Shield tail structure capable of preventing water from penetrating into water-rich stratum of sea-crossing section

Abstract

The utility model relates to a shield technology field, concretely is a kind of shield tail structure of water-permeable prevention of water-permeable of water-rich stratum in sea area section, the inside of the casing is provided with grouting pipe, the inner wall of the casing is fixedly connected with shield tail brush, the inner wall of the casing is provided with sealing ring, the both sides of the sealing ring are fixedly connected with connecting ring, the bottom of the connecting ring is fixedly connected with positioning column.The utility model reaches the firm performance of the insertion of positioning column and positioning groove under the abutment contact of rubber ring and the inner wall of positioning groove, is connected through positioning groove and abutment plate, is completed the fixed support operation of sealing ring on the inner wall of casing under the abutment contact of abutment plate and the surface of positioning column, improves its anti-seepage function and effect by the cooperation of sealing ring and shield tail brush, realizes the support control effect of the installation position of sealing ring in casing through the abutment contact of pressing plate and connecting ring, and it is convenient to carry out dismounting replacement operation.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, specifically a shield tail structure for preventing water seepage in water-rich strata when crossing sea areas. Background Technology

[0002] When a tunnel boring machine (TBM) passes through water-rich strata in the sea area, grouting is injected at the tail of the shield to prevent water from seeping into the tunnel. However, existing tail structures usually use a combination of grouting and tail brushes to achieve the anti-seepage operation. But the soil in water-rich strata is soft and fluid. While waiting for the grout to solidify, the mud flows, which cannot be controlled by the tail brush and grease alone, and water can easily seep in. Utility Model Content

[0003] The purpose of this utility model is to provide a shield tail structure for preventing water seepage in water-rich strata crossing the sea, in order to solve the problem mentioned in the background art that the soil in water-rich strata is loose and fluid, and that the mud flows while waiting for the grout to solidify, which cannot be controlled by the shield tail brush and grease alone, and is prone to water seepage.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a shield tail structure for waterproofing and preventing seepage in water-rich strata during sea crossings, comprising a casing, an injection pipe inside the casing, a shield tail brush fixedly connected to the inner wall of the casing, a sealing ring on the inner wall of the casing, connecting rings fixedly connected to both sides of the sealing ring, a positioning post fixedly connected to the bottom end of the connecting ring, a rubber ring sleeved on the outer surface of the positioning post, a positioning groove on the inner wall of the casing, a stop plate on the inner wall of the positioning groove, a support frame fixedly connected to the inner wall of the casing, a pressure plate penetrating through the inside of the support frame, sliding plates fixedly connected to both sides of the pressure plate, a telescopic spring fixedly connected to the surface of the sliding plates, and a lever plate fixedly connected to the outer surface of the pressure plate.

[0005] Preferably, the grouting pipes are evenly distributed on the surface of the casing, and the shield tail brushes are evenly distributed on the inner wall of the casing.

[0006] Preferably, the sealing ring is hollow inside, the positioning post and the positioning groove are inserted into each other, and the rubber ring abuts against the inner wall of the positioning post and the positioning groove.

[0007] Preferably, the abutment plates are evenly distributed on the inner wall of the positioning groove, and the abutment plates are in contact with the outer surface of the positioning post through the positioning groove.

[0008] Preferably, the inner wall of the support frame is provided with an elongated groove, the slide plate is slidably connected to the elongated groove, and the pressure plate is elastically slidably connected to the support frame through a telescopic spring.

[0009] Preferably, the pressure plate is pressed together by a support frame and a connecting ring, the support frame is evenly distributed on both sides of the sealing ring, and the positions of the support frames distributed on both sides of the sealing ring are staggered.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. Through the connection between the housing and the sealing ring, and the connection between the sealing ring and the connecting ring, the positioning post and the positioning groove are inserted to achieve the supporting and limiting effect of the sealing ring on the inner wall of the housing. Under the abutting contact between the rubber ring and the inner wall of the positioning groove, the positioning post and the positioning groove are firmly inserted. Through the connection between the positioning groove and the abutment plate, and the abutment contact between the surface of the abutment plate and the positioning post, the sealing ring is fixed and supported on the inner wall of the housing. Through the combined use of the sealing ring and the shield tail brush, its anti-seepage performance and effect are improved.

[0012] 2. Through the connection of the support frame and the pressure plate, and the connection of the sliding plate and the telescopic spring, the pressure plate achieves an elastic sliding effect within the support frame. Through the abutting contact between the pressure plate and the connecting ring, the sealing ring is supported and controlled in its installation position within the housing, and it is convenient to disassemble and replace it. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a three-dimensional front view of the structure of this utility model;

[0015] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0016] Figure 4 This is a partial three-dimensional exploded view of the connection structure between the housing and the sealing ring of this utility model;

[0017] Figure 5 This is a partial three-dimensional bottom view of the connection structure between the housing and the sealing ring of this utility model;

[0018] Figure 6 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0019] In the diagram: 1. Casing; 11. Grouting pipe; 2. Shield tail brush; 3. Sealing ring; 31. Connecting ring; 32. Positioning column; 33. Rubber ring; 34. Positioning groove; 35. Support plate; 4. Support frame; 41. Pressure plate; 42. Slide plate; 43. Telescopic spring; 44. Pulley. Detailed Implementation

[0020] Please see Figure 1-6 One embodiment provided by this utility model:

[0021] A shield tail structure for waterproofing and preventing seepage in water-rich strata across a sea area includes a housing 1. A grouting pipe 11 is provided inside the housing 1. A shield tail brush 2 is fixedly connected to the inner wall of the housing 1. A sealing ring 3 is provided on the inner wall of the housing 1. Connecting rings 31 are fixedly connected to both sides of the sealing ring 3. A positioning post 32 is fixedly connected to the bottom end of the connecting ring 31. A rubber ring 33 is fitted onto the outer surface of the positioning post 32. A positioning groove 34 is provided on the inner wall of the housing 1. A stop plate 35 is provided on the inner wall of the positioning groove 34. A support frame 4 is fixedly connected to the inner wall of the housing 1. A pressure plate 41 is connected through the inside of the support frame 4. Slide plates 42 are fixedly connected to both sides of the pressure plate 41. A telescopic spring 43 is fixedly connected to the surface of the slide plate 42. A lever plate 44 is fixedly connected to the outer surface of the pressure plate 41. Through the connection between the housing 1 and the tail brush 2, the tail brush 2 achieves the effect of preventing water seepage when the housing 1 is in use. Under the action of the grouting pipe 11, it is convenient to perform grouting operations. The tail brush 2 and the grouting pipe 11 are existing products on existing shield tunneling equipment. Their principle is existing technology and will not be described in detail here.

[0022] Furthermore, the grouting pipes 11 are evenly distributed on the surface of the casing 1, and the tail brushes 2 are evenly distributed on the inner wall of the casing 1. The tail brushes 2 and the grouting pipes 11 work together on the casing 1 to achieve the effects of grouting and seepage prevention.

[0023] Furthermore, the interior of the sealing ring 3 is hollow, and the positioning post 32 and the positioning groove 34 are inserted into each other. The rubber ring 33 abuts against the inner wall of the positioning post 32 and the positioning groove 34. Through the connection between the sealing ring 3 and the positioning post 32, the position of the sealing ring 3 on the inner wall of the housing 1 is supported and limited by the insertion of the positioning post 32 and the positioning groove 34.

[0024] Furthermore, the abutment plates 35 are evenly distributed on the inner wall of the positioning groove 34. The abutment plates 35 abut against the outer surface of the positioning post 32 through the positioning groove 34. Through the connection between the positioning groove 34 and the abutment plates 35, the abutment plates 35 abut against the outer surface of the positioning post 32, thereby achieving the effect of fixing and supporting the sealing ring 3 on the housing 1.

[0025] Furthermore, the inner wall of the support frame 4 is provided with a long groove, the slide plate 42 is slidably connected to the long groove, and the pressure plate 41 is elastically slidably connected to the support frame 4 through the telescopic spring 43. Through the connection between the support frame 4 and the pressure plate 41, and the connection between the pressure plate 41 and the slide plate 42, the connection between the slide plate 42 and the telescopic spring 43, the elastic sliding effect of the pressure plate 41 in the support frame 4 is realized.

[0026] Furthermore, the pressure plate 41 is pressed together with the support frame 4 and the connecting ring 31. The support frame 4 is evenly distributed on both sides of the sealing ring 3, and the positions of the support frames 4 distributed on both sides of the sealing ring 3 are staggered. Through the connection of the pressure plate 41 and the lever plate 44, it is convenient to move the pressure plate 41 within the support frame 4. Under the pressure of the pressure plate 41 and the connecting ring 31, the position of the sealing ring 3 within the housing 1 is fixed, and it is convenient to disassemble and replace it.

[0027] Working principle: When installing and using the sealing ring 3, the positioning pin 32 is inserted into the positioning groove 34. Under the action of the rubber ring 33 and the abutment plate 35, the fastening performance of the connection between the positioning pin 32 and the positioning groove 34 is improved. Under the connection of the support frame 4 and the pressure plate 41, the pressure plate 41 is elastically slid within the support frame 4 through the connection of the sliding plate 42 and the telescopic spring 43. Under the action of the push plate 44, the pressure plate 41 is easily moved. Through the pressing connection of the pressure plate 41 and the connecting ring 31, the position of the sealing ring 3 within the housing 1 is further fixed, and the disassembly and replacement of the sealing ring 3 within the housing 1 is convenient.

Claims

1. A shield tail structure for preventing water seepage in sea areas, comprising a casing, characterized in that: The casing has an internal grouting pipe. A shield tail brush is fixedly connected to the inner wall of the casing. A sealing ring is provided on the inner wall of the casing. Connecting rings are fixedly connected to both sides of the sealing ring. A positioning post is fixedly connected to the bottom end of the connecting ring. A rubber ring is fitted onto the outer surface of the positioning post. A positioning groove is provided on the inner wall of the casing. A backing plate is provided on the inner wall of the positioning groove. A support frame is fixedly connected to the inner wall of the casing. A pressure plate is connected through the inside of the support frame. Slide plates are fixedly connected to both sides of the pressure plate. A telescopic spring is fixedly connected to the surface of the slide plates. A lever plate is fixedly connected to the outer surface of the pressure plate.

2. The shield tail structure for waterproofing and preventing seepage in water-rich strata across a sea area as described in claim 1, characterized in that: The grouting pipes are evenly distributed on the surface of the casing, and the shield tail brushes are evenly distributed on the inner wall of the casing.

3. The shield tail structure for waterproofing and preventing seepage in water-rich strata across a sea area as described in claim 1, characterized in that: The sealing ring is hollow inside, the positioning post and the positioning groove are inserted into each other, and the rubber ring is in contact with the inner wall of the positioning post and the positioning groove.

4. The shield tail structure for waterproofing and preventing seepage in water-rich strata across a sea area as described in claim 1, characterized in that: The abutment plates are evenly distributed on the inner wall of the positioning groove, and the abutment plates abut against the outer surface of the positioning post through the positioning groove.

5. The shield tail structure for waterproofing and preventing seepage in water-rich strata across a sea area as described in claim 1, characterized in that: The inner wall of the support frame is provided with a long groove, the slide plate is slidably connected to the long groove, and the pressure plate is elastically slidably connected to the support frame through a telescopic spring.

6. The shield tail structure for waterproofing and preventing seepage in water-rich strata crossing a sea area, as described in claim 1, is characterized in that: The pressure plate is pressed together by a support frame and a connecting ring. The support frame is evenly distributed on both sides of the sealing ring, and the positions of the support frames on both sides of the sealing ring are staggered.

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