A tunnel corrugated steel combined support connecting joint structure

Abstract

The utility model discloses a tunnel corrugated steel combined support connecting joint structure belongs to tunnel corrugated steel support technical field, including front cycle corrugated steel sheet, front end flange, rear cycle corrugated steel sheet and rear end flange, a plurality of threaded bushings are fixedly connected on the front end flange, threaded bushing corresponds with non temporary side bolt hole, a plurality of L type openings and bolt holes are seted up on the rear end flange, after the anchor rod is passed through L type opening, non temporary side bolt hole and is connected with threaded bushing threadedly, the end face of front end flange away from front cycle corrugated steel sheet is bonded with temporary foam board, and the initial support injection concrete is constructed in the top of temporary foam board, after removing temporary foam board, high -strength bolt passes through bolt hole, temporary side bolt hole and is connected together with the nut after the front end flange and rear end flange. The utility model strengthens the longitudinal connection of tunnel corrugated steel combined support splicing joint, improves joint connecting strength, and improves construction safety and construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tunnel corrugated steel support technology, and in particular to a tunnel corrugated steel composite support connection joint structure. Background Technology

[0002] Traditional tunnel lining consists of initial support and secondary lining, involving complex construction procedures, requiring a large number of workers to be exposed to harsh environments, and necessitating extensive concrete work. Once cracks appear in the structure, it often requires operation with the cracks present, compromising structural safety. Corrugated steel, as a tough structural material, possesses excellent resistance to deformation and stiffness, and can be prefabricated in factories for on-site mechanical assembly. Therefore, it has been widely adopted in underground engineering.

[0003] In tunnel engineering applications, existing corrugated steel plates are mostly connected and fixed using high-strength bolts and flanges to form corrugated steel arches. However, the joints of the corrugated steel arches rely solely on bolts on the inner side of the corrugated steel, leading to poor joint strength and affecting the overall joint strength. Furthermore, grouting is used to fill the space between the corrugated steel arch and the tunnel wall to form an integral structure. However, due to the unevenness of the tunnel wall, gaps may appear between the corrugated steel arch and the tunnel wall at the end of each grouting cycle, causing grout leakage.

[0004] To enhance the strength of corrugated steel arch connection joints and avoid grout leakage problems behind the corrugated steel arches, this utility model provides a tunnel corrugated steel composite support connection joint structure. It utilizes anchor rods to strengthen the longitudinal connection joints, enhance the connectivity of the front and rear circulating corrugated steel arches, improve overall integrity, and provide temporary fixation when splicing corrugated steel arches, thereby improving construction safety and efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a connection joint structure for corrugated steel composite support in tunnels. This connection joint structure can strengthen the longitudinal connection of the assembled joints of corrugated steel composite support in tunnels, improve the connection strength of the joints, and at the same time, by combining flanges, initial support shotcrete, and temporary foam boards to form end sealing, it solves the problem of grout leakage behind the corrugated steel structure in a localized manner, thereby improving construction efficiency.

[0006] To achieve the above objectives, this utility model provides a tunnel corrugated steel composite support connection joint structure, including a front circulating corrugated steel plate, a front flange, a rear circulating corrugated steel plate and a rear flange. One end of the front circulating corrugated steel plate is fixedly connected to the end face of the front flange, and one end of the rear circulating corrugated steel plate is fixedly connected to the end face of the rear flange.

[0007] The front flange has multiple bolt holes on the air-exposed side and multiple bolt holes on the non-air-exposed side. Multiple threaded sleeves are fixedly connected to the front flange, and the threaded sleeves correspond to the bolt holes on the non-air-exposed side.

[0008] The rear flange has multiple L-shaped openings and multiple bolt holes. The anchor rod passes through the L-shaped openings and the bolt holes on the non-free side and is then threadedly connected to the threaded sleeve.

[0009] A temporary foam board is bonded to the end face of the front flange away from the front circulation corrugated steel plate, and initial support shotcrete is constructed above the temporary foam board.

[0010] After removing the temporary foam board, high-strength bolts are used to pass through the bolt holes and the bolt holes on the free side, and then nuts are used to connect the front flange and the rear flange together.

[0011] Preferably, a plurality of stiffening ribs are fixedly connected between the end face of the front flange and the front circulating corrugated steel plate, and the stiffening ribs are spaced apart along the long side of the front flange, and the thickness of the stiffening ribs is not less than the thickness of the front flange.

[0012] Preferably, a plurality of stiffening ribs are fixedly connected between the end face of the rear flange and the rear circulating corrugated steel plate, and the stiffening ribs are spaced apart along the long side of the rear flange, and the thickness of the stiffening ribs is not less than the thickness of the rear flange.

[0013] Preferably, a waterproof sealing gasket is provided between the front flange and the rear flange after the temporary foam board is removed.

[0014] Preferably, the width of the temporary foam board is the same as the width of the rear flange. The temporary foam board temporarily seals the threaded sleeve, the bolt hole on the free side, and the bolt hole on the non-free side to prevent the threaded sleeve, the bolt hole on the free side, and the bolt hole on the non-free side from being blocked by the initial support shotcrete.

[0015] Preferably, the width of the L-shaped opening matches the diameter of the anchor rod, and the tail of the anchor rod is bent.

[0016] Preferably, the width of the rear flange is not greater than the width of the front flange.

[0017] Preferably, the plurality of free-side bolt holes and non-free-side bolt holes are spaced apart along the long side of the front flange; the plurality of L-shaped openings and bolt holes are spaced apart along the long side of the rear flange.

[0018] The advantages and positive effects of the tunnel corrugated steel composite support connection joint structure described in this utility model are:

[0019] (1) By using the anchoring effect of the anchor rod, the strength and integrity of the joint of the front and rear circulating corrugated steel composite structure are improved.

[0020] (2) By using the front flange and initial support shotcrete to form a sealing end, no additional measures are required, which effectively solves the problem of grout leakage behind the corrugated steel.

[0021] (3) By using removable temporary foam boards, the initial support shotcrete is prevented from adhering to the threaded sleeve, bolt holes on the free side and bolt holes on the non-free side, thus affecting the flange splicing effect.

[0022] (4) The L-shaped opening, in conjunction with the anchor rod, serves as a temporary fixation during the assembly of the corrugated steel plate, eliminating the need for additional temporary support measures for the corrugated steel plate.

[0023] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a tunnel corrugated steel composite support connection joint structure according to the present invention;

[0025] Figure 2 This is a perspective view of the connection structure between the front flange and the front circulation corrugated steel of this utility model;

[0026] Figure 3 This is a front view of the connection structure between the front flange and the front circulating corrugated steel of this utility model;

[0027] Figure 4 This is a perspective view of the connection structure between the rear flange and the rear circulation corrugated steel of this utility model;

[0028] Figure 5 This is a construction process diagram of this utility model.

[0029] Figure Labels

[0030] 1. Front circulation corrugated steel plate; 2. Front flange; 21. Bolt holes on the open side; 22. Bolt holes on the non-open side; 23. Stiffening rib one;

[0031] 3. Threaded sleeve; 4. Rear circulation corrugated steel plate; 5. Rear flange; 51. L-shaped opening; 52. Bolt hole; 53. Stiffening rib II;

[0032] 6. Anchor bolts; 7. High-strength bolts; 8. Initial support shotcrete; 9. Waterproof sealing gaskets; 10. Temporary foam boards. Detailed Implementation

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1-5 As shown, a tunnel corrugated steel composite support connection joint structure includes a front circulating corrugated steel plate 1, a front flange 2, a rear circulating corrugated steel plate 4, and a rear flange 5. One end of the front circulating corrugated steel plate 1 is fixedly connected to the end face of the front flange 2, and one end of the rear circulating corrugated steel plate 4 is fixedly connected to the end face of the rear flange 5.

[0037] Specifically, the front circulating corrugated steel plate 1 is connected to the front flange 2 by welding, and the rear circulating corrugated steel plate 4 is connected to the rear flange 5 by welding.

[0038] The front flange 2 has multiple bolt holes 21 on the air-exposed side and multiple bolt holes 22 on the non-air-exposed side. Multiple threaded sleeves 3 are fixedly connected to the front flange 2, and the threaded sleeves 3 correspond to the bolt holes 22 on the non-air-exposed side.

[0039] Specifically, the threaded sleeve 3 is connected to the front flange 2 by welding.

[0040] The rear flange 5 has multiple L-shaped openings 51 and multiple bolt holes 52. The anchor rod 6 passes through the L-shaped openings 51 and the bolt holes 22 on the non-free side and is then threadedly connected to the threaded sleeve 3.

[0041] A temporary foam board 10 is adhered to the end face of the front flange 2 away from the front circulation corrugated steel plate 1. Specifically, the temporary foam board 10 is removed after the initial support shotcrete 8 is completed to ensure that the end face of the front flange 2 is clean, and to prevent the threaded sleeve 3 from being blocked during the initial support shotcrete 8 construction, which would affect the installation of the anchor rod 6 and the front flange 2.

[0042] The initial support shotcrete 8 is constructed above the temporary foam board 10.

[0043] After removing the temporary foam board 10, the high-strength bolts 7 pass through the bolt holes 52 and the bolt holes 21 on the free side, and then the front flange 2 and the rear flange 5 are connected together with nuts.

[0044] Multiple stiffening ribs 23 are fixedly connected between the end face of the front flange 2 and the front circulating corrugated steel plate 1, and the stiffening ribs 23 are spaced apart along the long side of the front flange 2. The thickness of the stiffening ribs 23 is not less than the thickness of the front flange 2 to avoid buckling that would affect the reinforcement effect.

[0045] Multiple stiffening ribs 53 are fixedly connected between the end face of the rear flange 5 and the rear circulating corrugated steel plate 4, and the stiffening ribs 53 are spaced apart along the long side of the rear flange 5. The thickness of the stiffening ribs 53 is not less than the thickness of the rear flange 5 to avoid buckling that would affect the reinforcement effect.

[0046] A waterproof sealing gasket 9 is installed between the front flange 2 and the rear flange 5 after the temporary foam board 10 is removed.

[0047] The width of the temporary foam board 10 is the same as the width of the rear flange 5. The temporary foam board 10 can temporarily seal the threaded sleeve 3, the bolt hole 21 on the free side, and the bolt hole 22 on the non-free side to prevent the threaded sleeve 3, the bolt hole 21 on the free side, and the bolt hole 22 on the non-free side from being blocked during the construction of the initial support shotcrete 8.

[0048] The width of the L-shaped opening 51 matches the diameter of the anchor rod 6. The tail of the anchor rod 6 is bent to improve the anchoring effect of the anchor rod 6 when grouting behind the corrugated steel.

[0049] Specifically, the anchor rod 6 can temporarily fix the corrugated steel plate when the high-strength bolts 7 are not installed on the corrugated steel plate.

[0050] The width of the rear flange 5 is not greater than the width of the front flange 2, which facilitates the effective bonding of the initial support shotcrete 8 to the front flange 2 and improves the sealing effect between the initial support shotcrete 8 and the front flange 2.

[0051] Multiple bolt holes 21 on the air-exposed side and bolt holes 22 on the non-air-exposed side are spaced apart along the long side of the front flange 2.

[0052] Multiple L-shaped openings 51 and bolt holes are spaced apart along the long side of the rear flange 5.

[0053] The process of using this utility model includes the following steps:

[0054] Step one: After erecting and assembling the front circulating corrugated steel plate 1, construct the initial support sprayed concrete 8, i.e. Figure 5 (a) and Figure 5 (b).

[0055] Step two: Remove the temporary foam board 10 from the front flange 2, and tightly attach the waterproof sealing gasket 9 to the end face of the front flange 2 away from the front circulation corrugated steel plate 1. Then, screw the anchor rod 6 so that the end of the anchor rod 6 passes through the bolt hole 22 on the non-free-air side and enters the threaded sleeve 3 for threaded connection. Figure 5 (c);

[0056] Step 3: Press the L-shaped opening 51 of the rear circulating corrugated steel plate 4 tightly against the anchor rod 6, and simultaneously push the rear circulating corrugated steel plate 4 to slide along the path of the L-shaped opening 51, so that the anchor rod 6 reaches the top of the L-shaped opening 51. Afterwards, use high-strength bolts 7 to tighten the front flange 2, waterproof gasket 9, and rear flange 5. Figure 5 (d).

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A tunnel corrugated steel composite support connection joint structure, characterized in that: It includes a front circulating corrugated steel plate, a front flange, a rear circulating corrugated steel plate, and a rear flange. One end of the front circulating corrugated steel plate is fixedly connected to the end face of the front flange, and one end of the rear circulating corrugated steel plate is fixedly connected to the end face of the rear flange. The front flange has multiple bolt holes on the air-exposed side and multiple bolt holes on the non-air-exposed side. Multiple threaded sleeves are fixedly connected to the front flange, and the threaded sleeves correspond to the bolt holes on the non-air-exposed side. The rear flange has multiple L-shaped openings and multiple bolt holes. The anchor rod passes through the L-shaped openings and the bolt holes on the non-free side and is then threadedly connected to the threaded sleeve. A temporary foam board is bonded to the end face of the front flange away from the front circulation corrugated steel plate, and initial support shotcrete is constructed above the temporary foam board. After removing the temporary foam board, high-strength bolts are used to pass through the bolt holes and the bolt holes on the free side, and then nuts are used to connect the front flange and the rear flange together.

2. The tunnel corrugated steel composite support connection joint structure according to claim 1, characterized in that: Multiple stiffening ribs are fixedly connected between the end face of the front flange and the front circulating corrugated steel plate, and the stiffening ribs are spaced apart along the long side of the front flange. The thickness of the stiffening ribs is not less than the thickness of the front flange.

3. The tunnel corrugated steel composite support connection joint structure according to claim 2, characterized in that: Multiple stiffening ribs are fixedly connected between the end face of the rear flange and the rear circulating corrugated steel plate, and the stiffening ribs are spaced apart along the long side of the rear flange. The thickness of the stiffening ribs is not less than the thickness of the rear flange.

4. The tunnel corrugated steel composite support connection joint structure according to claim 3, characterized in that: A waterproof sealing gasket is installed between the front flange and the rear flange after the temporary foam board is removed.

5. The tunnel corrugated steel composite support connection joint structure according to claim 4, characterized in that: The width of the temporary foam board is the same as the width of the rear flange. The temporary foam board temporarily seals the threaded sleeve, the bolt hole on the free side, and the bolt hole on the non-free side to prevent the threaded sleeve, the bolt hole on the free side, and the bolt hole on the non-free side from being blocked by the initial support shotcrete.

6. The tunnel corrugated steel composite support connection joint structure according to claim 1, characterized in that: The width of the L-shaped opening matches the diameter of the anchor rod, and the tail of the anchor rod is bent.

7. The tunnel corrugated steel composite support connection joint structure according to claim 1, characterized in that: The width of the rear flange is not greater than the width of the front flange.

8. The tunnel corrugated steel composite support connection joint structure according to claim 1, characterized in that: Multiple bolt holes on the free side and bolt holes on the non-free side are spaced apart along the long side of the front flange; multiple L-shaped openings and bolt holes are spaced apart along the long side of the rear flange.

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