Anti-cracking roof prestressed concrete double-t board

Abstract

The utility model discloses a kind of anti-cracking roof prestressed concrete double T boards, applied in the field of building beam body, solve the technical problem that the surface of existing concrete double T board panel is prone to cracking, its technical scheme main point is including horizontal top plate and vertical beam, the vertical beam is set along the length direction of horizontal top plate, the horizontal top plate is movably connected between vertical beam, the bottom of horizontal top plate is symmetrically equipped with a pair of beam clamping groove for vertical beam clamping installation, the horizontal top plate includes supporting plate and wing plate movably assembled with both sides of supporting plate, the side of horizontal top plate is equipped with control module matched with intelligent steel strand, the top of supporting plate and wing plate is equipped with cast-in-place layer, the top of supporting plate is equipped with several reinforcing bars, the end of reinforcing bar that stretches out supporting plate is equipped with angle bar, the side of wing plate that angle bar stretches to, hinge joint is embedded on the wing plate, with the technical effect of improving the surface performance of double T board anti-cracking.

Description

Technical Field

[0001] This utility model relates to the field of building beams, and in particular to a crack-resistant prestressed concrete double-T slab for roofs. Background Technology

[0002] With the increasing height and complexity of buildings, the design and performance of roof structures for large buildings have become one of the important issues in the construction field. Traditional roof beam structures often crack when subjected to building loads and temperature changes, which not only affects the aesthetics of the building but also reduces its durability.

[0003] T-beam structures are widely used in roofing, effectively bearing and distributing the loads of the superstructure while also resisting stress caused by temperature changes to some extent. However, traditional double-T slabs still have a significant problem in practical use: under certain temperature and stress conditions, the slabs are prone to cracking, directly affecting the structural and aesthetic stability of the beam. Utility Model Content

[0004] The purpose of this utility model is to provide a crack-resistant prestressed concrete double-T slab for roofing, which has the advantage of improving the crack-resistant structural performance of the double-T slab.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a crack-resistant prestressed concrete double-T slab for roofing, comprising a horizontal top slab and a vertical beam, wherein the vertical beam is arranged along the length direction of the horizontal top slab, and the horizontal top slab and the vertical beam are movably connected, characterized in that: a pair of clamping slots for clamping and installing the vertical beam are symmetrically provided at the bottom of the horizontal top slab; the horizontal top slab includes a support plate and wing plates movably assembled with both sides of the support plate; the sides of the support plate and the wing plates opposite each other are respectively provided with clamping blocks and clamping slots; the clamping blocks and clamping slots on the support plate and the wing plates are spaced apart; each clamping block and clamping slot is provided with a through groove; and intelligent steel strands are respectively threaded through the through grooves. The through-slot is also filled with non-shrink mortar. The side of the horizontal top plate is equipped with a control module that works with the intelligent steel strand. The top of the support plate and the wing plate is equipped with a cast-in-place layer. The top of the support plate is equipped with several reinforcing ribs. The end of the reinforcing rib extending out of the support plate is equipped with a bend rib. The bend rib extends to one side of the wing plate. Several hinge joints are pre-embedded on the wing plate. Several tie ribs are pre-embedded on the top of the wing plate. The end of the tie rib extending out of the wing plate is equipped with a horizontal tie rib facing one side of the support plate. Fastening rib heads are pre-embedded on the support plate. The top of the vertical beam is equipped with an I-shaped block. The beam clamping slot is I-shaped. The support plate is equipped with a fastening expansion bolt rod. Both the I-shaped block and the beam clamping slot are equipped with fastening vertical grooves.

[0006] Furthermore: the intelligent steel strand is a sensing steel strand and a galvanized steel strand, and the control module includes an optical fiber signal receiving block connected to the sensing steel strand, an electric servo motor for driving the tension of the galvanized steel strand, and a control box.

[0007] Furthermore, the continuous through slots on the multiple support plates and wing plates are arranged in an arc-shaped path.

[0008] Furthermore: the side of the wing plate is a chamfered beveled block, and multiple reinforcing blocks are evenly provided on the chamfered beveled block.

[0009] Furthermore, the wing plate is provided with a baffle on the side away from the support plate, and the baffle is provided with water-permeable holes.

[0010] Furthermore, the cast-in-place layer incorporates polymer fibers and high-efficiency water-reducing agents.

[0011] Furthermore, the cast-in-place layer is also provided with a reinforcing steel mesh, which is wavy in shape.

[0012] Furthermore: the vertical beam is provided with stress-absorbing blocks inside, and the multiple stress-absorbing blocks are connected by cross-ribs.

[0013] Furthermore, a diagonal reinforcing bolt is provided between the wing plate and the support plate.

[0014] In summary, this utility model has the following beneficial effects: By using a split horizontal top plate layout design and a cast-in-place layer processing structure, the local and overall tensile and deformation strength can be improved while effectively absorbing the internal deformation stress of the plate and reducing the cracking phenomenon that may occur when directly acting on the plate surface. The structural design of the cast-in-place layer combines the strength framework of reinforced steel mesh and reinforcing bars, adopts the construction method of on-site casting, and incorporates polymer fibers and high-efficiency water-reducing agents to ensure reliable molding quality and improve the crack resistance of the slab surface. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram used to illustrate the double-T plate structure in the embodiment; Figure 2 This is a partial cross-sectional schematic diagram used to show the distribution location of the through slots in the embodiment; Figure 3 This is a schematic diagram showing a partial cross-sectional view of the vertical beam in the embodiment.

[0016] Reference numerals: 1. Horizontal top plate; 2. Vertical beam; 3. Beam slot; 4. Support plate; 5. Wing plate; 6. Locking block; 7. Locking slot; 8. Through slot; 9. Cast-in-place layer; 10. Reinforcing bar; 11. Corner bar; 12. Hinge joint; 13. Tie bar; 14. Horizontal tie bar; 15. Fastening bar head; 16. I-shaped block; 17. Pre-embedded fastening expansion bolt rod; 18. Fastening vertical slot; 19. Sensing steel strand; 20. Galvanized steel strand; 21. Fiber optic signal receiver block; 22. Electric servo motor; 23. Control box; 24. Chamfered bevel block; 25. Reinforcing block; 26. Edge retainer; 27. Reinforcing steel mesh; 28. Stress-absorbing block; 29. ​​Cross bar; 51. Diagonal reinforcing bolt. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Example: A type of crack-resistant prestressed concrete double-T slab for roofing, such as... Figure 1 As shown, the structure includes a horizontal top plate 1 and a vertical beam 2. The vertical beam 2 is positioned along the length of the horizontal top plate 1, and the horizontal top plate 1 and the vertical beam 2 are movably connected. A pair of clamping grooves 3 are symmetrically provided at the bottom of the horizontal top plate 1 for the vertical beam 2 to be clamped and installed. An I-shaped block 16 is provided at the top of the vertical beam 2. The clamping grooves 3 are I-shaped. This I-shaped structure solves the problem of stress concentration and cracking under load in existing double-T slabs where the right-angle connection between the horizontal top plate 1 and the vertical beam 2 leads to cracking under load. The I-shaped block 16, embedded in the clamping groove 3, effectively disperses localized stress concentration over a wider area, significantly reducing stress peaks and suppressing cracking. Simultaneously, a fastening expansion bolt rod 17 is embedded in the support plate 4, and both the I-shaped block 16 and the clamping groove 3 have fastening vertical grooves 18. The cooperation between the pre-embedded fastening expansion bolt rod 17 and the fastening vertical grooves 18 ensures a stable connection between the horizontal top plate 1 and the vertical beam 2.

[0019] Considering the large-scale application of existing long-distance, wide-width slab beams, the horizontal top slab 1 of this double-T slab is a split structure, including a support plate 4 and wing plates 5 that are movably assembled with both sides of the support plate 4. After being flexibly hoisted and transported to the construction and installation site, the surface structural layer of the horizontal top slab 1 is cast-in-place. The sides of the support plate 4 and the wing plates 5 are respectively provided with locking blocks 6 and locking slots 7. The locking blocks 6 and locking slots 7 on the support plate 4 and the wing plates 5 are spaced apart to allow for horizontal staggered insertion and fixing. The sides of the wing plates 5 are chamfered beveled blocks 24, and multiple reinforcing blocks 25 are evenly provided on the chamfered beveled blocks 24 to ensure the overall load-bearing stability of the horizontal top slab 1 after assembly. Diagonal reinforcing bolts 51 are also provided between the wing plates 5 and the support plate 4. The diagonal reinforcing bolts 51 are spaced apart to further improve the connection strength of the split beam structure.

[0020] Meanwhile, both the card block 6 and the card slot 7 are provided with through slots 8, and the continuous through slots 8 on multiple support plates 4 and wing plates 5 are arranged in an arc-shaped path (e.g. Figure 2 As shown, intelligent steel strands are threaded through the through groove 8 and non-shrink mortar is poured to achieve the through arrangement of intelligent steel strands. The arc-shaped layout realizes the overall tensile strength of the intelligent steel strands in the length direction and improves the connection between the wing plate 5 and the support plate. A control module that works in conjunction with the intelligent steel strand is provided on the side of the horizontal top plate 1. Considering the inconvenience of monitoring the internal stress of existing concrete slabs, the intelligent steel strand consists of a sensing steel strand 19 and a galvanized steel strand 20, which are respectively threaded through the through groove 8 on opposite sides. The control module is transmitted to the control module by the optical fiber sensing signal in the sensing steel strand 19. The control module includes an optical fiber signal receiving block 21 connected to the sensing steel strand 19, an electric servo motor 22 that drives the tension of the galvanized steel strand 20, and a control box 23. The control box 23 can collect and analyze the internal dynamic stress in a timely manner, which is convenient for operators to perform regular maintenance. The control box 23 controls the electric servo motor 22 to tension the galvanized steel strand 20 according to the internal stress. In particular, it is specifically designed to solve the problem that the thermal expansion and contraction effect under seasonal changes may affect the internal structure of the concrete slab, and always keep the concrete component in the optimal stress state.

[0021] After ensuring the overall stability and reliable bearing and stress conditions of the horizontal top slab 1, the surface cast-in-place layer 9 is poured. The top of the support plate 4 and the wing plate 5 are provided with the cast-in-place layer 9. In order to improve the pouring quality and overall tensile strength of the cast-in-place layer 9 and effectively improve the crack resistance, a number of reinforcing ribs 10 are provided at the top of the support plate 4. The end of the reinforcing rib 10 extending out of the support plate 4 is provided with a bend rib 11. The bend rib 11 extends towards one side of the wing plate 5. A number of hinge joints 12 are pre-embedded on the wing plate 5. During the pouring process, the construction personnel need to hinge one end of the bend rib 11 to the hinge joint 12 respectively. A number of tie ribs 13 are provided at the top of the wing plate 5. The end of the tie rib 13 extending out of the wing plate 5 is provided with a horizontal tie rib 14 facing one side of the support plate 4. The support plate 4 is pre-embedded with a fastening rib head 15. The construction personnel simultaneously tighten the horizontal tie rib 14 and the fastening rib head 15 to the other side, which effectively improves the structural strength after the concrete is poured. Meanwhile, polymer fibers and water-reducing agents are incorporated into the cast-in-place layer 9, along with the reinforced steel mesh 27. The reinforced steel mesh 27 is wavy, and the combination of the three-dimensional structure achieves a stable tensile strength and low shrinkage ratio local functional layer, thereby improving the overall tensile and strain resistance and reducing the cracking caused by the instantaneous concentration of local stress that is common in existing systems.

[0022] Considering the weak structural strength of the existing double-T plate side wing edge, the wing plate 5 is provided with a retaining edge 26 on the side away from the supporting plate 4. The retaining edge 26 and the wing plate 5 are integrally cast structures with water permeable holes inside. This ensures the stable formation of the subsequent cast-in-place layer 9 while effectively achieving good water permeability for water seeping out of the cast-in-place layer 9 during daily use, reducing the possibility of cracking caused by internal water seepage and deposition when exposed to high temperature.

[0023] Considering the immediate weakening of internal stress deformation under load and compression in the existing long-distance vertical beam 2, stress absorbing blocks 28 are installed inside the vertical beam 2 (such as...). Figure 3 As shown), the structural strength of the stress-absorbing block 28 is less than that of the surrounding concrete, but cross reinforcement 29 is used in multiple stress-absorbing blocks 28 (as shown). Figure 3 As shown, the hinge effectively releases the internal constraint stress caused by environmental temperature deformation and material shrinkage, thereby reducing the occurrence of local cracks that may be caused by undigested stress.

[0024] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A crack-resistant prestressed concrete double-T slab for roofing, comprising a horizontal top slab (1) and a vertical beam (2), wherein the vertical beam (2) is arranged along the length direction of the horizontal top slab (1), and the horizontal top slab (1) and the vertical beam (2) are movably connected, characterized in that: The bottom of the horizontal top plate (1) is symmetrically provided with a pair of clamping slots (3) for clamping and installing vertical beams (2). The horizontal top plate (1) includes a support plate (4) and wing plates (5) that are movably assembled with the two sides of the support plate (4). The sides of the support plate (4) and the wing plates (5) are respectively provided with clamping blocks (6) and clamping slots (7). The clamping blocks (6) and clamping slots (7) on the support plate (4) and the wing plates (5) are spaced apart. The clamping blocks (6) and the clamping slots (7) are provided with through slots (8). Intelligent steel strands are respectively threaded in the through slots (8). Non-shrink mortar is also poured in the through slots (8). The side of the horizontal top plate (1) is provided with a control module that cooperates with the intelligent steel strands. The top of the support plate (4) and the wing plates (5) is provided with a cast-in-place layer (9). The top of the support plate (4) is provided with several reinforcing ribs (10), and the end of the reinforcing rib (10) extending out of the support plate (4) is provided with a bend rib (11). The bend rib (11) extends toward one side of the wing plate (5). Several hinge joints (12) are pre-embedded on the wing plate (5). Several tension ribs (13) are provided at the top of the wing plate (5). The end of the tension rib (13) extending out of the wing plate (5) is provided with a horizontal tension rib (14) facing one side of the support plate (4). Fastening rib heads (15) are pre-embedded on the support plate (4). The top of the vertical beam (2) is provided with an I-shaped block (16). The beam clamping groove (3) is I-shaped. The support plate (4) is provided with a fastening expansion bolt rod (17). Both the I-shaped block (16) and the beam clamping groove (3) are provided with fastening vertical grooves (18).

2. The anti-cracking prestressed concrete double-T slab for roofing according to claim 1, characterized in that: The intelligent steel strand is a sensing steel strand (19) and a galvanized steel strand (20). The control module includes an optical fiber signal receiving block (21) connected to the sensing steel strand (19), an electric servo motor (22) for driving the galvanized steel strand (20) to tension, and a control box (23).

3. The anti-cracking prestressed concrete double-T slab for roofing according to claim 1, characterized in that: The continuous through slots (8) on the multiple support plates (4) and wing plates (5) are arranged in an arc-shaped path.

4. The anti-cracking prestressed concrete double-T slab for roofing according to claim 1, characterized in that: The side of the wing plate (5) is a chamfered bevel block (24), and a plurality of reinforcing blocks (25) are evenly provided on the chamfered bevel block (24).

5. The anti-cracking prestressed concrete double-T slab for roofing according to claim 1, characterized in that: The wing plate (5) is provided with a baffle (26) on the side away from the support plate (4), and the baffle (26) is provided with a water-permeable hole.

6. The anti-cracking prestressed concrete double-T slab for roofing according to claim 1, characterized in that: The cast-in-place layer (9) incorporates polymer fibers and high-efficiency water-reducing agents.

7. A prestressed concrete double-T slab for crack-resistant roofing according to claim 1, characterized in that: The cast-in-place layer (9) is also provided with a reinforcing steel mesh (27), which is wavy.

8. The anti-cracking prestressed concrete double-T slab for roofing according to claim 1, characterized in that: The vertical beam (2) is provided with stress absorbing blocks (28) inside, and the multiple stress absorbing blocks (28) are hinged by cross ribs (29).

9. A prestressed concrete double-T slab for crack-resistant roofing according to claim 1, characterized in that: A diagonal reinforcing bolt (51) is also provided between the wing plate (5) and the support plate (4).

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