A construction structure for preventing cracking of roof concrete protective layer

Abstract

The present invention discloses a construction structure for preventing cracking of a roof concrete protective layer, and relates to the technical field of roof protective layers. A construction structure for preventing cracking of a roof concrete protective layer comprises a concrete layer and also comprises: multiple groups of linearly arranged reinforcement meshes, all disposed within the concrete layer, wherein multiple pairs of metal plates are disposed within the concrete layer, the ends of the multiple groups of reinforcement meshes are respectively buckled onto the multiple metal plates, and a buffer portion for absorbing stress is provided between two adjacent metal plates; the present invention ensures that the two groups of reinforcement meshes have good integrity, thereby improving the crack resistance of the subsequent roof concrete protective layer, and the stress in the roof concrete protective layer can be released through the buffer portion, reducing the recurrence of cracks in other places, thereby improving the crack resistance of the roof concrete protective layer.

Description

Technical Field

[0001] The invention belongs to the technical field of roof protection layers, and in particular relates to a construction structure for preventing cracking of a roof concrete protection layer. Background Art

[0002] The roof concrete protective layer is a layer of fine aggregate concrete (usually 40mm-60mm thick) poured above the roof waterproofing layer or insulation layer. Its main function is to protect the waterproofing layer from mechanical damage, UV aging, and temperature fluctuations, while also enhancing the integrity and durability of the roof. Its strength grade is generally C20-C25.

[0003] To prevent cracking in the concrete cover, a wire mesh or fiber mesh (such as φ4@200mm bidirectional steel mesh) is typically laid within it. These reinforcements effectively disperse shrinkage stress in the concrete, significantly improving the tensile strength of the structure. However, in actual construction, the overlap between the two mesh sheets (typically requiring a 100-150mm overlap) remains a weak link, prone to cracking due to stress concentration or poor construction quality. Specifically, insufficient mesh overlap, loose binding, or uneven vibration during concrete pouring can all lead to stress concentration at the overlap. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a construction structure for preventing cracking of the roof concrete protective layer, which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A construction structure for preventing cracking of a roof concrete protective layer comprises a concrete layer and also comprises: a plurality of groups of linearly arranged reinforcement meshes, all of which are arranged in the concrete layer, wherein a plurality of pairs of metal plates are arranged in the concrete layer, the ends of the plurality of groups of reinforcement meshes are respectively buckled onto a plurality of metal plates, and a buffer portion for absorbing stress is provided between two adjacent metal plates.

[0007] Preferably, a hook is fixedly connected to the metal plate, and the end of the hook is provided with a guide oblique rod integrally formed therewith.

[0008] Preferably, the buffer portion includes a metal tube arranged in the concrete layer, a drainage cavity is provided in the metal tube, the two metal plates are symmetrically fixedly connected on both sides of the metal tube, and a strip groove is provided on the top of the concrete layer that penetrates into the metal tube.

[0009] Furthermore, both sides of the upper end of the metal tube are provided with inclined surfaces inclined toward the strip groove, and the lower end of the metal tube is fixedly connected to a suspended block.

[0010] Preferably, the buffer portion includes two vertical plates arranged in the concrete layer, a buffer gap is provided between the two vertical plates, the two metal plates are respectively fixedly connected to the side walls of the two vertical plates, a V-shaped buffer plate is fixedly connected between the top and bottom of the two vertical plates, and a U-shaped plate located in the buffer gap is fixedly connected between the two metal plates.

[0011] Furthermore, the upper and lower ends of the two vertical plates are fixedly connected with first L-shaped plates, and the two first L-shaped plates and the vertical plates are combined into a C-shaped member.

[0012] Preferably, the buffer portion includes a bottom plate arranged at the bottom of the concrete layer, horizontal plates are fixedly connected on both sides of the upper end of the bottom plate, and a curved buffer zone is provided on the horizontal plate, the ends of the two horizontal plates are fixedly connected to support plates, a buffer partition is provided between the two support plates, a V-shaped blocking partition is fixedly connected between the tops of the two support plates, and the two metal plates are respectively fixedly connected to the side walls of the two support plates.

[0013] Furthermore, a second L-shaped plate is fixedly connected to the tops of the two support plates.

[0014] Furthermore, both sides of the bottom plate are fixedly connected with supporting plates, and evenly distributed protrusions are fixedly provided on the supporting plates.

[0015] Furthermore, the buffer zone has a U-shape or a V-shape.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] 1. The present invention can conveniently, efficiently and stably fix the reinforcement net by buckling the mesh holes on the hooks, so that the reinforcement nets at adjacent positions have better connection rigidity, which can make the reinforcement net more stable and thus improve the crack resistance of concrete.

[0018] 2. The present invention effectively and firmly connects the reinforcement nets on both sides through the metal tube, so that the two groups of reinforcement nets have good integrity, thereby improving the crack resistance of the subsequent roof concrete protective layer, and the stress in the roof concrete protective layer can be released through the strip grooves, reducing the recurrence of cracks in other places, thereby improving the crack resistance of the roof concrete protective layer, and when water accumulates on the surface of the roof concrete protective layer, part of the water can enter the metal tube through the strip grooves and then be discharged from both ends of the metal tube, which can reduce the impact of water on the roof concrete protective layer and indirectly improve the crack resistance of the roof concrete protective layer.

[0019] 3. The present invention uses the stress generated in the concrete to push the two vertical plates towards or away from each other, and the U-shaped plate and V-shaped buffer plate between the two vertical plates can elongate or shorten under the action of compression and tension, thereby achieving the purpose of buffering stress and making the surface of the roof concrete protective layer have good crack resistance.

[0020] 4. The present invention realizes that when the concrete expands due to heat, the buffer groove will change from a rectangle to an inverted V shape under the action of extrusion and the buffer zone. When the concrete shrinks due to cold, the buffer groove will change to a straight V shape. The buffer zone and the buffer groove play a good buffering role during this period, which can make the roof concrete protective layer less likely to crack, thereby ensuring the crack resistance of the roof concrete protective layer.

[0021] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached figure:

[0023] Figure 1 A three-dimensional schematic diagram of a construction structure proposed by the present invention for preventing cracking of the roof concrete protective layer Figure 1 ;

[0024] Figure 2 The invention proposes a construction structure for preventing cracking of the roof concrete protective layer. Figure 1 Schematic diagram of the local structure;

[0025] Figure 3 The invention proposes a construction structure for preventing cracking of the roof concrete protective layer. Figure 1 Main view structure diagram;

[0026] Figure 4 A three-dimensional schematic diagram of a construction structure proposed by the present invention for preventing cracking of the roof concrete protective layer Figure 2 ;

[0027] Figure 5 The invention proposes a construction structure for preventing cracking of the roof concrete protective layer. Figure 4 Schematic diagram of the local structure;

[0028] Figure 6 The invention proposes a construction structure for preventing cracking of the roof concrete protective layer. Figure 4 Main view structure diagram;

[0029] Figure 7 A three-dimensional schematic diagram of a construction structure proposed by the present invention for preventing cracking of the roof concrete protective layer Figure 3 ;

[0030] Figure 8The invention proposes a construction structure for preventing cracking of the roof concrete protective layer. Figure 7 Schematic diagram of the local structure;

[0031] Figure 9 The invention proposes a construction structure for preventing cracking of the roof concrete protective layer. Figure 7 Schematic diagram of the main structure.

[0032] In the figure: 1. Concrete layer; 2. Reinforcement mesh; 3. Metal plate; 4. Guide diagonal rod; 5. Hook; 6. Metal pipe; 7. Strip groove; 8. Inclined surface; 9. Suspended block; 10. Bottom plate; 11. Horizontal plate; 12. Support plate; 13. Second L-shaped plate; 14. V-shaped blocking partition; 15. Buffer partition; 16. Vertical plate; 17. First L-shaped plate; 18. V-shaped buffer plate; 19. U-shaped plate; 20. Anti-slip plate; 21. Support plate; 22. Buffer gap; 23. Buffer zone; 24. Drainage cavity; 25. Bump. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0034] Example 1: Reference Figure 1-Figure 5 A construction structure for preventing cracking of a roof concrete protective layer includes a concrete layer 1, in which a fiber material that increases crack resistance, such as glass fiber or steel fiber, is mixed. The structure also includes: multiple groups of linearly arranged reinforcement meshes 2, all arranged in the concrete layer 1. The material of the reinforcement meshes 2 can be metal or glass fiber. Multiple pairs of transversely arranged metal plates 3 are arranged in the concrete layer 1, and the ends of the multiple groups of reinforcement meshes 2 are respectively buckled on the multiple metal plates 3. A buffer portion for absorbing stress is provided between two adjacent metal plates 3.

[0035] Specifically, during construction, the joint part of the reinforcement mesh 2 can be hung on the metal plate 3, so that the reinforcement meshes 2 at adjacent positions have better connection rigidity, which can make the reinforcement mesh 2 more stable, thereby improving the crack resistance of the concrete. After the concrete of the roof concrete protective layer solidifies, the buffer part can absorb part of the stress in the concrete, thereby further improving the crack resistance of the roof concrete protective layer. These stresses are mainly caused by the thermal expansion and contraction of the concrete.

[0036] A hook 5 is fixedly connected to the above-mentioned metal plate 3, and the end of the hook 5 is provided with a guide diagonal rod 4 integrally formed with it. When the reinforcement net 2 needs to be connected to the metal plate 3, the mesh holes on the reinforcement net 2 are buckled on the hook 5, so that the reinforcement net 2 can be fixed conveniently, efficiently and firmly. When fixing the reinforcement net 2, the guide diagonal rod 4 can make the mesh holes on the reinforcement net 2 more efficiently buckled onto the hook 5.

[0037] Example 2: Reference Figure 5 A construction structure for preventing cracking of a roof concrete protective layer is basically the same as that of Example 1, and further comprises:

[0038] The above-mentioned buffer part includes a metal tube 6 arranged in the concrete layer 1. The material of the metal tube 6 is stainless steel or galvanized steel. A drainage cavity 24 for drainage is provided in the metal tube 6. Two metal plates 3 are symmetrically fixedly connected on both sides of the metal tube 6. A strip groove 7 is provided on the top of the concrete layer 1 and penetrates into the metal tube 6. The width of the strip groove 7 is 1mm-4mm.

[0039] Specifically, when pouring the roof concrete protective layer, the metal pipe 6 is first laid on the upper end face of the waterproof layer, and then the reinforcement mesh 2 is hung on the two metal plates 3. At this time, the metal pipe 6 effectively and firmly connects the reinforcement meshes 2 on both sides, so that the two groups of reinforcement meshes 2 have good integrity, thereby improving the crack resistance of the subsequent roof concrete protective layer. Then, concrete is poured on the metal pipe 6 and the reinforcement mesh 2. After the concrete solidifies, a strip groove 7 is opened on the concrete that penetrates the metal pipe 6. The stress in the roof concrete protective layer can be released through the strip groove 7, reducing the recurrence of cracks in other places, thereby improving the crack resistance of the roof concrete protective layer. When water accumulates on the surface of the roof concrete protective layer, part of the water can enter the metal pipe 6 through the strip groove 7 and then be discharged from the two ends of the metal pipe 6. This can reduce the impact of water on the roof concrete protective layer and indirectly improve the crack resistance of the roof concrete protective layer. In addition, it is found during use that it is more suitable for use in an environment with more rain.

[0040] Both sides of the upper end of the above-mentioned metal tube 6 are provided with inclined surfaces 8 inclined toward the strip groove 7, and the lower end of the metal tube 6 is fixedly connected to a suspended block 9. When water accumulates on the surface of the roof concrete protective layer, part of the accumulated water can quickly flow into the metal tube 6 along the inclined surface 8, reducing the accumulated water from entering the gap between the metal tube 6 and the concrete, thereby improving the drainage performance of the roof concrete protective layer and reducing the probability of cracks caused by water absorption and expansion of the roof concrete protective layer. The suspended block 9 can make the metal tube 6 suspended above the waterproof layer to ensure the concrete's wrapping of the metal tube 6.

[0041] Example 3: Reference Figure 4 A construction structure for preventing cracking of a roof concrete protective layer is basically the same as that of Example 2, but further comprises:

[0042] The above-mentioned buffer part includes two vertical plates 16 arranged in the concrete layer 1. The material of the vertical plates 16 is stainless steel or galvanized steel. A buffer gap 22 is provided between the two vertical plates 16. The width of the buffer gap 22 is between 2mm-5mm. The two metal plates 3 are respectively fixedly connected to the side walls of the two vertical plates 16. A V-shaped buffer plate 18 is fixedly connected between the top and the bottom of the two vertical plates 16. A U-shaped plate 19 located in the buffer gap 22 is fixedly connected between the two metal plates 3.

[0043] Specifically, when pouring the roof concrete protective layer, the pouring depth of the concrete is made flush with the top of the vertical plate 16, and the bottom plate 10 is placed on the waterproof layer. The reinforcement mesh 2 on both sides can be ensured to be intact by the two vertical plates 16, the V-shaped buffer plate 18 and the U-shaped plate 19, thereby ensuring the crack resistance of the roof concrete protective layer given by the reinforcement mesh 2. The two vertical plates 16 can divide the roof concrete protective layer into two parts. When the roof concrete protective layer expands or shrinks, the stress generated will push the two vertical plates 16 closer to or away from each other. The U-shaped plate 19 and the V-shaped buffer plate 18 between the two vertical plates 16 can elongate or shorten under the action of compression and tension, thereby achieving the purpose of buffering stress and making the surface of the roof concrete protective layer have good crack resistance. In addition, it is found in use that it is particularly suitable for roof concrete protective layers with smaller thickness, such as roof concrete protective layers with a thickness of 15mm-30mm.

[0044] The upper and lower ends of the two vertical plates 16 are fixedly connected with the first L-shaped plates 17. The two first L-shaped plates 17 and the vertical plates 16 are combined into a C-shaped part. The vertical plates 16 with the first L-shaped plates 17 can be more firmly connected to the concrete, so that when the concrete expands or contracts, it can pull the vertical plates 16 to move synchronously.

[0045] The end of the metal plate 3 is fixedly connected with an anti-slip plate 20 , and the anti-slip plate 20 is attached to the vertical plate 16 , thereby improving the connection stability between the metal plate 3 and the vertical plate 16 .

[0046] Example 4: Reference Figure 4 A construction structure for preventing cracking of a roof concrete protective layer is basically the same as that of Example 3, but further comprises:

[0047] The above-mentioned buffer part includes a bottom plate 10 arranged at the bottom of the concrete layer 1, and horizontal plates 11 are fixedly connected to both sides of the upper end of the bottom plate 10, and a curved buffer zone 23 is provided on the horizontal plate 11. The shape of the buffer zone 23 is U-shaped or V-shaped, and the ends of the two horizontal plates 11 are fixedly connected to support plates 12. The materials of the bottom plate 10, the horizontal plate 11 and the support plates 12 are all stainless steel or galvanized steel. A buffer partition 15 is provided between the two support plates 12, and a V-shaped blocking partition 14 is fixedly connected between the tops of the two support plates 12. The two metal plates 3 are respectively fixedly connected to the side walls of the two support plates 12.

[0048] Specifically, when pouring the roof concrete protective layer, the upper end surface of the concrete is made flush with the top surface of the support plate 12, and the reinforcement mesh 2 on both sides can maintain integrity through the interconnected support plates 12, cross plates 11 and bottom plates 10, thereby ensuring the crack resistance of the roof concrete protective layer given by the reinforcement mesh 2. When stress is generated in the roof concrete protective layer due to thermal expansion and contraction, the concrete on both sides can push or pull toward the two support plates 12. When the concrete expands, the two support plates 12 will be pressed into the buffer groove 15. At this time, the buffer groove 15 will change from a rectangle to an inverted V shape under the action of extrusion and the action of the buffer zone 23. When the concrete shrinks, the buffer groove 15 will become a positive V shape. The buffer zone 23 and the buffer groove 15 play a good buffering role during this period, which can make the roof concrete protective layer less likely to crack, thereby ensuring the crack resistance of the roof concrete protective layer. In addition, it is found in use that it is more suitable for roof concrete protective layers with thicker thickness, such as roof concrete protective layers with a thickness of 40mm-60mm.

[0049] A second L-shaped plate 13 is fixedly connected to the top of the two support plates 12 , and the second L-shaped plate 13 can also improve the connection stability between the concrete and the support plates 12 .

[0050] Both sides of the above-mentioned base plate 10 are fixedly connected with a supporting plate 21, and evenly distributed protrusions 25 are fixedly provided on the supporting plate 21. Therefore, when pouring the roof concrete protective layer, the end of the concrete can be placed on the supporting plate 21. When the roof concrete protective layer expands or shrinks, the concrete with a slight movement at the end will move on the supporting plate 21 instead of moving horizontally on the waterproof layer, thereby reducing the impact of thermal expansion and contraction of the concrete on the waterproof layer.

[0051] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present invention can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A construction structure for preventing cracking of a roof concrete protective layer, comprising a concrete layer (1), characterized in that: Also includes: Multiple groups of linearly arranged reinforcement meshes (2) are all arranged in the concrete layer (1). Wherein, a plurality of pairs of metal plates (3) are arranged in the concrete layer (1), the ends of the plurality of groups of the reinforcing meshes (2) are respectively buckled on the plurality of metal plates (3), a buffer portion for absorbing stress is provided between two adjacent metal plates (3), a hook (5) is fixedly connected to the metal plate (3), and a guide oblique rod (4) integrally formed therewith is provided at the end of the hook (5); The buffer portion comprises a metal tube (6) arranged in the concrete layer (1), a drainage cavity (24) is provided in the metal tube (6), two metal plates (3) are symmetrically fixedly connected to both sides of the metal tube (6), and a strip groove (7) is provided on the top of the concrete layer (1) and penetrates into the metal tube (6); Alternatively, the buffer portion comprises two vertical plates (16) arranged in the concrete layer (1), a buffer gap (22) is provided between the two vertical plates (16), the two metal plates (3) are respectively fixedly connected to the side walls of the two vertical plates (16), a V-shaped buffer plate (18) is fixedly connected between the top and bottom of the two vertical plates (16), and a U-shaped plate (19) located in the buffer gap (22) is fixedly connected between the two metal plates (3); Alternatively, the buffer portion comprises a bottom plate (10) arranged at the bottom of the concrete layer (1), both sides of the upper end of the bottom plate (10) are fixedly connected to transverse plates (11), and a curved buffer zone (23) is provided on the transverse plates (11), the ends of the two transverse plates (11) are fixedly connected to support plates (12), a buffer partition (15) is provided between the two support plates (12), a V-shaped blocking partition (14) is fixedly connected between the tops of the two support plates (12), and the two metal plates (3) are respectively fixedly connected to the side walls of the two support plates (12).

2. A construction structure for preventing cracking of a roof concrete protective layer according to claim 1, characterized in that: Both sides of the upper end of the metal tube (6) are provided with inclined surfaces (8) inclined toward the strip groove (7), and the lower end of the metal tube (6) is fixedly connected to a suspended block (9).

3. A construction structure for preventing cracking of a roof concrete protective layer according to claim 1, characterized in that: The upper and lower ends of the two vertical plates (16) are fixedly connected to a first L-shaped plate (17), and the two first L-shaped plates (17) and the vertical plates (16) are combined into a C-shaped member.

4. A construction structure for preventing cracking of a roof concrete protective layer according to claim 1, characterized in that: A second L-shaped plate (13) is fixedly connected to the tops of the two support plates (12).

5. A construction structure for preventing cracking of a roof concrete protective layer according to claim 1, characterized in that: Support plates (21) are fixedly connected to both sides of the bottom plate (10), and evenly distributed protrusions (25) are fixedly provided on the support plates (21).

6. A construction structure for preventing cracking of a roof concrete protective layer according to claim 1, characterized in that: The buffer zone (23) has a U-shape or a V-shape.

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