Assembly type prefabricated part connecting structure

Abstract

The utility model discloses an assembly type prefabricated part connecting structure which comprises two adjacent prefabricated parts, and the two prefabricated parts are provided with two half-kidney-shaped grooves. A connecting piece is accommodated in the two half-waist-shaped grooves; the connecting piece comprises two side arc steel plates, corrugated steel plates are welded to the two side arc steel plates, a front rubber cushion layer and a rear rubber cushion layer wrap the corrugated steel plates, and a front straight steel plate and a rear straight steel plate are arranged in front of and behind the two rubber cushion layers; a plurality of layers of lifting assemblies are arranged on the connecting piece at intervals, and each layer comprises four groups of lifting assemblies; each lifting assembly comprises a W-shaped steel plate, and the W-shaped steel plates are welded to the side arc steel plates and the straight steel plates. The W-shaped steel plates in the same row are jointly connected with a W-shaped water stop pad; a supporting plate is welded to the inner side of each W-shaped steel plate, an inner nut is welded to each supporting plate, and a screw used for lifting the inner nuts and the W-shaped steel plates to enable the W-shaped steel plates to abut against the W-shaped water stop pads and the corresponding grooves is screwed into the inner nuts. And the screw rod penetrates through the surface of the prefabricated part from the groove, and a locking nut is screwed at the outer end of the screw rod. The connecting structure is high in water stopping performance.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building construction technology, specifically a connection structure for prefabricated building components. Background Technology

[0002] Prefabricated modular construction refers to a construction method in which some or all of the building components are prefabricated in a factory and transported to the construction site for assembly, forming a functional building. Compared with on-site construction, prefabricated modular construction has advantages such as convenient construction, faster project progress, less impact on the surrounding environment, and easier assurance of the quality of building components. With the acceleration of urbanization in my country, prefabricated modular construction has gained increasing promotion and application.

[0003] Currently, adjacent precast components are generally connected using a combination of bolts and sealing strips. Taking two adjacent precast wall panels as an example, the two adjacent sides of the two wall panels are splicing surfaces, connected by horizontal bolts, with a vertical sealing strip clamped between the two splicing surfaces to meet the connection requirements for waterproofing and load bearing. However, the above-mentioned bolt-and-sealing-strip connection structure generally has a drawback: during long-term service of the building, the components may shift or move due to bearing different loads over time. Again, taking two adjacent precast wall panels as an example, since they share a common foundation, vertical shifts are generally unlikely, but horizontal shifts or lateral shifts may occur, causing them to move away from each other. Once a small horizontal shift or shift occurs, the bolts can easily be pulled apart and the sealing strip can loosen and fail, leading to water leakage at the joints between adjacent components. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a prefabricated component connection structure with strong water-stopping performance.

[0005] The technical solution of this utility model is to provide a prefabricated component connection structure, which includes two adjacent prefabricated components. The two splicing surfaces of the two prefabricated components are symmetrically provided with two semi-waist-shaped grooves extending along the joint length. Each semi-waist-shaped groove has a front groove and a rear groove on its front and rear side walls, respectively.

[0006] Two semi-waist-shaped grooves jointly accommodate a connector with a waist-shaped cross-section; the connector includes two side-arc steel plates, and the two side-arc steel plates are welded together with a corrugated steel plate. The corrugated steel plate is wrapped with two rubber pads at the front and back. The two rubber pads are provided with two straight steel plates at the front and back. The aforementioned side-arc steel plates, corrugated steel plates, and straight steel plates are all arranged along the entire length; the connector is provided with multiple layers of lifting components at intervals; each layer of lifting components consists of four sets, corresponding one-to-one with the two front grooves and two rear grooves;

[0007] Each lifting assembly includes a W-shaped steel plate, with its two ends welded to a side arc steel plate and a straight steel plate, respectively. All W-shaped steel plates in the same row are connected to a W-shaped water-stop pad on their outer sides. A support plate is welded to the inner side of each W-shaped steel plate, and an inner nut is welded to the support plate. The inner nut is screwed onto a screw rod used to lift the inner nut and the W-shaped steel plate so that the W-shaped steel plate presses the W-shaped water-stop pad against the corresponding groove. The screw rod passes through the groove to the surface of the precast component, and a locking nut is screwed onto the outer end of the screw rod.

[0008] Compared with existing technologies, the above-mentioned prefabricated component connection structure has the following advantages.

[0009] This connection structure is easy to assemble. After hoisting a prefabricated component, half of the connector is inserted into the semi-waist-shaped groove of the component. Then, another prefabricated component is hoisted and the other half of the connector is inserted into the semi-waist-shaped groove of the subsequent component. Then, the workers pull and assemble each set of lifting components one by one on the front and rear surfaces of the component. Specifically, the surface of the prefabricated component has through holes corresponding to each lifting component. The through holes extend from the surface of the component to four grooves. The workers insert the screw of each lifting component through the corresponding through hole into the groove and tighten it with the inner nut of the same component. Then, using tools such as pry bars or jacks, the screw is pulled outward. The inner nut pulls the W-shaped steel plate of the component outward into an inverted U-shaped steel plate. The inverted U-shaped steel plate is inserted into the corresponding groove, and at the same time, the W-shaped water-stop pad is pressed against the corresponding groove. Of course, at this time, the W-shaped water-stop pad is also pushed up into an inverted U-shaped water-stop pad. Then, the workers screw down the locking nut to make it press against the surface of the component, thereby locking the screw after lifting and preventing it from retracting. In this way, a four-point clamping constraint is formed at certain heights, that is, at the section where each lifting component is located. This four-point clamping method ensures a firm and reliable connection between the connector and the two adjacent components. Furthermore, at certain heights, an inverted U-shaped steel plate presses the entire length of the inverted U-shaped water-stop pad against the corresponding groove wall, thus cutting off the seepage path. When water on the component surface extends along the joint into the straight steel plate of the connector and then moves laterally to the groove, it is completely blocked by the tightly pressed inverted U-shaped water-stop pad, resulting in good waterproofing and seepage prevention. The side arc steel plates and straight steel plates surrounding the connector effectively ensure the connector's own strength, ensuring it can withstand sufficient loads. Moreover, even if the component shifts or misaligns during long-term service, leading to... The joints between components widen, but the corrugated steel plates of the connectors are elastic and ductile, allowing them to expand and contract accordingly, ensuring continuous waterproofing. The four-point clamping connection waterproofing structure is not affected by the lateral movement of the components, thus continuously guaranteeing the waterproofing performance of the component connection. In other words, the normal lateral movement of the connectors does not exceed the range of the breaking strength of the straight steel plate, and this connection structure can continuously withstand the waterproofing force. Furthermore, the front and rear rubber pads can cover and protect the corrugated steel plates, improving the waterproofing performance. The rubber pads also have ductility and elasticity, making them suitable for the lateral movement of precast components.

[0010] Preferably, the outer end of the screw is screwed with a reinforcing nut for locking the pry bar opening. The reinforcing nut is located outside the locking nut. This makes it easy for workers to hold the pry bar, use the pry bar opening to lock the reinforcing nut, and pry outwards to pull up the screw. Of course, if a bolt is used instead of the screw, and the bolt head is locked with a pry bar, the bolt and the inverted U-shaped steel plate can also be pried outwards. However, using a screw and a reinforcing nut has another advantage: after the screw is pulled into place and the locking nut is tightened downwards to press against the surface of the component, the reinforcing nut can still be tightened downwards to press against the locking nut, achieving double insurance with double nut locking. This completely locks the screw along the height, improving the strength and firmness of the four-point clamping water stop.

[0011] As a further optimization, two reinforcing steel plates are welded between each side arc steel plate and the corrugated steel plate, and each rubber pad layer includes a central corrugated rubber pad block and two fan-shaped rubber pad blocks on both sides; in this way, the strength of the two sides of the connector can be strengthened, making it more tightly connected to the two semi-waist-shaped grooves, and the load-bearing performance is stronger.

[0012] As an alternative, an annular washer is fitted onto the outer end of the screw. When the screw is pulled up, the locking nut presses the annular washer tightly onto the surface of the precast component. In this way, when the screw is pulled into place and the locking nut is tightened, the locking nut presses the annular washer against the surface of the precast component simultaneously, completely eliminating the risk of water leakage from the gap between the screw and the through-hole wall. Moreover, this structure is easy to disassemble, and bolts and connectors can be easily replaced during later maintenance. Of course, if the annular washer is not used, and waterproof glue is filled into the gap between the screw and the through-hole wall after the screw is pulled into place, the seepage path can also be blocked. However, the waterproof glue will stick to the screw, making it difficult to disassemble and inconvenient for later maintenance and replacement of the screw and connectors. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the prefabricated component connection structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the prefabricated component on one side and a W-shaped waterstop after disassembly of the prefabricated component connection structure of this utility model.

[0015] Figure 3 This is a top view of the lifting assembly of the prefabricated component connection structure of this utility model after it has been lifted.

[0016] The diagram shows: 1. Precast component; 2. Semi-waisted groove; 3. Front groove; 4. Rear groove; 5. Side arc steel plate; 6. Corrugated steel plate; 7. Straight steel plate; 8. Reinforcing steel plate; 9. Corrugated rubber pad; 10. Fan-shaped rubber pad; 11. W-shaped steel plate; 12. W-shaped water-stop pad; 13. Support plate; 14. Inner nut; 15. Screw; 16. Locking nut; 17. Pry bar; 18. Reinforcing nut; 19. Inverted U-shaped steel plate; 20. Through hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] like Figures 1-3 As shown, the prefabricated component connection structure of this utility model includes two adjacent prefabricated components 1, such as two adjacent prefabricated wall panels, or adjacent prefabricated wall panels and prefabricated columns, or even adjacent prefabricated wall panels and prefabricated beams, etc.

[0019] Two prefabricated components 1 have two semi-waist-shaped grooves 2 symmetrically arranged on their two splicing surfaces, extending along the length of the joint. Each semi-waist-shaped groove 2 has a front groove 3 and a rear groove 4 on its front and rear side walls, respectively. In other words, the two semi-waist-shaped grooves 2 on the left and right have four grooves: left front, left rear, right front, and right rear.

[0020] Two semi-waist-shaped grooves 2 jointly accommodate a connector with a waist-shaped cross-section, which also extends along the joint length. This connector includes two side-arc steel plates 5, which are welded together to a corrugated steel plate 6. The corrugated steel plate 6 is wrapped with two rubber pads, one in front and one behind. Two straight steel plates 7 are positioned in front of and behind the two rubber pads. Two reinforcing steel plates 8 are welded between the left side-arc steel plate 5 and the corrugated steel plate 6, and similarly, two reinforcing steel plates 8 are welded between the right side-arc steel plate 5 and the corrugated steel plate 6. Each rubber pad layer includes a centrally located corrugated rubber pad 9 and two fan-shaped rubber pads 10 on either side; for example, the front rubber pad layer includes a left front fan-shaped rubber pad 10, a right front fan-shaped rubber pad 10, and a centrally located corrugated rubber pad 9. The aforementioned side-arc steel plate 5, corrugated steel plate 6, reinforcing steel plate 8, and straight steel plate 7 are all laid out along the entire length; the term "through the entire length" refers to extending along the joint length direction from the upper opening to the lower opening of the semi-waist-shaped groove 2, and being at the same height as the joint of the semi-waist-shaped groove 2 and the precast component 1.

[0021] The connector is provided with multiple layers of lifting components at intervals; in other words, the connector is provided with a layer of lifting components at certain heights along the joint length of the precast component 1. Each layer of lifting components consists of four sets, corresponding one-to-one with the two front grooves 3 and the two rear grooves 4, that is, each layer has four sets of lifting components: left front, left rear, right front, and right rear.

[0022] Before lifting, each lifting assembly includes a W-shaped steel plate 11, with its two ends welded to a side-arc steel plate 5 and a straight steel plate 7, respectively. All W-shaped steel plates 11 in the same column share a common W-shaped water-stop pad 12 on their outer sides; for example, all W-shaped steel plates 11 of all left-front lifting assemblies are arranged in a vertical column and share a common left-front W-shaped water-stop rubber pad. A support plate 13 is welded to the inner side of each W-shaped steel plate 11, and an inner nut 14 is welded to this support plate 13. The inner nut 14 is screwed onto a screw rod 15 for lifting the inner nut 14 and the W-shaped steel plate 11 so that the W-shaped steel plate 11 presses the W-shaped water-stop pad 12 against the corresponding groove. The surface of the prefabricated component 1 has through holes 20 corresponding to each lifting assembly. The screw rod 15 passes through the corresponding groove along the corresponding through hole 20 to the surface of the prefabricated component 1, and a locking nut 16 is screwed onto the outer end of the screw rod 15. The outer end of the screw 15 is screwed with a reinforcing nut 18 for locking the pry hole of the pry bar 17. The reinforcing nut 18 is located outside the locking nut 16. The outer end of the screw 15 is also fitted with an annular washer, which is located inside the locking nut 16. Before lifting, the middle section of the W-shaped steel plate 11 is flush with or even recessed within the outline of the connector, so that the connector can be inserted into the semi-waisted groove 2. After the worker pries up the inner nut 14 with the pry bar 17, it will cause the W-shaped steel plate 11 to expand outward to form an inverted U-shaped steel plate 19. The inverted U-shaped steel plate 19 protrudes outward from the outline of the connector, thereby locking into the corresponding groove and pressing the corresponding W-shaped water-stop pad 12 against it. Of course, at this time, the W-shaped water-stop pad 12 is also pushed upward and becomes an inverted U-shaped water-stop pad. After lifting, the worker first tightens the locking nut 16 to press it against the surface of the precast component 1 and press the annular rubber washer, and then tightens the reinforcing nut 18 to press it against the locking nut 16, forming a double insurance.

[0023] To further enhance the strength and water-stopping performance of this connector, the W-shaped steel plate 11 can also be made to be continuous. This can be understood as connecting the various W-shaped steel plates 11 in the same column into a single unit. In this way, the lifting components in the same column share the continuous W-shaped steel plate 11, but each lifting component still retains its own individual screw 15, inner nut 14, and support plate 13. Although this would make prying up the W-shaped steel plate 11 more laborious, the problem of the difficult prying and lifting of the screw 15 can be completely solved by using hydraulic tools such as a through-hole jack instead of the pry bar 17, thereby achieving greater strength and a better water-stopping effect.

[0024] Of course, the connectors in this application also have a service limit. When the displacement or lateral shift of the precast component exceeds the breaking strength of the straight steel plate 7, such as in the event of a strong earthquake that completely tears the straight steel plate, the connector will also fail. However, before the lateral displacement of the component is small and reaches the breaking strength, the connector will continue to perform its functions of water sealing and load bearing. Therefore, the construction party can thicken the straight steel plate according to the site conditions to increase its breaking strength and extend its service limit. Compared with the existing technology where the water sealing connection fails even with a small displacement, the connection structure of this application has obvious advantages.

Claims

1. A fabricated precast component connection structure comprising two adjacent precast components, characterised in that: The two splicing surfaces of the two precast components are symmetrically provided with two semi-waist-shaped grooves extending along the length of the joint, and each semi-waist-shaped groove has a front groove and a rear groove on its front and rear side walls, respectively. Two semi-waist-shaped grooves jointly accommodate a connector with a waist-shaped cross-section; the connector includes two side-arc steel plates, and the two side-arc steel plates are welded together with a corrugated steel plate. The corrugated steel plate is wrapped with two rubber pads at the front and back. The two rubber pads are provided with two straight steel plates at the front and back. The aforementioned side-arc steel plates, corrugated steel plates, and straight steel plates are all arranged along the entire length; the connector is provided with multiple layers of lifting components at intervals; each layer of lifting components consists of four sets, corresponding one-to-one with the two front grooves and two rear grooves; Each lifting assembly includes a W-shaped steel plate, with its two ends welded to a side arc steel plate and a straight steel plate, respectively. All W-shaped steel plates in the same row are connected to a W-shaped water-stop pad on their outer sides. A support plate is welded to the inner side of each W-shaped steel plate, and an inner nut is welded to the support plate. The inner nut is screwed onto a screw rod used to lift the inner nut and the W-shaped steel plate so that the W-shaped steel plate presses the W-shaped water-stop pad against the corresponding groove. The screw rod passes through the groove to the surface of the precast component, and a locking nut is screwed onto the outer end of the screw rod.

2. The fabricated precast component connection structure according to claim 1, characterized in that: The outer end of the screw is screwed with a reinforcing nut for locking the pry bar opening; the reinforcing nut is located outside the locking nut.

3. The fabricated precast component connection structure according to claim 1, wherein: Two reinforcing steel plates are welded between each side arc steel plate and the corrugated steel plate. Each rubber pad layer includes a central corrugated rubber pad block and two fan-shaped rubber pad blocks on both sides.

4. The fabricated precast component connection structure according to claim 1, characterized in that: An annular washer is fitted onto the outer end of the screw. When the screw is pulled up, the locking nut presses the annular washer onto the surface of the precast component.

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