Steel plate reinforcement and construction method for indoor newly-added exhaust passage floor punching

Abstract

The invention relates to a steel plate reinforcement and construction method for indoor newly-added exhaust passage floor holing, which is mainly used for holing at proper positions of floors of an existing house without a vertical exhaust passage and reinforcing holing parts and comprises transverse steel plates, vertical steel plates, wall anchor bolts, short angle steel and floor anchor bolts. The vertical steel plate is adhered to the inner layer of the bottom surface of the floor around the hole; the transverse steel plate is adhered to the outermost layer of the vertical steel plate on the bottom surface of the floor slab; before the vertical steel plate is pasted, the floor needs to be slotted at the bottom face pasting position of the floor. The vertical steel plates, the transverse steel plates and the short angle steel are fixed in a welding mode. The short angle steel is fixedly connected with the wall body through a wall body anchor bolt; the vertical steel plates and the transverse steel plates are connected with the floor slab in an adhering mode and are fixed through floor slab anchor bolts.

Description

Technical Field

[0001] The present invention relates to a method for reinforcing a newly added indoor exhaust duct floor slab with a steel plate and a construction method thereof, belonging to the technical field of comprehensive renovation of old residential areas. Background Art

[0002] The installation of new indoor exhaust ducts is mainly aimed at existing houses that do not have vertical exhaust ducts installed. Holes are opened at appropriate locations in the floor slabs, and the opening locations are reinforced. New indoor exhaust ducts in existing buildings should be opened in the floor slabs according to the cross-sectional dimensions of the pre-installed exhaust ducts. The reinforcement of the openings in the floor slabs should adopt different reinforcement methods according to the nature of the floor slabs (beam-type floor, beamless floor, simply supported slab, continuous slab, one-way slab, two-way slab, prestressed slab, non-prestressed slab), the location of the openings (edge, middle), the size and shape of the openings, etc. After the openings in the floor slabs, the original force transmission path and reinforcement are partially cut off. The internal force analysis and bearing capacity verification are carried out on the structure after the openings, and the hole reinforcement design is carried out based on the calculation results. After the openings in the floor slabs, on the one hand, the internal force of the plates around the openings is increased, causing stress concentration. On the other hand, the plate reinforcement is reduced and the bearing capacity is reduced. Therefore, the internal force analysis and bearing capacity verification should be carried out on the structure after the openings. The present invention mainly adopts the method of reinforcing the openings in the floor slabs against the walls on both sides of the newly added exhaust ducts with steel plates. Summary of the Invention

[0003] The present invention proposes a method for reinforcing a newly added indoor exhaust duct floor slab with a steel plate and a construction method thereof, which is mainly aimed at opening a hole in an appropriate position of the floor slab of an existing house without a vertical exhaust duct installed, and reinforcing the hole portion by gluing a steel plate and reinforcing it with anchor bolts.

[0004] The present invention adopts the following technical solutions:

[0005] A new indoor exhaust duct floor opening is reinforced with steel plates and its construction method, such as Figures 1-2 As shown, it includes horizontal steel plates, vertical steel plates, wall anchors, short angle steels, and floor anchors; the vertical steel plates are subjected to less stress and are pasted to the inner layer of the bottom surface of the floor around the opening; the horizontal steel plates are subjected to greater stress and are pasted to the outermost layer of the vertical steel plates on the bottom surface of the floor; before pasting the vertical steel plates, the floor needs to be grooved at the bottom surface of the floor, and the groove depth is the thickness of the vertical steel plate + 3mm; the vertical steel plates, horizontal steel plates and short angle steels are fixed by welding; the short angle steels are fixed to the wall by wall anchors; in addition to pasting, the vertical steel plates, horizontal steel plates and floor are also fixed by floor anchors; the overlap between the vertical steel plates and horizontal steel plates is welded.

[0006] Furthermore, the short angle steel is composed of L50×5 equilateral angle steel.

[0007] Furthermore, the vertical steel plates and the horizontal steel plates are both Q235B steel plates with a thickness of 5 mm and a width of 150 mm.

[0008] Furthermore, the wall anchor bolts and floor anchor bolts are both M10 bolts, with a diameter of 14 mm drilled in the wall or floor, and epoxy resin glue is implanted.

[0009] Furthermore, the vertical steel plates, horizontal steel plates and floor slabs are bonded together using cement polymer grouting liquid.

[0010] The above-mentioned method of reinforcing the opening of the new indoor exhaust duct floor with steel plates and its construction method is specifically implemented as follows:

[0011] Step 1: Prepare horizontal steel plates, vertical steel plates, wall anchors, short angle steels, and floor anchors according to the design drawings, and weld short angle steels to one end of the horizontal and vertical steel plates in advance.

[0012] Step 2: Slot, blow off dust, moisten the floor slab at the bottom veneer of the floor slab, and paste the vertical steel plate.

[0013] Step 3: Drill holes and apply powder at the locations of the walls and floor slabs according to the design drawings, and implant wall anchor bolts and floor slab anchor bolts.

[0014] Step 4: Paste the horizontal steel plate on the bottom surface of the floor slab.

[0015] Step 5: Use floor anchor bolts to fix the horizontal and vertical steel plates to the floor; use wall anchor bolts to fix the short angle steels welded at the ends of the horizontal and vertical steel plates to the wall.

[0016] Step 6: Weld the overlap between the horizontal steel plate and the vertical steel plate.

[0017] Step 7: Perform rust-proof treatment on exposed horizontal steel plates, vertical steel plates, wall anchor bolts, short angle steels, floor anchor bolts, etc.

[0018] Beneficial effects:

[0019] The use of steel plates to reinforce the newly added exhaust duct floor openings in the interior can bear the tensile stress caused by the floor openings and improve the strength and toughness around the floor openings. This method is simple to construct, safe and reliable, and also reduces the project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Bottom view of the floor slab being reinforced with steel plates for the new indoor exhaust duct;

[0021] Figure 2 for Figure 1 AA cross-section diagram.

[0022] In the figure, 1: horizontal steel plate; 2: vertical steel plate; 3: wall anchor bolt; 4: short angle steel; 5: floor anchor bolt; 6: wall; 7: floor. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is as follows:

[0024] A new indoor exhaust duct floor opening is reinforced with steel plates and its construction method, such as Figures 1-2 As shown, it is characterized in that: it includes a horizontal steel plate 1, a vertical steel plate 2, a wall anchor 3, a short angle steel 4, and a floor anchor 5; the vertical steel plate 2 is subjected to less force and is pasted on the inner layer of the bottom surface of the floor slab 7 around the opening; the horizontal steel plate 1 is subjected to greater force and is pasted on the outermost layer of the vertical steel plate 2 on the bottom surface of the floor slab 7; before the vertical steel plate 2 is pasted, the floor slab 7 needs to be grooved at the veneer of the bottom surface of the floor slab 7, and the groove depth is the thickness of the vertical steel plate 2 + 3mm; the vertical steel plate 2, the horizontal steel plate 1 and the short angle steel 4 are fixed by welding; the short angle steel 4 and the wall 6 are fixedly connected by the wall anchor 3; in addition to pasting, the vertical steel plate 2, the horizontal steel plate 1 and the floor slab 7 are also fixed by floor anchor 5; the overlap between the vertical steel plate 2 and the horizontal steel plate 1 is welded.

[0025] Furthermore, the short angle steel 4 is composed of L50×5 equal-leg angle steel.

[0026] Furthermore, the vertical steel plate 2 and the horizontal steel plate 1 are both Q235B steel plates with a thickness of 5 mm and a width of 150 mm.

[0027] Furthermore, the wall anchor bolts 3 and floor anchor bolts 5 are both M10 bolts, and holes with a diameter of 14 mm are drilled on the wall 6 or floor slab 7 and epoxy resin glue is implanted.

[0028] Furthermore, the vertical steel plate 2, the horizontal steel plate 1 and the floor slab 7 are pasted together using cement polymer grouting liquid.

[0029] The above-mentioned method of reinforcing the opening of the new indoor exhaust duct floor with steel plates and its construction method is specifically implemented as follows:

[0030] Step 1: Prepare the horizontal steel plate 1, vertical steel plate 2, wall anchor bolts 3, short angle steel 4, and floor anchor bolts 5 according to the design drawings, and weld the short angle steel 4 to one end of the horizontal steel plate 1 and vertical steel plate 2 in advance.

[0031] Step 2: Grooving, soot blowing, and moistening the floor slab 7 at the bottom veneer of the floor slab 7, and pasting the vertical steel plate 2.

[0032] Step 3: Drill holes and apply powder at the positions of the wall 6 and floor slab 7 according to the design drawings, and implant the wall anchor bolts 3 and floor slab anchor bolts 5.

[0033] Step 4: Paste the horizontal steel plate 1 on the bottom surface of the floor slab 7.

[0034] Step 5: Use floor anchor bolts 5 to fix the horizontal steel plate 1 and the vertical steel plate 2 on the floor slab 7; use wall anchor bolts 3 to fix the short angle steel 4 welded at the ends of the horizontal steel plate 1 and the vertical steel plate 2 on the wall 6.

[0035] Step 6: Weld the overlap between the horizontal steel plate 1 and the vertical steel plate 2.

[0036] Step 7: Perform rust-proof treatment on the exposed horizontal steel plates 1, vertical steel plates 2, wall anchor bolts 3, short angle steels 4, floor anchor bolts 5, etc.

[0037] The above is a typical embodiment of the present invention, and the specific implementation of the present invention is not limited thereto.

Claims

1. A method for reinforcing a newly added indoor exhaust duct floor slab with steel plates and a construction method thereof, as shown in Figures 1 and 2, is characterized by: The invention comprises a horizontal steel plate (1), a vertical steel plate (2), a wall anchor bolt (3), a short angle steel (4), and a floor anchor bolt (5); the vertical steel plate (2) is subjected to a relatively small force and is pasted on the inner layer of the bottom surface of the floor plate (7) around the opening; the horizontal steel plate (1) is subjected to a relatively large force and is pasted on the outermost layer of the vertical steel plate (2) on the bottom surface of the floor plate (7); before the vertical steel plate (2) is pasted, the floor plate (7) needs to be grooved at the veneer of the bottom surface of the floor plate (7), and the groove depth is the vertical steel plate (2). The thickness of the plate (2) is +3mm thick; the vertical steel plate (2), the horizontal steel plate (1) and the short angle steel (4) are fixed by welding; the short angle steel (4) and the wall (6) are fixedly connected by wall anchor bolts (3); the vertical steel plate (2), the horizontal steel plate (1) and the floor slab (7) are fixed by floor slab anchor bolts (5) in addition to being glued; the overlap between the vertical steel plate (2) and the horizontal steel plate (1) is welded.

2. The method for reinforcing a newly added indoor exhaust duct floor opening with steel plates and its construction method according to claim 1, characterized in that: The short angle steel (4) is composed of L50×5 equal-leg angle steel.

3. The method for reinforcing a newly added indoor exhaust duct floor opening with steel plates and its construction method according to claim 1, characterized in that: The vertical steel plate (2) and the horizontal steel plate (1) are both Q235B steel plates with a thickness of 5 mm and a width of 150 mm.

4. The method for reinforcing a newly added indoor exhaust duct floor opening with steel plates and its construction method according to claim 1, characterized in that: The wall anchor bolts (3) and floor anchor bolts (5) are both M10 bolts, and holes with a diameter of 14 mm are drilled on the wall (6) or floor (7) and epoxy resin glue is implanted.

5. The method for reinforcing a newly added indoor exhaust duct floor opening with steel plates and its construction method according to claim 1, characterized in that: The vertical steel plate (2), the horizontal steel plate (1) and the floor slab (7) are bonded together using cement polymer grouting liquid.

6. The method for reinforcing a newly added indoor exhaust duct floor opening with steel plates and its construction method according to any one of claims 1 to 5, characterized in that: Use the following steps: Step 1: Prepare the horizontal steel plate (1), vertical steel plate (2), wall anchor bolts (3), short angle steel (4), and floor anchor bolts (5) according to the design drawings, and weld the short angle steel (4) to one end of the horizontal steel plate (1) and the vertical steel plate (2) in advance. Step 2: groove the floor slab (7), blow off the soot, moisten the floor slab (7) at the bottom veneer of the floor slab (7), and paste the vertical steel plate (2). Step 3: Drill holes and blow powder at the positions of the wall (6) and floor (7) according to the design drawings, and implant the wall anchor bolts (3) and floor anchor bolts (5). Step 4: Paste the transverse steel plate (1) on the bottom surface of the floor slab (7). Step 5: Use floor anchor bolts (5) to fix the transverse steel plate (1) and the vertical steel plate (2) on the floor plate (7); use wall anchor bolts (3) to fix the short angle steel (4) welded at the ends of the transverse steel plate (1) and the vertical steel plate (2) on the wall (6). Step 6: Weld the overlapping parts of the horizontal steel plate (1) and the vertical steel plate (2). Step 7: Perform anti-rust treatment on the exposed horizontal steel plates (1), vertical steel plates (2), wall anchor bolts (3), short angle steels (4), floor anchor bolts (5), etc.

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