A corrugated steel structure for tunnel lengthening

Abstract

This utility model relates to the field of tunnel support and protection technology. It provides a corrugated steel structure for tunnel extension, including a support frame with several support frames spaced apart along the tunnel axis; a first corrugated arch culvert disposed between two adjacent support frames and located on the inner peripheral wall of the support frame; a second corrugated arch culvert disposed between two adjacent support frames and located on the outer peripheral wall of the support frame; and a receiving space between the first and second corrugated arch culverts; and a steel reinforcement frame disposed within the receiving space, distributed along the tunnel's circumferential and / or axial direction, which supports the first and second corrugated arch culverts. This technical solution solves the technical problem that existing tunnel extension corrugated steel structures only provide limited support and rockfall prevention, failing to meet the requirements for long-term tunnel use.

Description

Technical Field

[0001] This utility model relates to the field of tunnel support and protection technology, specifically to a corrugated steel structure for tunnel extension. Background Technology

[0002] Corrugated steel structures for tunnels are mainly used as extension structures at tunnel entrances to prevent rockfalls, or as internal reinforcement within the tunnel. However, commonly used corrugated steel structures for tunnel extensions only provide limited support and rockfall prevention; their effectiveness is not good for long-term tunnel use and they cannot be used for an extended period. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a corrugated steel structure for tunnel extension, which solves the technical problem that the existing corrugated steel structure for tunnel extension can only play a certain role in supporting and preventing falling rocks, and cannot meet the needs of long-term tunnel use.

[0004] According to one aspect, at least one embodiment of the present invention provides a corrugated steel structure for tunnel extension, comprising:

[0005] The support frame has several components, and the several support frames are arranged at intervals along the tunnel axis;

[0006] The first corrugated arch culvert is disposed between two adjacent support frames and located on the inner peripheral wall of the support frame;

[0007] The second corrugated arch culvert is disposed between two adjacent support frames and located on the outer peripheral wall of the support frame, and there is an accommodating space between the first corrugated arch culvert and the second corrugated arch culvert;

[0008] A steel reinforcement frame is disposed within the accommodating space. The steel reinforcement frame is distributed along the circumferential and / or axial direction of the tunnel. The steel reinforcement frame is used to support the first corrugated arch culvert and the second corrugated arch culvert.

[0009] Optionally, the corrugation direction of the first corrugated arch culvert is perpendicular to the corrugation direction of the second corrugated arch culvert.

[0010] Optionally, the support frame includes:

[0011] The arched plate is detachably connected to the side wall of the first corrugated arch culvert;

[0012] A plurality of connecting strips are provided, and the plurality of connecting strips are arranged at intervals and detachably disposed between the arched plate and the side wall of the first corrugated arch culvert. The connecting strips are used to connect the arched plate and the first corrugated arch culvert.

[0013] Optional, also includes:

[0014] The I-beam is arched, and its axial direction is parallel to that of the first corrugated arch culvert. The I-beam is disposed on the inner peripheral wall of the first corrugated arch culvert and is used to support the first corrugated arch culvert.

[0015] Optionally, the first corrugated arch culvert includes:

[0016] The first corrugated plate has several of them, and the several first corrugated plates are spliced ​​end to end;

[0017] The flange is provided in a plurality of parts, each flange being disposed at the joint of two adjacent first corrugated plates, the two adjacent first corrugated plates being joined together by the flange.

[0018] Optionally, the second corrugated arch culvert includes:

[0019] The second corrugated plate has several of them, and the ends of the several second corrugated plates are spliced ​​together.

[0020] A connecting wing plate is disposed on the side wall of the second corrugated plate, and the second corrugated plate is detachably connected to the arched plate through the connecting wing plate.

[0021] Optional, also includes:

[0022] A plurality of shear studs are provided, one end of which is disposed through the first corrugated plate or the second corrugated plate, and the other end of each shear stud is connected to the steel reinforcement frame. The shear studs are used to reinforce the first corrugated plate and the second corrugated plate.

[0023] Optionally, a T-shaped steel is provided between the two first corrugated plates arranged along the tunnel axis, the T-shaped steel being used to connect the two first corrugated plates.

[0024] The beneficial effects of the embodiments of this utility model are as follows:

[0025] In this invention, the first corrugated arch culvert, the second corrugated arch culvert, and the support frame constitute a support unit. Multiple support units are combined to form an overall corrugated arch culvert structure. The second corrugated arch culvert is a small-wave corrugated plate, further enhancing the support and compressive strength. The corrugation length direction of the second corrugated arch culvert is perpendicular to that of the first corrugated arch culvert. Compared with conventional and unidirectional corrugated structures of the same length, this results in better stress distribution, stronger tensile strength, flexible stress resistance, and impact resistance, and better resistance to soil and rock pressure and rockfall impact. Concrete can be poured to fill the space, forming a composite support structure. The steel reinforcement frame within the space can distribute the load and extend the service life of the structure. The double-layer corrugated arch culvert, combined with the steel reinforcement frame and concrete, forms a three-dimensional support system, significantly improving compressive strength and solving the problem of insufficient support effect in traditional structures. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the device in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the local structure at point A in the middle;

[0029] Figure 3 This is a schematic diagram of the steel reinforcement frame in one embodiment of the present invention;

[0030] Figure 4 for Figure 3 A schematic diagram of the local structure at point B;

[0031] Figure 5 This is a schematic diagram of the connecting wing plate in this utility model.

[0032] In the diagram: 1. Support frame; 11. Arch plate; 12. Connecting strip; 2. First corrugated arch culvert; 21. First corrugated plate; 22. Flange; 3. Second corrugated arch culvert; 31. Second corrugated plate; 32. Connecting flange; 4. Accommodation space; 5. Reinforcing steel frame; 6. Shear stud; 7. Arc-shaped plate; 8. I-beam; 9. T-beam. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0034] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0035] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between 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.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0038] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] like Figures 1-5 As shown, a corrugated steel structure for tunnel extension according to an embodiment of the present invention is illustrated, comprising several supporting frames 1 and several steel structure frames arranged at intervals along the tunnel axis; a first corrugated arch culvert 2 is disposed between two adjacent supporting frames 1 and located on the inner peripheral wall of the supporting frame 1; a second corrugated arch culvert 3 is disposed between two adjacent supporting frames 1 and located on the outer peripheral wall of the supporting frame 1, and there is a receiving space 4 between the first corrugated arch culvert 2 and the second corrugated arch culvert 3; a steel reinforcement frame 5 is disposed in the receiving space 4, and the steel reinforcement frame 5 is distributed along the circumferential and / or axial direction of the tunnel, and the steel reinforcement frame 5 is used to support the first corrugated arch culvert 2 and the second corrugated arch culvert 3.

[0040] For example, such as Figure 1 and Figure 2As shown, the inner wall of each supporting frame 1 is fixed to the first corrugated arch culvert 2, and the outer wall is fixed to the second corrugated arch culvert 3. A receiving space 4 is formed between the first corrugated arch culvert 2 and the second corrugated arch culvert 3. The receiving space 4 is provided with steel reinforcement frames 5 distributed along the circumferential and / or axial directions of the tunnel. It should be noted that the steel reinforcement frames 5 can not only support the first corrugated arch culvert 2 and the second corrugated arch culvert 3, but also serve as a supporting skeleton when pouring concrete into the receiving space 4 later.

[0041] Specifically, the first corrugated arch culvert 2, the second corrugated arch culvert 3, and the supporting frame 1 form a supporting unit. Multiple supporting units are combined to form an overall corrugated arch culvert structure. The second corrugated arch culvert 3 is a corrugated plate with a small wave shape, which further improves the supporting and compressive strength effect.

[0042] During fabrication, the first corrugated arch culvert 2 is fixed to the inner wall of the supporting frame 1, and a steel reinforcement frame 5 is laid within the accommodating space 4. The second corrugated arch culvert 3 is fixed to the outer wall via connecting wing plates 32. During installation, the entire supporting frame 1 structure is installed inside the tunnel or at the tunnel entrance. It should be noted that, taking the tunnel entrance as an example, rockfalls often occur there, necessitating an "extension" of the tunnel entrance. This device can extend the tunnel entrance, keeping it as far away from falling rocks as possible. Concrete can be poured to fill the area, forming a composite support structure. The double-layer corrugated arch culvert, combined with the steel reinforcement frame 5 and concrete, forms a three-dimensional support system, significantly improving compressive strength and solving the problem of insufficient support effect in traditional structures. The steel reinforcement frame 5 within the accommodating space 4 can distribute the load, extending the structural service life.

[0043] In some examples, the corrugation direction of the first corrugated arch culvert 2 is perpendicular to the corrugation direction of the second corrugated arch culvert 3. Compared with conventional structures of the same corrugation length, this design can better distribute the stress, resulting in better compressive strength and stronger support. The perpendicular corrugation direction can distribute the stress in a cross manner, improving compressive strength compared to conventional unidirectional corrugated structures, and better resisting the pressure of surrounding soil and rockfalls.

[0044] In some examples, the support frame 1 includes an arched plate 11, which is detachably connected to the sidewall of the first corrugated arch culvert 2. Several connecting strips 12 are spaced apart and detachably disposed between the arched plate 11 and the sidewall of the first corrugated arch culvert 2. The connecting strips 12 connect the arched plate 11 and the first corrugated arch culvert 2. The spaced arrangement of the connecting strips 12 can evenly transfer the load, enhancing the connection stability between the support frame 1 and the corrugated arch culvert. Furthermore, the gap between adjacent connecting strips 12 facilitates concrete pouring.

[0045] In some examples, an I-beam 8 is also included. The I-beam 8 is arched and its axial direction is parallel to that of the first corrugated arch culvert 2. The I-beam 8 is disposed on the inner peripheral wall of the first corrugated arch culvert 2 and is used to support the first corrugated arch culvert 2.

[0046] For example, such as Figure 1 As shown, inside the first corrugated arch culvert 2, arched I-beams 8 are installed at regular intervals along the axial direction and fixed to the first corrugated plate 21 by bolts to form a support frame. The I-beams 8 enhance the deformation resistance of the first corrugated arch culvert 2, especially when the load inside the tunnel is large, they can prevent local collapse of the corrugated plate and improve the overall support strength.

[0047] In some examples, the first corrugated arch culvert 2 includes a number of first corrugated plates 21, which are spliced ​​end to end; and a number of flanges 22, each flange 22 being disposed at the splice of two adjacent first corrugated plates 21, and the two adjacent first corrugated plates 21 are spliced ​​together through the flanges 22.

[0048] For example, such as Figure 2 As shown, the flanges 22 of the first corrugated plate 21 are aligned and bolted together to form a continuous arched structure, which is then installed on the inner circumferential wall of the support frame 1. The flange 22 splicing also facilitates on-site assembly, adapts to different tunnel length requirements, and has high connection strength, ensuring the integrity of the structure.

[0049] In some examples, the second corrugated arch culvert 3 includes several second corrugated plates 31, which are spliced ​​end to end; connecting wing plates 32 are disposed on the side walls of the second corrugated plates 31, and the second corrugated plates 31 are detachably connected to the arch plate 11 through the connecting wing plates 32.

[0050] For example, such as Figure 5 As shown, the second corrugated plate 31 is spliced ​​together with flange 22 to form an outer corrugated arch culvert; the connecting flange 32 is aligned with the bolt holes on the arch plate 11 and fixed with bolts, so that the second corrugated arch culvert 3 is fixed to the outer peripheral wall of the support frame 1. The connecting flange 32 realizes the detachable connection between the second corrugated arch culvert 3 and the support frame 1, which facilitates the replacement of damaged parts in the future, while ensuring that the supporting force of the outer peripheral wall is transferred to the support frame 1. The modular design enables low-cost maintenance and replacement, effectively improving the problems of troublesome maintenance and difficulty in replacement of existing corrugated steel structures.

[0051] In some examples, several shear studs are also included. One end of the shear stud 6 is inserted through the first corrugated plate 21 or the second corrugated plate 31, and the other end of the shear stud 6 is connected to the steel reinforcement frame 5. The shear stud 6 is used to reinforce the first corrugated plate 21 and the second corrugated plate 31.

[0052] For example, such as Figure 3As shown, the shear stud 6 includes an arc-shaped piece 7, which covers the first corrugated plate 21 or the second corrugated plate 31. Taking the first corrugated plate 21 as an example, the arc of the arc-shaped piece 7 matches the arc of the trough of the first corrugated plate 21; the anchor rod is perpendicular to the first corrugated plate 21 and passes through the arc-shaped piece 7 and the first corrugated plate 21, and its passing end has threads. The arc-shaped piece 7 and the first corrugated plate 21 have threaded holes that match the passing end; the stiffener is a fan-shaped structure fixed to one side of the anchor rod, and its arc edge contacts the arc-shaped piece 7 and matches the arc shape of the contact part; one of its straight edges is fixed to the anchor rod along the length direction of the anchor rod; the nut matches the thread of the passing end of the anchor rod, and it is sleeved on the passing end of the anchor rod and contacts and locks the first corrugated plate 21.

[0053] When installing shear studs, firstly, the curved plate 7 is placed on the first corrugated plate 21. The anchor rod, with welded reinforcing plates, is then passed through the curved plate 7 and the first corrugated plate 21 and locked with a nut. During the locking process, the reinforcing plates gradually press against the curved plate 7, ensuring complete contact between the curved plate 7 and the first corrugated plate 21. Finally, the contact surfaces of the reinforcing plates and the curved plate 7 are welded together to completely fix the three components. Double-sided welding is used during installation. Applying sealant to the curved plate 7 during installation effectively seals and prevents leakage.

[0054] In some examples, a T-shaped steel 9 is provided between two first corrugated plates 21 arranged along the tunnel axis, and the T-shaped steel 9 is used to connect the two first corrugated plates 21.

[0055] For example, such as Figure 1 As shown, at the circumferential splice of the first corrugated arch culvert 2, the web of the T-shaped steel 9 is embedded in the corrugated gap, and the flange is fixed to the flange 22 of the corrugated plates on both sides with bolts. A sealing strip can be installed on the contact surface. The T-shaped steel 9 not only connects the adjacent first corrugated plates 21 and improves the strength of the splice, but also enhances the sealing performance through the sealing strip, preventing groundwater or falling rocks from entering and extending the service life of the structure.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this 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 be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A corrugated steel structure for tunnel extension, characterized in that, include: The support frame (1) has several of them, and the several support frames (1) are arranged at intervals along the tunnel axis; The first corrugated arch culvert (2) is disposed between two adjacent support frames (1) and located on the inner peripheral wall of the support frame (1); The second corrugated arch culvert (3) is disposed between two adjacent support frames (1) and on the outer peripheral wall of the support frame (1), and there is a accommodating space (4) between the first corrugated arch culvert (2) and the second corrugated arch culvert (3). A steel reinforcement frame (5) is provided in the accommodating space (4). The steel reinforcement frame (5) is distributed along the circumferential and / or axial direction of the tunnel. The steel reinforcement frame (5) is used to support the first corrugated arch culvert (2) and the second corrugated arch culvert (3).

2. The corrugated steel structure for tunnel extension according to claim 1, characterized in that, The corrugated direction of the first corrugated arch culvert (2) is perpendicular to the corrugated direction of the second corrugated arch culvert (3).

3. The corrugated steel structure for tunnel extension according to claim 1, characterized in that, The supporting framework (1) includes: The arched plate (11) is detachably connected to the side wall of the first corrugated arch culvert (2); A plurality of connecting strips (12) are arranged at intervals and detachably disposed between the arch plate (11) and the side wall of the first corrugated arch culvert (2). The connecting strips (12) are used to connect the arch plate (11) and the first corrugated arch culvert (2).

4. The corrugated steel structure for tunnel extension according to claim 1, characterized in that, Also includes: The I-beam (8) is arched and its axial direction is parallel to that of the first corrugated arch culvert (2). The I-beam (8) is set on the inner circumferential wall of the first corrugated arch culvert (2) and is used to support the first corrugated arch culvert (2).

5. A corrugated steel structure for tunnel extension according to claim 3, characterized in that, The first corrugated arch culvert (2) includes: The first corrugated plate (21) has several of them, and the first corrugated plate (21) is spliced ​​end to end; The flange (22) has several, and each flange (22) is disposed at the splice of two adjacent first corrugated plates (21), and the two adjacent first corrugated plates (21) are spliced ​​through the flange (22).

6. A corrugated steel structure for tunnel extension according to claim 5, characterized in that, The second corrugated arch culvert (3) includes: The second corrugated plate (31) has several of them, and the several second corrugated plates (31) are spliced ​​end to end; A connecting wing plate (32) is disposed on the side wall of the second corrugated plate (31), and the second corrugated plate (31) is detachably connected to the arched plate (11) through the connecting wing plate (32).

7. A corrugated steel structure for tunnel extension according to claim 6, characterized in that, Also includes: Shear studs (6) are provided in several units. One end of the shear studs (6) is inserted through the first corrugated plate (21) or the second corrugated plate (31), and the other end of the shear studs (6) is connected to the steel reinforcement frame (5). The shear studs (6) are used to reinforce the first corrugated plate (21) and the second corrugated plate (31).

8. A corrugated steel structure for tunnel extension according to claim 5, characterized in that, A T-shaped steel (9) is provided between two first corrugated plates (21) arranged along the tunnel axis, the T-shaped steel (9) being used to connect the two first corrugated plates (21).

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