Construction method of insulation board outside beam at cantilevered eaves

Abstract

The invention relates to the technical field of thermal insulation board installation construction, and specifically to a method for constructing thermal insulation boards on the outer side of beams at cantilevered eaves, and the steps are as follows: beam structure reinforcement binding; external cantilevered eaves casting template support and external cantilevered eaves structure reinforcement binding, after the external cantilevered eaves structure reinforcement binding is completed, according to the installation position of the thermal insulation board in the construction drawing, cushion blocks are arranged at intervals below the installation position of the thermal insulation board; the thermal insulation board is installed, when the thermal insulation board is installed, the lower edge of the thermal insulation board is pressed against the cushion blocks, and the side close to the beam structure reinforcement is fixed to the beam structure reinforcement through anchor bolts arranged at intervals; a beam casting template is set; concrete is poured for the beam structure and the external cantilevered eaves structure; through the construction method, the thermal insulation board, the beam structure and the external cantilevered eaves structure are cast and formed at one time, thereby improving the construction efficiency; at the same time, the appearance quality of the cantilevered eaves construction is improved, and the cost of later repairs is reduced; the thickness of the reinforcement protective layer is guaranteed, so that the thermal insulation board installation position is accurate, and the thermal insulation performance of the structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation board installation and construction, in particular to a thermal insulation board construction method for the outer side of a beam at an overhanging eave. Background Art

[0002] The integrated insulation board has been widely used in the insulation of walls, roofs, floors, etc. due to its low density, low thermal conductivity, shock resistance, corrosion resistance, mildew resistance, and good construction performance. In the prior art, the integrated construction method of the insulation board on the outside of the beam at the cantilevered eaves is as follows: first, the steel bars of the beam structure are tied, and then the cantilevered eaves casting formwork is set up to tie the steel bars of the cantilevered eaves structure; the insulation board is fixed to the steel bars of the beam structure with anchor bolts, and then the beam casting formwork is set up, and finally, the beam structure and the cantilevered eaves structure are cast in concrete.

[0003] When using the existing technology for construction, the following problems exist: the steel bars of the cantilevered eaves structure include a lower steel mesh, an upper steel mesh and saddle bars arranged between the lower steel mesh and the upper steel mesh; when installing the insulation board, the insulation board is directly seated on the upper steel mesh, and the upper steel mesh is only supported by the saddle bars arranged at intervals, which will cause the upper steel mesh to sink. Furthermore, for the position where the upper steel mesh directly contacts the insulation board, the upper steel mesh loses the protection of the steel bar protective layer, and the steel bars are prone to rust, which will cause the strength and rigidity of the concrete structure to decrease; for the position where the upper steel mesh does not contact the insulation board, the thickness of the steel bar protective layer becomes larger, and the concrete at the cantilevered eaves is prone to cracking, which reduces the construction quality of the cantilevered eaves. At the same time, due to the increase in the thickness of the steel bar protective layer, the installation position of the insulation integrated board will also be affected, which will in turn affect the thermal insulation performance of the structure, and later repairs will also increase the construction cost. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a method for constructing an insulation board on the outer side of the beam at the cantilever eaves, which can ensure the accurate installation position of the insulation board and does not affect the quality of the cantilever eaves structure.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A method for constructing an insulation board on the outer side of a beam at an overhanging eave, the construction steps are as follows:

[0007] S1: beam structure reinforcement binding;

[0008] S2: Support of the cantilever eaves casting formwork and binding of the cantilever eaves structural steel bars; the cantilever eaves structural steel bars include an upper steel mesh and a lower steel mesh, between which a horse stool bar is arranged; the longitudinal steel bars of the upper steel mesh and the longitudinal steel bars of the lower steel mesh are arranged parallel to the insulation board;

[0009] S3: Insulation board installation;

[0010] S4: Set the beam casting formwork;

[0011] S5: Concrete pouring of beam structure and cantilever structure;

[0012] In step S2, after the steel bars of the cantilever eaves structure are tied, pads are arranged at intervals below the installation position of the insulation board according to the installation position of the insulation board in the construction drawing; the pads are placed in the grids of the upper steel mesh and the lower steel mesh, and the bottom surface of the pads abuts against the bottom template in the cantilever eaves casting template;

[0013] In step S3, when installing the insulation board, the lower edge of the insulation board is pressed against the pad, and the side close to the beam structure steel bars is fixed to the beam structure steel bars by anchor bolts arranged at intervals.

[0014] Preferably, the longitudinal section of the cushion block is an inverted isosceles trapezoid.

[0015] Preferably, the height of the pad is equal to the thickness of the overhanging eaves, the top width of the pad is greater than or equal to the thickness of the insulation board, the top size of the pad is greater than the bottom size of the pad, and the bottom size of the pad is greater than or equal to 50mm*100mm and less than or equal to 100mm*100mm.

[0016] Preferably, in step S2, additional steel bars are provided on the upper steel mesh and the lower steel mesh, and the additional steel bars are provided parallel to the insulation board.

[0017] Preferably, at least three pads are placed under each insulation board.

[0018] Preferably, the front, rear, left and right sides of the cushion block are roughened.

[0019] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features:

[0020] Through this construction method, the insulation board, beam structure, and cantilevered eaves structure are cast and formed at one time, thereby improving construction efficiency. At the same time, by arranging pads under the insulation board, the weight of the insulation board is prevented from directly pressing on the steel bars of the cantilevered eaves structure, thereby preventing deformation of the steel bars of the cantilevered eaves structure, thereby ensuring the construction quality of the cantilevered eaves, improving the appearance quality of the cantilevered eaves construction, and reducing the cost of later repairs. The thickness of the steel bar protective layer is ensured, so that the insulation board is installed in an accurate position, thereby improving the thermal insulation performance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the construction structure of the insulation board outside the beam at the cantilevered eaves in the prior art;

[0022] Figure 2 It is a schematic diagram of the construction structure of the insulation board outside the beam at the cantilevered eaves in the embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the construction structure of the insulation board outside the beam at the double-layer overhanging eaves in the embodiment of the present invention;

[0024] Figure 4 It is another structural schematic diagram of the construction of the insulation board outside the beam at the cantilevered eaves in the embodiment of the present invention;

[0025] Figure 5 It is a schematic structural diagram of a cushion block with a slot in an embodiment of the present invention.

[0026] Explanation of the reference numerals: 1. Beam structural steel bars; 2. Cantilever eaves casting formwork; 3. Cantilever eaves structural steel bars; 301. Upper steel mesh; 302. Lower steel mesh; 303. Saddle bars; 304. Additional steel bars; 4. Insulation board; 5. Anchor bolts; 6. Spacers; 601. Slots. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0028] like Figure 1 As shown in the prior art, the insulation board 4 is directly pressed on the cantilevered eaves structural steel bar 3 during installation, which easily causes the cantilevered eaves structural steel bar 3 to deform, affecting the cantilevered eaves construction quality. Figure 2 , Figure 4 As shown, in embodiment 1, a method for constructing an insulation board outside the beam at the eaves is provided, and the construction steps are as follows:

[0029] S1: Beam structure reinforcement 1 binding.

[0030] S2: Installation of the cantilever eaves casting formwork 2 and binding of the cantilever eaves structural steel bars 3; the specific steps are as follows:

[0031] S201: Erect formwork support system scaffolding and external scaffolding;

[0032] S202: Setting a bottom formwork of an overhanging eaves casting formwork 2 on a formwork support system scaffold;

[0033] S203: tying the cantilevered eaves structural steel bars 3 on the bottom template, the cantilevered eaves structural steel bars 3 comprising an upper steel mesh 301 and a lower steel mesh 302, a saddle bar 303 is arranged between the upper steel mesh 301 and the lower steel mesh 302; wherein the upper steel mesh 301 and the lower steel mesh 302 are both formed by tying transverse bars and longitudinal bars, wherein the longitudinal bars are arranged parallel to the lower edge of the insulation board 4;

[0034] S204: After the steel bars 3 of the cantilevered eaves structure are tied, the side formwork of the cantilevered eaves casting formwork 2 is installed and fixed;

[0035] S205: According to the installation position of the insulation board 4 in the construction drawing, a pad block 6 is arranged at intervals on the lower side of the installation position of the insulation board 4; the pad block 6 is located in the grid of the upper steel mesh 301 and the lower steel mesh 302, and the bottom surface of the pad block 6 abuts against the bottom template of the cantilever eaves casting template 2; wherein, the pad block 6 is a concrete pad block 6, and the concrete model is consistent with the concrete model of the cantilever eaves structure; the height of the pad block 6 is equal to the thickness of the cantilever eaves.

[0036] S3: The insulation board 4 is installed; when the insulation board 4 is installed, the lower edge of the insulation board 4 is pressed against the pad 6, and the side close to the beam structure steel bar 1 is fixed to the beam structure steel bar 1 by anchor bolts 5 arranged at intervals.

[0037] S4: Set up beam casting formwork.

[0038] S5: Concrete pouring of beam structure and cantilevered eaves structure; the external insulation structure, beam structure and cantilevered eaves structure are cast in one step, which improves the construction efficiency.

[0039] Embodiment 2, as Figure 3 As shown, the construction method of the insulation board 4 on the outside of the beam at the eaves of the present invention is also applicable to double-layer eaves structures. For the sake of aesthetics, many building exterior walls are designed with double-layer eaves. To avoid the cold and hot bridge effect, an insulation board 4 needs to be arranged between the double-layer eaves; as in Example 1, when performing step S2 of supporting the eaves casting formwork 2 and tying the eaves structural steel bars 3, it includes supporting the eaves of the next layer and the eaves casting formwork 2 of the previous layer and tying the structural steel bars; when installing the insulation board 4 in step S3, the lower side of the insulation board 4 abuts against the pad 6, and the upper side abuts against the lower side of the bottom formwork of the eaves casting formwork 2 of the previous layer.

[0040] Embodiment three, as Figure 2 On the basis of Example 1, in some constructions, due to the demand for structural strength, it is necessary to add additional steel bars 304 to the structural steel bars of the cantilevered eaves. The additional steel bars 304 are tied and fixed to the upper steel mesh 301 and the lower steel mesh 302. At the same time, the additional steel bars 304 are parallel to the longitudinal steel bars in the upper steel mesh 301 and the lower steel mesh 302. In this embodiment, the additional steel bars 304 are used to further clamp and fix the cushion block 6. The two sides of the cushion block 6 are clamped and fixed by the additional steel bars 304, the longitudinal steel bars in the upper steel mesh 301 and the lower steel mesh 302.

[0041] Embodiment 4, on the basis of embodiment 3, due to the presence of additional steel bars 304, the steel bars 3 of the cantilevered eaves structure are more dense, and the pad 6 is not easy to place. If the pad 6 is too small, it will not provide good support for the insulation board 4; therefore, in this embodiment, the longitudinal section of the pad 6 is an inverted isosceles trapezoid, which is convenient for the lower end to be inserted into the dense cantilevered eaves structure steel bars 3; the top surface width of the pad 6 is greater than or equal to the thickness of the insulation board 4, the top surface size of the pad 6 is greater than the bottom surface size of the pad 6, and the bottom surface size of the pad 6 is greater than or equal to 50mm*100mm and less than or equal to 100mm*100mm; in this embodiment, the thickness of the insulation board 4 is 100mm, and correspondingly, the top surface size of the pad 6 is 100mm*100mm, and the bottom surface size is 50mm*100mm. The left and right sides of the pad 6 are inclined surfaces, and the front and rear sides are vertical surfaces.

[0042] Embodiment 5, as Figure 5 In this embodiment, in order to ensure the stable insertion of the insulation board 4, the top surface size of the cushion block 6 is larger than the thickness of the insulation board 4, and a slot 601 is provided on the top surface of the cushion block 6. When the insulation board 4 is installed, the insulation board 4 is inserted into the slot 601.

[0043] Furthermore, in order to ensure the supporting stability of the insulation board 4, at least three pads 6 are placed under each insulation board 4. In this embodiment, four pads 6 are placed under each insulation board 4, and the spacing between the pads 6 is 300 mm.

[0044] Furthermore, the front, rear, left and right sides of the pad 6 are roughened to facilitate the combination with concrete and improve the quality of the cantilever eaves structure.

[0045] The present invention arranges a cushion block 6 under the insulation board 4 to prevent the weight of the insulation board 4 from directly pressing on the steel bars 3 of the cantilevered eaves structure, thereby preventing the steel bars 3 from deforming, thereby ensuring the construction quality of the cantilevered eaves, improving the appearance quality of the cantilevered eaves construction, and reducing the cost of later repairs; ensuring the thickness of the steel bar protective layer, making the insulation board 4 accurately installed, and improving the thermal insulation performance of the structure.

[0046] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A method for constructing an insulation board on the outside of a beam at an overhanging eave, the construction steps are as follows: S1: beam structure reinforcement (1) binding; S2: supporting the cantilever eaves casting formwork (2) and tying the cantilever eaves structural steel bars (3); the cantilever eaves structural steel bars (3) include an upper steel mesh (301) and a lower steel mesh (302), and a saddle bar (303) is arranged between the upper steel mesh (301) and the lower steel mesh (302); the longitudinal steel bars of the upper steel mesh (301) and the longitudinal steel bars of the lower steel mesh (302) are both arranged parallel to the insulation board (4); S3: Installation of insulation board (4); S4: Set the beam casting formwork; S5: Concrete pouring of beam structure and cantilever structure; It is characterized in that In step S2, after the steel bars (3) of the cantilevered eaves structure are tied, a pad (6) is arranged at intervals below the installation position of the insulation board (4) according to the installation position of the insulation board (4) in the construction drawing; the pad (6) is placed in the grid of the upper steel mesh (301) and the lower steel mesh (302), and the bottom surface of the pad (6) is in contact with the bottom template in the cantilevered eaves casting template (2); In step S3, when installing the insulation board (4), the lower edge of the insulation board (4) is pressed against the pad (6), and the side close to the beam structure steel bar (1) is fixed to the beam structure steel bar (1) through anchor bolts (5) arranged at intervals.

2. The method for constructing the insulation board outside the eaves beam according to claim 1, characterized in that: The longitudinal section of the cushion block (6) is an inverted isosceles trapezoid.

3. The method for constructing the insulation board outside the eaves beam according to claim 2, characterized in that: The height of the pad (6) is equal to the thickness of the cantilevered eaves, the width of the top surface of the pad (6) is greater than or equal to the thickness of the insulation board (4), the size of the top surface of the pad (6) is greater than the size of the bottom surface of the pad (6), and the size of the bottom surface of the pad (6) is greater than or equal to 50mm*100mm and less than or equal to 100mm*100mm.

4. The method for constructing the insulation board outside the eaves beam according to claim 2, characterized in that: In step S2, additional steel bars (304) are further arranged on the upper steel mesh (301) and the lower steel mesh (302), and the additional steel bars (304) are arranged parallel to the insulation board (4).

5. The method for constructing the insulation board outside the eaves beam according to claim 1, characterized in that: At least three cushion blocks (6) are placed under each insulation board (4).

6. The method for constructing the insulation board outside the eaves beam according to claim 1, characterized in that: The front, rear, left and right sides of the cushion block (6) are all roughened.

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