Shield segment structure

Abstract

The utility model discloses a shield segment structure which comprises a plurality of segments arranged in a tunnel, the segments are annularly arranged in the circumferential direction of the tunnel, grooves are formed in the segments on the two sides of the upper portion of the tunnel respectively, bags are arranged in the grooves, protection blocks are arranged on the sides, away from the center of the tunnel, of the bags, and the protection blocks are arranged in the grooves. A grouting pipe is arranged on the bag, one end of the grouting pipe is communicated with the interior of the bag, the other end of the grouting pipe penetrates through the pipe piece to be communicated with the inner side space of the pipe piece, and a lower grouting hole penetrates through the pipe piece on the lower portion of the tunnel. The shield segment structure is convenient to construct and not prone to causing segment damage.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels and underground engineering, in particular to a shield segment structure. Background Art

[0002] In shield-bored tunnels, because the cutterhead diameter is larger than the outer diameter of the segments, gaps remain between the segments and the surrounding rock, requiring simultaneous grouting to fill them. However, excessive water flow behind the segments will dilute the slurry, prolonging the initial setting time. Some segments may even fail to be completely covered by the slurry, causing the segments to float, potentially leading to misalignment or even damage.

[0003] In order to prevent the segments from floating up during grouting, the existing shield segment structures usually need to be fixed around the segments by the following methods: first, filling slurry around the segments, but this method is ineffective when encountering a water-rich layer with fast water flow; second, fixing support rods on the upper part of the segments and injecting grout into the gap between the segments and the stratum. The slurry condenses to form a supporting whole. The support rods can press against the rock stratum to prevent the segments from floating up, but because the support rods are too thin, stress concentration in the segments can easily lead to segment rupture; third, setting pull-out piles at the bottom of the segments and using the friction between the pull-out piles and the stratum to constrain the segments, but this method usually requires pile foundation construction equipment, which is inconvenient to construct inside the segments and can easily cause damage to the segments. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a shield segment structure which is convenient to construct and not prone to causing damage to the segments.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A shield segment structure includes multiple segments arranged in a tunnel, each of the segments being arranged in a ring along the circumference of the tunnel, grooves being provided on the segments on both sides of the upper part of the tunnel, a bag being provided in each of the grooves, a protective block being provided on the side of the bag away from the center of the tunnel, a grouting pipe being provided on the bag, one end of the grouting pipe being connected to the interior of the bag, and the other end passing through the segment and connecting to the inner space of the segment, and a lower grouting hole being passed through the segment at the lower part of the tunnel.

[0007] As a further improvement of the above technical solution:

[0008] The grooves are arranged opposite to each other.

[0009] The groove is a square groove, and the bag is cooperatively connected with the groove.

[0010] The bag and the groove are connected by bolts or glue.

[0011] The protective block is connected to the bladder adhesive.

[0012] The protective block is a square steel block.

[0013] A through hole is provided at a position of the pipe segment corresponding to the grouting pipe, and the grouting pipe is passed through the through hole.

[0014] An upper grouting hole is penetrated through the pipe segment at the top of the tunnel.

[0015] The grouting holes are distributed symmetrically with respect to the center.

[0016] A grouting valve is provided on the grouting pipe.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The shield segment structure of the present invention is connected to a pneumatic grouting pump via a grouting pipe, and a well-proportioned slurry is input into the bags on both sides of the upper part of the segment. After the grouting of the bag is completed, the protective block will be lifted to the predetermined position, and the grouting slurry in the bag can be quickly solidified. Then, the lower grouting hole is connected to the grouting component of the shield machine, and the slurry can be filled into the gaps reserved in the tunnel surrounding rock outside the segment. This shield segment structure supports the segment through the bag to prevent it from floating up. The bag can avoid damage to the segment due to stress concentration, which helps to extend the service life of the segment. In addition, this shield segment structure is easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the shield segment structure of the utility model.

[0020] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the shield segment structure of the present utility model.

[0022] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0023] The numbers in the figure represent:

[0024] 1. Segment; 11. Through hole; 2. Groove; 3. Bladder; 4. Protective block; 5. Grouting pipe; 6. Lower grouting hole; 7. Tunnel; 8. Upper grouting hole; 9. Grouting valve. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] Figures 1 to 4 An embodiment of the shield segment structure of the present invention is shown. The shield segment structure of this embodiment includes a plurality of segments 1 arranged in a tunnel 7. Each segment 1 is arranged in a ring shape along the circumference of the tunnel 7. Grooves 2 are respectively provided on the segments 1 on both sides of the upper part of the tunnel 7. A bag 3 is provided in each groove 2. A protective block 4 is provided on the side of the bag 3 away from the center of the tunnel 7. A grouting pipe 5 is provided on the bag 3. One end of the grouting pipe 5 is connected to the interior of the bag 3, and the other end passes through the segment 1 and is connected to the inner space of the segment 1. A lower grouting hole 6 is penetrated on the segment 1 at the lower part of the tunnel 7.

[0030] Through the grouting pipe 5, a pneumatic grouting pump is connected to input a well-proportioned slurry [such as 75% A liquid (cement: water = 1-1.5:1), 25% B liquid (water: water glass = 1:1)] into the bags 3 on both sides of the upper part of the segment 1. After the grouting of the bag 3 is completed, the protective block 4 will be lifted to the predetermined position, and the grouting slurry in the bag 3 can quickly solidify. Then, the lower grouting hole 6 is connected to the grouting component of the shield machine. At this time, the slurry can be filled into the gap reserved in the tunnel surrounding rock outside the segment 1. This shield segment structure supports the segment 1 through the bag 3 to prevent it from floating up. The bag 3 can avoid damage to the segment 1 due to stress concentration, which helps to extend the service life of the segment 1. In addition, this shield segment structure is easy to construct.

[0031] Furthermore, in this embodiment, the grooves 2 are arranged relative to each other. The grooves 2 are arranged relative to each other, that is, the bladder bags 3 are arranged thereon. The symmetrical arrangement of the bladder bags 3 can better prevent the tube sheet from floating up.

[0032] Furthermore, in this embodiment, the groove 2 is a square groove, and the bag 3 is connected to the groove 2. The groove 2 is a square groove, which is easy to process. The bag 3 is connected to the groove 2 with good bonding strength.

[0033] Furthermore, in this embodiment, the bag 3 and the groove 2 are connected by bolts or glue.

[0034] Furthermore, in this embodiment, the protective block 4 is adhesively connected to the pouch 3 .

[0035] Furthermore, in this embodiment, the protective block 4 is a square steel block. The protective block 4 is wrapped with double-sided tape on all sides. The side (outer side) of the bag 3 away from the center of the tunnel 7 is covered by the protective block 4 to prevent the bag 3 from being scratched. The protective block 4 can provide an anti-scratch function, effectively preventing the bag 3 from being scratched when it is brushed by the shield tail composed of dense fine steel wire or spring steel sheets, and reducing damage to the bag 3 when the pipe segment 1 moves away from the shield tail. The thickness of the protective block 4 can be 0.5 mm.

[0036] Furthermore, if Figure 2 As shown, in this embodiment, a through hole 11 is provided at a position corresponding to the grouting pipe 5 of the pipe segment 1 , and the grouting pipe 5 is passed through the through hole 11 .

[0037] Furthermore, in this embodiment, the segment 1 at the top of the tunnel 7 is penetrated with an upper grouting hole 8. The upper grouting hole 8 is used to fill the gap reserved in the tunnel surrounding rock on the upper portion of the segment 1 with grouting liquid.

[0038] Furthermore, in this embodiment, the grouting holes are distributed symmetrically with respect to the center.

[0039] Furthermore, in this embodiment, a grouting valve 9 is provided on the grouting pipe 5. Preferably, the grouting valve 9 is a ball valve.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into equivalent embodiments with equivalent variations. Therefore, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A shield segment structure, comprising a plurality of segments (1) arranged in a tunnel (7), wherein each of the segments (1) is arranged in an annular shape along the circumference of the tunnel (7), and characterized in that: Grooves (2) are respectively provided on the pipe segments (1) on both sides of the upper portion of the tunnel (7), and a bag (3) is provided in each of the grooves (2). A protective block (4) is provided on the side of the bag (3) away from the center of the tunnel (7). A grouting pipe (5) is provided on the bag (3), and one end of the grouting pipe (5) is communicated with the interior of the bag (3), and the other end passes through the pipe segment (1) and is communicated with the inner space of the pipe segment (1). A lower grouting hole (6) is penetrated on the pipe segment (1) at the lower portion of the tunnel (7).

2. The shield segment structure according to claim 1, characterized in that: The grooves (2) are arranged relative to each other.

3. The shield segment structure according to claim 1, characterized in that: The groove (2) is a square groove, and the bag (3) is cooperatively connected to the groove (2).

4. The shield segment structure according to claim 1, characterized in that: The bag (3) and the groove (2) are connected by bolts or glue.

5. The shield segment structure according to claim 1, characterized in that: The protective block (4) is connected to the bladder bag (3) by adhesive bonding.

6. The shield segment structure according to claim 1, characterized in that: The protective block (4) is a square steel block.

7. The shield segment structure according to claim 1, characterized in that: A through hole (11) is provided at a position of the pipe segment (1) corresponding to the grouting pipe (5), and the grouting pipe (5) is passed through the through hole (11).

8. The shield segment structure according to any one of claims 1 to 7, characterized in that: An upper grouting hole (8) is passed through the pipe segment (1) at the top of the tunnel (7).

9. The shield segment structure according to claim 8, characterized in that: The grouting holes are distributed symmetrically with respect to the center.

10. The shield segment structure according to any one of claims 1 to 7, characterized in that: The grouting pipe (5) is provided with a grouting valve (9).

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