Hollow floor reconstruction structure and method thereof

Abstract

The invention discloses a hollow floor transformation structure which comprises a bottom plate and a top plate, a steel bar reinforcing mechanism is arranged between the bottom plate and the top plate, a connecting mechanism is arranged in the steel bar reinforcing mechanism, a stable box body mechanism is installed on the connecting mechanism, and the stable box body mechanism comprises a plurality of box bodies. A mounting base is fixedly connected to the bottom end of each box body, two rotating shafts are rotatably connected to the interior of each mounting base, and rotating heads are fixedly connected to the ends of the two rotating shafts. According to the hollow floor transformation structure and the method thereof, the placement arc plate is placed on the reinforcing steel bar, the placement arc plate and the reinforcing steel bar are firmly fixed together through the iron wire, then the box body is placed in, the rotating head is rotated to drive the limiting claws to rotate, the multiple limiting claws are made to be close to one another, the limiting blocks are clamped through the limiting grooves in the limiting claws, and the box body is fixed; and the box body can be effectively prevented from floating during pouring, so that the stability can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to the modification structure and method of hollow floor slabs. Background Technology

[0002] The floor slab is a bending member, with the concrete in the compression zone bearing the compressive force and the steel reinforcement in the tension zone bearing the tensile force. The stress near the neutral axis is very small. To save concrete and reduce the self-weight of the floor slab, the concrete near the neutral axis is removed, leaving the concrete ribs that connect the upper and lower sections to share the load and resist shear, forming a hollow floor slab. The hollow floor slab reduces the self-weight of the floor slab by 40-60% while maintaining 80-90% of the floor slab's stiffness. It achieves the goal of increasing the span of the slab without increasing the concrete and reinforcement, thereby improving the headroom and enhancing the slab's sound insulation and thermal insulation properties. In the existing technology, the hollow floor slab is formed by installing boxes to create cavities. When pouring concrete, the boxes are easily moved by the buoyancy of the concrete, making the installation stability less than ideal.

[0003] For example, patent publication number CN203808330U is specifically a building product, specifically a hollow floor slab box. This utility model's hollow floor slab includes, from top to bottom, an upper cast-in-place slab, a hollow floor slab box, and a lower cast-in-place slab. The hollow floor slab box is set as a hollow cube with a 30mm chamfer. Holes are provided at the top of the box, and cross-shaped grooves are provided at the bottom. Stiffening ribs are provided on the lower cast-in-place slab, and the stiffening ribs cooperate with the bottom plate. This utility model makes full use of the overall bending stiffness of the concrete slab, effectively reducing the project cost. At the same time, the top slab after construction is flat and smooth, reducing the later decoration costs. However, there is a problem with this type of hollow floor slab, where the cavity is formed by installing the box. During concrete pouring, the box is easily moved by the buoyancy of the concrete, making the installation stability less than ideal.

[0004] For example, patent publication number CN205712582U describes a hollow floor slab, including a hollow grid frame and bottom reinforcement mesh tied to the bottom of the hollow grid frame. The hollow grid frame includes several steel reinforcement frames arranged longitudinally and transversely, forming filling positions for filling core molds. The feature is that the steel reinforcement frames at the edges of the hollow grid frame are connected to slide rails perpendicular to the steel reinforcement frames. The slide rails are slidably connected to trays for supporting the core molds, and the trays are located above the filling positions. This utility model is simple to install, mainly because the core mold is placed on the tray and slides along the slide rails to each filling position. Construction workers then fill it into the filling position without needing to lift the core mold, thus facilitating filling. However, this hollow floor slab has a problem: the cavity formed by the installation of boxes inside is easily moved by the buoyancy of the concrete during concrete pouring, resulting in insufficient installation stability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a modified hollow floor slab structure and method, which solves the problem that when hollow floor slabs are filled with installed boxes to form cavities, the boxes are easily moved by the buoyancy of the concrete during pouring, resulting in less than ideal installation stability.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a hollow floor slab modification structure, including a bottom slab and a top slab, wherein a steel reinforcement mechanism is provided between the bottom slab and the top slab, a connecting mechanism is provided inside the steel reinforcement mechanism, and a stabilizing box mechanism is installed on the connecting mechanism; The stabilizing housing mechanism includes multiple housings, each housing having a mounting base fixedly connected to its bottom. Two rotating shafts are rotatably connected inside the mounting base, with rotating heads fixedly connected to the ends of the two rotating shafts. A driving bevel gear is fixedly connected to each rotating shaft. A vertical shaft is located at the bottom of each rotating shaft, with a driven bevel gear fixedly connected to the top of the vertical shaft. A worm gear is fixedly connected to the bottom of the vertical shaft, and a positioning rod is fixedly connected to the bottom of the worm gear. Four support frames are arranged around the vertical shaft, with limiting claws rotatably connected to each support frame. Limiting claws have limiting grooves, and worm wheels are fixedly connected to the ends of the limiting claws. The connecting mechanism includes multiple pairs of placement arc plates. Each pair of two placement arc plates has multiple binding holes. Two connecting rods are fixedly installed between the two placement arc plates. Two limiting rods are fixedly connected to the top of each connecting rod. Multiple limiting blocks are fixedly connected to the limiting rods. A positioning slot is provided at the top of the limiting rod.

[0007] Preferably, the rotating shaft is rotatably connected to the inner wall of the mounting base through multiple bearings, and the two rotating shafts are symmetrically arranged inside the mounting base so that the two rotating shafts can rotate stably.

[0008] Preferably, the rotating head has an internal hexagonal groove, and the rotating head is disposed on the outer surface of the mounting base, so that it can be easily rotated using a hexagonal wrench.

[0009] Preferably, each mounting base has four sets of limiting claws inside, and the four sets of limiting claws correspond one-to-one with four limiting rods, so that the limiting claws can grab the limiting rods, thereby playing a fixing role and preventing floating.

[0010] Preferably, the vertical shaft is rotatably connected to a U-shaped support frame, and the U-shaped support frame and multiple support frames are all fixedly installed inside the mounting base by bolts, so that the U-shaped support frame can provide good support for the vertical shaft.

[0011] Preferably, the top surface of the placement arc plate has two mounting screw holes, and both ends of the connecting rod are fixedly connected to a fixing head. The fixing head is provided with a fixing bolt inside. The length of the fixing bolt is greater than the depth of the fixing head, and the fixing bolt matches the mounting screw hole, so that the connecting rod can be easily replaced.

[0012] Preferably, the steel reinforcement mechanism includes multiple sets of transverse steel bars and multiple sets of longitudinal steel bars. Each set of transverse steel bars is tied with a first fixing steel bar, and each set of longitudinal steel bars is tied with a second fixing steel bar. The multiple sets of longitudinal steel bars and the multiple sets of transverse steel bars are arranged through each other, and the space between the multiple sets of longitudinal steel bars and the multiple sets of transverse steel bars forms an installation groove, which can play a good reinforcing role and improve the strength of the hollow floor slab.

[0013] The method for renovating hollow core slab floors includes the following steps: Step 1: Arrange the support: Use steel pipes to build a base frame to support the formwork. The spacing between the uprights should be ≤1m and the horizontal bar spacing should be ≤1.5m. Step 2, Erecting the formwork: Install the formwork on the base frame, and mark the center line of the box formwork, the edge line of the rib beam, and the pre-embedded pipeline position line on the formwork, with a deviation of ≤5mm; Step 3: Install reinforcing bars: Arrange the horizontal and vertical reinforcing bars according to the lines marked on the template; Step 4: Install the box formwork: Adjust the position of the connecting mechanism, use wire to tie the connecting mechanism plate to the horizontal or vertical reinforcing bars, and then install the stabilizing box mechanism on the connecting mechanism; Step 5: Concrete pouring, curing, and formwork removal.

[0014] This invention provides a hollow floor slab modification structure and method. Compared with the prior art, it has the following advantages: (1) The hollow floor slab modification structure and its method involves placing the arc plate on the reinforcing bar, using wire to firmly fix the arc plate and the reinforcing bar together, then placing the box body in, rotating the rotating head to drive the limiting claw to rotate, so that multiple limiting claws come together, and using the limiting groove on it to hold the limiting block to fix the box body, which can effectively prevent the box body from floating during the pouring, thereby effectively improving stability.

[0015] (2) The hollow floor slab modification structure and its method, by aligning the fixing head with the mounting screw hole and then turning the fixing bolt, the fixing bolt is screwed into the mounting screw hole, so that the connecting rod can be easily replaced.

[0016] (3) The hollow floor slab modification structure and its method increase the transverse strength by using transverse steel bars and longitudinal steel bars to increase the longitudinal strength, which can play a good role in strengthening and improving the strength of the hollow floor slab. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the stabilizing box mechanism of the present invention; Figure 3 This is a schematic diagram of the connection structure between multiple limiting claws of the present invention; Figure 4 This is a schematic diagram of the connection mechanism structure of the present invention; Figure 5 This is a schematic diagram showing the connection between the placement arc and the connecting rod of the present invention; Figure 6 This is a schematic diagram of the steel reinforcement mechanism of the present invention.

[0018] In the diagram: 1. Base plate; 2. Stabilizing box mechanism; 201. Box body; 202. Mounting base; 203. Rotating shaft; 204. Driving bevel gear; 205. Rotating head; 206. Vertical shaft; 207. Driven bevel gear; 208. U-shaped support frame; 209. Worm gear; 210. Positioning rod; 211. Limiting claw; 212. Support frame; 213. Limiting groove; 214. Worm wheel; 3. Top plate; 4. Connecting mechanism; 401. Placement arc plate; 402. Binding hole; 403. Connecting rod; 404. Limiting rod; 405. Limiting block; 406. Positioning slot; 407. Fixing head; 408. Fixing bolt; 409. Mounting screw hole; 5. Reinforcing steel reinforcement mechanism; 501. Transverse reinforcing steel; 502. First fixed reinforcing steel; 503. Longitudinal reinforcing steel; 504. Second fixed reinforcing steel; 505. Mounting groove. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1, please refer to Figures 1-4 This invention provides a technical solution: a hollow floor slab modification structure, including a bottom plate 1 and a top plate 3. A steel reinforcement mechanism 5 is provided between the bottom plate 1 and the top plate 3. A connecting mechanism 4 is provided inside the steel reinforcement mechanism 5. A stabilizing box mechanism 2 is installed on the connecting mechanism 4. The stabilizing box mechanism 2 can be tied to the steel reinforcement mechanism 5 through the connecting mechanism 4 and then fixed to the connecting mechanism 4. This can effectively prevent the box 201 from floating during the pouring process, thereby effectively improving stability.

[0021] The stabilizing housing mechanism 2 includes multiple housings 201, each housing 201 having a mounting base 202 fixedly connected to its bottom end. Two rotating shafts 203 are rotatably connected inside the mounting base 202, and these shafts 203 are rotatably connected to the inner wall of the mounting base 202 via multiple bearings. The two rotating shafts 203 are symmetrically arranged inside the mounting base 202, enabling stable rotation. Rotating heads 205 are fixedly connected to the ends of the two rotating shafts 203, and each rotating head 205 has an internal hexagonal opening. A recessed groove is provided on the outer surface of the mounting base 202, allowing for easy rotation using a hex wrench. A driving bevel gear 204 is fixedly connected to the rotating shaft 203. A vertical shaft 206 is located at the bottom of the rotating shaft 203, and a driven bevel gear 207 is fixedly connected to the top of the vertical shaft 206. The driving bevel gear 204 meshes with the driven bevel gear 207, enabling the rotating shaft 203 to drive the vertical shaft 206 to rotate. A worm gear 20 is fixedly connected to the bottom of the vertical shaft 206. 9. A positioning rod 210 is fixedly connected to the bottom end of the worm gear 209. Four support frames 212 are provided around the vertical shaft 206. A U-shaped upright 208 is rotatably connected to the outside of the vertical shaft 206. The U-shaped upright 208 and the multiple support frames 212 are all fixedly installed inside the mounting base 202 by bolts, so that the U-shaped upright 208 can provide good support for the vertical shaft 206. A limit claw 211 is rotatably connected to the support frame 212. The limit claw 211 has a limit groove 213. Matching the limiting block 405, the limiting claw 211 can lock the limiting block 405 through the limiting groove 213, thus playing a good limiting and fixing role. The end of the limiting claw 211 is fixedly connected to the worm wheel 214. The worm 209 is located between multiple worm wheels 214, and the worm 209 meshes with multiple worm wheels 214, so that when the worm 209 rotates, it can drive multiple worm wheels 214 to rotate at the same time, so that multiple worm wheels 214 can drive multiple limiting claws 211 to close and separate.

[0022] The connecting mechanism 4 includes multiple pairs of placement arc plates 401. Each pair of placement arc plates 401 has multiple binding holes 402. The binding method is to pass one end of an iron wire through a binding hole 402 from top to bottom, through the bottom of the reinforcing bar, and then through the binding hole 402 on the other side, so that both ends of the iron wire are at the top of the placement arc plate 401. Then, pliers are used to twist the two ends of the iron wire together to firmly fix the placement arc plate 401 and the reinforcing bar together, preventing the placement arc plate 401 from moving and improving stability. Two connecting rods 403 are fixedly installed between the arc plates 401. Two limiting rods 404 are fixedly connected to the top of each connecting rod 403. The limiting claws 211 inside each mounting base 202 are set into four groups. The four groups of limiting claws 211 correspond one-to-one with the four limiting rods 404, so that the limiting claws 211 can grab the limiting rods 404, thereby playing a fixing role and preventing floating. Multiple limiting blocks 405 are fixedly connected to the limiting rods 404. The top of the limiting rods 404 is provided with positioning slots 406.

[0023] The method for renovating hollow core slab floors includes the following steps: Step 1: Arrange the support: Use steel pipes to build a base frame to support the formwork. The spacing between the uprights should be ≤1m and the horizontal bar spacing should be ≤1.5m. Step 2, Erecting the formwork: Install the formwork on the base frame, and mark the center line of the box formwork, the edge line of the rib beam, and the pre-embedded pipeline position line on the formwork, with a deviation of ≤5mm; Step 3: Install the reinforcing bars: Arrange the horizontal reinforcing bars 501 and the longitudinal reinforcing bars 503 according to the lines marked on the template; Step 4: Install the box formwork: Adjust the position of the connecting mechanism 4, use wire to tie the connecting mechanism 4 plate to the transverse steel bar 501 or the longitudinal steel bar 503, and then install the stabilizing box mechanism 2 on the connecting mechanism 4. Step 5: Concrete pouring, curing, and formwork removal.

[0024] Example 2, please refer to Figure 1 and Figure 5 The top surface of the arc plate 401 has two mounting screw holes 409. Both ends of the connecting rod 403 are fixedly connected to a fixing head 407. The fixing head 407 has a fixing bolt 408 inside. The length of the fixing bolt 408 is greater than the depth of the fixing head 407, and the fixing bolt 408 matches the mounting screw hole 409. The connecting rod 403 can be easily replaced by aligning the fixing head 407 with the mounting screw hole 409 and then turning the fixing bolt 408.

[0025] Example 3, please refer to Figure 1 and Figure 6The steel reinforcement mechanism 5 includes multiple sets of transverse steel bars 501 and multiple sets of longitudinal steel bars 503. Each set of transverse steel bars 501 is tied with a first fixing steel bar 502, and each set of longitudinal steel bars 503 is tied with a second fixing steel bar 504. The multiple sets of longitudinal steel bars 503 and multiple sets of transverse steel bars 501 are connected through each other, and the space between the multiple sets of longitudinal steel bars 503 and multiple sets of transverse steel bars 501 forms an installation groove 505. The transverse strength can be increased by the transverse steel bars 501, and the longitudinal strength can be increased by the longitudinal steel bars 503, so that it can play a good reinforcing role and improve the strength of the hollow floor slab.

[0026] In use, the transverse reinforcing bars 501 and longitudinal reinforcing bars 503 are fixed to the base plate 1. Then, the placement arc plate 401 is placed on the reinforcing bars. One end of the wire is passed through a binding hole 402 from top to bottom, through the bottom of the reinforcing bar, and then through the binding hole 402 on the other side, so that both ends of the wire are at the top of the placement arc plate 401. Then, the two ends of the wire are twisted together with pliers to firmly fix the placement arc plate 401 to the reinforcing bars, preventing the placement arc plate 401 from moving and improving stability. Then, the box 201 is placed in, so that the positioning rod 210 is inserted into the limiting rod 4. In the positioning slot 406 on 04, the limiting claw 211 is positioned outside the limiting rod 404. Then, the rotating head 205 is rotated, which drives the vertical shaft 206 to rotate. The vertical shaft 206 rotates, which drives the worm gear 209 to rotate. The worm gear 209 rotates, which drives the worm wheel 214 to rotate. The worm wheel 214 rotates, which drives the limiting claw 211 to rotate. This causes multiple limiting claws 211 to come closer together and use their limiting grooves 213 to hold the limiting block 405 in place, thus fixing the box body 201. This effectively prevents the box body 201 from floating during casting, thereby effectively improving stability.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for retrofitting a hollow floor, comprising a bottom plate (1) and a top plate (3), characterized in that: The bottom plate (1) and the top plate (3) are provided with a reinforcing mechanism (5), and the reinforcing mechanism (5) is internally provided with a connecting mechanism (4), and the connecting mechanism (4) is provided with a stable box mechanism (2). The stable box mechanism (2) comprises a plurality of boxes (201), and the bottom end of each box (201) is fixedly connected with a mounting base (202); the mounting base (202) is internally rotatably connected with two rotating shafts (203); the end of the two rotating shafts (203) is fixedly connected with a rotating head (205); the rotating shaft (203) is fixedly connected with a driving bevel gear (204); the bottom of the rotating shaft (203) is provided with a vertical shaft (206); the top end of the vertical shaft (206) is fixedly connected with a driven bevel gear (207); the bottom end of the vertical shaft (206) is fixedly connected with a worm (209); the bottom end of the worm (209) is fixedly connected with a positioning rod (210); the vertical shaft (206) is provided with four support frames (212); the support frame (212) is rotatably connected with a limiting claw (211); the limiting claw (211) is provided with a limiting groove (213); and the end of the limiting claw (211) is fixedly connected with a worm wheel (214). The connecting mechanism (4) comprises a plurality of pairs of placement arc plates (401), each pair of two placement arc plates (401) is provided with a plurality of binding holes (402), and two placement arc plates (401) are fixedly connected with two connecting rods (403); the top of each connecting rod (403) is fixedly connected with two limiting rods (404); the limiting rod (404) is fixedly connected with a plurality of limiting blocks (405); and the top end of the limiting rod (404) is provided with a positioning slot (406).

2. The hollow floor deck retrofit structure of claim 1, wherein: The rotating shaft (203) is rotatably connected with the inner wall of the mounting base (202) through a plurality of bearings, and the two rotating shafts (203) are symmetrically arranged in the mounting base (202).

3. The hollow floor deck retrofit structure of claim 1, wherein: The rotating head (205) is provided with an internal hexagonal groove, and the rotating head (205) is arranged on the outer side surface of the mounting base (202).

4. The hollow floor deck retrofit structure of claim 1, wherein: The limiting claws (211) in each mounting base (202) are arranged as four groups, and the four limiting claws (211) correspond to the four limiting rods (404) one by one.

5. The hollow floor deck retrofit structure of claim 1, wherein: The vertical shaft (206) is rotatably connected with a U-shaped stand (208), and the U-shaped stand (208) and the plurality of support frames (212) are fixedly installed in the mounting base (202) through bolts.

6. The hollow floor deck retrofit structure of claim 1, wherein: The top surface of the placement arc plate (401) is provided with two mounting screw holes (409), and the two ends of the connecting rod (403) are fixedly connected with a fixed head (407).

7. The hollow floor deck retrofit structure of claim 6, wherein: The fixed head (407) is internally provided with a fixed bolt (408), the length of the fixed bolt (408) is greater than the depth of the fixed head (407), and the fixed bolt (408) is matched with the mounting screw hole (409).

8. The hollow floor deck retrofit structure of claim 1, wherein: The steel reinforcement mechanism (5) includes multiple sets of transverse steel bars (501) and multiple sets of longitudinal steel bars (503). Each set of transverse steel bars (501) is tied with a first fixed steel bar (502), and each set of longitudinal steel bars (503) is tied with a second fixed steel bar (504).

9. The hollow floor deck retrofit structure of claim 8, wherein: Multiple sets of longitudinal reinforcing bars (503) and multiple sets of transverse reinforcing bars (501) are arranged through each other, and the space between the multiple sets of longitudinal reinforcing bars (503) and multiple sets of transverse reinforcing bars (501) forms an installation groove (505).

10. Method for the retrofitting of a hollow floor, characterized in that: Includes the following steps: Step 1: Arrange the support: Use steel pipes to build a base frame to support the formwork. The spacing between the uprights should be ≤1m and the horizontal bar spacing should be ≤1.5m. Step 2, Erecting the formwork: Install the formwork on the base frame, and mark the center line of the box formwork, the edge line of the rib beam, and the pre-embedded pipeline position line on the formwork, with a deviation of ≤5mm; Step 3: Install the reinforcing bars: Arrange the horizontal reinforcing bars (501) and the longitudinal reinforcing bars (503) according to the lines marked on the template. Step 4: Install the box formwork: Adjust the position of the connecting mechanism (4), use wire to tie the connecting mechanism (4) plate to the transverse steel bar (501) or the longitudinal steel bar (503), and then install the stabilizing box mechanism (2) on the connecting mechanism (4); Step 5: Concrete pouring, curing, and formwork removal.

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