Tunnel adjacent block

Abstract

The utility model discloses a tunnel adjoining block, and relates to the field of shield segments, and the tunnel adjoining block is characterized in that the tunnel adjoining block comprises a segment body, a containing groove is formed in the segment body, a connecting block is contained in the containing groove, a rotating assembly is arranged in the segment body, a cavity is formed in the segment body, and round pipes are arranged on the two opposite side walls of the cavity; in the transportation and hoisting process, the connecting block contained in the containing groove cannot protrude out of the surface of the sheet body, so that the connecting block is well prevented from being damaged due to collision in the transportation process, after people install the adjacent block to the needed position, the connecting block is exposed out of the end face of the sheet body by controlling the rotating assembly, and therefore the adjacent block is prevented from being damaged. The connecting block is arranged in the groove of the standard block, the connecting block is clamped in the groove of the standard block, pre-fixing of the adjacent block and the standard block is well facilitated, the sheet body made of reinforced concrete has good strength, the outer side of the sheet body is coated with the waterproof layer, and the medium erosion resistance of the adjacent block can be well improved through the arrangement.

Description

Technical Field

[0001] The utility model relates to the field of shield segments, and more specifically, to a tunnel adjacent block. Background Art

[0002] The tunnel segment is the permanent lining structure of the shield tunnel, which is mainly prefabricated with high-strength impermeable concrete. The tunnel segment is arc-shaped as a whole, and multiple segments are spliced ​​together to form the tunnel support structure. The tunnel segments are spliced ​​into rings and bear the role of resisting soil pressure, groundwater pressure and other special loads.

[0003] In the prior art, tunnel segments are classified into standard blocks, adjacent blocks and capping blocks. Standard blocks are the main components of segment rings and have regular shapes and sizes. Adjacent blocks are used to connect standard blocks and fill gaps. Adjacent blocks usually have special shapes to adapt to the curved shapes or special design requirements of tunnel segment rings. Capping blocks are used to close segment rings. After installing the capping blocks, back-shield grouting is usually required to fill the gap between the segment ring and the tunnel earth city.

[0004] In actual production, connecting blocks are formed at both ends of the adjacent blocks, while grooves into which the connecting blocks can be embedded are formed at both ends of the standard blocks. The setting of the connecting blocks and the grooves is conducive to the splicing between the standard blocks and the adjacent blocks. After the splicing is completed, people will also use special tools to completely fix the standard blocks and the adjacent blocks through hexagonal bolts. However, since the adjacent blocks and the standard blocks are prefabricated parts, they need to be transported to the site by vehicles, cranes and other tools. The connecting blocks protrude from the surface of the adjacent blocks, and are prone to collision and wear during transportation, affecting the subsequent connection stability with the standard blocks.

[0005] Therefore, new solutions need to be proposed to solve this problem. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a tunnel adjacent block. The above technical purpose of the present invention is achieved through the following technical solutions: a tunnel adjacent block, comprising an arc-shaped sheet body, two end faces of the sheet body in the arc length direction are provided with receiving grooves, a connecting block is accommodated in the receiving grooves, a rotating assembly is provided in the sheet body for exposing the connecting block on the end face of the sheet body and fixing it, a cavity is provided in the sheet body, two opposite side walls of the cavity are provided with round tubes connected to the side walls of the sheet body, and two ends of the rotating assembly are respectively rotatably connected in the two round tubes.

[0007] The utility model is further configured as follows: a square groove connected to the cavity is opened on the side wall of the accommodating groove, a gear rod sliding in the square groove is fixed on the connecting block, and the rotating assembly includes a gear meshing with the gear rod and a rotating shaft passing through the center of the gear.

[0008] The utility model is further configured as follows: both ends of the rotating shaft are provided with external threads, the inner circumferential wall of the circular tube is provided with internal threads, and both end surfaces of the rotating shaft are provided with hexagonal prisms.

[0009] The utility model is further configured as follows: the number of the toothed rods on one connecting block is two, and the two toothed rods are respectively arranged close to the two ends of the connecting block.

[0010] The utility model is further configured as follows: oblique grooves are formed on two opposite side walls of the connecting block, and the area of ​​the end surface of the connecting block facing away from the gear rod is smaller than the area of ​​the end surface of the connecting block facing the gear rod.

[0011] The utility model is further configured as follows: a grouting hole communicating with the cavity is provided on the arc-shaped convex surface of the sheet body.

[0012] The utility model is further configured as follows: the connecting block is made of a hollow square tube, and a core injection hole connecting the interior of the connecting block and the containing groove is provided on the connecting block.

[0013] The utility model is further configured as follows: the sheet body is made of reinforced concrete.

[0014] In summary, the utility model has the following beneficial effects: during the transportation and lifting of the adjacent blocks, the connecting blocks received in the accommodating grooves will not protrude from the surface of the sheet body, thereby better avoiding damage to the connecting blocks caused by collisions during transportation, and ensuring the stability of the subsequent adjacent blocks when connected to the standard blocks. After people install the adjacent blocks to the required positions, the connecting blocks are exposed on the end faces of the sheet body by rotating the rotating assembly, and the connecting blocks are inserted into the grooves of the standard blocks to complete the pre-fixation of the adjacent blocks and the standard blocks, and then the adjacent blocks and the standard blocks are completely fixed with bolts. The setting of the rotating assembly enables people to expose the connecting blocks on the surface of the sheet body by rotating the rotating assembly. At the same time, the connecting blocks fixed by the rotating assembly after the sheet body are exposed will not fall out of the grooves of the standard blocks during the subsequent use of the adjacent blocks, thereby better ensuring the connection stability between the adjacent blocks and the standard blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a partial cross-sectional view of the utility model.

[0017] In the figure: 1, sheet body; 2, receiving groove; 3, connecting block; 4, cavity; 5, round tube; 6, square groove; 7, gear rod; 8, gear; 9, rotating shaft; 10, hexagonal prism; 11, inclined groove; 12, grouting hole; 13, core injection hole. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] A tunnel adjacency block, such as Figure 1 and Figure 2 As shown, it includes an arc-shaped sheet 1, and two end faces of the sheet 1 in the arc length direction are provided with receiving grooves 2, and a connecting block 3 is accommodated in the receiving grooves 2. A rotating assembly for exposing the connecting block 3 on the end face of the sheet 1 and fixing it is provided in the sheet 1. A cavity 4 is provided in the sheet 1, and two opposite side walls of the cavity 4 are provided with round tubes 5 connected to the side walls of the sheet 1. The two ends of the rotating assembly are respectively rotatably connected to the two round tubes 5. During the transportation and hoisting of the adjacent blocks, the connecting block 3 accommodated in the receiving grooves 2 will not protrude from the surface of the sheet 1, thereby better avoiding damage to the connecting block 3 caused by collision during transportation, ensuring the subsequent adjacent blocks and the standard The stability of the standard block connection is that after people install the adjacent block to the required position, the connecting block 3 is exposed on the end face of the sheet body 1 by rotating the rotating component, and the connecting block 3 is inserted into the groove of the standard block to complete the pre-fixation of the adjacent block and the standard block, and then the adjacent block and the standard block are completely fixed with bolts. The setting of the rotating component allows people to complete the exposure of the connecting block 3 on the surface of the sheet body 1 by rotating the rotating component. At the same time, the connecting block 3 fixed by the rotating component after the sheet body 1 is exposed will not fall out of the groove of the standard block during the subsequent use of the adjacent block, thereby better ensuring the connection stability between the adjacent block and the standard block.

[0020] like Figure 2As shown, a square groove 6 connected to the cavity 4 is provided on the side wall of the accommodating groove 2, and a gear rod 7 sliding in the square groove 6 is fixed on the connecting block 3. The distance from the tooth top surface of the gear rod 7 to the bottom surface of the gear rod 7 is greater than the height of the square groove 6. The rotating assembly includes a gear 8 meshing with the gear rod 7 and a rotating shaft 9 passing through the center of the gear 8. When people need to expose the connecting block 3 on the end surface of the sheet body 1, they can rotate the rotating shaft 9, and the rotating shaft 9 drives the gear 8 to rotate. The rotating gear 8 converts the torque through the gear rod 7 into a thrust that pushes the connecting block 3 to be exposed on the end surface of the sheet body 1. The transmission of the gear 8 and the gear rod 7 has good stability, so that the extension process of the connecting block 3 is relatively smooth, so that the process of the connecting block 3 being embedded in the standard block is relatively smooth. At the same time, because the height of the gear rod 7 is greater than the height of the opening of the square groove 6, the gear rod 7 will not fall out of the square groove 6. External threads are provided at both ends of the rotating shaft 9, and internal threads are provided on the inner circumferential wall of the circular tube 5. , hexagonal columns 10 are provided on both end faces of the rotating shaft 9, and the distance between the two end faces of the two hexagonal columns 10 facing away from each other is smaller than the width of the sheet body 1, and the cross-sectional area of ​​the hexagonal columns 10 is equal to the area of ​​the head of the external hexagonal bolt. Due to the self-locking characteristics of the threaded connection, the rotating shaft 9 is not easy to rotate in the round tube 5 without the action of torsion. During the transportation and hoisting of the adjacent blocks, the connecting block 3 is not easy to escape from the accommodating groove 2 and expose on the end face of the sheet body 1. At the same time, when people expose the connecting block 3 on the end face of the sheet body 1, due to the self-locking between the external thread and the internal thread, the connecting block 3 is not easy to retract into the accommodating groove 2 by itself, which better ensures the stability of the connection between the adjacent block and the standard block. The cross-sectional area of ​​the hexagonal column 10 is equal to the area of ​​the head of the external hexagonal bolt, so that the special tool used by people to tighten the bolt can also be directly used to screw the rotating shaft 9 to rotate, making the rotation of the rotating shaft 9 more convenient.

[0021] like Figure 2 As shown, there are two toothed rods 7 on a connecting block 3, and the two toothed rods 7 are respectively arranged near the two ends of the connecting block 3. In the process of people rotating the rotating shaft 9 to push the toothed rod 7 to expose the connecting block 3 on the end surface of the sheet body 1, the toothed rods 7 arranged near the two ends of the connecting block 3 synchronously push the connecting block 3, so that the connecting block 3 is relatively stable during the process of being pushed out, so that the connecting block 3 can be embedded in the groove of the standard block more quickly. Bevel grooves 11 are formed on the two opposite side walls of the connecting block 3. The area of ​​the end surface of the connecting block 3 facing away from the toothed rod 7 is smaller than the area of ​​the end surface of the connecting block 3 facing the toothed rod 7. The setting of the bevel groove 11 makes the area of ​​the end surface of the connecting block 3 facing the standard block smaller than the cross-sectional area of ​​the groove during the process of the connecting block 3 being embedded in the groove of the standard block, so that the connecting block 3 can be embedded in the groove more quickly. At the same time, the surface of the bevel groove 11 can also play a better guiding role in the process of the connecting block 3 being embedded in the groove of the standard block, which better facilitates the process of the connecting block 3 being embedded in the groove of the standard block.

[0022] like Figure 2As shown, a grouting hole 12 connected to the cavity 4 is provided on the arc-shaped convex surface of the sheet body 1, and the connecting block 3 is made of a hollow square tube. A core injection hole 13 connecting the weight-reducing cavity and the cavity 4 is provided on the connecting block 3. The connecting block 3 made of the hollow square tube makes the connecting block 3 lighter, thereby effectively reducing the static friction between the connecting block 3 and the inner wall of the receiving groove 2, so that people can apply a smaller torque on the rotating shaft 9 to overcome the friction between the connecting block 3 and the inner wall of the receiving groove 2, which effectively saves people's physical strength. After the adjacent blocks, standard blocks and capping blocks are spliced ​​and installed, during the process of grouting behind the shield, the mortar can enter the cavity 4 through the grouting hole 12, and then the mortar can enter the receiving groove 2 through the square groove 6. In the embodiment, the opening of the centering hole 13 allows the mortar in the receiving groove 2 to enter the weight-reducing cavity. After the mortar is completely solidified, the weight-reducing cavity, the receiving groove 2 and the cavity 4 are all filled with mortar, so that the gear rod 7, the gear 8 and the rotating shaft 9 are all well fixed, so that the vibration caused during the subsequent use of the tunnel is not easy to affect the threaded connection between the rotating shaft 9 and the round tube 5, thereby better ensuring the direct connection strength between the adjacent block and the standard block. The sheet body 1 is made of reinforced concrete, which has good strength. The sheet body 1 made of reinforced concrete has good strength and can better ensure the safety of the tunnel. The outer side of the sheet body 1 is coated with a waterproof layer. This setting can better improve the adjacent block's resistance to medium erosion.

[0023] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tunnel adjacency block, characterized in that: The invention comprises an arc-shaped sheet (1), two end faces of the sheet (1) in the arc length direction are provided with receiving grooves (2), a connecting block (3) is accommodated in the receiving grooves (2), a rotating assembly is provided in the sheet (1) for making the connecting block (3) exposed on the end face of the sheet (1) and fixed, a cavity (4) is provided in the sheet (1), two opposite side walls of the cavity (4) are penetrated by a circular tube (5) connected to the side wall of the sheet (1), and two ends of the rotating assembly are respectively rotatably connected in the two circular tubes (5).

2. A tunnel adjacency block according to claim 1, characterized in that: A square groove (6) communicating with the cavity (4) is provided on the side wall of the receiving groove (2); a gear rod (7) sliding in the square groove (6) is fixed on the connecting block (3); and the rotating assembly comprises a gear (8) meshing with the gear rod (7) and a rotating shaft (9) passing through the center of the gear (8).

3. A tunnel adjacency block according to claim 2, characterized in that: External threads are provided at both ends of the rotating shaft (9), internal threads are provided on the inner circumferential wall of the circular tube (5), and hexagonal columns (10) are provided on both end faces of the rotating shaft (9).

4. A tunnel adjacency block according to claim 3, characterized in that: There are two toothed rods (7) on one connecting block (3), and the two toothed rods (7) are respectively arranged near the two ends of the connecting block (3).

5. A tunnel adjacency block according to claim 4, characterized in that: Oblique grooves (11) are formed on two opposite side walls of the connection block (3); the area of ​​the end surface of the connection block (3) facing away from the gear rod (7) is smaller than the area of ​​the end surface of the connection block (3) facing the gear rod (7).

6. A tunnel adjacency block according to claim 5, characterized in that: A grouting hole (12) communicating with the cavity (4) is provided on the arc-shaped convex surface of the sheet body (1).

7. The tunnel adjacency block according to claim 6, characterized in that: The connection block (3) is made of a hollow square tube, and a core injection hole (13) is provided on the connection block (3) for connecting the interior of the connection block (3) with the containing groove (2).

8. The tunnel adjacency block according to claim 7, characterized in that: The sheet body (1) is made of reinforced concrete.

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