Waterproof device for construction joint of super-long tunnel bottom plate

Abstract

The utility model provides an ultra-long tunnel bottom plate construction joint waterproof device which comprises a first geosynthetic clay liner and a second geosynthetic clay liner, the first geosynthetic clay liner is laid between an underground diaphragm wall and a cushion layer, and the second geosynthetic clay liner is laid between the underground diaphragm wall and the cushion layer. The second geosynthetic clay liner is arranged at the top of the first geosynthetic clay liner and located among the underground diaphragm wall, the cushion layer and the foundation slab, and connecting mechanisms are arranged at the bent positions of the first geosynthetic clay liner and the second geosynthetic clay liner. Compared with the prior art, the geosynthetic clay liner has the advantages that through the design of the connecting mechanism, the angle between the supporting plate and the side plate on the connecting mechanism can be adjusted, and therefore the bending angle of the geosynthetic clay liner is matched with the construction angle while the geosynthetic clay liner is supported by the supporting plate and the side plate.

Description

Technical Field

[0001] This utility model is a waterproofing device for construction joints in ultra-long tunnel floor slabs, belonging to the field of tunnel construction. Background Technology

[0002] Tunnels are categorized into railway tunnels, pedestrian tunnels (used as pedestrian walkways to solve the problem of pedestrians and vehicles competing for road space on the ground), canal tunnels, water conveyance tunnels, drainage tunnels, mountain tunnels, urban underground tunnels, underwater tunnels, undersea tunnels, river-crossing tunnels, cable tunnels, and subway tunnels.

[0003] River-crossing tunnels play a vital role in riverside cities, serving as a valuable alternative for cities lacking sufficient bridge sites. Compared to bridges, river-crossing tunnels offer advantages such as minimal disruption to navigation, less relocation, and higher safety. However, the construction of river-crossing tunnels requires addressing the waterproofing issues at the construction joints of the foundation slab. The waterproofing structure must be effective, easy to construct, and structurally stable. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a waterproof device for the construction joint of ultra-long tunnel floor slab.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A waterproofing device for construction joints in ultra-long tunnel floor slabs includes a first bentonite waterproofing blanket and a second bentonite waterproofing blanket. The first bentonite waterproofing blanket is laid between a diaphragm wall and a foundation layer. The second bentonite waterproofing blanket is placed on top of the first bentonite waterproofing blanket and located between the diaphragm wall, the foundation layer, and the foundation slab. Both the first and second bentonite waterproofing blankets have connecting mechanisms at their bends.

[0007] Furthermore, the connecting mechanism includes two support plates, with a support cross plate installed between the two support plates. The support plates are fixed to the mounting surface by fasteners. A side plate is hinged to the side of the support plate. A second movable part is provided on the side of the side plate, and a first movable part is provided on the side of the support plate. The first movable part and the second movable part are connected by a connector.

[0008] Furthermore, the connector includes a plurality of equally spaced connecting holes on the first movable part and a slide rail on the second movable part. The slide rail is adapted to the connecting holes, and the slide rail and the connecting holes are connected and fixed by connecting bolts.

[0009] Furthermore, the second movable component has a U-shaped structure, and the slide rails are provided on both sides of the second movable component. The first movable component is inserted into the second movable component, and the connecting hole is adapted to the slide rails on both sides.

[0010] Furthermore, a positioning plate is inserted on the fastener and located between the mounting surface and the bentonite waterproof blanket.

[0011] Furthermore, the movable component is hinged to the support plate.

[0012] Furthermore, the second movable component is hinged to the side plate.

[0013] Furthermore, the fastener is either a screw or an anchor rod.

[0014] The beneficial effects of this utility model are:

[0015] The design of the connecting mechanism allows for adjustment of the angle between the support plate and the side plate, ensuring that the bending angle of the bentonite waterproofing blanket matches the construction angle while the support plate and side plate are supported by the bentonite waterproofing blanket.

[0016] The design of the connecting hole and the slide allows the two movable parts at different angles, namely movable part one and movable part two, to be connected together. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a waterproofing device for construction joints in ultra-long tunnel floor slabs according to the present invention.

[0019] Figure 2 This is a schematic diagram of the connection structure between the first bentonite waterproofing blanket and the support mechanism of a waterproofing device for construction joints of ultra-long tunnel floor slabs according to this utility model.

[0020] Figure 3 This is a schematic diagram of the connection structure between the second bentonite waterproofing blanket and the support mechanism in a waterproofing device for construction joints of ultra-long tunnel floor slabs according to this utility model. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the connection structure between the second bentonite waterproofing blanket and the support mechanism in a waterproofing device for construction joints of ultra-long tunnel floor slabs according to this utility model. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the support structure of a waterproofing device for construction joints in ultra-long tunnel floor slabs according to this utility model. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the support structure of a waterproofing device for construction joints in ultra-long tunnel floor slabs according to this utility model. Figure 2 .

[0024] In the diagram, 1. Continuous underground wall; 2. Subbase; 3. Foundation slab; 4. First bentonite waterproofing blanket; 5. Second bentonite waterproofing blanket; 6. Support plate; 7. Positioning plate; 8. Fastener; 9. Side plate; 10. Movable part one; 11. Connecting hole; 12. Movable part two; 13. Slide rail; 14. Connecting bolt; 15. Supporting horizontal plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 This utility model provides a technical solution for a waterproofing device for construction joints of ultra-long tunnel floor slabs, including a first bentonite waterproofing blanket 4 and a second bentonite waterproofing blanket 5. The first bentonite waterproofing blanket 4 is laid between the underground continuous wall 1 and the cushion layer 2. The second bentonite waterproofing blanket 5 is set on top of the first bentonite waterproofing blanket 4 and located between the underground continuous wall 1, the cushion layer 2 and the foundation slab 3. Both the first bentonite waterproofing blanket 4 and the second bentonite waterproofing blanket 5 are provided with connecting mechanisms at their bends.

[0027] See Figures 2-6The connecting mechanism includes two support plates 6, with a support cross plate 15 installed between them. The support plates 6 are fixed to the mounting surface by fasteners 8. A side plate 9 is hinged to the side of each support plate 6. A second movable part 12 is provided on the side of each side plate 9, and a first movable part 10 is provided on the side of each support plate 6. The first movable part 10 and the second movable part 12 are connected by a connector. The connector includes several equally spaced connecting holes 11 on the first movable part 10 and slide rails 13 on the second movable part 12. The slide rails 13 are adapted to the connecting holes 11, and the slide rails 13 are connected to the second movable part 12. The holes 11 are connected and fixed by connecting bolts 14. The second movable part 12 has a U-shaped structure. The sliding track 13 is opened on both sides of the second movable part 12. The first movable part 10 is inserted into the second movable part 12. The connecting hole 11 is adapted to the sliding track 13 on both sides. A positioning plate 7 is inserted on the fastener 8 and located between the mounting surface and the bentonite waterproof blanket. Through the design of the connecting mechanism, the angle between the support plate 6 and the side plate 9 on the connecting mechanism can be adjusted, so that while the support plate 6 and the side plate 9 are supported by the bentonite waterproof blanket, the bending angle of the bentonite waterproof blanket matches the construction angle.

[0028] See Figure 6 The first movable part 10 is hinged to the support plate 6, the second movable part 12 is hinged to the side plate 9, and the fastener 8 is either a screw or an anchor rod.

[0029] During the waterproofing treatment of the construction joint, the earthwork is excavated to the finished surface elevation, and then a trench is manually dug near the diaphragm wall 1. An 800mm wide first bentonite waterproofing blanket 4 is pre-embedded close to the diaphragm wall 1 and fixed to the diaphragm wall 1 of the podium building with a connecting mechanism. Before fixing the connecting mechanism, a layer of expansive soil mortar is applied. The plain concrete cushion layer 2 is poured and the first bentonite waterproofing blanket 4 is first turned down and fixed on the cushion layer 2. Then, the second bentonite waterproofing blanket 5 is laid on the cushion layer 2, and after being superimposed with the pre-embedded first bentonite waterproofing blanket 4, it is turned up 100mm high at the diaphragm wall 1 and fixed with a connecting mechanism. The cushion layer 2 is waterproofed, and after the treatment is completed, the reinforcing steel is tied and the bottom slab concrete is poured.

[0030] During the aforementioned construction joint waterproofing process, the angle between the support plate 6 and the side plate 9 on the connecting mechanism can be adjusted, thereby matching the bending angle of the bentonite waterproof blanket with the construction angle. The specific operation process is as follows: First, place the two support plates 6 on both sides of the bentonite waterproof blanket. Then, fix the support plates 6 and the first bentonite waterproof blanket 4 to the side of the installation surface using fasteners 8. Next, install a support cross plate 15 between the two support plates 6. The two support plates 6 and the support cross plate 15 form a support surface, making the bentonite waterproof blanket flush with the installation surface. The components are stably installed together. Then, the angle between the side plate 9 and the support plate 6 is adjusted according to the required angle. Next, the positions of movable part 10 and movable part 2 12 are adjusted so that movable part 10 is located inside the movable part 2 12 of the U-shaped structure. Then, the connecting bolt 14 is inserted into the connecting hole 11 and the slide 13 on both movable part 10 and movable part 2 12, thereby connecting movable part 10 and movable part 2 12 together and limiting the angle between the support plate 6 and the side plate 9, thus ensuring that the connection mechanism is compatible with bentonite waterproof blankets of different angles.

[0031] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waterproofing device for construction joints in ultra-long tunnel floor slabs, characterized in that, It includes a first bentonite waterproof blanket (4) and a second bentonite waterproof blanket (5). The first bentonite waterproof blanket (4) is laid between the underground continuous wall (1) and the cushion layer (2). The second bentonite waterproof blanket (5) is set on top of the first bentonite waterproof blanket (4) and located between the underground continuous wall (1), the cushion layer (2) and the foundation plate (3). Both the first bentonite waterproof blanket (4) and the second bentonite waterproof blanket (5) are provided with connecting mechanisms at their bends.

2. The waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 1, characterized in that, The connecting mechanism includes two support plates (6), and a support cross plate (15) is installed between the two support plates (6). The support plates (6) are fixed to the mounting surface by fasteners (8). A side plate (9) is hinged to the side of the support plate (6). A second movable part (12) is provided on the side of the side plate (9). A first movable part (10) is provided on the side of the support plate (6). The first movable part (10) and the second movable part (12) are connected by a connector.

3. A waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 2, characterized in that, The connector includes several equally spaced connecting holes (11) on the first movable part (10) and slide rails (13) on the second movable part (12). The slide rails (13) are adapted to the connecting holes (11), and the slide rails (13) and the connecting holes (11) are connected and fixed by connecting bolts (14).

4. A waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 3, characterized in that, The second movable component (12) has a U-shaped structure. The slide rails (13) are opened on both sides of the second movable component (12). The first movable component (10) is inserted into the second movable component (12). The connecting hole (11) is adapted to the slide rails (13) on both sides.

5. A waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 4, characterized in that, A positioning plate (7) is inserted on the fastener (8) and between the mounting surface and the bentonite waterproof blanket.

6. A waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 2, characterized in that, The movable component (10) is hinged to the support plate (6).

7. A waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 2, characterized in that, The movable part 2 (12) is hinged to the side plate (9).

8. A waterproofing device for construction joints in ultra-long tunnel floor slabs according to claim 2, characterized in that, The fastener (8) is either a screw or an anchor.

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