Longitudinal connecting device for steel arches

Abstract

A longitudinal connecting device for steel arches comprises a plurality of connecting ribs, the connecting ribs and the steel arches are arranged in a one-to-one correspondence mode, the connecting ribs are connected to webs of the steel arches in an inserted mode through fixing assemblies, and every two adjacent connecting ribs are connected through a connecting piece. According to the design, the connecting ribs are connected with the steel arches in an inserting mode, compared with welding, the connecting speed is high, the two connecting ribs are in butt joint through the connecting pieces, and the butt joint precision is high; meanwhile, the connecting ribs are connected with the steel arch frame through the fixing assemblies, the fixing effect is good, traditional welding connection is replaced with mechanical connection, fire operation in a tunnel is avoided, and particularly potential safety hazards in the tunnel with gas are greatly reduced; the connection mode of the I-shaped steel of the steel arch and the connecting ribs is directly converted from passive contact connection of the I-shaped steel and the connecting ribs into the mode that the two materials form a whole through structure interpenetration, external force is borne through the material strength, and the connection quality is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a longitudinal connection device for steel arch frames. Background Technology

[0002] Tunnel steel arches play a crucial role in stabilizing weak surrounding rock. The connection between adjacent steel arches forms a whole, which can greatly improve the load-bearing capacity of the arches. However, the connection between adjacent arches is often made by welding steel bars. The welding quality is difficult to control, resulting in weak connections, which has an important impact on the overall stability of the steel arches in the surrounding rock. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects and problems of poor connection quality in the existing technology and to provide a longitudinal connection device for steel arch frames with high connection quality.

[0004] To achieve the above objectives, the technical solution of this utility model is: a longitudinal connection device for steel arch frames, comprising multiple connecting ribs, wherein the multiple connecting ribs are arranged in a one-to-one correspondence with multiple steel arch frames, the connecting ribs are inserted into the web of the steel arch frame through fixing components, and adjacent connecting ribs are connected to each other through connectors.

[0005] The connecting bar includes an intermediate bar, two first reinforcing bars, and two second reinforcing bars. The two first reinforcing bars are connected to both ends of the intermediate bar, and the second reinforcing bars are connected to the ends of the first reinforcing bars. The diameter of the intermediate bar is larger than the diameter of the first reinforcing bars, and the diameter of the first reinforcing bars is larger than the diameter of the second reinforcing bars.

[0006] The outer circumferential surface of the intermediate rib is provided with a first external thread, and the fixing component includes two fixing nuts, which are threadedly connected to the first external thread and respectively abut against the left and right sides of the web of the steel arch frame.

[0007] The intermediate rib is fitted with a washer, which is located between the fixing nut and the web of the steel arch frame.

[0008] The end of the second reinforcing bar is provided with a second external thread, and the connector includes a sleeve, which is threadedly connected to the second external threads of two adjacent second reinforcing bars.

[0009] The sleeve abuts against limit nuts on its left and right sides, and the two limit nuts are respectively threaded to the two second reinforcing bars.

[0010] The outer diameter of the limiting nut is smaller than the outer diameter of the sleeve.

[0011] A third external thread is provided on the second reinforcing bar located on the right side of the sleeve. The third external thread is located to the right of the second external thread and its direction of rotation is opposite to that of the second external thread. The limiting nut located on the right side is threadedly connected to the third external thread.

[0012] The sleeve has a magnetic bubble attached to its outer peripheral surface near the top.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, a longitudinal connection device for a steel arch frame uses an insert-type connection to connect the connecting ribs to the steel arch frame. Compared to welding, this method offers a faster connection speed. The connecting components allow for the butt joint of two connecting ribs, resulting in high precision. Simultaneously, the connecting ribs are connected to the steel arch frame via a fixing assembly, providing excellent fixation. This mechanical connection replaces traditional welding, avoiding hot work inside the tunnel, significantly reducing safety hazards, especially in tunnels containing methane gas. Furthermore, the connection method between the I-beams of the steel arch frame and the connecting ribs is transformed from a passive contact connection to a structural interlocking of the two materials, allowing them to jointly withstand external forces through material strength, greatly improving the connection quality. Therefore, this utility model offers high connection quality and excellent fixation.

[0015] 2. In the longitudinal connection device for steel arch frames of this utility model, the connecting ribs are connected by multiple steel bars, which facilitates the insertion of the fixing components from the ends. The fixing components are connected by two nuts threaded together, which connects the connecting ribs to the steel arch frame, resulting in a good fixing effect. By setting washers, the contact area between the nuts and the steel arch frame is increased, and the nuts can be prevented from loosening. Therefore, this utility model has high connection quality and good fixing effect.

[0016] 3. In this utility model's longitudinal connection device for steel arch frames, a sleeve is used to connect two connecting ribs via a threaded connection, resulting in high connection quality. Simultaneously, limiting nuts are provided at both ends of the sleeve to prevent loosening. The limiting nuts are smaller than the sleeve to avoid accidental contact that could cause the sleeve to loosen. Furthermore, the reverse thread further enhances the limiting effect of the limiting nuts, making the sleeve connection even tighter. Therefore, this utility model offers high connection quality and excellent fixation. Attached Figure Description

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

[0018] Figure 2 This is a partial sectional view of the steel arch frame, connecting ribs, and fixing components in this utility model.

[0019] Figure 3This is a partial sectional view of the second reinforcing bar and the connector in this utility model.

[0020] Figure 4 This is a schematic diagram of the connecting rib structure in this utility model.

[0021] In the diagram: 1. Steel arch frame; 2. Connecting rib; 21. Intermediate rib; 22. First reinforcing bar; 23. Second reinforcing bar; 24. First external thread; 25. Second external thread; 26. Third external thread; 3. Fixing component; 31. Fixing nut; 32. Washer; 4. Connector; 41. Sleeve; 42. Positioning nut; 5. Magnetic bubble. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1:

[0024] See Figure 1 A longitudinal connection device for a steel arch frame includes multiple connecting ribs 2, which are arranged in a one-to-one correspondence with multiple steel arch frames 1. The connecting ribs 2 are inserted into the web of the steel arch frame 1 through fixing components 3, and adjacent connecting ribs 2 are connected to each other through connectors 4.

[0025] In this embodiment, the connecting rib 2 is first passed through the pre-drilled hole on the web of the I-beam of the steel arch frame 1, so that the web of the I-beam is exactly in the middle of the connecting rib 2. Then, the fixing component 3 is connected to the web of the I-beam for initial fixation. Then, the two connecting ribs 2 are joined together. During the joining process, the fixing component 3 is loosened to adjust the distance between the two connecting ribs 2. Finally, the two connecting ribs 2 are connected by the connector 4.

[0026] Example 2:

[0027] The basic content is the same as in Example 1, except that:

[0028] See Figure 2 and Figure 4 The connecting rib 2 includes an intermediate rib 21, two first reinforcing bars 22, and two second reinforcing bars 23. The two first reinforcing bars 22 are connected to both ends of the intermediate rib 21, and the second reinforcing bars 23 are connected to the ends of the first reinforcing bars 22. The diameter of the intermediate rib 21 is larger than the diameter of the first reinforcing bars 22, and the diameter of the first reinforcing bars 22 is larger than the diameter of the second reinforcing bars 23. The outer circumferential surface of the intermediate rib 21 is provided with a first external thread 24. The fixing component 3 includes two fixing nuts 31, which are threaded to the first external thread 24. The two fixing nuts 31 abut against the left and right sides of the web of the steel arch frame 1, respectively. The intermediate rib 21 is fitted with a washer 32, which is located between the fixing nut 31 and the web of the steel arch frame 1.

[0029] In this embodiment, the model of the connecting rib 2 is selected according to the design drawings. Threads are made at both ends and in the middle. The thread length at both ends is 30mm and the thread length in the middle is 100mm. The washer 32 and the fixing nut 31 are matched with the connecting rib 2.

[0030] During installation, when the connecting bar 2 is inserted into the steel arch frame 1, the shim 32 and the fixing nut 31 are inserted from both ends of the connecting bar 2. Then, the two connecting bars 2 are aligned and the positions of the connecting bars 2 are adjusted left and right to make the two second reinforcing bars 23 fit together. Then, the fixing nut 31 is tightened until the shim 32 and the fixing nut 31 are tightly fitted against the web of the I-beam.

[0031] Example 3:

[0032] The basic content is the same as Example 2, except that:

[0033] See Figure 3 and Figure 4 The end of the second reinforcing bar 23 is provided with a second external thread 25. The connector 4 includes a sleeve 41, which is threaded to the second external threads 25 of two adjacent second reinforcing bars 23. The left and right sides of the sleeve 41 abut against limit nuts 42. The two limit nuts 42 are respectively threaded to the two second reinforcing bars 23. The outer diameter of the limit nuts 42 is smaller than the outer diameter of the sleeve 41. A third external thread 26 is provided on the second reinforcing bar 23 located on the right side of the sleeve 41. The third external thread 26 is located to the right of the second external thread 25 and the direction of rotation is opposite to that of the second external thread 25. The limit nut 42 located on the right side is threaded to the third external thread 26. A magnetic bubble 5 is connected to the outer peripheral surface of the sleeve 41 near the top.

[0034] In this embodiment, the sleeve 41 is made of stainless steel with a wall thickness of not less than 2mm and an inner diameter that matches the second reinforcing bar 23. When the two second reinforcing bars 23 are attached together and the magnetic bubble 5 is in a horizontal state, the two second reinforcing bars 23 are connected by rotating the sleeve 41. The lengths of the two second reinforcing bars 23 entering the sleeve 41 are the same. Then, the two limiting nuts 42 are tightened respectively so that the two limiting nuts 42 are attached to both ends of the sleeve 41. Then, the magnetic bubble 5 is placed horizontally on the sleeve 41 and observed whether the bubble is centered. If it is not centered, the position of the two connecting bars 2 is adjusted by loosening the fixing nut 31 so that the magnetic bubble 5 is centered. After being centered, the magnetic bubble 5 is removed and used on the next connecting bar 2.

Claims

1. A steel arch longitudinal connection device, characterized by: It includes multiple connecting ribs (2), and the multiple connecting ribs (2) are arranged one-to-one with multiple steel arch frames (1). The connecting ribs (2) are inserted into the web of the steel arch frame (1) through fixing components (3), and adjacent connecting ribs (2) are connected to each other through connectors (4).

2. A longitudinal connection device for steel arches as claimed in claim 1, characterized in that: The connecting bar (2) includes an intermediate bar (21), two first reinforcing bars (22) and two second reinforcing bars (23). The two first reinforcing bars (22) are connected to both ends of the intermediate bar (21), and the second reinforcing bars (23) are connected to the ends of the first reinforcing bars (22). The diameter of the intermediate bar (21) is larger than the diameter of the first reinforcing bars (22), and the diameter of the first reinforcing bars (22) is larger than the diameter of the second reinforcing bars (23).

3. A longitudinal connection device for steel arches as claimed in claim 2, characterized in that: The outer circumferential surface of the intermediate rib (21) is provided with a first external thread (24), and the fixing component (3) includes two fixing nuts (31). The two fixing nuts (31) are threadedly connected to the first external thread (24), and the two fixing nuts (31) respectively abut against the left and right sides of the web of the steel arch frame (1).

4. A longitudinal connection device for steel arches as claimed in claim 3, characterized in that: The intermediate rib (21) is fitted with a washer (32), which is located between the fixing nut (31) and the web of the steel arch frame (1).

5. A longitudinal connection device for steel arches as claimed in claim 2, characterized in that: The end of the second reinforcing bar (23) is provided with a second external thread (25), and the connector (4) includes a sleeve (41), which is threaded to the second external thread (25) of two adjacent second reinforcing bars (23).

6. A longitudinal connection device for steel arches as claimed in claim 5, characterized in that: The sleeve (41) is abutted against the left and right sides by limit nuts (42), and the two limit nuts (42) are respectively threaded to the two second steel bars (23).

7. A longitudinal connection device for steel arches as claimed in claim 6, characterized in that: The outer diameter of the limiting nut (42) is smaller than the outer diameter of the sleeve (41).

8. A longitudinal connection device for steel arches as claimed in claim 6, characterized in that: A third external thread (26) is provided on the second reinforcing bar (23) located on the right side of the sleeve (41). The third external thread (26) is located on the right side of the second external thread (25) and its direction of rotation is opposite to that of the second external thread (25). The limiting nut (42) located on the right side is threaded to the third external thread (26).

9. A longitudinal connection device for steel arches as claimed in claim 5, characterized in that: The sleeve (41) has a magnetic bubble (5) attached to its outer peripheral surface near the top.

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