Waterproof curtain and construction method thereof

Abstract

The invention relates to the technical field of constructional engineering, in particular to a waterproof curtain and a construction method thereof.The waterproof curtain comprises a plurality of waterproof plates and a plurality of jacking parts, the waterproof plates are sequentially in butt joint to form a wall type waterproof structure, and each waterproof plate comprises at least one rigid supporting layer and at least one waterproof layer which are arranged in the thickness direction of the waterproof plate; the rigid supporting layer and the water-resisting layer are both made of degradable materials. Each jacking piece is of a wedge-shaped structure with the tip facing downwards, the upper ends of the jacking pieces are fixed to the lower ends of the water stop plates in a one-to-one correspondence mode, the water stop plates can be conveniently pressed into the ground through the jacking pieces, the supporting rigidity of the water stop plates is guaranteed through the rigid supporting layers, and the waterproofness of the water stop plates is guaranteed through the water-resisting layers; the rigid supporting layer and the water-resisting layer are both made of degradable materials and can be naturally degraded underground, the water stop plate does not need to be pulled out after the foundation pit is backfilled, and secondary disturbance caused by pulling out the water stop plate to the soil body is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a water-stop curtain and a construction method thereof. Background Art

[0002] The water-stop curtain is a continuous water-stop body used to prevent or reduce the inflow of groundwater from the side walls and bottom of the foundation pit. Traditional foundation pit water-stop curtains generally use mixing piles or toothed steel sheet piles. The construction period of mixing piles or toothed steel sheet pile water-stop curtains is long, and the steel plate needs to be pulled out again after the foundation pit is backfilled, which is easy to cause secondary disturbance to the soil. Summary of the invention

[0003] The technical problem to be solved by the present invention is that: most foundation pits use mixing piles or toothed steel sheet pile water-stop curtains, and the steel plates need to be pulled out after the foundation pit is backfilled, which easily causes secondary disturbance to the soil.

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a water-stop curtain, comprising:

[0005] A plurality of water stop plates, each of which is connected in sequence to form a wall-type water stop structure, each of which comprises at least one rigid support layer and at least one waterproof layer arranged along its thickness direction, and the rigid support layer and the waterproof layer are both made of degradable materials;

[0006] A plurality of pressing members are provided, each of which is a wedge-shaped structure with its tip facing downward, and the upper end of each pressing member is fixed to the lower end of each water stop plate in a one-to-one correspondence.

[0007] As a preferred solution, the rigid support layer is made of biodegradable material, and the waterproof layer is made of nylon resin material.

[0008] As a preferred solution, each of the water stop plates includes two rigid support layers and one waterproof layer, and the waterproof layer is arranged between the two rigid support layers.

[0009] As a preferred solution, the butt ends of two adjacent water stop plates are both provided with water stop mechanisms;

[0010] The water stop mechanism comprises a first groove provided at a butt end of one of the two adjacent water stop plates, and a second groove provided at a butt end of the other of the two adjacent water stop plates, wherein the first groove and the second groove are combined to form a casting cavity;

[0011] The water-stopping mechanism further comprises a water-stopping member cast in the casting cavity.

[0012] As a preferred solution, each of the top pressure members is a wedge-shaped metal shell with its opening facing upward, and the lower end of the rigid support layer of each of the water stop plates extends into the inner cavity of each of the wedge-shaped metal shells and is fixed to each of the wedge-shaped metal shells.

[0013] A construction method of the above-mentioned water-stop curtain comprises the following steps:

[0014] Lay guide rails on both sides or one side of the designed path of the water-stop curtain, and connect the 3D printer guide to the guide rails;

[0015] Placing various top pressure pieces on the designed path of the water-stop curtain;

[0016] The 3D printer is moved along the guide rail to print each waterstop plate on each of the top pressure members; when printing each of the waterstop plates, the same waterstop plate is set into multiple sections along the height direction, and each time a section of the waterstop plate is printed, the solidified section of the waterstop plate is pressed into the ground using a ballast device, and then the next section of the waterstop plate is printed.

[0017] As a preferred solution, it is defined that N water stop plates are sequentially arranged along the design path direction of the water stop curtain, each water stop plate is set to be printed in M ​​segments arranged from bottom to top, P is a natural number less than or equal to N and greater than 1, and Q is a natural number less than or equal to M;

[0018] After printing the Qth section of the P-1th water stop plate, move the 3D printer to the top of the Pth water stop plate and print the Qth section of the Pth water stop plate.

[0019] As a preferred embodiment, after the ballast device presses the Qth section of the P-1th waterstop plate into the ground, it then presses the Qth section of the Pth waterstop plate into the ground.

[0020] As a preferred solution, the ballast device includes an excavator main body and a gravity vibration roller connected to the boom of the excavator.

[0021] As a preferred solution, after the two adjacent waterstop plates are completely pressed into the ground, waterstop components are cast in the casting cavities of the two adjacent waterstop plates.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The water-stop curtain of the present invention comprises a plurality of water-stop plates and a plurality of top pressure pieces, and the water-stop plates are connected in sequence to form a wall-type water-stop structure, and each water-stop plate comprises at least one rigid support layer and at least one waterproof layer arranged along its thickness direction, and the rigid support layer and the waterproof layer are both made of degradable materials; each top pressure piece is a wedge-shaped structure with the tip facing downward, and the upper end of each top pressure piece is fixed one by one to the lower end of each water-stop plate, and the arrangement of the top pressure pieces facilitates pressing the water-stop plates into the ground, and the arrangement of the rigid support layer ensures the supporting stiffness of the water-stop plate, and the waterproof layer ensures the waterproof property of the water-stop plate, and the rigid support layer and the waterproof layer are both made of degradable materials and can be naturally degraded underground, and there is no need to pull out the water-stop plates after backfilling the foundation pit, thereby avoiding secondary disturbance of the soil caused by pulling out the water-stop plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A top view of the water stop plate;

[0025] Figure 2 for Figure 1 Middle BB section view;

[0026] Figure 3 for Figure 1 Middle AA section view;

[0027] Figure 4 This is the axonometric view of the water stop plate;

[0028] Figure 5 It is a structural schematic diagram of the joint part of two water stop plates;

[0029] Figure 6 It is a schematic diagram of the structure after two water stop plates are joined;

[0030] Figure 7 A top view of the water stop;

[0031] Figure 8 This is an exploded view of the water stop plate;

[0032] Fig. 9 The figure is a schematic diagram of the installation structure of the top pressure piece and the guide rail;

[0033] Fig.10 This is a schematic diagram of the structure of the water-stop curtain;

[0034] Fig.11 Schematic diagram of the location after the water-stop curtain construction is completed;

[0035] In the figure, 1. water stop plate, 11. rigid support layer, 12. waterproof layer, 2. top pressure piece, 21. wedge-shaped metal shell, 22. pre-printed tough core, 31. first groove, 32. second groove, 33. casting cavity, 34. water stop piece, 35. convex rib, 4. wall type water stop structure, 100. guide rail, 200. 3D printer, 201. biodegradable resin printing port, 202. nylon resin printing port, 300. ballast device, 301. excavator mainframe, 302. gravity vibration roller, 400. existing building, 500. groundwater level, 600. impermeable layer, 700. shallow foundation pit. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0038] like Figures 1 to 10 As shown, a preferred embodiment of the water-stop curtain of the present invention comprises a plurality of water-stop plates 1 and a plurality of top pressure members 2, each water-stop plate 1 is connected in sequence to form a wall-type water-stop structure 4, each water-stop plate 1 comprises at least one rigid support layer 11 and at least one waterproof layer 12 arranged along its thickness direction, and both the rigid support layer 11 and the waterproof layer 12 are made of degradable materials; each top pressure member 2 is a wedge-shaped structure with the tip facing downward, and the upper end of each top pressure member 2 is fixed one by one to the lower end of each water-stop plate 1, and the arrangement of the top pressure members 2 facilitates pressing the water-stop plate 1 into the ground, the arrangement of the rigid support layer 11 ensures the supporting stiffness of the water-stop plate 1, and the waterproof layer 12 ensures the waterproofness of the water-stop plate 1, and both the rigid support layer 11 and the waterproof layer 12 are made of degradable materials, which can be naturally degraded underground, and there is no need to pull out the water-stop plate 1 after the foundation pit is backfilled, thereby avoiding the secondary disturbance of the soil caused by pulling out the water-stop plate 1.

[0039] In this embodiment, the rigid support layer 11 is made of biodegradable material, and the waterproof layer 12 is made of nylon resin material. Among them, the rigid support layer 11 is made of biodegradable material, and the waterproof layer 12 is made of nylon resin material, such as polyglycolic acid resin. Nylon resin material can be naturally degraded underground, but the degradation cycle is long, generally requiring more than five years. The rigid support layer 11 made of biodegradable material has high rigidity, but a short degradation cycle, generally degrading in about three months. The rigid support layer 11 mainly plays the role of driving the waterproof layer 12 to be pressed into the ground. Therefore, even if the building in the foundation pit has not been completed before the rigid support layer 11 degrades, the waterproof layer 12 is still working normally, thereby ensuring the normal operation of the water-stop curtain. That is, in this embodiment, the rigidity of the biodegradable resin and the waterproof type of the nylon resin and the long-term degradation characteristics of the nylon resin are cleverly combined to achieve the water-stop plate 1. While being able to naturally degrade underground, it is ensured that the water-stop plate 1 can be smoothly placed underground.

[0040] In order to improve the rigidity of the waterstop plate 1, in this embodiment, each waterstop plate 1 includes two rigid support layers 11 and a waterproof layer 12, and the waterproof layer 12 is arranged between the two rigid support layers 11. Specifically, the first rigid support layer 11, the waterproof layer 12 and the second rigid support layer 11 are arranged in sequence along the thickness direction of the waterstop plate 1. Rigid support layers 11 are provided on both sides of the waterproof layer 12 to ensure the overall support strength of the waterstop plate 1. Both rigid support layers 11 are made of biodegradable resin. In order to reduce the construction cost of the waterstop plate 1 and ensure the rigidity of the waterstop plate 1, in this embodiment, both rigid support layers 11 adopt a honeycomb structure, which has a low density and high compressive strength. The waterstop curtain often needs to be flexibly adjusted according to the geographical conditions of the construction site. In this embodiment, in order to facilitate the construction of the waterstop curtain, each waterstop plate 1 is made of 3D printing.

[0041] In order to ensure the waterproofness of the joint between two adjacent waterstop plates 1, in this embodiment, the joint ends of the two adjacent waterstop plates 1 are provided with a waterstop mechanism; the waterstop mechanism includes a first groove 31 provided at the joint end of one of the two adjacent waterstop plates 1, and a second groove 32 provided at the joint end of the other of the two adjacent waterstop plates 1, the first groove 31 and the second groove 32 are matched to form a casting cavity 33, and the waterstop mechanism also includes a waterstop member 34 cast in the casting cavity 33. The waterstop member 34 is cast after the two adjacent waterstop plates 1 are pressed below the ground, and the waterstop member 34 covers the joint between the two adjacent waterstop plates 1 from top to bottom, and the two ends of the waterstop member 34 extend into the first groove 31 and the second groove 32 respectively, thereby ensuring waterproofness.

[0042] In this embodiment, the material used for the water stop member 34 is epoxy resin, which has a small shrinkage rate, ensuring that the water stop member 34 fits tightly with the cavity wall of the casting cavity 33 , further improving the sealing effect of the water stop member 34 .

[0043] The groove walls of the first groove 31 and the second groove 32 are both provided with a plurality of ribs 35 arranged at intervals in the horizontal direction. Specifically, the length directions of the plurality of ribs 35 are arranged vertically, and when the soil near the water stop plate 1 moves slightly, each rib 35 will fit tightly with the water stop member 34. The arrangement of the ribs 35 can further improve the sealing effect between the water stop member 34 and the cavity wall of the casting cavity 33, and improve the connection strength between two adjacent water stop plates 1.

[0044] In this embodiment, each top pressure member 2 is a wedge-shaped metal shell 21 with an opening facing upward, and the lower end of the rigid support layer 11 of each water stop plate 1 extends into the inner cavity of each wedge-shaped metal shell 21 and is fixed to each wedge-shaped metal shell 21. The setting of the wedge-shaped metal shell 21 makes the lower end of the water stop plate 1 have a pointed tip and the pressure bearing strength of the pointed tip is high, ensuring that the water stop plate 1 can be smoothly pressed below the ground.

[0045] Furthermore, in this embodiment, the top pressure member 2 also includes a pre-printed tough core 22 pre-printed in the wedge-shaped metal shell 21. The pre-printed tough core 22 uses the same material as the rigid support layer 11. The upper end of the pre-printed tough core 22 is provided with a docking groove opening upward. After the top pressure member 2 is pressed below the ground, the water stop plate 1 is printed in the docking groove and the upper end of the pre-printed tough core 22.

[0046] A preferred embodiment of the construction method of the above-mentioned water-stop curtain comprises the following steps:

[0047] Guide rails 100 are laid on both sides or one side of the designed path of the water-stop curtain, and the 3D printer 200 is guided and connected to the guide rails 100; in this embodiment, in order to ensure the fixation and stability of the 3D printer 200, two guide rails 100 are provided, and the two guide rails 100 are symmetrically arranged on both sides of the designed path of the water-stop curtain; in this embodiment, the 3D printer 200 is provided with a biodegradable resin printing port 201 and a nylon resin printing port 202, which are used to print the rigid support layer 11 and the waterproof layer 12 respectively;

[0048] Before 3D printing the water stop 34, it is necessary to place each top pressure piece 2 on the design path of the water stop curtain; in this embodiment, the top pressure piece 2 is pre-pressed in the ground. Then, the 3D printer 200 is moved along the guide rail 100 to print each water stop plate 1 on each top pressure piece 2; when printing each water stop plate 1, the same water stop plate 1 is set into multiple sections in the height direction. After each section of the water stop plate 1 is printed, the solidified section of the water stop plate 1 is pressed into the ground by the ballast device 300, and then the next section of the water stop plate 1 is printed. Printing each water stop plate 1 section by section can press the water stop plate 1 downward when the upper end of the water stop plate 1 protrudes to a small height above the ground. Printing a section and pressing down a section avoids the situation where the water stop plate 1 is bent when it is subjected to the impact load of the ballast device 300 because the height of the water stop plate 1 protruding above the ground is too high after the entire water stop plate 1 is printed at a time.

[0049] In this embodiment, it is defined that N waterstop plates 1 are sequentially arranged along the design path direction of the waterstop curtain, each waterstop plate 1 is set to be printed in M ​​segments arranged from bottom to top, P is a natural number less than or equal to N and greater than 1, and Q is a natural number less than or equal to M; after printing the Qth segment of the P-1th waterstop plate 1, the 3D printer 200 is moved to the top of the Pth waterstop plate 1, and the Qth segment of the Pth waterstop plate 1 is printed. For example, after printing the first segment of the first waterstop plate 1, the 3D printer 200 is moved forward to start printing the first segment of the second waterstop plate 1, that is, the printing order of the 3D printer 200 is: the first segment of the first waterstop plate 1, the first segment of the second waterstop plate 1, until the first segment of the Nth waterstop plate 1, then start printing the second segment of the first waterstop plate 1 until the second segment of the Nth waterstop plate 1, and repeat until the Mth segment of the Nth waterstop plate 1 is printed.

[0050] In this embodiment, after the ballast device 300 presses the Qth section of the P-1th waterstop plate 1 into the ground, it then presses the Qth section of the Pth waterstop plate 1 into the ground. Specifically, the order in which the ballast device 300 ballasts each waterstop plate 1 is: the first section of the first waterstop plate 1, the first section of the second waterstop plate 1, until the first section of the Nth waterstop plate 1, and then starts printing the second section of the first waterstop plate 1 until the second section of the Nth waterstop plate 1, and repeats this cycle until the Mth section of the Nth waterstop plate 1 is printed. Ballasting each waterstop section in this way not only facilitates the movement of the ballast device 300 and avoids ineffective movement, but also enables a large height difference between two adjacent waterstop plates 1 during the construction process, thereby avoiding soil from entering the first groove 31 and the second groove 32 when ballasting the waterstop plate 1.

[0051] In this embodiment, the length of each water stop plate 1 is about 3 meters to 5 meters, and the printing height of each section is 1.5 meters. Each section of water stop plate 1 can be cured in about 30 minutes after printing. After curing, it can be pressed into the ground using the ballast device 300.

[0052] After the two adjacent water stop plates 1 are completely pressed into the ground, water stop parts 34 are cast in the casting cavities 33 of the two adjacent water stop plates 1. This strengthens the integrity and waterproofness of the curtain, and the overall construction of the water stop curtain is completed.

[0053] In this embodiment, the ballast device 300 includes an excavator main body 301 with a bucket removed and a gravity vibration roller 302 installed at the end of the excavator boom. The movement of the excavator main body 301 is used to drive the gravity vibration roller 302 to roll, thereby pressurizing each water stop plate 1. By operating the boom to move horizontally, the position of the gravity vibration roller 302 can be adjusted. By operating the boom to move up and down, the height of the gravity vibration roller 302 can be changed, thereby flexibly moving the gravity vibration roller 302 to the upper end of each water stop plate 1 at different heights.

[0054] like Fig.11 After the construction of the water-stop curtain is completed, the wall-type water-stop structure 4 is located between the shallow foundation pit 700 and the existing building 400, the lower end of the water-stop plate 1 extends below the impermeable layer 600, and the upper end of the water-stop plate 1 is located above the groundwater level 500. The water-stop curtain in this embodiment is mainly used for clay layers rich in groundwater or other types of soft foundations, and has a good water interception effect on the shallow foundation pit 700.

[0055] In summary, the preferred embodiment of the water-stop curtain of the present invention comprises a plurality of water-stop plates 1 and a plurality of top pressure members 2, each water-stop plate 1 is connected in sequence to form a wall-type water-stop structure 4, each water-stop plate 1 comprises at least one rigid support layer 11 and at least one waterproof layer 12 arranged along its thickness direction, and the rigid support layer 11 and the waterproof layer 12 are both made of degradable materials; each top pressure member 2 is a wedge-shaped structure with the tip facing downward, and the upper end of each top pressure member 2 is fixed one by one to the lower end of each water-stop plate 1, and the arrangement of the top pressure members 2 facilitates pressing the water-stop plate 1 into the ground, the arrangement of the rigid support layer 11 ensures the supporting stiffness of the water-stop plate 1, and the waterproof layer 12 ensures the waterproofness of the water-stop plate 1, and the rigid support layer 11 and the waterproof layer 12 are both made of degradable materials and can be naturally degraded underground. There is no need to pull out the water-stop plate 1 after the foundation pit is backfilled, thereby avoiding the secondary disturbance of the soil caused by pulling out the water-stop plate 1.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A water-stop curtain, characterized in that: include: A plurality of water stop plates (1), each of the water stop plates (1) being connected in sequence to form a wall-type water stop structure (4), each of the water stop plates (1) comprising at least one rigid support layer (11) and at least one waterproof layer (12) arranged along its thickness direction, the rigid support layer (11) and the waterproof layer (12) being made of degradable materials; A plurality of pressing members (2) are provided, each of the pressing members (2) being a wedge-shaped structure with the tip facing downward, and the upper end of each pressing member (2) being fixed to the lower end of each water stop plate (1) in a one-to-one correspondence.

2. The water-stop curtain according to claim 1, characterized in that: The rigid support layer (11) is made of biodegradable material, and the waterproof layer (12) is made of nylon resin material.

3. The water-stop curtain according to claim 1, characterized in that: Each of the water stop plates (1) comprises two rigid support layers (11) and a waterproof layer (12), wherein the waterproof layer (12) is arranged between the two rigid support layers (11).

4. The water-stop curtain according to claim 1, characterized in that: The butt ends of two adjacent water stop plates (1) are both provided with water stop mechanisms; The water stop mechanism comprises a first groove (31) provided at the butt end of one of the two adjacent water stop plates (1), and a second groove (32) provided at the butt end of the other of the two adjacent water stop plates (1), wherein the first groove (31) and the second groove (32) are combined to form a casting cavity (33); The water-stopping mechanism further comprises a water-stopping member (34) cast in the casting cavity (33).

5. The water-stop curtain according to claim 1, characterized in that: Each of the pressing members (2) is a wedge-shaped metal shell (21) with its opening facing upward, and the lower end of the rigid support layer (11) of each of the water stop plates (1) extends into the inner cavity of each of the wedge-shaped metal shells (21) and is fixed to each of the wedge-shaped metal shells (21).

6. A construction method for a water-stop curtain according to any one of claims 1 to 5, characterized in that: The following steps are involved: Laying guide rails (100) on both sides or one side of the designed path of the water-stop curtain, and guiding and connecting the 3D printer (200) to the guide rails (100); Placing each pressing member (2) on the designed path of the water-stop curtain; The 3D printer (200) is moved along the guide rail (100) to print each water stop plate (1) on each of the top pressure members (2); when printing each of the water stop plates (1), the same water stop plate (1) is set into multiple sections along the height direction, and each time a section of the water stop plate (1) is printed, the solidified section of the water stop plate (1) is pressed into the ground using a ballast device (300), and then the next section of the water stop plate (1) is printed.

7. The construction method of the water-stop curtain according to claim 6, characterized in that: It is defined that N water stop plates (1) are sequentially arranged along the design path direction of the water stop curtain, each of the water stop plates (1) is set to be printed in M ​​segments arranged from bottom to top, P is a natural number less than or equal to N and greater than 1, and Q is a natural number less than or equal to M; After printing the Qth section of the P-1th water stop plate (1), move the 3D printer (200) to the top of the Pth water stop plate (1) and print the Qth section of the Pth water stop plate (1).

8. The construction method of the water-stop curtain according to claim 7, characterized in that: After the ballast device (300) presses the Qth section of the P-1th water stop plate (1) into the ground, it then presses the Qth section of the Pth water stop plate (1) into the ground.

9. The construction method of the water-stop curtain according to claim 6, characterized in that: The ballast device (300) comprises an excavator main body (301) and a gravity vibration roller (302) connected to the boom of the excavator.

10. The construction method of the water-stop curtain according to claim 6, characterized in that: After the two adjacent water stop plates (1) are completely pressed into the ground, water stop parts (34) are cast in the casting cavities (33) of the two adjacent water stop plates (1).

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