Tunnel vault supporting device applied to extremely high ground stress tunnel construction

Abstract

The utility model discloses a tunnel vault supporting device applied to extremely high crustal stress tunnel construction, which comprises a supporting lining frame, a supporting box is mounted on the inner side of the supporting lining frame, a stand column is mounted on the inner side of the supporting box, a second oil cylinder is mounted at the top end of the stand column, and the stand column is connected with the inner top of the supporting lining frame through the second oil cylinder. A mounting seat is fixedly mounted in the supporting box, and supporting columns are arranged on the left side and the right side of the mounting seat; the stand columns are connected with the supporting columns in the supporting boxes through the connecting pieces, the stand columns are fixedly connected with the mounting seats in the supporting boxes through bolt fastening connection between the fixing pieces and the mounting seats, and the multiple sets of penetrating columns are transversely arranged on the two sides of the mounting seats in a penetrating mode. And the supporting strength of the stand columns is enhanced through the fixed supporting structures and the penetrating columns transversely arranged in the supporting box, and when the deformation load of the vault is transmitted to the fixed supporting structures and the stand columns, supporting and protection in the tunnel construction process are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel vault supporting device used for extremely high ground stress tunnel construction. Background Art

[0002] In the extremely high stress tunnel environment, the rock mass is intact, the rock quality is relatively soft, and the self-stabilizing ability is poor. The bedrock fissure water is mainly stored in the bedrock joints and fissures. Small collapses may occur during construction, the side walls are prone to instability, and block falling may occur. The broken and weak surrounding rock mass has developed cracks and contains a large amount of hydrophilic minerals. It swells and shrinks when exposed to water, and its strength decays rapidly. During the tunnel construction process, the surrounding rock will produce large deformations, and the surrounding rock stress adjustment time will increase. During the tunnel construction process, in order to prevent the tunnel vault from deforming, a tunnel vault support device is required for support. Therefore, during the tunnel construction process, the vault support device is required.

[0003] During the use of the existing tunnel vault support device, the vault above the tunnel is affected by the deformation of the surrounding rock, and the pressure on the vault increases. As the deformation of the surrounding rock increases, the pressure on the tunnel vault also increases. When supporting the vault, the single support structure is not conducive to dispersing the deformation load of the tunnel vault, so the bearing capacity of the support structure is limited. At the same time, the fit between the support structure and the arch structure of the tunnel vault is poor, which is not conducive to supporting the pressure at different positions of the vault. At the same time, the support structure has poor adaptability. When the tunnel vault bears the deformation pressure of the surrounding rock, it will sink, which is not conducive to adaptive adjustment according to the sinking situation.

[0004] Therefore, those skilled in the art provide a tunnel vault support device for use in extremely high ground stress tunnel construction to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the present utility model is to provide a tunnel vault support device for use in the construction of extremely high ground stress tunnels, so as to solve the problems proposed in the above-mentioned background technology that the existing tunnel vault support device has a poor load dispersion effect on the vault during use, resulting in a large bearing pressure of the support device, and in addition, the coordination and adaptability between the support structure and the vault structure are poor.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The top of the support frame is fixed with a lifting mechanism, and the lifting mechanism is lifted up and down, and the support frame is lifted and lowered, and the support frame is fixed with a lifting mechanism, and a support frame, and a cam are installed on the top of the support frame.

[0008] As a further solution of the present invention: the pillars are connected to the columns via a connecting piece, and both ends of the connecting piece are connected to the pillars and the columns via bolts respectively.

[0009] As a further solution of the present invention: the fixing member and the column are fixedly connected, and the column is connected to the mounting seat through the fixing member.

[0010] As a further solution of the present invention: the output end of the oil cylinder three is fixedly provided with a perforated part, and a connecting bolt is inserted into the inside of the perforated part, the lower end of the support frame is fixedly connected with a welding part, and the lower end of the support frame is connected to the balance bracket through the welding part.

[0011] As a further solution of the present invention: a sliding groove is provided on the surface of the arc frame, and a sliding cylinder is slidably installed inside the sliding groove. The sliding cylinder is fixedly connected to the adjustment bracket, and a through bolt is inserted into the inside of the sliding cylinder. The arc frame is evenly distributed along the spine frame.

[0012] As a further solution of the present invention: the bottom of the adjustment bracket is fixedly connected to an arc-shaped piece, and a fixing hole is fixedly opened on the surface of the arc-shaped piece.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The arc frame is set to an arc structure, which is conducive to fitting the vault structure inside the tunnel. At the same time, the arc structure is used to disperse the deformation load force of the vault. By evenly distributing the external pressure to the entire arc surface, the stress concentration phenomenon is reduced. An adjustment bracket is installed in the internal sliding of the arc frame. According to the arc length of the tunnel vault, the adjustment bracket is moved to extend the overall length of the arc frame so that the arc frame can adapt to the tunnel vault structure. An arc part is welded and fixed at the bottom of the adjustment bracket. The surface of the arc part is provided with a fixing hole. The output end of the oil cylinder three on the support frame is connected to the bottom of the adjustment bracket by using a connecting bolt. According to the length adjustment of the adjustment bracket, the distribution number and distribution position of the support frame are increased and adjusted, and connected by connecting bolts. In this way, while the adjustment bracket realizes length adjustment, it also increases the bottom support, improves the supporting force of the adjustment frame and the arc frame on the tunnel vault, and at the same time, the oil cylinder three at the upper end of the support frame will increase the supporting strength of the adjustment bracket.

[0015] 2. The arc frames are distributed equidistantly along the spine frame. The spine frame is used to align with the arc-shaped symmetrical center line of the tunnel vault and is longitudinally extended with the center line as the midpoint. The spine frame is used as the keel support structure of the vault. On the one hand, the arc frame is combined with the arc frame to increase the supporting strength of the vault. The single arc frame adopts a horizontal setting, while the spine frame adopts a longitudinal setting. The vertical and horizontal connections improve the supporting bearing capacity of the tunnel vault. A support frame is set below the arc frame. The support frame is used to support the bottom of the arc frame and the adjustment frame. A balancing bracket is installed below the support frame. A supporting liner is fixedly welded below the balancing bracket. A column is installed below the inner top of the support liner. According to the actual sinking of the vault, the support liner will be adjusted in height. A second oil cylinder is set at the upper end of the column to adjust the column in conjunction with the height adjustment of the support liner. The support liner, balancing bracket, column and support frame form a fixed support structure, which is combined with each other to solve the problem of poor bearing capacity of the single support structure on the vault.

[0016] 3. The columns are connected to the pillars in the support box through connectors. The columns are fixed to the mounting seats inside the support box through bolts between the fixings and the mounting seats. There are multiple groups of interspersed columns on both sides of the mounting seats. In this way, the columns are connected between the support boxes and the interspersed columns arranged horizontally in the support boxes to strengthen the supporting strength of the columns. When the deformation load of the arch is transferred to the fixed support structure and the columns, support and protection are achieved during the tunnel construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic structural diagram of a tunnel vault support device used in the construction of extremely high ground stress tunnels.

[0018] Figure 2The figure is a schematic diagram of the support box structure of a tunnel vault support device used in the construction of extremely high ground stress tunnels.

[0019] Figure 3 This is a schematic diagram of the internal structure of a support box in a tunnel vault support device used in the construction of extremely high ground stress tunnels.

[0020] Figure 4 The figure is a schematic diagram of the structure of a support frame used in a tunnel vault support device for extremely high ground stress tunnel construction.

[0021] Figure 5 This is a schematic diagram of the distribution structure of the ridge frame and the arc frame in a tunnel vault support device used in the construction of extremely high ground stress tunnels.

[0022] In the figure: 1. Support liner; 2. Cylinder 1; 3. Support box; 4. Column; 401. Pillar; 402. Connector; 403. Fixing part; 404. Mounting seat; 405. Through-column; 5. Cylinder 2; 6. Balance bracket; 7. Support frame; 701. Welding part; 702. Cylinder 3; 703. Connecting bolt; 8. Arc frame; 9. Spine frame; 10. Adjustment bracket; 11. Slide groove; 12. Slide tube; 13. Through-column bolt; 14. Arc member; 15. Fixing hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 5The embodiment of the utility model provides a tunnel vault support device for use in extremely high ground stress tunnel construction, comprising: a support liner 1, a support box 3 is installed on the inner side of the support liner 1, and a column 4 is installed on the inner side of the support box 3, a top of the column 4 is installed with a cylinder 2 5, and the column 4 is connected to the inner top of the support liner 1 through the cylinder 2 5, a mounting seat 404 is fixedly installed inside the support box 3, and pillars 401 are provided on the left and right sides of the mounting seat 404, and the surface of the pillar 401 is fastened with a connecting piece 402 by bolts, and the mounting seat 4 04 is fixed with fixing parts 403 by bolts, and the four corners of the surface of the mounting seat 404 are fixedly inserted with interpenetrating columns 405. A balancing bracket 6 is fixedly installed above the support liner 1, and oil cylinders 2 are installed on both sides of the surface of the support liner 1. The support column 401 is connected to the column 4 through the connecting part 402, and the two ends of the connecting part 402 are respectively connected to the support column 401 and the column 4 by bolts. The fixing part 403 is fixedly connected to the column 4, and the column 4 is connected to the mounting seat 404 through the fixing part 403;

[0025] Specifically, the support box 3 is arranged on the inner side of the support liner 1. The support box 3 increases the bearing capacity of the column 4 through the connection between the internal pillar 401 and the mounting seat 404 and the column 4. The four corners of the mounting seat 404 are interspersed with interspersed columns 405. The column 4 is arranged vertically, and the interspersed columns 405 are arranged horizontally. The column 4 is connected to the pillar 401 and the mounting seat 404 through the fixing member 403 and the connecting member 402. After the column 4 is subjected to the deformation load transmitted from above, the column 4 is transmitted to the support box 3 through the connection between the mounting seat 404 and the pillar 401. The support box 3 is used to disperse the bearing pressure of the column 4, thereby improving the supporting strength of the column 4. In combination with the support liner 1, the strengthened bottom supporting force is conducive to bearing the larger deformation load from above. Cylinders 2 are set on both sides of the support liner 1, and the support liner 1 is raised and lowered by the cylinder 2 to adapt to different sinking conditions inside the tunnel.

[0026] The upper part of the balancing bracket 6 is fixedly connected to the supporting frame 7, and the upper end of the supporting frame 7 is installed with the oil cylinder three 702, and the upper part of the oil cylinder three 702 is installed with the arc frame 8, and the inner part of the arc frame 8 is slidably installed with the adjusting bracket 10, and the symmetrical center line of the arc frame 8 is installed with the spine frame 9. The output end of the oil cylinder three 702 is fixedly provided with a perforated piece, and the inner part of the perforated piece is inserted with a connecting bolt 703, and the lower end of the supporting frame 7 is fixedly connected with the welding piece 701, and the lower end of the supporting frame 7 is connected to the balancing bracket 6 through the welding piece 701. The surface of the arc frame 8 is provided with a slide groove 11, and the inner part of the slide groove 11 is slidably installed with a slide cylinder 12, the slide cylinder 12 and the adjusting bracket 10 are fixedly connected, and the inner part of the slide cylinder 12 is inserted with an interlaced bolt 13, the arc frames 8 are equidistantly distributed along the spine frame 9, and the bottom of the adjusting bracket 10 is fixedly connected with an arc piece 14, and the surface of the arc piece 14 is fixedly provided with a fixing hole 15;

[0027] The top of the support frame 1 is welded to the balance bracket 6, and the top of the balance bracket 6 is welded with a support frame 7 by a welding part 701. The support frame 7 is supported from the inside of the arc frame 8 and the adjustment bracket 10. The bottom of the support frame 7 is welded with a welding part 701. The top of the support frame 7 is installed with a cylinder 3 702. The oil cylinder 3 702 is used to adjust the height of the upper end of the support frame 7. The upper end of the oil cylinder 3 702 is provided with a perforated member. The perforated member surface is provided with a connecting bolt 703. The adjustment bracket 10 is slidably connected with the slide groove 11 on the surface of the arc bracket through the slide cylinder 12. The front wall surface of the arc bracket is provided with a slide groove 11. The sliding of the slide cylinder 12 in the slide groove 11 drives the adjustment bracket 10 to move, and the length of the arc frame 8 is adjusted. After the position is determined, the insertion bolt 13 is used to penetrate the slide cylinder 12 until it passes through the back of the arc frame 8. There is no slide groove 1 on the back of the arc frame 8. 1, only the opening is made, so that the adjusting bracket 10 is locked and fixed in the arc bracket by inserting the bolt 13, the arc frame 8 and the adjusting bracket 10 are locked together, and the arc piece 14 at the bottom of the adjusting bracket 10 cooperates with the perforated piece at the top of the cylinder three 702, so that the perforations on the surface of the perforated piece correspond to the fixing holes 15 on the surface of the arc piece 14, and the connecting bolts 703 are used to fasten the connection to complete the connection between the support frame 7 and the bottom of the adjusting bracket 10, the arc frame 8 is longitudinally distributed along the spine frame 9, extending the support range of the arc frame 8 on the vault, using the spine frame 9 to align with the arc symmetrical center line of the tunnel vault, and longitudinally extending with the center line as the midpoint, using the spine frame 9 as the keel support structure of the vault, on the one hand, combining the arc frame 8 to increase the support strength of the vault, the single arc frame 8 adopts a horizontal setting, and the spine frame 9 adopts a longitudinal setting, and the vertical and horizontal connection improves the support bearing capacity of the tunnel vault.

[0028] The working principle of this utility model is:

[0029] When using the present invention, the height of the support liner 1 is adjusted according to the deformation and sinking of the tunnel vault, and the height of the support liner 1 is adjusted by using the oil cylinder 1 2 so that the arc frame 8 above the support liner 1 can fit the tunnel vault. According to the height adjustment of the support liner 1, the height of the upper end of the column 4 is adjusted by using the oil cylinder 2 5 at the upper end of the column 4, and the upper end of the column 4 is fixedly connected to the support column 401 inside the support box 3 by using the connecting piece 402. The one-third and two-thirds of the column 4 are fixedly connected to the mounting seat 404 inside the support box 3 by means of the fixing piece 403 through the bolts. The four corners of the mounting seat 404 are provided with interlaced columns 405 to connect the column 4 to the support box 3. The mounting piece inside the support box 3 is used to fix the column 4 to the support box 3. The seat 404, the pillar 401 and the inserted rod are used to disperse the bearing pressure of the column 4, improve the supporting force of the column 4, and achieve greater load support. Secondly, according to the arc length of the arch, the length of the arc frame 8 is adjusted, and the adjusting bracket 10 is used to move along the slide 11. The adjusting bracket 10 will extend the length of the arc frame 8. The arc frame 8 is symmetrically arranged about the symmetrical center line of the spine frame 9, thereby achieving left and right adjustment, which is conducive to fitting the surface wall of the arch. The arc frame 8 is equidistantly distributed along the spine frame 9, and the spine frame 9 is used to align with the arc symmetrical center line of the tunnel arch, and is longitudinally extended with the center line as the midpoint. After the adjustment frame is slid and adjusted, the inserted bolt 13 is used to penetrate from the front end of the slide cylinder 12 to the back of the arc frame 8, and the nut is used to tighten Tighten the installation and fix the adjustment frame inside the arc frame 8. Secondly, according to the arc structure of the arc frame 8 and the extended length of the adjustment bracket 10, adjust the distribution position and distribution quantity of the bottom support frame 7. The longer the adjustment bracket 10 is extended, the more the number of support frames 7 corresponding to the bottom will be set, and the more distribution positions will be. The bottom of the arc frame 8 and the adjustment frame is supported by the support frame 7, and the deformation load force of the arc frame 8 is transmitted to the balance bracket 6 below through the support frame 7. The oil cylinder three 702 is fixedly connected to the top of the support frame 7. The upper end of the oil cylinder three 702 is provided with a perforated piece, and the perforated piece is engaged with the arc member 14 so that the perforations on the surface of the perforated piece correspond to the fixing holes 15 on the surface of the arc member 14. , use connecting bolts 703 to tighten the connection, and complete the connection between the support frame 7 and the bottom of the adjustment bracket 10. Due to the arc structure design adopted by the arc frame 8 and the adjustment bracket 10, the distance between the arc frame 8 and the balance bracket 6 is different. According to the different distances, the top height of the support frame 7 is adjusted by the cylinder three 702, so that the support frame 7 is distributed at different positions at the bottom of the adjustment bracket 10, and the connection between the arc frame 8, the adjustment bracket 10 and the balance bracket 6 is established. Finally, due to the different deformation loads at each part of the tunnel vault, the sinking conditions at different positions are different. When the arc frame 8 is longitudinally distributed along the spine frame 9, the installation height of the arc frame 8 on the spine frame 9 is adjusted according to the sinking conditions of the current installation position.During adjustment, as before, the height of the supporting liner 1 is adjusted to lower or raise the height of the upper arch frame 8. After the height of the arch frame 8 is adjusted, the arch frame 8 is welded to the spine frame 9 to complete the fixed connection between the arch frame 8 and the spine frame 9. The spine frame 9 serves as the keel support structure of the vault, and the arch frame 8 is combined with the arch frame to increase the supporting strength of the vault. The single arch frame 8 is arranged horizontally, while the spine frame 9 is arranged vertically. The vertical and horizontal connection improves the supporting bearing capacity of the tunnel vault.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tunnel vault support device for use in extremely high ground stress tunnel construction, characterized in that: include: A support liner (1), wherein a support box (3) is installed on the inner side of the support liner (1), and a column (4) is installed on the inner side of the support box (3), a second oil cylinder (5) is installed on the top of the column (4), and the column (4) is connected to the inner top of the support liner (1) through the second oil cylinder (5), a mounting seat (404) is fixedly installed inside the support box (3), and pillars (401) are provided on both left and right sides of the mounting seat (404), the surface of the pillar (401) is fastened with a connecting piece (402) by bolts, and the surface of the mounting seat (404) is fixed with a fixing piece by bolts (403), the four corners of the surface of the mounting seat (404) are fixedly interspersed with interpenetrating columns (405), a balancing bracket (6) is fixedly installed above the support liner (1), and oil cylinder one (2) is installed on both sides of the surface of the support liner (1), a supporting frame (7) is fixedly connected above the balancing bracket (6), an oil cylinder three (702) is installed on the upper end of the supporting frame (7), an arc frame (8) is installed above the oil cylinder three (702), and an adjusting bracket (10) is slidably installed inside the arc frame (8), and a spine frame (9) is installed on the symmetrical center line of the arc frame (8).

2. The tunnel vault support device for extremely high ground stress tunnel construction according to claim 1, characterized in that: The pillar (401) is connected to the upright post (4) via a connecting piece (402), and both ends of the connecting piece (402) are connected to the pillar (401) and the upright post (4) via bolts.

3. The tunnel vault support device for extremely high ground stress tunnel construction according to claim 1, characterized in that: The fixing member (403) and the column (4) are fixedly connected, and the column (4) is connected to the mounting seat (404) via the fixing member (403).

4. The tunnel vault support device for extremely high ground stress tunnel construction according to claim 1, characterized in that: The output end of the oil cylinder three (702) is fixedly provided with a perforated member, and a connecting bolt (703) is inserted into the interior of the perforated member. The lower end of the support frame (7) is fixedly connected with a welding member (701), and the lower end of the support frame (7) is connected to the balance bracket (6) through the welding member (701).

5. The tunnel vault support device for extremely high ground stress tunnel construction according to claim 1, characterized in that: The surface of the arc frame (8) is provided with a slide groove (11), and a slide cylinder (12) is slidably installed inside the slide groove (11). The slide cylinder (12) is fixedly connected to the adjustment bracket (10), and a through bolt (13) is inserted into the inside of the slide cylinder (12). The arc frame (8) is evenly distributed along the spine frame (9).

6. The tunnel vault support device for extremely high ground stress tunnel construction according to claim 1, characterized in that: The bottom of the adjustment bracket (10) is fixedly connected to an arc-shaped piece (14), and a fixing hole (15) is fixedly opened on the surface of the arc-shaped piece (14).

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