Prefabricated formwork hollow wall structure

Abstract

The utility model belongs to the technical field of fabricated building engineering, especially relates to a prefabricated formwork hollow wall structure. Including A face formwork, B face form shore, counter pull, steel bar protective layer cushion block, B face formwork bottom lining mould group and reinforcement cage, A face formwork and B face formwork are arranged in parallel in the both sides of reinforcement cage, and the inner side of B face formwork is equipped with B face formwork bottom lining mould group, and A face formwork and B face formwork bottom lining mould group are through steel bar protective layer cushion block and clamp reinforcement cage, A face formwork and B face formwork are equipped with counter pull, and one end of counter pull is poured in A face formwork, and the other end of counter pull is poured in B face formwork after passing through the through -hole on B face formwork bottom lining mould group, and the wall cavity is formed between A face formwork and B face formwork. The utility model solves the problem of the prior art, such as difficult alignment, poor precision, damage to steel bar of counter pull, has the advantages of simple process, low cost, good forming quality, and is suitable for prefabricated building wall.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building engineering technology, and specifically relates to a prefabricated hollow wall structure. Background Technology

[0002] In the field of prefabricated buildings, hollow walls are widely used due to their advantages such as light weight, convenient on-site reinforcement connection, and good waterproofing. Among them, the formwork hollow wall is formed by clamping a steel mesh between two non-removable formwork panels. Ties are used to connect the two formwork panels to prevent bulging during concrete pouring. The two formwork panels only serve as non-removable formwork and do not participate in structural stress. Its lighter weight and easier transportation and hoisting have led to its increasing market acceptance.

[0003] The existing structural forms and molding processes of hollow molded walls mainly include the following three categories, but all of them have obvious technical defects:

[0004] 1. Assemble and form hollow wall of mold shell:

[0005] The process steps are as follows: a) The wall reinforcement system is formed independently, that is, the wall reinforcement cage is prepared first; b) Two wall mold shells are prepared and formed separately, with pre-reserved alignment holes; c) The two mold shells are clamped together with the wall reinforcement cage, and then the corresponding mold shell holes are pulled together with tie rods; d) The overall forming is completed.

[0006] Defects: The alignment of the two mold shells is extremely difficult, the forming accuracy is poor, the overall rigidity is poor and it is easy to deform, it is difficult to embed conduits / boxes, and the tie points are exposed, requiring secondary processing, which is time-consuming and labor-intensive.

[0007] 2. Inverted and flipped molding process for hollow wall structure:

[0008] The process steps are as follows: a) Prepare the wall reinforcement cage; b) Tie (weld) the mold shell tie members to the corresponding positions of the wall reinforcement cage; c) Place the whole in the side mold of the single-sided mold shell, pour the mold shell material, and cure it; d) After the single-sided mold shell is formed, together with the reinforcement cage, it is rotated 180 degrees and inserted into the prepared liquid material of the other side mold shell, and cured together to form a hollow mold shell wall.

[0009] Defects: Welding the tie rod to the wall reinforcement cage can damage the wall's reinforcing steel, seriously threatening structural safety; the insertion depth of the tie rod is difficult to control (too deep will cause the end to be exposed and rusted, too shallow will easily cause mold expansion); poor forming accuracy; the steel fibers in the mold shell material are pressed down by the tie rod, reducing the pull-out resistance; large-scale turning equipment is required, which is difficult to operate and costly; secondary curing consumes a lot of energy and is expensive.

[0010] 3. Hollow wall formed by integral insertion of the mold:

[0011] The process steps are as follows: a) The wall reinforcement cage and the formwork tie rods are fixed in a large custom mold; b) The whole structure is inserted into the prepared formwork liquid to complete the preparation of one formwork wall panel; c) The other side of the formwork needs to be supported by a complex detachable mold, and the formwork liquid is poured; d) The whole structure is cured and formed; e) The top formwork forming mold is removed; f) The large mold fixing the reinforcement system is removed; g) The hollow formwork wall is completed.

[0012] Disadvantages: High equipment investment; complex and inefficient assembly process for reinforcing bars and tie rods; no reinforcing bars can be exposed on the side of the wall, resulting in low utilization efficiency; difficult to control the insertion accuracy of tie rods; difficult to embed conduits / boxes; time-consuming and inefficient mold assembly and demolding; unable to produce large walls due to limitations of the forming mold. Utility Model Content

[0013] To address the aforementioned problems, the purpose of this utility model is to provide a prefabricated hollow wall structure that is simple to manufacture, accurately aligned, and inexpensive, thereby solving the problems of difficult alignment, poor accuracy, impact of tie rods on structural safety, and high cost in the existing technology, and promoting the development of prefabricated buildings.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] This utility model provides a prefabricated hollow wall structure, including an A-side mold shell, a B-side mold shell, tie rods, a steel reinforcement protective layer pad, a B-side mold shell bottom liner assembly, and a steel reinforcement cage. The A-side mold shell and the B-side mold shell are arranged parallel to each other on both sides of the steel reinforcement cage. The B-side mold shell bottom liner assembly is provided on the inner side of the B-side mold shell. The A-side mold shell and the B-side mold shell bottom liner assembly clamp the steel reinforcement cage together with the steel reinforcement protective layer pad. Multiple tie rods for tie rods are arranged between the A-side mold shell and the B-side mold shell. One end of the tie rod is cast into the A-side mold shell, and the other end of the tie rod passes through a through hole on the B-side mold shell bottom liner assembly and is then cast into the B-side mold shell. A wall cavity is formed between the A-side mold shell and the B-side mold shell.

[0016] The tie rod includes a tie rod and an upper anchoring end and a lower anchoring end respectively disposed at both ends of the tie rod, wherein the upper anchoring end and the lower anchoring end are respectively cast into the B-side mold shell and the A-side mold shell.

[0017] Both the upper anchoring end and the lower anchoring end are vertically connected to the tie rod, forming an I-shaped structure.

[0018] The tie rod is made of steel reinforcement.

[0019] The steel cage includes parallel steel mesh on wall A and steel mesh on wall B, and multiple steel mesh tie bars connecting the steel mesh on wall A and steel mesh on wall B. The steel protective layer pads are evenly distributed between the steel mesh on wall A and the A-side formwork, and between the steel mesh on wall B and the bottom lining module of the B-side formwork.

[0020] Both the A-side mold shell and the B-side mold shell are made of high-strength concrete; the sum of the thicknesses of the B-side mold shell and the B-side mold shell base module is equal to the thickness of the A-side mold shell.

[0021] The B-side mold shell bottom liner assembly includes multiple central B-side mold shell bottom liners laid out in sequence and two side B-side mold shell bottom liners respectively disposed on both sides of the multiple central B-side mold shell bottom liners. Multiple through holes for the tie rod to pass through are provided between two adjacent central B-side mold shell bottom liners and between the central B-side mold shell bottom liners and the side B-side mold shell bottom liners.

[0022] The central B-side mold shell bottom liner includes a central liner body, and multiple sets of semi-circular symmetrical liner openings are symmetrically provided on both sides of the central liner body.

[0023] The side B-side mold shell bottom liner includes a side liner body. The inner edge of the side liner body is provided with multiple semi-circular slots. The multiple semi-circular slots correspond one-to-one with the symmetrical openings of the liner on the edge of the middle liner body. The tie rod is housed in the symmetrical openings of the liner in the middle liner body and is secured by the semi-circular slots on the side liner body.

[0024] The advantages and beneficial effects of this utility model are as follows: The precast hollow wall structure provided by this utility model eliminates the need for welding or binding between the tie members and the wall's reinforcing cage, meaning the tie bars do not affect the wall's load-bearing reinforcement. The ends of the tie members are individually cast into the mold shell liquid, resulting in stronger anchoring force. The process is simple, requiring no complex equipment, and is easy to implement with precise alignment. In-situ casting eliminates the need for flipping or secondary relocation. The in-situ layered molding process simplifies the handling of pre-embedded junction boxes and conduits. It has low requirements for mold shell materials, significantly reducing costs. Reinforcing bars can be arbitrarily extended from the sides of the hollow wall, facilitating on-site installation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the prefabricated hollow wall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the tie rod in this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the bottom liner of the B-side mold shell in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the bottom liner of the B-side mold shell in the middle of this utility model;

[0029] Figure 5 This is a schematic diagram of the process flow for the prefabricated hollow wall structure of this utility model.

[0030] In the diagram: 1. A-side mold shell; 2. B-side mold shell; 3. Tie rod; 301. Upper anchoring end; 302. Tie rod; 303. Lower anchoring end; 4. Side B-side mold shell bottom liner; 401. Side liner body; 402. Semi-circular locking hole; 5. Middle B-side mold shell bottom liner; 501. Middle liner body; 502. Symmetrical openings in the liner; 6. Reinforcing steel protective layer pad; 7. Wall reinforcement mesh tie bar; 8. A-side mold shell side mold; 9. B-side mold shell side mold; 10. B-side mold shell side mold support frame; 11. Wall A-side reinforcement mesh; 12. Wall B-side reinforcement mesh; 13. Wall cavity; 18. Tie rod limiting clamp; B4. Design width of side liner; B5. Design width of middle liner; D1. Design thickness of A-side mold shell; D2. Design thickness of wall reinforcement protective layer;

[0031] D3, Design thickness of the bottom liner of the B-side mold shell; D4, Design thickness of the B-side mold shell; H, Design thickness of the wall cavity. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] See Figure 1 As shown, this utility model embodiment provides a prefabricated hollow wall structure, including an A-side mold shell 1, a B-side mold shell 2, tie rods 3, a reinforcing bar protective layer pad 6, a B-side mold shell bottom liner assembly, and a reinforcing cage. The A-side mold shell 1 and the B-side mold shell 2 are arranged parallel to each other on both sides of the reinforcing cage. The B-side mold shell 2 has a B-side mold shell bottom liner assembly on its inner side. The A-side mold shell 1 and the B-side mold shell bottom liner assembly clamp the reinforcing cage through the reinforcing bar protective layer pad 6. Multiple tie rods 3 for tie rods are arranged between the A-side mold shell 1 and the B-side mold shell 2. One end of the tie rod 3 is cast into the A-side mold shell 1, and the other end of the tie rod 3 passes through a through hole on the B-side mold shell bottom liner assembly and is cast into the B-side mold shell 2. A wall cavity 13 is formed between the A-side mold shell 1 and the B-side mold shell 2.

[0034] See Figure 1 As shown in the embodiment of this utility model, the reinforcing cage includes parallel wall A-side reinforcing mesh 11 and wall B-side reinforcing mesh 12, and multiple wall reinforcing mesh tie bars 7 connected between the wall A-side reinforcing mesh 11 and wall B-side reinforcing mesh 12. Both ends of the wall reinforcing mesh tie bars 7 are hook-shaped structures, which hook onto the horizontal bars of the wall A-side reinforcing mesh 11 and wall B-side reinforcing mesh 12 respectively, playing a tying role and ensuring that the relative positions of the wall A-side reinforcing mesh 11 and wall B-side reinforcing mesh 12 are accurate and stable. Reinforcing bar protective layer spacers 6 are arranged between the wall A-side reinforcing mesh 11 and the A-side formwork 1, and between the wall B-side reinforcing mesh 12 and the B-side formwork bottom lining module.

[0035] See Figure 2As shown in the embodiment of this utility model, the tie member 3 includes a tie rod 302 and an upper anchoring end 301 and a lower anchoring end 303 respectively disposed at both ends of the tie rod 302, wherein the upper anchoring end 301 and the lower anchoring end 303 are respectively cast into the B-side mold shell 2 and the A-side mold shell 1.

[0036] Preferably, both the upper anchoring end 301 and the lower anchoring end 303 are vertically connected to the tie rod 302, forming an I-shaped structure. The upper anchoring end 301 and the lower anchoring end 303 are integrated with the tie rod 302 using an upsetting process, or they can be formed by secondary welding.

[0037] Specifically, the tie member 3 is made of steel bars or other high-strength materials. The two ends of the tie member 3 are respectively cast into the A-side mold shell 1 and the B-side mold shell 2 to form a tie, which prevents the mold from expanding when pouring concrete later. The specifications and number of tie members 3 are determined by the design.

[0038] See Figure 1 As shown in the embodiment of this utility model, the B-side mold shell bottom liner assembly includes a plurality of central B-side mold shell bottom liner 5 laid flat in sequence and two side B-side mold shell bottom liner 4 respectively disposed on both sides of the plurality of central B-side mold shell bottom liner 5. A plurality of through holes for the pull member 3 to pass through are provided between two adjacent central B-side mold shell bottom liner 5 and between the central B-side mold shell bottom liner 5 and the side B-side mold shell bottom liner 4.

[0039] See Figure 4 As shown in the embodiment of this utility model, the central B-side mold shell bottom liner 5 includes a central liner body 501, and multiple sets of semi-circular symmetrical liner openings 502 are symmetrically provided on both sides of the central liner body 501. See also Figure 3 As shown, the side B-side mold shell bottom liner 4 includes a side liner body 401. The inner edge of the side liner body 401 is provided with a plurality of semi-circular slots 402, the size and spacing of which correspond to the specifications and arrangement of the tie members 3. The plurality of semi-circular slots 402 correspond one-to-one with the symmetrical openings 502 of the liner on the edge of the middle liner body 501. The tie members 3 are housed in the symmetrical openings 502 of the liner in the middle liner body 501 and are secured by the semi-circular slots 402 on the side liner body 401.

[0040] Specifically, both the central B-side mold base liner 5 and the edge B-side mold base liner 4 are made of steel plates, with their bottom surfaces supported by steel reinforcement protective layer pads 6. One side of the edge B-side mold base liner 4 is tightly attached to the B-side mold side liner 9, and the other side is secured to the tie rod 3 via a semi-circular snap-fit ​​402. The central B-side mold base liner 5 and the edge B-side mold base liner 4 serve as the casting bottom molds for the B-side mold 2 and are cast together with the B-side mold 2. The design widths B4 and B5 of the edge liner liner are determined based on actual working conditions.

[0041] In the embodiments of this utility model, both the A-side mold shell 1 and the B-side mold shell 2 are cast from high-strength concrete and reinforced with steel mesh or high-strength fiber inside. They are formwork that does not need to be removed, and their thickness is determined by the design. During factory molding, the A-side mold shell 1 is tightly attached to the mold table surface on its bottom surface. The A-side mold shell 1 and the B-side mold shell 2 are generally symmetrically arranged, and the wall's reinforcing steel cage is clamped by the steel reinforcement protective layer spacers 6 on both sides to form a precast hollow wall.

[0042] Furthermore, the sum of the thicknesses of B-side mold shell 2 and the B-side mold shell bottom liner module is equal to the thickness of A-side mold shell 1. See details... Figure 1 As shown, the design thickness of the A-side formwork shell, D1, is equal to the design thickness of the bottom lining of the B-side formwork shell, D3, plus the design thickness of the B-side formwork shell, D4. The design thickness of the concrete cover for the wall reinforcement in the top and bottom layers is D2, and the design thickness of the wall cavity, H, is equal to the design thickness of the concrete cover for the wall reinforcement, D2 x 2, plus the thickness of the reinforcement cage.

[0043] Furthermore, the bottom of the central B-side mold shell bottom liner 5 and the side B-side mold shell bottom liner 4 are integrated with the steel reinforcement protective layer pad 6 to facilitate installation and improve work efficiency.

[0044] The present invention provides a prefabricated hollow wall structure in which the tie rod 3 does not need to be welded or tied to the wall reinforcement cage, that is, the tie rod does not affect the wall's load-bearing reinforcement; the ends of the tie rod 3 are respectively cast into the mold liquid, resulting in stronger anchoring force; the plane position and the depth of the tie rod 3 into the mold are precisely controlled by the clamp, avoiding various problems caused by the inverted molding process such as rust spots.

[0045] The prefabricated hollow wall structure provided by this utility model includes the following steps in its molding process:

[0046] Step S1: Design and determine the wall parameters and the arrangement of tie rods 3;

[0047] Specifically, this includes determining the thickness of the hollow wall, the reinforcement of the wall, the thickness of the formwork, the specifications and arrangement of embedded parts and tie parts, etc.

[0048] Step S2: Prepare tie rod 3 and reinforcing cage; tie rod 3 can be cut to size according to design specifications, and can be formed by upsetting or welding;

[0049] Step S3: Prepare surface A mold shell 1, and pour the lower end of the tie rod 3 into surface A mold shell 1;

[0050] Step S4: Place the bottom layer steel reinforcement protective layer pad 6 and steel reinforcement cage on the A-side formwork 1, and install the pre-embedded conduit.

[0051] Step S5: Erect the B-side mold shell side mold 9 and the B-side mold shell side mold support frame 10;

[0052] The B-side formwork 9 is set on all four sides to determine the planar dimensions of the hollow wall of the formwork, and its height can limit the design thickness of the B-side formwork 2; the B-side formwork support frame 10 is supported between the A-side formwork 8 and the B-side formwork 9 to support the B-side formwork 9; the top layer of steel reinforcement protective layer pad 6 and the B-side formwork bottom lining module are installed above the steel cage; the arrangement of the top layer of steel reinforcement protective layer pad 6 must ensure stable support of the B-side formwork bottom lining module and the pouring load;

[0053] Step S6: Seal the leakage points of the B-side mold shell bottom lining module, and paste and seal the positions that are prone to leakage during pouring; install the embedded junction box of the B-side mold shell, and pour the B-side mold shell material above the B-side mold shell bottom lining module to complete the B-side mold shell 2 forming.

[0054] Step S7: After overall curing and molding, remove the side mold 8 of side A, the side mold 9 of side B, and the support frame 10 of side B to obtain a precast hollow wall with a wall cavity 13.

[0055] The purpose of the wall cavity 13 is to form a precast hollow wall, that is, to pour concrete into the wall cavity 13 later to form the load-bearing wall of the building structure.

[0056] Furthermore, in step S3, the preparation of surface A mold shell 1 includes the following steps:

[0057] Erect A-side mold 8: A-side mold 8 is set on four sides to determine the planar dimensions of the hollow wall of the mold shell. Its height can limit the design thickness of A-side mold 1.

[0058] The tie member 3 is fixed by the tie member limiting clamp 18. The planar position and vertical depth of the tie member 3 are controlled by the tie member limiting clamp 18. The planar position of the tie member 3 corresponds to the through hole on the bottom liner module of the B-side mold shell. See [reference needed]. Figure 5 As shown;

[0059] After pouring the A-side mold shell material and curing it until initial setting, remove the tie rod limit clamp 18.

[0060] The prefabricated hollow wall structure provided by this utility model has the following main advantages:

[0061] The process is simple and easy to implement: no complex process equipment is required, which reduces equipment investment and operational difficulty, and simplifies the production process.

[0062] In-situ casting, no additional operations required: The in-situ layered molding process eliminates the need for flipping, secondary relocation, and other steps, reducing operational complexity and costs, while also minimizing structural damage that may result from flipping or other operations.

[0063] It does not affect the wall's reinforcing steel: the tie members do not need to be welded or tied to the wall's reinforcing steel cage, avoiding damage to the wall's reinforcing steel caused by welding and other operations, and ensuring structural safety.

[0064] The tie members have strong anchoring force: the ends of the tie members are all cast separately into the molten material of the mold shell. Compared with the insert-type tie members in the traditional process, the anchoring is more secure and can more effectively prevent the mold from bulging during concrete pouring.

[0065] Controllable precision reduces quality issues: The plane position and depth of the tie-in component are precisely controlled by the clamps, which prevents various problems caused by the inverted molding process, such as rust spots, thus improving the molding precision of the hollow wall.

[0066] Simple pretreatment: The in-situ layered molding process makes the treatment of embedded junction boxes and conduits simpler and more convenient, improving construction efficiency.

[0067] Flexible and convenient to use: The hollow wall can have ribs protruding from its sides, which facilitates on-site installation and improves the efficiency of the wall in practical applications.

[0068] The above description is merely an embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, extensions, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A prefabricated hollow wall structure, characterized in that, The structure includes an A-side formwork (1), a B-side formwork (2), tie rods (3), a steel reinforcement protective layer pad (6), a B-side formwork bottom lining module, and a steel reinforcement cage. The A-side formwork (1) and the B-side formwork (2) are arranged parallel to each other on both sides of the steel reinforcement cage. The B-side formwork bottom lining module is provided on the inner side of the B-side formwork (2). The A-side formwork (1) and the B-side formwork bottom lining module clamp the steel reinforcement cage through the steel reinforcement protective layer pad (6). Multiple tie rods (3) for tie rods are arranged between the A-side formwork (1) and the B-side formwork (2). One end of the tie rod (3) is poured into the A-side formwork (1), and the other end of the tie rod (3) passes through the through hole on the B-side formwork bottom lining module and is poured into the B-side formwork (2). A wall cavity (13) is formed between the A-side formwork (1) and the B-side formwork (2).

2. The prefabricated hollow wall structure according to claim 1, characterized in that, The tie member (3) includes a tie rod (302) and an upper anchoring end (301) and a lower anchoring end (303) respectively disposed at both ends of the tie rod (302), wherein the upper anchoring end (301) and the lower anchoring end (303) are respectively cast into the B-side mold shell (2) and the A-side mold shell (1).

3. The prefabricated hollow wall structure according to claim 2, characterized in that, Both the upper anchoring end (301) and the lower anchoring end (303) are vertically connected to the tie rod (302) to form an I-shaped structure.

4. The prefabricated hollow wall structure according to claim 2, characterized in that, The tie rod (3) is made of steel bars.

5. The prefabricated hollow wall structure according to claim 1, characterized in that, The steel cage includes parallel wall A-side steel mesh (11) and wall B-side steel mesh (12) and multiple wall steel mesh tie bars (7) connecting the wall A-side steel mesh (11) and wall B-side steel mesh (12). The steel reinforcement protective layer pads (6) are evenly distributed between the wall A-side steel mesh (11) and the A-side formwork (1) and between the wall B-side steel mesh (12) and the B-side formwork bottom lining module.

6. The prefabricated hollow wall structure according to claim 1, characterized in that, Both the A-side mold shell (1) and the B-side mold shell (2) are made of high-strength concrete; the sum of the thicknesses of the B-side mold shell (2) and the B-side mold shell bottom lining module is equal to the thickness of the A-side mold shell (1).

7. The prefabricated hollow wall structure according to claim 1, characterized in that, The B-side mold shell bottom liner assembly includes a plurality of central B-side mold shell bottom liners (5) laid out in sequence and two side B-side mold shell bottom liners (4) respectively disposed on both sides of the plurality of central B-side mold shell bottom liners (5). A plurality of through holes for the tie rod (3) to pass through are provided between two adjacent central B-side mold shell bottom liners (5) and between the central B-side mold shell bottom liners (5) and the side B-side mold shell bottom liners (4).

8. The prefabricated hollow wall structure according to claim 7, characterized in that, The central B-side mold shell bottom liner (5) includes a central liner body (501), and the two sides of the central liner body (501) are symmetrically provided with multiple sets of semi-circular liner symmetrical openings (502).

9. The prefabricated hollow wall structure according to claim 8, characterized in that, The side B-side mold shell bottom liner (4) includes a side liner body (401). The inner edge of the side liner body (401) is provided with a plurality of semi-circular slots (402). The plurality of semi-circular slots (402) correspond one-to-one with the symmetrical openings (502) on the edge of the middle liner body (501). The tie rod (3) is housed in the symmetrical openings (502) of the middle liner body (501) and is secured by the semi-circular slots (402) on the side liner body (401).

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