Prestressed ALC (autoclaved lightweight concrete) plate
By designing prestressed ALC panels and utilizing grooved-protrusion splicing and prestressed tie rod tensioning technology, the problem of cracking at the interface of ALC panel walls was solved, improving construction efficiency and wall quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAINAN YUSHI TECH CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-05
AI Technical Summary
In existing building construction, the bricklaying and plastering process for infill walls is inefficient and difficult to control in terms of quality. The joints of ALC panel walls are prone to cracking due to changes in temperature and humidity.
Prestressed ALC plates are used, and splicing is achieved by setting grooves and protrusions at both ends of the plate. Prestressed tie rods are inserted into the prestressed wire holes, and compressive stress is applied by using locking nuts. The connection stability is enhanced by combining steel mesh and adhesive.
It effectively prevents cracks at the joints of ALC boards caused by temperature and humidity changes, and improves construction efficiency as well as the integrity, seismic resistance and sound insulation of the wall.
Smart Images
Figure CN224200023U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, and in particular to a prestressed ALC slab. Background Technology
[0002] Currently, there are two main construction methods for infill walls (interior and exterior walls) in the construction industry. The first is the traditional bricklaying and plastering process, which is inefficient, labor-intensive, difficult to control in terms of quality, and results in uneven wall surfaces. The second is prefabricated ALC panel walls, which are composed of multiple individual ALC panels. The problem of cracking at the joints between the panels has remained unresolved (due to temperature and humidity changes). Therefore, we propose a prestressed ALC panel to completely solve the wall cracking problem. Utility Model Content
[0003] The purpose of this invention is to provide a prestressed ALC plate to solve the problems existing in the prior art and effectively prevent cracking at the joint of the plate and wall.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] This utility model provides a prestressed ALC slab, including a slab body and prestressed tie rods. The slab body includes a first slab body and a second slab body. The first slab body has grooves at both ends in the width direction. The second slab body has a groove at one end in the width direction and a protrusion at the other end that mates with the groove. One first slab body and several second slab bodies are sequentially spliced together through the grooves and the protrusion. A steel mesh is provided inside the slab body. Multiple prestressed wire-threading holes are spaced apart along the length direction inside the slab body. The prestressed wire-threading holes extend along the width direction of the slab body. The prestressed tie rods are inserted into the corresponding prestressed wire-threading holes in each of the spliced slab bodies and are threaded with locking nuts at both ends.
[0006] In one embodiment, a prestressed wire threading tube is provided in the prestressed wire threading hole, and the prestressed tie rod is inserted into the corresponding prestressed wire threading tube in each of the assembled plates.
[0007] In one embodiment, a steel pad is provided between the locking nut and the plate, and the steel pad is sleeved on the prestressed tie rod.
[0008] In one embodiment, the thickness of the steel pad is not less than 6 mm, and the center of the circular hole on the steel pad coincides with the center of the prestressed wire threading hole.
[0009] In one embodiment, the steel mesh is arranged in two layers within the slab and is parallel to each other.
[0010] In one embodiment, the longitudinal and transverse reinforcing bars of the steel mesh are welded and fixedly connected at their intersections.
[0011] In one embodiment, there are no fewer than three prestressed wire-threading holes, and the prestressed wire-threading holes are distributed at equal intervals.
[0012] In one embodiment, the prestressed wire-threading hole is centrally located in the thickness direction inside the plate.
[0013] In one embodiment, an adhesive is provided at the joint between two adjacent plates, the adhesive being an interface agent or cement paste.
[0014] In one embodiment, the plate thickness is 75mm to 300mm, and the prestressed tie rod diameter is 12mm to 20mm.
[0015] The present invention achieves the following technical advantages over the prior art:
[0016] The prestressed ALC slab provided by this utility model can connect multiple slabs sequentially through the grooves and protrusions at both ends of the slab, improving the stability of the connection. After the splicing is completed, prestressed tie rods are inserted into each prestressed wire hole, and locking nuts are threaded to both ends of the prestressed tie rods. The locking nuts are tightened with a torque wrench to the calculated tensile force value required by the wall. After reaching the calibrated value, the tensioning is completed, achieving the purpose of applying compressive stress to the slab. This can prevent cracks caused by temperature and humidity changes at the joints of the ALC slab. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the installation structure of the prestressed ALC plate in Embodiment 1 of this utility model;
[0019] Figure 2 This is a top view of the installation structure of the prestressed ALC plate in Embodiment 1 of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the first plate in Embodiment 1 of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the second plate in Embodiment 1 of this utility model;
[0022] Figure 5 This is a schematic diagram of the internal steel mesh of the plate in Embodiment 1 and Embodiment 2 of this utility model.
[0023] In the figure: 1-first plate, 2-second plate, 3-groove, 4-protrusion, 5-steel mesh, 6-prestressed wire threading hole, 7-prestressed tie rod, 8-locking nut, 9-steel pad. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] The purpose of this invention is to provide a prestressed ALC board to solve the problems existing in the prior art and effectively prevent cracking at the joints of wall panels.
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example
[0027] like Figures 1-5 As shown, this embodiment provides a prestressed ALC slab, mainly used in building infill walls (interior and exterior walls), including a slab body and prestressed tie rods 7. The slab body includes a first slab body 1 and a second slab body 2. The first slab body 1 has grooves 3 at both ends in the width direction. The second slab body 2 has a groove 3 at one end in the width direction and a protrusion 4 that mates with the groove 3 at the other end. One first slab body 1 and several second slab bodies 2 are sequentially spliced together through the grooves 3 and the protrusions 4. The first slab body 1 is used as an end plate during construction. In this embodiment, one first slab body is used as an end plate. Taking the first plate 1 and the two second plates 2 as examples, the two ends of the spliced wall are grooves 3 for fitting and fixing with the concrete structure. The first plate 1 and the second plate 2 are both provided with steel mesh 5. The first plate 1 and the second plate 2 are provided with multiple prestressing wire holes 6 at intervals along the length direction. The prestressing wire holes 6 extend along the width direction of the first plate 1 and the second plate 2. The prestressing tie rod 7 is inserted into the corresponding prestressing wire holes 6 in each of the spliced first plate 1 and the second plate 2, and locking nuts 8 are threaded at both ends.
[0028] The first plate 1 and several second plates 2 can be sequentially spliced and connected through the grooves 3 and protrusions 4 at both ends of the plate, improving the stability of the connection. After splicing, prestressed tie rods 7 are inserted into each prestressed wire hole 6, and locking nuts 8 are threaded to both ends of the prestressed tie rods 7. The locking nuts 8 are tightened with a torque wrench to the calculated tensile force value required for the wall. After reaching the calibrated value, the tensioning is completed, achieving the purpose of applying compressive stress to the first plate 1 and the second plate 2, thereby preventing cracks caused by temperature and humidity changes at the ALC plate interface. Both ends of the spliced wall have a groove 3 structure, allowing the locking nuts 8 to be placed in the grooves 3 without protruding, facilitating the installation and fixing of the wall.
[0029] The first plate 1, the second plate 2, and the prestressed tie rod 7 are all manufactured in a standardized factory workshop in one go. The first plate 1 and the second plate 2 can be directly installed at the construction site. The locking nut 8 is an anti-slip locking nut to prevent loosening and loss of tension. During the plate manufacturing process, columnar supports can be formed by pre-embedding inflatable bags during plate forming. After casting, the gas in the inflatable bags is released to obtain the prestressed wire threading hole 6. Alternatively, the prestressed wire threading hole 6 can be obtained by drilling holes in the plate after casting.
[0030] In this embodiment, a steel pad 9 is provided between the locking nut 8 and the first plate 1 and the second plate 2, and the steel pad 9 is sleeved on the prestressed tie rod 7. The steel pad 9 increases the pressure application area and avoids stress concentration in the first plate 1 and the second plate 2. The strength of the steel pad 9 should be sufficient to prevent deformation when force is applied.
[0031] In this embodiment, the thickness of the steel pad 9 is not less than 6mm, and the center of the circular hole on the steel pad 9 coincides with the center of the prestressed wire threading hole 6.
[0032] In this embodiment, the steel mesh 5 is arranged in two layers within the first plate 1 and the second plate 2, and is parallel to each other, to ensure the structural strength of the first plate 1 and the second plate 2.
[0033] In this embodiment, the longitudinal and transverse reinforcing bars of the steel mesh 5 are welded and fixedly connected at the intersection to ensure the structural stability of the steel mesh 5.
[0034] The prestressing wire threading hole 6 is no less than three. In this embodiment, the prestressing wire threading hole 6 is set to three, and the prestressing wire threading holes 6 are evenly distributed. By inserting multiple prestressing tie rods 7, pressure is applied to multiple places in the panel wall to ensure the uniformity of stress in all parts of the ALC panel, thereby better preventing cracks from occurring at the joints of the ALC panel due to temperature and humidity changes.
[0035] In this embodiment, the prestressed wire threading hole 6 is centrally located in the thickness direction inside the first plate 1 and the second plate 2 to improve structural stability.
[0036] In this embodiment, adhesive is provided at the joints of the two adjacent panels (the joint between the first panel 1 and the second panel 2, and the joint between two adjacent second panels 2). Adhesive is also provided at the joint surfaces of the first panel 1 and the second panel 2 with the concrete structure. The adhesive is an interface agent or cement paste, but is not limited to the above two materials. Specifically, cement paste is used in this embodiment. Cement paste serves to fill gaps and bond the wall panels, thereby improving the integrity and sound insulation of the wall.
[0037] The thickness of the first plate 1 and the second plate 2 is 75mm~300mm. The length of the first plate 1 and the second plate 2 is the same as the height of the room wall, and the width is 600mm. In actual construction, they can be cut as needed for door and window openings. The diameter of the prestressed tie rod 7 is 12mm~20mm. The through-wire tie rod is selected based on the thickness and length of the wall at the construction site to meet the tensile stress requirements. Example
[0038] This embodiment provides a prestressed ALC slab, which differs from Embodiment 1 in that each prestressing wire-threading hole 6 is equipped with a prestressing wire-threading embedded tube, and the prestressing tie rod 7 is inserted into the corresponding prestressing wire-threading embedded tube in each assembled slab. During slab fabrication, the prestressing wire-threading embedded tube is pre-embedded, and then casting is performed, making the fabrication convenient and quick.
[0039] The prestressed ALC slab provided by this utility model not only improves the process standards and construction efficiency, but also enhances the integrity, seismic resistance, and sound insulation of building walls, directly eliminating the potential for cracks to occur at the joints of the wall panels due to temperature and humidity changes.
[0040] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A prestressed ALC slab, characterized in that: The device includes a plate and prestressed tie rods. The plate includes a first plate and a second plate. The first plate has grooves at both ends in the width direction, and the second plate has a groove at one end in the width direction and a protrusion at the other end that mates with the groove. One first plate and several second plates are sequentially spliced together through the grooves and the protrusion. The plate contains a steel mesh. The plate contains multiple prestressed wire-threading holes spaced apart along its length direction. The prestressed wire-threading holes extend along the width direction of the plate. The prestressed tie rods are inserted into the corresponding prestressed wire-threading holes in each of the spliced plates and are threaded with locking nuts at both ends.
2. The prestressed ALC slab according to claim 1, characterized in that: The prestressed wire threading hole is provided with a prestressed wire threading tube, and the prestressed tie rod is inserted into the corresponding prestressed wire threading tube in each of the spliced plates.
3. The prestressed ALC slab according to claim 1, characterized in that: A steel pad is provided between the locking nut and the plate, and the steel pad is sleeved on the prestressed tie rod.
4. The prestressed ALC slab according to claim 3, characterized in that: The thickness of the steel pad is not less than 6mm, and the center of the circular hole on the steel pad coincides with the center of the prestressed wire threading hole.
5. The prestressed ALC slab according to claim 1, characterized in that: The steel mesh is arranged in two layers within the slab and is parallel to each other.
6. The prestressed ALC slab according to claim 1, characterized in that: The longitudinal and transverse reinforcing bars of the steel mesh are welded and fixed at their intersections.
7. The prestressed ALC slab according to claim 1, characterized in that: There are no fewer than three prestressed wire-threading holes, and each prestressed wire-threading hole is distributed at equal intervals.
8. The prestressed ALC slab according to claim 1, characterized in that: The prestressed wire-threading hole is centrally located in the thickness direction inside the plate.
9. The prestressed ALC slab according to claim 1, characterized in that: An adhesive is provided at the joint between two adjacent plates, and the adhesive is an interface agent or cement paste.
10. The prestressed ALC slab according to claim 1, characterized in that: The thickness of the plate is 75mm to 300mm, and the diameter of the prestressed tie rod is 12mm to 20mm.