate reinforced concrete short column is used for joining an H-shaped inner reinforced concrete wallboard and an H-shaped outer reinforced concrete wallboard, which are alternatively arranged, at least one section of the axial connection reinforced steel bar is wrapped by a heat insulation material with the heat conductivity being lower than that of the concrete, and the short concrete columns are separated from one another throughthe heat insulation material with the heat conductivity being lower than that of the concrete. On the premise that the overall structural strength of the inner heat preserving wall body is guaranteed, the cold-hot bridge phenomenon between the inner wallboard and the outer wallboard can be greatly reduced, and a heat conduction coefficient of each wall body is less than or equal to 0.45W / m<2> K; the cost of the connection short columns between the inner and the outer wallboards is greatly reduced, the cost of the connection short columns is slightly higher than that of the reinforced concreteshort column, and the cost of the connection short column is only one fourth of that of a fiberglass reinforced polyester (FRP) connection column. At least one section of the short-column connection reinforced steel bar in the axial direction is wrapped by the heat insulation material with low heat conductivity, the heat insulation material is simple to produce, a low-heat bridge connection reinforced steel bar is formed, a mold injection or immersion production way can be adopted, and the industrialized low-cost mass production can be realized. The axial connection reinforced steel bar in the connection concrete short column adopts an annular loop structure, the steel reinforced steel bar is greatly convenient to place, and the inner and the outer wallboard reinforced steel bars can be greatly conveniently connected with each other, the setting difficulty is not increased, and the mass production can be realized.

Description

technical field [0001] The present invention is a further improvement and perfection of the applicant's previous patent application 201010261405.2 "prefabricated concrete inner thermal insulation wall", especially relates to a prefabricated reinforced concrete inner thermal insulation of prefabricated buildings with small heat transfer coefficient, good thermal insulation performance and lower cost Connecting steel bars for walls and inner and outer wall panels. Background technique [0002] The applicant previously applied for a series of prefabricated reinforced concrete prefabricated buildings with thermal insulation walls, such as Chinese patents 200710023502.62, 200710132534.X, 200820033303.3, 200920038302.2, 200920046133.7, 200910264184.1, 2010101154 wall 32.9 The overall structure), the overall connection of the interior and exterior wall panels of the phases adopts short columns of reinforced concrete with phases. In this structure, the internal thermal insulation w...

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Problems solved by technology

[0005] Although the above two patents proposed to use low thermal conductivity FRP connecting columns instead of reinforced concrete short columns to connect the inner and outer wall panels, although the heat transfer coefficient of the thermal insulation wall was greatly reduced, the materials and production costs of the FRP connectors were relatively high, and The amount used in the wall is large, and the mass production of the connector itself is difficult, resulting in a greater increase in cost than the reinforced concrete short column; secondly, the compressive and shear performance of the FRP connector is relatively worse than that of the reinforced concrete column. It needs to be compensated by increasing the section, which increases the cost of the connecting column of the inner and outer wall panels. The cost of the FRP connecting column with the same force is about 5 times that of the reinforced concrete connecting column; moreover, the positioning and layout of the FRP connecting piece is relatively complicated, which also increases the cost of the internal wall panel. Difficulty in manufacturing insulation walls

All of these make it more difficult to promote and apply, so there is still room for improvement

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