Prefabricated laminated slab mounting node

Abstract

The utility model discloses a prefabricated laminated slab mounting node, and belongs to the field of prefabricated buildings. A prefabricated laminated slab mounting node comprises a first laminated slab and a second laminated slab, steps are arranged at the ends of the first laminated slab and the second laminated slab, bottom ribs are arranged at the bottoms of the first laminated slab and the second laminated slab and extend to the upper surfaces of the steps, stirrups are arranged at the joint of the first laminated slab and the second laminated slab and are in lap joint with the upper portions of the bottom ribs, and the stirrups are in lap joint with the upper portions of the bottom ribs. A plurality of erection ribs are arranged in the stirrups; the bottom bars extend to the upper surfaces of the steps, so that the stirrups and the bottom bars can be in lap joint, the lap joint length of the stirrups and the bottom bars is guaranteed to be larger than 300 mm, the integrity of the splicing position of the prefabricated laminated slab can be effectively improved, and the quality problem that the bearing capacity of the splicing position of the laminated slab is reduced is solved.

Description

Technical Field

[0001] This application relates to the field of prefabricated buildings, and more specifically, to a precast composite slab installation joint. Background Art

[0002] In prefabricated buildings, precast composite slabs are most widely used, and there are also various connection methods for precast composite slabs. Among them, the most common is the joint connection method. A certain width is reserved between two precast composite slabs, and the two precast composite slabs are connected together by cast-in-place concrete. This connection method is relatively cumbersome in construction. Formwork needs to be supported at the bottom of the cast-in-place joint, and steel bars also need to be tied in the joint. Its construction form is no different from that of cast-in-place construction, and it cannot reflect the advantages of prefabricated buildings.

[0003] After retrieval, the patent document with the publication number CN113027020A provides a precast floor slab installation joint and its construction method. In this patent, the steel bars vertically extend upward from the plate surface of the precast member instead of from the two side surfaces. Such a setting can avoid mold opening and reduce processes such as steel bar threading during production, greatly improving production efficiency.

[0004] In the above-mentioned prior art, at the connection between the left and right two precast members, there is a lack of effective steel bar connection, resulting in poor bearing capacity at the connection. In view of this, we propose a precast composite slab installation joint. Utility Model Content

[0005] 1. Technical Problems to be Solved

[0006] The purpose of this application is to provide a precast composite slab installation joint to solve the problems raised in the above background art.

[0007] 2. Technical Solutions

[0008] This application is achieved through the following technical solutions:

[0009] A precast composite slab installation joint includes a first composite slab and a second composite slab. Steps are provided at the ends of the first composite slab and the second composite slab. Bottom steel bars are provided at the bottoms of the first composite slab and the second composite slab, and the bottom steel bars extend to the upper surface of the steps. Stirrups are provided at the connection of the first composite slab and the second composite slab, the stirrups overlap above the bottom steel bars, and multiple erection steel bars are provided inside the stirrups.

[0010] As an optional solution of the technical solution of this application document, a sealing groove is provided at the bottom joint of two adjacent steps, and a flexible waterproof material is filled in the sealing groove.

[0011] As an optional solution of the technical solution of this application document, the cross-section of the sealing groove is triangular.

[0012] As an alternative solution to the technical solution of this application document, there are two erection bars, which are respectively located at both ends of the upper part of the stirrups.

[0013] As an alternative solution to the technical solution of this application document, there are two longitudinal bars above the lap joint of two adjacent steps. The two longitudinal bars are in an up-and-down structure and are respectively tied to the inner side of the stirrups.

[0014] As an alternative solution to the technical solution of this application document, the stirrups are arranged in a rectangular shape, and an annular part is provided in the middle of the stirrups. The two longitudinal bars are in an up-and-down structure and are respectively tied to the inside of the annular part.

[0015] As an alternative solution to the technical solution of this application document, there is a spiral bar above the lap joint of the two steps, and the spiral bar is tied to the inside of the stirrups.

[0016] As an alternative solution to the technical solution of this application document, a groove is formed on the upper surface of the step, and the bottom reinforcement is located in the groove.

[0017] As an alternative solution to the technical solution of this application document, the lap length between the bottom reinforcement and the stirrups is not less than 300 mm.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the beneficial effects of this application are as follows:

[0020] 1. In this application, by extending the bottom reinforcement to the upper surface of the step, the stirrups and the bottom reinforcement can be overlapped, and by ensuring that the lap length between the stirrups and the bottom reinforcement is greater than 300 mm, the integrity of the splicing part of the precast composite slab can be effectively increased, and the quality problem of the reduction of the bearing capacity at the splicing part of the composite slab can be avoided.

[0021] 2. In this application, by arranging a sealing groove at the splicing part of the bottom of the step and filling a flexible waterproof material in the sealing groove, the leakage of slurry during the pouring process of the precast composite slab can be effectively prevented, and the construction efficiency can be increased.

[0022] 3. This application changes the way of reinforcing bars protruding from the composite slab in the past. The form of not protruding the reinforcing bars can effectively reduce the amortization amount of the mold used for the production of the composite slab, greatly reduce the production cost of the composite slab, and has good economic benefits.

[0023] 4. In this application, an annular part and longitudinal bars are arranged at the splicing part of the step, realizing the two-way stress effect of the composite slab, ensuring the structural safety of the composite slab in the use state, and having good technical effects. Brief description of the drawings

[0024] Figure 1It is a schematic diagram of the overall structure of a precast composite slab installation node;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of a precast composite slab installation node;

[0026] Figure 3 It is a schematic diagram of the structure of the first composite slab of a precast composite slab installation node;

[0027] Figure 4 It is a schematic diagram of the cross-sectional structure of the first composite slab of a precast composite slab installation node;

[0028] In the figure: 1. The first composite slab; 2. The second composite slab; 3. The step; 301. The sealing groove; 302. The groove; 4. The bottom reinforcement; 5. The stirrup; 501. The annular part; 6. The erection reinforcement; 7. The longitudinal reinforcement. Specific implementation manners

[0029] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings.

[0030] Please refer to Figure 1 and Figure 3 , the present application provides a precast composite slab installation node, including a first composite slab 1 and a second composite slab 2. Steps 3 are provided at the ends of the first composite slab 1 and the second composite slab 2. By means of an external device, the first composite slab 1 and the second composite slab 2 are hoisted, so that the steps 3 of the first composite slab 1 and the second composite slab 2 are spliced together. A sealing groove 301 is provided at the bottom splicing of two adjacent steps 3. A 45-degree slope angle can be provided at the bottom edge of the step 3, so that the cross-section of the sealing groove 301 is triangular; and a flexible waterproof material is filled in the sealing groove 301 to prevent leakage of grout during the pouring process of the precast composite slab.

[0031] As Figure 2 and Figure 4 shown, bottom reinforcements 4 are provided at the bottoms of the first composite slab 1 and the second composite slab 2, and the bottom reinforcements 4 extend to the upper surface of the step 3; grooves 302 are formed on the upper surface of the step 3, and the bottom reinforcements 4 are located in the grooves 302; stirrups 5 are provided at the connection of the first composite slab 1 and the second composite slab 2, and the stirrups 5 overlap above the bottom reinforcements 4. The overlapping length of the bottom reinforcements 4 and the stirrups 5 is not less than 300 mm to increase the strength of the connection of the step 3.

[0032] The stirrup 5 is arranged in a rectangular shape, and a plurality of erection bars 6 are provided inside the stirrup 5, preferably two. The two erection bars 6 are respectively located at both ends of the upper part of the stirrup 5. In addition, an annular part 501 is provided in the middle of the stirrup 5. Two longitudinal bars 7 are provided above the overlapping part of two adjacent steps 3. The two longitudinal bars 7 are in an up-and-down structure and are respectively tied inside the annular part 501. The erection bars 6 and the longitudinal bars 7 are used to bear the horizontal load after the installation of the precast composite slab, so as to increase the integrity of the structure. In addition, spiral steel bars can be placed above the overlapping part of the steps 3 and tied inside the stirrup 5 to replace the annular part 501 and the longitudinal bars 7, so as to achieve the purpose of improving the construction efficiency.

Claims

1. A prefabricated composite panel installation node, characterized in that: The invention comprises a first composite plate (1) and a second composite plate (2), wherein the ends of the first composite plate (1) and the second composite plate (2) are provided with steps (3), the bottoms of the first composite plate (1) and the second composite plate (2) are provided with bottom ribs (4), the bottom ribs (4) extend to the upper surface of the steps (3), stirrups (5) are provided at the connection between the first composite plate (1) and the second composite plate (2), the stirrups (5) are overlapped above the bottom ribs (4), and a plurality of frame ribs (6) are provided inside the stirrups (5).

2. A prefabricated composite panel installation node according to claim 1, characterized in that: A sealing groove (301) is provided at the joint of the bottoms of two adjacent steps (3), and the sealing groove (301) is filled with a flexible waterproof material.

3. A prefabricated composite panel installation node according to claim 2, characterized in that: The sealing groove (301) has a triangular cross section.

4. The prefabricated composite panel installation node according to claim 1, characterized in that: The two frame bars (6) are respectively located at the two ends of the upper part of the stirrup (5).

5. The prefabricated composite panel installation node according to claim 1, characterized in that: Two longitudinal bars (7) are arranged above the overlapped part of two adjacent steps (3), and the two longitudinal bars (7) are in an upper and lower structure and are respectively tied to the inner side of the stirrups (5).

6. A prefabricated composite panel installation node according to claim 5, characterized in that: The stirrup (5) is arranged in a rectangular shape, a ring-shaped portion (501) is arranged in the middle of the stirrup (5), and the two longitudinal bars (7) are arranged in an upper and lower structure and are respectively tied inside the ring-shaped portion (501).

7. The prefabricated composite panel installation node according to claim 1, characterized in that: A spiral steel bar is provided above the overlapped portion of the two steps (3), and the spiral steel bar is tied inside the stirrup (5).

8. The prefabricated composite panel installation node according to claim 1, characterized in that: The upper surface of the step (3) is provided with a groove (302), and the bottom rib (4) is located in the groove (302).

9. The prefabricated composite panel installation node according to claim 1, characterized in that: The overlapping length of the bottom reinforcement (4) and the stirrup (5) is not less than 300 mm.

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