Raft foundation waterproofing and protection layer anti-floating device

Abstract

This utility model discloses a waterproofing and anti-buoyancy device for raft foundation base, relating to the field of underground foundation slab waterproofing technology. The utility model includes a base layer and PVC pipes. A blind drain channel is formed inside the base layer, and a drainage pit is formed on the inner side of the base layer, located in the middle of the blind drain channel. The bottom level of the drainage pit is lower than the bottom level of the blind drain channel. The blind drain channel is filled with a layer of crushed stone. A crushed stone barrier frame is engaged on the inner side of the drainage pit, and several sets of crushed stone barrier nets are evenly spaced on the inner side of the crushed stone barrier frame. The crushed stone barrier frame is filled with a layer of crushed stone for the drainage pit, and a PVC pipe is embedded inside the crushed stone layer of the drainage pit. This utility model can provide better drainage function when the underground foundation slab encounters seepage in the foundation pit or after rain, thereby allowing timely drainage of accumulated water and ensuring normal construction of the foundation slab.

Description

Technical Field

[0001] This utility model relates to the field of waterproofing technology for underground foundation slabs, specifically a waterproofing and anti-buoyancy device for raft foundation bases. Background Technology

[0002] During the construction of the basement foundation and waterproofing, groundwater control is particularly important. Different projects will adopt different measures for surrounding dewatering, such as water-stop curtains, wellpoint dewatering, etc. However, even if corresponding dewatering measures are taken, water seepage may still occur in the foundation during the later construction of the foundation and waterproofing membrane, causing the waterproofing membrane to bulge after it is laid, which will affect the quality of the project.

[0003] To prevent the waterproofing membrane from floating due to rain or seepage in the foundation pit after the membrane is installed, anti-floating measures should be set up in advance according to the amount of water and drainage should be carried out to avoid affecting the construction of the waterproofing protective layer and the raft foundation reinforcement binding. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a waterproof and anti-buoyancy device for raft foundation base, which can provide better drainage function when the underground foundation slab encounters pit seepage or rainy weather, so as to allow timely drainage of accumulated water and ensure normal construction of the foundation slab.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a raft foundation waterproofing and protective layer anti-buoyancy device, comprising a base layer and a PVC pipe, wherein a blind ditch channel is formed inside the base layer, and a drainage pit is formed on the inner side of the base layer and in the middle of the blind ditch channel, the bottom horizontal plane of the drainage pit is lower than the bottom horizontal plane of the blind ditch channel, the blind ditch channel is filled with a layer of crushed stone, a crushed stone barrier frame is engaged on the inner side of the drainage pit, and several sets of crushed stone barrier nets are formed at equal intervals on the inner side of the crushed stone barrier frame, and the inside of the crushed stone barrier frame is filled with a layer of crushed stone for the drainage pit, and a PVC pipe is embedded inside the crushed stone layer for the drainage pit.

[0006] By adopting the above technical solution, the subgrade serves as the foundation of the entire device. The blind drain channels and drainage pits within it form the main framework of the drainage system. The blind drain channels are filled with a layer of crushed stone, which has good permeability and can effectively collect and guide water from the subgrade, ensuring smooth water flow. At the same time, the bottom level of the drainage pit is lower than the bottom level of the blind drain channels. This design allows water to flow naturally into the drainage pit, further enhancing the drainage effect. The crushed stone barrier frame and several sets of crushed stone barrier nets evenly spaced inside the drainage pit play a key role in filtering and blocking. The crushed stone barrier nets can filter out impurities that may be carried in the blind drain channels, preventing them from entering the drainage pit and clogging the PVC pipes. In addition, the crushed stone layer inside the crushed stone barrier frame not only further enhances the drainage effect but also provides a stable burial environment for the PVC pipes. The PVC pipes buried inside the gravel layer of the drainage pit are the core components of the entire drainage system. They are responsible for draining the water from the drainage pit, thereby ensuring the dryness and stability of the subgrade.

[0007] Furthermore, a waterproof padding layer is laid on top of the base layer, the blind drain gravel layer, the drainage pit gravel layer, and the gravel barrier net, forming an integrated structure, and the waterproof padding layer is installed through the PVC pipe.

[0008] By adopting the above technical solution, the waterproof padding is laid on top of these components and forms an integrated structure with them. This design significantly enhances the waterproof performance of the entire drainage system. The waterproof padding is installed through the PVC pipe. This design ensures that the PVC pipe can perform its drainage function normally, and also ensures the integrity and waterproof effect of the waterproof padding.

[0009] Furthermore, a sealing ring is fixed at the connection between the PVC pipe and the waterproof pad.

[0010] By adopting the above technical solution, the sealing ring can ensure a tight and seamless connection between the waterproof gasket and the PVC pipe, preventing water from seeping in from the connection point, thereby ensuring the integrity of the waterproof gasket and the waterproof effect of the entire drainage system.

[0011] Furthermore, a control valve is provided on the top of the outer side of the PVC pipe, and a self-priming water pump is provided on the top of the PVC pipe.

[0012] By adopting the above technical solution, the control valve installed on the top of the outer side of the PVC pipe can be opened and closed manually or automatically, thereby controlling the flow of water inside the PVC pipe. When the water inside the drainage pit cannot be discharged naturally by gravity, or when it is necessary to speed up the drainage, the self-priming water pump can be started. The self-priming water pump can use its strong suction to draw water from the PVC pipe and discharge it to the designated location, thereby ensuring the normal operation and efficient drainage of the drainage system.

[0013] Furthermore, the bottom of the PVC pipe is lower than the bottom horizontal level of the blind drain channel.

[0014] By adopting the above technical solution, the PVC pipe, as a key component of the drainage system, is responsible for draining accumulated water from areas such as drainage pits and trenches. The design, which places its bottom end below the bottom level of the blind drain, ensures that water in the blind drain can flow naturally towards the PVC pipe under gravity, thus smoothly entering the drainage system and being discharged.

[0015] In summary, the present invention has the following main advantages:

[0016] This utility model incorporates a blind drain channel, a drainage pit, a gravel barrier net, and a gravel barrier frame. The blind drain channel is constructed within the subgrade and filled and compacted with a gravel layer. This gravel layer has gaps to allow water flow. A drainage pit is located in the middle of the blind drain channel, connecting it to the drainage pit. The drainage pit is filled with a gravel layer, allowing water flowing through the gravel layer in the blind drain channel to be introduced into it. A gravel barrier frame is installed inside the drainage pit, and gravel barrier nets are installed around the frame to filter and block impurities within the blind drain channel, thus preventing blockage of the PVC pipes buried within the gravel layer of the drainage pit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the waterproof padding layer of this utility model in its unlaid state;

[0019] Figure 3 This is a schematic diagram of the connection structure between the gravel barrier net and the gravel barrier frame of this utility model;

[0020] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the horizontal cross-sectional structure of the blind ditch channel and drainage pit channel of this utility model.

[0022] In the diagram: 1. Subgrade; 2. Blind drain channel; 3. Drainage pit; 4. Blind drain gravel layer; 5. Drainage pit gravel layer; 6. Waterproof underlayment; 7. PVC pipe; 8. Control valve; 9. Sealing ring; 10. Self-priming water pump; 11. Gravel barrier net; 12. Gravel barrier frame. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In this embodiment:

[0025] A waterproofing and anti-buoyancy protection device for raft foundation, such as Figures 1-5 As shown, the system includes a base layer 1 and a PVC pipe 7. A blind drain channel 2 is formed inside the base layer 1, and a drainage pit 3 is formed on the inner side of the base layer 1 and in the middle of the blind drain channel 2. The bottom horizontal plane of the drainage pit 3 is lower than the bottom horizontal plane of the blind drain channel 2. The blind drain channel 2 is filled with a blind drain gravel layer 4. A gravel barrier frame 12 is engaged on the inner side of the drainage pit 3, and several sets of gravel barrier nets 11 are formed at equal intervals on the inner side of the gravel barrier frame 12. The gravel barrier frame 12 is filled with a drainage pit gravel layer 5, and a PVC pipe 7 is buried inside the drainage pit gravel layer 5.

[0026] The foundation layer 1 serves as the basic support for the entire system, with blind drain channels 2 and drainage pits 3 forming the basic framework of the drainage system. The blind drain channel 2 is filled with a layer of crushed stone 4, which has excellent permeability, efficiently collecting and guiding water flow from the foundation layer, ensuring smooth water flow. Simultaneously, the bottom of the drainage pit 3 is lower than the bottom of the blind drain channel 2, allowing water to naturally converge there under gravity, improving drainage efficiency. The crushed stone barrier frame 12 and its internal crushed stone barrier net 11 installed inside the drainage pit 3 effectively intercept impurities from the blind drain channel 2, preventing them from flowing into the drainage pit 3 and clogging the PVC pipe 7. Furthermore, the crushed stone layer 5 within the crushed stone barrier frame 12 further optimizes drainage performance and provides stable burial conditions for the PVC pipe 7. As the core of the drainage system, the PVC pipe 7, buried in the crushed stone layer 5, is responsible for draining accumulated water from the drainage pit 3, thereby maintaining the dryness and stability of the foundation layer.

[0027] See Figure 1 and Figure 4 The top of the base layer 1, the blind drain gravel layer 4, the drainage pit gravel layer 5 and the gravel barrier net 11 is covered with a waterproof pad 6, which forms an integrated structure, and the waterproof pad 6 is connected to the PVC pipe 7 in a through-type arrangement.

[0028] The waterproof underlayment 6 is laid on top of the relevant components of the subfloor, tightly integrated with these components to form an integral structure, effectively improving the waterproof capability of the entire drainage system. Simultaneously, the waterproof underlayment 6 is specially designed to penetrate and connect with the PVC pipe 7. This construction ensures that the drainage function of the PVC pipe 7 is not affected, while maintaining the sealing and waterproof performance of the waterproof underlayment 6.

[0029] See Figure 1 , Figure 4 and Figure 5 A sealing ring 9 is fixed at the connection between the PVC pipe 7 and the waterproof pad 6;

[0030] The sealing ring 9 is tightly fitted at the connection between the waterproof pad 6 and the PVC pipe 7, effectively preventing water seepage, maintaining the integrity of the waterproof pad 6, and ensuring the overall waterproof performance of the drainage system.

[0031] See Figure 1 , Figure 2 , Figure 4 and Figure 5 A control valve 8 is provided on the top of the outer side of the PVC pipe 7, and a self-priming water pump 10 is provided on the top of the PVC pipe 7.

[0032] The PVC pipe 7 is equipped with a control valve 8 that can be operated manually or automatically to flexibly regulate the water flow inside the pipe. If the water in the drainage pit 3 cannot be drained naturally by gravity, or if it is necessary to accelerate drainage, the self-priming water pump 10 can be started to use its strong suction to draw water out of the PVC pipe 7 and discharge it to a designated place, thereby ensuring the stable and efficient operation of the drainage system.

[0033] See Figure 5 The bottom of the PVC pipe 7 is lower than the bottom horizontal plane of the blind drain 2;

[0034] Among them, PVC pipe 7 is the core component of the drainage system, which is responsible for draining water accumulated in areas such as drainage pit 3. Its bottom end is designed to be lower than the bottom of blind ditch 2, so that the water in blind ditch 2 can automatically flow into PVC pipe 7 by gravity and be discharged.

[0035] The implementation principle of this embodiment is as follows: First, a blind ditch channel 2 is excavated on the base layer 1, and a drainage pit 3 is excavated in the middle of the blind ditch channel 2. Then, a gravel barrier frame 12 is inserted into the inner side of the drainage pit 3, and the gravel barrier net 11 inside the gravel barrier frame 12 is used to block the connection between the blind ditch channel 2 and the drainage pit 3. Subsequently, the blind ditch channel 2 and the drainage pit 3 are filled with a blind ditch gravel layer 4 and a drainage pit gravel layer 5, respectively, so that the interior of the blind ditch channel 2 and the drainage pit 3 has good water permeability and stability. Then, when filling the drainage pit gravel layer 5, the PVC pipe 7 can be buried in the drainage pit gravel layer 5. Inside the PVC pipe 7, the bottom end of the PVC pipe 7 is lower than the bottom surface of the blind drain 2. After the PVC pipe 7 is buried, a waterproof pad 6 can be laid on top of the base layer 1, the blind drain gravel layer 4, the drainage pit gravel layer 5, and the gravel barrier net 11. The PVC pipe 7 passes through the waterproof pad 6. Finally, a sealing ring 9 is installed at the connection between the waterproof pad 6 and the PVC pipe 7. At the same time, a control valve 8 is set on the upper side of the PVC pipe 7 to control the flow of water inside the PVC pipe 7. Furthermore, a self-priming water pump 10 is connected to the top of the PVC pipe 7. Through the connection with the external water pipe, the water stored in the drainage pit 3 is pumped out through the PVC pipe 7.

[0036] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A raft foundation waterproofing and protection layer anti-floating device, characterized in that: Includes the base layer (1) and PVC pipe (7); The base layer (1) has a blind drain channel (2) inside, and a drainage pit (3) is provided on the inner side of the base layer (1) and in the middle of the blind drain channel (2). The bottom horizontal plane of the drainage pit (3) is lower than the bottom horizontal plane of the blind drain channel (2). The blind drain channel (2) is filled with a blind drain gravel layer (4). A gravel barrier frame (12) is engaged on the inner side of the drainage pit (3). Several sets of gravel barrier nets (11) are provided at equal intervals on the inner side of the gravel barrier frame (12). The gravel barrier frame (12) is filled with a drainage pit gravel layer (5). A PVC pipe (7) is buried inside the drainage pit gravel layer (5).

2. The raft foundation waterproofing and protection layer anti-floating device according to claim 1, characterized in that: A waterproof padding layer (6) is laid on top of the base layer (1), the blind drain gravel layer (4), the drainage pit gravel layer (5) and the gravel barrier net (11), forming an integrated structure, and the waterproof padding layer (6) and the PVC pipe (7) are connected in a through-hole arrangement.

3. The raft foundation waterproofing and protection layer anti-floating device according to claim 1, characterized in that: A sealing ring (9) is fixed at the connection between the PVC pipe (7) and the waterproof pad (6).

4. The raft foundation waterproofing and protection layer anti-floating device according to claim 1, characterized in that: A control valve (8) is provided on the top of the outer side of the PVC pipe (7), and a self-priming water pump (10) is provided on the top of the PVC pipe (7).

5. The raft foundation waterproofing and protection layer anti-floating device according to claim 1, characterized in that: The bottom height of the PVC pipe (7) is lower than the bottom horizontal level of the blind drain channel (2).

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