Waterproof structure at joint of concrete bottom plates of new and old buildings

Abstract

The utility model belongs to the technical field of building waterproof engineering, and particularly relates to a waterproof structure at the joint of new and old building concrete bottom plates, which comprises a waterproof mechanism, a first mounting groove and a second mounting groove are respectively arranged at the joint of the old concrete bottom plate and the top surface of the new concrete bottom plate, and the waterproof mechanism comprises a waterproof plate, the waterproof plate is fixed in the first mounting groove and the second mounting groove, and water guide grooves are formed in the top surface and the bottom surface of the waterproof plate; a heat preservation rock wool filling layer; a waterproof film; the waterproof board and the heat preservation rock wool filling layer are arranged, the water guide grooves are formed in the top face and the bottom face of the waterproof board, heat preservation can be conducted on the connection position, the influence of thermal expansion and cold contraction on connection is reduced, the water guide grooves can guide rainwater on one hand, and on the other hand, the waterproof board has certain stretching and bending performance; and the influence on the connection stability and the sealing performance when the concrete bottom plates of the new and old buildings generate settlement displacement is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of building waterproof engineering, and specifically relates to a waterproof structure at the junction of new and old building concrete bottom plates. Background Art

[0002] In construction projects, the connection between the new and old building concrete slabs is usually achieved by grooving, implanting steel bars and steel plates, and then pouring concrete, so that the new and old building concrete slabs can be connected.

[0003] In the prior art, there is often a gap at the junction of the concrete base plates of new and old buildings, and a waterproof membrane is usually implanted in the gap for waterproofing. However, it is difficult to ensure the waterproof effect by relying solely on the waterproof membrane.

[0004] It was retrieved that in the prior art, a Chinese utility model patent with authorization announcement number CN216196849U disclosed "a waterproof structure at the junction of new and old concrete bottom slabs of buildings", including: a bottom slab layer, a junction area, a waterproof membrane, an asphalt waterproof coating, a first concrete layer, a first waterstop, a second waterstop, an extruded board, a casting strip layer, and a second concrete layer. The first waterstop is located between the first concrete layer and the waterproof membrane, an asphalt waterproof coating is provided on the side wall of the junction area above the waterproof membrane, an extruded board is fixedly connected to the top surface of the second waterstop, and a casting strip layer is provided between one side of the extruded board and the junction area.

[0005] Although the waterproof structures in the prior art including those mentioned above can meet general waterproofing needs, in actual use, due to the influence of harsh environment, especially the continuous scouring of concrete base plates by rainwater, the concrete base plates of new and old buildings will produce different degrees of settlement displacement in the longitudinal direction, causing gaps between the concrete layer and the top hydrophobic plate, which will not only reduce the stability of the connection between the concrete base plates of the new and old buildings, but also reduce the sealing of the connection.

[0006] In order to solve the above problems, the utility model proposes a waterproof structure at the junction of new and old building concrete bottom plates. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a waterproof structure for the joint of the concrete bottom plates of new and old buildings, which has the characteristics of easy use, high stability and good waterproof effect.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waterproof structure at the junction of the old and new concrete bottom plates, comprising a waterproof mechanism, the waterproof mechanism is fixed to the junction position of the top surface of the old concrete bottom plate and the new concrete bottom plate, and has a first installation groove and a second installation groove at the junction position of the top surface of the old concrete bottom plate and the new concrete bottom plate, respectively, the waterproof mechanism comprises:

[0009] A waterproof board, which is fixed in the first installation groove and the second installation groove, and water guide grooves are provided on both the top surface and the bottom surface of the waterproof board;

[0010] A thermal insulation rock wool filling layer. A cavity is provided in the waterproof board, and the thermal insulation rock wool filling layer is fixed in the cavity;

[0011] A waterproof membrane, which is fixed to the bottom surface of the waterproof board.

[0012] As a preferred technical solution of the present utility model, the waterproof board is a galvanized steel plate.

[0013] As a preferred technical solution of the present utility model, the length of the waterproof board is equal to the sum of the lengths of the first installation groove and the second installation groove.

[0014] As a preferred technical solution of the present utility model, a first pouring groove is provided in the first installation groove for forming a first connecting convex edge at the end of the old concrete bottom plate, and a connecting groove is provided at the bottom end of the new concrete bottom plate for forming a second connecting convex edge at the end of the new concrete bottom plate. The first connecting convex edge is embedded in the connecting groove, and the second connecting convex edge is embedded in the first pouring groove.

[0015] As a preferred technical solution of the present utility model, the width of the first connecting convex edge is equal to the width of the second connecting convex edge.

[0016] As a preferred technical solution of the present utility model, it further includes:

[0017] Embedded steel bars, which are located in the old concrete bottom plate, and the ends of the embedded steel bars extend out of the end face of the joint of the old concrete bottom plate.

[0018] As a preferred technical solution of the present utility model, it further includes:

[0019] A waterproof pad, which is fixed between the top surface of the first connecting convex edge and the bottom surface of the second connecting convex edge.

[0020] As a preferred technical solution of the present utility model, it further includes:

[0021] A water-swellable waterstop. A sealing groove is machined on the outer side surface of the waterproof board, and the water-swellable waterstop is fixed in the sealing groove.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] In the present utility model, through the provided waterproof board and thermal insulation rock wool filling layer, and with water guide grooves on both the top and bottom surfaces of the waterproof board, heat preservation can be achieved at the connection position, reducing the influence of thermal expansion and contraction on the connection. On the one hand, the water guide grooves can divert rainwater, and on the other hand, they endow the waterproof board with certain stretching and bending properties, reducing the influence on the connection stability and sealing performance when the concrete bottom plates of old and new buildings undergo settlement displacement.

[0024] Other additional advantages and beneficial effects of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0025] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0026] Figure 1 is a structural schematic diagram of the present utility model;

[0027] Figure 2 is of the present utility model Figure 1 amplified structural schematic diagram of the waterproof mechanism therein;

[0028] Figure 3 is an axonometric structural schematic diagram of the waterproof board of the present utility model;

[0029] Figure 4 is of the present utility model Figure 1 amplified structural schematic diagram of the position A therein;

[0030] Figure 5 is an axonometric structural schematic diagram of the old concrete bottom plate of the present utility model;

[0031] Figure 6 is an axonometric structural schematic diagram of the new concrete bottom plate of the present utility model.

[0032] In the figure: 1, old concrete bottom plate; 11, first installation groove; 12, first pouring groove; 13, first connecting convex edge; 14, embedded steel bars; 2, new concrete bottom plate; 21, second installation groove; 22, connecting groove; 23, second connecting convex edge; 3, waterproof mechanism; 31, waterproof board; 311, cavity; 312, water guide groove; 313, sealing groove; 32, thermal insulation rock wool filling layer; 33, waterproof membrane; 34, waterproof pad; 35, water-swelling waterstop belt. Detailed Embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-6 , the present invention provides the following technical solutions: A waterproof structure at the joint of the old and new building concrete floors, including a waterproof mechanism 3. The waterproof mechanism 3 is fixed at the top joint position of the old concrete floor 1 and the new concrete floor 2, and there are a first installation groove 11 and a second installation groove 21 at the top joint position of the old concrete floor 1 and the new concrete floor 2 respectively. The waterproof mechanism 3 includes: a waterproof board 31, a thermal insulation rock wool filling layer 32, and a waterproof membrane 33.

[0035] Furthermore, as shown by Figures 1-3 , in this embodiment, the waterproof board 31 is fixed in the first installation groove 11 and the second installation groove 21, and there are water guide grooves 312 on both the top and bottom surfaces of the waterproof board 31. There is a cavity 311 in the waterproof board 31. The thermal insulation rock wool filling layer 32 is fixed in the cavity 311. The waterproof membrane 33 is fixed to the bottom surface of the waterproof board 31. After adopting the above scheme, during use, the new concrete floor 2 is poured at the joint end of the old concrete floor 1, and the first installation groove 11 and the second installation groove 21 are reserved respectively at the top surface of the joint end of the old concrete floor 1 and the new concrete floor 2. Then the waterproof membrane 33 is adhesively fixed to the bottom surface of the waterproof board 31, and then the waterproof board 31 is fixed in the first installation groove 11 and the second installation groove 21 using expansion bolts. The waterproof membrane 33 and the waterproof board 31 are used for waterproofing. The present invention, through the provided waterproof board 31 and thermal insulation rock wool filling layer 32, and with water guide grooves 312 on both the top and bottom surfaces of the waterproof board 31, can insulate the joint position, reduce the influence of thermal expansion and contraction on the joint, and the water guide grooves 312 can, on the one hand, divert rainwater, and on the other hand, enable the waterproof board 31 to have a certain stretching and bending performance, reducing the influence of settlement displacement of the old and new building concrete floors on the joint stability and sealing performance.

[0036] It should be noted that the waterproof membrane 33 is preferably made of polyethylene waterproof and breathable membrane, which not only has good waterproof performance but also has breathability.

[0037] Preferably, as shown by Figures 1-3 , in this embodiment, the waterproof board 31 is a galvanized steel plate, which has good corrosion resistance and a long service life.

[0038] Preferably, as shown by Figures 1-3As shown in the figure, in this embodiment, the length of the waterproof board 31 is equal to the sum of the lengths of the first installation groove 11 and the second installation groove 21. After adopting the above solution, after the waterproof board 31 is fixed in the first installation groove 11 and the second installation groove 21, the end face of the waterproof board 31 is closely attached to the inner walls of the first installation groove 11 and the second installation groove 21, further improving the stability and sealing performance of the connection.

[0039] Preferably, as Figure 1 , Figure 2 , Figure 5 and Figure 6 shown, in this embodiment, there is a first pouring groove 12 in the first installation groove 11 for forming a first connecting convex edge 13 at the end of the old concrete bottom plate 1. There is a connecting groove 22 at the bottom end of the new concrete bottom plate 2 for forming a second connecting convex edge 23 at the end of the new concrete bottom plate 2. The first connecting convex edge 13 is embedded in the connecting groove 22, and the second connecting convex edge 23 is embedded in the first pouring groove 12 for positioning the pouring of the new concrete bottom plate 2, and at the same time further improving the stability of the connection between the new concrete bottom plate 2 and the old concrete bottom plate 1.

[0040] Preferably, as Figure 1 , Figure 2 , Figure 5 and Figure 6 shown, in this embodiment, the width of the first connecting convex edge 13 is equal to the width of the second connecting convex edge 23. After adopting the above solution, after the new concrete bottom plate 2 and the old concrete bottom plate 1 are connected, the end of the first connecting convex edge 13 abuts against the inner wall of the connecting groove 22, and the end face of the second connecting convex edge 23 abuts against the inner wall of the first pouring groove 12, further improving the stability of the connection between the new concrete bottom plate 2 and the old concrete bottom plate 1.

[0041] Preferably, as Figure 1 , Figure 2 , Figure 5 and Figure 6 shown, in this embodiment, it further includes: embedded steel bars 14. The embedded steel bars 14 are located in the old concrete bottom plate 1, and the ends of the embedded steel bars 14 extend out of the end face of the connection part of the old concrete bottom plate 1. After adopting the above solution, it can effectively improve the stability of the pouring of the new concrete bottom plate 2, thereby improving the stability of the connection between the new concrete bottom plate 2 and the old concrete bottom plate 1.

[0042] It should be noted that during actual use, steel bars need to be welded and fixed to the embedded steel bars 14 to serve as the pouring skeleton of the new concrete bottom plate 2 to ensure the stability of the new concrete bottom plate 2.

[0043] Preferably, as Figure 1 and Figure 2As shown, in this embodiment, it further includes: a waterproof pad 34, which is fixed between the top surface of the first connecting convex edge 13 and the bottom surface of the second connecting convex edge 23. After adopting the above solution, after the new concrete floor slab 2 is connected to the old concrete floor slab 1, the waterproof pad 34 shrinks, further improving the sealing performance of the connection between the new concrete floor slab 2 and the old concrete floor slab 1 and enhancing the waterproof effect.

[0044] It should be noted that in this utility model, the waterproof pad 34 is preferably made of ethylene propylene diene monomer (EPDM) rubber. EPDM rubber has good corrosion resistance, ozone resistance, heat resistance, weather resistance, and good low-temperature flexibility, and can be used in ozone-resistant, weather-resistant, and ultraviolet-resistant occasions.

[0045] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, it further includes: a water-swellable waterstop 35. A sealing groove 313 is machined on the outer side surface of the waterproof board 31, and the water-swellable waterstop 35 is fixed in the sealing groove 313. After adopting the above solution, by setting the water-swellable waterstop 35, when rainwater enters the gap around the waterproof board 31, the water-swellable waterstop 35 will expand when it comes into contact with the rainwater, and then squeeze the inner wall of the sealing groove 313 and the inner walls of the first installation groove 11 and the second installation groove 21, further enhancing the sealing and waterproof effect and preventing rainwater from seeping into the connection position between the new concrete floor slab 2 and the old concrete floor slab 1.

[0046] The components not described in detail in this article are prior art.

[0047] The working principle and usage process of this utility model: For the waterproof structure of this utility model, during use, the new concrete floor slab 2 is poured at the connection end of the old concrete floor slab 1, and a first installation groove 11 and a second installation groove 21 are respectively reserved on the top surface of the connection end between the old concrete floor slab 1 and the new concrete floor slab 2;

[0048] Then, the waterproof film 33 is adhesively fixed to the bottom surface of the waterproof board 31, and then the waterproof board 31 is fixed in the first installation groove 11 and the second installation groove 21 using expansion bolts to achieve waterproofing with the waterproof film 33 and the waterproof board 31;

[0049] This utility model, by setting the waterproof board 31 and the thermal insulation rock wool filling layer 32, and having water guide grooves 312 on both the top surface and the bottom surface of the waterproof board 31, can insulate the connection position, reduce the influence of thermal expansion and contraction on the connection. On the one hand, the water guide grooves 312 can divert rainwater, and on the other hand, they enable the waterproof board 31 to have a certain degree of expansion, contraction, and bending performance, reducing the influence of settlement displacement of the new and old building concrete floor slabs on the connection stability and sealing performance;

[0050] In addition, through the water-swellable water stop 35 provided, when rainwater enters the gap outside the waterproof board 31, the water-swellable water stop 35 will swell when it comes into contact with the rainwater, and then squeeze the inner wall of the sealing groove 313 and the inner walls of the first installation groove 11 and the second installation groove 21, further improving the sealing and waterproof effect.

[0051] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A waterproof structure at the joint of the concrete floor slabs of old and new buildings, comprising a waterproof mechanism (3). The waterproof mechanism (3) is fixed at the top joint position of the old concrete floor slab (1) and the new concrete floor slab (2), and a first installation groove (11) and a second installation groove (21) are respectively provided at the top joint position of the old concrete floor slab (1) and the new concrete floor slab (2). It is characterized in that, The waterproof mechanism (3) includes: A waterproof board (31), which is fixed in the first installation groove (11) and the second installation groove (21), and water guide grooves (312) are provided on both the top surface and the bottom surface of the waterproof board (31); A thermal insulation rock wool filling layer (32), a cavity (311) is provided in the waterproof board (31), and the thermal insulation rock wool filling layer (32) is fixed in the cavity (311); A waterproof membrane (33), which is fixed to the bottom surface of the waterproof board (31).

2. The waterproof structure at the joint of the concrete floor slabs of new and old buildings according to claim 1, characterized in that: The waterproof board (31) is a galvanized steel plate.

3. The waterproof structure at the joint of the concrete floor slabs of new and old buildings according to claim 1, wherein: The length of the waterproof board (31) is equal to the sum of the lengths of the first installation groove (11) and the second installation groove (21).

4. The waterproof structure at the joint of the concrete floor slabs of new and old buildings according to claim 1, wherein: A first pouring groove (12) is provided in the first installation groove (11) for forming a first connecting convex edge (13) at the end of the old concrete floor slab (1). A connecting groove (22) is provided at the bottom end of the new concrete floor slab (2) for forming a second connecting convex edge (23) at the end of the new concrete floor slab (2). The first connecting convex edge (13) is embedded in the connecting groove (22), and the second connecting convex edge (23) is embedded in the first pouring groove (12).

5. The waterproof structure at the joint of the concrete floor slabs of new and old buildings according to claim 4, characterized in that: The width of the first connecting convex edge (13) is equal to the width of the second connecting convex edge (23).

6. The waterproof structure at the connection of the old and new building concrete floor slabs according to claim 1, characterized in that: It further includes: Embedded steel bars (14), which are located in the old concrete floor slab (1), and the ends of the embedded steel bars (14) extend out of the joint end face of the old concrete floor slab (1).

7. The waterproof structure at the joint of the old and new building concrete floors as claimed in claim 5, characterized in that: It further includes: A waterproof pad (34), which is fixed between the top surface of the first connecting convex edge (13) and the bottom surface of the second connecting convex edge (23).

8. The waterproof structure at the joint of the concrete floor slabs of new and old buildings according to claim 1, characterized in that: It further includes: A water-swellable waterstop (35), a sealing groove (313) is machined on the outer side surface of the waterproof board (31), and the water-swellable waterstop (35) is fixed in the sealing groove (313).

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