A waterproof structure for underground structural slab and diaphragm wall

Abstract

This invention discloses a waterproof structure for an underground structural base slab and a diaphragm wall, including a foundation pit sealing layer, a base slab cast on the foundation pit sealing layer, a wall on the base slab, a water-stopping component between the base slab and the wall, and a water-stopping copper sheet at the junction of the base slab and the wall. One end of the water-stopping copper sheet is embedded in the base slab, and the other end is embedded in the wall. A water collection groove is formed on the base slab, close to the inner wall of the wall. A water-guiding component is provided between the water collection groove and the water-stopping component. The advantages are: when water accumulates in the foundation pit or groundwater seeps inward through the gap between the base slab and the wall, the first water-stopping plate, the stepped seal formed by the groove and protrusion, the second water-stopping plate, and the water-stopping copper sheet all play a water-stopping role. Furthermore, when the first water-stopping component fails, the latter automatically blocks the liquid, resulting in good waterproofing for the underground structural base slab and the diaphragm wall.

Description

Technical Field

[0001] This invention relates to the field of waterproofing technology for underground buildings, and more particularly to a waterproofing structure for an underground structural base slab and underground continuous wall. Background Technology

[0002] Currently, many construction projects involve basement structures. Through mechanical excavation, hoisting of steel cages, and concrete pouring, underground structural slabs and diaphragm walls can be vertically arranged as water-cutting, seepage-proof, load-bearing, and water-retaining structures. Therefore, the sealing between the two is crucial to prevent leakage. However, the underground structural slab and diaphragm walls bear external water pressure, and leakage mainly occurs at the structural joints of the slab and the joints of the diaphragm walls. Conventional waterproofing structures have a short service life, poor waterproofing effect, and no additional waterproofing measures can be taken to remedy the failure of the waterproofing structure. Therefore, we propose a waterproofing structure for underground structural slabs and diaphragm walls. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of short service life, poor waterproofing effect, and lack of additional waterproofing measures to remedy the failure of conventional waterproofing structures in the prior art. Therefore, this invention proposes a waterproofing structure for the base slab and underground continuous wall of an underground structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A waterproof structure for an underground structure base slab and a continuous underground wall includes a foundation pit sealing layer, a base slab cast on the foundation pit sealing layer, a wall on the base slab, a water-stopping component between the base slab and the wall, a water-stopping copper sheet at the junction of the base slab and the wall, one end of the water-stopping copper sheet being embedded in the base slab and the other end being embedded in the wall, a water collection groove being formed on the base slab and close to the inner wall of the wall, a water-guiding component being provided between the water collection groove and the water-stopping component, and a fixing component being provided on the inner side of the wall.

[0006] Furthermore, the fixing component includes a horizontal connecting plate, with a steel section fixed between the end of the horizontal connecting plate and the wall, and the steel section embedded in the wall. A bracket is fixed between the horizontal connecting plate and the base plate, and multiple stop sleeves are provided through the horizontal connecting plate.

[0007] Furthermore, multiple suspension buckles are fixedly installed on the inner side wall of the wall, and the multiple suspension buckles together support a horizontal pipe. The bottom of the horizontal pipe is connected to multiple vertical pipes, and each vertical pipe passes through a corresponding stop sleeve and extends into the water collection tank. The upper part of the horizontal pipe is connected to a main pipe.

[0008] Furthermore, the water-stopping component includes a first water-stop plate, a second water-stop plate, and a seepage pipe. The first water-stop plate, the second water-stop plate, and the seepage pipe are all located at the junction of the base plate and the wall. The first water-stop plate and the second water-stop plate are both arc-shaped, and their openings face the seepage pipe. The upper part of the seepage pipe has multiple seepage holes.

[0009] Furthermore, a first supporting half-shell is fixed at the bottom of the wall, and a hollow supporting sleeve is provided between the first supporting half-shell and the seepage pipe. A second supporting half-shell is fixed on the base plate, and a sealing layer is provided between the second supporting half-shell and the seepage pipe.

[0010] Furthermore, a groove is formed on the lower end face of the first supporting half-shell, and a protrusion is integrally formed on the upper end face of the second supporting half-shell, wherein the specifications of the groove match the specifications of the protrusion.

[0011] Furthermore, the water intake assembly includes a water intake pipe, one end of which is sealed to the seepage pipe via a reducing adapter, the other end of which is connected to a water collection tank, and a one-way valve is provided on the water intake pipe.

[0012] Furthermore, an arc-shaped transition strip is fixedly provided on the inner bottom wall of the water collection tank, an overlapping edge is fixedly provided on the top of the water collection tank, and the bottom wall of the water collection tank is inclined downward.

[0013] The present invention has the following advantages:

[0014] 1. When water or groundwater accumulates in the foundation pit and seeps in through the gap between the base slab and the wall, the first water-stop plate, the stepped seal formed by the groove and the protrusion, the second water-stop plate, and the water-stop copper sheet can all play a role in stopping water. When the former fails to stop water, the latter will automatically block the liquid, so that the base slab of the underground structure and the underground continuous wall have good waterproof performance.

[0015] 2. The hollow support sleeve is made of rigid corrosion-resistant material, and the sealing layer is made of water-swellable rubber material. Therefore, after liquid enters the first and second support half shells, the sealing layer absorbs a small amount of liquid, and the remaining liquid will enter the seepage pipe through the seepage hole. Even if liquid passes through, it will be blocked by the subsequent second water stop plate, thus achieving excellent waterproof performance.

[0016] 3. The end of the fastening pin extending out of the first support half shell is fixed to the wall, and the end of the fastening pin extending out of the second support half shell is fixed to the base plate, thereby achieving the stability of the first and second support half shells. Furthermore, the seepage pipe is laid inside the first and second support half shells and will not be subjected to pressure from the base plate and the wall, which can effectively protect the structure of the seepage pipe, extend the service life of the seepage pipe, and prevent the seepage pipe from cracking under stress.

[0017] 4. The seepage pipe is higher than the collection tank. When there is liquid in the collection tank, the liquid in the seepage pipe can still be discharged into the collection tank under the action of gravity. The collection tank is an integral structure, which can effectively prevent the collected water from seeping into the bottom plate.

[0018] 5. By setting up suspension buckles, horizontal pipes, vertical pipes, and a main pipe, the main pipe can be connected to a water pump during subsequent maintenance, thereby pumping the water out of the collection tank and preventing the liquid accumulated in the collection tank from overflowing. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a waterproof structure for an underground structure base plate and an underground continuous wall proposed in this invention;

[0020] Figure 2 This is a schematic diagram showing the connection between the water-stopping component and the water diversion pipe in a waterproof structure for an underground structure base plate and a continuous underground wall, as proposed in this invention.

[0021] Figure 3 This is a cross-sectional view of a water-stopping component in a waterproof structure for an underground structure base plate and a continuous underground wall, as proposed in this invention.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a partial structural diagram of the first supporting half-shell in a waterproof structure for an underground structure base plate and underground continuous wall proposed in this invention.

[0024] Figure 6 This is a partial structural diagram of the second support plate half-shell in a waterproof structure for an underground structure base plate and underground continuous wall proposed in this invention.

[0025] Figure 7 This is a schematic diagram of the water collection trough in a waterproof structure for an underground structure base plate and a continuous underground wall proposed in this invention.

[0026] In the diagram: 1. Pit sealing layer, 2. Base plate, 3. Wall, 4. Steel section, 5. Horizontal connecting plate, 6. Support, 7. Stop sleeve, 8. Vertical pipe, 9. Horizontal pipeline, 10. Main pipe, 11. Suspension buckle, 12. Water collection trough, 121. Arc transition strip, 122. Overlap edge, 13. Water diversion pipe, 14. Water-stop copper sheet, 15. First water-stop plate, 16. Second water-stop plate, 17. First support half shell, 18. Second support half shell, 19. Variable diameter adapter, 20. Seepage pipe, 21. Seepage hole, 22. Fastening pin, 23. Hollow support sleeve, 24. Sealing layer, 25. Groove, 26. Protrusion, 27. One-way valve. Detailed Implementation

[0027] Reference Figure 1-2A waterproof structure for an underground structure's base slab and continuous underground wall includes a foundation pit sealing layer 1. First, a foundation pit is excavated in the construction area. After acceptance, the foundation pit sealing layer 1 is poured. A base slab 2 is poured on the foundation pit sealing layer 1, and a wall 3 is installed on the base slab 2. Before the concrete pouring of the base slab 2 and wall 3, procedures such as layout, waterproofing, and reinforcement laying are performed, which will not be elaborated here. A water-stop component is installed between the base slab 2 and wall 3, and a water-stop copper sheet 14 is installed at the junction of the base slab 2 and wall 3. One end is embedded in the base plate 2, and the other end of the water-stop copper sheet 14 is embedded in the wall 3. The concave surface of the water-stop copper sheet 14 faces the water-facing side to ensure that the water-stop copper sheet 14 undergoes elastic deformation after being compressed, thus preventing the water-stop copper sheet 14 from breaking. A water collection groove 12 is provided on the base plate 2, and the water collection groove 12 is close to the inner side wall of the wall 3. The water collection groove 12 is an integral structure, which can effectively prevent the collected water from seeping into the base plate 2. A water-guiding component is provided between the water collection groove 12 and the water-stop component, and a fixing component is provided on the inner side of the wall 3.

[0028] Reference Figure 1 The fixing components include a horizontal connecting plate 5, with a steel section 4 fixed between the end of the horizontal connecting plate 5 and the wall 3, and the steel section 4 is embedded in the wall 3. When the wall 3 is poured, a steel cage is tied at the corresponding position of the steel section 4 to form a fixed space for the steel section 4. A bracket 6 is fixed between the horizontal connecting plate 5 and the bottom plate 2, and the three are fixedly connected to each other. Multiple stop sleeves 7 are installed through the horizontal connecting plate 5.

[0029] Reference Figure 1 Multiple suspension buckles 11 are fixedly installed on the inner side wall of wall 3. The multiple suspension buckles 11 jointly support the horizontal pipe 9. The bottom of the horizontal pipe 9 is connected to multiple vertical pipes 8, and each vertical pipe 8 passes through the corresponding stop sleeve 7 and extends into the water collection tank 12. The stop sleeve 7 can reduce the shaking of the vertical pipe 8 and avoid significant wear of the vertical pipe 8. The upper part of the horizontal pipe 9 is connected to the main pipe 10. During subsequent construction, the outlet of the main pipe 10 can be reserved on the ground floor. The main pipe 10 can be connected to the water pump. The water pump can be turned on regularly to pump the water in the water collection tank 12 out through the main pipe 10, the horizontal pipe 9 and the vertical pipes 8 to prevent the liquid accumulated in the water collection tank 12 from overflowing. A filter screen can also be installed at the lower end of the vertical pipe 8 to prevent it from being blocked by mud and sand.

[0030] Reference Figure 2-3 The water-stopping assembly includes a first water-stop plate 15, a second water-stop plate 16, and a seepage pipe 20. The first water-stop plate 15, the second water-stop plate 16, and the seepage pipe 20 are all located at the junction of the base plate 2 and the wall 3. The first water-stop plate 15 and the second water-stop plate 16 are both arc-shaped, and their openings face the seepage pipe 20. The upper part of the seepage pipe 20 has multiple seepage holes 21. The first water-stop plate 15, the second water-stop plate 16, and the seepage pipe 20 have the same spacing.

[0031] Reference Figure 2-4 A first supporting half-shell 17 is fixed to the bottom of the wall 3. A perforated supporting sleeve 23 is provided between the first supporting half-shell 17 and the seepage pipe 20. The perforated supporting sleeve 23 is made of rigid corrosion-resistant material. A second supporting half-shell 18 is fixed on the base plate 2. A sealing layer 24 is provided between the second supporting half-shell 18 and the seepage pipe 20. The sealing layer 24 is made of water-swellable rubber. Fastening pins 22 are provided on the side walls of both the first supporting half-shell 17 and the second supporting half-shell 18, and the length of the fastening pins 22 is greater than that of the wall 3. The thickness of the first supporting half shell 17 and the second supporting half shell 18 are such that a groove is provided on the inner side wall of both the first supporting half shell 17 and the second supporting half shell 18. The end of the fastening pin 22 facing the seepage pipe 20 is located in the groove. Before pouring the base plate 2 and the wall 3, the first supporting half shell 17 and the second supporting half shell 18 are aligned and fixed. After pouring, the end of the fastening pin 22 extending out of the first supporting half shell 17 is fixed to the wall 3, and the end of the fastening pin 22 extending out of the second supporting half shell 18 is fixed to the base plate 2.

[0032] Reference Figure 5-6 The lower end face of the first supporting half-shell 17 is provided with a groove 25, and the upper end face of the second supporting half-shell 18 is integrally formed with a protrusion 26. The specifications of the groove 25 match the specifications of the protrusion 26, such as... Figure 4 As shown, the groove 25 and the protrusion 26 cooperate with each other to form a stepped seal.

[0033] Reference Figure 1-2 and Figure 7 The water intake assembly includes a water intake pipe 13. One end of the water intake pipe 13 is sealed and connected to the seepage pipe 20 by a reducing adapter 19. In actual construction, the wall 3 is constructed by pouring concrete in sections. The position of the reducing adapter 19 and the water intake pipe 13 should avoid the joint between the two sections of the wall 3. The other end of the water intake pipe 13 is connected to the water collection tank 12. The water intake pipe 13 is equipped with a one-way valve 27. The one-way valve 27 only allows the liquid in the water intake pipe 13 to flow towards the water collection tank 12, and does not allow it to flow in the opposite direction.

[0034] Reference Figure 7 An arc-shaped transition strip 121 is fixedly installed on the inner bottom wall of the water collection tank 12, and an overlapping edge 122 is fixedly installed on the top of the water collection tank 12. The overlapping edge 122 can guide the water accumulated at the junction of the bottom plate 2 and the wall 3 into the water collection tank 12. The bottom wall of the water collection tank 12 is inclined downward, and the insertion position of the vertical pipe 8 corresponds to the lowest point of the water collection tank 12. The height of the water collection tank 12 is lower than the height of the seepage pipe 20.

[0035] During construction, the foundation pit is first excavated in the construction area. After acceptance, the foundation pit sealing layer 1 is poured. Before the concrete pouring of the base slab 2 and wall 3, the processes of setting out lines, waterproofing, and laying steel bars are carried out, which will not be described in detail here. It should be noted that before pouring the base slab 2 and wall 3, the first support half shell 17 and the second support half shell 18 are aligned and fixed. After pouring, the end of the fastening pin 22 extending out of the first support half shell 17 is fixed to the wall 3, and the end of the fastening pin 22 extending out of the second support half shell 18 is fixed to the base slab 2. This achieves the stability of the first support half shell 17 and the second support half shell 18. Furthermore, the seepage pipe 20 is laid inside the first support half shell 17 and the second support half shell 18 and will not be subjected to the pressure of the base slab 2 and wall 3, which can effectively protect the structure of the seepage pipe 20.

[0036] When water or groundwater accumulates in the foundation pit and seeps in through the gap between the base plate 2 and the wall 3, the water-stop copper sheet 14, the first water-stop plate 15 and the second water-stop plate 16 can all play a role in stopping the water. If the first water-stop plate 15 fails, the liquid will flow to the connection between the first support half shell 17 and the second support half shell 18, and the stepped seal formed by the groove 25 and the protrusion 26 will block the liquid again.

[0037] The hollow support sleeve 23 is made of rigid corrosion-resistant material, allowing liquid to flow through the hollow support sleeve 23 to the seepage hole 21. The sealing layer 24 is made of water-swellable rubber material, preventing liquid from passing under the seepage pipe 20. Therefore, after some liquid enters the first support half shell 17 and the second support half shell 18, the sealing layer 24 absorbs a small amount of liquid, and the remaining liquid will enter the seepage pipe 20 through the seepage hole 21. Even if liquid passes through, it will be blocked by the subsequent second water stop plate 16, thus achieving excellent waterproof performance.

[0038] like Figure 3 As shown, the seepage hole 21 of the seepage pipe 20 only exists in the upper part. The seepage liquid can still be received by the seepage pipe 20. The liquid flows into the water collection tank 12 through the reducer 19 and the water inlet pipe 13 and is collected by the water collection tank 12. The one-way valve 27 only allows the liquid in the water inlet pipe 13 to flow towards the water collection tank 12, avoiding backflow of water in the water collection tank 12. In addition, the seepage pipe 20 is higher than the water collection tank 12. When there is liquid accumulation in the water collection tank 12 (the lower end of the water inlet pipe 13 is not completely submerged by the liquid), the liquid in the seepage pipe 20 can still be discharged into the water collection tank 12 under the action of gravity. The water collection tank 12 is an integral structure, which can effectively prevent the collected water from seeping into the bottom plate 2.

[0039] During subsequent construction, an outlet for the main pipe 10 can be reserved on the ground floor. The main pipe 10 can be connected to a water pump (not shown). The water pump can be turned on periodically to pump the water in the collection tank 12 out through the main pipe 10, the horizontal pipe 9, and the vertical pipe 8, so as to prevent the liquid accumulated in the collection tank 12 from overflowing. A filter screen can also be installed at the lower end of the vertical pipe 8 to prevent it from being blocked by mud and sand.

Claims

1. A waterproof structure for an underground structural slab and a continuous underground wall, comprising a foundation pit sealing layer (1), characterized in that, A base plate (2) is poured on the foundation pit sealing layer (1), and a wall (3) is set on the base plate (2). A water-stopping component is provided between the base plate (2) and the wall (3). A water-stopping copper sheet (14) is provided at the junction of the base plate (2) and the wall (3). One end of the water-stopping copper sheet (14) is embedded in the base plate (2), and the other end of the water-stopping copper sheet (14) is embedded in the wall (3). A water collection trough (12) is opened on the base plate (2), and the water collection trough (12) is close to the inner wall of the wall (3). A water-guiding component is provided between the water collection trough (12) and the water-stopping component. A fixing component is provided on the inner side of the wall (3). The water-stopping assembly includes a first water-stopping plate (15), a second water-stopping plate (16), and a seepage pipe (20). The first water-stopping plate (15), the second water-stopping plate (16), and the seepage pipe (20) are all located at the junction of the base plate (2) and the wall (3). The first water-stopping plate (15) and the second water-stopping plate (16) are both arc-shaped, and their openings face the seepage pipe (20). The upper part of the seepage pipe (20) is provided with multiple seepage holes (21). The bottom of the wall (3) is fixed with a first support half shell (17), and a hollow support sleeve (23) is provided between the first support half shell (17) and the seepage pipe (20). The bottom plate (2) is fixed with a second support half shell (18), and a sealing layer (24) is provided between the second support half shell (18) and the seepage pipe (20).

2. The waterproof structure for an underground structural base slab and a continuous underground wall according to claim 1, characterized in that, The fixing component includes a horizontal connecting plate (5), and a steel section (4) is fixed between the end of the horizontal connecting plate (5) and the wall (3), and the steel section (4) is embedded in the wall (3). A bracket (6) is fixed between the horizontal connecting plate (5) and the bottom plate (2), and multiple stop sleeves (7) are provided through the horizontal connecting plate (5).

3. The waterproof structure for an underground structural base slab and a continuous underground wall according to claim 2, characterized in that, Multiple suspension buckles (11) are fixedly installed on the inner side wall of the wall (3). The multiple suspension buckles (11) together support the horizontal pipe (9). The bottom of the horizontal pipe (9) is connected to multiple vertical pipes (8), and each vertical pipe (8) passes through the corresponding stop sleeve (7) and extends into the water collection tank (12). The upper part of the horizontal pipe (9) is connected to the main pipe (10).

4. The waterproof structure for an underground structural base slab and a continuous underground wall according to claim 3, characterized in that, The lower end face of the first support half shell (17) is provided with a groove (25), and the upper end face of the second support half shell (18) is integrally formed with a protrusion (26). The specifications of the groove (25) match the specifications of the protrusion (26).

5. A waterproof structure for an underground structural base slab and a continuous underground wall according to claim 4, characterized in that, The water intake assembly includes a water intake pipe (13), one end of which is sealed to the seepage pipe (20) with a reducing adapter (19), the other end of which is connected to the water collection tank (12), and a one-way valve (27) is provided on the water intake pipe (13).

6. The waterproof structure for an underground structural base slab and a continuous underground wall according to claim 1, characterized in that, An arc-shaped transition strip (121) is fixedly installed on the inner bottom wall of the water collection tank (12), and an overlapping edge (122) is fixedly installed on the top of the water collection tank (12). The bottom wall of the water collection tank (12) is inclined downward.

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