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] This invention relates to a method for reinforcing newly added indoor exhaust duct floor slab openings with steel plates and its construction, belonging to the technical field of comprehensive renovation of old residential communities. Background Technology

[0002] The addition of indoor exhaust ducts is primarily for existing buildings without vertical exhaust ducts. It involves creating openings in the floor slab at appropriate locations and reinforcing these openings. The openings in existing buildings should be based on the cross-sectional dimensions of the pre-installed exhaust ducts. Reinforcement of these openings should be tailored to the specific type of floor slab (beamed floor, flat slab, simply supported slab, continuous slab, one-way slab, two-way slab, prestressed slab, non-prestressed slab), the location of the opening (edge, center), and its size and shape. Creating an opening partially severs the original force transmission path and reinforcement. Therefore, internal force analysis and load-bearing capacity calculations are performed on the structure after the opening. Based on the calculation results, reinforcement design for the opening is implemented. Creating an opening increases the internal forces in the surrounding slab, causing stress concentration, and reduces the slab reinforcement, thus lowering the load-bearing capacity. Therefore, internal force analysis and load-bearing capacity calculations are necessary for the structure after the opening. This invention primarily addresses the use of steel plates to reinforce openings in floor slabs against walls on both sides of the newly added exhaust duct. Summary of the Invention

[0003] This invention proposes a method for reinforcing newly added indoor exhaust duct floor openings with steel plates and its construction. It is mainly for existing buildings without vertical exhaust ducts, where openings are made at appropriate locations in the floor slab, and the openings are reinforced by pasting steel plates and using anchor bolts.

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

[0005] A method for reinforcing newly added indoor exhaust duct floor openings with steel plates and its construction, such as... Figures 1-2 As shown, the structure includes horizontal steel plates, vertical steel plates, wall anchors, short angle steel, and floor anchors. The vertical steel plates, which bear less stress, are adhered to the inner layer of the floor slab around the opening. The horizontal steel plates, which bear greater stress, are adhered to the outermost layer of the vertical steel plates on the floor slab. Before adhering the vertical steel plates, grooves need to be cut into the floor slab at the surface where they will be adhered, with a groove depth equal to the thickness of the vertical steel plate plus 3mm. The vertical and horizontal steel plates are fixed to the short angle steel by welding. The short angle steel is fixed to the wall using wall anchors. In addition to adhesion, the vertical and horizontal steel plates are also fixed to the floor slab using floor anchors. The overlap between the vertical and horizontal steel plates is welded.

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

[0007] Furthermore, the vertical and horizontal steel plates are both 5mm thick and 150mm wide Q235B steel plates.

[0008] Furthermore, both the wall anchors and floor anchors are M10 bolts, with a 14mm diameter hole drilled in the wall or floor slab to insert epoxy resin adhesive.

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

[0010] The specific implementation steps for the above-mentioned method of reinforcing indoor exhaust duct floor openings with steel plates and its construction are as follows:

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

[0012] Step 2: Groove, blow away ash, moisten, and then attach the vertical steel plate to the bottom surface of the floor slab.

[0013] Step 3: Drill holes and apply powder to the walls and floors according to the design drawings, and then insert wall anchors and floor anchors.

[0014] Step 4: Attach a horizontal steel plate to the bottom surface of the floor slab.

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

[0016] Step 6: Weld the joints of the horizontal and vertical steel plates.

[0017] Step 7: Apply rust prevention treatment to exposed horizontal steel plates, vertical steel plates, wall anchors, short angle steel, floor anchors, etc.

[0018] Beneficial effects:

[0019] Reinforcing the floor slab openings for new indoor ventilation ducts with steel plates can withstand the tensile stress generated by the openings, improve the strength and toughness around the openings, and is a simple, safe, and reliable method that also reduces project costs. Attached Figure Description

[0020] Figure 1 A bottom view showing the reinforcement of the floor slab with steel plates for the newly added indoor ventilation duct opening.

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

[0022] In the diagram, 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 Implementation

[0023] The specific embodiments of the present invention are as follows:

[0024] A method for reinforcing newly added indoor exhaust duct floor openings with steel plates and its construction, such as... Figures 1-2 As shown, the feature is that it includes a horizontal steel plate 1, a vertical steel plate 2, wall anchors 3, short angle steel 4, and floor anchors 5. The vertical steel plate 2 is subjected to less force and is pasted to 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 to the outermost layer of the vertical steel plate 2 on the bottom surface of the floor slab 7. Before pasting the vertical steel plate 2, a groove needs to be cut into the bottom surface of the floor slab 7 at the pasting point, 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 is fixedly connected to the wall 6 by the wall anchors 3. In addition to pasting, the vertical steel plate 2, the horizontal steel plate 1, and the floor slab 7 are also fixed by the floor anchors 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 equilateral angle steel.

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

[0027] Furthermore, both the wall anchor bolt 3 and the floor anchor bolt 5 are M10 bolts, with a 14mm diameter hole drilled in the wall 6 or floor 7, into which epoxy resin is inserted.

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

[0029] The specific implementation steps for the above-mentioned method of reinforcing indoor exhaust duct floor openings with steel plates and its construction are as follows:

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

[0031] Step 2: Groove, blow away ash, and moisten the bottom surface of floor slab 7, and then attach the vertical steel plate 2.

[0032] Step 3: Drill holes and apply powder to the wall 6 and floor slab 7 according to the design drawings, and insert wall anchors 3 and floor slab anchors 5.

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

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

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

[0036] Step 7: Apply rust prevention treatment to the exposed horizontal steel plates 1, vertical steel plates 2, wall anchors 3, short angle steel 4, floor slab anchors 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 indoor ventilation duct floor openings with steel plates and its construction, as shown in Figures 1-2, characterized in that: It includes a horizontal steel plate (1), a vertical steel plate (2), wall anchors (3), short angle steel (4), and floor slab anchors (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 pasting the vertical steel plate (2), the floor slab (7) needs to be grooved at the surface of the floor slab (7), and the groove depth is the vertical steel plate (2) of the wall. The thickness of plate (2) is +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 wall anchor bolts (3); the vertical steel plate (2), the horizontal steel plate (1) and the floor slab (7) are fixed by floor anchor bolts (5) in addition to pasting; the overlap between the vertical steel plate (2) and the horizontal steel plate (1) is welded.

2. The method for reinforcing indoor ventilation duct floor slab openings with steel plates and its construction method as described in claim 1, characterized in that: The short angle steel (4) is composed of L50×5 equilateral angle steel.

3. The method for reinforcing indoor ventilation duct floor slab openings with steel plates and its construction method as described in 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 5mm and a width of 150mm.

4. The method for reinforcing indoor ventilation duct floor slab openings with steel plates and its construction method as described in claim 1, characterized in that: The wall anchors (3) and floor anchors (5) are both M10 bolts. The diameter of the hole drilled in the wall (6) or floor (7) is 14mm, and epoxy resin is inserted.

5. The method for reinforcing indoor exhaust duct floor slab openings with steel plates and its construction method as described in 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 grout.

6. The method for reinforcing indoor ventilation duct floor slab openings with steel plates and its construction method according to any one of claims 1-5, characterized in that: The following steps are used: Step 1: Prepare horizontal steel plate (1), vertical steel plate (2), wall anchor bolt (3), short angle steel (4), and floor anchor bolt (5) according to the design drawings, and weld short angle steel (4) to one end of horizontal steel plate (1) and vertical steel plate (2) in advance. Step 2: Groove, blow away ash, and moisten the bottom surface of the floor slab (7) and then attach the vertical steel plate (2). Step 3: Drill holes and apply powder to the wall (6) and floor slab (7) according to the design drawings, and insert wall anchors (3) and floor slab anchors (5). Step 4: Paste the horizontal steel plate (1) on the bottom surface of the floor slab (7). Step 5: Use floor anchors (5) to fix the horizontal steel plate (1) and vertical steel plate (2) to the floor slab (7); use wall anchors (3) to fix the short angle steel (4) welded to the ends of the horizontal steel plate (1) and vertical steel plate (2) to the wall (6). Step 6: Weld the joint between the horizontal steel plate (1) and the vertical steel plate (2). Step 7: Apply rust prevention treatment to the exposed horizontal steel plates (1), vertical steel plates (2), wall anchors (3), short angle steel (4), floor anchors (5), etc.

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