CN113931632A

CN113931632A - Subway shaft strutting arrangement

Info

Publication number: CN113931632A
Application number: CN202111314814.9A
Authority: CN
Inventors: 樊济浩; 张亚彬; 张雪; 郭利霞; 李洋; 郭薇; 李宁; 赵杰
Original assignee: Zhengzhou Metro Group Co ltd
Current assignee: Zhengzhou Metro Group Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-01-14
Anticipated expiration: 2041-11-08
Also published as: CN113931632B

Abstract

The invention discloses a subway vertical shaft supporting device which comprises an installation block, wherein a second sliding groove is formed in the bottom surface of the installation block, a first sliding block is connected in the second sliding groove in a sliding mode, the lower surface of the first sliding block is fixedly connected with a first vertical rod, the lower end of the first vertical rod is fixedly connected with a first trapezoidal blade, two sides of the upper surface of the first sliding block are fixedly connected with vertical plates, the two vertical plates are rotatably connected with the second vertical rod, the lower end of the second vertical rod is fixedly connected with a second trapezoidal blade, the first vertical rod is overlapped with the second vertical rod, and the first trapezoidal blade is overlapped with the second trapezoidal blade. According to the invention, the first trapezoidal blade and the second trapezoidal blade are arranged to cut off the residual soil layer in a layering manner in the vertical direction, so that the pressure for cutting off the soil layer is reduced, the soil below the supporting plate can be cleaned in time, the supporting plate is convenient to descend, the newly-dug vertical shaft can be supported in time by the supporting plate, and the convenience and the trouble saving are realized.

Description

Subway shaft strutting arrangement

Technical Field

The invention belongs to the field of subway shaft support, and particularly relates to a subway shaft support device.

Background

Tunnel inclined shaft: in the construction of long tunnels, in order to shorten the construction period, vertical shafts or inclined shafts are arranged to increase the working surface, and parallel pilot pits are arranged in some cases. Although the arrangement of the vertical shaft or the inclined shaft can increase the working surface, the investment of building the shaft is needed to increase the transportation cost, according to the actual situation, a fixed format is not available, and after the tunnel is penetrated, the vertical shaft or the inclined shaft is useless.

When excavating the vertical shaft, in order to avoid collapse of soil on the wall of the vertical shaft, the supporting plate is usually used for supporting the wall of the vertical shaft, but the vertical shaft has a certain depth, when the vertical shaft is continuously excavated, the vertical shaft can only be excavated downwards from the inner wall of the supporting plate, so that the soil below the supporting plate can not be timely cleaned due to the fact that the soil is shielded by the supporting plate, the supporting plate cannot descend along with the continuous excavation of the vertical shaft, and the supporting plate cannot timely support the side wall of the vertical shaft which is just excavated.

Disclosure of Invention

The invention aims to provide a subway shaft supporting device.

In order to achieve the purpose, the invention adopts the following technical scheme:

a subway vertical shaft supporting device comprises a plurality of supporting plates, wherein the supporting plates are arc-shaped, a connecting device is arranged between the supporting plates, the supporting plates are connected with each other to form a circular ring, a first inclined surface is arranged at the lower end of each supporting plate and is adjacent to the bottom surface, a mounting frame is arranged on the first inclined surface, a connecting block is arranged on the mounting frame, the lower surface of the connecting block is fixedly connected with a hanging plate, a first sliding groove is formed in one side of the hanging plate and is in sliding connection with a mounting block, a second sliding groove is formed in the bottom surface of the mounting block and is in sliding connection with a first sliding block, the lower surface of the first sliding block is fixedly connected with a first vertical rod, the lower end of the first vertical rod is fixedly connected with a first trapezoidal blade, the two sides of the upper surface of the first sliding block are fixedly connected with vertical plates, and a second vertical rod is rotatably connected between the two vertical plates, the lower end of the second vertical rod is fixedly connected with a second trapezoidal blade, the first vertical rod is coincided with the second vertical rod, and the first trapezoidal blade is coincided with the second trapezoidal blade.

Preferably, the mounting bracket includes two mounting panels, two the mounting panel is fixed on first inclined plane, two rotate the connection threaded rod on the mounting panel, threaded rod and connecting block threaded connection, the one end fixed connection control panel of threaded rod.

Preferably, one side of hanger plate is equipped with first arc piece, one side fixed connection second arc piece of first montant, the first spring of fixed connection between one side of first slider and the lateral wall of second spout, the last bottom surface of second spout is equipped with the mounting groove, the mounting groove communicates with each other with the second spout, the first piece that dials of last bottom surface fixed connection of mounting groove, the upper end of second montant is located the mounting groove and cooperatees with first piece that dials, one side fixed connection control rod of installation piece.

Preferably, the cross sections of the first trapezoidal blade and the second trapezoidal blade are both arc-shaped.

Preferably, the lower surface of the supporting plate is fixedly connected with two vertical plates, the lower surfaces of the vertical plates are provided with third sliding grooves, the third sliding grooves are connected with second sliding blocks in a sliding mode, the lower surfaces of the second sliding blocks are fixedly connected with scrapers, and the inner walls of the lower ends of the two vertical plates are provided with second inclined planes.

Preferably, the connecting device comprises a sliding rod, a sliding hole is formed in one side of the supporting plate, the sliding rod is located in the sliding hole and is in sliding connection with the supporting plate, a second spring is fixedly connected between one end of the sliding rod and the side wall of the sliding hole, a square groove is formed in the other side of the supporting plate, the square groove is matched with the sliding rod, a cross rod is fixedly connected in the square groove, and the cross rod is located in the middle of the square groove.

Preferably, the inside of backup pad is equipped with the inner chamber, the inner chamber is linked together with third spout and slide opening, the last fixed surface of second slider connects the rack, first fixed axle is connected to the inner chamber internal rotation, the first gear of excircle fixed connection of first fixed axle, first gear and rack toothing, the excircle fixed connection rolling disc of first fixed axle, a plurality of second of excircle fixed connection of rolling disc stir the piece, inner chamber inner wall fixed connection second fixed axle, the poker rod is connected in the excircle rotation of second fixed axle, the one end and the second of poker rod are stirred the piece and are cooperateed, the lower fixed surface connecting lug of slide bar, the lug cooperatees with the other end of poker rod.

Preferably, one end of the sliding rod is rotatably connected with the one-way rotating rod.

The invention has the technical effects and advantages that: compared with the prior art, the subway vertical shaft supporting device provided by the invention has the following advantages:

1. the invention arranges a first trapezoidal blade and a second trapezoidal blade, the connecting block drives the first trapezoidal blade and the second trapezoidal blade to reach the upper part of the middle position of the thickness of the soil layer between the second round pit hole and the first round pit hole, the mounting block is pushed downwards, the mounting block drives the first trapezoidal blade and the second trapezoidal blade to move downwards to cut the residual soil layer, then the control panel is continuously rotated to enable the first trapezoidal blade and the second trapezoidal blade to move to be close to the inner wall of the first round pit hole, then the first trapezoidal blade and the second trapezoidal blade cut the residual soil layer, the first trapezoidal blade and the second trapezoidal blade carry out layered cutting in the vertical direction on the residual soil layer, the pressure and the resistance of the soil layer when cutting the soil layer are greatly reduced, and simultaneously the first trapezoidal blade and the second trapezoidal blade carry out shoveling on the residual soil layer, the soil below the supporting plate can be cleaned in time, the supporting plate can be lowered conveniently, the newly dug vertical shaft can be supported in time by the supporting plate, and trouble is saved conveniently.

2. The invention is characterized in that a first poking block is arranged on the mounting groove, when the mounting block drives a first trapezoidal blade and a second trapezoidal blade to cut off the soil layer downwards, when the mounting block slides to the lower end of a first sliding groove, a second arc-shaped block at one side of a first vertical rod is contacted with a first arc-shaped block at one side of a hanging plate, the first arc-shaped block pushes the first vertical rod, a first sliding block at the upper end of the first vertical rod slides in the second sliding groove, simultaneously the first vertical rod drives the first trapezoidal blade and the second trapezoidal blade to move to push the cut residual soil layer to be close to a second circular pit, at the same time, the first sliding block pushes the second vertical rod to move, when the upper end of the second vertical rod is blocked by the first poking block, the first sliding block continues to slide, the second vertical rod rotates between two vertical plates, the second vertical rod drives the second trapezoidal blade to poke the soil block close to the second circular pit, and poke the soil block into the second circular pit, the cleaning is carried out in time, so that the accumulation of soil is avoided, and the next cleaning is influenced.

3. The invention arranges the sliding rod, when the support plates are connected with each other, the sliding rod on the support plates is inserted into the square groove on the adjacent support plate, the lower surface of the sliding rod is contacted with the cross rod, the adjacent support plate supports the other support plate through the cross rod, when the second sliding block slides in the third sliding groove, the second sliding block drives the rack to move, the rack drives the first gear to rotate, the first gear drives the rotating disc to rotate, the second poking block on the rotating disc pokes the poking rod to rotate, the other end of the poking rod pokes the convex block on the lower surface of the sliding rod to make the sliding rod slide in the sliding hole, the other end of the sliding rod is separated from the cross rod to lose the adjacent support plate, the support plate with the excavated soil on the bottom falls, the process is repeated, the plurality of support plates fall in sequence, the support ring formed by the support plates gradually falls with the deepening of the vertical shaft, the depth is also more and more deep, and the backup pad can always support the shaft lateral wall when the downward excavation shaft, avoids the earth of shaft lateral wall to sink.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a schematic cross-sectional view taken along line a-a in fig. 2.

Fig. 4 is an enlarged schematic view of the structure at E in fig. 3.

Fig. 5 is a schematic structural view of the mounting frame and the first and second trapezoidal blades.

Fig. 6 is a top view of the mounting bracket and the first and second trapezoidal blades.

Fig. 7 is a schematic cross-sectional view taken along line B-B in fig. 6.

Fig. 8 is an enlarged schematic view of F in fig. 7.

Fig. 9 is a schematic view of the connection between the support plates.

Fig. 10 is a schematic view of the usage state of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a subway shaft supporting device as shown in figures 1-10, which comprises a plurality of supporting plates 1, wherein the supporting plates 1 are arc-shaped, a connecting device 5 is arranged between the supporting plates 1, the supporting plates 1 are connected with each other to form a circular ring, the lower end of each supporting plate 1 is provided with a first inclined surface 11, the first inclined surface 11 is adjacent to the bottom surface, the first inclined surface 11 is provided with a mounting frame 2, the mounting frame 2 is provided with a connecting block 12, the mounting frame 2 comprises two mounting plates 22, the two mounting plates 22 are fixed on the first inclined surfaces 11, a threaded rod 23 is rotatably connected on the two mounting plates 22 and is in threaded connection with the connecting block 12, one end of the threaded rod 23 is fixedly connected with a control disc 24, the lower surface of the connecting block 12 is fixedly connected with a hanging plate 13, one side of the hanging plate 13 is provided with a first sliding groove, the mounting block 14 is slidably connected in the first sliding groove, and the bottom surface of the mounting block 14 is provided with a second sliding groove, a first sliding block 15 is connected in the second sliding groove in a sliding manner, the lower surface of the first sliding block 15 is fixedly connected with a first vertical rod 16, the lower end of the first vertical rod 16 is fixedly connected with a first trapezoidal blade 17, the two sides of the upper surface of the first sliding block 15 are fixedly connected with vertical plates 18, the two vertical plates 18 are rotatably connected with a second vertical rod 3, the lower end of the second vertical rod 3 is fixedly connected with a second trapezoidal blade 31, the first vertical rod 16 is overlapped with the second vertical rod 3, the first trapezoidal blade 17 is overlapped with the second trapezoidal blade 31, and the cross sections of the first trapezoidal blade 17 and the second trapezoidal blade 31 are both arc-shaped; the device is used for supporting the well wall after the excavation of a subway shaft, a first round pot hole with a certain depth is excavated in advance on the ground, then a plurality of supporting plates 1 are placed in the round pot hole, the supporting plates 1 are connected with each other to form a supporting ring which can be attached to the side wall of the round pot hole, then a second round pot hole with a certain depth is excavated downwards continuously in the supporting ring, soil with a certain thickness is remained between the second round pot hole and the first round pot hole, the thickness of the soil is the same as that of the supporting plates 1, at the time, a control disc 24 on the inclined surface of one of the supporting plates 1 is rotated to rotate a threaded rod 23, the threaded rod 23 is rotated to move a connecting block 12 on the threaded rod 23, the connecting block 12 drives a first trapezoidal blade 17 and a second trapezoidal blade 31 to reach the position above the middle position of the thickness of the soil layer between the second round pot hole and the first round pot hole, an existing hydraulic jacking device is used for pushing a mounting block 14 downwards, the mounting block 14 drives the first trapezoidal blade 17 and the second trapezoidal blade 31 to move downwards to cut residual soil layers, the second vertical rod 3 is shifted after cutting, the second vertical rod 3 drives the second trapezoidal blade 31 to rotate to shift soil which is just cut, the soil which is just cut is shifted to the second round pot hole to avoid residue, the excavated soil falls in the pot hole in the middle of the support ring, then the control disc 24 is continuously rotated to enable the first trapezoidal blade 17 and the second trapezoidal blade 31 to move to be close to the inner wall of the first round pot hole, then the first trapezoidal blade 17 and the second trapezoidal blade 31 cut the residual soil layers, the second trapezoidal blade 31 rotates to shift the soil which is just cut, the first trapezoidal blade 17 and the second trapezoidal blade 31 are driven to move on the threaded rod 23 through the connecting block 12, and the first trapezoidal blade 17 and the second trapezoidal blade 31 carry out layered cutting in the vertical direction on the residual soil layers, alleviate the pressure and the resistance of soil when excision soil layer greatly, conveniently save trouble, excision back each time, the trapezoidal blade 31 of second can be stirred the soil layer of cutting away in the circular hole of second, in time clear up, avoid earth to pile up, influence clearance next time, backup pad 1 both can support the wall of a well after the shaft excavation, can also clear up 1 below remaining earth of backup pad, can make the earth of backup pad below in time clear up, make things convenient for the backup pad to descend, make the backup pad can in time support the shaft of newly digging, conveniently save trouble, the application is nimble.

A first arc-shaped block 32 is arranged on one side of the hanging plate 13, a second arc-shaped block 33 is fixedly connected on one side of the first vertical rod 16, a first spring 34 is fixedly connected between one side of the first sliding block 15 and the side wall of the second sliding chute, an installation groove 35 is arranged on the upper bottom surface of the second sliding chute, the installation groove 35 is communicated with the second sliding chute, a first toggle block 36 is fixedly connected on the upper bottom surface of the installation groove 35, the upper end of the second vertical rod 3 is positioned in the installation groove 35 and matched with the first toggle block 36, and an operating lever 37 is fixedly connected on one side of the installation block 14; when the mounting block 14 drives the first trapezoidal blade 17 and the second trapezoidal blade 31 to cut off the soil layer downwards, when the mounting block 14 slides to the lower end of the first sliding slot, the second arc-shaped block 33 at one side of the first vertical rod 16 contacts with the first arc-shaped block 32 at one side of the hanging plate 13, the first arc-shaped block 32 pushes the first vertical rod 16, so that the first sliding block 15 at the upper end of the first vertical rod 16 slides in the second sliding slot, meanwhile, the first vertical rod 16 drives the first trapezoidal blade 17 and the second trapezoidal blade 31 to move to push the cut residual soil layer to be close to the second round pot hole, at the moment, the first sliding block 15 pushes the second vertical rod 3 to move, when the upper end of the second vertical rod 3 is blocked by the first shifting block 36, the first sliding block 15 continues to slide at the moment, so that the second vertical rod 3 rotates between the two vertical plates 18, the second vertical rod 3 drives the second trapezoidal blade 31 to shift the soil blocks close to the second circular pot hole, and the soil blocks are shifted into the second circular pot hole.

The lower surface of the supporting plate 1 is fixedly connected with two vertical plates 39, the lower surface of each vertical plate 39 is provided with a third sliding chute, a second sliding block 4 is connected in the third sliding chute in a sliding manner, the lower surface of the second sliding block 4 is fixedly connected with a scraper 41, and the inner walls of the lower ends of the two vertical plates 39 are provided with second inclined planes; after the soil layer below the first inclined plane 11 is cleaned by the first trapezoidal blade 17 and the second trapezoidal blade 31, soil blocks below the bottom surface adjacent to the first inclined plane 11 cannot be cut off by the first trapezoidal blade 17 and the second trapezoidal blade 31 due to position reasons, and then the scraper 41 is pushed by the hydraulic jacking device, which is the prior art and is not described herein in detail, so that the scraper 41 drives the second slider 4 to slide in the third chute, in the moving process, the scraper 41 scrapes the soil blocks between the two vertical plates 39, the soil blocks below the two vertical plates 39 are the second inclined plane due to the inner walls of the lower ends of the two vertical plates 39, the soil blocks below the vertical plates 39 are inwardly extruded by the second inclined plane, the extruded soil blocks are scraped to one side by the scraper 41, and the residual soil blocks are further cleaned by the scraper 41.

The connecting device 5 comprises a sliding rod 51, one side of the support plate 1 is provided with a sliding hole, the sliding rod 51 is positioned in the sliding hole and is in sliding connection with the support plate 1, a second spring 52 is fixedly connected between one end of the sliding rod 51 and the side wall of the sliding hole, the other side of the support plate 1 is provided with a square groove 63, the square groove 63 is matched with the sliding rod 51, a cross rod 64 is fixedly connected in the square groove 63, and the cross rod 64 is positioned in the middle of the square groove 63; when the support plates 1 are coupled to each other, the sliding rods 51 of the support plates 1 are inserted into the square grooves 63 of the adjacent support plates 1, the lower surfaces of the sliding rods 51 contact the cross bars 64, and the adjacent support plates 1 support the other support plate 1 via the cross bars 64.

An inner cavity 53 is formed in the supporting plate 1, the inner cavity 53 is communicated with the third sliding chute and the sliding hole, a rack 54 is fixedly connected to the upper surface of the second sliding block 4, a first fixing shaft 55 is rotatably connected to the inner cavity 53, a first gear 56 is fixedly connected to the outer circle of the first fixing shaft 55, the first gear 56 is meshed with the rack 54, a rotating disc 57 is fixedly connected to the outer circle of the first fixing shaft 55, a plurality of second poking blocks 58 are fixedly connected to the outer circle of the rotating disc 57, a second fixing shaft 6 is fixedly connected to the inner wall of the inner cavity 53, a poking rod 61 is rotatably connected to the outer circle of the second fixing shaft 6, one end of the poking rod 61 is matched with the second poking block 58, a convex block 62 is fixedly connected to the lower surface of the sliding rod 51, the convex block 62 is matched with the other end of the poking rod 61, and one end of the sliding rod 51 is rotatably connected with a one-way rotating rod 65; the second sliding block 4 is pushed to slide in the third sliding groove by the existing hydraulic jacking device, the second sliding block 4 drives the rack 54 to move, the rack 54 drives the first gear 56 to rotate, the first gear 56 drives the rotating disc 57 to rotate, the second poking block 58 on the rotating disc 57 pokes the poking rod 61 to rotate, the other end of the poking rod 61 pokes the convex block 62 on the lower surface of the sliding rod 51, the sliding rod 51 slides in the sliding hole, the other end of the sliding rod 51 is separated from the contact with the cross rod 64, the adjacent supporting plate 1 is not supported, so that the excavated supporting plate 1 of the bottom soil falls, the sliding rod 51 on the excavated supporting plate 1 of the bottom soil is inserted between the cross rod 64 and the bottom surface of the square groove 63 under the action of the second spring 52, after the excavated soil on the bottom of the adjacent supporting plate 1, the processes are repeated, when the adjacent supporting plate 1 falls, because the one end of the slide bar 51 on the backup pad 1 that has fallen rotates and connects one-way dwang 65, one-way dwang 65 rotates, dodges horizontal pole 64 on the adjacent backup pad 1, so a plurality of backup pads 1 fall in proper order, and along with the shaft is more and more dark, fall gradually by the support ring that backup pad 1 formed, the degree of depth is also more and more dark, makes when the downward excavation shaft, and backup pad 1 can support the shaft lateral wall always, avoids the earth of shaft lateral wall to sink.

When the device is used, the plurality of supporting plates 1 are connected with each other to form a supporting ring which can be attached to the side wall of the circular pot hole, the control panel 24 on the inclined plane of one of the supporting plates 1 is rotated to rotate the threaded rod 23, the threaded rod 23 is rotated to move the connecting block 12 on the threaded rod 23, the connecting block 12 drives the first trapezoidal blade 17 and the second trapezoidal blade 31 to reach the upper part of the middle position of the thickness of the soil layer between the second circular pot hole and the first circular pot hole, the mounting block 14 is pushed downwards, the mounting block 14 drives the first trapezoidal blade 17 and the second trapezoidal blade 31 to move downwards to cut the residual soil layer, when the mounting block 14 slides to the lower end of the first sliding groove, the second arc-shaped block 33 on one side of the first vertical rod 16 is contacted with the first arc-shaped block 32 on one side of the hanger plate 13, the first arc-shaped block 32 pushes the first vertical rod 16 to enable the first sliding block 15 on the upper end of the first vertical rod 16 to slide in the second sliding groove, meanwhile, the first vertical rod 16 drives the first trapezoidal blade 17 and the second trapezoidal blade 31 to move to push the cut residual soil layer to be close to the second round pot hole, the hydraulic jacking device pushes the scraper 41, so that the scraper 41 drives the second sliding block 4 to slide in the third sliding groove, the scraper 41 scrapes off the soil blocks between the two vertical plates 39, when the second sliding block 4 slides in the third sliding chute, the second sliding block 4 drives the rack 54 to move, the rack 54 drives the first gear 56 to rotate, the first gear 56 drives the rotating disc 57 to rotate, the second poking block 58 on the rotating disc 57 pokes the poking rod 61 to rotate, the other end of the poking rod 61 pokes the convex block 62 on the lower surface of the sliding rod 51, so that the sliding rod 51 slides in the sliding hole, the other end of the sliding rod 51 is separated from the cross rod 64 to be in contact with the cross rod, the adjacent supporting plate 1 is not supported, and the supporting plate 1 with the bottom soil dug out falls.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A subway shaft strutting arrangement, includes a plurality of backup pads (1), its characterized in that: the supporting plates (1) are arc-shaped, a connecting device (5) is arranged between the supporting plates (1), the supporting plates (1) are connected with each other to form a circular ring, a first inclined surface (11) is arranged at the lower end of the supporting plate (1), the first inclined surface (11) is adjacent to the bottom surface, a mounting frame (2) is arranged on the first inclined surface (11), a connecting block (12) is arranged on the mounting frame (2), a hanging plate (13) is fixedly connected to the lower surface of the connecting block (12), a first sliding groove is arranged on one side of the hanging plate (13), a mounting block (14) is slidably connected in the first sliding groove, a second sliding groove is arranged on the bottom surface of the mounting block (14), a first sliding block (15) is slidably connected in the second sliding groove, a first vertical rod (16) is fixedly connected to the lower surface of the first sliding block (15), and a first trapezoidal blade (17) is fixedly connected to the lower end of the first vertical rod (16), the equal fixed connection riser (18) in both sides of the upper surface of first slider (15), two rotate between riser (18) and connect second montant (3), the trapezoidal blade of lower extreme fixed connection second (31) of second montant (3), first montant (16) and second montant (3) coincide mutually, first trapezoidal blade (17) and the trapezoidal blade of second (31) coincide mutually.

2. A subway shaft support as claimed in claim 1, wherein: mounting bracket (2) includes two mounting panels (22), two mounting panel (22) are fixed on first inclined plane (11), two rotate connecting threaded rod (23) on mounting panel (22), threaded rod (23) and connecting block (12) threaded connection, one end fixed connection control panel (24) of threaded rod (23).

3. A subway shaft support as claimed in claim 1, wherein: one side of hanger plate (13) is equipped with first arc piece (32), one side fixed connection second arc piece (33) of first montant (16), first spring of fixed connection (34) between one side of first slider (15) and the lateral wall of second spout, the last bottom surface of second spout is equipped with mounting groove (35), mounting groove (35) communicate with each other with the second spout, the first piece (36) of stirring of last bottom surface fixed connection of mounting groove (35), the upper end of second montant (3) is located mounting groove (35) and cooperatees with first piece (36) of stirring, one side fixed connection control rod (37) of installation piece (14).

4. A subway shaft support as claimed in claim 1, wherein: the cross sections of the first trapezoidal blade (17) and the second trapezoidal blade (31) are both arc-shaped.

5. A subway shaft support as claimed in claim 1, wherein: the lower surface of the supporting plate (1) is fixedly connected with two vertical plates (39), the lower surfaces of the vertical plates (39) are provided with third sliding grooves, second sliding blocks (4) are connected in the third sliding grooves in a sliding mode, the lower surfaces of the second sliding blocks (4) are fixedly connected with scrapers (41), and second inclined planes are arranged on the inner walls of the lower ends of the vertical plates (39).

6. A subway shaft support as claimed in claim 1, wherein: connecting device (5) include slide bar (51), one side of backup pad (1) is equipped with the slide opening, slide bar (51) be located the slide opening and with backup pad (1) sliding connection, fixed connection second spring (52) between the one end of slide bar (51) and the slide opening lateral wall, the opposite side of backup pad (1) is equipped with square groove (63), square groove (63) cooperate with slide bar (51), fixed connection horizontal pole (64) in square groove (63), horizontal pole (64) are located square groove (63) middle part position.

7. A subway shaft support as claimed in claim 1, wherein: the inner cavity (53) is arranged in the support plate (1), the inner cavity (53) is communicated with the third sliding groove and the sliding hole, the upper surface of the second sliding block (4) is fixedly connected with the rack (54), the inner cavity (53) is rotatably connected with the first fixing shaft (55), the outer circle of the first fixing shaft (55) is fixedly connected with the first gear (56), the first gear (56) is meshed with the rack (54), the outer circle of the first fixing shaft (55) is fixedly connected with the rotating disc (57), the outer circle of the rotating disc (57) is fixedly connected with the plurality of second poking blocks (58), the inner wall of the inner cavity (53) is fixedly connected with the second fixing shaft (6), the outer circle of the second fixing shaft (6) is rotatably connected with the poking rod (61), one end of the poking rod (61) is matched with the second poking block (58), and the lower surface of the sliding rod (51) is fixedly connected with the convex block (62), the convex block (62) is matched with the other end of the poke rod (61).

8. A subway shaft support as claimed in claim 6, wherein: one end of the sliding rod (51) is rotatably connected with the unidirectional rotating rod (65).