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Method for reinforcing concrete structure by foam concrete prefabricated slab
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A technology of foam concrete and concrete structure, which is applied in the direction of building components, building structure, building maintenance, etc., can solve problems such as unusable and limited use, and achieve the effects of prolonging service life, improving seismic performance, and improving work performance
Inactive Publication Date: 2015-04-22
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
Although the lightweight wall plate is light in weight and high in strength, it combines the advantages of steel bars and concrete, can be prefabricated, has good durability, and is convenient for construction, but it cannot be used for load-bearing, and its use is greatly limited. Therefore, it is necessary to invent a more Universal and Applicable Prefabricated Panels
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Embodiment 1
[0033] Such as Figure 1-2 As shown, this embodiment provides a method for strengthening concrete structures with foam concrete prefabricated slabs, wherein the foam concrete prefabricated slab 1 is used for reinforcement, and an elastic layer is required to be laid on the outer surface of the reinforcement member, and then the prefabricated slab is wrapped on the elastic layer , followed by installation.
[0034] In this embodiment, the foam concrete prefabricated panel 1 is composed of a foam concrete layer 1.1, an insulation layer 1.5 and an appearance layer, the appearance layer is the outermost layer, the insulation layer is located between the foam concrete layer and the appearance layer, and the foam concrete layer is used for Connect with reinforcing members.
[0035] In this embodiment, the foamed concrete layer can be formed by cast-in-situ reinforced mesh or steel wire mesh or steel strand and foamed concrete, or formed by cast-in-situ foamed concrete. When streng...
Embodiment 2
[0046] This embodiment adopts the foam concrete prefabricated slab described in Embodiment 1 and the implementation steps to reinforce the column.
[0047] Such as Figure 3-5 As shown, for a square column, four square foam concrete slabs 1 of the same shape are tightly wrapped around the four sides of the column, and a thin rubber layer 3 is pasted between the column and the reinforcement plate. The connection form between the concrete slabs 1 adopts Welding 7, the stirrup 1.3 is welded at the position, and the reserved hole 2 is filled in time after the welding is completed, and the filling material can be cementmortar or concrete. For circular columns, the prefabricated slab can be made into a semi-circular arc shape, and behind the outsourcing and the column, the stirrup joints reserved for the prefabricated slab are welded.
Embodiment 3
[0049] In this embodiment, the foam concrete prefabricated slab described in Embodiment 1 and the implementation steps are used to replace the wall.
[0050] For load-bearing walls, the foam concrete prefabricated slabs can be directly filled between beams and columns to act as a wall, and the slabs can bear the upper load and meet the requirements of heat preservation and fire protection; for non-load-bearing walls, the concrete layer proposed by the present invention does not need reinforcement mesh 1.2, act as a wall directly.
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Abstract
The invention provides a foam concrete prefabricated slab and a method for reinforcing a concrete structure by the same. The method comprises the following steps: step1 designing the foam concrete prefabricated slab for reinforcement according to a reinforcement request. The prefabricated slab is composed of foam concrete layer, a heat insulation layer and an appearance layer. The foam concrete layer is formed by a steel bar mesh, a steel wire mesh or a steel strand and foam concrete in pouring mode. Stirrups are connected onto the steel bar mesh or the steel wire mesh in overlapping mode, steel bar connectors are retained on the stirrups to connect a plurality of adjacent prefabricated slabs, or the foam concrete layer is formed by pouring the foam concrete. The method further comprises the following steps: step2 laying an elastic layer on the outer surface of a structure member to be reinforced and step3 closely wrapping the prefabricated slab designed in the step1 on the elastic layer laid on the structure member in the step2 and welding the stirrups that the adjacent prefabricated slab corresponds to form a complete reinforcing layer. The slab and the method can combine advantages of concrete reinforcement and steel bonding method reinforcement and can be used for reinforcement of columns, beams, plates, piers, wall bodies and other members.
Description
technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for quickly repairing and reinforcing concrete structures by using prefabricated boards, and a prefabricated foam concrete board. Background technique [0002] The design service life of general concrete structures is 50 years. When the building structure has reached the design service life, the structural performance has not been greatly reduced, and it can still be used normally after reinforcement. Considering that the cost of demolition and reconstruction is relatively high, the method of structural reinforcement can be used to repair and reinforce the structure to ensure that its bearing capacity meets requirements. [0003] The structure has not reached the service life, but due to improper use and maintenance or construction quality reasons, or under the current relevant national regulations, the structural appraisal cannot meet the design requirements ...
Claims
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Application Information
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