A universal adapter for tension bolt rods used in shield tunnel segment pull-out performance testing

Abstract

This utility model discloses a universal adapter for tension bolts used in shield tunnel segment pull-out performance testing. This adapter aims to solve the problem that existing shield tunnel segment pull-out tests require different sizes of tension bolts due to varying thread sizes in the embedded parts on the segments, increasing manufacturing costs. The adapter includes a tension bolt rod and a threaded connector. The threaded connector is used for threaded connection with the embedded parts on the segments. The tension bolt rod and the threaded connector are detachably connected via a connecting assembly, which allows for the replacement of threaded connectors of different diameters with the tension bolt rod. This utility model allows for the disassembly and replacement of the tension bolt rod and threaded connector using a threaded connection, enabling the replacement of threaded connectors of different diameters with the tension bolt rod. Only different sized threaded connectors need to be machined to fit the embedded parts, using only a single tension bolt rod, thus reducing manufacturing costs.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling equipment testing technology, specifically relating to a universal adapter for a tension bolt rod used in shield tunnel segment pull-out performance testing. Background Technology

[0002] With the acceleration of urbanization, the development and utilization of urban underground space is becoming increasingly widespread. Shield tunnels, as an efficient and safe underground engineering construction method, have been widely used in urban subways, municipal pipelines, and other fields. As the main structural components of shield tunnels, the tunnel segments bear the pressure from the surrounding soil, groundwater pressure, and various loads during construction. Their quality and performance directly affect the overall safety and stability of the tunnel. If the pull-out resistance of the segments is insufficient, it may lead to loosening, cracking, or even detachment of the segments, seriously affecting the structural safety and normal use of the tunnel. Therefore, it is necessary to conduct pull-out performance tests on shield tunnel segments.

[0003] In existing shield tunnel segment pull-out tests, such as Figure 1 As shown, an embedded part 22 is installed in the hole of the segment 21, and then the bottom end of the tension bolt rod 23 is threadedly connected to the threaded hole on the embedded part 22. Next, a through-hole jack 24 is fitted onto the outer surface of the tension bolt rod 23, and a fixing nut 25 is threadedly connected to the top end. Then, the pull-out performance test of the segment 21 is carried out by extending the through-hole jack 24. Since the thread size of the embedded part 22 on the segment 21 is different, it is necessary to process tension bolt rods 23 of different sizes, which increases the manufacturing cost. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a universal adapter for tension bolts used in shield tunnel segment pull-out performance testing. This adapter aims to solve the problem that in existing shield tunnel segment pull-out tests, the different thread sizes of the embedded parts on the segments require the processing of tension bolts of different sizes, which increases manufacturing costs.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a universal adapter for tension bolt rods used in shield tunnel segment pull-out performance testing. The adapter includes a tension bolt rod and a threaded connector. The threaded connector is used to connect to the embedded parts on the segment. The tension bolt rod and the threaded connector are detachably connected by a connecting assembly, which allows the tension bolt rod to be replaced with threaded connectors of different diameters.

[0008] Preferably, the connecting assembly includes a threaded connecting post and a threaded connecting hole that mates with the threaded connecting post. The threaded connecting post is fixedly connected to the bottom end of the tension bolt rod, and the threaded connecting hole is formed on the upper surface of the threaded connector.

[0009] Furthermore, the diameter of the threaded connecting post is smaller than that of the threaded connecting head.

[0010] Furthermore, the threaded connector is larger than the diameter of the tension bolt rod, a connecting plate is fixedly connected to the bottom outer surface of the tension bolt rod, a through hole is opened on the connecting plate, a threaded rod is installed in the through hole, a hexagonal block is fixedly connected to the top of the threaded rod, a threaded blind hole adapted to the threaded rod is opened on the upper surface of the threaded connector, and a first locking nut is threadedly connected to the top of the outer surface of the threaded rod.

[0011] Furthermore, the connecting plate is circumferentially fixed to the outer surface of the bottom end of the tension bolt rod, and the through hole is an elongated hole. There are multiple through holes, and the multiple through holes are circumferentially distributed on the connecting plate.

[0012] Furthermore, a gap is left between the connecting plate and the bottom end of the tension bolt rod, and a second locking nut is threaded onto the outer surface of the bottom end of the threaded rod, the gap being greater than the thickness of the second locking nut.

[0013] Furthermore, the connecting assembly includes a threaded connecting sleeve and an external thread that mates with the threaded connecting sleeve. The threaded connecting sleeve is fixedly connected to the upper surface of the threaded connector, and the external thread is formed on the outer surface of the bottom end of the tension bolt rod.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention connects the threaded connecting post at the bottom of the tension bolt rod to the threaded connecting hole on the threaded connecting head. Because the threaded connection allows for disassembly of the tension bolt rod and the threaded connecting head, the tension bolt rod can be replaced with threaded connecting heads of different diameters. Only different sizes of threaded connecting heads need to be machined to match the embedded parts, and a single tension bolt rod is used, thus reducing manufacturing costs.

[0017] This invention, by setting a connecting plate and a threaded rod on the outer side of the bottom end of the tension bolt rod, allows the threaded rod to be screwed into the threaded blind hole of the threaded connector head when the tension bolt rod is connected to a larger threaded connector head via a hexagonal block. Then, the first locking nut is tightened downwards to contact the connecting plate. In this way, when the tension bolt rod is used for a pull-out test, the tension bolt rod and the threaded connector head can provide stronger tension, preventing the threaded connector head from breaking. This allows for better connection of the tension bolt rod with threaded connector heads of different diameters, resulting in better performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the existing bolt rod structure.

[0019] Figure 2 This is a schematic diagram of the connection structure of this utility model with a smaller threaded connector.

[0020] Figure 3 This is a schematic diagram of the connection structure of this utility model with a larger threaded connector.

[0021] Figure 4 This is a schematic diagram of the connecting plate of this utility model.

[0022] Figure 5 This is a schematic diagram of the threaded connector of this utility model.

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the connection between the present invention and a larger threaded connector.

[0024] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0025] The labels in the attached diagram are as follows: 1. Tension bolt rod; 2. Threaded connector; 3. Connecting assembly; 4. Threaded connecting sleeve; 5. External thread; 6. Threaded connecting post; 7. Threaded connecting hole; 8. Connecting plate; 9. Through hole; 10. Threaded rod; 11. Hexagonal block; 12. Threaded blind hole; 13. First locking nut; 14. Second locking nut. Detailed Implementation

[0026] Example 1

[0027] This specific embodiment is a universal adapter for tension bolts used in shield tunnel segment pull-out performance testing, and its structural schematic diagram is shown below. Figures 2-6 As shown, the adapter includes a tension bolt rod 1 and a threaded connector 2. The threaded connector 2 is used to connect with the embedded parts on the pipe segment. The tension bolt rod 1 and the threaded connector 2 are detachably connected by a connecting assembly 3. The connecting assembly 3 is used to replace the tension bolt rod 1 with threaded connectors 2 of different diameters.

[0028] like Figure 2 and Figure 6 As shown: In this embodiment, the connecting component 3 includes a threaded connecting post 6 and a threaded connecting hole 7 that mates with the threaded connecting post 6. The threaded connecting post 6 is fixedly connected to the bottom end of the tension bolt rod 1, and the threaded connecting hole 7 is opened on the upper surface of the threaded connector 2. In use, the threaded connecting post 6 at the bottom end of the tension bolt rod 1 is threadedly connected to the threaded connecting hole 7 on the threaded connector 2. Since the use of threaded connection allows for disassembly between the tension bolt rod 1 and the threaded connector 2, the tension bolt rod 1 can be replaced with threaded connectors 2 of different diameters. Only different sizes of threaded connectors 2 need to be machined to match the embedded parts, and the tension bolt rod 1 can be machined to the same diameter, reducing manufacturing costs.

[0029] like Figure 2 As shown: In this embodiment, the diameter of the threaded connecting post 6 is smaller than that of the threaded connecting head 2.

[0030] Meanwhile, the thread on the outer surface of the threaded connecting column 6 and the thread in the threaded connecting hole 7 of the connector 2 are designed with different thread thicknesses according to different tube segments.

[0031] Example 2

[0032] like Figure 3-6 As shown: The difference from Embodiment 1 is that in this embodiment, the threaded connector 2 is larger than the diameter of the tension bolt rod 1. A connecting plate 8 is fixedly connected to the bottom outer surface of the tension bolt rod 1. A through hole 9 is opened on the connecting plate 8. A threaded rod 10 is provided in the through hole 9. A hexagonal block 11 is fixedly connected to the top of the threaded rod 10. A threaded blind hole 12 adapted to the threaded rod 10 is opened on the upper surface of the threaded connector 2. A first locking nut 13 is threadedly connected to the top of the outer surface of the threaded rod 10.

[0033] When the tension bolt rod 1 is connected to the larger threaded connector 2, the threaded connector 2 has an auxiliary threaded blind hole 12, such as... Figure 3-6 As shown, by loosening the first locking nut 13 and the second locking nut 14, and then using a tool to screw the threaded rod 10 into the threaded blind hole 12 on the threaded connector 2 through the hexagonal block 11, and then tightening the first locking nut 13 downwards to contact the connecting plate 8, the tension bolt rod 1 and the threaded connector 2 can provide a stronger tension when the tension bolt rod 1 is used for a pull-out test, thus preventing the threaded connector 6 from breaking.

[0034] like Figure 3 and Figure 4As shown: In this embodiment, the connecting plate 8 is fixed in a ring to the outer surface of the bottom end of the tension bolt rod 1. The through hole 9 is an elongated hole, and there are multiple through holes 9 distributed circumferentially on the connecting plate 8. In this way, multiple threaded rods 10 can be used to fix the connecting plate 8 and the threaded connector 2, and the force is more evenly distributed.

[0035] like Figure 3 and Figure 6 As shown: In this embodiment, there is a gap between the connecting plate 8 and the bottom end of the tension bolt rod 1. The outer surface of the bottom end of the threaded rod 10 is threaded with a second locking nut 14, and the gap is greater than the thickness of the second locking nut 14. In this way, when the tension bolt rod 1 is connected to the smaller threaded connector 2, the bottom end of the threaded rod 10 is moved to the upper side, and then the first locking nut 13 and the second locking nut 14 are tightened to fix the threaded rod 10 and avoid affecting its use.

[0036] Example 3

[0037] like Figure 7 As shown: In this embodiment, the connecting component 3 includes a threaded connecting sleeve 4 and an external thread 5 that mates with the threaded connecting sleeve 4. The threaded connecting sleeve 4 is fixedly connected to the upper surface of the threaded connector 2, and the external thread 5 is formed on the outer surface of the bottom end of the tension bolt rod 1. This configuration allows the threaded connecting sleeve 4 to be set larger, so that the connection between the tension bolt rod 1 and the threaded connector 2 can withstand greater tension.

[0038] Working principle: When in use, the threaded connecting post 6 at the bottom of the tension bolt rod 1 is threadedly connected to the threaded connecting hole 7 on the threaded connector 2. Since the threaded connection allows for disassembly between the tension bolt rod 1 and the threaded connector 2, the tension bolt rod 1 can be replaced with threaded connectors 2 of different diameters. Only different sizes of threaded connectors 2 need to be machined to match the embedded parts, using one tension bolt rod, thus reducing manufacturing costs.

[0039] like Figure 2 As shown, when the tension bolt rod 1 is connected to the smaller threaded connector 2, the threaded connecting post 6 is machined to be smaller than the diameter of the smallest threaded connector 2. Because the diameter of the threaded connecting post 6 is relatively small, when the tension bolt rod 1 is connected to the larger threaded connector 2, an auxiliary threaded blind hole 12 is provided on the threaded connector 2, such as... Figure 3-6As shown, by loosening the first locking nut 13 and the second locking nut 14, and then using a tool to screw the threaded rod 10 into the threaded blind hole 12 on the threaded connector 2 through the hexagonal block 11, and then tightening the first locking nut 13 downwards to contact the connecting plate 8, the tension bolt rod 1 and the threaded connector 2 can provide stronger tension when the tension bolt rod 1 is used for a pull-out test, preventing the threaded connector 6 from breaking, thus making it easier to connect the tension bolt rod 1 with threaded connectors 2 of different diameters, resulting in better performance.

[0040] All technical features in this embodiment can be freely combined according to actual needs.

[0041] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A universal adapter for a pullout test of a pullout bolt rod of a shield tunnel segment, the adapter comprising a pullout bolt rod (1) and a threaded connector (2) for threaded connection with a pre-embedded part on the segment, characterized in that: The tension bolt rod (1) and the threaded connector (2) are detachably connected by a connecting assembly (3), which is used to replace the tension bolt rod (1) with threaded connectors (2) of different diameters.

2. The universal adapter for pullout test of shield tunnel segment according to claim 1, wherein, The connecting assembly (3) includes a threaded connecting post (6) and a threaded connecting hole (7) that mates with the threaded connecting post (6). The threaded connecting post (6) is fixedly connected to the bottom end of the tension bolt rod (1), and the threaded connecting hole (7) is opened on the upper surface of the threaded connector (2).

3. The universal adapter for pullout test of pullout bolts for tunnel segment according to claim 2, characterized in that, The threaded connecting post (6) is smaller than the diameter of the threaded connecting head (2).

4. The universal adapter for pullout test of pullout bolts for tunnel segment according to claim 3, characterized in that, The threaded connector (2) is larger than the diameter of the tension bolt rod (1). A connecting plate (8) is fixedly connected to the outer surface of the bottom end of the tension bolt rod (1). A through hole (9) is opened on the connecting plate (8). A threaded rod (10) is provided in the through hole (9). A hexagonal block (11) is fixedly connected to the top end of the threaded rod (10). A threaded blind hole (12) adapted to the threaded rod (10) is opened on the upper surface of the threaded connector (2). A first locking nut (13) is threadedly connected to the top end of the outer surface of the threaded rod (10).

5. The universal adapter for pullout test of pullout bolts for tunnel segments according to claim 4, characterized in that The connecting plate (8) is fixed in a ring to the outer surface of the bottom end of the tension bolt rod (1). The through hole (9) is an elongated hole. There are multiple through holes (9), and the multiple through holes (9) are circumferentially distributed on the connecting plate (8).

6. The universal adapter for pullout test of shield tunnel segment according to claim 5, characterized in that, There is a gap between the connecting plate (8) and the bottom end of the tension bolt rod (1), and the bottom outer surface of the threaded rod (10) is threaded with a second locking nut (14), and the gap is greater than the thickness of the second locking nut (14).

7. The universal adapter for pullout test of shield tunnel segment according to claim 1, wherein, The connecting assembly (3) includes a threaded connecting sleeve (4) and an external thread (5) that mates with the threaded connecting sleeve (4). The threaded connecting sleeve (4) is fixedly connected to the upper surface of the threaded connector (2), and the external thread (5) is formed on the outer surface of the bottom end of the tension bolt rod (1).

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