Top sealing block for tunnel

Abstract

The utility model discloses a top sealing block for a tunnel, which relates to a tunnel structure and is characterized in that the top sealing block comprises a base body, a groove is arranged on the base body, an abutting block is connected in the groove in a sliding mode, a flow groove is arranged on the inner wall of the groove, a pouring port is arranged on the base body, a kidney-shaped hole is arranged on the base body, and a limiting bolt is arranged on the abutting block. When the gap between the adjacent blocks is small, the abutting block can slide into the groove to reduce the overall width of the top sealing block, so that the top sealing block can be easily arranged in the gap, then the abutting block slides and abuts against the adjacent blocks, the abutting block is limited through the limiting bolt, the top sealing block is not prone to being separated from the adjacent blocks, and therefore the top sealing block is not prone to being separated from the adjacent blocks. In the shield wall post-grouting process, mortar can enter the gap between the inner wall of the groove and the abutting block from the grouting opening and the launder and fill the gap, after the mortar is solidified, the abutting block cannot slide, the overall strength of the top sealing block can be effectively improved, and the service life of the top sealing block can be guaranteed due to the arrangement of the waterproof coating.

Description

Technical Field

[0001] The utility model relates to a tunnel structure, and more specifically, to a capping block for a tunnel. Background Art

[0002] A tunnel is an engineering structure buried in the ground. For example, a subway tunnel is an underground structure specifically used for running subway vehicles. To ensure the safe operation of the tunnel, during the construction of the tunnel, a layer of tunnel segments is added to the tunnel.

[0003] Tunnel segments include standard blocks, adjacent blocks, and capping blocks. Among them, the assembly sequence of the capping block is usually after the standard blocks and adjacent blocks to ensure that the top of the tunnel is fully supported and closed. The sizes of the standard blocks and adjacent blocks are basically the same, while the size of the capping block will change according to the actual situation of the tunnel. In the prior art, the capping block is usually prefabricated in a factory and then placed in the required position by a shield machine and fixed by bolts. Generally, after the segment installation is completed, shield backfilling grouting is also carried out to fill the gap between the soil and the segment.

[0004] However, during the construction process, since the soil will exert pressure on the installed standard blocks and adjacent blocks, when these pressures are too large, it will cause the roundness of the standard blocks and adjacent blocks to be insufficient, resulting in a smaller gap between the adjacent blocks. At this time, the installation of the capping block becomes more difficult.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Utility Model

[0006] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a capping block for a tunnel.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions: A capping block for a tunnel includes a base body. A groove is provided on one side wall of the base body. A pressing block for abutting against an adjacent block is slidably connected in the groove. A plurality of flow grooves are provided on the inner wall of the groove. A pouring port communicating with the flow grooves is provided on the base body. A waist-shaped hole is provided on the base body. A limiting bolt passing through the waist-shaped hole is provided on the pressing block, and the limiting bolt is used to limit the sliding of the pressing block.

[0008] The utility model is further provided that: A circular tube is provided in the pressing block, and internal threads for cooperating with the limiting bolt are provided on the inner wall of the circular tube.

[0009] The utility model is further provided that: The waist-shaped hole includes a large hole and a small hole communicating with the groove. The limiting bolt abuts against the bottom wall of the large hole, and a cover for closing the large hole is detachably connected in the large hole.

[0010] The utility model is further arranged such that: a friction part for preventing the cover from disengaging from the large hole is provided on the cover, and the friction part is composed of a plurality of ridges.

[0011] The utility model is further arranged such that: an anti-slip sheet for increasing the friction force with the limit bolt is provided on the bottom wall of the large hole.

[0012] The utility model is further arranged such that: a pry groove is formed on the base body and is arranged close to the outer edge of the large hole.

[0013] The utility model is further arranged such that: the number of the pry grooves is one, and the depth of the pry groove is less than the depth of the large hole.

[0014] The utility model is further arranged such that: the abutting block is made of reinforced concrete.

[0015] To sum up, the utility model has the following beneficial effects: when the gap between the adjacent blocks is small, the abutting block can be slid into the groove, so as to reduce the width of the capping block, enabling people to more easily install the capping block in this gap. Then, the abutting block is slid. The waist-shaped hole is provided, so that the limit bolt can slide well along with the abutting block. When the abutting block abuts against the adjacent block, the limit bolt is used to limit the abutting block, making the capping block not easy to disengage from the adjacent block. During the subsequent post-grouting process of the shield wall, the mortar can enter the groove through the perfusion port, and the flow groove is provided, enabling the mortar to better fill the gap between the inner wall of the groove and the abutting block. After the mortar is completely solidified, the abutting block can no longer slide in the groove, making the abutting block better abut against the adjacent block. In addition, since the groove is filled with the solidified mortar, the strength of the capping block can be better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the utility model;

[0017] Figure 2 is a sectional view of the utility model;

[0018] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0019] Figure 4 is a schematic structural view of the cover in the utility model.

[0020] In the figure: 1, base body; 2, groove; 3, abutting block; 4, flow groove; 5, perfusion port; 6, limit bolt; 7, round pipe; 8, large hole; 9, small hole; 10, cover; 11, friction part; 12, anti-slip sheet; 13, pry groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] The capping block for a tunnel, as Figure 1 and Figure 2 shown, includes a base body 1. A groove 2 is formed in one side wall of the base body 1. A pressing block 3 for abutting against an adjacent block is slidably connected in the groove 2. A plurality of flow grooves 4 are formed in the inner wall of the groove 2. A pouring port 5 communicating with the flow grooves 4 is formed in the base body 1. A waist-shaped hole is formed in the base body 1. A limiting bolt 6 passing through the waist-shaped hole is provided on the pressing block 3. The limiting bolt 6 is used to limit the sliding of the pressing block 3. When the gap between adjacent blocks is small, the pressing block 3 can be slid into the groove 2, thereby reducing the width of the capping block, so that people can more easily install the capping block in this gap. Then, the pressing block 3 is slid. The formation of the waist-shaped hole enables the limiting bolt 6 to slide well with the pressing block 3. When the pressing block 3 abuts against the adjacent block, the pressing block 3 is limited by the limiting bolt 6, so that the capping block is not easily separated from the adjacent block. During the subsequent grouting behind the shield wall, the mortar can enter the groove 2 through the pouring port 5. The arrangement of the flow grooves 4 enables the mortar to better fill the gap between the inner wall of the groove 2 and the pressing block 3. After the mortar is completely solidified, the pressing block 3 can no longer slide in the groove 2, so that the pressing block 3 can better abut against the adjacent block. In addition, since the groove 2 is filled with the solidified mortar, the strength of the capping block can be better guaranteed.

[0023] As Figures 2 to 4As shown in the figure, a circular tube 7 is provided in the pressing block 3. An internal thread for mating with the limit bolt 6 is provided on the inner wall of the circular tube 7. Specifically, the pressing block 3 is made of reinforced concrete. Before the pouring of the pressing block 3 begins, one end of the circular tube 7 with an internal thread is welded to the steel bar framework of the pressing block 3, and then the pressing block 3 is poured with concrete. Reinforced concrete has high structural strength, making the pressing block 3 strong enough. Welding the circular tube 7 to the steel bar framework of the pressing block 3 makes the connection strength between the circular tube 7 and the pressing block 3 high. When people slide the pressing block 3 to the required position, the limit bolt 6 can be screwed into the circular tube 7 to complete the positioning of the pressing block 3. The internal thread provided in the circular tube 7 compared with the connection method of the limit bolt 6 and the reinforced concrete can effectively improve the strength of the internal thread, thereby improving the connection strength between the limit bolt 6 and the pressing block 3. The waist-shaped hole includes a large hole 8 and a small hole 9 communicating with the groove 2. The limit bolt 6 abuts against the bottom wall of the large hole 8. A cover 10 for closing the large hole 8 is detachably connected in the large hole 8. The depth of the large hole 8 is greater than the height of the head of the limit bolt 6. When the limit bolt 6 is screwed tight, the limit bolt 6 abuts against the bottom wall of the large hole 8, making it difficult for the limit bolt 6 to slide in the large hole 8, thereby completing the positioning of the pressing block 3. The opening of the large hole 8 makes the head of the limit thread not protrude on the side wall of the base body 1. After the subsequent mortar enters the groove 2, the setting of the cover 10 can better close the large hole 8, making it difficult for the mortar to overflow from the large hole 8. In addition, after the cover 10 is installed in the large hole 8, it can also effectively improve the flatness of the outside of the capping block, which is beneficial to the installation and splicing of other subsequent segments. The cover 10 is provided with a friction part 11 for preventing the cover 10 from coming out of the large hole 8. The friction part 11 is composed of several convex strips. Specifically, the cover 10 is integrally formed by stamping a iron sheet, and the convex strips are formed by secondary stamping on the cover 10. The iron sheet has good plasticity, which can better ensure the processing and forming of the cover 10. At the same time, the iron sheet has certain elasticity. During the process of installing the cover 10 in the large hole 8, the convex strips can deform, and these deformations can effectively increase the friction force between the friction part 11 and the inner wall of the large hole 8, thereby better restricting the cover 10 in the large hole 8. The bottom wall of the large hole 8 is provided with an anti-slip sheet 12 for increasing the friction force with the limit bolt 6. The anti-slip sheet 12 is made of a rubber sheet. The surface of the anti-slip sheet 12 facing away from the bottom wall of the large hole 8 is processed to form a rough surface. When the limit bolt 6 is tightened, the limit bolt 6 abuts against the anti-slip sheet 12 and generates a force that deforms the anti-slip sheet 12. Under the action of its own material, the anti-slip sheet 12 will generate a force to restore its deformed part. This force can better increase the friction force between the limit bolt 6 and the anti-slip sheet 12, thereby effectively preventing the limit bolt 6 from sliding in the large hole 8. A pry groove 13 is provided on the base body 1 near the outer edge of the large hole 8. The setting of the pry groove 13 enables people to insert tools such as pry bars and apply force to pry the cover 10 out of the large hole 8.Make the disassembly of the cover 10 more convenient. The number of prying grooves 13 is one, and the depth of the prying groove 13 is less than the depth of the large hole 8. The single-set prying groove 13 can reduce the processing process of the base body 1. Setting the depth of the prying groove 13 smaller than the depth of the large hole 8 enables the cover 10 to effectively seal the large hole 8, so that the mortar is not easily spilled from the prying groove 13. Waterproof coatings are applied on the outer surfaces of the base body 1 and the abutting block 3. The waterproof coating is made of polyurethane paint. The waterproof coating made of polyurethane paint can effectively prevent the influence of groundwater penetration on the capping block, thereby effectively increasing the service life of the capping block.

[0024] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. Any technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. Closure block for tunnel, characterized in that: It includes a base body (1). A groove (2) is formed in one side wall of the base body (1). A pressing block (3) for abutting against an adjacent block is slidably connected in the groove (2). A plurality of flow grooves (4) are formed in the inner wall of the groove (2). A pouring port (5) communicating with the flow grooves (4) is formed in the base body (1). An oblong hole is formed in the base body (1). A limiting bolt (6) passing through the oblong hole is provided on the pressing block (3), and the limiting bolt (6) is used to limit the sliding of the pressing block (3).

2. The closure block for a tunnel according to claim 1, wherein: A circular tube (7) is provided in the pressing block (3), and internal threads for cooperating with the limiting bolt (6) are formed in the inner wall of the circular tube (7).

3. The capping block for a tunnel according to claim 2, characterized in that: The oblong hole includes a large hole (8) and a small hole (9) communicating with the groove (2). The limiting bolt (6) abuts against the bottom wall of the large hole (8). A cover (10) for closing the large hole (8) is detachably connected in the large hole (8).

4. The capping block for a tunnel according to claim 3, characterized in that: A friction part (11) for preventing the cover (10) from disengaging from the large hole (8) is provided on the cover (10), and the friction part (11) is composed of a plurality of convex strips.

5. The closure block for a tunnel according to claim 4, characterized in that: An anti-slip sheet (12) for increasing the friction force with the limiting bolt (6) is provided on the bottom wall of the large hole (8).

6. The closure block for a tunnel according to claim 5, wherein: A prying groove (13) is formed in the base body (1) and is arranged close to the outer edge of the large hole (8).

7. The closure block for a tunnel according to claim 6, characterized in that: The number of the prying grooves (13) is one, and the depth of the prying groove (13) is less than the depth of the large hole (8).

8. The capping block for a tunnel according to claim 7, characterized in that: The pressing block (3) is made of reinforced concrete.

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