CN114233345A - Subway tunnel anti-collapse square structure and corresponding construction method thereof - Google Patents
Subway tunnel anti-collapse square structure and corresponding construction method thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/545—Details of the ends of props hydraulic or pneumatic
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Abstract
The invention belongs to the technical field of subway tunnel anti-collapse structures, and particularly relates to a subway tunnel anti-collapse structure and a corresponding construction method thereof. The lifting device can control the supporting plate to lift, so that a user can adjust the height of the supporting plate according to needs, and the device can control the permanent magnet pressing plate to impact each inserted rod in a reciprocating mode, so that the inserted rods can be rapidly inserted into the ground, and the complexity and labor loss caused by manual knocking of the inserted rods and the ground are avoided.
Description
Technical Field
The invention belongs to the technical field of subway tunnel anti-collapse structures, and particularly relates to a subway tunnel anti-collapse structure and a corresponding construction method thereof.
Background
The tunnel is an engineering building buried in the ground, and is a form of utilizing underground space by human beings, the tunnel can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and a military tunnel, the subway is rapid, large-traffic and electric power traction rail transit built in a city, a train runs on a totally closed line, and the line located in a central urban area is basically arranged in the underground tunnel.
At present, subway tunnel can often use at the in-process of construction and prevent that the square structure of collapsing provides the support to subway tunnel's roof, prevents collapsing, and the tradition is prevented that structural backup pad of collapsing generally is fixed to be set up on the support frame, at the in-process that uses, can not adjust the height of backup pad as required, and it is inconvenient to have brought for the use, and the tradition prevents that the square structure of collapsing when fixed, generally needs the manual work to strike each inserted bar and inserts with ground and close, realizes preventing the fixed of square structure of collapsing, and whole process comparatively consumes the manpower.
Therefore, we propose an anti-collapse structure of a subway tunnel and a corresponding construction method to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems and provides an anti-collapse structure of a subway tunnel and a corresponding construction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: a subway tunnel anti-collapse structure comprises a base, wherein a cavity is formed in the base, an electromagnetic plate is embedded in the cavity, the electromagnetic plate is fixedly connected with a permanent magnetic pressing plate through a plurality of reset springs and is in sliding connection with the cavity, a plurality of sliding cavities are formed in the lower end of the base, inserting rods matched with the permanent magnetic pressing plate are in sliding connection in the sliding cavities, clamping mechanisms matched with the inserting rods are arranged on the inner walls of the two sides of each sliding cavity, an intermittent control mechanism electrically connected with the electromagnetic plate is arranged on the side wall of one side of the base, a support is fixedly connected to the base, two lead screws are rotatably connected between the support and the base, a sliding plate is connected to the support in a sliding mode and is in threaded connection with the two lead screws, two support rods are fixedly connected to the sliding plate, and a support plate is fixedly connected to the upper ends of the two support rods and penetrates through the support and is fixedly connected with the support plate together, the support is provided with a driving mechanism matched with the two lead screws, and a plurality of universal wheels are arranged around the base.
In foretell subway tunnel prevents that collapse square structure, fixture comprises electromagnetism piece, permanent magnetism piece, support the piece and clamp splice, seted up the electromagnetism chamber on the inner wall of one side in smooth chamber, and the electromagnetism piece inlays and locates and set up in the electromagnetism chamber, the electromagnetism piece is through a plurality of extension spring and permanent magnetism piece fixed connection, support the piece and fix and set up on the permanent magnetism piece, and support the one end of piece and extend to in the smooth chamber and with clamp splice fixed connection, the clamp splice offsets with the inserted bar and sets up.
In foretell subway tunnel prevents square structure that collapses, intermittent control mechanism has control box, pivot, initiative bevel gear, driven bevel gear, micro motor, conducting block, arc conducting strip to constitute, the control box is fixed to be set up on one side lateral wall of base, and the pivot rotates and sets up in the control box, driven bevel gear is fixed to be cup jointed in the pivot, the initiative bevel gear rotates and sets up in the control box, and the initiative bevel gear meshes with driven bevel gear mutually, initiative bevel gear's transmission shaft and micro motor transmission are connected, conducting block fixed connection is in the lower extreme of pivot, and has seted up the annular spout with conducting block matched with on the interior bottom surface of control box, the arc conducting strip inlays and locates in the annular spout, and the arc conducting strip is connected with the conducting block contact, arc conducting strip and electromagnetic plate electric connection.
In foretell subway tunnel prevents that collapse structure, actuating mechanism comprises worm, two worm wheels and driving motor, the worm rotates and sets up on the support, and the one end and the driving motor transmission of worm are connected, two the worm wheel is fixed respectively to be cup jointed on the lead screw that corresponds, and two worm wheels all mesh with the worm mutually.
In foretell subway tunnel prevents square structure that collapses, fixedly connected with and universal wheel matched with containing box on the base, and the fixed cylinder that is provided with in the containing box, the output and the universal wheel fixed connection of cylinder.
In the anti-collapse square structure of the subway tunnel, the lower end of the permanent magnet pressing plate is fixedly connected with a convex block corresponding to the inserted bar, and the convex block is in contact connection with the top end of the inserted bar.
In foretell subway tunnel prevents that collapse structure, two the common fixedly connected with buffer board in upper end of bracing piece, and the buffer board passes through a plurality of shell fragments and backup pad fixed connection.
In the anti-collapse structure of the subway tunnel, the gear ratio of the driving bevel gear to the driven bevel gear is 1:2, and the arc length of the arc-shaped conducting strip is half of the perimeter of the annular sliding groove.
A construction method of an anti-collapse square structure of a subway tunnel comprises the following steps:
s1, firstly, moving the device to a target point through each universal wheel, then, starting each air cylinder to enable the output end of each air cylinder to drive the universal wheel to be folded, when each universal wheel is stored in a storage box, closing each air cylinder, then controlling each electromagnetic block to be electrified and magnetized through a switch, attracting the permanent magnet after the electromagnetic block is electrified and magnetized, and enabling the permanent magnet to drive the clamping block to be far away from the inserted link through the abutting block, so as to realize unlocking of the inserted link;
s2, starting a micro motor, wherein the micro motor can drive a driving bevel gear to rotate, after the driving bevel gear rotates, a driven bevel gear can drive a conductive block to rotate, so that the conductive block slides in an annular sliding groove, along with the sliding of the conductive block, the conductive block can be in contact with an arc-shaped conductive sheet in a reciprocating mode, and further, an electromagnetic plate can be intermittently electrified;
s3, when the inserted bar is inserted completely and is located in the ground, close micro motor, then, start driving motor, driving motor can drive the worm and rotate, the worm rotates the back, can drive two lead screws through two worm wheels and rotate, two lead screws rotate the back, can make the slide constantly go up, the slide can drive the backup pad through two bracing pieces and rise, when the backup pad offseted with subway tunnel roof, close driving motor, this moment, accomplish the support to subway tunnel promptly.
Compared with the prior art, the invention has the beneficial effects that: through the actuating mechanism who sets up, can drive two lead screws and rotate in step, the cost of addding drive equipment in addition has been avoided, can control the slide and go up and down in the time of through, and then can adjust the height of backup pad as required, through the intermittent control mechanism who sets up, can control electromagnetic plate intermittent type circular telegram, and then make the electromagnetic plate can reciprocal actuation permanent magnetism clamp plate, under reset spring's cooperation, can make the reciprocal each inserted bar of striking of permanent magnetism clamp plate, and then the inserted bar of being convenient for is inserted with ground and is closed, the loaded down with trivial details that the inserted bar was inserted with ground to artifical striking has been avoided, through the cylinder that sets up, can regulate and control the universal wheel and stretch out and draw back, make when carrying out the operation, can pack up the universal wheel, and in the later stage, can jack up the base, be convenient for control the inserted bar and ground separation.
In summary, the following steps: through the design of the invention, the supporting plate can be controlled to lift, so that a user can adjust the height of the supporting plate as required, and the permanent magnet pressing plate can be controlled to impact each inserted rod in a reciprocating manner, so that the inserted rods can be rapidly inserted into the ground, and the complexity and labor loss caused by manually knocking the inserted rods to be inserted into the ground are avoided.
Drawings
FIG. 1 is a schematic view of an elevational perspective structure of an anti-collapse structure of a subway tunnel and a corresponding construction method thereof provided by the invention;
FIG. 2 is a schematic view of the internal structure of a control box of the subway tunnel anti-collapse structure and a corresponding construction method thereof provided by the invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 4 is an enlarged view of the structure at B in FIG. 1;
fig. 5 is an enlarged schematic view of the structure at C in fig. 1.
In the figure: the device comprises a base 1, an electromagnetic plate 2, a reset spring 3, a permanent magnetic press plate 4, a sliding cavity 5, an inserting rod 6, a clamping mechanism 7, an electromagnetic block 71, a permanent magnetic block 72, a butting block 73, a clamping block 74, an intermittent control mechanism 8, a control box 81, a rotating shaft 82, a driving bevel gear 83, a driven bevel gear 84, a micro motor 85, a conductive block 86, an arc conductive plate 87, a support 9, a lead screw 10, a sliding plate 11, a support rod 12, a support plate 13, a driving mechanism 14, a worm 141, a worm wheel 142, a driving motor 143, a universal wheel 15, an electromagnetic cavity 16, an extension spring 17, an annular sliding groove 18, a storage box 19, a cylinder 20, a bump 21, a buffer plate 22, a spring plate 23 and a cavity 24.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
As shown in fig. 1-5, a subway tunnel anti-collapse square structure comprises a base 1, a cavity 24 is formed in the base 1, an electromagnetic plate 2 is embedded in the cavity 24, the electromagnetic plate 2 is fixedly connected with a permanent magnetic pressure plate 4 through a plurality of reset springs 3, the permanent magnetic pressure plate 4 is slidably connected with the cavity 24, a plurality of sliding cavities 5 are formed in the lower end of the base 1, insertion rods 6 matched with the permanent magnetic pressure plate 4 are slidably connected in the sliding cavities 5, lugs 21 corresponding to the insertion rods 6 are fixedly connected with the lower end of the permanent magnetic pressure plate 4, the lugs 21 are in contact connection with the top ends of the insertion rods 6, and the arrangement of the lugs 21 can reduce the contact area between the permanent magnetic pressure plate 4 and the insertion rods 6, so that the pressure between the insertion rods 6 and the lugs 21 in the insertion process is increased, the effect of the pressure is more obvious, and the insertion effect of the insertion rods 6 is improved.
The inner walls of two sides of the sliding cavity 5 are provided with clamping mechanisms 7 matched with the inserted rod 6, each clamping mechanism 7 is composed of an electromagnetic block 71, a permanent magnet block 72, a supporting block 73 and a clamping block 74, the inner wall of one side of the sliding cavity 5 is provided with the electromagnetic cavity 16, the electromagnetic block 71 is embedded in the electromagnetic cavity 16 and is arranged, the electromagnetic block 71 is fixedly connected with the permanent magnet blocks 72 through a plurality of extension springs 17, the supporting block 73 is fixedly arranged on the permanent magnet blocks 72, one end of the supporting block 73 extends into the sliding cavity 5 and is fixedly connected with the clamping block 74, the clamping block 74 is abutted against the inserted rod 6, the electromagnetic block 71 is arranged, the magnetic change of the electricity on and off of the electromagnetic block 71 can be utilized, the permanent magnet blocks 72 and the extension springs 17 are matched, the clamping block 74 is controlled to stretch, the locking or unlocking of the inserted rod 6 can be controlled, and the inserted rod 6 can be locked and prevented from sliding out when the device is moved.
An intermittent control mechanism 8 electrically connected with the electromagnetic plate 2 is arranged on one side wall of the base 1, the intermittent control mechanism 8 comprises a control box 81, a rotating shaft 82, a driving bevel gear 83, a driven bevel gear 84, a micro motor 85, a conductive block 86 and an arc-shaped conductive sheet 87, the control box 81 is fixedly arranged on one side wall of the base 1, the rotating shaft 82 is rotatably arranged in the control box 81, the driven bevel gear 84 is fixedly sleeved on the rotating shaft 82, the driving bevel gear 83 is rotatably arranged in the control box 81, the driving bevel gear 83 is meshed with the driven bevel gear 84, a transmission shaft of the driving bevel gear 83 is in transmission connection with the micro motor 85, the conductive block 86 is fixedly connected to the lower end of the rotating shaft 82, an annular sliding groove 18 matched with the conductive block 86 is formed in the inner bottom surface of the control box 81, the arc-shaped conductive sheet 87 is embedded in the annular sliding groove 18, and the arc-shaped conductive sheet 87 is in contact connection with the conductive block 86, arc conducting strip 87 and electromagnetism board 2 electric connection, through the drive bevel gear 83 that sets up and the drive cooperation of driven bevel gear 84, the micro motor 85 drive conducting block 86 of being convenient for rotates for conducting block 86 can slide in annular spout 18, and then makes conducting block 86 reciprocal and the butt joint of arc conducting strip 87, realizes the intermittent type circular telegram of electromagnetism board 2.
The gear ratio of the driving bevel gear 83 to the driven bevel gear 84 is 1:2, the arc length of the arc conducting strip 87 is half of the circumference of the annular chute 18, the number of teeth of the driven bevel gear 84 is designed, the rotating speed of the conducting block 86 can be reduced, so that the electromagnetic plate 2 has enough time for magnetic conversion, the base 1 is fixedly connected with a bracket 9, two lead screws 10 are rotatably connected between the bracket 9 and the base 1, the bracket 9 is slidably connected with a sliding plate 11, the sliding plate 11 is connected with the two screw rods 10 by screw threads, the sliding plate 11 is fixedly connected with two supporting rods 12, the upper ends of the two support rods 12 penetrate through the bracket 9 and are fixedly connected with a support plate 13 together, the upper ends of the two support rods 12 are fixedly connected with a buffer plate 22 together, and the buffer plate 22 is fixedly connected with the support plate 13 through a plurality of elastic sheets 23, and the buffer plate 22 and the elastic sheets 23 are matched, so that the support plate 13 can be prevented from being rigidly contacted with the top wall of the subway tunnel.
The driving mechanism 14 matched with the two lead screws 10 is arranged on the support 9, the driving mechanism 14 is composed of a worm 141, two worm wheels 142 and a driving motor 143, the worm 141 is rotatably arranged on the support 9, one end of the worm 141 is in transmission connection with the driving motor 143, the two worm wheels 142 are respectively and fixedly sleeved on the corresponding lead screws 10, the two worm wheels 142 are all meshed with the worm 141, through the transmission matching of the arranged worm 141 and the two worm wheels 142, the driving motor 143 is convenient for driving the two lead screws 10 to synchronously rotate, and the cost of additionally arranging a driving device is avoided.
Be provided with a plurality of universal wheels 15 around base 1, fixedly connected with and universal wheel 15 matched with containing box 19 on the base 1, and fixedly in the containing box 19 be provided with cylinder 20, the output and the universal wheel 15 fixed connection of cylinder 20, can control universal wheel 15 through the cylinder 20 that sets up and stretch out and draw back, make when supporting the operation, can pack up universal wheel 15, improve the steadiness that the device placed, and simultaneously, can control base 1 to rise at the later stage, separate with ground with each inserted bar 6 of control, so that the user dismounting device.
The operating principle of the present invention will now be described as follows:
when the device is used, firstly, the device is moved to a target point through each universal wheel 15, then, each cylinder 20 is started, the output end of each cylinder 20 drives the universal wheel 15 to be folded, when each universal wheel 15 is contained in the containing box 19, each cylinder 20 is closed, each electromagnetic block 71 is controlled to be electrified and magnetized through a switch, the permanent magnet 72 can be attracted after the electromagnetic block 71 is electrified and magnetized, the permanent magnet 72 can drive the clamping block 74 to be far away from the inserted link 6 through the abutting block 73, and the unlocking of the inserted link 6 is realized.
Then, when the micro motor 85 is started, the micro motor 85 drives the driving bevel gear 83 to rotate, and after the driving bevel gear 83 rotates, the driven bevel gear 84 drives the conductive block 86 to rotate, so that the conductive block 86 slides in the annular sliding slot 18, and along with the sliding of the conductive block 86, the conductive block 86 will contact with the arc-shaped conductive sheet 87 in a reciprocating manner, thereby leading the electromagnetic plate 2 to be capable of being electrified intermittently, leading the electromagnetic plate 2 to attract the permanent magnet pressure plate 4 after being electrified and magnetized, leading the permanent magnet pressure plate 4 to drive each lug 21 to rise, meanwhile, the permanent magnet pressure plate 4 can press each reset spring 3, so that each reset spring 3 can store energy, when the electromagnetic plate 2 is powered off and demagnetized, each return spring 3 will release energy, so that the permanent magnetic pressure plate 4 drives each lug 21 to strike each inserted rod 6, further, with the intermittent energization of the electromagnetic plate 2, the projection 21 will impact the plunger 6 to make the plunger 6 engage with the ground.
When inserting rod 6 is inserted completely and is located in ground, micro motor 85 is closed, then, driving motor 143 is started, driving motor 143 can drive worm 141 and rotate, after worm 141 rotates, can drive two lead screws 10 through two worm gears 142 and rotate, after two lead screws 10 rotate, can make slide plate 11 slide on constantly, slide plate 11 can drive backup pad 13 through two bracing pieces 12 and rise, when backup pad 13 offsets with subway tunnel roof, closing driving motor 143, at this moment, accomplish the support to subway tunnel promptly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a subway tunnel prevents square structure that collapses, includes base (1), its characterized in that, cavity (24) have been seted up on base (1), and inlay in cavity (24) and be equipped with electromagnetic plate (2), electromagnetic plate (2) are through a plurality of reset spring (3) fixedly connected with permanent magnetism clamp plate (4), and permanent magnetism clamp plate (4) and cavity (24) sliding connection, the lower extreme of base (1) has seted up a plurality of sliding chamber (5), and sliding chamber (5) in sliding connection have with permanent magnetism clamp plate (4) matched with inserted bar (6), the both sides inner wall of sliding chamber (5) all is provided with clamping mechanism (7) with inserted bar (6) matched with, one side lateral wall of base (1) is provided with intermittent type control mechanism (8) with electromagnetic plate (2) electric connection, fixedly connected with support (9) on base (1), it is connected with two lead screws (10) to rotate between support (9) and base (1), sliding connection has slide (11) on support (9), and slide (11) and two lead screw (10) threaded connection, two bracing pieces of fixedly connected with (12) are gone up in slide (11), and the upper end of two bracing pieces (12) all runs through support (9) and common fixedly connected with backup pad (13), be provided with on support (9) with two lead screw (10) matched with actuating mechanism (14), be provided with a plurality of universal wheels (15) around base (1).
2. The subway tunnel anti-collapse structure according to claim 1, wherein the clamping mechanism (7) is composed of an electromagnetic block (71), a permanent magnet block (72), a resisting block (73) and a clamping block (74), the electromagnetic cavity (16) is formed in the inner wall of one side of the sliding cavity (5), the electromagnetic block (71) is embedded in the electromagnetic cavity (16) and arranged, the electromagnetic block (71) is fixedly connected with the permanent magnet block (72) through a plurality of stretching springs (17), the resisting block (73) is fixedly arranged on the permanent magnet block (72), one end of the resisting block (73) extends into the sliding cavity (5) and is fixedly connected with the clamping block (74), and the clamping block (74) is abutted to the insertion rod (6).
3. The subway tunnel anti-collapse structure according to claim 1, wherein said intermittent control mechanism (8) comprises a control box (81), a rotating shaft (82), a driving bevel gear (83), a driven bevel gear (84), a micro motor (85), a conductive block (86) and an arc conductive sheet (87), said control box (81) is fixedly arranged on one side wall of the base (1), and the rotating shaft (82) is rotatably arranged in the control box (81), said driven bevel gear (84) is fixedly connected to the rotating shaft (82), said driving bevel gear (83) is rotatably arranged in the control box (81), and the driving bevel gear (83) is engaged with the driven bevel gear (84), the transmission shaft of said driving bevel gear (83) is in transmission connection with the micro motor (85), said conductive block (86) is fixedly connected to the lower end of the rotating shaft (82), and the inner bottom surface of the control box (81) is provided with an annular sliding groove (18) matched with the conductive block (86), the arc-shaped conductive sheet (87) is embedded in the annular sliding groove (18), the arc-shaped conductive sheet (87) is in contact connection with the conductive block (86), and the arc-shaped conductive sheet (87) is electrically connected with the electromagnetic plate (2).
4. The subway tunnel anti-collapse structure according to claim 1, wherein said driving mechanism (14) is composed of a worm (141), two worm gears (142) and a driving motor (143), said worm (141) is rotatably disposed on the support (9), and one end of the worm (141) is in transmission connection with the driving motor (143), said two worm gears (142) are respectively fixedly sleeved on the corresponding lead screws (10), and both worm gears (142) are engaged with the worm (141).
5. The subway tunnel anti-collapse structure according to claim 1, wherein a containing box (19) matched with the universal wheels (15) is fixedly connected to the base (1), an air cylinder (20) is fixedly arranged in the containing box (19), and an output end of the air cylinder (20) is fixedly connected with the universal wheels (15).
6. The subway tunnel anti-collapse structure according to claim 1, wherein the lower end of said permanent magnetic pressure plate (4) is fixedly connected with a projection (21) corresponding to the inserted bar (6), and the projection (21) is in contact connection with the top end of the inserted bar (6).
7. The subway tunnel anti-collapse structure according to claim 1, wherein the upper ends of two said support rods (12) are fixedly connected with a buffer plate (22) together, and the buffer plate (22) is fixedly connected with the support plate (13) through a plurality of elastic sheets (23).
8. The subway tunnel anti-collapse structure as claimed in claim 3, wherein the gear ratio of said driving bevel gear (83) to said driven bevel gear (84) is 1:2, and the arc length of said arc-shaped conducting strip (87) is half of the circumference of said annular chute (18).
9. A construction method of a subway tunnel anti-collapse structure according to any one of claims 1 to 8, characterized in that said construction method comprises the steps of:
s1, firstly, the device is moved to a target point through each universal wheel (15), then, each air cylinder (20) is started, the output end of each air cylinder (20) drives the universal wheel (15) to be folded, when each universal wheel (15) is stored in the storage box (19), each air cylinder (20) is closed, each electromagnetic block (71) is controlled to be electrified to generate magnetism through a switch, after the electromagnetic block (71) is electrified to generate magnetism, the permanent magnetic block (72) can be attracted, so that the permanent magnetic block (72) can drive the clamping block (74) to be far away from the inserted link (6) through the abutting block (73), and unlocking of the inserted link (6) is realized;
s2, starting a micro motor (85), wherein the micro motor (85) drives a driving bevel gear (83) to rotate, after the driving bevel gear (83) rotates, a conductive block (86) is driven to rotate through a driven bevel gear (84), so that the conductive block (86) slides in an annular sliding groove (18), along with the sliding of the conductive block (86), the conductive block (86) can contact with an arc-shaped conductive sheet (87) in a reciprocating manner, so that an electromagnetic plate (2) can be electrified intermittently, after the electromagnetic plate (2) is electrified and magnetized, the permanent magnetic pressure plate (4) can be attracted, so that the permanent magnetic pressure plate (4) can drive each lug (21) to rise, meanwhile, the permanent magnetic pressure plate (4) can press each reset spring (3) to store energy, after the electromagnetic plate (2) is de-electrified and de-magnetized, each reset spring (3) can release energy, so that the permanent magnetic pressure plate (4) drives each lug (21) to impact each inserted rod (6), then, with the intermittent electrification of the electromagnetic plate (2), the lug (21) can impact the inserted rod (6) in a reciprocating manner, so that the inserted rod (6) is inserted into the ground;
s3, when inserted bar (6) were inserted completely and were located in ground, close micro motor (85), then, start driving motor (143), driving motor (143) can drive worm (141) and rotate, worm (141) rotate the back, can drive two lead screw (10) through two worm wheel (142) and rotate, two lead screw (10) rotate the back, can make slide (11) constantly go up, slide (11) can drive backup pad (13) through two bracing pieces (12) and rise, when backup pad (13) offseted with subway tunnel roof, close driving motor (143), at this moment, accomplish the support to the subway tunnel promptly.
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| CN202111562439.XA CN114233345B (en) | 2021-12-20 | 2021-12-20 | Subway tunnel collapse prevention structure and corresponding construction method thereof |
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| CN202111562439.XA CN114233345B (en) | 2021-12-20 | 2021-12-20 | Subway tunnel collapse prevention structure and corresponding construction method thereof |
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| CN114233345B (en) | 2023-09-15 |
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