A steel support formwork for cast-in-place floor slab

Abstract

The utility model discloses a steel support non-disassembly formwork for cast-in-place floor slabs, which is assembled and used between two beams, and includes a rigid support frame for supporting the two beams, and the rigid support frame is provided with end support bolts respectively used for supporting the two beams; a bottom formwork resting between the two beams is suspended on the rigid support frame, and a hanging connector is provided on the upper surface of the bottom formwork, and a connecting fastener is provided between the hanging connector and the bottom formwork, and a hanging connector nut is fixed on the hanging connector, and hanging bolts respectively threadedly connected with each hanging connector nut are installed on the rigid support frame. The utility model achieves the purposes of simplifying the on-site construction process, reducing the on-site labor, reducing on-site construction garbage and environmental pollution, and the hanging connector used is simple to process and manufacture, and has low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of building assembly construction, in particular to a steel bracket non-disassembly template for a cast-in-place floor slab. Background Art

[0002] The cast-in-place formwork under existing construction conditions is supported on the bottom and side of the beam. Fig.12 As shown, supports are set at the bottom of the cast-in-place floor slab, and templates, such as steel templates, wooden templates, etc., are set on the supports. Rebars are tied to the templates of the floor slab, and cast-in-place concrete is poured. After the cast-in-place concrete of the floor slab reaches the strength, the supports and bottom templates are removed. This construction scheme requires a large number of temporary supports, scaffolding, and a large number of templates to be set up on site. The construction is cumbersome, the on-site labor workload is large, and the on-site construction garbage and environmental pollution are aggravated. The inventor is committed to the research and improvement of the template-free disassembly process, in order to achieve the purposes of simplifying the on-site construction process, reducing the on-site labor workload, reducing garbage and environmental pollution, etc. On this basis, the inventor further optimizes the structural process in combination with the construction conditions to further reduce costs and simplify the manufacturing process, and the invention is created from this. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a steel bracket non-disassembly formwork for cast-in-place floor slabs which can simplify on-site construction procedures, reduce on-site labor, reduce garbage and environmental pollution, and has low cost and simple processing and manufacturing.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a steel support non-disassembly formwork for cast-in-place floor slabs, assembled and used between two beams, including a rigid support frame for supporting the two beams, the rigid support frame is equipped with end support bolts respectively used to support the two beams; a bottom formwork resting between the two beams is suspended on the rigid support frame, a hanging connector is provided on the upper surface of the bottom formwork, a connecting fastener is provided between the hanging connector and the bottom formwork, a hanging connector nut is fixedly provided on the hanging connector, and hanging bolts threadedly connected to each of the hanging connector nuts are installed on the rigid support frame.

[0005] As a preferred technical solution, the connecting fasteners include countersunk self-tapping screws that penetrate the bottom mold and the hanging connector in sequence upward.

[0006] As a preferred technical solution, a mesh cloth is bonded to the bottom surface of the bottom mold.

[0007] As a preferred technical solution, the bottom mold includes a wooden board layer and an inorganic board layer arranged in sequence from top to bottom.

[0008] As a preferred technical solution, the rigid support frame is provided with hanging mounting holes corresponding to each of the hanging bolts, and hanging clamping nuts are fixed at the lower edges of the hanging mounting holes. The hanging bolts pass downward through the hanging mounting holes and are threadedly connected with the hanging clamping nuts.

[0009] As a preferred technical solution, the rigid support frame is provided with support mounting holes corresponding to each of the end support bolts, and support clamping nuts are fixed at the lower edges of the support mounting holes. The end support bolts pass downward through the support mounting holes and are threadedly connected to the support clamping nuts.

[0010] As a preferred technical solution, the end support bolt outer sleeve is provided with a concrete isolation sleeve.

[0011] As a preferred technical solution, the hanging connector is made of flat steel.

[0012] As a preferred technical solution, the outer sleeve of the hanging bolt is provided with a concrete isolation sleeve.

[0013] As a preferred technical solution, the cross-section of the hanging connector is arranged in a "X" shape, the connecting fasteners are respectively provided between the two bottom edges of the hanging connector and the bottom mold, and the hanging connecting nut is fixed at the top of the hanging connector.

[0014] Due to the adoption of the above technical solution, the utility model uses the connecting fastener to fix the bottom formwork at the bottom of the hanging connector, and uses the hanging bolt to be threadedly connected with the hanging connection nut on the hanging connector, and pre-assembles the bottom formwork and the rigid support frame into a disassembly-free formwork system, which is transported and hoisted in place together, and the two ends of the rigid support frame are supported on the two beams respectively. After the steel bars are tied on the bottom formwork, the cast-in-place slab concrete is poured. After the floor concrete reaches the design strength, the connection between the hanging bolt and the hanging connection nut is released, and the rigid support frame is transported back to the processing plant together with the hanging bolt and the end support bolt for reuse. The bottom formwork exists in the floor slab as a part, and the connecting fastener and the hanging connector are retained between the cast-in-place floor concrete and the bottom formwork to play a connecting and fastening role. As a result, the utility model achieves the purposes of simplifying the on-site construction process, reducing the on-site labor, reducing on-site construction garbage and environmental pollution. The use of the hanging connector as the intermediate connector can be easily realized by using flat steel, bent plate, etc., and has simple processing and manufacturing and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0016] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at point A;

[0018] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at B;

[0019] Figure 4 yes Figure 1 A magnified schematic diagram of the CC structure;

[0020] Figure 5 yes Figure 4 A schematic diagram of the structure at D of FIG.

[0021] Figure 6 yes Figure 1 A schematic diagram of a top view structure;

[0022] Figure 7 This is a schematic diagram of the structure of a countersunk self-tapping screw added to the bottom mold of the first embodiment of the utility model;

[0023] Figure 8 This is a schematic structural diagram of a bottom mold in a first embodiment of the utility model;

[0024] Fig. 9 This is a state diagram of the first embodiment of the utility model when the concrete slab is cast in place;

[0025] Fig.10 yes Fig. 9 State diagram after disassembling the rigid support frame;

[0026] Fig.11 This is a structural schematic diagram of the hanging connection member of the second embodiment of the utility model;

[0027] Fig.12 It is a schematic diagram of the construction principle of the prior art using temporary supports and formwork.

[0028] In the figure: 1-rigid support frame; 11-main steel beam; 12-connecting auxiliary beam; 2-end support bolt; 21-support mounting hole; 22-support clamping nut; 3-bottom formwork; 31-wooden board layer; 32-inorganic board layer; 33-mesh cloth; 4-hanging connector; 41-flat steel; 5-connecting fastener; 51-countersunk self-tapping screw; 6-hanging connecting nut; 7-hanging bolt; 71-hanging mounting hole; 72-hanging clamping nut; 8-concrete casing; 91-beam; 92-rebar; 93-floor concrete; 94-temporary support; 95-formwork. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, exemplary embodiments of the present invention are described only by way of illustration. It is undoubted that one of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0030] Embodiment 1: Figure 1 and Fig. 9 As shown, a steel support formwork for cast-in-place floor slabs is assembled and used between two beams 91. The beams 91 can be steel beams or concrete beams, which are not limited here. This embodiment includes a rigid support frame 1 for supporting the two beams 91, and the rigid support frame 1 is equipped with end support bolts 2 for supporting the two beams 91 respectively. The rigid support frame 1 relies on the support of the end support bolts 2 on the beams 91 and its own sufficient rigidity to form a rigid structure for hanging the bottom formwork 3.

[0031] like Figure 3 As shown, the rigid support frame 1 of this embodiment is provided with support mounting holes 21 that penetrate up and down corresponding to each of the end support bolts 2, and support clamping nuts 22 are fixed at the lower edges of the support mounting holes 21. The end support bolts 2 pass through the support mounting holes 21 downward and are threadedly connected with the support clamping nuts 22. The end support bolts 2 are fastened to the rigid support frame 1 by being threadedly connected with the support clamping nuts 22 and having their heads screwed to the upper edges of the support mounting holes 21. This fastening method is simple and easy to operate, and is conducive to simplifying the on-site construction process. Among them, the support clamping nuts 22 can be fixed to the lower edges of the support mounting holes 21 by welding or other methods.

[0032] like Figure 4 and Figure 6As shown, the rigid support frame 1 described in this embodiment includes at least two main steel beams 11 arranged across the two beams 91, and a number of connecting auxiliary beams 12 are fixedly arranged between the two adjacent main steel beams 11, and a frame structure with high rigidity is formed by fixing the main and auxiliary beams to each other. Among them, the fixed connection between the connecting auxiliary beams 12 and the main steel beams 11 can be bolted or directly welded, and this embodiment is illustrated by bolting. The main steel beam 11 can be made of steel materials such as channel steel, I-beam, square rectangular tube or C-shaped steel. Of course, it can also be realized by self-welded steel beams with higher strength. There is no limitation here. This embodiment is only illustrated by channel steel. As for the setting method of the end support bolts 2 described in this embodiment, the support mounting hole 21 is set through the lower flange of the channel steel, and the support clamping nut 22 is welded to the bottom surface of the lower flange.

[0033] like Figure 1 and Fig. 9 As shown, the rigid support frame 1 is hung with a bottom mold 3 resting between the two beams 91. The bottom mold 3 can be directly made of small mud fiberboard, calcium silicate board or other inorganic board, or a composite board. Figure 8 As shown, the bottom mold 3 of this embodiment includes a wood board layer 31 and an inorganic board layer 32 arranged in sequence from top to bottom. In this composite formwork, the upper wood board layer 31 can increase the strength and toughness of the non-removal formwork, and the lower inorganic board layer 32 can improve the fire resistance and facilitate surface decoration. Among them, the wood board layer 31 can be made of commonly used solid wood boards or plywood, etc., and its thickness is preferably 5mm to 9mm. The inorganic board layer 32 can be made of cement pressure board, calcium silicate board, gypsum board, etc., and its thickness is preferably 5mm to 8mm.

[0034] Preferably, if Figures 2 to 5 As shown, a mesh cloth 33 is bonded to the bottom surface of the bottom mold 3, and the mesh cloth 33 can increase the strength and integrity of the non-removal formwork, which is beneficial to reduce the deformation of the formwork during on-site construction and simplify operations such as flatness adjustment.

[0035] like Figure 2 , Figure 4 and Figure 5 As shown, a hanging connector 4 is provided on the upper surface of the bottom mold 3, and a connecting fastener 5 is provided between the hanging connector 4 and the bottom mold 3, and the bottom mold 3 is fixed to the bottom of the hanging connector 4 by the connecting fastener 5. A hanging connection nut 6 is fixedly provided on the hanging connector 4, and hanging bolts 7 threadedly connected to each of the hanging connection nuts 6 are installed on the rigid support frame 1, and the hanging bolts 7 are connected to the hanging connection nuts 6 to form a hanging assembly for the bottom mold 3.

[0036] Among them, the rigid support frame 1 is provided with a hanging installation hole 71 which is arranged vertically and horizontally corresponding to each hanging bolt 7, and a hanging clamping nut 72 is fixedly arranged at the lower edge of the hanging installation hole 71, and the hanging bolt 7 passes downward through the hanging installation hole 71 and is threadedly connected with the hanging clamping nut 72. The structural principle and effect of the hanging bolt 7 arranged on the rigid support frame 1 are the same as those of the end support bolt 2, and will not be repeated here.

[0037] The connecting fastener 5 includes a countersunk self-tapping screw 51 that passes through the bottom form 3 and the hanging connector 4 in sequence. The self-tapping connection is directly made by the self-tapping screw, which can simplify the connection operation and improve the connection efficiency while ensuring the connection between the bottom form 3 and the hanging connector 4. Preferably, the upper end of the countersunk self-tapping screw 51 extends out of the hanging connector 4. On the one hand, this can further ensure the connection between the bottom form 3 and the hanging connector 4, and on the other hand, it can facilitate the strengthening of the pulling effect between the bottom form 3 and the floor concrete 93 after the slab concrete is cast in place. Preferably, as Figure 7 As shown, the bottom form 3 is provided with a plurality of countersunk self-tapping screws 51 which pass through the bottom form 3 upwards, so as to further enhance the tie effect between the bottom form 3 and the floor concrete 93 after pouring.

[0038] The hanging connector 4 of this embodiment is made of flat steel 41, which is a common profile. Using flat steel 41 can simplify the processing and manufacturing of components and reduce costs. The flat steel 41 can be a small section corresponding to each of the hanging bolts 7 and the hanging connector 4, such as Figure 2 and Figure 5 As shown, it can also be a long strip common to the hanging bolts 7 and the hanging connectors 4 arranged in a row, such as Figure 7 As shown, or the above two methods can be used in combination. When the hanging bolts 7 and the hanging connectors 4 arranged in a row are in a long strip shape, countersunk self-tapping screws 51 should be added between adjacent hanging bolts 7 to enhance the fastening connection between the long strip flat steel 41 and the bottom form 3. It is also preferred that the countersunk self-tapping screws 51 also extend upward from the hanging connector 4 to further enhance the pulling effect between the bottom form 3 and the floor concrete 93 after pouring.

[0039] In this embodiment, the hanging connection nut 6 is welded together with the hanging connector 4 in advance to form a separate part. The bottom mold 3 is fixed to the bottom of the hanging connector 4 by the connecting fastener 5. After fastening, the mesh cloth 33 is pasted on the bottom surface of the bottom mold 3 using cement mortar to increase the strength and integrity of the non-disassembly formwork. The hanging bolts 7 are then threadedly connected to the hanging connection nuts 6 on the hanging connector 4, and the bottom mold 3 and the rigid support frame 1 are preassembled into a non-disassembly formwork system. The system is transported and hoisted into place together. After being in place, the two ends of the rigid support frame 1 are directly supported on the two beams 91 by the end support bolts 2. After tying the steel bars 92 on the bottom mold 3, as shown Fig. 9 As shown, pour the cast-in-place concrete slab.

[0040] After the floor concrete 93 reaches the designed strength, the connection between the hanging bolt 7 and the hanging connection nut 6 is released. Figure 3 As shown, the end support bolt 2 is provided with a concrete isolation sleeve 8 to isolate the end support bolt 2 from the concrete slurry when the slab concrete is cast in place, so as to facilitate the withdrawal of the end support bolt 2 after the floor concrete 93 is formed. Figure 2 and Figure 5 As shown, the outer sleeve of the hanging bolt 7 is provided with a concrete isolation sleeve 8. After the end support bolt 2 and the hanging bolt 7 are withdrawn from the concrete isolation sleeve 8, they are separated from the floor concrete 93. Fig.10 As shown, the disassembly of the rigid support frame 1 and the bottom form 3 is completed; wherein, the use of the concrete isolation sleeve 8 enables this embodiment to achieve a significant simplification of the disassembly process while achieving the pouring of the floor concrete 93.

[0041] The rigid support frame 1 together with the hanging bolts 7 and the end support bolts 2 are transported back to the processing plant for reuse, and the bottom formwork 3 exists as a part in the floor slab and protects the floor concrete 93 and its internal steel bars 92. The connecting fasteners 5 and the hanging connectors 4 are retained between the cast-in-place floor concrete 93 and the bottom formwork 3 to play a role in pulling.

[0042] Therefore, in the construction process, this embodiment eliminates the need to erect other temporary supports 94, scaffolds and a large number of templates 95, and facilitates and quickly performs on-site pouring of floor concrete 93. After the floor concrete 93 reaches the designed strength, the disassembly is greatly simplified, thereby simplifying the on-site construction process, reducing the on-site labor, and reducing on-site construction garbage and environmental pollution. This embodiment uses the hanging connector 4 as an intermediate connector, which is easy to be processed using common profiles such as flat steel 41, and can be directly connected to the bottom surface using common countersunk self-tapping screws 51, and is bolted to the rigid support frame 1 through welded hanging connector nuts 6. The concrete isolation sleeve 8 can be directly cut from steel pipes, plastic pipes or foam pipes with suitable inner and outer diameters, and all parts can directly use existing hardware. The parts that need to be processed are also simple to process and manufacture, and the overall cost is low.

[0043] Embodiment 2: Fig.11 As shown, the main difference between this embodiment and the first embodiment is that the cross section of the hanging connector 4 is arranged in the shape of a Chinese character "J", the connecting fasteners 5 are respectively arranged between the two bottom sides of the hanging connector 4 and the bottom form 3, and the hanging connection nut 6 is fixedly arranged at the top of the hanging connector 4. The hanging connector 4 can be made of sheet metal, which also has the advantages of simple processing and manufacturing and low cost, and its Chinese character "J" shape can form a stronger tie between the bottom form 3 and the floor concrete 93 after pouring. The height of the hanging connector 4 is preferably consistent with the thickness of the floor concrete 93, so the concrete isolation sleeve 8 does not need to be set outside the hanging bolt 7 in this embodiment.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A steel support formwork for cast-in-place floor slabs that does not require disassembly, assembled between two beams, characterized in that: It comprises a rigid support frame for supporting the two beams, the rigid support frame is provided with end support bolts respectively used for supporting the two beams; a bottom mold resting between the two beams is suspended on the rigid support frame, a hanging connector is provided on the upper surface of the bottom mold, a connecting fastener is provided between the hanging connector and the bottom mold, a hanging connector nut is fixedly provided on the hanging connector, and hanging bolts respectively threadedly connected to the hanging connector nuts are installed on the rigid support frame.

2. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 1, characterized in that: The connecting fasteners include countersunk self-tapping screws that sequentially penetrate the bottom mold and the hanging connecting piece upward.

3. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 1, characterized in that: A mesh cloth is bonded to the bottom surface of the bottom mold.

4. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 1, characterized in that: The bottom mold comprises a wood board layer and an inorganic board layer which are sequentially arranged from top to bottom.

5. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 1, characterized in that: The rigid support frame is provided with hanging installation holes corresponding to each of the hanging bolts, and hanging clamping nuts are fixed at the lower edges of the hanging installation holes. The hanging bolts pass downward through the hanging installation holes and are threadedly connected with the hanging clamping nuts.

6. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 1, characterized in that: The rigid support frame is provided with support mounting holes corresponding to each of the end support bolts, and support clamping nuts are fixed at the lower edges of the support mounting holes. The end support bolts pass downward through the support mounting holes and are threadedly connected with the support clamping nuts.

7. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 1, characterized in that: The outer sleeve of the end support bolt is provided with a concrete isolation sleeve.

8. A steel bracket non-disassembly formwork for a cast-in-place floor slab as claimed in any one of claims 1 to 7, characterized in that: The hanging connector is made of flat steel.

9. The steel bracket non-disassembly formwork for cast-in-place floor slab according to claim 8, characterized in that: The outer sleeve of the hanging bolt is provided with a concrete isolation sleeve.

10. A steel bracket non-disassembly formwork for a cast-in-place floor slab according to any one of claims 1 to 7, characterized in that: The cross section of the hanging connecting piece is arranged in a "X" shape, the connecting fasteners are respectively arranged between the two bottom sides of the hanging connecting piece and the bottom mold, and the hanging connecting nut is fixedly arranged at the top end of the hanging connecting piece.

Images