High-efficiency supporting structure of hollow prefabricated floor

Abstract

The application provides a kind of hollow prefabricated floor high-efficiency support structure for supporting prefabricated floor body, comprising: at least two steel cables, support between the steel cable and prefabricated floor body is provided, support is abutted to the middle of prefabricated floor body, and is erected on each steel cable;Two fasteners, two fasteners are respectively fixed in the two ends of prefabricated floor body, and are respectively connected to the two ends of each steel cable, for tightening the steel cable.When the middle of prefabricated floor body is stressed, the force is transmitted to the two ends of prefabricated floor body through the support at the bottom of prefabricated floor body, so that prefabricated floor body forms a force main body, which meets the current floor support requirements, the whole support structure is relatively simple, only needs to install the steel cable between the fastener and to provide installation position for support, not only reduces the use of steel, but also reduces the size of steel, without using other lifting auxiliary equipment to match construction, reduces the cost and improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of floor slab support technology, and in particular to a high-efficiency support structure for hollow precast floor slabs. Background Technology

[0002] In some older buildings, due to their age and changes in user needs, the functional layout of the buildings has been altered. In addition, the increasing number of machines and equipment has led to a continuous increase in the load on the entire building, exceeding the original design load value. Most of these older buildings have hollow precast floor slabs, which have insufficient reinforcement, poor overall integrity, and are only connected to the frame structure at the end lap joints. Their mid-span bending moment resistance is extremely poor, and their seismic performance is far from meeting the requirements of current codes. Therefore, it is currently necessary to strengthen the floor slabs for seismic resistance to meet the support requirements.

[0003] Currently, the support method for hollow precast floor slabs is basically to add steel beams at the bottom of the floor slab. The steel beams need to be cut, lowered and drilled in the early stage so that the steel beams can be fixed to the concrete structural beams by post-installed embedded parts. The steel beams need to use high-grade steel, and rust prevention and fireproof coating are required afterward. The overall material price is relatively high, and the steel material is relatively heavy. During installation, it is necessary to use cranes and other handling equipment, which not only increases costs, but also takes time and effort and reduces efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-efficiency support structure for hollow precast floor slabs. This structure solves the problems of high cost and reduced efficiency caused by the use of steel to support hollow precast floor slabs during installation, which requires the use of cranes and other handling equipment.

[0005] According to an embodiment of the present invention, a high-efficiency support structure for hollow precast floor slabs is provided for supporting precast floor slabs, comprising:

[0006] There are at least two steel cables, and there are supporting members between the steel cables and the precast floor slab. The supporting members abut against the middle of the precast floor slab and are erected on each steel cable.

[0007] Two fasteners are fixed at both ends of the precast floor slab and connected to both ends of each steel cable to tighten the steel cables.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] In this design, two fasteners are respectively placed at both ends of the precast floor slab, corresponding to the overlapping positions of the precast floor slab ends. A steel cable is connected between the two fasteners, forming a closed space with the precast floor slab, fasteners, and steel cable. A support member is then placed within this space, and the steel cable is tightened by the fasteners. This causes the support member to be subjected to the force from the steel cable, which is then transmitted to the bottom of the precast floor slab. Consequently, the middle of the precast floor slab experiences an upward supporting force. Furthermore, when the middle of the precast floor slab is under stress, the force can also be transmitted through the support member at its bottom. The system provides support and transfers the force to both ends of the precast floor slab, making it a load-bearing structure that meets current floor slab support requirements. Furthermore, the entire support structure is relatively simple; only fasteners and steel cables need to be installed to provide installation positions for the support components. The support components only need to abut against the bottom center of the precast floor slab to complete the support, reducing steel usage and size. It also eliminates the need for additional lifting equipment, controlling costs and improving work efficiency.

[0010] Preferably, the fastener includes two fixed cylinders mirror-mounted at the ends of the precast floor slab, a connecting rod connecting the two fixed cylinders, a fastening screw rotatably mounted on the connecting rod, and an L-shaped rod passing through the fixed cylinders. A threaded sleeve is fixed between the two L-shaped rods, and the threaded sleeve is threadedly connected to the fastening screw. A steel cable is mounted on the L-shaped rod.

[0011] Preferably, a reinforcing bar is fixed at the corner of the L-shaped bar so that the cross-section of the corner of the L-shaped bar is a closed triangular structure.

[0012] Preferably, the L-shaped rod is provided with several limiting rings, and the steel cable is located between two adjacent limiting rings.

[0013] Preferably, there are two steel cables, and the supporting components include an I-beam and columns at both ends of the I-beam. The two columns are respectively mounted on the two steel cables, and the I-beam abuts against the middle of the precast floor slab.

[0014] Preferably, the column includes support rods rotatably disposed on both sides of the web of the I-beam, and the flange of the I-beam is provided with a limiting seat. The two support rods abut against the two limiting seats respectively, so that the two support rods have an included angle.

[0015] Preferably, the end of the support rod is rotatably provided with a mounting seat, the mounting seat has a groove, the groove is engaged with the steel cable, and the mounting seat is provided with a limiting bolt to limit the steel cable within the groove.

[0016] Preferably, both ends of the groove have arc-shaped surfaces.

[0017] Preferably, the I-beam has slots corresponding to several support rods. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention.

[0019] Figure 2 This is a bottom-view structural diagram of an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the fastener structure in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the support member in an embodiment of the present invention.

[0022] In the above attached figures: 1. Precast floor slab; 2. Steel cable; 3. Support component; 301. I-beam; 302. Support rod; 303. Mounting base; 304. Limiting bolt; 305. Slot; 306. Limiting seat; 307. Curved surface; 4. Fastener; 401. Fixing cylinder; 402. Connecting rod; 403. Fastening screw; 404. L-shaped rod; 405. Reinforcing rod; 406. Limiting ring; 407. Threaded sleeve. Detailed Implementation

[0023] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 and Figure 2 As shown, this embodiment of the invention proposes a high-efficiency support structure for hollow precast floor slabs, used to support precast floor slab body 1, comprising:

[0025] At least two steel cables 2 are provided, and a support member 3 is provided between the steel cables 2 and the precast floor slab 1. The support member 3 abuts against the middle of the precast floor slab 1 and is erected on each steel cable 2.

[0026] Two fasteners 4 are fixed at both ends of the precast floor slab 1 and connected to both ends of each steel cable 2 to tighten the steel cable 2.

[0027] In the embodiments of the present invention, fasteners 4 are first installed at both ends of the precast floor slab 1, with their installation positions corresponding to the overlapping positions of the ends of the precast floor slab 1. When the fasteners 4 are under force, they transmit the force to the overlapping ends of the precast floor slab 1. Then, steel cables 2 are erected, placed between two fasteners 4 and connected, so that the precast floor slab 1, fasteners 4, and steel cables 2 form a closed space. Then, support members 3 are placed in this space. In the initial installation state of steel cables 2, the distance between the middle part of the cable and the middle part of the precast floor slab 1 is greater than the height of support members 3. Therefore, by adjusting the fasteners 4, the two fasteners 4 pull on the two ends of the steel cables 2, so that the steel cables 2 gradually tighten and apply force to the support members 3. This force is transmitted to the bottom of the precast floor slab 1, so that the middle part of the precast floor slab 1 receives an upward supporting force.

[0028] After the fasteners 4, steel cables 2, and support members 3 are installed, when the middle of the precast floor slab 1 is under stress, it can support the bottom of the precast floor slab 1 and transfer the force to both ends of the precast floor slab 1, so that the precast floor slab 1 forms a load-bearing body, which meets the current floor slab support requirements. Moreover, the entire support structure is simple and easy to install. Only the fasteners 4 and the steel cables 2 need to be installed to provide an installation position for the support members 3. The support members 3 only need to abut against the middle of the bottom of the precast floor slab 1 to complete the support of the precast floor slab 1. This not only reduces the use of steel but also reduces the size of the steel. No other lifting auxiliary equipment is needed for construction, which controls costs and improves work efficiency. In order to ensure good support for the support members 3, more than two steel cables 2 are arranged.

[0029] Based on the above solutions, such as Figure 1 and Figure 3 As shown, the fastener 4 includes two fixed cylinders 401 mirror-mounted at the end of the precast floor slab 1, a connecting rod 402 connecting the two fixed cylinders 401, a fastening screw 403 rotatably mounted on the connecting rod 402, and an L-shaped rod 404 passing through the fixed cylinders 401. A threaded sleeve 407 is fixedly mounted between the two L-shaped rods 404. The threaded sleeve 407 is threadedly connected to the fastening screw 403. The steel cable 2 is mounted on the L-shaped rod 404.

[0030] First, fastener 4 is installed. During installation, the precast floor slab 1 is laid out and positioned, and holes are drilled. The drilling position is offset from the original reinforcement arrangement position of the precast floor slab 1 to avoid structural damage. After drilling, the loose layer inside the hole is removed with a steel brush, and then the dust inside the hole is blown clean with an air compressor to ensure that the hole is clean and dust-free. After cleaning the hole, the clean hole is sealed with cotton yarn to prevent secondary pollution, thereby improving project efficiency. The hole is opened in an inclined direction, which not only can adapt to the arrangement direction of the steel cable 2, but also increases the contact area between the precast floor slab 1 and the L-shaped rod 404. Then, the chemical anchoring agent is placed into the hole. The fixing cylinders 401 at both ends of the connecting rod 402 are then slowly inserted into the hole, with only a small amount of adhesive overflowing onto the surface. The fixing cylinders 401 must not be disturbed before the chemical anchoring agent has cured. After the fixing cylinders 401 at both ends of the precast floor slab 1 are fixedly installed, the two ends of the steel cable 2 can be fixedly installed on the L-shaped rods 404 located on the fixing cylinders 401. Installation methods include, but are not limited to, welding and wrapping. After the support 3 is placed on the two steel cables 2, the fastening screws 403 are tightened by rotating them. 403 is rotatably mounted on the connecting rod 402, so that it only rotates on the connecting rod 402 and does not move. Therefore, under the transmission of the fastening screw 403, the threaded sleeve 407 drives the L-shaped rods 404 at both ends to move synchronously into the fixed cylinder 401. While the L-shaped rods 404 are moving, the steel cable 2 installed on them is pulled until the steel cable 2 is taut and the fastening screw 403 can no longer be adjusted. Then the adjustment of the fastening screw 403 is canceled, thereby ensuring that the support 3 is firmly abutted against the bottom of the precast floor slab 1, and the installation of the support 3 is completed.

[0031] Specifically, such as Figure 2 As shown, a reinforcing rod 405 is fixedly provided at the corner of the L-shaped rod 404 so that the cross-section of the corner of the L-shaped rod 404 forms a closed triangular structure. After the L-shaped rod 404 is processed, a reinforcing rod 405 is welded at the corner position of the L-shaped rod 404. When the L-shaped rod 404 is subjected to the tension of the steel cable 2, the structural strength can be increased by the action of the reinforcing rod 405, and a triangular structure is formed, which improves the compressive strength of the L-shaped rod 404 and ensures an efficient support effect.

[0032] Specifically, such as Figure 2 As shown, the L-shaped rod 404 is provided with several limiting rings 406, and the steel cable 2 is located between two adjacent limiting rings 406. The two adjacent limiting rings 406 form an installation position for installing the steel cable 2. When the steel cable 2 is installed between the two limiting rings 406, it will not be in a lateral position on the L-shaped rod 404, thus ensuring the stability of the steel cable 2 after installation.

[0033] Based on the above solutions, such as Figure 1 and Figure 4As shown, there are two steel cables 2, and the support member 3 includes an I-beam 301 and columns at both ends of the I-beam 301. The two columns are respectively supported on the two steel cables 2, and the I-beam 301 abuts against the middle of the precast floor slab 1. Taking the arrangement of two steel cables 2 as an example, the steel cables 2 are respectively arranged on both sides of the precast floor slab 1. At the same time, when the flange of the I-beam 301 abuts against the bottom of the precast floor slab 1 at a position close to the center, and the columns at both ends of the I-beam 301 are respectively supported on the two steel cables 2, the overall shape of the I-beam 301 and the columns is T-shaped, so that the steel cables 2 form a V-shape after being taut, ensuring the normal force transmission effect of the steel cables 2 and indirectly improving the stability of the support for the precast floor slab 1.

[0034] Secondly, such as Figure 4 As shown, the column includes support rods 302 rotatably mounted on both sides of the web of the I-beam 301. Limiting seats 306 are provided on the flanges of the I-beam 301. The two support rods 302 abut against the two limiting seats 306 respectively, so that the two support rods 302 have an included angle. To increase the contact area between the column and the steel cable 2, the column is composed of two support rods 302. Rotating shafts are welded to both sides of the web of the I-beam 301, and then the two support rods 302 are rotatably mounted onto the rotating shafts, allowing the support rods 302 to rotate. The limiting seats 306 welded to the flanges of the I-beam 301 limit the rotational position of the support rods 302, preventing excessive displacement. When the support member 3 is erected, the two support rods 302 are opened, forming an included angle, allowing the unfolded two support rods 302 to be directly erected in the steel cable 2. The unfolded support rods 302 form an obtuse angle, preventing them from closing when the steel cable 2 applies force, ensuring normal use.

[0035] like Figure 2 As shown, the end of the support rod 302 is rotatably provided with a mounting base 303. The mounting base 303 has a groove that engages with the steel cable 2, and a limiting bolt 304 passes through the mounting base 303 to limit the steel cable 2 within the groove. The mounting base 303 has a U-shaped groove, which allows it to engage with the steel cable 2 when it is mounted on the steel cable 2. This prevents the steel cable 2 from moving when supporting the entire support member 3, keeping it in the groove and improving the stability of the installation. Furthermore, when the steel cable 2 is placed in the groove, the limiting bolt 304 passes through the groove to further limit the steel cable 2, preventing the support member 3 from falling off.

[0036] Specifically, such as Figure 2 As shown, both ends of the groove have arc-shaped surfaces 307; this guides the steel cable 2 at the opening of the groove and increases the contact area between the groove opening and the steel cable 2, thus preventing the steel cable 2 from breaking.

[0037] Specifically, such as Figure 2As shown, the I-beam 301 has slots 305 corresponding to several support rods 302; with the cooperation of the slots 305, the support rods 302 can be directly engaged in the slots 305, thereby reducing the area occupied by the support member 3, and making it convenient for storage and transportation after batch processing.

[0038] In summary, this solution, through the action of steel cable 2 and support member 3, can transfer the pressure on the middle of the precast floor slab 1 to both ends of the precast floor slab 1, and then bear the load through the overlapping beams at both ends of the precast floor slab 1, making the precast floor slab 1 a load-bearing body, improving the overall load-bearing capacity of the precast floor slab 1, meeting the usage requirements. Furthermore, all the structural materials used are commonly used in civil construction and structural reinforcement construction (301 I-beams, bolts, etc.), and the structure is simple, easy to operate, convenient for construction personnel, occupies less space, and produces less noise and pollution.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-efficiency support structure for hollow precast floor slabs, used to support precast floor slab bodies (1), characterized in that, include: At least two steel cables (2), with a support member (3) between the steel cable (2) and the precast floor slab (1), the support member (3) abutting against the middle of the precast floor slab (1) and erected on each of the steel cables (2); Two fasteners (4) are respectively fixed at both ends of the precast floor slab (1) and respectively connected to both ends of each steel cable (2) for tightening the steel cable (2); The fastener (4) includes two fixed cylinders (401) mirror-mounted at the end of the precast floor slab (1), a connecting rod (402) connecting the two fixed cylinders (401), a fastening screw (403) rotatably mounted on the connecting rod (402), and an L-shaped rod (404) passing through the fixed cylinder (401). A threaded sleeve (407) is fixedly provided between the two L-shaped rods (404), and the threaded sleeve (407) is threadedly connected to the fastening screw (403). The steel cable (2) is mounted on the L-shaped rod (404). The steel cable (2) consists of two cables, and the support member (3) includes an I-beam (301) and columns at both ends of the I-beam (301). The two columns are respectively mounted on the two steel cables (2), and the I-beam (301) abuts against the middle of the precast floor slab (1). The column includes support rods (302) rotatably disposed on both sides of the web of the I-beam (301). The flange of the I-beam (301) is provided with a limiting seat (306). The two support rods (302) respectively abut against the two limiting seats (306) so that the two support rods (302) have an included angle.

2. The high-efficiency support structure for hollow precast floor slabs according to claim 1, characterized in that, A reinforcing rod (405) is fixedly provided at the corner of the L-shaped rod (404) so ​​that the cross-section of the corner of the L-shaped rod (404) is a closed triangular structure.

3. The high-efficiency support structure for hollow precast floor slabs according to claim 1, characterized in that, The L-shaped rod (404) is provided with several limiting rings (406), and the steel cable (2) is located between two adjacent limiting rings (406).

4. The high-efficiency support structure for hollow precast floor slabs according to claim 1, characterized in that, The end of the support rod (302) is rotatably provided with a mounting seat (303), the mounting seat (303) has a groove, the groove is engaged with the steel cable (2), and the mounting seat (303) is provided with a limiting bolt (304) for limiting the steel cable (2) to the groove.

5. The high-efficiency support structure for hollow precast floor slabs according to claim 4, characterized in that, Both ends of the groove have arc-shaped surfaces (307).

6. The high-efficiency support structure for hollow precast floor slabs according to claim 1, characterized in that, The I-beam (301) has slots (305) corresponding to a plurality of the support rods (302).

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