Prefabricated gypsum wallboard connection node structure and construction method

Abstract

According to the prefabricated gypsum wallboard connecting joint structure, reliable connection between the wallboards and the main body structure is achieved through the welding pieces, horizontal constraint is formed by the key grooves and the tie bars, and effective transmission of vertical loads is achieved in combination with the bedding layer. The invention further provides a construction method of the prefabricated gypsum wallboard connection joint structure, and the strength, the waterproof performance and the construction efficiency of the gypsum wallboards are improved by optimizing damp-proof treatment, reinforcement design, a connection mode and a construction process. The method is suitable for construction application of the fabricated internal partition wall and has a wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building structures, and particularly to a connection node structure for precast gypsum wall panels.

[0002] The present invention also relates to a construction method for a connection node structure of precast gypsum wall panels. Background Art

[0003] In construction projects, gypsum wall panels are widely used due to their advantages such as light weight, environmental protection, and convenient construction. However, traditional gypsum wall panels are prone to moisture damage in humid environments (such as kitchens and bathrooms), and there are certain limitations in their connection methods, reinforcement design, and construction techniques, resulting in problems such as insufficient wall strength, poor waterproof performance, and low construction efficiency.

[0004] Application No.: CN202110631847.X relates to the technical field of wall panels, and particularly to a prefabricated phosphogypsum composite wall panel and its prefabrication method. The prefabricated phosphogypsum composite wall panel includes: an outer formwork layer and a plurality of connecting members arranged in the outer formwork layer, and phosphogypsum is filled in the space between the outer formwork layer and the connecting members to form an inner wall panel layer. In the composite wall body of the embodiment of the present invention, concrete and phosphogypsum are combined, and the connecting members assist in supporting. While reducing the self-weight of the wall by phosphogypsum, the heat insulation, sound insulation, fireproof and moisture-proof performance of the wall is improved; the load-bearing and flexural resistance performance of the wall is enhanced through the concrete outer formwork layer and the connecting members, and it is applicable to both the exterior walls of frame structures and low-rise buildings and the interior partition walls, with wide applicability. The present invention also provides a prefabrication method for a prefabricated phosphogypsum composite wall panel. Through this method, the required wall bodies can be produced in advance in the project, which can simplify the on-site construction procedures and thus shorten the construction period.

[0005] However, the prefabricated phosphogypsum composite wall panel in the above patent technology cannot be applied to the connections of various building structures, nor does it provide an installation method for precast gypsum wall panels. Therefore, there is an urgent need for a new type of gypsum wall panel and its construction method to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a connection node structure for precast gypsum wall panels to solve the problems raised in the above background art:

[0007] (1) How to overcome the problems of insufficient reliability of node connections and low construction efficiency existing in existing precast gypsum wall panels.

[0008] The purpose of the present invention is to provide a construction method for a connection node structure of precast gypsum wall panels to solve the problems raised in the above background art:

[0009] (1) How to be applicable to the rapid construction of non-load-bearing interior partition walls in high-rise buildings, and improve the integrity and seismic performance of the walls by optimizing the joint structure and construction process.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A connection joint structure for precast gypsum wall panels;

[0012] The precast gypsum wall panel includes a wall panel body and a mortar bedding layer. A plurality of positioning steel bars are fixedly connected to the upper end surface of the wall panel body. A plurality of tie bars are embedded in the wall panel body, and the end portions of the plurality of tie bars respectively extend out of the outer sides of the two side walls of the wall panel body. The bottom of the wall panel body is fixed to the floor through the mortar bedding layer. A plurality of embedded lifting points are provided on the end surface of the wall panel body.

[0013] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0014] Further, the distance between adjacent positioning steel bars is not greater than 1500 mm.

[0015] Further, when the precast gypsum wall panel is connected to the cast-in-place beam at the top, the positioning steel bars are anchored into the cast-in-place beam.

[0016] Further, when the precast gypsum wall panel is connected to the precast beam at the top, the positioning steel bars of the wall panel body are anchored into the reserved through holes of the precast beam, and the reserved through holes are filled with concrete.

[0017] Further, when the precast gypsum wall panel is connected to the cast-in-place slab at the top, the positioning steel bars of the wall panel body are bent and anchored into the cast-in-place slab.

[0018] Further, when the precast gypsum wall panel is connected to the precast composite slab and the cast-in-place layer of the composite slab at the top, the positioning steel bars are anchored into the reserved through holes of the precast composite slab and then bent and anchored into the cast-in-place layer of the composite slab, and then the reserved through holes are filled with concrete.

[0019] Further, a plurality of key grooves are respectively provided on the two side walls of the wall panel body, and the tie bars are connected to the cast-in-place concrete on both sides of the wall panel body.

[0020] Further, when the bottom of the wall panel body is matched with the floor, the mortar bedding layer adopts 1:3 cement mortar, and the joint filling, plastering and component repair adopt the supporting special gypsum mortar.

[0021] Further, when the precast gypsum wall panel is used in a humid environment, a concrete waterproof turning edge is provided at the lower end, the width is the same as that of the wall panel body, and the height is not less than 200 mm.

[0022] After adopting such a structure, in the precast gypsum wallboard connection joint structure, the precast gypsum wallboard uses steel plates welded to positioning steel bars and double-sided tie bars to work together. Among them, the 200-mm-thick wallboard is equipped with Ф12 positioning steel bars (spacing ≤ 1500 mm), and the 120-mm-thick wallboard is equipped with Ф10 positioning steel bars (spacing ≤ 1200 mm). Each board is provided with no less than 2 anchoring points. A 10-mm-deep keyway is set on the side of the wallboard, which cooperates with the double-sided Ф6@500-mm tie bars to form a mechanical biting effect, and the length of the protruding bars meets the requirements of seismic anchorage length. The bottom is seated with 1:3 cement mortar to ensure the vertical positioning accuracy, and the joint treatment uses special gypsum mortar to achieve micro-expansion sealing.

[0023] This precast gypsum wallboard connection joint structure realizes the reliable connection between the wallboard and the main structure through welded parts. The keyway and the tie bars form horizontal constraints, and the vertical load is effectively transmitted in combination with the seating layer.

[0024] To achieve the above object, the present invention also provides the following technical solutions:

[0025] A construction method for a precast gypsum wallboard connection joint structure as described above includes the following steps:

[0026] Step a) Installation preparation, cleaning the bonding surface between the gypsum wallboard and the post-cast concrete;

[0027] Step b) Seating layer construction, using 1:3 cement mortar, measuring the elevation and placing steel gaskets;

[0028] Step c) Wallboard installation, when the precast gypsum wallboard component is lifted, it is vertical and stable, and slowly positioned when it falls to 0.5 meters above the installation position. Align and straighten the precast gypsum wallboard component to ensure it coincides with the pre-drawn control lines;

[0029] Step d) Installing inclined supports, after the precast gypsum wallboard is stable, install and fix the inclined supports. Each wallboard is provided with no less than 2 rows of inclined supports. The upper row of inclined supports is located at 2 / 3 of the precast gypsum wallboard, and the included angle between the support and the horizontal line is between 45° and 60°;

[0030] Step e) Wallboard checking, using the fine-tuning function of the inclined support to adjust the verticality of the precast gypsum wallboard. The inclined supports are uniformly fixed on one side of the precast gypsum wallboard, leaving a passageway;

[0031] Step f) Binding the steel bars of the post-cast strip, first place the stirrup rings of the post-cast strip, then place the vertical main steel bars, bind the reserved main steel bars of the lower layer with the main steel bars of this layer, and bind the horizontal stirrups with the main steel bars and the reserved horizontal ring steel bars of the precast gypsum wallboard;

[0032] Step g) Formwork support for the post-cast strip, fixed with through-wall bolts;

[0033] Step h) Decoration, using plaster of Paris for decoration, and laying alkali-resistant fiberglass mesh cloth at the joints.

[0034] The construction method of the connection node structure of this precast gypsum wallboard is applicable to the rapid construction of non-load-bearing internal partition walls in high-rise buildings, and improves the integrity and seismic performance of the wall by optimizing the node structure and construction process.

[0035] After adopting such a method, by setting a concrete waterproof upturn and applying a waterproof interface agent, the waterproof performance of the gypsum wallboard in a humid environment is significantly improved. Optimizing the reinforcement design enhances the compressive strength and seismic performance of the wallboard. Adopting the connection method of horizontal rigid connection and vertical rigid connection improves the overall stability of the precast gypsum wallboard. Standardizing the construction process improves the construction efficiency and quality and reduces the construction cost. Description of the Drawings

[0036] Figure 1 It is a schematic structural diagram of the first embodiment of the connection node structure of this precast gypsum wallboard.

[0037] Figure 2 is Figure 1 the left view of

[0038] Figure 3 It is a schematic diagram of the side connection of the precast gypsum wallboard in the first embodiment of the connection node structure of this precast gypsum wallboard.

[0039] Figure 4 It is a construction flow chart of the first embodiment of the construction method of the connection node structure of this precast gypsum wallboard.

[0040] Figure 5 It is a schematic diagram of the connection node between the precast gypsum wallboard and the top cast-in-place beam in the second embodiment of the connection node structure of this precast gypsum wallboard.

[0041] Figure 6 It is a schematic diagram of the connection node between the precast gypsum wallboard and the top precast beam in the third embodiment of the connection node structure of this precast gypsum wallboard.

[0042] Figure 7 It is a schematic diagram of the connection node between the precast gypsum wallboard and the top cast-in-place slab in the fourth embodiment of the connection node structure of this precast gypsum wallboard.

[0043] Figure 8 It is a schematic diagram of the connection node between the precast gypsum wallboard and the top precast slab in the fifth embodiment of the connection node structure of this precast gypsum wallboard.

[0044] Figure 9 It is a schematic diagram of the connection node between the precast gypsum wallboard and the floor slab in the sixth embodiment of the connection node structure of this precast gypsum wallboard.

[0045] Figure 10This is a schematic diagram of the connection node between the precast gypsum wall panel and the floor slab with a counter-camber structure in the sixth embodiment of the precast gypsum wall panel connection node structure.

[0046] Description of the reference numerals in the figure:

[0047] Precast gypsum wall panel - 100; Wall panel body - 110; Cast-in-place beam - 200; Positioning steel bars - 111; Key grooves - 112; Tie bars - 113; Embedded lifting points - 114; Bedding layer - 120; Precast beam - 300; Reserved through holes - 310; Cast-in-place slab - 400; Precast composite slab - 500; Through holes - 510; Composite slab cast-in-place layer - 600; Cast-in-place concrete - 700; L-shaped angle iron - 810; Floor slab - 800; Equal-angle iron - 820; Waterproof turning edge - 830. Specific embodiments

[0048] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0049] The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0051] Embodiment 1

[0052] Please refer to Figures 1 to 3 。

[0053] In the precast gypsum wall panel connection node structure, the precast gypsum wall panel 100 includes a wall panel body 110 and a bedding layer 120. A steel plate is welded to the upper end surface of the wall panel body 110, and two positioning steel bars 111 are welded to the steel plate (for a 200mm steel plate, Ф12 steel bars are provided, with a reserved anchorage length and a spacing not greater than 1500mm; for a 120mm plate, Ф10 steel bars are provided, with a spacing not greater than 1200mm, and each plate has no less than 2). Three embedded lifting points 114 are provided on the end surface of the wall panel body 110.

[0054] Ten tie bars 113 are embedded in the wall panel body 110, and the ends of the ten tie bars 113 extend out of the side walls of the wall panel body 110, and key slots 112 are provided at the side connection of the prefabricated gypsum wallboard 100. The side walls of the wall panel body 110 are provided with a plurality of key slots 112, and the tie bars 113 on both sides of the gypsum wallboard are 2Ф6 with a spacing of 500mm. The length of the tie bars 113 meets the seismic anchoring requirements and is connected to the cast-in-place concrete 700 on both sides of the wall panel body 110.

[0055] The bottom of the wall panel body 110 is fixed to the floor slab 800 through a mortar layer 120. When the bottom of the wall panel body 110 is matched with the floor slab 800, 1:3 cement mortar is used for mortaring, and matching special gypsum mortar is used for caulking, painting and component repair.

[0056] See also Figure 4 The construction method of the above-mentioned prefabricated gypsum wallboard connection node structure comprises the following steps:

[0057] Step a) Installation preparation: Check the strength, appearance quality and dimensional deviation of the structural concrete according to the design requirements. Check the specifications and numbers of the gypsum wallboard components, and mark the hoisting sequence according to the hoisting plan. Check the installation materials, connectors and temporary supports to ensure that they meet the design requirements. Check the specifications, quantity and position of the reserved steel bars, and clean the interface between the gypsum wallboard and the post-cast concrete;

[0058] Step b) constructing the mortar layer 120, using 1:3 cement mortar, measuring the elevation and placing steel gaskets;

[0059] Step c) Wallboard installation: The weight of the prefabricated gypsum wallboard 100 shall not exceed the lifting capacity of the lifting equipment. There shall be no less than 2 pre-embedded lifting points 114, and a safety lifting point shall be added in the middle of the wallboard with a width greater than 3700mm. The prefabricated gypsum wallboard 100 components shall be lifted vertically and steadily, and slowly dropped to 0.5 meters from the installation site. Three persons shall align and straighten the prefabricated gypsum wallboard 100 components to ensure that they are consistent with the pre-released control line;

[0060] Step d) installing the diagonal support. After the prefabricated gypsum wallboard 100 is firmly placed, the diagonal support is installed and fixed. Each wallboard is provided with no less than 2 rows of diagonal supports. The upper row of diagonal supports is located at the prefabricated gypsum wallboard 1002 / 3. The angle between the support and the horizontal line is between 45° and 60°.

[0061] Step e) checking the wallboard, using the fine-tuning function of the diagonal brace to adjust the verticality of the prefabricated gypsum wallboard 100, and the diagonal brace is uniformly fixed on one side of the prefabricated gypsum wallboard 100, leaving an aisle;

[0062] Step f) tying the post-cast strip reinforcement, first placing the post-cast strip stirrup ring, then placing the vertical main reinforcement, tying the lower reserved main reinforcement with the main reinforcement of the current layer, and tying the horizontal stirrups with the main reinforcement and the reserved horizontal ring reinforcement of the prefabricated gypsum wallboard 100;

[0063] Step g): Formwork for the post-cast strip is constructed. Plywood is used as the formwork, in combination with 60×60 wooden square timbers, and fixed with through-wall bolts. The height and cross-sectional dimensions of the formwork are strictly controlled, and the gaps are pasted with tape to prevent leakage of mortar.

[0064] Step h): Decoration and finishing are carried out. Plaster of Paris is used for decoration and finishing, and alkali-resistant fiberglass mesh cloth is laid at the joints.

[0065] The materials used in the construction method of the connection joint structure of the precast gypsum wallboard are shown in the following table:

[0066]

[0067] This joint structure can increase the seismic bearing capacity of the precast gypsum wallboard by 20%, shorten the construction period by 15%, and control the verticality deviation of the precast gypsum wallboard within 2 mm / 2 m, meeting the relevant requirements.

[0068] The construction method of the connection joint structure of the precast gypsum wallboard has been verified in actual projects. During specific implementation, parameters should be adjusted according to the actual situation of the project, and current building codes should be strictly adhered to.

[0069] Example Two

[0070] Please refer to Figure 5 。

[0071] The difference between this example and Example One is only that: in this example, the precast gypsum wallboard 100 is connected to the top cast-in-place beam 200, and the positioning steel bars 111 of the precast gypsum wallboard 100 are anchored into the cast-in-place beam 200.

[0072] Example Three

[0073] Please refer to Figure 6 。

[0074] The difference between this example and Example One is only that: in this example, the precast gypsum wallboard 100 is connected to the top precast beam 300. A through-hole 510 with a diameter of 50 mm is reserved in the precast beam 300. After the positioning steel bars 111 are anchored into the reserved through-hole 310, concrete is used for filling.

[0075] Example Four

[0076] Please refer to Figure 7 。

[0077] The difference between this example and Example One is only that: in this example, the precast gypsum wallboard 100 is connected to the top cast-in-place slab 400, and the reserved positioning steel bars 111 are bent on-site and anchored into the cast-in-place slab 400.

[0078] Example Five

[0079] Please refer to Figure 8 .

[0080] The difference between this embodiment and the first embodiment is only that: in this embodiment, the precast gypsum wallboard 100 is connected to the top precast composite slab 500. The precast composite slab 500 is provided with reserved through holes 510. After the positioning steel bars 111 are anchored into the reserved through holes 510, they are bent on-site and anchored into the cast-in-place layer 600 of the composite slab, and then filled with concrete.

[0081] Embodiment Six

[0082] Please refer to Figure 9 .

[0083] The difference between this embodiment and the first embodiment is only that: the bottom of the precast gypsum wallboard 100 in this embodiment is connected to the floor slab 800. The mortar for bedding the bottom of the gypsum wallboard is 1:3 cement mortar, and the special gypsum mortar is used for caulking, plastering and repairing the components.

[0084] In the construction method of the connection joint structure of the precast gypsum wallboard in this embodiment, when installing the inclined support in step d), the lower row of inclined supports is fixed to the floor slab 800 by using L-shaped angle steel 810 to achieve positioning.

[0085] Embodiment Seven

[0086] Please refer to Figure 10 .

[0087] The difference between this embodiment and the first embodiment is only that: the precast gypsum wallboard 100 in this embodiment is applied to a humid environment.

[0088] A C20 concrete waterproof turning edge 830 is set on the floor slab 800. The width of the concrete waterproof is the same as the width of the precast gypsum wallboard 100, and the height is not less than 200 mm. The waterproof interface agent and waterproof coating are applied to the top of the gypsum wallboard. A gypsum-based special waterproof interface agent is brushed within 300 mm of the bottom of the ordinary gypsum wallboard.

[0089] In the construction method of the connection joint structure of the precast gypsum wallboard in this embodiment, when installing the inclined support in step d), the lower row of inclined supports is fixed to the floor slab 800 by using equal-angle steel 820 to achieve positioning.

[0090] The above are only seven implementation manners of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several variations and improvements can be made, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A connection node structure for precast gypsum wall panels, characterized in that: The precast gypsum wall panel (100) includes a wall panel body (110) and a mortar bedding layer (120). A plurality of positioning steel bars (111) are fixedly connected to the upper end surface of the wall panel body (110). A plurality of tie bars (113) are embedded in the wall panel body (110), and the end portions of the plurality of tie bars (113) respectively extend out of the outer sides of the two side walls of the wall panel body (110). The bottom of the wall panel body (110) is fixed to the floor slab (800) through the mortar bedding layer (120). A plurality of embedded lifting points (114) are provided on the end surface of the wall panel body (110).

2. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: The spacing between adjacent positioning steel bars (111) is not greater than 1500 mm.

3. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: When the precast gypsum wall panel (100) is connected to the cast-in-place beam (200) at the top, the positioning steel bar (111) is anchored into the cast-in-place beam (200).

4. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: When the precast gypsum wall panel (100) is connected to the precast beam (300) at the top, the positioning steel bar (111) of the wall panel body (110) is anchored into the reserved through hole (310) of the precast beam (300), and the reserved through hole (310) is filled with concrete.

5. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: When the precast gypsum wall panel (100) is connected to the cast-in-place slab (400) at the top, the positioning steel bar (111) of the wall panel body (110) is bent and anchored into the cast-in-place slab (400).

6. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: When the precast gypsum wall panel (100) is connected to the precast composite slab (500) and the composite slab cast-in-place layer (600) at the top, the positioning steel bar (111) is anchored into the reserved through hole (510) of the precast composite slab (500) and then bent and anchored into the composite slab cast-in-place layer (600), and then filled with concrete.

7. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: A plurality of key grooves (112) are respectively provided on the two side walls of the wall panel body (110), and the tie bars (113) are connected to the cast-in-place concrete (700) on both sides of the wall panel body (110).

8. The connection node structure for precast gypsum wall panels according to claim 1, characterized in that: When the bottom of the wall panel body (110) is matched with the floor slab (800), the mortar bedding layer (120) adopts 1:3 cement mortar, and the joint filling, plastering and component repair adopt the supporting special gypsum mortar.

9. The connection node structure for precast gypsum wall panels according to claim 8, characterized in that: When the precast gypsum wall panel (100) is used in a humid environment, a concrete waterproof turning edge (830) is provided at the lower end, the width is the same as that of the wall panel body (110), and the height is not less than 200 mm.

10. A construction method for the connection node structure of the precast gypsum wall panel according to any one of claims 1 to 9, comprising the following steps: Step a) Installation preparation: Clean the bonding surface between the gypsum wallboard and the post-cast concrete. Step b) Construction of the mortar bedding layer (120): Use 1:3 cement mortar, measure the elevation and place steel shims. Step c) Wallboard installation: When hoisting the precast gypsum wallboard (100) component, it should be vertical and stable. Lower it slowly to a position 0.5 meters above the installation site and then place it in position. Align and straighten the precast gypsum wallboard (100) component to ensure it coincides with the pre-drawn control lines. Step d) Installation of diagonal braces: After the precast gypsum wallboard (100) is stable, install and fix the diagonal braces. Each wallboard should be provided with no less than 2 rows of diagonal braces. The upper row of diagonal braces is located at the 2 / 3 position of the precast gypsum wallboard (100), and the angle between the brace and the horizontal line is between 45° and 60°. Step e) Wallboard alignment: Use the fine-tuning function of the diagonal braces to adjust the verticality of the precast gypsum wallboard (100). The diagonal braces are uniformly fixed on one side of the precast gypsum wallboard (100), leaving a passageway. Step f) Reinforcement binding of the post-cast strip: First, place the stirrup rings of the post-cast strip, then place the vertical main reinforcement. Bind the main reinforcement reserved in the lower layer with the main reinforcement of this layer, and bind the horizontal stirrups with the main reinforcement and the reserved horizontal ring reinforcement of the precast gypsum wallboard (100). Step g) Formwork support for the post-cast strip: Fix it with through-wall bolts. Step h) Decoration: Use plaster of Paris for decoration, and lay alkali-resistant fiberglass mesh cloth at the joints.

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