Tunnel intersection arch support device and method

Abstract

The present invention belongs to the technical field of construction engineering, and specifically is a tunnel intersection arch support device and method, comprising a tunnel main tunnel; the side wall of the tunnel main tunnel is connected to an inclined shaft; the inner walls of the tunnel main tunnel and the inclined shaft are both fixedly connected with arched steel plates; a connecting seat is connected between the arched steel plates located at the intersection of the tunnel main tunnel and the inclined shaft; a steel column is fixedly connected to the bottom end of the arched steel plate; the cross-section of the arched steel plate and the steel column is I-shaped, and the two arched steel plates are connected by a connecting seat, so that the pressure of the inner wall of the tunnel main tunnel is transmitted to the arched steel plate on the inner wall of the inclined shaft through the connecting seat, so that the inner wall pressure at the intersection of the tunnel main tunnel and the inclined shaft is evenly transmitted to the ground of the tunnel through the two arched steel plates, thereby better supporting the inner wall at the intersection of the tunnel main tunnel and the inclined shaft, and preventing local uneven force from causing tunnel collapse.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, and in particular relates to a tunnel intersection arch support device and method. Background Art

[0002] During the tunnel excavation and construction process, workers need to reinforce the walls of the newly excavated tunnel in time to avoid tunnel collapse. Some tunnels are too long, and it is often necessary to open a new inclined shaft to connect to the main tunnel to increase the working surface and facilitate construction for workers. The inner wall at the intersection of the main tunnel and the inclined shaft has an incomplete structure and weak load-bearing capacity, so it needs arch support to fix and support it.

[0003] The prior art also proposes some solutions, such as using multiple arch supports at the intersection of the tunnel main hole and the inclined shaft, and making them fit to the inner wall surface position at the intersection, so as to support the tunnel main hole and the inclined shaft separately.

[0004] In the prior art, the arch support at the intersection of the tunnel main hole and the inclined shaft mostly supports the inner walls of the tunnel main hole and the inclined shaft separately. However, since the inner wall of one side of the main hole has become incomplete due to the passage of the inclined shaft, the support effect on the tunnel main hole is not good.

[0005] To this end, the present invention provides a tunnel intersection arch support device and method. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: the tunnel intersection arch support device described in the present invention comprises a tunnel main hole; the side wall of the tunnel main hole is connected with an inclined shaft; the inner walls of the tunnel main hole and the inclined shaft are both fixedly connected with arched steel plates; a connecting seat is connected between the arched steel plates located at the intersection of the tunnel main hole and the inclined shaft; a steel column is fixedly connected to the bottom end of the arched steel plate; the cross-section of the arched steel plate and the steel column is an I-shaped; when working, in the process of long-distance tunnel construction, due to the long travel of the tunnel, it is often necessary to open a new inclined shaft to connect the tunnel main hole, so as to increase the working surface and facilitate the construction of workers, and the inner wall at the intersection of the tunnel main hole and the inclined shaft has a relatively weak load-bearing capacity due to the incomplete structure, The present invention can be used to solve this problem. First, workers fix the arched steel plate on the inner wall surface at the intersection of the tunnel main hole and the inclined shaft. The arched steel plate on the surface of the tunnel main hole is close to the bottom surface of the inclined shaft and is connected to the arched steel plate fixed on the inner wall surface of the inclined shaft through a connecting seat. The bottom ends of the arched steel plates at other positions are fixed to the tunnel ground through steel columns. The two arched steel plates are connected through the connecting seat, so that the pressure of the inner wall of the tunnel main hole is transmitted to the arched steel plate on the inner wall of the inclined shaft through the connecting seat, so that the inner wall pressure at the intersection of the tunnel main hole and the inclined shaft is evenly transmitted to the tunnel ground through the two arched steel plates, thereby better supporting the inner wall at the intersection of the tunnel main hole and the inclined shaft to prevent local uneven force from causing tunnel collapse.

[0008] Preferably, the connecting seat includes two clamping plates; the two clamping plates are attached to the two side surfaces of the arched steel plate fixed to the inner wall of the main hole; a slot is opened at one end of the two clamping plates close to the inclined shaft; the slot at one end of the clamping plate is clamped with the arched steel plate at the inclined shaft; a connecting block is arranged between the clamping plates; when working, the workers attach the two clamping plates to the two side surfaces of the arched steel plate, and then connect the two clamping plates through the connecting block, and clamp the slot at one end of the clamping plate with the arched steel plate at the inclined shaft, and fix the arched steel plate through the two clamping plates, so that the clamping plates can adapt to arched steel plates of different sizes, thereby expanding the versatility of the present invention.

[0009] Preferably, a through groove is provided on the side of the connecting block; the two notches of the through groove are both slidably connected to the limit block; the two clamping plates are provided with limit grooves at the corresponding positions of the limit blocks; the limit block is slidably connected to the limit groove; one end of the limit block in the through groove is fixedly connected with a tooth plate; a gear is meshingly connected between the two tooth plates; a plug hole is provided on the surface of the gear; a cylindrical groove is provided on the bottom surface of the connecting block at the corresponding position of the plug hole, and the cylindrical groove is connected to the through groove; when working, the worker inserts the limit blocks at both ends of the connecting block into the limit groove, and Slide in the limit groove, thereby driving the connecting block to slide to the middle position of the two clamping plates. At this time, the worker inserts the rivet into the socket of the gear through the cylindrical groove at the bottom of the connecting block, and then rotates the rivet to drive the gear to rotate. The rotation of the gear drives the tooth plates on both sides of the gear to move toward each other, thereby driving the limit block to move toward the notch of the through groove, and then the limit block pulls the limit grooves on the surface of the two clamping plates, so that the two clamping plates are moved closer to each other, thereby increasing the extrusion on the surface of the arched steel plate, making the clamping between the clamping plate and the arched steel plate more stable.

[0010] Preferably, the groove wall of the through groove is fixedly connected with a first sleeve at the corresponding position of the gear; the side surface of the gear close to the first sleeve is fixedly connected with a second sleeve; the second sleeve is rotatably connected to the inner wall of the first sleeve; during operation, when the gear rotates, the second sleeve on the top surface of the gear rotates in the first sleeve, and the limiting effect of the gear is achieved through the cooperation between the first sleeve and the second sleeve, preventing the gear and the tooth plate from being misaligned due to the shaking of the gear during rotation, and then causing the gear and the tooth plate to be stuck, thereby reducing the failure rate of the present invention.

[0011] Preferably, a straight rod is fixedly connected in the socket; the straight rod is slidably connected to the cylindrical groove; a connecting column is fixedly connected to the bottom surface of the straight rod, and a slot is provided on the bottom surface of the connecting column; during work, when the worker needs to retract the limit block, the worker can use a screwdriver to insert it into the slot at the bottom of the connecting column, and then the worker rotates the screwdriver, which drives the connecting column to rotate, and then the connecting column drives the straight rod to rotate, and finally the straight rod drives the gear to rotate, and the limit block is retracted by the cooperation of the gear and the toothed plate, and the connecting column is driven to rotate by the straight rod, which avoids the trouble of workers inserting rivets, thereby reducing the installation difficulty of workers and facilitating installation for workers.

[0012] Preferably, an annular groove is provided on the top surface of the second sleeve; evenly arranged balls are rollingly connected in the annular groove, and lubricating oil is provided in the annular groove; during operation, when the second sleeve rotates, the balls in the annular groove on the top of the second sleeve contact with the inner wall of the through groove, and the friction between the second roller and the inner wall of the through groove is reduced by the rolling of the balls, making the rotation of the gear easier, thereby facilitating the workers to screw the gear through the connecting column and the straight rod.

[0013] Preferably, both ends of the connecting block are fixedly connected with springs arranged evenly; one end of the spring away from the connecting block is fixedly connected with an extrusion plate; during operation, after the worker installs the clamping plate and the connecting plate, the spring will squeeze the extrusion plate, and the extrusion plate will squeeze the surface of the arched steel plate, and the extrusion of the top of the arched steel plate by the inner wall of the main hole will make the two ends of the arched steel plate tend to open outward, and at this time the arched steel plate and the extrusion plate will squeeze each other, thereby further strengthening the clamping and fixation between the clamping plate and the connecting block and the arched steel plate.

[0014] Preferably, a wedge plate is fixedly connected to one end of the inner side of the two clamping plates close to the main tunnel; the top surface of the wedge plate is rotatably connected to evenly arranged first rollers; during operation, when one end of the arched steel plate contacts the wedge plate, it will be squeezed with the extrusion plate under the guidance of the first roller, thereby transferring part of the downward pressure to the connecting block, and then from the connecting block to the arched steel plate at the inclined shaft, thereby dispersing the pressure on the top of the tunnel and transferring it to the ground of the tunnel.

[0015] Preferably, the top surface and the bottom surface of the limit block are rotatably connected with evenly arranged second rollers; during operation, when the worker inserts the limit block into the limit groove, the second rollers on the top surface and the bottom surface of the limit block can reduce the friction between the limit block and the limit groove, thereby facilitating the installation of the worker.

[0016] A tunnel intersection arch support method, which is applicable to the tunnel intersection arch support device described above, comprises the following steps:

[0017] S1. Workers first install steel columns and arched steel plates on the inner wall surfaces of the tunnel main hole and the inclined shaft, and then fix the arched steel plates and steel columns to complete the preliminary fixation of the connection between the tunnel main hole and the inner wall of the inclined shaft;

[0018] S2. After completing the preliminary fixation of the connection between the arched steel and the steel column, the workers first use two clamping plates to clamp the side wall of the arched steel plate located in the main tunnel of the tunnel, and then clamp the groove at one end of the clamping plate with the arched steel plate located on the inner wall of the inclined shaft, and then slide the limit blocks on both sides of the connecting block with the limit grooves on the surface of the clamping plate to complete the preliminary fixation of the two clamping plates;

[0019] S3. After that, the worker uses a flat-blade screwdriver to screw the connecting column at the bottom of the connecting block, and then drives the straight rod to rotate through the connecting column, and then the rotation of the straight rod drives the gear to rotate, and finally drives the toothed plate to retract inward through the gear, so that the limit block pulls the two clamping plates closer to each other, and then completes the clamping and fixing of the arched steel plate by the two clamping plates. Through the present invention, the arched steel plates on the inner wall of the tunnel main hole and the inclined shaft are connected into a whole, and the weight of the tunnel main hole and the side wall of the inclined shaft is jointly borne, so that the relatively weak inner wall at the connection between the tunnel main hole and the inclined shaft is better supported.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The tunnel intersection arch support device and method described in the present invention transfers the pressure of the inner wall of the tunnel main hole to the arched steel plate on the inner wall of the inclined shaft through a connecting seat, so that the inner wall pressure at the intersection of the tunnel main hole and the inclined shaft is evenly transferred to the ground of the tunnel through the two arched steel plates, thereby better supporting the inner wall at the intersection of the tunnel main hole and the inclined shaft and preventing local uneven force from causing tunnel collapse.

[0022] 2. The tunnel intersection arch support device and method described in the present invention drives the tooth plates on both sides of the gear to move toward each other through the rotation of the gear, thereby driving the limit block to move toward the notch of the through groove, and then the limit block pulls the limit grooves on the surfaces of the two clamping plates, so that the two clamping plates are approached to each other, thereby increasing the extrusion on the surface of the arched steel plate, making the clamping between the clamping plate and the arched steel plate more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the arched steel plate in the present invention;

[0026] Figure 3 It is a structural schematic diagram of the connecting seat in the present invention;

[0027] Figure 4 is a cross-sectional view of the connecting seat in the present invention;

[0028] Figure 5 is a cross-sectional view of the connecting block in the present invention;

[0029] Figure 6 yes Figure 5 A partial enlarged view of the middle part;

[0030] Figure 7 is a cross-sectional view of the limit block in the present invention;

[0031] Figure 8 is a flow chart of the method of the present invention;

[0032] In the figure: 1. Tunnel main hole; 2. Inclined shaft; 3. Arched steel plate; 4. Connecting seat; 5. Steel column; 6. Clamping plate; 7. Slot; 8. Connecting block; 9. Through slot; 10. Limit block; 11. Limit slot; 12. Tooth plate; 13. Gear; 14. Socket; 15. Column slot; 16. First sleeve; 17. Second sleeve; 18. Straight rod; 19. Connecting column; 20. Slot; 21. Annular slide; 22. Ball; 23. Spring; 24. Extrusion plate; 25. Wedge plate; 26. First roller; 27. Second roller. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1 to Figure 2 As shown, a tunnel intersection arch support device described in an embodiment of the present invention comprises a tunnel main hole 1; the side wall of the tunnel main hole 1 is connected to an inclined shaft 2; the inner walls of the tunnel main hole 1 and the inclined shaft 2 are both fixedly connected with arched steel plates 3; a connecting seat 4 is connected between the arched steel plates 3 located at the intersection of the tunnel main hole 1 and the inclined shaft 2; a steel column 5 is fixedly connected to the bottom end of the arched steel plate 3; the cross-sections of the arched steel plate 3 and the steel column 5 are I-shaped; when working, in the process of long-distance tunnel construction, due to the long travel of the tunnel, it is often necessary to open a new inclined shaft 2 to connect the tunnel main hole 1, so as to increase the working surface and facilitate the construction of workers, and the inner wall at the intersection of the tunnel main hole 1 and the inclined shaft 2 has a relatively weak load-bearing capacity due to the incomplete structure, so the present invention can be used To solve the problem, first, workers fix the arched steel plate 3 on the inner wall surface of the intersection of the tunnel main hole 1 and the inclined shaft 2, and the arched steel plate 3 on the surface of the tunnel main hole 1 is close to the bottom surface of the inclined shaft 2, and is connected to the arched steel plate 3 fixed on the inner wall surface of the inclined shaft 2 through the connecting seat 4, and the bottom ends of the arched steel plates 3 at other positions are fixed to the tunnel ground through the steel column 5, and the two arched steel plates 3 are connected through the connecting seat 4, so that the pressure of the inner wall of the tunnel main hole 1 is transmitted to the arched steel plate 3 on the inner wall of the inclined shaft 2 through the connecting seat 4, so that the inner wall pressure of the intersection of the tunnel main hole 1 and the inclined shaft 2 is evenly transmitted to the tunnel ground through the two arched steel plates 3, thereby better supporting the inner wall of the intersection of the tunnel main hole 1 and the inclined shaft 2 to prevent local uneven force from causing tunnel collapse.

[0036] like Figures 2 to 3As shown, the connecting seat 4 includes two clamping plates 6; the two clamping plates 6 are attached to the two side surfaces of the arched steel plate 3 fixedly connected to the inner wall of the main hole 1; the two clamping plates 6 are provided with a slot at one end close to the inclined shaft 2; the slot 7 at one end of the clamping plate 6 is clamped with the arched steel plate 3 at the inclined shaft 2; a connecting block 8 is arranged between the clamping plates 6; when working, the worker attaches the two clamping plates 6 to the two side surfaces of the arched steel plate 3, and then connects the two clamping plates 6 through the connecting block 8, and clamps the slot 7 at one end of the clamping plate 6 with the arched steel plate 3 at the inclined shaft 2, and fixes the arched steel plate 3 through the two clamping plates 6, so that the clamping plate 6 can adapt to arched steel plates 3 of different sizes, thereby expanding the versatility of the present invention.

[0037] like Figures 3 to 5 As shown, a through groove 9 is provided on the side of the connecting block 8; the two notches of the through groove 9 are both slidably connected to the limiting block 10; the two clamping plates 6 are provided with limiting grooves 11 at the corresponding positions of the limiting blocks 10; the limiting blocks 10 are slidably connected to the limiting grooves 11; one end of the limiting block 10 in the through groove 9 is fixedly connected with a tooth plate 12; a gear 13 is meshingly connected between the two tooth plates 12; a plug hole 14 is provided on the surface of the gear 13; a cylindrical groove 15 is provided on the bottom surface of the connecting block 8 at the corresponding position of the plug hole 14, and the cylindrical groove 15 is connected to the through groove 9; when working, the worker inserts the limiting blocks 10 at both ends of the connecting block 8 into the limiting grooves 11, and slide in the limiting groove 11, thereby driving the connecting block 8 to slide to the middle position of the two clamping plates 6. At this time, the worker inserts the rivet into the insertion hole 14 of the gear 13 through the cylindrical groove 15 at the bottom of the connecting block 8, and then rotates the rivet to drive the gear 13 to rotate through the rivet, and then the rotation of the gear 13 drives the toothed plates 12 on both sides of the gear 13 to move toward each other, thereby driving the limiting block 10 to move toward the notch of the through groove 9, and then the limiting grooves 11 on the surfaces of the two clamping plates 6 are pulled by the limiting block 10, so that the two clamping plates 6 are moved closer to each other, thereby increasing the extrusion on the surface of the arched steel plate 3, making the clamping between the clamping plate 6 and the arched steel plate 3 more stable.

[0038] like Figures 5 and 6 As shown, the groove wall of the through groove 9 is fixedly connected with a first sleeve 16 at a corresponding position of the gear 13; the side surface of the gear 13 close to the first sleeve 16 is fixedly connected with a second sleeve 17; the second sleeve 17 is rotatably connected to the inner wall of the first sleeve 16; during operation, when the gear 13 rotates, the second sleeve 17 on the top surface of the gear 13 rotates in the first sleeve 16, and the limiting effect on the gear 13 is achieved through the cooperation between the first sleeve 16 and the second sleeve 17, so as to prevent the gear 13 and the tooth plate 12 from being misaligned due to the shaking of the gear 13 during rotation, and then causing the gear 13 and the tooth plate 12 to be stuck, thereby reducing the failure rate of the present invention.

[0039] like Figure 5 As shown, a straight rod 18 is fixedly connected to the socket 14; the straight rod 18 is slidably connected to the cylindrical groove 15; a connecting column 19 is fixedly connected to the bottom surface of the straight rod 18, and a slot 20 is provided on the bottom surface of the connecting column 19; during work, when the worker needs to retract the limit block 10, the worker can use a screwdriver to insert it into the slot 20 at the bottom of the connecting column 19, and then the worker rotates the screwdriver to drive the connecting column 19 to rotate, and then the connecting column 19 drives the straight rod 18 to rotate, and finally the straight rod 18 drives the gear 13 to rotate, and the limit block 10 is retracted by the cooperation of the gear 13 and the toothed plate 12, and the connecting column 19 is driven to rotate by the straight rod 18, which avoids the trouble of workers inserting rivets, thereby reducing the installation difficulty of workers and facilitating the installation of workers.

[0040] like Figure 6 As shown, an annular groove 21 is provided on the top surface of the second sleeve 17; balls 22 evenly arranged are rollingly connected in the annular groove 21, and lubricating oil is provided in the annular groove 21; during operation, when the second sleeve 17 rotates, the balls 22 in the annular groove 21 at the top of the second sleeve 17 contact the inner wall of the through groove 9, and the friction between the second roller and the inner wall of the through groove 9 is reduced by the rolling of the balls 22, so that the rotation of the gear 13 is easier, thereby facilitating the workers to screw the gear 13 through the connecting column 19 and the straight rod 18.

[0041] like Figure 3 As shown, both ends of the connecting block 8 are fixedly connected with springs 23 evenly arranged; one end of the spring 23 away from the connecting block 8 is fixedly connected with an extrusion plate 24; during operation, after the worker installs the clamping plate 6 and the connecting plate, the spring 23 will squeeze the extrusion plate 24, and the extrusion plate 24 will squeeze the surface of the arched steel plate 3, and the extrusion of the top of the arched steel plate 3 by the inner wall of the main hole will make the two ends of the arched steel plate 3 tend to open outward, and at this time the arched steel plate 3 will be squeezed against the extrusion plate 24, thereby further strengthening the clamping and fixation between the clamping plate 6 and the connecting block 8 and the arched steel plate 3.

[0042] like Figure 3 As shown, a wedge plate 25 is fixedly connected to one end of the inner side of two of the clamping plates 6 close to the main tunnel 1; the top surface of the wedge plate 25 is rotatably connected to the evenly arranged first rollers 26; during operation, when one end of the arched steel plate 3 contacts the wedge plate 25, it will be squeezed with the extrusion plate 24 under the guidance of the first roller 26, thereby transferring part of the downward pressure to the connecting block 8, and then from the connecting block 8 to the arched steel plate 3 at the inclined shaft 2, thereby dispersing the pressure on the top of the tunnel and transferring it to the ground of the tunnel.

[0043] Embodiment 2

[0044] like Figure 7As shown, compared with Example 1, another implementation of the present invention is: the top surface and the bottom surface of the limit block 10 are rotatably connected with evenly arranged second rollers 27; during operation, when the worker inserts the limit block 10 into the limit groove 11, the second rollers 27 on the top surface and the bottom surface of the limit block 10 can reduce the friction between the limit block 10 and the limit groove 11, thereby facilitating the installation of the workers.

[0045] A tunnel intersection arch support method, which is applicable to the tunnel intersection arch support device described above, comprises the following steps:

[0046] S1. Workers first install steel columns 5 and arched steel plates 3 on the inner wall surfaces of the tunnel main hole 1 and the inclined shaft 2, and then fix the arched steel plates 3 and the steel columns 5 to complete the preliminary fixation of the connection between the tunnel main hole 1 and the inner wall of the inclined shaft 2;

[0047] S2. After completing the preliminary fixation of the connection between the arched steel and the steel column 5, the worker first uses two clamping plates 6 to clamp the side wall of the arched steel plate 3 located in the main tunnel 1 of the tunnel, and then clamps the slot 7 at one end of the clamping plate 6 with the arched steel plate 3 located on the inner wall of the inclined shaft 2, and then slides the limit blocks 10 on both sides of the connecting block 8 with the limit slots 11 on the surface of the clamping plate 6 to complete the preliminary fixation of the two clamping plates 6;

[0048] S3. After that, the worker uses a flat-blade screwdriver to screw the connecting column 19 at the bottom of the connecting block 8, and then drives the straight rod 18 to rotate through the connecting column 19, and then the rotation of the straight rod 18 drives the gear 13 to rotate, and finally drives the toothed plate 12 to retract inward through the gear 13, so that the limit block 10 pulls the two clamping plates 6 closer to each other, and then completes the clamping and fixing of the arched steel plate 3 by the two clamping plates 6. Through the present invention, the arched steel plate 3 on the inner wall of the tunnel main hole 1 and the inclined shaft 2 is connected into a whole, and the weight of the side walls of the tunnel main hole 1 and the inclined shaft 2 are jointly borne, so that the relatively weak inner wall at the connection between the tunnel main hole 1 and the inclined shaft 2 is better supported.

[0049] During the construction of a long-distance tunnel, due to the long travel of the tunnel, it is often necessary to open a new inclined shaft 2 to connect the main tunnel hole 1 to increase the working surface and facilitate the construction of workers. The inner wall at the intersection of the main tunnel hole 1 and the inclined shaft 2 has a relatively weak load-bearing capacity due to the incomplete structure. For this reason, the present invention can be used to solve the problem. First, the worker fixes the arched steel plate 3 on the inner wall surface at the intersection of the main tunnel hole 1 and the inclined shaft 2, and the arched steel plate 3 on the surface of the main tunnel hole 1 is close to the bottom surface of the inclined shaft 2, and the arched steel plate 3 is connected to the inner wall surface of the inclined shaft 2 through the connecting seat 4. The arched steel plates 3 fixed on the wall surface are connected, and the bottom ends of the arched steel plates 3 at other positions are fixed to the tunnel ground through steel columns 5. The two arched steel plates 3 are connected through a connecting seat 4, so that the pressure of the inner wall of the main tunnel 1 is transmitted to the arched steel plate 3 on the inner wall of the inclined shaft 2 through the connecting seat 4, so that the inner wall pressure at the intersection of the main tunnel 1 and the inclined shaft 2 is evenly transmitted to the tunnel ground through the two arched steel plates 3, thereby better supporting the inner wall at the intersection of the main tunnel 1 and the inclined shaft 2, and preventing local uneven force from causing tunnel collapse.

[0050] Workers stick the two clamping plates 6 to the two side surfaces of the arched steel plate 3, then connect the two clamping plates 6 through the connecting block 8, and clamp the slot 7 at one end of the clamping plate 6 with the arched steel plate 3 at the inclined shaft 2. The arched steel plate 3 is fixed by the two clamping plates 6, so that the clamping plates 6 can adapt to arched steel plates 3 of different sizes, expanding the versatility of the present invention.

[0051] The worker inserts the limit blocks 10 at both ends of the connecting block 8 into the limit grooves 11 and slides in the limit grooves 11, thereby driving the connecting block 8 to slide to the middle position of the two clamping plates 6. At this time, the worker inserts the rivet into the socket 14 of the gear 13 through the cylindrical groove 15 at the bottom of the connecting block 8, and then rotates the rivet to drive the gear 13 to rotate. The rotation of the gear 13 drives the tooth plates 12 on both sides of the gear 13 to move toward each other, thereby driving the limit blocks 10 to move toward the notch of the through groove 9, and then the limit blocks 10 pull the limit grooves 11 on the surface of the two clamping plates 6, so that the two clamping plates 6 are close to each other, thereby increasing the extrusion on the surface of the arched steel plate 3, making the clamping between the clamping plate 6 and the arched steel plate 3 more stable.

[0052] When the gear 13 rotates, the second sleeve 17 on the top surface of the gear 13 rotates in the first sleeve 16. The cooperation between the first sleeve 16 and the second sleeve 17 realizes the limiting effect on the gear 13, thereby preventing the gear 13 and the tooth plate 12 from being misaligned due to the shaking of the gear 13 during rotation, thereby preventing the gear 13 and the tooth plate 12 from being stuck, thereby reducing the failure rate of the present invention.

[0053] When the worker needs to retract the limit block 10, the worker can use a screwdriver to insert it into the slot 20 at the bottom of the connecting column 19, and then the worker rotates the screwdriver to drive the connecting column 19 to rotate, and then the connecting column 19 drives the straight rod 18 to rotate, and finally the straight rod 18 drives the gear 13 to rotate. The limit block 10 is retracted through the cooperation of the gear 13 and the toothed plate 12, and the connecting column 19 is driven to rotate by the straight rod 18, which avoids the trouble of workers inserting rivets, thereby reducing the installation difficulty of workers and facilitating the installation of workers.

[0054] When the second sleeve 17 rotates, the ball 22 in the annular groove 21 at the top of the second sleeve 17 contacts the inner wall of the through groove 9. The rolling of the ball 22 reduces the friction between the second roller and the inner wall of the through groove 9, making the rotation of the gear 13 easier, thereby making it convenient for workers to screw the gear 13 through the connecting column 19 and the straight rod 18.

[0055] After the workers install the clamping plate 6 and the connecting plate, the spring 23 will squeeze the squeezing plate 24, and the squeezing plate 24 will squeeze the surface of the arched steel plate 3. The squeezing of the top of the arched steel plate 3 by the inner wall of the main hole will cause the two ends of the arched steel plate 3 to tend to open outward. At this time, the arched steel plate 3 and the squeezing plate 24 will squeeze each other, thereby further strengthening the clamping and fixation between the clamping plate 6 and the connecting block 8 and the arched steel plate 3.

[0056] When one end of the arched steel plate 3 contacts the wedge plate 25, it will be squeezed with the extrusion plate 24 under the guidance of the first roller 26, thereby transferring part of the downward pressure to the connecting block 8, and then from the connecting block 8 to the arched steel plate 3 at the inclined shaft 2, thereby dispersing the pressure on the top of the tunnel and transferring it to the ground of the tunnel.

[0057] When the worker inserts the limiting block 10 into the limiting groove 11 , the second rollers 27 on the top and bottom surfaces of the limiting block 10 can reduce the friction between the limiting block 10 and the limiting groove 11 , thereby facilitating the installation of the worker.

[0058] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tunnel intersection arch support device, characterized in that: The invention comprises a tunnel main hole (1); the side wall of the tunnel main hole (1) is connected to an inclined shaft (2); the inner walls of the tunnel main hole (1) and the inclined shaft (2) are both fixedly connected with arched steel plates (3); a connecting seat (4) is connected between the arched steel plates (3) at the intersection of the tunnel main hole (1) and the inclined shaft (2); a steel column (5) is fixedly connected to the bottom end of the arched steel plate (3); the cross-sections of the arched steel plate (3) and the steel column (5) are I-shaped; The connecting seat (4) comprises two clamping plates (6); the two clamping plates (6) are attached to the two side surfaces of the arched steel plate (3) fixedly connected to the inner wall of the main hole (1); a clamping groove (7) is provided at one end of the two clamping plates (6) close to the inclined shaft (2); the clamping groove (7) at one end of the clamping plate (6) is clamped with the arched steel plate (3) at the inclined shaft (2); a connecting block (8) is provided between the clamping plates (6); The side of the connecting block (8) is provided with a through groove (9); the two notches of the through groove (9) are both slidably connected to the limit block (10); the two clamping plates (6) are provided with limit grooves (11) at positions corresponding to the limit blocks (10); the limit blocks (10) are slidably connected to the limit grooves (11); one end of the limit block (10) in the through groove (9) is fixedly connected with a tooth plate (12); a gear (13) is meshingly connected between the two tooth plates (12); a plug hole (14) is provided on the surface of the gear (13); the bottom surface of the connecting block (8) is provided with a columnar groove (15) at a position corresponding to the plug hole (14), and the columnar groove (15) is connected to the through groove (9); A straight rod (18) is fixedly connected in the insertion hole (14); the straight rod (18) is slidably connected to the columnar groove (15); a connecting column (19) is fixedly connected to the bottom surface of the straight rod (18), and a straight groove (20) is formed on the bottom surface of the connecting column (19).

2. A tunnel intersection arch support device according to claim 1, characterized in that: A first sleeve (16) is fixedly connected to the groove wall of the through groove (9) at a position corresponding to the gear (13); a second sleeve (17) is fixedly connected to a surface of one side of the gear (13) close to the first sleeve (16); and the second sleeve (17) is rotatably connected to the inner wall of the first sleeve (16).

3. A tunnel intersection arch support device according to claim 2, characterized in that: An annular slide groove (21) is provided on the top surface of the second sleeve (17); balls (22) arranged evenly are rollingly connected in the annular slide groove (21), and lubricating oil is provided in the annular slide groove (21).

4. The tunnel intersection arch support device according to claim 1, characterized in that: Both ends of the connection block (8) are fixedly connected to springs (23) that are evenly arranged; and one end of the spring (23) that is away from the connection block (8) is fixedly connected to an extrusion plate (24).

5. The tunnel intersection arch support device according to claim 2, characterized in that: A wedge plate (25) is fixedly connected to one end of the inner side of the two clamping plates (6) close to the tunnel main hole (1); the top surface of the wedge plate (25) is rotatably connected to uniformly arranged first rollers (26).

6. The tunnel intersection arch support device according to claim 1, characterized in that: The top surface and the bottom surface of the limit block (10) are both rotatably connected to evenly arranged second rollers (27).

7. A tunnel intersection arch support method, the method is applicable to a tunnel intersection arch support device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Workers first install steel columns (5) and arched steel plates (3) on the inner wall surfaces of the tunnel main hole (1) and the inclined shaft (2), and then fix the arched steel plates (3) and the steel columns (5) to complete the preliminary fixation of the connection between the tunnel main hole (1) and the inner wall of the inclined shaft (2); S2. After completing the preliminary fixation of the connection between the arched steel plate (3) and the steel column (5), the worker first uses two clamping plates (6) to clamp the side wall of the arched steel plate (3) located in the main tunnel (1), and then clamps the clamping groove (7) at one end of the clamping plate (6) with the arched steel plate (3) located on the inner wall of the inclined shaft (2), and then slides the limit blocks (10) on both sides of the connecting block (8) with the limit grooves (11) on the surface of the clamping plate (6) to complete the preliminary fixation of the two clamping plates (6); S3. The worker then uses a flat-blade screwdriver to screw the connecting column (19) at the bottom of the connecting block (8), and then drives the straight rod (18) to rotate through the connecting column (19), and then the rotation of the straight rod (18) drives the gear (13) to rotate, and finally drives the toothed plate (12) to retract inward through the gear (13), so that the limit block (10) pulls the two clamping plates (6) closer to each other, thereby completing the clamping and fixing of the arched steel plate (3) by the two clamping plates (6).

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