A precast concrete shield segment

Abstract

The utility model discloses a kind of prefabricated concrete shield segment, it is related to concrete shield segment technical field, including multiple segment blocks and multiple connecting blocks, multiple segment blocks are connected by connecting block.The prefabricated concrete shield segment of the utility model, by supporting piece and reinforcing rib to support segment block, increase the strength of segment block, increase the flexural strength of concrete shield segment, and by steel wire mesh layer, increase the crack resistance of concrete shield segment, improve the strength of concrete shield segment, so that concrete shield segment can adapt to more complex geology;Through the effect of sealing ring, realize double-layer sealing, improve the sealing between segment block and connecting piece;And by bolt, connecting piece and segment block are fixed, it is convenient to the assembly between segment block and connecting block, it is convenient to the assembly of concrete shield segment;Through the effect of rubber layer, increase the shock resistance of concrete shield segment.

Description

Technical Field

[0001] This utility model relates to the field of concrete shield tunnel segment technology, and more specifically, to a precast concrete shield tunnel segment. Background Technology

[0002] Shield tunnel segments are the main assembly components in shield tunneling construction. They form the outermost barrier of the tunnel, bearing the responsibility of resisting soil pressure, groundwater pressure, and other special loads. In the field of modern tunnel engineering construction, shield tunneling has become the mainstream construction method for various underground tunnels, including urban subways, highway tunnels, railway tunnels, and water conservancy projects, due to its significant advantages such as high efficiency, safety, and minimal impact on the surrounding environment. Precast concrete shield tunnel segments, as key components in constructing the permanent lining structure of tunnels in shield tunneling construction, directly affect the overall quality, safety, waterproofing, and durability of the tunnel project.

[0003] Currently, the precast concrete tunnel segments widely used in the market are mainly based on reinforced concrete. Although traditional reinforced concrete segments can meet the requirements of conventional working conditions, their limitations gradually become apparent when facing high loads under complex geological conditions. For example, in tunnels passing through soft soil strata, fault fracture zones, or high water pressure areas, the segments need to withstand huge radial pressure, axial thrust, and additional stress generated by uneven settlement. The poor synergistic stress-bearing performance of the concrete matrix and steel reinforcement makes it difficult for their crack resistance, flexural strength, and shear strength to match the requirements of extreme working conditions, making them prone to penetrating cracks in areas of concentrated stress. Utility Model Content

[0004] The main objective of this invention is to provide a precast concrete shield tunnel segment that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A precast concrete shield tunnel segment includes multiple tunnel segments and multiple connecting blocks, wherein the multiple tunnel segments are connected by the connecting blocks;

[0007] The tube structure includes segmented blocks, each segmented block has an interlocking groove on both sides, a sealing groove at both ends, a casting hole on the inner wall of the segmented block, and bolt holes on both sides of both ends of the segmented block.

[0008] Preferably, the segmented block has a cavity inside, and a steel sheet is fixedly installed inside the cavity. The steel sheet is bent at the same arc as the segmented block. Multiple support plates are fixedly installed on the outer surface of the steel sheet. Multiple reinforcing ribs are fixedly installed on both sides of the multiple support plates. A wire mesh layer is fixedly installed on the outer surface of the multiple support plates. The wire mesh layer is fixedly installed on the inner wall of the cavity.

[0009] Preferably, the connecting block includes a connecting piece, both ends of which are fixedly installed with sealing rings, and an embedded steel plate is fixedly installed inside the connecting piece, wherein the length of both ends of the connecting piece is shorter than the length of both ends of the embedded steel plate.

[0010] Preferably, the sealing ring is located on the outer surface of the embedded steel plate, and fixing holes are provided on both sides of both ends of the embedded steel plate, and rubber layers are fixedly installed on both sides of the connecting piece.

[0011] Preferably, one end of the embedded steel plate is embedded in the inside of the embedding groove, and the position of the fixing hole corresponds to the bolt hole. The segment block is fixedly connected to the embedded steel plate by bolts. The sealing ring is embedded in the inside of the sealing groove. The segment block is attached to the side of the rubber layer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. By supporting the segments with support plates and reinforcing ribs, the strength of the segments is increased, the bending strength of the concrete shield tunnel segments is increased, and the crack resistance of the concrete shield tunnel segments is increased through the wire mesh layer, thereby improving the strength of the concrete shield tunnel segments and enabling them to adapt to more complex geological conditions.

[0014] 2. The sealing ring is embedded inside the sealing groove. Because the sealing ring is embedded inside the sealing groove, it seals the connecting piece and the segment block. Through the action of the sealing ring, a double seal is achieved, improving the sealing performance between the segment block and the connecting piece.

[0015] 3. The positions of the fixing holes and bolt holes correspond to each other, and the connecting pieces and the segment blocks are fixed by bolts, which facilitates the assembly of the tunnel segments and connecting blocks, and facilitates the assembly of concrete shield tunnel segments.

[0016] 4. Through the rubber layer, when the embedded steel plate is inserted into the groove, the segment blocks are pressed against the side of the rubber layer. Through the action of the rubber layer, the seismic resistance of the concrete shield tunnel segment is increased, and the segment blocks and connecting plates are prevented from being squeezed together, which could cause cracking or damage to the segment blocks or connecting plates. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the tube sheet structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the segmented block of this utility model;

[0020] Figure 4 This is a schematic diagram of the connecting block structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the connecting block of this utility model.

[0022] The attached diagram is labeled as follows: 1. Pipe segment; 2. Connecting block; 11. Segmented block; 12. Interlocking groove; 13. Sealing groove; 14. Casting hole; 15. Bolt hole; 16. Steel sheet; 17. Supporting sheet; 18. Reinforcing rib; 19. Wire mesh layer; 21. Connecting sheet; 22. Sealing ring; 23. Embedded steel plate; 24. Fixing hole; 25. Rubber layer. Detailed Implementation

[0023] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0024] As attached Figure 1 To be continued Figure 5 As shown, an embodiment of this utility model provides a precast concrete shield tunnel segment, including multiple tunnel segment blocks 1 and multiple connecting blocks 2, wherein the multiple tunnel segment blocks 1 are connected to each other through the connecting blocks 2;

[0025] like Figure 2 As shown, the pipe segment 1 includes segment 11, with interlocking grooves 12 on both sides of the segment 11, sealing grooves 13 at both ends of the segment 11, casting holes 14 on the inner wall of the segment 11, and bolt holes 15 on both sides of both ends of the segment 11.

[0026] like Figure 3 As shown, the interior of the segmented block 11 has a cavity, and a steel sheet 16 is fixedly installed inside the cavity. The curvature of the steel sheet 16 is the same as that of the segmented block 11. Multiple support plates 17 are fixedly installed on the outer surface of the steel sheet 16. Multiple reinforcing ribs 18 are fixedly installed on both sides of the multiple support plates 17. A wire mesh layer 19 is fixedly installed on the outer surface of the multiple support plates 17. The wire mesh layer 19 is fixedly installed on the inner wall of the cavity.

[0027] Concrete is poured into the interior of segment 11 through pouring hole 14, filling the cavity inside segment 11 with concrete, allowing the concrete to solidify inside segment 11, and supporting segment 11 through support plate 17 and reinforcing rib 18, increasing the strength of segment 11, increasing the bending strength of concrete shield tunnel segment, and increasing the crack resistance of concrete shield tunnel segment through wire mesh layer 19, improving the strength of concrete shield tunnel segment, and enabling concrete shield tunnel segment to adapt to more complex geological conditions.

[0028] like Figures 4-5 As shown, the connecting block 2 includes a connecting piece 21 and an embedded steel plate 23. Both ends of the connecting piece 21 are fixedly installed with sealing rings 22. The embedded steel plate 23 is fixedly installed inside the connecting piece 21. The length of both ends of the connecting piece 21 is shorter than the length of both ends of the embedded steel plate 23.

[0029] The sealing ring 22 is located on the outer surface of the embedded steel plate 23. Fixing holes 24 are provided on both sides of both ends of the embedded steel plate 23, and rubber layers 25 are fixedly installed on both sides of the connecting piece 21.

[0030] One end of the embedded steel plate 23 is embedded in the inside of the embedding groove 12, and the position of the fixing hole 24 corresponds to the bolt hole 15. The segment block 11 is fixedly connected to the embedded steel plate 23 by bolts. The sealing ring 22 is embedded in the inside of the sealing groove 13. The segment block 11 is attached to the side of the rubber layer 25.

[0031] Specifically, the sealing ring 22 is embedded inside the sealing groove 13. Since the sealing ring 22 is embedded inside the sealing groove 13, it seals the connecting piece 21 and the segment block 11. Through the action of the sealing ring 22, a double seal is achieved, improving the sealing performance between the segment block 11 and the connecting piece 21.

[0032] In addition, when the embedded steel plate 23 is inserted into the inside of the embedding groove 12, the fixing hole 24 corresponds to the bolt hole 15, and the connecting piece 21 is fixed to the segment block 11 by bolts, which facilitates the assembly between the tunnel segment block 1 and the connecting block 2, and facilitates the assembly of the concrete shield tunnel segment.

[0033] When the embedded steel plate 23 is inserted into the groove 12 through the rubber layer 25, the segment 11 is pressed against the side of the rubber layer 25. Through the action of the rubber layer 25, the seismic resistance of the concrete shield tunnel segment is increased, and the segment 11 and the connecting piece 21 are prevented from being squeezed together, which would cause the segment 11 or the connecting piece 21 to crack or be damaged.

[0034] The working process of this utility model is as follows:

[0035] Concrete is poured into the interior of the segment block 11 through the pouring hole 14, filling the cavity inside the segment block 11 with concrete and allowing the concrete to solidify inside the segment block 11. During assembly, the embedded steel plate 23 is inserted into the interior of the interlocking groove 12, so that the fixing hole 24 corresponds to the bolt hole 15. The connecting piece 21 is fixed to the segment block 11 by bolts, which facilitates the assembly between the structural tube segment 1 and the connecting block 2.

[0036] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precast concrete shield tunnel segment, comprising multiple tunnel segment blocks (1) and multiple connecting blocks (2), characterized in that: Multiple of the aforementioned tube sheet blocks (1) are connected to each other via connecting blocks (2); The tube segment (1) includes a segment (11), with a splicing groove (12) on both sides of the segment (11), a sealing groove (13) on both ends of the segment (11), a casting hole (14) on the inner wall of the segment (11), and bolt holes (15) on both sides of both ends of the segment (11).

2. The precast concrete shield tunnel segment according to claim 1, characterized in that: The segmented block (11) has a cavity inside, and a steel sheet (16) is fixedly installed inside the cavity. The arc of the steel sheet (16) is the same as that of the segmented block (11). Multiple support plates (17) are fixedly installed on the outer surface of the steel sheet (16). Multiple reinforcing ribs (18) are fixedly installed on both sides of the multiple support plates (17). A wire mesh layer (19) is fixedly installed on the outer surface of the multiple support plates (17). The wire mesh layer (19) is fixedly installed on the inner wall of the cavity.

3. The precast concrete shield tunnel segment according to claim 1, characterized in that: The connecting block (2) includes a connecting piece (21), and sealing rings (22) are fixedly installed at both ends of the connecting piece (21). An embedded steel plate (23) is fixedly installed inside the connecting piece (21), and the length of both ends of the connecting piece (21) is shorter than the length of both ends of the embedded steel plate (23).

4. A precast concrete shield tunnel segment according to claim 3, characterized in that: The sealing ring (22) is located on the outer surface of the embedded steel plate (23). Fixing holes (24) are provided on both sides of both ends of the embedded steel plate (23). Rubber layers (25) are fixedly installed on both sides of the connecting piece (21).

5. A precast concrete shield tunnel segment according to claim 4, characterized in that: One end of the embedded steel plate (23) is embedded in the inside of the embedding groove (12), and the position of the fixing hole (24) corresponds to the bolt hole (15). The segment block (11) is fixedly connected to the embedded steel plate (23) by bolts. The sealing ring (22) is embedded in the inside of the sealing groove (13). The segment block (11) is attached to the side of the rubber layer (25).

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