Shield tunnel portal sealing and water stopping device suitable for water-rich soft stratum

Abstract

The utility model relates to the technical field of shield tunnel portal sealing and water stopping, and discloses a shield tunnel portal sealing and water stopping device suitable for a water-rich soft stratum, which comprises a pre-embedded steel ring and an extension steel ring fixed with the pre-embedded steel ring, the two ends of the extending steel ring are connected with a first curtain cloth rubber sealing plate and a second curtain cloth rubber sealing plate respectively, folding pressing plates are installed on the first curtain cloth rubber sealing plate and the second curtain cloth rubber sealing plate, and elastic steel sheets are further arranged between the first curtain cloth sealing plate and the folding pressing plates and between the second curtain cloth sealing plate and the folding pressing plates. The lower end of the elastic steel sheet protrudes out of the first cord fabric rubber sealing plate and the second cord fabric rubber sealing plate. The shield sealing device solves the problem that a cord fabric rubber plate of a traditional shield sealing device is prone to turning over in a water-rich soft stratum, so that the sealing and water stopping effect is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunnel portal sealing and water-stopping technology, specifically relating to a shield tunnel portal sealing and water-stopping device suitable for water-rich and soft strata. Background Technology

[0002] Traditional shield tunnel portal sealing devices consist of a fabric rubber sealing plate and a hinged pressure plate. During the advance of the shield machine, the hinged pressure plate supports the fabric rubber sealing plate, ensuring that the fabric rubber sealing plate is tightly attached to the surface of the shield machine to achieve a sealing effect.

[0003] Currently, the sealing method using only one cord rubber sealing plate has limited sealing effect. In water-rich and soft strata, leakage of water and grout is likely to occur. At the same time, the cord rubber sealing plate does not fit tightly to the shield machine shell, and it is easy to overturn in water-rich and soft strata, which greatly reduces the sealing and water-stopping effect and brings great safety hazards to the shield machine's operation.

[0004] Therefore, it is particularly important to develop a sealing and water-stopping device for tunnel entrances in water-rich and soft strata, so that it can achieve a good sealing and water-stopping effect under the conditions of water-rich and soft strata. Utility Model Content

[0005] The purpose of this utility model is to provide a shield tunnel portal sealing and water-stopping device suitable for water-rich and soft strata, solving the problem that the curtain rubber sealing plate of the traditional shield tunnel portal sealing device is prone to overturning in water-rich and soft strata, resulting in a significant reduction in the sealing and water-stopping effect.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A sealing and water-stopping device for shield tunnel portals in water-rich and soft strata includes a pre-embedded steel ring and an extended steel ring fixed to the pre-embedded steel ring.

[0008] The two ends of the extension steel ring are respectively connected to a first curtain rubber sealing plate and a second curtain rubber sealing plate, and a hinge pressure plate is installed on both the first curtain rubber sealing plate and the second curtain rubber sealing plate.

[0009] The folding pressure plate includes an annular connecting part and multiple folding parts. The connecting part is coaxially mounted on the first and second curtain rubber sealing plates with the extension steel ring through the cooperation of a fixing nut and a threaded screw. The multiple folding parts are rotatably connected to the inner ring of the connecting part through pins. The multiple folding parts are evenly distributed along the circumference of the connecting part, and the end of the folding part away from the connecting part points to the axis of the connecting part. Elastic steel sheets are provided between the first curtain rubber sealing plate and the folding parts, and between the second curtain rubber sealing plate and the folding parts. The end of the elastic steel sheet away from the connecting part protrudes from the inner edge of the first and second curtain rubber sealing plates.

[0010] Furthermore, the inner wall of the embedded steel ring and the inner wall of the extended steel ring are respectively provided with a first mounting base and a second mounting base. A third mounting base is provided on the lower part of the first curtain rubber sealing plate facing the embedded steel ring, and a fourth mounting base is provided on the lower part of the second curtain rubber sealing plate facing the embedded steel ring. Connecting bolts are installed on the first mounting base, the second mounting base, the third mounting base and the fourth mounting base. The first mounting base and the third mounting base are connected by an anti-bending spring, and the two ends of the anti-bending spring are fixed by connecting bolts.

[0011] The second mounting base and the fourth mounting base are connected by an anti-bending spring, and the two ends of the anti-bending spring are fixed by connecting bolts.

[0012] Furthermore, the inner wall of the pre-embedded steel ring is provided with a shield sealing brush.

[0013] Furthermore, high-density sponge supports are provided on both sides of the shield sealing brush.

[0014] In summary, by adopting the above technical solution, this utility model has the following advantages and beneficial effects compared with the prior art:

[0015] The shield tunnel portal sealing and water-stopping device is equipped with two layers of fabric rubber sealing plates, which effectively improves the overall sealing and water-stopping effect. Simultaneously, elastic steel sheets are installed between the first fabric rubber sealing plate and the hinge plate, and between the second fabric rubber sealing plate and the hinge plate. The end of the elastic steel sheet facing the center of the portal protrudes outward from the inner edge of the first fabric rubber sealing plate and the second fabric rubber sealing plate. When the tunnel boring machine (TBM) enters, it forces the first fabric rubber sealing plate, the elastic steel sheet, and the hinge plate to bend. The portion of the elastic steel sheet protruding from the fabric rubber sealing plate protects the inner edge of the first fabric rubber sealing plate, preventing direct contact between the TBM cutterhead and the fabric rubber sealing plate, thus preventing damage. At the same time, the end of the elastic steel sheet bending towards the center of the portal, below the first fabric rubber sealing plate, provides support, preventing the first fabric rubber sealing plate from flipping under strong water pressure and losing its sealing effect. Furthermore, the elastic steel sheet, by utilizing its elasticity, tightly adheres to the outer shell of the tunnel boring machine, greatly enhancing the device's sealing and water-stopping capabilities. This effectively solves the problem that the traditional shield sealing device's curtain rubber sealing plate is prone to overturning in water-rich and soft strata, resulting in a significant reduction in the sealing and water-stopping effect.

[0016] Furthermore, the function and effect of the second fabric rubber sealing plate are the same as those of the first fabric rubber sealing plate, which can further improve the sealing and water-stopping effect. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the initial state of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the tunnel boring machine after it enters the tunnel;

[0019] Figure 3 This is an enlarged schematic diagram of point A of this utility model;

[0020] Figure 4 This is an enlarged schematic diagram of section B of the present invention;

[0021] Markings in the diagram: 1-Embedded steel ring, 2-Extended steel ring, 3-First curtain rubber sealing plate, 4-Second curtain rubber sealing plate, 5-Folding pressure plate, 51-Connecting part, 52-Folding part, 53-Pin shaft, 6-Fixing nut, 7-Threaded screw, 8-Elastic steel sheet, 9-First mounting base, 10-Second mounting base, 11-Third mounting base, 12-Fourth mounting base, 13-Connecting bolt, 14-Bending spring, 15-Shield sealing brush, 16-High-density sponge support, 17-Grease injection hole, 18-Shield machine. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so as to provide a better understanding of the concept of the present utility model, the technical problem solved, the technical features constituting the technical solution and the technical effects brought about.

[0023] As per the instruction manual Figure 1 -Instruction manual included Figure 4 As shown, a shield tunnel portal sealing and water-stopping device suitable for water-rich and soft strata includes a pre-embedded steel ring 1 and an extended steel ring 2 fixed to the pre-embedded steel ring 1.

[0024] The first curtain rubber sealing plate 3 and the second curtain rubber sealing plate 4 are respectively connected to the two ends of the extension steel ring 2. Folding pressure plate 5 is installed on both the first curtain rubber sealing plate 3 and the second curtain rubber sealing plate 4.

[0025] The folding pressure plate 5 includes an annular connecting part 51 and multiple folding parts 52. The connecting part 51 is coaxially arranged on the first curtain rubber sealing plate 3 and the second curtain rubber sealing plate 4 with the extension steel ring 2 through the cooperation of the fixing nut 6 and the threaded screw 7. The multiple folding parts 52 are rotatably connected to the inner ring of the connecting part 51 through the pin 53. The multiple folding parts 52 are evenly distributed along the circumference of the connecting part 51, and the end of the folding part 52 away from the connecting part 51 points to the axis of the connecting part 51. Elastic steel sheets 8 are provided between the first curtain rubber sealing plate 3 and the folding parts 52 and between the second curtain rubber sealing plate 4 and the folding parts 52. The end of the elastic steel sheet 8 away from the connecting part 51 protrudes from the inner edge of the first curtain rubber sealing plate 3 and the inner edge of the second curtain rubber sealing plate 4.

[0026] In the implementation of this utility model, two curtain rubber sealing plates are set for sealing, which improves the overall sealing and water-stopping effect of the device.

[0027] When the tunnel boring machine 18 enters, it forces the first rubber sealing plate 3, the elastic steel sheet 8, and the hinge plate 5 to bend. The portion of the elastic steel sheet 8 protruding from the first rubber sealing plate 3 protects its inner edge, preventing direct contact between the tunnel boring machine cutterhead 9 and the first rubber sealing plate, thus preventing damage. Simultaneously, the bent end of the elastic steel sheet 8 provides support below the first rubber sealing plate 3, preventing it from flipping under high water pressure and losing its sealing effect. Furthermore, the elastic steel sheet 8, with its elasticity, adheres tightly to the outer shell of the tunnel boring machine 18, greatly enhancing the device's sealing and water-stopping capabilities.

[0028] The function and effect of the second fabric rubber sealing plate 4 mentioned above are the same as those of the first fabric rubber sealing plate 3, which can further improve the sealing and water-stopping effect.

[0029] The lower end of the elastic steel sheet 8 extends slightly beyond the first fabric rubber sealing plate 3 and the second fabric rubber sealing plate 4, preferably with a length of 3-5cm.

[0030] In a preferred embodiment, a first mounting base 9 and a second mounting base 10 are respectively provided on the lower inner wall of the pre-embedded steel ring 1 and the lower inner wall of the extended steel ring 2. A third mounting base 11 is provided on the lower part of the first fabric rubber sealing plate 3 near the pre-embedded steel ring 1, and a fourth mounting base 12 is provided on the lower part of the second fabric rubber sealing plate 4 near the pre-embedded steel ring 1. Connecting bolts 13 are installed on the first mounting base 9, the second mounting base 10, the third mounting base 11, and the fourth mounting base 12. The connecting bolts 13 on the first mounting base 9 and the connecting bolts 13 on the third mounting base 11 are connected by an anti-bending spring 14, and the connecting bolts 13 on the second mounting base 10 and the connecting bolts 13 on the fourth mounting base 12 are connected by an anti-bending spring 14.

[0031] In this embodiment, the anti-bending spring 14 is in a stretched state when the tunnel boring machine 18 has not entered. When the tunnel boring machine 18 enters, the tunnel boring machine 18 forces the first curtain rubber sealing plate 3, the elastic steel sheet 8, and the hinge pressure plate 5 to bend, which drives the anti-bending spring 14 to compress. The anti-bending spring 14 generates a reaction force to press the first curtain rubber sealing plate 3 tightly, so that the first curtain rubber sealing plate 3 and the elastic steel sheet 8 are in close contact with the outer shell of the tunnel boring machine 9, thereby improving the sealing effect.

[0032] As the tunnel boring machine 18 continues to advance, it forces the second curtain rubber sealing plate 4, the elastic steel sheet 8, and the hinge pressure plate 5 to bend, which in turn compresses the anti-bending spring 14. The anti-bending spring 14 generates a reaction force to press the second curtain rubber sealing plate 4 tightly, so that the second curtain rubber sealing plate 4 and the elastic steel sheet 8 are in close contact with the outer shell of the tunnel boring machine 9. The first curtain rubber sealing plate 3 and the second curtain rubber sealing plate 4 can further improve the sealing effect of the device.

[0033] In a preferred embodiment, a shield sealing brush 15 is installed on the pre-embedded steel ring 1.

[0034] In this embodiment, the shield sealing brush 15 is used to prevent soil, sand, mud and other substances from seeping into the shield machine 18, and works in conjunction with the curtain rubber sealing plate to improve the sealing effect.

[0035] In a preferred embodiment, the shield sealing brush 15 is located on the inner wall of the pre-embedded steel ring 1, and high-density sponge supports 16 are provided on both sides of the shield sealing brush 15.

[0036] In this embodiment, the high-density sponge support 16 can provide rebound force when the shield sealing brush 15 is in close contact with the shield machine 18, thus improving its sealing performance. At the same time, it can also filter and stop water, absorb leakage water and some fine sand and gravel, and adhere to both sides of the shield sealing brush 15 to protect and support the shield sealing brush 15 and prevent the shield machine 18 cutterhead from cutting the shield sealing brush 15.

[0037] The terms "connection" and "fixing" appearing in this utility model description can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this utility model should be understood according to the specific circumstances.

[0038] In the description of this utility model, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used only to indicate the orientation or positional relationship for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A shield tunnel portal sealing water stop device suitable for water-rich soft ground, characterized in that, The embedded steel ring (1) and the extension steel ring (2) fixed with the embedded steel ring (1) are included. The first and second cord rubber sealing plates (3) and (4) are respectively connected with the two ends of the extension steel ring (2), and the folding pressing plates (5) are installed on the first and second cord rubber sealing plates (3) and (4). The folding pressing plate (5) includes a connecting part (51) in the shape of a ring and a plurality of folding parts (52). The connecting part (51) is coaxially arranged on the first and second cord rubber sealing plates (3) and (4) through the cooperation of the fixed nut (6) and the pair of screw rods (7). The plurality of folding parts (52) are rotatably connected with the inner ring of the connecting part (51) through the pin shaft (53). The plurality of folding parts (52) are uniformly distributed along the circumference of the connecting part (51), and the end of the folding part (52) away from the connecting part (51) points to the axis of the connecting part (51). The elastic steel sheets (8) are arranged between the first cord rubber sealing plate (3) and the folding part (52) and between the second cord rubber sealing plate (4) and the folding part (52). The end of the elastic steel sheet (8) away from the connecting part (51) protrudes from the inner edge of the first cord rubber sealing plate (3) and the inner edge of the second cord rubber sealing plate (4).

2. A shield tunnel portal sealing and water-stopping device suitable for water-rich soft ground according to claim 1, characterized in that, The inner wall of the embedded steel ring (1) and the inner wall of the extension steel ring (2) are respectively provided with the first and second installation bases (9) and (10). The lower part of the first cord rubber sealing plate (3) on the side facing the embedded steel ring (1) is provided with the third installation base (11), and the lower part of the second cord rubber sealing plate (4) on the side facing the embedded steel ring (1) is provided with the fourth installation base (12). The first, second, third, and fourth installation bases (9), (10), (11), and (12) are all installed with the connecting bolts (13). The first installation base (9) and the third installation base (11) are connected through the bending-resistant spring (14), and the two ends of the bending-resistant spring (14) are fixed through the connecting bolts (13). The second installation base (10) and the fourth installation base (12) are connected through the bending-resistant spring (14), and the two ends of the bending-resistant spring (14) are fixed through the connecting bolts (13).

3. A shield tunnel portal sealing and water-stopping device suitable for water-rich soft ground according to claim 1, characterized in that, The inner side wall of the embedded steel ring (1) is provided with the shield sealing brush (15).

4. A shield tunnel portal sealing and water-stopping device suitable for water-rich soft ground according to claim 3, characterized in that, The high-density sponge supports (16) are arranged on the two sides of the shield sealing brush (15).

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