Strong rockburst section tunnel supporting structure

Abstract

The utility model relates to the technical field of tunnel engineering, in particular to a strong rockburst section tunnel supporting structure which comprises a plurality of upper steel frames, three supporting rods and convex blocks, connecting pieces are arranged at the connecting positions of the upper steel frames, threaded grooves are formed in the supporting rods, and a plurality of sliding sleeves are arranged on the outer sides of the supporting rods. An upper supporting rod is embedded in one end of one supporting rod, abutting rods are embedded in one ends of the other two supporting rods, a plurality of sliding rods are arranged on the outer side of the convex block, three adjusting mechanisms are arranged in the convex block, each adjusting mechanism comprises a worm, a worm wheel and a screw rod, the worm wheels are in transmission through the worms, so that the worm wheels drive the screw rods to rotate, and the worm wheels drive the screw rods to rotate. And the supporting rods move under the action of the screw rods and the sliding rods so as to abut against the multiple upper steel frames, and therefore the tunnel supporting device is suitable for tunnels with different heights and widths.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a tunnel support structure for a strong rock burst section. Background Art

[0002] Blasting is a common construction method in tunnel engineering. Support is a measure of support, reinforcement and protection for the side walls and surrounding environment to ensure the safety of tunnel structure construction and the surrounding environment of the foundation pit. In rock burst sections of tunnels, especially those with severe rock bursts, the role of support is particularly important. However, the current support structure is complex and the assembly process is cumbersome, which increases the construction time of workers.

[0003] The prior art patent CN214366112U discloses a tunnel support structure for a strong rock burst section, including a support rod assembly, a support steel frame assembly, steel bars, a steel mesh and a hollow grouting anchor rod. All corners of the support rod assembly are embedded in the support steel frame assembly, and the support steel frame assembly is supported on the inner wall of the tunnel. The support rod assembly includes a lower support rod, an upper support rod, a fixing plate, a first slot, a first support rod, a second support rod, a fixing head, a rubber pad and a first protective pad. The support steel frame assembly includes a lower steel frame, an upper steel frame, a second slot, a third slot, a fixing block, a second protective pad, a buckle, a fourth slot and a fixing rod. This prior art can ensure that the structure in the tunnel is more stable during the tunnel support process, and can also effectively cope with the influence of stress in the tunnel on the structure. The installation between the components is more convenient, which reduces the workload of the staff and the construction time, making the tunnel construction safer.

[0004] However, in the above-mentioned prior art, during installation, the height and width of the tunnel are different. Since the support rod assembly is formed by splicing, it cannot be adjusted according to the actual distance, thereby reducing the practicality of the support structure. Utility Model Content

[0005] The purpose of the utility model is to provide a tunnel support structure for a severe rock burst section, aiming to solve the technical problem in the prior art that during installation, the height and width of the tunnel are different, and since the support rod assembly is composed by splicing, it cannot be adjusted according to the actual distance, thereby reducing the practicality of the support structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts a strong rock burst section tunnel support structure, including multiple upper steel frames, three support rods and convex blocks, multiple upper steel frames are connected at the connection points, the support rods have threaded grooves, the outer side of the support rods are provided with multiple sliding sleeves, and one end of one of the support rods is inlaid with an upper support rod, and one end of the other two support rods is inlaid with abutment rods, multiple sliding rods are arranged on the outer side of the convex block, and three adjustment mechanisms are arranged in the convex block. The adjustment mechanism It includes a worm, a worm wheel and a screw, the worm is rotatably connected to the convex block and is located in the convex block, the worm wheel is fixedly connected to the screw and is sleeved on one end of the screw, the screw is also rotatably connected to the convex block and is located in the convex block, and the worm is also transmission-connected to the worm wheel and is located on one side of the worm wheel, the three support rods are respectively threadedly connected to the corresponding screws and sleeved on the screw, and the sliding sleeve is slidably connected to the sliding rod and sleeved on the sliding rod.

[0007] Wherein, two first bearings are arranged on the worm, and the two first bearings are respectively located in the convex block, and two second bearings are arranged at one end of the screw, and the two second bearings are respectively located on both sides of the worm wheel.

[0008] Wherein, the connecting member includes a first T-shaped block and a second T-shaped block, both ends of the upper steel frame have T-shaped grooves, the first T-shaped block is fixedly connected to the second T-shaped block, and the first T-shaped block and the second T-shaped block are respectively arranged between the two T-shaped grooves corresponding to the two upper steel frames.

[0009] Wherein, a rotating disk is arranged at one end of the worm, a handle is arranged at the end surface of the rotating disk, and an anti-slip sleeve is arranged on the handle.

[0010] Wherein, support plates are arranged on both sides of the upper steel frame, and fixing rods are arranged inside the support plates.

[0011] Wherein, a fixing plate is arranged at one end of the upper support rod.

[0012] Wherein, a fixing head is arranged at one end of the supporting rod, and a rubber pad is arranged on the fixing head.

[0013] The utility model discloses a tunnel support structure for a strong rock burst section, comprising a plurality of upper steel frames, three support rods and a convex block, wherein the connection points of the plurality of upper steel frames are provided with connecting pieces, the support rods are provided with threaded grooves, the outer sides of the support rods are provided with a plurality of sliding sleeves, and one end of one of the support rods is inlaid with an upper support rod, and one end of the other two support rods is inlaid with a holding rod, a plurality of sliding rods are provided on the outer side of the convex block, and three adjustment mechanisms are provided in the convex block, wherein the adjustment mechanism comprises a worm, a worm wheel and a screw, the worm is rotatably connected to the convex block and is located in the convex block, and the worm wheel is fixedly connected to the screw The worm gear is connected to the convex block and is sleeved on one end of the screw rod. The screw rod is also rotatably connected to the convex block and is located in the convex block. The worm gear is also transmission-connected to the worm wheel and is located on one side of the worm wheel. The three support rods are respectively threadedly connected to the corresponding screw rods and sleeved on the screw rod. The sliding sleeve is slidably connected to the sliding rod and sleeved on the sliding rod. The worm wheel is transmitted by the worm gear, so that the worm wheel drives the screw rod to rotate. The support rod moves under the action of the screw rod and the sliding rod, thereby supporting a plurality of the upper steel frames, so as to be suitable for tunnels of different heights and widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a front view of the first embodiment of the utility model.

[0016] Figure 2 The utility model Figure 1 Section view along line AA.

[0017] Figure 3 The utility model Figure 2 A partial enlarged view of point B in the middle.

[0018] Figure 4 The utility model Figure 1 Sectional view along the CC line.

[0019] Figure 5 The utility model Figure 4 A partial enlarged view of point D in the middle.

[0020] Figure 6 It is a schematic structural diagram of a plurality of upper steel frames spliced ​​together in the first embodiment of the utility model.

[0021] Figure 7 The utility model Figure 6 A partial enlarged view of point E in the middle.

[0022] Figure 8 It is a three-dimensional stereogram of the second embodiment of the utility model.

[0023] 101-upper steel frame, 102-support rod, 103-convex block, 104-threaded groove, 105-sliding sleeve, 106-upper support rod, 107-holding rod, 108-sliding rod, 109-worm, 110-worm wheel, 111-screw, 112-first bearing, 113-second bearing, 114-first T-shaped block, 115-second T-shaped block, 116-T-shaped groove, 117-rotating plate, 118-handle, 119-anti-slip sleeve, 120-steel mesh, 121-hollow grouting anchor, 201-support plate, 202-fixing rod, 203-fixing plate, 204-fixing head, 205-rubber pad. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] First embodiment:

[0026] See also Figure 1 to Figure 7 ,in Figure 1 This is a front view of the first embodiment of the utility model. Figure 2 The utility model Figure 1 The cross-sectional view along the AA line. Figure 3 The utility model Figure 2 A partial enlarged view of point B in the middle. Figure 4 The utility model Figure 1 Cross-sectional view of the CC line, Figure 5 The utility model Figure 4 A partial enlarged view of point D in the middle. Figure 6 This is a schematic diagram of the structure of a plurality of upper steel frames spliced ​​together in the first embodiment of the utility model. Figure 7 The utility model Figure 6 A partial enlarged view of point E in the middle.

[0027] The utility model provides a tunnel support structure for a strong rock burst section, comprising a plurality of upper steel frames 101, three support rods 102 and a convex block 103, wherein the connecting piece comprises a first T-shaped block 114 and a second T-shaped block 115. The above-mentioned scheme solves the technical problem that when installing, the height and width of the tunnel are different, and the support rod assembly is composed by splicing and cannot be adjusted according to the actual distance, thereby reducing the practicality of the support structure.

[0028] According to the present specific embodiment, the connection points of the plurality of upper steel frames 101 are all provided with connecting pieces, the support rods 102 are provided with thread grooves 104, the outer sides of the support rods 102 are provided with a plurality of sliding sleeves 105, and one end of one of the support rods 102 is inlaid with an upper support rod 106, and one end of the other two support rods 102 are inlaid with a holding rod 107, the outer side of the convex block 103 is provided with a plurality of sliding rods 108, and the convex block 103 is provided with three adjustment mechanisms, the adjustment mechanisms include a worm 109, a worm wheel 110 and a screw 111, the worm 109 is rotatably connected to the convex block 103 and is located in the convex block 103, the worm wheel 110 is fixedly connected to the screw 111 and is sleeved on one end of the screw 111 The screw 111 is also rotatably connected to the convex block 103 and is located in the convex block 103, and the worm 109 is also transmission-connected to the worm wheel 110 and is located on one side of the worm wheel 110. The three support rods 102 are respectively threadedly connected to the corresponding screws 111 and sleeved on the screws 111. The sliding sleeve 105 is slidingly connected to the sliding rod 108 and sleeved on the sliding rod 108. The worm wheel 110 is transmitted by the worm 109, so that the worm wheel 110 drives the screw 111 to rotate. The support rod 102 moves under the action of the screw 111 and the sliding rod 108, thereby resisting a plurality of the upper steel frames 101, so as to be suitable for tunnels of different heights and widths.

[0029] Among them, two first bearings 112 are arranged on the worm 109, and the two first bearings 112 are also respectively located in the convex block 103, and two second bearings 113 are arranged at one end of the screw 111, and the two second bearings 113 are also respectively located on both sides of the worm wheel 110. The first bearing 112 can improve the stability of the worm 109 during rotation, and the second bearing 113 can improve the stability of the screw 111 during rotation.

[0030] Secondly, both ends of the upper steel frame 101 have T-shaped grooves 116, the first T-shaped block 114 is fixedly connected to the second T-shaped block 115, and the first T-shaped block 114 and the second T-shaped block 115 are respectively arranged between the two T-shaped grooves 116 corresponding to the two upper steel frames 101. The arrangement of the first T-shaped block 114 and the second T-shaped block 115 can facilitate the splicing of multiple upper steel frames 101, thereby forming a part of the support structure.

[0031] Again, a rotating disk 117 is provided at one end of the worm 109, and a handle 118 is provided on the end face of the rotating disk 117. An anti-slip sleeve 119 is provided on the handle 118. The anti-slip sleeve 119 can facilitate the gripping force of the handle 118 to improve the gripping force of the handle 118, so that the handle 118 can transmit the rotating disk 117, thereby driving the worm 109 to rotate.

[0032] When using the utility model, firstly, concrete is sprayed on the tunnel surface, then the hollow grouting anchor rod 121 is inserted, then the steel mesh 120 is hung, then the upper steel frame 101 is assembled and placed on the tunnel surface, then the upper steel frame 101 is tied to the tunnel surface with steel bars, then the support rod 102 and the convex block 103 are assembled and placed directly under the upper steel frame 101, and at the same time, the corresponding rotating disk 117 is rotated so that the rotating disk 117 drives the worm 109 to rotate, and the worm wheel 110 rotates under the action of the worm 109. The screw rod 111 rotates under the drive of the worm gear 110, and the support rod 102 moves under the action of the thread groove 104 and the sliding rod 108, so that the upper support rod 106 and the two supporting rods 107 support the upper steel frame 101 under the action of the three adjusting mechanisms, thereby making its structure more stable. In this way, the technical problem that the height and width of the tunnel are different during installation, and the support rod assembly is composed by splicing and cannot be adjusted according to the actual distance, thereby reducing the practicality of the support structure is solved.

[0033] The second embodiment is:

[0034] Based on the first embodiment, please refer to Figure 8 ,in Figure 8 It is a three-dimensional stereogram of the second embodiment of the utility model.

[0035] According to this specific embodiment, support plates 201 are provided on both sides of the upper steel frame 101, and fixing rods 202 are provided inside the support plates 201. The arrangement of the support plates 201 and the fixing rods 202 can improve the stability between the upper steel frame 101 and the tunnel.

[0036] Among them, a fixing plate 203 is provided at one end of the upper support rod 106 , and the fixing plate 203 can be used to support the upper part of the upper steel frame 101 .

[0037] Secondly, a fixing head 204 is disposed at one end of the supporting rod 107 , and a rubber pad 205 is disposed on the fixing head 204 . The fixing head 204 and the rubber pad 205 can facilitate supporting the two ends of the upper steel frame 101 .

[0038] A tunnel support structure for a strong rock burst section using the present embodiment can improve the stability between the upper steel frame 101 and the tunnel by providing the support plate 201 and the fixing rod 202, the fixing plate 203 can facilitate support against the upper part of the upper steel frame 101, and the fixing head 204 and the rubber pad 205 can facilitate support against both ends of the upper steel frame 101.

[0039] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A tunnel support structure for a severe rock burst section, characterized in that: The invention comprises a plurality of upper steel frames, three support rods and a convex block, wherein the connection parts of the plurality of upper steel frames are provided with connecting pieces, the support rods have thread grooves, the outer side of the support rods is provided with a plurality of sliding sleeves, and one end of one of the support rods is inlaid with an upper support rod, and one end of the other two support rods are inlaid with a holding rod, a plurality of sliding rods are provided on the outer side of the convex block, and three adjusting mechanisms are provided in the convex block, the adjusting mechanism comprises a worm, a worm wheel and a screw, the worm is rotatably connected to the convex block and is located in the convex block, the worm wheel is fixedly connected to the screw and is sleeved on one end of the screw, the screw is also rotatably connected to the convex block and is located in the convex block, and the worm is also transmission connected to the worm wheel and is located on one side of the worm wheel, the three support rods are respectively threadedly connected to the corresponding screw rods and sleeved on the screw rod, and the sliding sleeve is slidably connected to the sliding rod and sleeved on the sliding rod.

2. The strong rockburst tunnel support structure according to claim 1, characterized in that: The worm is provided with two first bearings, and the two first bearings are respectively located in the convex blocks; one end of the screw is provided with two second bearings, and the two second bearings are respectively located on both sides of the worm wheel.

3. The strong rockburst tunnel support structure according to claim 2, characterized in that: The connecting member includes a first T-shaped block and a second T-shaped block, both ends of the upper steel frame have T-shaped grooves, the first T-shaped block is fixedly connected to the second T-shaped block, and the first T-shaped block and the second T-shaped block are respectively arranged between the two T-shaped grooves corresponding to the two upper steel frames.

4. The strong rockburst tunnel support structure according to claim 3, characterized in that: A rotating disk is arranged at one end of the worm, a handle is arranged on the end surface of the rotating disk, and an anti-slip sleeve is sleeved on the handle.

5. The strong rockburst tunnel support structure according to claim 4, characterized in that: Support plates are arranged on both sides of the upper steel frame, and fixing rods are arranged inside the support plates.

6. The strong rockburst section tunnel support structure according to claim 5, characterized in that: A fixing sheet is arranged at one end of the upper supporting rod.

7. The strong rockburst tunnel support structure according to claim 6, characterized in that: One end of the supporting rod is provided with a fixing head, and a rubber pad is provided on the fixing head.

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