Bracket for filling joint of post-cast strip between laminated slabs

Abstract

The utility model discloses a post-cast strip seam filling support between laminated slabs, which comprises filling iron plates, back beams and a hanging bracket assembly, the hanging bracket assembly comprises a pulling plate, a hanging beam, a supporting bolt and a pulling bolt, the gap between adjacent laminated slabs is filled with a plurality of sections of butted filling iron plates, the lower surfaces of the filling iron plates support a plurality of back beams, and the back beams support the lower surfaces of the filling iron plates. Two pulling bolts are fixed in the middle of the pulling plate, the two pulling bolts movably penetrate through the filling iron plates close to the ends, a base plate is correspondingly laid on the edge of each adjacent composite floor slab, the bottom ends of the supporting bolts abut against the base plates, and the bottoms of the butt joint ends of the adjacent filling iron plates are connected through a clamping structure. The use of turnover materials such as steel pipe scaffolds is reduced, the template installation efficiency is improved, the construction interval time is shortened, and the support is simple in structure, convenient to assemble, low in manufacturing cost and suitable for application and popularization.

Description

Technical Field

[0001] This utility model relates to the field of composite floor slab technology, and in particular to a filler bracket for the joint of post-cast strips between composite slabs. Background Technology

[0002] Prefabricated building structures offer advantages such as high efficiency and speed, cost-effectiveness and environmental friendliness, controllable quality, flexibility and versatility, reusability, standardized production, flexible assembly, and convenient construction, making them a widely promoted housing construction method in China. During construction, "composite floor slabs" are primarily used as horizontal load-bearing components, characterized by being lightweight yet high-strength, providing thermal insulation, exhibiting good fire resistance, cost-effectiveness and environmental friendliness, good seismic performance, and easy installation. However, the composite floor slabs in each room are not tightly connected during installation. To facilitate installation, a certain width of gap needs to be reserved when installing multiple composite floor slabs; this gap is called a post-pouring strip. After all the composite floor slabs are installed, formwork is erected, reinforcing bars are tied, and the slabs are poured together with the cast-in-place concrete above, forming a prefabricated monolithic floor slab.

[0003] Traditional post-pouring strip formwork erection requires separate scaffolding and specialized formwork, which is cumbersome, time-consuming, and inefficient. Furthermore, the scaffolding in this area hinders the movement and operation of construction workers. When reinforcing the post-pouring strip formwork, it may not fit tightly with the overlapping floor slabs on both sides, leading to grout leakage during concrete pouring. After demolding, the joint between the post-pouring strip and the overlapping floor slabs on both sides may be uneven, requiring personnel to handle it during subsequent decoration and finishing, resulting in material waste and excessive labor costs. Utility Model Content

[0004] This utility model aims to solve, at least to a certain extent, one of the technical problems in the related art. To this end, one objective of this utility model is to provide a filling bracket for the joint of the post-cast strip between composite slabs, which solves the problems of poor fit between the post-cast strip formwork and the composite floor slabs on both sides during reinforcement, easy leakage of grout during concrete pouring, and unevenness at the joint between the post-cast strip and the composite floor slabs on both sides after demolding.

[0005] According to this utility model, a filling bracket for the joint of the post-cast strip between composite slabs includes a filling iron plate, a back beam, and a hanger assembly. The hanger assembly includes a pull plate, a hanger beam, a support bolt, and a pull bolt. Multiple sections of butt-jointed filling iron plates are used to fill the gap between adjacent composite slabs. The lower surface of the filling iron plate supports multiple back beams. Two pull bolts are fixed in the middle of the pull plate. The two pull bolts movably pass through the filling iron plate near the end. The top of the pull bolt has a segmented bolt rod that passes through the hanger beam and has a nut screwed on the bolt rod above the hanger beam. A pad is laid at the edge of each adjacent composite slab. The bottom end of the support bolt rests against the pad and the top end has a bolt rod that passes through both ends of the hanger beam. The bolt rod at the top of the support bolt has a nut screwed on it above the hanger beam. The bottom of the butt joint of the adjacent filling iron plates is connected by a snap-fit ​​structure.

[0006] In some embodiments of this utility model, the top end of the support bolt at the connection position with the bolt rod abuts against the lifting beam, while the top end of the pull bolt at the connection position with the bolt rod does not contact the lifting beam.

[0007] In some other embodiments of this utility model, a support square plate is welded to the bottom end of the support bolt.

[0008] In some other embodiments of this utility model, the sum of the thickness of the filling iron plate and the back beam is equal to the thickness of the composite floor slab.

[0009] In some other embodiments of this utility model, the snap-fit ​​structure includes two square tube sleeves and a U-shaped connecting rod. Three sets of square tube sleeves are provided at the bottom of the joint ends of adjacent filling iron plates. The square tube sleeves are welded to the bottom of the end of the filling iron plate. The two vertical rods of the U-shaped connecting rod are inserted into one set of square tube sleeves respectively.

[0010] In some other embodiments of this utility model, the filling iron plate is a galvanized iron plate with a thickness of 3-5mm, and the back beam is a stainless steel square tube with a wall thickness of 3-5mm.

[0011] In this utility model, the support replaces the traditional method of separately supporting the post-pouring strip formwork, reducing the use of turnover materials such as steel pipe scaffolding, speeding up the formwork installation efficiency, and shortening the construction interval time. The support has a simple structure, is easy to assemble, has a low cost, and is suitable for widespread application. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1This is a schematic diagram of the upper structure of a support for filling the joint of the post-cast strip between composite slabs proposed in this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of a support for filling the joint of the post-cast strip between composite slabs proposed in this utility model.

[0015] Figure 3 This is a bottom view of a support for filling the joint of the post-cast strip between composite slabs according to the present invention.

[0016] In the diagram: 1. Composite floor slab; 2. Filler plate; 3. Hanging beam; 4. Support bolt; 41. Supporting square plate; 5. Pad plate; 6. Pull bolt; 7. Back beam; 8. Tie plate; 9. U-shaped connecting rod; 10. Square tube sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] Reference Figure 1-3 A filling bracket for the joint of post-cast strips between composite slabs includes a filling iron plate 2, a back beam 7, and a hanger assembly. The hanger assembly includes a pull plate 8, a hanger beam 3, a support bolt 4, and a pull bolt 6. Multiple sections of the filling iron plate 2 are joined together to fill the gap between adjacent composite floor slabs 1. The lower surface of the filling iron plate 2 is supported by multiple back beams 7. Two pull bolts 6 are fixed in the middle of the pull plate 8. The two pull bolts 6 movably pass through the filling iron plate 2 near the end. The top of the pull bolt 6 is provided with a segmented bolt rod that passes through the hanger beam 3 and has a nut screwed on the bolt rod above the hanger beam 3. A pad plate 5 is laid at the edge of each adjacent composite floor slab 1. The bottom end of the support bolt 4 abuts against the pad plate 5, and the top end is provided with a bolt rod that passes through both ends of the hanger beam 3. The bolt rod at the top of the support bolt 4 has a nut screwed on it above the hanger beam. The bottom of the joint ends of the adjacent filling iron plates 2 are connected by a snap-fit ​​structure.

[0020] (1) Material selection

[0021] Main components: 40*90 and 40*50mm galvanized square tubes, 3mm thick galvanized iron sheet, nuts, and 12mm diameter connecting bolts (support bolts and pull bolts).

[0022] Processing and manufacturing

[0023] Taking a 3300mm span composite floor slab as the research object, the post-pouring strip formwork is planned to use one 2000*500mm formwork piece + two 650*500mm formwork pieces for assembly and connection. The assembly is connected by U-shaped pin-type slot (square tube sleeve and U-shaped connecting rod). The formwork hanger adopts I-shaped hanger, and bolts and square tubes are used to form a hanging formwork assembly to replace the traditional single-support formwork construction.

[0024] Step 1: Create a modular template.

[0025] Using a laser cutting tool, the 3mm thick galvanized iron sheet is cut into two rectangular shapes: one 2000*500mm piece and two 650*500mm pieces, according to the design dimensions.

[0026] Step 2: Fabricating the U-shaped latch-type card slot component

[0027] Use a cutting machine to cut 30*30mm galvanized square tubes into short tubes with a length of 50mm. Weld three short tubes to the end of each rectangular iron plate to form slots for U-shaped pins. Cut 25*25mm galvanized square tubes and weld them into U-shaped pins, which are used to insert into the slots after two rectangular iron plates are spliced ​​together.

[0028] The tie plate is used to hold the filler plate and the back beam (the back beam is spot-welded to the filler plate), so that the upper surface of the filler plate is no more than 5mm different from the surface of the composite floor slab. Since the tie plate is tightly attached to the bottom of the composite floor slab, it is integrated with the composite floor slab to bear the force. The filler plate will not sink when cement is poured.

[0029] The support bolt rests on the pad 5, which is made of cement board or steel plate and is not easily deformed. When the pull bolt is pulled, the pull plate and the hanging beam are tightened, making the pull plate and the hanging beam stable. The filler plate rests on the back beam, and the back beam rests on the pull plate to withstand the poured cement.

[0030] The top of the support bolt 4, at its connection point with the bolt shank, rests against the lifting beam 3, while the top of the pull bolt 6, at its connection point with the bolt shank, does not contact the lifting beam 3. This allows for adjustment of the pulling force of the pull bolt 6. Since the support bolt 4 cannot be adjusted in length, the tighter it is tightened, the greater the pulling force of the pull bolt 6.

[0031] A support plate 41 is welded to the bottom end of the support bolt 4. This increases the support area and prevents the bottom end of the support bolt 4 from inserting into the pad 5.

[0032] The combined thickness of the filling iron plate 2 and the back beam 7 is equal to the thickness of the composite floor slab 1. This facilitates leveling, ensuring a smooth surface after cement pouring.

[0033] The snap-fit ​​structure includes two square tube sleeves 10 and a U-shaped connecting rod 9. Three sets of square tube sleeves 10 are correspondingly provided at the bottom of the joint ends of adjacent filling iron plates 2. The square tube sleeves 10 are welded to the bottom of the ends of the filling iron plates 2. The two vertical rods of the U-shaped connecting rod 9 are inserted into one set of square tube sleeves 10 respectively. The connection is firm and disassembly is convenient.

[0034] The filling iron plate 2 is a galvanized iron plate with a thickness of 3-5mm, and the back beam 7 is a stainless steel square tube with a wall thickness of 3-5mm. Steel plates and steel tubes are not easily deformed, and wooden boards are not suitable for use in the gaps because the gaps are small and easily deformed; therefore, steel plates are used.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A filler bracket for the joint of post-cast strips between composite slabs, characterized in that: The system includes a filler plate (2), a back beam (7), and a hanger assembly. The hanger assembly includes a tie plate (8), a hanger beam (3), support bolts (4), and pull bolts (6). Multiple sections of butt-jointed filler plates (2) are used to fill the gaps between adjacent composite floor slabs (1). Multiple back beams (7) support the lower surface of the filler plate (2). Two pull bolts (6) are fixed in the middle of the tie plate (8), and these two pull bolts (6) movably pass through the filler plate (2) near its end. The top of the pull bolt (6) is provided with a segmented bolt rod that passes through the hanging beam (3) and a nut is screwed on the bolt rod above the hanging beam (3). A pad (5) is laid at the edge of the adjacent composite floor slab (1). The bottom end of the support bolt (4) abuts against the pad (5) and the top end is provided with a bolt rod that passes through both ends of the hanging beam (3). A nut is screwed on the top of the bolt rod of the support bolt (4) above the hanging beam. The bottom of the joint end of the adjacent filling iron plate (2) is connected by a snap-fit ​​structure.

2. The filler bracket for the joint of the post-cast strip between composite slabs according to claim 1, characterized in that: The top of the support bolt (4) at the connection position with the bolt rod rests against the lifting beam (3), while the top of the pull bolt (6) at the connection position with the bolt rod does not contact the lifting beam (3).

3. The filler bracket for the joint of the post-cast strip between composite slabs according to claim 1, characterized in that: A support plate (41) is welded to the bottom end of the support bolt (4).

4. The filler bracket for the joint of the post-cast strip between composite slabs according to claim 1, characterized in that: The sum of the thicknesses of the filling iron plate (2) and the back beam (7) is equal to the thickness of the composite floor slab (1).

5. A filler bracket for the joint of post-cast strips between composite slabs according to claim 1, characterized in that: The snap-fit ​​structure includes two square tube sleeves (10) and a U-shaped connecting rod (9). Three sets of square tube sleeves (10) are provided at the bottom of the joint ends of adjacent filling iron plates (2). The square tube sleeves (10) are welded to the bottom of the end of the filling iron plate (2). The two vertical rods of the U-shaped connecting rod (9) are inserted into a set of square tube sleeves (10).

6. The filler bracket for the joint of the post-cast strip between composite slabs according to claim 1, characterized in that: The filling iron plate (2) is a galvanized iron plate with a thickness of 3-5mm, and the back beam (7) is a stainless steel square tube with a wall thickness of 3-5mm.

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