Tunnel supporting structure

Abstract

The utility model relates to the technical field of tunnel supporting, in particular to a tunnel supporting structure which comprises a concentric-square-shaped support and an upper supporting plate, and the upper supporting plate is arranged above the concentric-square-shaped support. Supporting legs are fixed to the two sides of the lower end of the concentric-square-shaped support, side supporting plates are arranged on the outer sides of the supporting legs, at least two telescopic rods are connected between the side supporting plates and the adjacent supporting legs, and a tensioning driving assembly is arranged in the concentric-square-shaped support. A hydraulic cylinder and a plurality of telescopic shafts are connected between the upper supporting plate and the concentric-square-shaped support, positioning spine rods are fixed to the two sides of the upper end of the upper supporting plate, containing cavities are formed in the positioning spine rods, and transverse spine rods are arranged in the containing cavities; according to the supporting structure, the effect of supporting and protecting the two sides of the inner wall of the tunnel is achieved, the upper supporting plate is combined to abut against the inner top wall of the tunnel, and therefore the supporting effect of the supporting structure is effectively improved, the fixing effect of the supporting structure is improved, and the stability of supporting and protecting the tunnel by the supporting structure is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support, in particular to a tunnel support structure. Background Art

[0002] A tunnel is an engineering structure buried in the ground. It is a form of human utilization of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. Due to the particularity of the tunnel structure, support mechanisms are required to support the tunnel during tunnel construction.

[0003] For example, Chinese patent authorization announcement number CN214533032U discloses a karst tunnel support structure, including a base, a hydraulic rod fixedly installed on the upper surface of the base, a lifting rod fixedly installed on the end of the hydraulic rod away from the base, a support top fixedly installed on the end of the lifting rod away from the hydraulic rod, a fixing pin fixedly installed on the outer surface of the support top, a moving mechanism is arranged inside the base, an auxiliary mechanism is arranged between the inner walls of the support top, the moving mechanism includes a storage groove, a storage groove is provided on the lower surface of the base, a rectangular groove is symmetrically provided on the inner wall of the storage groove, a connecting rod is symmetrically fixedly installed on the outer surface of the hydraulic rod, and a disc is fixedly installed on the end of the connecting rod close to the storage groove. The utility model can effectively avoid the situation where the wheels are inconvenient to move due to poor construction environment by setting the moving mechanism, and at the same time, the wheels can be stored and protected during the support process, which greatly extends the service life of the wheels.

[0004] By referring to the above comparative documents, it can be seen that the prior art still has the following deficiencies: it can only support and protect the inner top wall of the tunnel, but lacks measures to support and protect the two inner walls of the tunnel, resulting in poor support and protection effects; and the support structure is only protected by inserting fixing needles into the geological layer from bottom to top, and the fixing needles may loosen up and down in the geological layer, resulting in an unsatisfactory fixing effect and an unstable support situation. Utility Model Content

[0005] The utility model provides a tunnel support structure, which is beneficial to ensuring the supporting and protecting effect of the support structure on the tunnel and improving the support stability.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A tunnel support structure, comprising a circular support and an upper support plate, wherein the upper support plate is arranged above the circular support;

[0008] Support legs are fixed on both sides of the lower end of the circular bracket, and side support plates are provided on the outer sides of the support legs. At least two telescopic rods are connected between the side support plates and the adjacent support legs, and a tensioning drive assembly is provided in the circular bracket;

[0009] A hydraulic cylinder and a plurality of telescopic shafts are connected between the upper support plate and the circular bracket. Positioning spike rods are fixed on both sides of the upper end of the upper support plate. Storage cavities are opened in the positioning spike rods. Transverse spike rods are arranged in the storage cavities, and push-pull drive components are arranged in the storage cavities.

[0010] Furthermore, the tensioning drive assembly includes a first forward and reverse motor, a main gear, a bidirectional screw, a sub-gear, a push plate and a push rod. The first forward and reverse motor is fixed to the top end of the circular bracket, and the main gear is connected to the power end of the first forward and reverse motor.

[0011] Furthermore, the bidirectional screw is rotatably connected in the circular bracket, and there are two push plates, which are distributed on the left and right and are threadedly sleeved with the bidirectional screw. There are two push rods, which are fixed one by one on the outside of the two push plates, and the push rods slide outward and pass through the circular bracket, and the side support plates are fixed to the ends of adjacent push rods.

[0012] Furthermore, a storage battery is installed in the circular bracket.

[0013] Furthermore, the push-pull drive components include a second forward and reverse motor, a one-way screw, a pressure plate and a guide shaft. The second forward and reverse motor is fixed in the storage cavity, one end of the one-way screw is connected to the power end of the second forward and reverse motor, and the other end of the one-way screw is rotatably connected to the inner wall of the storage cavity.

[0014] Furthermore, the pressure plate is threadedly sleeved on the outer periphery of the one-way screw rod, the guide shaft is fixed in the storage cavity, the pressure plate and the guide shaft are slidably sleeved, a through hole communicating with the storage cavity is opened on the outer side of the positioning spike rod, and the transverse spike rod corresponds to the through hole on the left and right.

[0015] Furthermore, a lighting lamp is installed in the middle of the lower end of the circular bracket.

[0016] Beneficial effects of the utility model:

[0017] 1. Through the work of the tensioning drive assembly, it is helpful to drive the side support plates to be tensioned on both sides of the inner wall of the tunnel, so as to achieve the effect of supporting and protecting both sides of the inner wall of the tunnel. Combined with the upper support plate to support the top wall of the tunnel, the support effect of the support structure is effectively improved;

[0018] 2. The support structure is protected by inserting the positioning spike rods from bottom to top into the geological layer of the tunnel top wall, and the push-pull drive assembly drives the transverse spike rods to be inserted transversely into the geological layer to prevent the positioning spike rods from loosening up and down in the geological layer, thereby improving the fixing effect of the support structure and effectively ensuring the stability of the support structure for tunnel support and protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 A is a schematic diagram of the enlarged structure of the local area of ​​the utility model;

[0021] Figure 3 The figure is a schematic diagram of the internal structure of the positioning spike rod of the utility model.

[0022] Description of reference numerals:

[0023] The circular bracket 1, the support leg 2, the side support plate 3, the telescopic rod 4, the lighting lamp 5, the push rod 6, the bidirectional screw 7, the push plate 8, the upper support plate 9, the hydraulic cylinder 10, the telescopic shaft 11, the positioning spike rod 12, the first forward and reverse motor 13, the main gear 14, the sub-gear 15, the battery 16, the guide shaft 17, the storage cavity 18, the through hole 19, the pressure plate 20, the second forward and reverse motor 21, the unidirectional screw 22, and the transverse spike rod 23. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0025] like Figure 1-2 As shown, in this embodiment, it includes a return bracket 1 and an upper support plate 9, the upper support plate 9 is arranged above the return bracket 1, and the two sides of the lower end of the return bracket 1 are fixed with support feet 2, and the outer sides of the support feet 2 are provided with side support plates 3, and the side support plates 3 are connected to the adjacent support feet 2 by at least two telescopic rods 4. The return bracket 1 is provided with a tensioning drive assembly, and the tensioning drive assembly includes a first forward and reverse motor 13, a main gear 14, a bidirectional screw rod 7, a sub-gear 15, a push plate 8 and a push rod 6. The first forward and reverse The motor 13 is fixed at the top end of the circular bracket 1, the main gear 14 is connected to the power end of the first forward and reverse motor 13, the bidirectional screw rod 7 is rotatably connected to the circular bracket 1, there are two push plates 8, and the two push plates 8 are distributed on the left and right and are threadedly sleeved with the bidirectional screw rod 7, there are two push rods 6 and they are fixed one by one on the outside of the two push plates 8, and the push rods 6 slide outward and pass through the circular bracket 1, the side support plates 3 are fixed to the ends of adjacent push rods 6, and a battery 16 is installed in the circular bracket 1.

[0026] When the tunnel is supported by the supporting structure, the first forward and reverse motor 13 is set to be electrically connected to the battery 16, and the first forward and reverse motor 13 is powered by the battery 16. Then, the main gear 14, the sub-gear 15, and the bidirectional screw 7 are driven to rotate by the operation of the first forward and reverse motor 13. The bidirectional screw 7 will drive the push plate 8 and the push rod 6 to move outward. At this time, the push rod 6 will push the side support plate 3 outward, and the side support plate 3 will stretch the telescopic rod 4 to ensure the stability of the side support plate 3 during movement, until the two side support plates 3 are tightened on both sides of the inner wall of the tunnel, which is conducive to achieving the effect of supporting and protecting both sides of the inner wall of the tunnel.

[0027] like Figure 1 As shown, in this embodiment, a hydraulic cylinder 10 and a plurality of telescopic shafts 11 are connected between the upper support plate 9 and the circular bracket 1, positioning spike rods 12 are fixed on both sides of the upper end of the upper support plate 9, and a storage cavity 18 is opened in the positioning spike rod 12, and a transverse spike rod 23 is provided in the storage cavity 18.

[0028] And the upper support plate 9 is pushed upward by the operation of the hydraulic cylinder 10, and at the same time the upper support plate 9 will stretch the telescopic shaft 11 to ensure the supporting stability of the upper support plate 9 until the upper support plate 9 supports the top wall of the tunnel. At this time, the upper support plate 9 will drive the positioning spike rod 12 to be inserted from bottom to top into the geological layer of the top wall of the tunnel, and combined with the side support plate 3 to support the inner wall of the protective tunnel, thereby effectively improving the support effect of the support structure.

[0029] like Figure 1 , 3 As shown, in this embodiment, a push-pull drive assembly is provided in the storage cavity 18, and the push-pull drive assembly includes a second forward and reverse motor 21, a one-way screw 22, a pressure plate 20 and a guide shaft 17. The second forward and reverse motor 21 is fixed in the storage cavity 18, one end of the one-way screw 22 is connected to the power end of the second forward and reverse motor 21, and the other end of the one-way screw 22 is rotatably connected to the inner wall of the storage cavity 18, the pressure plate 20 is threadedly sleeved on the outer periphery of the one-way screw 22, the guide shaft 17 is fixed in the storage cavity 18, the pressure plate 20 is slidably sleeved with the guide shaft 17, and a through hole 19 communicating with the storage cavity 18 is opened on the outside of the positioning spike rod 12, and the transverse spike rod 23 corresponds to the through hole 19 on the left and right.

[0030] When the positioning spike rod 12 is inserted into the geological layer of the top wall of the tunnel, the battery 16 is set to be electrically connected to the second forward and reverse motor 21, and the second forward and reverse motor 21 is powered by the battery 16. The operation of the second forward and reverse motor 21 drives the one-way screw 22 to rotate, and the one-way screw 22 will drive the push plate 8 to slide outward along the guide shaft 17. The push plate 8 will push the transverse spike rod 23 out of the through hole 19 until the transverse spike rod 23 is horizontally inserted into the geological layer, preventing the positioning spike rod 12 from loosening up and down in the geological layer, thereby improving the fixing effect of the support structure and effectively ensuring the stability of the support structure for supporting and protecting the tunnel.

[0031] like Figure 1 As shown, in this embodiment, a lighting lamp 5 is installed in the middle of the lower end of the circular bracket 1.

[0032] By installing the lighting lamp 5 in the middle of the lower end of the circular bracket 1 and setting the battery 16 in series with the lighting lamp 5, after the lighting lamp 6 is powered on, it is beneficial to illuminate the tunnel, thereby ensuring the normal progress of the tunnel construction.

[0033] All technical features in this embodiment can be freely combined according to actual needs.

[0034] The above embodiments are preferred implementation schemes of the present invention. In addition, other implementation schemes are also included. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A tunnel support structure, comprising a circular support (1) and an upper support plate (9), wherein the upper support plate (9) is arranged above the circular support (1), and is characterized in that: Support legs (2) are fixed on both sides of the lower end of the circular bracket (1), side support plates (3) are provided on the outer sides of the support legs (2), at least two telescopic rods (4) are connected between the side support plates (3) and adjacent support legs (2), and a tensioning drive assembly is provided inside the circular bracket (1); A hydraulic cylinder (10) and a plurality of telescopic shafts (11) are connected between the upper support plate (9) and the circular bracket (1); positioning spike rods (12) are fixed on both sides of the upper end of the upper support plate (9); a storage cavity (18) is opened in each of the positioning spike rods (12); a transverse spike rod (23) is arranged in each of the storage cavities (18); and a push-pull drive assembly is arranged in each of the storage cavities (18).

2. A tunnel support structure according to claim 1, characterized in that: The tensioning drive assembly comprises a first forward and reverse motor (13), a main gear (14), a bidirectional screw rod (7), a sub-gear (15), a push plate (8) and a push rod (6); the first forward and reverse motor (13) is fixed to the top end of the circular bracket (1); and the main gear (14) is connected to the power end of the first forward and reverse motor (13).

3. A tunnel support structure according to claim 2, characterized in that: The bidirectional screw (7) is rotatably connected to the circular bracket (1), and the push plates (8) are provided with two pieces, and the two push plates (8) are distributed on the left and right and are threadedly sleeved with the bidirectional screw (7). The push rods (6) are provided with two pieces and are fixed one by one on the outside of the two push plates (8), and the push rods (6) are slid outward and pass through the circular bracket (1), and the side support plates (3) are fixed to the ends of adjacent push rods (6).

4. A tunnel support structure according to claim 1, characterized in that: A storage battery (16) is installed in the circular bracket (1).

5. A tunnel support structure according to claim 1, characterized in that: The push-pull drive assembly comprises a second forward and reverse motor (21), a one-way screw rod (22), a pressure plate (20) and a guide shaft (17); the second forward and reverse motor (21) is fixed in the storage chamber (18); one end of the one-way screw rod (22) is connected to the power end of the second forward and reverse motor (21); and the other end of the one-way screw rod (22) is rotatably connected to the inner wall of the storage chamber (18).

6. A tunnel support structure according to claim 5, characterized in that: The pressure plate (20) is threadedly sleeved on the outer periphery of the one-way screw rod (22), the guide shaft (17) is fixed in the receiving cavity (18), the pressure plate (20) and the guide shaft (17) are slidably sleeved, the outer side of the positioning spike rod (12) is provided with a through hole (19) which is communicated with the receiving cavity (18), and the transverse spike rod (23) corresponds to the through hole (19) on the left and right.

7. A tunnel support structure according to claim 1, characterized in that: A lighting lamp (5) is installed in the middle of the lower end of the circular bracket (1).

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