Prefabricated concrete shield segment

Abstract

The utility model discloses a prefabricated concrete shield segment, which relates to the field of prefabricated concrete shield segments, and comprises a shield segment, one side of the shield segment is provided with an outer groove, the other side of the shield segment is provided with an outer convex block, one end of the shield segment is provided with a side convex block, and the other end of the shield segment is provided with a side groove. Waterproof assemblies are arranged on side lines of the inner surface of the shield segment, an inner wall cavity is formed in the shield segment, fixing holes are formed in the inner wall cavity, and fixing screws are arranged in the fixing holes. According to the shield segment combination fixing structure, the outer grooves, the outer protruding blocks, the side protruding blocks, the side grooves, the clamping grooves, the waterproof strips, the protection protruding blocks and the L-shaped buckles are arranged, so that the problems that the shield segment combination fixing is inconvenient, and water seepage is prevented are solved, the outer grooves and the outer protruding blocks are matched, and the side protruding blocks and the side grooves are matched; the L-shaped buckles are fixed in the clamping grooves formed after the two shield segments are combined, so that the shield segments can be better fixed.

Description

Technical Field

[0001] The utility model relates to the field of precast concrete shield segments, in particular to a precast concrete shield segment. Background Technique

[0002] Shield segments are key components in shield tunnel construction. They not only play a role in supporting the tunnel structure but also can effectively isolate groundwater and soil, ensuring construction safety and the long-term stability of the tunnel. The technological development of shield segments has experienced a transformation from cast iron segments and steel pipe segments to modern reinforced concrete segments. Reinforced concrete segments have become the mainstream segment material due to their high strength, good durability, and ability to adapt to different geological conditions.

[0003] The published patent with the publication number CN211666722U discloses a tunnel shield segment, which includes a segment body. Both sides of the bottom of the segment body are fixedly connected with connecting blocks. A rotating shaft is arranged on the surface of the connecting block, and an arc-shaped piece is movably connected to the surface of the rotating shaft. A fixing bolt is in threaded connection with the inner cavity of the arc-shaped piece. A through groove for cooperating with the fixing bolt is opened on the surface of the segment body. A clamping column is fixedly connected to the left side of the segment body, and a clamping groove for cooperating with the clamping column is opened on the right side of the segment body.

[0004] However, setting fixing components on the outer surface of the shield segment is inconvenient to operate in actual work, and there will be a situation of groundwater infiltration at the splicing joints of the existing shield segments after combination. Summary of the Utility Model

[0005] Based on this, the purpose of the present utility model is to provide a precast concrete shield segment to solve the problems of inconvenient combination and fixation of shield segments and water leakage prevention.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A precast concrete shield segment, including a shield segment. An outer groove is arranged on one side of the shield segment, and an outer convex block is arranged on the other side of the shield segment. A side convex block is arranged at one end of the shield segment, and a side groove is arranged at the other end of the shield segment. Waterproof components are arranged on the inner surface edges of the shield segment. An inner wall cavity is arranged inside the shield segment. Fixing holes are opened in the inner wall cavity, fixing screws are arranged in the fixing holes, and fixing nuts are sleeved at one ends of the fixing screws.

[0007] By adopting the above technical solution, the present utility model solves the problems of inconvenient combination and fixation of shield segments and water leakage prevention by setting an outer groove, an outer convex block, a side convex block, a side groove, a clamping groove, a waterproof strip, a protection convex block, and an L-shaped buckle. Through the mutual cooperation between the set outer groove and outer convex block, and side convex block and side groove, the L-shaped buckle is fixed in the clamping groove formed after the combination of two shield segments, enabling the shield segments to be better fixed.

[0008] The utility model is further configured such that the waterproof component includes a protection bump disposed on the inner side line of the shield segment, and a waterproof strip is fixed to one side of the protection bump.

[0009] By adopting the above technical solution, by providing the protection bump, the splicing gap between the shield segments is increased, and the waterproof strip fixed to one side of the protection bump is utilized without damaging the main structure of the shield segment to prevent the infiltration of groundwater.

[0010] The utility model is further configured such that the waterproof strip is higher than the surface of the protection bump.

[0011] By adopting the above technical solution, during the splicing process of the shield segments, the mutually contacting waterproof strips will be extruded, and by extruding the waterproof strips, the sealing performance between the shield segments is enhanced, preventing the infiltration of groundwater.

[0012] The utility model is further configured such that the inner wall of the outer groove fits with the outer wall of the outer bump.

[0013] By adopting the above technical solution, through the tight fit between the outer groove and the outer bump, the outer ends of the two shield segments are misaligned and coupled, strengthening the stability between the shield segments while also extending the gap where the two shield segments are joined, increasing the difficulty of groundwater infiltration.

[0014] The utility model is further configured such that the outer wall of the side bump fits with the inner wall of the side groove.

[0015] By adopting the above technical solution, it is convenient for the assembly of the shield segments, and through the mutual limitation between the side bump and the side groove, the stability between the shield segments is enhanced.

[0016] The utility model is further configured such that a card slot is provided on one side of the shield segment, and an L-shaped buckle is installed inside the card slot.

[0017] By adopting the above technical solution, a complete card slot will be formed during the assembly of the shield segments, and by fixing an L-shaped buckle therein, a good limiting effect can be achieved.

[0018] The utility model is further configured such that a rubber pad is fixed to the end of the L-shaped buckle, and a handle is fixed to one side of the L-shaped buckle.

[0019] By adopting the above technical solution, the rubber pad is provided to avoid its collision with the shield segment, and through the fixedly provided handle, it is convenient for the installation and removal of the L-shaped buckle.

[0020] In summary, the utility model mainly has the following beneficial effects:

[0021] 1. The utility model solves the problems of inconvenient combination and fixation of shield segments and water seepage prevention by providing an outer groove, an outer convex block, a side convex block, a side groove, a clamping groove, a waterproof strip, a protection convex block and an L-shaped buckle. Through the mutual cooperation between the provided outer groove and outer convex block, and between the side convex block and side groove, the L-shaped buckle is fixed in the clamping groove formed after the combination of two shield segments, enabling better fixation of the shield segments.

[0022] 2. Through the provided waterproof strip and protection convex block, after the combination of shield segments, the protection convex blocks will fit together, squeezing the waterproof strip to make it airtight, avoiding the problem of groundwater seepage. Moreover, through the external outer groove and outer convex block, due to their tight fit, the outer ends of the two shield segments are misaligned and coupled, strengthening the stability between the shield segments while also extending the gap between the two connected shield segments, increasing the difficulty of groundwater seepage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view structural schematic diagram of the utility model;

[0024] Figure 2 is the rear view structural schematic diagram of the utility model;

[0025] Figure 3 is the cross-sectional view of the clamping groove of the utility model;

[0026] Figure 4 is the cross-sectional view of the installation of the fixing screw of the utility model;

[0027] Figure 5 is the structural schematic diagram of the utility model;

[0028] Figure 6 is the partial schematic diagram of the utility model;

[0029] Figure 7 is the schematic diagram of the screw fixing assembly of the utility model;

[0030] Figure 8 is the schematic diagram of the L-shaped buckle of the utility model.

[0031] In the figure: 1. Shield segment; 2. Outer groove; 3. Outer convex block; 4. Side convex block; 5. Side groove; 6. Inner wall cavity; 7. Fixing hole; 8. Clamping groove; 9. Waterproof strip; 10. Protection convex block; 11. Fixing screw; 12. Fixing nut; 13. L-shaped buckle; 14. Handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0033] The embodiments of the present utility model will be described below according to its overall structure.

[0034] A precast concrete shield segment, as Figure 1 - Figure 5 shown, includes a shield segment 1. An outer groove 2 is provided on one side of the shield segment 1, and an outer convex block 3 is provided on the other side of the shield segment 1. A side convex block 4 is provided at one end of the shield segment 1, and a side groove 5 is provided at the other end of the shield segment 1. Waterproof components are provided on the inner surface edges of the shield segment 1. An inner wall cavity 6 is provided inside the shield segment 1, a fixing hole 7 is opened in the inner wall cavity 6, a fixing screw 11 is provided in the fixing hole 7, and a fixing nut 12 is sleeved at one end of the fixing screw 11.

[0035] Please refer to Figure 5 and Figure 6 , the waterproof component includes a protection convex block 10 provided on the inner edge. A waterproof strip 9 is fixed on one side of the protection convex block 10. By providing the protection convex block 10, the splicing gap between the shield segments 1 is increased. Using the waterproof strip 9 fixed on one side of the protection convex block 10 without damaging the main structure of the shield segment 1, the penetration of groundwater is prevented.

[0036] Please refer to Figure 6 , the waterproof strip 9 is higher than the surface of the protection convex block 10. During the splicing process of the shield segments 1, the mutually contacting waterproof strips 9 will be extruded. By extruding the waterproof strips 9, the sealing performance between the shield segments 1 is enhanced, and the penetration of groundwater is prevented.

[0037] Please refer to Figure 1 and Figure 2 , the inner wall of the outer groove 2 fits with the outer wall of the outer convex block 3. Through the tight fit between the outer groove 2 and the outer convex block 3, the outer ends of the two shield segments 1 are misaligned and coupled, strengthening the stability between the shield segments 1 while also extending the joint gap between the two shield segments 1, increasing the difficulty of groundwater penetration.

[0038] Please refer to Figure 1 and Figure 2 , the outer wall of the side convex block 4 fits with the inner wall of the side groove 5, facilitating the assembly between the shield segments 1, and enhancing the stability between the shield segments 1 through the mutual limitation between the side convex block 4 and the side groove 5.

[0039] Please refer to Figure 1 and Figure 3 , a card slot 8 is opened on one side of the shield segment 1, and an L-shaped buckle 13 is installed inside the card slot 8. A complete card slot 8 will be formed when the shield segments 1 are assembled. By fixing an L-shaped buckle 13 therein, a good limiting effect can be achieved.

[0040] Please refer to Figure 7, a rubber pad is fixed to the end of the L-shaped buckle 13, and a handle 14 is fixed to one side of the L-shaped buckle 13. The rubber pad is provided to prevent it from colliding with the shield segment 1. Through the fixedly arranged handle 14, the installation and disassembly of the L-shaped buckle 13 are facilitated.

[0041] A precast concrete shield segment, as Figure 3 - Figure 5 shown, the technical solutions and parts of this embodiment are basically the same as those of the first embodiment. The same technical parts will not be elaborated here. The differences are (if there are not two solutions to the same problem, it can be written as:

[0042] The working principle of the present utility model is as follows: After the first shield segment 1 is placed in a standard manner, align the convex block 3 of the second shield segment 1 with the outer groove 2 of the first shield segment 1, and complete the fitting by rotating it. The protection convex blocks 10 between the two are in contact with each other, and the waterproof strip 9 is tightly squeezed. Pass the fixing screw 11 through the fixing holes 7 of the two shield segments 1, and use the fixing nut 12 to fix it. Put the L-shaped buckle 13 into the card slot 8 formed by the two shield segments 1 through the handle 14 to fix it.

[0043] Although the embodiments of the present utility model have been shown and described, this specific embodiment is only an explanation of the present utility model, and it is not a limitation of the utility model. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not make creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A prefabricated concrete shield segment, comprising a shield segment (1), characterized in that: An outer groove (2) is provided on one side of the shield segment (1), and an outer protrusion (3) is provided on the other side of the shield segment (1); a side protrusion (4) is provided on one end of the shield segment (1), and a side groove (5) is provided on the other end of the shield segment (1); waterproof components are provided on the inner surface edges of the shield segment (1); an inner wall cavity (6) is provided inside the shield segment (1); a fixing hole (7) is provided in the inner wall cavity (6); a fixing screw (11) is provided in the fixing hole (7); and a fixing nut (12) is sleeved on one end of the fixing screw (11).

2. The precast concrete shield segment according to claim 1, characterized in that: The waterproof component comprises a protective convex block (10) arranged on the inner edge of the shield segment (1), and a waterproof strip (9) is fixed on one side of the protective convex block (10).

3. The precast concrete shield segment according to claim 2, characterized in that: The waterproof strip (9) is higher than the surface of the protective protrusion (10).

4. The precast concrete shield segment according to claim 1, characterized in that: The inner wall of the outer groove (2) and the outer wall of the outer protrusion (3) are in contact with each other.

5. The precast concrete shield segment according to claim 1, characterized in that: The outer wall of the side protrusion (4) fits with the inner wall of the side groove (5).

6. The precast concrete shield segment according to claim 1, characterized in that: A clamping slot (8) is provided on one side of the shield segment (1), and an L-shaped clamping buckle (13) is installed inside the clamping slot (8).

7. The precast concrete shield segment according to claim 6, characterized in that: A rubber pad is fixed to the end of the L-shaped buckle (13), and a handle (14) is fixed to one side of the L-shaped buckle (13).

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