Excavation supporting structure for cavern top arch

Abstract

The excavation supporting structure for the cavern top arch comprises two supporting columns, a cross beam is supported at one ends of the tops of the two supporting columns, a positioning plate is fixedly arranged on the outer wall of the top of the cross beam, and convex sliding blocks distributed at equal intervals are arranged at the top of the positioning plate. A vertically-upward hydraulic push rod is fixedly arranged on the outer wall of the top of the convex sliding block, a supporting plate is arranged on the top of the hydraulic push rod, a high-pressure air bag is fixedly arranged on the inner wall of the supporting plate, and one end of the bottom of the high-pressure air bag communicates with a pressurizing air pipe. The output shaft of the hydraulic push rod extends out to drive the supporting plate to move upwards to make contact with the inner wall of the cavern top arch, the air compressor conveys high-pressure air into the high-pressure air bag through the pressurizing air pipe, the inner wall of the cavern top arch is supported along with expansion of the high-pressure air bag, the attaching effect on the inner wall of the cavern top arch is good, and the cavern top arch is not damaged. The cavern top arch is uniformly stressed, and the inner wall of the cavern top arch is prevented from being damaged and collapsed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel safety equipment, in particular to an excavation support structure for a cavern top arch. Background Art

[0002] The top arch of the cavern is usually an arc-shaped structure. During the excavation of the tunnel cavern, the top arch of the tunnel cavern needs to be supported and reinforced to prevent the top arch of the tunnel from collapsing and shedding of debris.

[0003] However, the existing supporting equipment for the cavern top arch supports the top of the cavern by pushing the supporting plate through a hydraulic push rod. However, the top of the cavern is an arc-shaped structure, and the inner wall of the cavern is not smooth after excavation. Therefore, the supporting plate cannot be bent and fit with the inner wall of the cavern top arch, resulting in uneven force on the cavern top arch, which is easy to cause damage to the cavern top arch and has a poor supporting effect. For this reason, we propose an excavation support structure for the cavern top arch. Utility Model Content

[0004] The utility model aims to provide a digging support structure for a cavern top arch to solve the above-mentioned technical deficiencies.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an excavation support structure for a cavern ceiling arch, comprising two support columns, wherein one end of the top of the two support columns supports a cross beam, a positioning plate is fixedly provided on the top outer wall of the cross beam, and the top of the positioning plate is provided with convex sliding blocks distributed at equal distances, and the top outer wall of the convex sliding block is fixedly provided with a vertically upward hydraulic push rod, and the top of the hydraulic push rod is provided with a support plate, and the inner wall of the support plate is fixedly provided with a high-pressure air bag, and one end of the bottom of the high-pressure air bag is connected to a pressurized air pipe, and a trachea pipe joint is installed at the end of the pressurized air pipe.

[0006] Preferably, the side walls of the positioning plate are provided with first positioning holes distributed at equal distances, and the outer walls on both sides of the convex sliding block are provided with second positioning holes distributed at equal distances, the inner wall of the convex sliding block and the outer wall of the positioning plate are slidably connected, and the inner walls of the first positioning hole and the second positioning hole are provided with matching bolts to facilitate adjustment of the position of the convex sliding block on the top of the beam, thereby adjusting the supporting position of the cavern top arch.

[0007] Preferably, a clamping block is fixedly provided on the top outer wall of the two support columns, a first limiting hole is opened on the outer walls on both sides of the clamping block, and a second limiting hole is opened on both sides of the top of the support column. The inner wall contour of the clamping block is adapted to the outer wall contours at both ends of the beam, and the inner walls of the first limiting hole and the second limiting hole are provided with matching positioning bolts to facilitate fixing the beam to the top of the support column.

[0008] Preferably, a positioning sleeve is fixedly provided on the output shaft of the hydraulic push rod, fixing plates are fixedly provided on both sides of the bottom of the support plate, movable holes are opened on the outer walls of the two fixing plates, and the positioning sleeve is movably connected to the inner walls of the two movable holes with bearings.

[0009] Preferably, a mounting hole is opened on the outer wall of one side of the bottom of the support plate, and one end of the pressurized air pipe penetrates into the inner wall of the mounting hole, so as to facilitate the arrangement of the pressurized air pipe.

[0010] Preferably, a silicone pad is bonded to the top outer wall of the high-pressure airbag, and the silicone pad can prevent the top of the high-pressure airbag from being pierced by the protrusion on the top of the cave.

[0011] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0012] The output shaft of the hydraulic push rod is extended to drive the support plate to move upward and contact the inner wall of the cavern ceiling arch. The air compressor is used to transport high-pressure air to the high-pressure airbag through the pressurized air pipe. As the high-pressure airbag expands, the inner wall of the cavern ceiling arch is supported, and the fit effect with the inner wall of the cavern ceiling arch is good, so that the cavern ceiling arch is evenly stressed, avoiding damage and collapse of the inner wall of the cavern ceiling arch, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a digging support structure for a cavern top arch according to the utility model;

[0015] Figure 2 This is a schematic diagram of the support column structure of a digging support structure for a cavern top arch according to the utility model;

[0016] Figure 3 This is a schematic diagram of the positioning plate structure of a digging support structure for a cavern top arch according to the utility model;

[0017] Figure 4 It is a schematic diagram of the hydraulic push rod structure of a digging support structure for a cavern top arch of the utility model;

[0018] Figure 5 It is a schematic diagram of the convex sliding block structure of a digging support structure for a cavern top arch of the utility model;

[0019] Figure 6 This is a schematic diagram of the support plate structure of a digging support structure for a cavern top arch according to the utility model;

[0020] Figure 7 The utility model is a schematic diagram of a high-pressure air bag structure of a digging support structure for a cave roof arch.

[0021] Description of reference numerals:

[0022] 1 support column, 2 crossbeam, 3 positioning plate, 4 first positioning hole, 5 convex slider, 6 second positioning hole, 7 hydraulic push rod, 8 positioning sleeve, 9 support plate, 10 fixing plate, 11 movable hole, 12 high-pressure airbag, 13 silicone pad, 14 pressurized air pipe, 15 air pipe joint, 16 mounting hole, 17 block, 18 first limiting hole, 19 second limiting hole. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1

[0025] Refer to the instruction manual Figure 1-7 A digging support structure for a cavern ceiling arch comprises two supporting columns 1, a cross beam 2 is supported at one end of the top of the two supporting columns 1, a positioning plate 3 is fixedly provided on the top outer wall of the cross beam 2, a convex slider 5 distributed at equal distances is provided on the top of the positioning plate 3, a hydraulic push rod 7 pointing vertically upward is fixedly provided on the top outer wall of the convex slider 5, a supporting plate 9 is provided on the top of the hydraulic push rod 7, a high-pressure air bag 12 is fixedly provided on the inner wall of the supporting plate 9, a pressurized air pipe 14 is connected to one end of the bottom of the high-pressure air bag 12, and a trachea pipe joint 15 is installed at the end of the pressurized air pipe 14.

[0026] Embodiment 2

[0027] Based on the first embodiment, the side wall of the positioning plate 3 is provided with first positioning holes 4 distributed at equal distances, and the outer walls on both sides of the convex sliding block 5 are provided with second positioning holes 6 distributed at equal distances. The inner wall of the convex sliding block 5 is slidably connected to the outer wall of the positioning plate 3. The inner walls of the first positioning hole 4 and the second positioning hole 6 are provided with matching bolts, which are convenient for adjusting the position of the convex sliding block 5 at the top of the beam 2, thereby adjusting the supporting position of the cave ceiling arch. The top outer walls of the two support columns 1 are fixed with a clamping block 17, and the outer walls on both sides of the clamping block 17 are provided with a first limiting hole 18. The top two sides of the support column 1 are provided with a second limiting hole 19. The inner wall contour of the clamping block 17 is matched with the outer wall contours at both ends of the beam 2. The inner walls of the first limiting hole 18 and the second limiting hole 19 are provided with matching positioning bolts, which are convenient for fixing the beam 2 to the top of the support column 1.

[0028] Embodiment 3

[0029] Based on the first embodiment, the output shaft of the hydraulic push rod 7 is fixed with a positioning sleeve 8, and fixed plates 10 are fixed on both sides of the bottom of the support plate 9. The outer walls of the two fixed plates 10 are provided with movable holes 11, and the positioning sleeve 8 and the inner walls of the two movable holes 11 are movably connected with bearings. The outer wall of one side of the bottom of the support plate 9 is provided with a mounting hole 16, and one end of the pressurized air pipe 14 is inserted into the inner wall of the mounting hole 16 to facilitate the arrangement of the pressurized air pipe 14. The top outer wall of the high-pressure airbag 12 is bonded with a silicone pad 13, and the silicone pad 13 can prevent the top of the high-pressure airbag 12 from being pierced by the protrusion on the top of the hole.

[0030] Working principle of this utility model:

[0031] Refer to the instruction manual Figure 1-7 When the utility model is used, the pressurized air pipe 14 is first connected to the output end of the air compressor through the air pipe joint 15. At this time, the output shaft of the hydraulic push rod 7 is extended to drive the support plate 9 to move upward and make preliminary contact with the inner wall of the cave ceiling arch. Then, the high-pressure air is delivered to the high-pressure airbag 12 through the pressurized air pipe 14 by the air compressor. As the high-pressure airbag 12 expands, the inner wall of the cave ceiling arch is supported, and the fit effect with the inner wall of the cave ceiling arch is good, so that the cave ceiling arch is evenly stressed, and the damage and collapse of the inner wall of the cave ceiling arch are avoided, and the use effect is good.

[0032] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cavern roof arch support structure, comprising two support columns (1), wherein one end of the top of the two support columns (1) supports a crossbeam (2), characterized in that: A positioning plate (3) is fixedly provided on the top outer wall of the cross beam (2), convex sliding blocks (5) are arranged at equal distances on the top of the positioning plate (3), a hydraulic push rod (7) pointing vertically upward is fixedly provided on the top outer wall of the convex sliding block (5), a support plate (9) is provided on the top of the hydraulic push rod (7), a high-pressure air bag (12) is fixedly provided on the inner wall of the support plate (9), a bottom end of the high-pressure air bag (12) is connected to a pressurized air pipe (14), and a trachea pipe joint (15) is installed at the end of the pressurized air pipe (14).

2. The excavation support structure for cavern top arch according to claim 1, characterized in that: The side wall of the positioning plate (3) is provided with first positioning holes (4) distributed at equal distances, and the outer walls on both sides of the convex sliding block (5) are provided with second positioning holes (6) distributed at equal distances. The inner wall of the convex sliding block (5) is slidably connected to the outer wall of the positioning plate (3), and the inner walls of the first positioning hole (4) and the second positioning hole (6) are provided with matching bolts.

3. The excavation support structure for cavern top arch according to claim 1, characterized in that: A clamping block (17) is fixedly provided on the top outer wall of the two support columns (1), and first limiting holes (18) are opened on the outer walls on both sides of the clamping block (17). Second limiting holes (19) are opened on both sides of the top of the support column (1). The inner wall contour of the clamping block (17) is matched with the outer wall contours of the two ends of the crossbeam (2), and the inner walls of the first limiting hole (18) and the second limiting hole (19) are provided with matching positioning bolts.

4. The excavation support structure for cavern top arch according to claim 1, characterized in that: The output shaft of the hydraulic push rod (7) is fixedly provided with a positioning sleeve (8), and fixed plates (10) are fixedly provided on both sides of the bottom of the support plate (9). The outer walls of the two fixed plates (10) are provided with movable holes (11), and the positioning sleeve (8) and the inner walls of the two movable holes (11) are movably connected with bearings.

5. The excavation support structure for cavern top arch according to claim 1, characterized in that: A mounting hole (16) is formed on an outer wall of one side of the bottom of the support plate (9), and one end of the pressurized air pipe (14) penetrates into the inner wall of the mounting hole (16).

6. The excavation support structure for cavern top arch according to claim 1, characterized in that: A silicone pad (13) is bonded to the top outer wall of the high-pressure airbag (12).

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