Construction method for reinforcing floor slab

Abstract

The invention relates to the field of building construction engineering, in particular to a construction method for reinforcing a floor slab. The method specifically comprises the following steps that S1, a reinforcing steel beam is provided, and the reinforcing steel beam is placed below a to-be-fixed position; s2, providing an electric hoist, placing the electric hoist on the top surface of the floor slab, and enabling the electric hoist to be located right above the reinforcing steel beam; s3, the lower end of a lifting rope on an electric hoist downwards penetrates through the floor slab and is connected with the reinforcing steel beam, and then the lifting rope is controlled by the electric hoist to pull the reinforcing steel beam to move upwards till the reinforcing steel beam abuts against the bottom face of the floor slab; s4, the camber of the reinforcing steel beam is adjusted, and the lifting rope is detached from the reinforcing steel beam; and S5, the reinforcing steel beams are fixed to the bottom face of the floor slab. The method has the beneficial effects that the reinforcing steel beam is arranged at the bottom of the floor, the electric hoist lifts the reinforcing steel beam to the bottom face of the floor, the floor and the reinforcing steel beam are fixed together, and therefore reinforcing of the floor is achieved.

Description

Technical Field

[0001] The invention relates to the field of building construction engineering, in particular to a construction method for reinforcing a floor slab. Background Art

[0002] Nowadays, in the construction field, the relatively new construction methods for floor reinforcement include sticking carbon fiber cloth on the bottom surface of the floor and sticking steel on the bottom surface of the floor. However, these two reinforcement construction methods have many disadvantages, such as high cost, high subsequent maintenance cost, difficult process, extremely strict requirements on construction quality, need to deal with the bottom base of the whole span of the slab, which has a great impact on the surrounding environment, and limited improvement of the bearing capacity of the floor.

[0003] The traditional method of strengthening the floor slab is to add a structural beam in the middle of the floor slab to reduce the load span of the floor slab, so as to achieve the purpose of improving the bearing capacity of the floor slab. The most reliable construction method of adding a structural beam in the middle of the floor slab is to first unload the floor slab (that is, the floor slab is not subjected to any load except its own weight), set up a top support frame at the bottom of the floor slab, then chisel out the floor slab concrete where the structural beam is to be added, tie the steel bars of the newly added structural beam and plant the steel bars at both ends, and finally restore the original state after the concrete is poured and formed.

[0004] If the construction method of directly adding steel beams at the bottom of the slab is adopted to reduce the load span of the floor slab, firstly, it is difficult to hoist the steel beams in the upper and lower closed floors. In addition, the steel beams cannot be guaranteed to be completely tightly attached to the floor slab, that is, it cannot be ensured that the concrete floor slab and the steel beams can be stressed at the same time. There is a possibility that the floor slab may be damaged before the steel beams are fully under full load.

[0005] Therefore, the present invention proposes a construction method for floor reinforcement. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide a construction method for reinforcing floor slabs, so as to solve the problems that the existing methods for reinforcing floor slabs are expensive, difficult to construct, and the load of the floor slabs cannot be completely absorbed by the reinforced structure.

[0007] The technical solution to achieve the above purpose is:

[0008] The present invention provides a construction method for floor reinforcement, which specifically comprises the following steps:

[0009] S1: providing a reinforcement steel beam, and placing the reinforcement steel beam below the position where the floor slab is to be fixed;

[0010] S2: providing an electric hoist, placing the electric hoist on the top surface of the floor slab, and making the electric hoist be located directly above the reinforced steel beam;

[0011] S3: Make the lower end of the lifting rope on the electric hoist pass downward through the floor slab and connect with the reinforced steel beam, and then control the lifting rope by the electric hoist to pull the reinforced steel beam upward until the reinforced steel beam abuts against the bottom surface of the floor slab;

[0012] S4: adjusting the camber of the reinforced steel beam and removing the suspension rope from the reinforced steel beam;

[0013] S5: Fixing the reinforced steel beam to the bottom surface of the floor slab.

[0014] Furthermore, when providing the electric hoist, a support frame is also provided. The bottom of the support frame is provided with universal wheels for movement. The support frame is moved to the top surface of the floor, and then the electric hoist is installed on the support frame, and the position of the electric hoist is adjusted by moving the support frame.

[0015] Furthermore, there are at least two of the electric hoists and the supporting frames.

[0016] Furthermore, before the suspension rope is connected to the reinforced steel beam, a temporary hole is opened at the position where the suspension rope passes through the floor slab, so that the suspension rope can pass downward through the temporary hole and connect to the reinforced steel beam.

[0017] Furthermore, before the lifting rope is connected to the reinforced steel beam, a hook is installed at the lower end of the lifting rope, and a lifting lug connected to the hook is installed on the reinforced steel beam, and the connection between the lifting rope and the reinforced steel beam is achieved through the cooperation between the hook and the lifting lug;

[0018] After the reinforcement steel beam is in contact with the floor slab, the lifting lug is located in the corresponding temporary opening;

[0019] After the hook is removed from the lifting ear and the reinforcement steel beam is fixed, the temporary opening is blocked so that the lifting ear is buried in the temporary opening.

[0020] Furthermore, the specific steps of adjusting the camber of the reinforced steel beam are as follows:

[0021] Providing a plurality of temporary supports, arranging the plurality of temporary supports below the reinforced steel beam, and distributing the plurality of temporary supports at intervals along the length direction of the reinforced steel beam;

[0022] Providing a plurality of jacks, and installing the jacks respectively on the upper ends of the corresponding temporary supports;

[0023] The hook is removed from the lifting ear, and then the height of the jack is adjusted, and the height of the jack after adjustment is gradually lowered from the middle of the reinforced steel beam to both ends, so that the height of the middle of the reinforced steel beam is higher than the height of both ends, so that the reinforced steel beam is completely in contact with the floor slab;

[0024] The reinforcing steel beam is then fixed to the bottom surface of the floor slab, and the jacks and temporary supports are removed.

[0025] Furthermore, the reinforcement steel beam is installed between two adjacent structural beams at the bottom of the floor slab, and both ends of the reinforcement steel beam are connected to the corresponding structural beams.

[0026] Furthermore, before the reinforcement steel beam is hoisted, anchor plates are installed on the sides of the corresponding two structural beams;

[0027] After the reinforcement steel beam is hoisted to the bottom surface of the floor slab, the two ends of the reinforcement steel beam correspond to the corresponding anchor plates;

[0028] After adjusting the camber of the reinforced steel beam, the two ends of the reinforced steel beam are welded to the corresponding anchor plates to fix the reinforced steel beam.

[0029] Furthermore, after the reinforcement steel beam and the anchor plate are welded and fixed, a plurality of tension bolts are provided, the tension bolts are passed through the floor slab and fixed to the reinforcement steel beam, and the plurality of tension bolts are distributed at intervals.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] By setting a reinforcing steel beam at the bottom of the floor slab and laying out an electric hoist on the top surface of the floor slab, the electric hoist lifts the reinforcing steel beam to the bottom surface of the floor slab, and fixes the floor slab and the reinforcing steel beam together, the floor slab is reinforced.

[0032] By setting up temporary supports and jacks, the camber of the reinforced steel beam is adjusted so that the reinforced steel beam and the floor slab fit better. When the floor slab is subjected to the ultimate bearing capacity, the camber of the reinforced steel beam can overcome the deflection height of the floor slab.

[0033] By setting tension bolts, the floor slab and the reinforced steel beam are fixed to ensure that the reinforced steel beam and the floor slab can be fully and synchronously stressed, and the reinforced steel beam can truly play a supporting role on the floor slab. At the same time, anchor plates are set on the structural beams so that the anchor plates can evenly distribute the internal force of the reinforced steel beams to the structural beams to prevent the structural beams from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a bottom view of the construction method for floor reinforcement of the present invention after the construction is completed.

[0035] Figure 2 It is a side view of the reinforcement steel beam before hoisting of the construction method for floor reinforcement of the present invention.

[0036] Figure 3 It is a front view of the reinforcement steel beam before hoisting of the construction method for floor reinforcement of the present invention.

[0037] Figure 4 The invention is a side view of the construction method for reinforcing a floor slab after the reinforcement steel beam is hoisted.

[0038] Figure 5 It is a front view of the reinforcement steel beam after hoisting in the construction method for floor reinforcement of the present invention.

[0039] Figure 6 The side view is of the temporary support installed in the construction method for floor reinforcement of the present invention.

[0040] Figure 7 It is a front view of the temporary support after installation of the construction method for floor reinforcement of the present invention.

[0041] Figure 8 It is a front view of the construction method for floor reinforcement of the present invention when the camber of the reinforced steel beam is adjusted.

[0042] Fig. 9 It is a front view of the reinforcement steel beam after being fixed in the construction method for floor reinforcement of the present invention.

[0043] Legend: 1. Floor slab; 2. Reinforced steel beam; 3. Structural beam; 4. Support frame; 5. Lifting rope; 6. Electric hoist; 7. Temporary opening; 8. Anchor plate; 9. Temporary support; 10. Jack; 11. Tension bolt. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] See also Figure 1 The present invention provides a construction method for reinforcing a floor slab, which solves the problems of the existing method for reinforcing a floor slab being expensive, difficult to construct, and the load of the floor slab not being completely absorbed by the reinforced structure. By arranging a reinforcing steel beam at the bottom of the floor slab and arranging an electric hoist on the top surface of the floor slab, the electric hoist lifts the reinforcing steel beam to the bottom surface of the floor slab, and fixes the floor slab and the reinforcing steel beam together, the floor slab is reinforced.

[0046] By setting up temporary supports and jacks, the camber of the reinforced steel beam is adjusted so that the reinforced steel beam and the floor slab fit better. When the floor slab is subjected to the ultimate bearing capacity, the camber of the reinforced steel beam can overcome the deflection height of the floor slab.

[0047] By setting tension bolts, the floor slab and the reinforced steel beam are fixed to ensure that the reinforced steel beam and the floor slab can be fully and synchronously stressed, and the reinforced steel beam can truly play a supporting role on the floor slab. At the same time, anchor plates are set on the structural beams so that the anchor plates can evenly distribute the internal force of the reinforced steel beams to the structural beams to prevent the structural beams from being damaged.

[0048] A construction method for floor reinforcement according to the present invention will be described below in conjunction with the accompanying drawings.

[0049] See also Figure 1 , showing a bottom view of the construction method for floor reinforcement of the present invention after completion of the construction. Figure 2 , showing the side view of the reinforcement steel beam before hoisting of the construction method for floor reinforcement of the present invention. Figure 1 and Figure 2 , a construction method for floor reinforcement of the present invention is described.

[0050] like Figure 1 and Figure 2 As shown, a construction method for floor reinforcement of the present invention specifically includes the following steps:

[0051] S1: providing a reinforcement steel beam 2, and placing the reinforcement steel beam 2 below the position where the floor slab 1 is to be fixed;

[0052] S2: providing an electric hoist 6, placing the electric hoist 6 on the top surface of the floor 1, and making the electric hoist 6 be located directly above the reinforced steel beam 2;

[0053] S3: Make the lower end of the lifting rope 5 on the electric hoist 6 pass downward through the floor slab 1 and connect with the reinforced steel beam 2, and then control the lifting rope 5 by the electric hoist 6 to pull the reinforced steel beam 2 upward until the reinforced steel beam 2 abuts against the bottom surface of the floor slab 1;

[0054] S4: adjusting the camber of the reinforced steel beam 2 and removing the suspension rope 5 from the reinforced steel beam 2;

[0055] S5: Fixing the reinforcement steel beam 2 on the bottom surface of the floor slab 1 .

[0056] In a specific embodiment, when the electric hoist 6 is provided, a support frame 4 is also provided. The bottom of the support frame 4 is provided with universal wheels for movement. The support frame 4 is moved to the top surface of the floor 1, and then the electric hoist 6 is installed on the support frame 4, and the position of the electric hoist 6 is adjusted by moving the support frame 4.

[0057] like Figure 3As shown, in a specific embodiment, there are at least two electric hoists 6 and at least two support frames 4.

[0058] like Figure 3 As shown, in a specific embodiment, before the suspension rope 5 is connected to the reinforced steel beam 2, a temporary hole 7 is opened at the position where the suspension rope 5 passes through the floor 1, so that the suspension rope 5 can pass downward through the temporary hole 7 and connect to the reinforced steel beam 2.

[0059] like Figures 3 to 5 As shown, in a specific embodiment, before the suspension rope 5 is connected to the reinforced steel beam 2, a hook is installed at the lower end of the suspension rope 5, and a lifting lug connected to the hook is installed on the reinforced steel beam 2, and the connection between the suspension rope 5 and the reinforced steel beam 2 is achieved through the cooperation between the hook and the lifting lug;

[0060] After the reinforcement steel beam 2 is in contact with the floor slab 1, the lifting lug is located in the corresponding temporary opening 7;

[0061] After the hook is removed from the lifting ear and the reinforcement steel beam 2 is fixed, the temporary opening 7 is blocked so that the lifting ear is buried in the temporary opening 7 .

[0062] When the temporary opening 7 is blocked, the filling material is concrete.

[0063] like Figures 6 to 8 As shown, in a specific implementation, the specific steps of adjusting the camber of the reinforced steel beam 2 are:

[0064] Providing a plurality of temporary supports 9, arranging the plurality of temporary supports 9 below the reinforced steel beam 2, and distributing the plurality of temporary supports 9 at intervals along the length direction of the reinforced steel beam 2;

[0065] Providing a plurality of jacks 10, and installing the jacks 10 on the upper ends of the corresponding temporary supports 9 respectively;

[0066] Remove the hook from the lifting ear, then adjust the height of the jack 10, and gradually lower the adjusted height of the jack 10 from the middle of the reinforced steel beam 2 to both ends, so that the height of the middle of the reinforced steel beam 2 is higher than the height of both ends, so that the reinforced steel beam 2 is completely in contact with the floor slab 1;

[0067] Then the reinforcement steel beam 2 is fixed to the bottom surface of the floor slab 1, and the jack 10 and temporary support 9 are removed.

[0068] Before the reinforcement steel beam 2 is fixed, the camber of the reinforcement steel beam 2 is adjusted to ensure that the reinforcement steel beam 2 is completely and tightly fitted to the floor slab 1. The camber of the reinforcement steel beam 2 is calculated to be not less than the deflection height of the reinforcement steel beam 2 under the ultimate bearing capacity of the floor slab 1.

[0069] The number of the temporary supports 9 is obtained through stress calculation and is not less than three, which are respectively supported at the two ends and the middle of the reinforced steel beam 2 .

[0070] In a specific implementation, the reinforcement steel beam 2 is installed between two adjacent structural beams 3 at the bottom of the floor slab 1 , and both ends of the reinforcement steel beam 2 are connected to the corresponding structural beams 3 .

[0071] In a specific embodiment, before the reinforcement steel beam 2 is hoisted, anchor plates 8 are installed on the sides of the corresponding two structural beams 3;

[0072] After the reinforcement steel beam 2 is hoisted to the bottom surface of the floor slab 1, the two ends of the reinforcement steel beam 2 correspond to the corresponding anchor plates 8;

[0073] After adjusting the camber of the reinforced steel beam 2 , the two ends of the reinforced steel beam 2 are welded to the corresponding anchor plates 8 to fix the reinforced steel beam 2 .

[0074] By providing the anchoring plate 8 , the two ends of the reinforced steel beam 2 can be fixed to the corresponding structural beam 3 , and the stress of the reinforced steel beam 2 can be evenly dispersed to the structural beam 3 through the anchoring plate 8 .

[0075] In a preferred embodiment, the anchoring plate 8 is fixed to the corresponding structural beam 3 by chemical anchor bolts.

[0076] In another preferred embodiment, the anchoring plate 8 is fixed to the corresponding structural beam 3 by means of mechanical anchor bolts. The tensile bearing capacity and shear bearing capacity of the mechanical anchor bolts meet the requirements of safe force calculation.

[0077] like Figures 8 to 9 As shown, in a specific embodiment, after the reinforcement steel beam 2 and the anchor plate 8 are welded and fixed, a plurality of tension bolts 11 are provided, the tension bolts 11 are passed through the floor 1 and fixed to the reinforcement steel beam 2, and the plurality of tension bolts 11 are distributed at intervals. The tension bolts 11 tightly connect the reinforcement steel beam 2 and the floor 1, ensuring that the reinforcement steel beam 2 and the floor 1 can be fully synchronously stressed, and the bearing capacity of the reinforcement steel beam 2 on the floor 1 can be truly exerted.

[0078] The number of the tension bolts 11 is obtained through stress calculation, and the tensile strength of the tension bolts 11 meets the requirements of safe force calculation.

[0079] In a preferred embodiment, the reinforced steel beam 2 is an I-beam, and bolt holes are opened on the upper flange of the I-beam by an impact drill, and corresponding bolt holes are opened on the floor slab 1, so that the tension bolts 11 can pass through the bolt holes to fix the reinforced steel beam 2 and the floor slab 1.

[0080] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be the scope defined by the attached claims.

Claims

1. A construction method for floor reinforcement, characterized in that: The specific steps include: S1: providing a reinforcement steel beam (2), and placing the reinforcement steel beam (2) below the position where the floor slab (1) is to be fixed; S2: providing an electric hoist (6), placing the electric hoist (6) on the top surface of the floor slab (1), and making the electric hoist (6) be located directly above the reinforced steel beam (2); S3: The lower end of the lifting rope (5) on the electric hoist (6) is passed downward through the floor slab (1) and connected to the reinforced steel beam (2), and then the lifting rope (5) is controlled by the electric hoist (6) to pull the reinforced steel beam (2) to move upward until the reinforced steel beam (2) abuts against the bottom surface of the floor slab (1); S4: adjusting the camber of the reinforced steel beam (2), and removing the suspension rope (5) from the reinforced steel beam (2); S5: Fixing the reinforced steel beam (2) to the bottom surface of the floor slab (1).

2. A construction method for floor reinforcement according to claim 1, characterized in that: When the electric hoist (6) is provided, a support frame (4) is provided at the same time. The bottom of the support frame (4) is provided with universal wheels for movement. The support frame (4) is moved to the top surface of the floor slab (1), and then the electric hoist (6) is installed on the support frame (4). The position of the electric hoist (6) is adjusted by moving the support frame (4).

3. A construction method for floor reinforcement according to claim 2, characterized in that: There are at least two of the electric hoists (6) and the support frames (4).

4. A construction method for floor reinforcement according to claim 1, characterized in that: Before the suspension rope (5) is connected to the reinforced steel beam (2), a temporary opening (7) is opened at the position where the suspension rope (5) passes through the floor slab (1), so that the suspension rope (5) passes downward through the temporary opening (7) and is connected to the reinforced steel beam (2).

5. A construction method for floor reinforcement according to claim 4, characterized in that: Before the lifting rope (5) is connected to the reinforced steel beam (2), a hook is installed at the lower end of the lifting rope (5), and a lifting lug connected to the hook is installed on the reinforced steel beam (2), and the connection between the lifting rope (5) and the reinforced steel beam (2) is achieved through the cooperation between the hook and the lifting lug; After the reinforced steel beam (2) and the floor slab (1) are in contact with each other, the lifting lugs are located in the corresponding temporary openings (7); After the hook is removed from the lifting ear and the reinforcement steel beam (2) is fixed, the temporary opening (7) is blocked so that the lifting ear is buried in the temporary opening (7).

6. A construction method for floor reinforcement according to claim 5, characterized in that: The specific steps of adjusting the camber of the reinforced steel beam (2) are as follows: Providing a plurality of temporary supports (9), arranging the plurality of temporary supports (9) below the reinforced steel beam (2), and distributing the plurality of temporary supports (9) at intervals along the length direction of the reinforced steel beam (2); Providing a plurality of jacks (10), and installing the jacks (10) on the upper ends of the corresponding temporary supports (9); The hook is removed from the lifting ear, and then the height of the jack (10) is adjusted, and the height of the jack (10) after adjustment is gradually lowered from the middle of the reinforced steel beam (2) to both ends, so that the height of the middle of the reinforced steel beam (2) is higher than the height of both ends, so that the reinforced steel beam (2) is completely in contact with the floor slab (1); Then, fix the reinforced steel beam (2) on the bottom surface of the floor slab (1), and remove the jack (10) and the temporary support (9).

7. A construction method for floor reinforcement according to claim 1, characterized in that: The reinforced steel beam (2) is installed between two adjacent structural beams (3) at the bottom of the floor slab (1), and both ends of the reinforced steel beam (2) are connected to the corresponding structural beams (3).

8. A construction method for floor slab reinforcement according to claim 7, characterized in that: Before hoisting the reinforced steel beam (2), install the anchor plates (8) on the sides of the corresponding two structural beams (3). After hoisting the reinforced steel beam (2) to the bottom surface of the floor slab (1), both ends of the reinforced steel beam (2) correspond to the corresponding anchor plates (8). After adjusting the camber of the reinforced steel beam (2), weld both ends of the reinforced steel beam (2) to the corresponding anchor plates (8) to fix the reinforced steel beam (2).

9. A construction method for floor reinforcement according to claim 8, characterized in that: After welding and fixing the reinforced steel beam (2) and the anchor plates (8), provide a plurality of tension bolts (11), pass the tension bolts (11) through the floor slab (1) and fix them to the reinforced steel beam (2), and the plurality of tension bolts (11) are spaced apart.

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