Waterproof connecting structure for newly-added floor slab and original building

Abstract

The utility model provides a waterproof connecting structure of a newly-added floor slab and an original building. The waterproof connecting structure comprises the original building, the newly-added floor slab and a water stop steel plate. One side of the original building is connected with the newly-added floor, and floor structural steel bars at the end, connected with the original building, of the newly-added floor are implanted into a concrete structure of the original building. A groove is formed in the side face, connected with the newly-added floor slab, of the original building. The depth of the groove is smaller than the thickness of a concrete protection layer of the original building, the water stop steel plate is arranged between the upper layer reinforcing steel bar and the lower layer reinforcing steel bar of the floor slab structure reinforcing steel bar, and the water stop steel plate is fixedly connected with the original building through a chemical anchor bolt structure. A gap between the water stop steel plate and the bottom face of the groove is filled with underwater embedded steel bar glue. According to the waterproof connecting structure, the damage of the waterproof connecting structure of the newly-added floor slab and the original building to the original building is reduced, and the application range of the waterproof connecting structure of the newly-added floor slab and the original building is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of building reinforcement and reconstruction engineering, in particular to a waterproof connection structure between a newly added floor slab and an original building. Background Art

[0002] To better utilize the available space in a building structure, a large number of structural modifications are currently being made to existing buildings, including the addition of new floors. The steps for adding a new floor are as follows: First, the original building drawings must be used to confirm whether a new floor can be added. Once this is confirmed, the structural reinforcement for the new floor is implanted into the existing building. Formwork for the new floor is then installed, and finally, concrete is poured to form the new floor.

[0003] The existing waterproofing method for the connection between the newly added roof panels and the newly added basement ceiling and the existing building generally uses flexible waterproofing methods. This method is achieved by filling the connection between the new floor slab and the existing building with flexible waterproof materials or laying a flexible waterproof layer. However, flexible waterproofing materials and flexible waterproof layers are prone to aging during use. At the same time, the connection between the new floor slab and the existing building is prone to cracking under load, which can lead to the failure of the waterproof structure at the connection between the new floor slab and the existing building, causing water seepage, which in turn shortens the service life of the reinforced and renovated building.

[0004] Chinese Utility Model Publication No. CN218234436U discloses a connection structure between a newly added floor slab and an original beam, which includes an original beam, a newly added floor slab and a waterstop steel plate; the outer side of the original beam is connected to the newly added floor slab, and the floor slab structural steel bars at one end of the newly added floor slab connected to the original beam are implanted in the concrete structure of the original beam; a groove is chiseled on the side of the original beam at the connection with the newly added floor slab, the depth of the groove is greater than the thickness of the concrete protective layer of the original beam, and the original beam structural steel bars at the connection with the newly added floor slab are placed in the groove; the waterstop steel plate is provided between the upper and lower steel bars of the floor slab structural steel bars, and the vertical side of the waterstop steel plate is fixedly connected to the original beam structural steel bars located in the groove; the gap between the waterstop steel plate and the bottom surface of the groove is filled with underwater anchor glue. This patent improves the integrity and waterproof quality of the connection between the newly added floor slab and the original beam. However, this patent requires the complete removal of the concrete protective layer at the connection between the original beam and the newly added floor slab to expose the structural steel bars of the original beam, which causes great damage to the original beam. For the original building with a thicker concrete protective layer, the use of this waterproof connection structure requires a huge amount of roughening work, and the damage to the original building will affect the integrity of the reinforced building. Therefore, the scope of use of the waterproof connection structure of this patent is also subject to certain limitations. Utility Model Content

[0005] The purpose of the utility model is to provide a waterproof connection structure between a new floor and an original building to reduce the damage to the original building caused by the waterproof connection structure between the new floor and the original building, and to improve the scope of application of the waterproof connection structure between the new floor and the original building.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A waterproof connection structure between a new floor slab and an existing building, comprising an existing building, a new floor slab, and a waterstop steel plate; the new floor slab is connected to one side of the existing building, and the floor slab structural steel bars at one end where the new floor slab is connected to the existing building are embedded in the concrete structure of the existing building; a groove is formed on the side of the existing building at the connection with the new floor slab;

[0008] Its structural features are that the depth of the groove is less than the thickness of the concrete cover of the original building, the waterstop steel plate is provided between the upper and lower steel bars of the floor structure steel bars, and the waterstop steel plate is fixedly connected to the original building through a chemical anchor structure;

[0009] The gap between the water-stop steel plate and the bottom surface of the groove is filled with underwater anchor glue.

[0010] The above-mentioned waterproof connection structure between a new floor slab and an existing building has a groove on the side of the connection between the existing building and the new floor slab. The depth of the groove is less than the thickness of the concrete protective layer of the existing building. A waterstop steel plate is provided between the upper and lower steel bars of the floor slab structural steel bars. The waterstop steel plate is fixedly connected to the existing building via a chemical anchor structure. The gap between the waterstop steel plate and the bottom surface of the groove is filled with underwater anchor glue. The groove depth of the above-mentioned waterproof connection structure is less than the thickness of the concrete protective layer of the existing building. During the construction of the waterproof connection structure, the amount of roughening work on the existing building is small, and the damage to the existing building is small. At the same time, the above-mentioned waterproof connection structure can be applied to existing buildings with different concrete protective layer thicknesses. Therefore, the scope of application of the waterproof connection structure between the new floor slab and the existing building is improved.

[0011] Furthermore, the waterstop steel plate includes a vertical section and a horizontal section; the top and bottom of the vertical section are fixedly connected to the original building through a chemical anchor structure; the middle part of the inner side surface of the vertical section is fixedly connected to the horizontal section, and the horizontal section is anchored in the concrete structure of the newly added floor slab.

[0012] Furthermore, the top and bottom of the vertical section are fixedly connected to the original building through a plurality of chemical anchor structures.

[0013] Furthermore, the chemical anchor structure includes a mounting hole opened at the connection of the original building, a connecting hole provided on the waterstop steel plate, and a chemical anchor; the anchoring end of the chemical anchor is placed in the mounting hole, and the gap between the inner wall of the mounting hole and the outer surface of the chemical anchor is filled with a chemical adhesive; the connecting end of the chemical anchor passes through the corresponding connecting hole and is connected to a nut.

[0014] Furthermore, a first gasket is provided between the waterstop steel plate and the original building; and a second gasket is provided between the nut and the waterstop steel plate.

[0015] Furthermore, the first gasket is a rubber gasket; the thickness of the first gasket is 4 mm to 8 mm.

[0016] Furthermore, the original building is provided with anchor bolt holes on the side of the connection with the newly added floor slab, and the anchor bolt ends of the upper steel bars and the lower steel bars are respectively inserted into the corresponding anchor bolt holes, and the gaps between the upper steel bars, the lower steel bars and the anchor bolt holes are filled with underwater anchor bolt glue.

[0017] Furthermore, the depth of the groove is 10 mm to 15 mm.

[0018] Furthermore, the original building is the original structural beam; the newly added floor slab is the newly added roof slab or the newly added basement top slab.

[0019] Furthermore, the side surface of the end of the waterstop steel plate connected to the original building is roughened, thereby increasing the bonding area between the vertical side surface of the waterstop steel plate and the underwater anchoring glue, thereby improving the integrity of the waterstop steel plate and the original building.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The utility model reduces the damage to the original building during the construction of the waterproof connection structure between the new floor slab and the original building, and improves the application range of the waterproof connection structure between the new floor slab and the original building.

[0022] 2. The waterstop steel plate of the present invention is fixedly connected to the original building through a chemical anchor structure. The chemical anchor structure can ensure a stable connection between the waterstop steel plate and the original building. At the same time, during use, the chemical anchor can withstand tensile stress for the waterproof connection structure, thereby improving the integrity and waterproof quality of the connection between the new floor slab and the original building. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of an embodiment of the utility model;

[0024] Figure 2 This is the front view of the water-stop steel plate;

[0025] Figure 3 This is a transverse cross-sectional view of the water-stop steel plate.

[0026] In the figure: 1. Original building; 2. Newly added floor slab; 3. Waterstop steel plate; 31. Vertical section; 32. Horizontal section; 4. Floor slab structural reinforcement; 41. Upper reinforcement; 42. Lower reinforcement; 5. Groove; 51. Bottom surface; 6. Mounting hole; 7. Chemical anchor bolt; 8. Nut; 9. First gasket; 10. Second gasket; 11. Rebar hole; 12. Original floor slab. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0028] like Figure 1-Figure 3 As shown, a waterproof connection structure between a newly added floor slab and an existing building in this embodiment includes an existing building 1, a newly added floor slab 2, and a waterstop steel plate 3. The newly added floor slab 2 is connected to one side of the existing building 1, and the floor slab structural reinforcement 4 at one end where the newly added floor slab 2 and the existing building 1 are connected is implanted into the concrete structure of the existing building 1. The existing building 1 is provided with a groove 5 on the side where it is connected to the newly added floor slab 2; the depth of the groove 5 is less than the thickness of the concrete protective layer of the existing building 1, and the waterstop steel plate 3 is provided between the upper steel bars 41 and the lower steel bars 42 of the floor slab structural reinforcement 4, and the waterstop steel plate 3 is fixedly connected to the existing building 1 via a chemical anchor structure.

[0029] The gap between the water-stop steel plate 3 and the bottom surface 51 of the groove 5 is filled with underwater anchoring glue. The underwater anchoring glue is Gutebang JN-M structural injection glue.

[0030] like Figure 1-Figure 3 As shown, the waterstop steel plate 3 includes a vertical section 31 and a horizontal section 32. The top and bottom of the vertical section 31 are fixedly connected to the original building 1 via chemical anchor structures. The horizontal section 32 is fixedly connected to the middle of the inner side of the vertical section 31, and the horizontal section 32 is anchored in the concrete structure of the newly added floor slab 2. The top and bottom of the vertical section 31 are fixedly connected to the original building 1 via multiple chemical anchor structures.

[0031] like Figure 1 and Figure 3As shown, the chemical anchor structure includes a mounting hole 6 opened at the connection of the original building 1, a connecting hole provided on the waterstop steel plate 3, and a chemical anchor 7. The anchoring end of the chemical anchor 7 is placed in the mounting hole 6, and the gap between the inner wall of the mounting hole 6 and the outer surface of the chemical anchor 7 is filled with a chemical adhesive. The connecting end of the chemical anchor 7 passes through the corresponding connecting hole and is connected to a nut 8. A first gasket 9 is provided between the waterstop steel plate 3 and the original building 1; a second gasket 10 is provided between the nut 8 and the waterstop steel plate 3. The first gasket 9 is a rubber gasket; the thickness of the first gasket 9 is 4mm to 8mm. The second gasket 10 is a steel gasket.

[0032] like Figure 1 As shown, the original building 1 is provided with a rebar hole 11 on the side of the connection with the newly added floor slab 2, and the rebar ends of the upper steel bars 41 and the lower steel bars 42 are respectively inserted into the corresponding rebar holes 11, and the gaps between the upper steel bars 41, the lower steel bars 42 and the rebar holes 11 are filled with underwater rebar glue.

[0033] The original building 1 is the original structural beam. The newly added floor slab 2 is a newly added roof slab or a newly added basement top slab.

[0034] The side surface of the end of the water-stop steel plate 3 connected to the original building 1 is roughened, thereby increasing the bonding area between the vertical side surface of the water-stop steel plate and the structural grouting adhesive, and improving the integrity of the water-stop steel plate and the original building.

[0035] The construction process of a waterproof connection structure between a newly added floor slab and an existing building in this embodiment is as follows:

[0036] 1. Before construction, grind the bonding base surface of the waterstop steel plate into a rough surface and open a connecting hole on the waterstop steel plate.

[0037] 2. Create grooves, mounting holes, and rebar holes on the sides of the existing building where the new floor slab meets the existing building. Create the grooves by roughening, with the thickness of the roughening less than the existing building's concrete cover. Start roughening from the outside of the existing building to a depth of 10-15mm.

[0038] 3. Clean the mounting holes and rebar holes. Brush the hole walls with a stiff brush and then blow out the dust with clean, oil-free compressed air. Repeat this process at least three times. If necessary, clean the hole walls with a clean cotton cloth dampened with a small amount of acetone or alcohol.

[0039] 4. Install the chemical anchor. Ensure the chemical anchor glass tube anchor package is free of external damage, solidified chemical, or other abnormalities. Insert the package into the mounting hole with the rounded end facing inward and push it all the way to the bottom. Using an electric hammer or drill and specialized mounting hardware, forcefully rotate the screw until it reaches the bottom of the hole. This will break the glass tube and forcefully mix the anchoring agent. Use power tools to ensure thorough mixing. When the package reaches the bottom of the hole, stop rotating immediately, remove the mounting hardware, and avoid disturbing the package after gelation and before it cures. Excessive rotation will cause gel loss, affecting the anchoring strength.

[0040] 5. Install the waterstop steel plate on the side of the chemical bolt installation end. First, insert the first gasket into each chemical anchor installation end, then align the connection hole of the waterstop steel plate with the installation end of the chemical bolts and insert them. Finally, insert the second gasket and nut into each chemical anchor installation end, and finally tighten the waterstop steel plate with the nut.

[0041] 6. Install the structural reinforcement of the newly added floor slab, and place the embedded ends of the upper and lower reinforcement of the newly added floor slab in the corresponding embedded holes.

[0042] 9. Fill the gap between the waterstop steel plate and the bottom surface of the groove with underwater anchoring glue, and fill the gaps between the upper steel bars, lower steel bars and anchoring holes with underwater anchoring glue.

[0043] 10. Pour the new floor slab concrete structure.

[0044] The waterproof connection structure of this embodiment reduces the damage to the original building during the construction of the waterproof connection structure between the new floor slab and the original building, and improves the applicability of the waterproof connection structure between the new floor slab and the original building.

[0045] At the same time, the waterstop steel plate of this embodiment is fixedly connected to the original building through a chemical anchor structure, and the connection between the waterstop steel plate and the original building is more firmly. The main force of the waterproof connection structure is the chemical anchor and the newly added floor slab embedded reinforcement part. The chemical anchor can withstand tensile stress for the waterproof connection structure, thereby improving the integrity and waterproof quality of the connection between the newly added floor and the original building, enhancing the waterproof effect of the waterproof connection structure and extending the service life of the waterproof connection structure.

[0046] The contents described in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A waterproof connection structure between a newly added floor and an existing building, comprising an existing building (1), a newly added floor (2) and a water-stop steel plate (3); One side of the original building (1) is connected to the newly added floor slab (2), and the floor slab structural steel bars (4) at one end where the newly added floor slab (2) and the original building (1) are connected are embedded in the concrete structure of the original building (1); a groove (5) is provided on the side of the original building (1) at the connection with the newly added floor slab (2); It is characterized by: The depth of the groove (5) is less than the thickness of the concrete protective layer of the original building (1); the waterstop steel plate (3) is provided between the upper steel bars (41) and the lower steel bars (42) of the floor structure steel bars (4); the waterstop steel plate (3) is fixedly connected to the original building (1) via a chemical anchor structure; The gap between the water-stop steel plate (3) and the bottom surface (51) of the groove (5) is filled with underwater rebar-anchoring glue.

2. The waterproof connection structure between a new floor and an existing building according to claim 1, characterized in that: The waterstop steel plate (3) includes a vertical section (31) and a horizontal section (32); the top and bottom of the vertical section (31) are fixedly connected to the original building (1) through a chemical anchor structure; the middle part of the inner side surface of the vertical section (31) is fixedly connected to the horizontal section (32), and the horizontal section (32) is anchored in the concrete structure of the newly added floor slab (2).

3. The waterproof connection structure between a new floor and an existing building according to claim 2, characterized in that: The top and bottom of the vertical section (31) are fixedly connected to the original building (1) via a plurality of chemical anchor structures.

4. The waterproof connection structure between a new floor and an existing building according to claim 1, characterized in that: The chemical anchor bolt structure comprises a mounting hole (6) opened at the connection of the original building (1), a connecting hole provided on the water-stop steel plate (3), and a chemical anchor bolt (7); the anchoring end of the chemical anchor bolt (7) is placed in the mounting hole (6), and the gap between the inner wall of the mounting hole (6) and the outer surface of the chemical anchor bolt (7) is filled with a chemical adhesive; the connecting end of the chemical anchor bolt (7) passes through the corresponding connecting hole and is connected to a nut (8).

5. The waterproof connection structure between a new floor and an existing building according to claim 4, characterized in that: A first gasket (9) is provided between the water-stop steel plate (3) and the original building (1); A second gasket (10) is provided between the nut (8) and the water-stop steel plate (3).

6. The waterproof connection structure between a new floor and an existing building according to claim 5, characterized in that: The first gasket (9) is a rubber gasket; the thickness of the first gasket (9) is 4 mm to 8 mm.

7. The waterproof connection structure between a new floor and an existing building according to claim 1, characterized in that: The original building (1) is provided with a rebar hole (11) on the side of the connection with the newly added floor (2), and the rebar ends of the upper steel bars (41) and the lower steel bars (42) are respectively inserted into the corresponding rebar holes (11), and the gaps between the upper steel bars (41), the lower steel bars (42) and the rebar holes (11) are filled with underwater rebar glue.

8. A waterproof connection structure between a new floor and an existing building according to any one of claims 1 to 7, characterized in that: The depth of the groove (5) is 10 mm to 15 mm.

9. A waterproof connection structure between a new floor and an existing building according to any one of claims 1 to 7, characterized in that: The original building (1) is the original structural beam; the newly added floor slab (2) is a newly added roof slab or a newly added basement top slab.

10. A waterproof connection structure between a new floor and an existing building according to any one of claims 1 to 7, characterized in that: The side surface of the end of the water-stop steel plate (3) connected to the original building (1) is a rough surface.

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