Formwork-free mould body of upturning beam of prefabricated bay window

Abstract

The utility model discloses a dismantling-free mould body of an upturning beam of a prefabricated bay window, which comprises a prefabricated part and a dismantling-free mould plate, a reserved hole and a pre-embedded concave nut are arranged in the prefabricated part, the dismantling-free mould plate is arranged on the outer side of a cast-in-place upturning beam in an attached mode, and the prefabricated part, the dismantling-free mould plate and the cast-in-place upturning beam are connected through a full-thread screw. One end of the full-thread screw extends into the prefabricated part and is locked and fixed with the embedded concave nut, the other end of the full-thread screw penetrates through the fastening part in the reserved hole, penetrates through the non-dismantling formwork and the cast-in-place upturning beam and then is connected with the locking nut, and the fastening part is a cross-shaped metal fastening device with threads. According to the die-stripping-free body of the upturning beam of the prefabricated bay window, the difficulty existing in construction of the upturning beam in a narrow space can be solved, the operability is higher, the construction efficiency can be improved, the construction time can be saved, and the construction quality can be guaranteed.

Description

Technical Field

[0001] The utility model relates to a formwork-free body, in particular to a formwork-free body for the upward-turning beam of a precast bay window. Background Technique

[0002] As an important component in prefabricated buildings, precast bay windows are widely used in current prefabricated building residential projects. The pursuit of the exterior facade shape makes the construction of precast bay windows have certain difficulties. Along with the development of ultra-low energy consumption buildings, buildings generally adopt the construction technology of integrating thermal insulation structure, that is, in the construction, the thermal insulation material is integrally cast and connected with the in-situ casting, eliminating the traditional in-situ wooden formwork. However, this has increased the construction difficulty of the structures around the precast bay window to a certain extent.

[0003] Normally, the protruding steel bars of the cantilever slab under the precast bay window will be anchored into the inner in-situ upward-turning beam. When the outer side of the upward-turning beam is formed by a one-time casting using the formwork-free process, due to the narrow outer space and no operating space on the side, traditional wooden squares and steel pipes cannot be used to reinforce the formwork-free insulation board. If not reinforced, a series of construction quality problems such as deviation and bulging of the formwork will occur. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a formwork-free body for the upward-turning beam of a precast bay window, which can not only solve the difficulties existing in the construction of the upward-turning beam in a narrow space, but also has stronger operability, can improve the construction efficiency, save construction time and ensure the construction quality.

[0005] The technical solution adopted by the utility model to solve the above technical problem is to provide a formwork-free body for the upward-turning beam of a precast bay window, including a precast member and a formwork-free template. Reserved holes and embedded concave nuts are arranged in the precast member. The formwork-free template is attached to the outer side of the in-situ upward-turning beam. The precast member, the formwork-free template and the in-situ upward-turning beam are connected by a full-thread screw rod. One end of the full-thread screw rod extends into the precast member and is locked and fixed with the embedded concave nut. The other end of the full-thread screw rod passes through the fastening member in the reserved hole, passes through the formwork-free template and the in-situ upward-turning beam, and is connected with a locking nut. The fastening member is a cross-shaped metal fastening device with threads.

[0006] Further, an in-situ template and a reinforcing wooden square are also attached to the inner side of the in-situ upward-turning beam. The other end of the full-thread screw rod passes through the formwork-free template, the in-situ upward-turning beam, the in-situ template and the reinforcing wooden square; the extended section of the full-thread screw rod is clamped between a pair of parallel steel pipes. One side of the steel pipe is attached to the reinforcing wooden square, and a butterfly buckle is arranged on the other side of the steel pipe. The locking nut is arranged outside the butterfly buckle.

[0007] Further, a plurality of reserved holes are arranged in the precast member at equal intervals. The size of the reserved holes is 200*190 mm, and the center distance between two adjacent reserved holes is 550 mm.

[0008] Further, a reverse thermal insulation layer is provided on the surface of the precast member.

[0009] Further, the thickness of the non-removable formwork is 100 mm.

[0010] The utility model has the following beneficial effects compared with the prior art: The non-removable formwork of the up-turned beam of the precast bay window provided by the utility model can not only solve the difficulties existing in the construction of the up-turned beam in a narrow space, but also has stronger operability, can improve the construction efficiency, save the construction time and ensure the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the non-removable formwork of the up-turned beam of the precast bay window of the utility model;

[0012] Figure 2 is a schematic diagram of the distribution of the reserved holes on the non-removable formwork of the up-turned beam of the precast bay window of the utility model;

[0013] Figure 3 is a schematic front view of the fastening member of the non-removable formwork of the up-turned beam of the precast bay window of the utility model;

[0014] Figure 4 is a schematic longitudinal sectional view of the fastening member of the non-removable formwork of the up-turned beam of the precast bay window of the utility model.

[0015] The labels in the figure are:

[0016] 1, precast member; 2, non-removable formwork; 3, reserved hole; 4, embedded concave nut; 5, fastening member; 6, full-thread screw rod; 7, steel pipe; 8, butterfly buckle; 9, reverse thermal insulation layer; 10, lock nut; 11, cast-in-place up-turned beam; 12, cast-in-place formwork; 13, reinforcing wooden square; 14, hollow internal thread. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further describes the utility model in conjunction with the drawings and embodiments.

[0018] Figure 1 is a schematic structural diagram of the non-removable formwork of the up-turned beam of the precast bay window of the utility model.

[0019] Please refer to Figure 1, the non-removable formwork body of the upper turning beam of the precast bay window provided by the present utility model comprises a precast member 1 and a non-removable formwork 2. A reserved hole 3 and an embedded concave nut 4 are arranged in the precast member 1. The non-removable formwork 2 is attached to the outer side of the cast-in-place upper turning beam 11. The precast member 1, the non-removable formwork 2 and the cast-in-place upper turning beam 11 are connected by a full-thread screw rod 6. One end of the full-thread screw rod 6 extends into the precast member 1 and is locked and fixed with the embedded concave nut 4. The other end of the full-thread screw rod 6 passes through a fastening member 5 in the reserved hole 3, penetrates through the non-removable formwork 2 and the cast-in-place upper turning beam 11 and is connected with a locking nut 10. The fastening member 5 is a cross-shaped threaded fastening device.

[0020] For the non-removable formwork body of the upper turning beam of the precast bay window provided by the present utility model, a plurality of reserved holes 3 are arranged at equal intervals in the precast member 1. The size of the reserved hole 3 is 200*190mm, and the center distance between two adjacent reserved holes 3 is 550mm, as Figure 2 shown.

[0021] For the non-removable formwork body of the upper turning beam of the precast bay window provided by the present utility model, a cast-in-place formwork 12 and a reinforcing wooden square 13 are also attached to the inner side of the cast-in-place upper turning beam 11. The other end of the full-thread screw rod 6 penetrates through the non-removable formwork 2, the cast-in-place upper turning beam 11, the cast-in-place formwork 12 and the reinforcing wooden square 13; the extended section of the full-thread screw rod 6 is clamped between a pair of steel pipes 7 arranged side by side. One side of the steel pipe 7 is attached to the reinforcing wooden square 13, and a butterfly buckle 8 is arranged on the other side of the steel pipe 7. The locking nut 10 is arranged outside the butterfly buckle 8. A reverse thermal insulation layer 9 is arranged on the surface of the precast member 1; the thickness of the non-removable formwork 2 is 100mm. The fastening member 5 is a cross-shaped threaded fastening device and has a hollow internal thread 14, as Figure 3 and Figure 4 shown.

[0022] The non-removable formwork body of the upper turning beam of the precast bay window provided by the present utility model is suitable for non-removable formwork construction on the outer side of the upper turning beam in a narrow space. The specific installation and use are as follows:

[0023] (I) Reserved embedding during component production

[0024] (1) As Figure 2 shown, a hand hole with a size of 200*190mm is reserved on the lower cantilever slab of the precast bay window. The center distance between the hand holes is 550mm, and the slab reinforcement in the hand holes is disconnected and the structural reinforcement is strengthened around.

[0025] (2) Embedded concave nuts 4 are embedded in the lower hanging wall of the outer window. The embedded concave nuts 4 are of M14 model, with a horizontal distance of 550mm, and are used as reinforcement screw rods during the formwork support of the upper turning beam.

[0026] (II) Measuring and setting out

[0027] (1) At the floor slab elevation, respectively release the positioning lines for precast components and the positioning lines for the non-removable formwork of the integrated thermal insulation structure to control the boundary positions of the precast component 1 and the non-removable formwork 2.

[0028] (III) Place the non-removable formwork on the outer side of the up-turned beam

[0029] (1) Before placing the non-removable formwork on the outer side of the up-turned beam, the non-removable formwork 2 should be cut and holes should be left according to the dimensions. The cut thermal insulation board should be able to ensure the installation elevation of the precast component, and the gap left should not be too large to avoid grout leakage. The hole positions on the non-removable formwork 2 should correspond one by one to the positions of the embedded concave nuts 4 in the wall hanging below the exterior window, and the diameter of the reserved hole is 25 mm.

[0030] (2) When placing the non-removable formwork on the outer side of the up-turned beam, in order to ensure that the non-removable formwork on the outer side of the up-turned beam is not displaced, short steel bars can be used to insert one end into the thermal insulation board and temporarily tie the other end to the steel bars of the up-turned beam.

[0031] (IV) Install the precast bay window

[0032] (1) Before installing the precast bay window, ultra-flat pads should be placed at the structural elevation position on the side wall to control the installation elevation.

[0033] (2) The precast bay window should use the inner wall surface of the exterior wall and the axis as the control lines to ensure the accurate installation of the bay window. The control lines should be in no less than one direction.

[0034] (3) When the gap between the lower cantilever slab of the precast bay window and the non-removable formwork on the outer side of the up-turned beam is too large, foamed polyurethane can be used for filling to avoid grout leakage.

[0035] (V) Place the inner wooden formwork and the backing ribs

[0036] (1) The wooden formwork on the inner side of the up-turned beam uses 15-mm plywood. The vertical secondary ribs are selected as the reinforcing wooden squares 13 with a size of 50*80 mm, and the spacing is not greater than 200 mm. The horizontal main ribs outside the wooden squares use two steel pipes 7 with a diameter of 48 mm, one at the top and one at the bottom;

[0037] (2) The wooden formwork should reserve holes with a diameter of 25 mm corresponding to the hole positions on the non-removable formwork and the positions of the embedded concave nuts.

[0038] (VI) Slip on the fastening metal device and pass the screw rod

[0039] (1) After the inner wooden formwork and the backing ribs are placed, first pass the full-thread screw rod 6 of M14 through the up-turned beam from the indoor side. Plastic sleeves should be used within the range of the cast-in-place up-turned beam 11. After passing through the reserved holes of the up-turned beam and the non-removable formwork on the outer side of the up-turned beam, then temporarily slip on the cross-shaped threaded fastening metal device from the reserved hole on the precast cantilever slab onto the M14 full-thread screw rod.

[0040] (2) Align the fully threaded screw 6 with the embedded concave nut 4 and tighten it. If the nut is not aligned with the embedded part, measures should be taken promptly: re-drill holes on the inner formwork and the non-removable formwork.

[0041] (3) After the fully threaded screw 6 is tightened, polyurethane foam should be promptly filled in the gaps around the reserved holes to prevent slurry leakage.

[0042] (VII) Tighten the cruciform fastening metal device

[0043] (1) The worker tightens the cruciform threaded fastening metal device by hand through the reserved hole 3 on the precast cantilever slab and firmly presses it against the non-removable formwork on the outer side of the up-turned beam. The surface of the non-removable formwork after tightening should be flat and vertical, and the side should be flush with the side of the cantilever slab opening.

[0044] (VIII) Pour concrete

[0045] (1) Control the pouring speed of the concrete to reduce the vibration impact on the non-removable formwork on the outer side of the up-turned beam during pouring. The concrete should be poured slowly and in layers.

[0046] (2) When using a vibrating rod for vibration, it should also be avoided that the vibrating rod interferes with the position of the non-removable formwork on the outer side of the up-turned beam. It should be perpendicular to the concrete surface, inserted quickly and pulled out slowly, vibrated evenly and the vibration time should be appropriately extended, without over-vibrating.

[0047] (3) After the concrete strength reaches the design requirements, promptly remove the cruciform threaded fastening metal device and the fully threaded screw 6, and promptly seal the corresponding reserved hole 3.

[0048] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to that defined by the claims.

Claims

1. A non-disassembly mold for the upturned beam of a prefabricated bay window, characterized in that: The invention comprises a prefabricated component (1) and a non-disassembly formwork (2), wherein a reserved hole (3) and a pre-embedded concave nut (4) are arranged in the prefabricated component (1), the non-disassembly formwork (2) is arranged in close contact with the outer side of a cast-in-place upper flip beam (11), the prefabricated component (1), the non-disassembly formwork (2) and the cast-in-place upper flip beam (11) are connected via a full-thread screw (6), one end of the full-thread screw (6) extends into the prefabricated component (1) and is locked and fixed with the pre-embedded concave nut (4), the other end of the full-thread screw (6) passes through a fastening component (5) in the reserved hole (3), passes through the non-disassembly formwork (2) and the cast-in-place upper flip beam (11), and is connected with a locking nut (10), wherein the fastening component (5) is a cross-shaped metal fastening device with threaded teeth.

2. The non-disassembly mold of the upward-turned beam of the prefabricated bay window according to claim 1, characterized in that: The inner side of the cast-in-place upper flip beam (11) is also fitted with a cast-in-place formwork (12) and a reinforcing wood (13); the other end of the full-thread screw (6) passes through the non-disassembly formwork (2), the cast-in-place upper flip beam (11), the cast-in-place formwork (12) and the reinforcing wood (13); the protruding section of the full-thread screw (6) is clamped in a pair of steel pipes (7) arranged side by side, one side of the steel pipe (7) is fitted with the reinforcing wood (13), and the other side of the steel pipe (7) is provided with a butterfly buckle (8), and the locking nut (10) is arranged outside the butterfly buckle (8).

3. The non-disassembly mold of the upward-turned beam of the prefabricated bay window according to claim 1, characterized in that: The prefabricated component (1) is provided with a plurality of equally spaced reserved holes (3), the size of the reserved holes (3) is 200*190 mm, and the center distance between two adjacent reserved holes (3) is 550 mm.

4. The non-disassembly mold of the upward-turned beam of the prefabricated bay window according to claim 1, characterized in that: The surface of the prefabricated component (1) is provided with a reverse-insulation layer (9).

5. The non-disassembly mold for the upward-turned beam of the prefabricated bay window according to claim 1, characterized in that: The thickness of the non-removable template (2) is 100 mm.

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