Temporary tunnel support device

Abstract

The embodiment of the present invention provides a temporary tunnel support device, which relates to the technical field of tunnel construction. It includes a top guard plate, a left side guard plate and a right side guard plate, the left side guard plate and the right side guard plate are respectively located on opposite sides of the top guard plate, a first drive unit is installed between the top guard plate and the left side guard plate, and a second drive unit is installed between the top guard plate and the right side guard plate, and under the action of the first drive unit and the second drive unit, the top guard plate, the left side guard plate and the right side guard plate abut against the tunnel surrounding rock. In the temporary tunnel support device provided by the present invention, under the drive of the first drive unit and the second drive unit, the spacing between the top guard plate and the left side guard plate increases, and the spacing between the top guard plate and the right side guard plate increases, so that the three guard plates abut against the tunnel surrounding rock respectively; compared with the traditional support device, in addition to the top guard plate that provides support for the top guard plate, a left side guard plate and a right side guard plate are also provided, thereby improving the safety of protection.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of tunnel construction, and in particular to a temporary tunnel support device. Background Art

[0002] In order to avoid empty top operation, tunnel excavation requires temporary support immediately after the cross section is formed to prevent broken gangue from falling and injuring people. With the increasing difficulty of tunnel support, temporary support devices that can exert active support force on the surrounding rock and suppress discontinuous and harmful deformation of the surrounding rock in the early stage of excavation have gradually been developed in recent years.

[0003] At present, the common temporary support methods are front exploration beam temporary support and step-by-step temporary support bracket: the former is to manually move the front exploration beam forward after the tunnel section is formed to temporarily support the exposed top guard plate formed by the new excavation. The mechanization degree is low and the temporary support effect is poor. It can only play the role of blocking the falling of gangue, and cannot actively support the surrounding rock; the latter is generally composed of a group of brackets consisting of two front and rear brackets and a hydraulic cylinder connecting the brackets. Its working process is that the rear frame is supported, the hydraulic cylinder is extended, and the front frame is pushed forward. The front frame is supported, the rear frame is lowered, and the hydraulic cylinder is contracted, dragging the rear frame forward, thereby realizing the step-by-step advancement of the front and rear brackets. In the process of stepping forward, the top guard plate needs to be repeatedly supported, which greatly damages the integrity of the top guard plate. In addition, in these two commonly used methods, only the top guard plate is supported, and the pressure of the tunnel surrounding rock is limited, which is prone to rock fragmentation and injury accidents, and the protection is poor. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The purpose of the present invention is to provide a temporary tunnel supporting device to solve the problem of poor protection of the existing supporting device.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a temporary support device for a tunnel, comprising a top guard plate, a left side guard plate and a right side guard plate, wherein the left side guard plate and the right side guard plate are respectively located on opposite sides of the top guard plate, a first driving unit is installed between the top guard plate and the left side guard plate, and a second driving unit is installed between the top guard plate and the right side guard plate, and under the action of the first driving unit and the second driving unit, the top guard plate, the left side guard plate and the right side guard plate are abutted against the surrounding rock of the tunnel.

[0008] Among them, there are multiple top guard plates, left side guard plates and right side guard plates, and the top guard plates, the left side guard plates and the right side guard plates are all arranged in one-to-one correspondence. Multiple left side guard plates are connected in sequence, and multiple right side guard plates are connected in sequence. Push-pull drive units are respectively installed between two adjacent left side guard plates and between two adjacent right side guard plates.

[0009] Wherein, the push-pull drive unit is a bidirectional oil cylinder.

[0010] Wherein, flexible crawlers are respectively installed on the sides of the top guard plate, the left side guard plate and the right side guard plate facing the tunnel.

[0011] Among them, the top guard plate, the left side guard plate and the right side guard plate are respectively provided with a plurality of rollers, and the flexible crawler is respectively installed on the top guard plate, the left side guard plate and the right side guard plate through the corresponding plurality of rollers.

[0012] Wherein, the first drive unit and the second drive unit are both bidirectional cylinders, the two output ends of the first drive unit are respectively hinged to the top guard plate and the left side guard plate, and the two output ends of the second drive unit are respectively hinged to the top guard plate and the right side guard plate.

[0013] Among them, the first driving unit includes two first oil cylinders, one end of one of the first oil cylinders is connected to the top of the left guard plate, and the other end is connected to the end of the top guard plate close to the right guard plate, and one end of the other first oil cylinder is connected to the bottom of the left guard plate, and the other end is connected to the end of the top guard plate close to the left guard plate. The two first oil cylinders are arranged front and back along the direction of the left guard plate parallel to the length of the tunnel.

[0014] Among them, the second driving unit includes two second oil cylinders, one end of one of the second oil cylinders is connected to the top of the right protective plate, and the other end is connected to the end of the top protective plate close to the left protective plate, and one end of the other second oil cylinder is connected to the bottom of the right protective plate, and the other end is connected to the end of the top protective plate close to the right protective plate. The two second oil cylinders are arranged front and back along the direction of the right protective plate parallel to the length of the tunnel.

[0015] Wherein, a support driving unit is respectively installed at the lower end of the left guard plate and the lower end of the right guard plate.

[0016] (III) Beneficial effects

[0017] The temporary tunnel support device provided by the present invention, under the drive of the first drive unit and the second drive unit, the distance between the top guard plate and the left side guard plate increases, and the distance between the top guard plate and the right side guard plate increases, so that the three guard plates are respectively abutted against the surrounding rock of the tunnel; compared with the traditional support device, in addition to the top guard plate that provides top guard plate support, left side guard plates and right side guard plates are also provided, which improves the safety of protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a temporary tunnel support device according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 The right side view of the temporary support device of the tunnel shown;

[0020] Figure 3 for Figure 1 A partial structural schematic diagram of a temporary tunnel support device shown in FIG.

[0021] Figure 4 for Figure 1 Another partial structural schematic diagram of the temporary tunnel support device shown in .

[0022] In the figure: 10, top guard plate; 20, left side guard plate; 30, right side guard plate; 31, first drive unit; 32, second drive unit; 40, push-pull drive unit; 50, flexible crawler; 60, roller; 70, support drive unit; 80, control system. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The temporary tunnel support device in the embodiment of the present invention is as follows: Figure 1As shown, it includes a top guard plate 10, a left side guard plate 20 and a right side guard plate 30, wherein the left side guard plate 20 is arranged on one of the two opposite sides of the top guard plate 10, and the right side guard plate 30 is arranged on the other side, a first driving unit 31 is installed between the top guard plate 10 and the left side guard plate 20, and a second driving unit 32 is installed between the top guard plate 10 and the right side guard plate 30, and the first driving unit 31 and the second driving unit 32 cooperate with each other to drive the top guard plate 10, the left side guard plate 20 and the right side guard plate 30 to abut against the surrounding rock, thereby forming support in the tunnel. Wherein, under the drive of the first driving unit 31 and the second driving unit 32, the distance between the top guard plate 10 and the left side guard plate 20 increases, and the distance between the top guard plate 10 and the right side guard plate 30 increases, so that the three guard plates are respectively abutted against the surrounding rock of the tunnel. Compared with the traditional supporting device, in addition to the top guard plate 10 providing top support, a left side guard plate 20 and a right side guard plate 30 are also provided, which improves the safety of protection.

[0026] Specifically, Figure 2 As shown, there are multiple top guard plates 10, left guard plates 20 and right guard plates 30, which are arranged one by one to form multiple groups of support components, that is, the number of the three is the same, wherein each group of support components includes a top guard plate 10, a left guard plate 20 and a right guard plate 30, multiple left guard plates 20 are connected in sequence, multiple right guard plates 30 are connected in sequence, and push-pull drive units 40 are installed between two adjacent left guard plates 20 and between two adjacent right guard plates 30. It should be noted that in order to adapt to the multiple left guard plates 20 and the right guard plates 30, the first drive unit 31 and the second drive unit 32 are also arranged in plurality. Preferably, the push-pull drive unit 40 is a bidirectional oil cylinder; of course, it can also be a plurality of unidirectional oil cylinders, and the plurality of unidirectional oil cylinders cooperate with each other to achieve the effect of a bidirectional oil cylinder.

[0027] During use, when one group of support components is in contact with the tunnel surrounding rock and is in a supporting state, the first drive unit 31 and the second drive unit 32 in the other support components cooperate to make each guard plate in a state of being out of contact with the tunnel surrounding rock. At this time, the push-pull drive unit 40 can drive the groups of support components in the out of contact state to move away from or close to the support components in the supporting state; when the movement of other groups is adjusted into place under the action of the push-pull drive unit 40, the first drive unit 31 and the second drive unit 32 cooperate with each other to realize the contact between each guard plate and the tunnel surrounding rock, and the support components originally in the supporting state are out of contact, and the position adjustment is realized by pushing and pulling the push-pull drive unit 40. The support device can move in the tunnel along the length direction of the tunnel through the cooperation between the groups of support components and the push-pull drive unit 40.

[0028] In addition, in order to reduce the degree of damage to the guard plate during the repeated support and disengagement process, flexible tracks 50 are respectively installed on the top guard plate 10, the left guard plate 20 and the right guard plate 30 facing the tunnel surrounding rock. Specifically, a plurality of rollers 60 are respectively provided on the top guard plate 10, the left guard plate 20 and the right guard plate 30. The plurality of rollers 60 can be arranged at intervals or in parallel and in contact with each other. The flexible track 50 arranged on the top guard plate 10 is installed on the top guard plate 10 through the plurality of rollers 60 on the top guard plate 10; similarly, the flexible track 50 arranged on the left guard plate 20 is installed on the left guard plate 20 through the plurality of rollers 60 on the left guard plate 20; the flexible track 50 arranged on the right guard plate 30 is installed on the right guard plate 30 through the plurality of rollers 60 on the right guard plate 30. Specifically, the flexible track 50 can be made of a soft material such as rubber.

[0029] Among them, a plurality of rollers 60 located on the top guard plate 10 extend in the width direction of the tunnel, and a plurality of rollers 60 located on the left side guard plate 20 and the right side guard plate 30 extend in the depth direction of the tunnel. When the top guard plate 10, the left side guard plate 20 and the right side guard plate 30 move in the length direction of the tunnel, the flexible crawler 50 flexibly contacts the surrounding rock of the tunnel, and directly slides forward under the action of the rollers 60 without disengaging from the contact, thereby effectively preventing the top guard plate 10, the left side guard plate 20 and the right side guard plate 30 from being damaged during repeated support. It should be noted that when there is only one set of support components, the forward movement in the length direction of the tunnel can be achieved with the help of an external traction device; when there are multiple sets of support components, the temporary support device of the tunnel can be moved under pressure by the push-pull drive unit 40.

[0030] In the embodiment of the present invention, the first drive unit 31 and the second drive unit 32 are both bidirectional oil cylinders. The two output ends of the first drive unit 31 are respectively hinged to the top guard plate 10 and the left side guard plate 20, and the two output ends of the second drive unit 32 are respectively hinged to the top guard plate 10 and the right side guard plate 30. Under the control of the control system, the output ends of the bidirectional oil cylinders are retracted or pushed outward, so as to realize the position adjustment of each guard plate in the circumferential direction of the tunnel; in addition, the bidirectional oil cylinders also play the role of providing support force to ensure effective support.

[0031] In order to further improve the safety of the support, preferably, the first drive unit 31 includes two first oil cylinders, one end of one of the first oil cylinders is connected to the top of the left guard plate 20, and the other end is connected to the end of the top guard plate 10 close to the right guard plate 30, and one end of the other first oil cylinder is connected to the bottom of the left guard plate 20, and the other end is connected to the end of the top guard plate 10 close to the left guard plate 20, and the two first oil cylinders are arranged front and back along the direction of the left guard plate 20 parallel to the length of the lane. Of course, the number of the first oil cylinders can also be three or four, which is not specifically limited in the embodiment of the present invention.

[0032] Similarly, the second drive unit 32 includes two second oil cylinders, one end of one of the second oil cylinders is connected to the top of the right guard plate 30, and the other end is connected to the end of the top guard plate 10 close to the left guard plate 20, and one end of the other second oil cylinder is connected to the bottom of the right guard plate 30, and the other end is connected to the end of the top guard plate 10 close to the right guard plate 30, and the two second oil cylinders are arranged front and back along the direction of the right guard plate 30 parallel to the length of the lane. Of course, the number of second oil cylinders can also be three or four, which is not specifically limited in the embodiment of the present invention. At this time, the number of the first oil cylinder is the same as that of the second oil cylinder, forming a plurality of oil cylinder assemblies, and the first oil cylinder and the second oil cylinder in the same oil cylinder assembly are located in the same plane; different oil cylinder assemblies are arranged front and back along the length direction of the lane, as shown in FIG. Figure 3 and Figure 4 shown.

[0033] In addition, a support drive unit 70 is installed at the bottom of the left side guard plate 20 and the right side guard plate 30 respectively. The support drive unit 70 is a one-way oil cylinder, wherein the oil cylinder seat is installed on the side of the left side guard plate 20 and the right side guard plate 30 away from the surrounding rock of the tunnel, and the piston rod of the oil cylinder abuts against the inner wall of the tunnel. Of course, the support drive unit 70 can also be a two-way oil cylinder, in which one output end is connected to the corresponding plate body in the left side guard plate 20 and the right side guard plate 30. There are multiple support drive units 70 installed on the same left side guard plate 20, which are arranged in parallel with each other; there can also be multiple support drive units 70 installed on the right side guard plate 30, which are arranged in parallel with each other.

[0034] The temporary tunnel support device also includes a control system 80, which uniformly controls the first drive unit 31, the second drive unit 32, the push-pull drive unit 40 and the support drive unit 70 to achieve support, support cancellation and travel of the temporary tunnel support device.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A temporary tunnel support device, characterized in that: It comprises a top guard plate, a left side guard plate and a right side guard plate, wherein the left side guard plate and the right side guard plate are respectively located at opposite sides of the top guard plate, a first driving unit is installed between the top guard plate and the left side guard plate, and a second driving unit is installed between the top guard plate and the right side guard plate, and under the action of the first driving unit and the second driving unit, the top guard plate, the left side guard plate and the right side guard plate are in contact with the surrounding rock of the tunnel; There are multiple top guard plates, left guard plates and right guard plates, and the top guard plates, the left guard plates and the right guard plates are arranged one by one. Multiple left guard plates are connected in sequence, and multiple right guard plates are connected in sequence. Push-pull drive units are installed between two adjacent left guard plates and between two adjacent right guard plates respectively. A support drive unit is installed at the lower end of the left side guard plate and the lower end of the right side guard plate respectively. The support drive unit is a one-way oil cylinder. The oil cylinder seat of the one-way oil cylinder is installed on the side of the left side guard plate and the right side guard plate away from the surrounding rock of the tunnel. The piston rod of the one-way oil cylinder abuts against the inner wall of the tunnel. Flexible tracks are respectively installed on the side of the top guard plate, the left side guard plate and the right side guard plate facing the tunnel; multiple rollers are respectively provided on the top guard plate, the left side guard plate and the right side guard plate, and the flexible tracks are respectively installed on the top guard plate, the left side guard plate and the right side guard plate through the corresponding multiple rollers; when the top guard plate, the left side guard plate and the right side guard plate move along the length direction of the tunnel, the flexible tracks are in flexible contact with the surrounding rocks of the tunnel, and the temporary support device of the tunnel is moved under pressure through the push-pull drive unit under the action of the rollers.

2. The temporary tunnel support device according to claim 1, characterized in that: The push-pull driving unit is a bidirectional oil cylinder.

3. The temporary tunnel support device according to claim 1, characterized in that: The first drive unit and the second drive unit are both bidirectional oil cylinders, the two output ends of the first drive unit are respectively hinged to the top guard plate and the left side guard plate, and the two output ends of the second drive unit are respectively hinged to the top guard plate and the right side guard plate.

4. The temporary tunnel support device according to claim 3 is characterized in that: The first driving unit includes two first oil cylinders, one end of one of the first oil cylinders is connected to the top of the left guard plate, and the other end is connected to an end of the top guard plate close to the right guard plate, and one end of the other first oil cylinder is connected to the bottom of the left guard plate, and the other end is connected to an end of the top guard plate close to the left guard plate. The two first oil cylinders are arranged front and back along the direction of the left guard plate parallel to the length of the tunnel.

5. The temporary tunnel support device according to claim 3 or 4, characterized in that: The second driving unit includes two second oil cylinders, one end of one of the second oil cylinders is connected to the top of the right protective plate, and the other end is connected to an end of the top protective plate close to the left protective plate, and one end of the other second oil cylinder is connected to the bottom of the right protective plate, and the other end is connected to an end of the top protective plate close to the right protective plate. The two second oil cylinders are arranged front and back along the direction of the right protective plate parallel to the length of the tunnel.

Images