Construction method and construction equipment for reinforcing roadbed in permafrost region by using powder spraying piles

Abstract

The invention discloses a construction method and construction equipment for reinforcing a permafrost region roadbed by utilizing powder spraying piles, and relates to the technical field of highway construction, the construction method comprises the following steps: step 1, two rows of cement powder spraying pile waterproof curtains are longitudinally arranged at the slope toe of the existing roadbed through a powder spraying pile drilling machine, the pile diameter of the cement powder spraying piles is 50cm, the pile distance is 40cm, and the pile length is 6m; secondly, in order to achieve water stop and seepage prevention of the powder spraying piles, 10 cm is reserved for the cement powder spraying piles for inter-pile meshing control; a raw powder spraying pile technology is applied to water stopping on the two sides of the plateau frozen soil roadbed, longitudinal cement powder spraying piles are additionally arranged on the two sides of a roadbed slope toe in the original technology, the cement powder spraying piles are used for meshing, the influence of water on the roadbed after underground frozen soil outside the roadbed melts is prevented, and the water stopping and water resisting effects are achieved in the mode of reducing underground water flowing and heat exchange. Meanwhile, dewatering wells are arranged on two sides of the roadbed to reduce moisture in the roadbed. The process enables the roadbed structure to be more stable, and prolongs the service life of the road.

Description

Technical Field

[0001] The invention relates to the technical field of highway construction, in particular to a construction method and construction equipment for reinforcing a roadbed in a frozen soil area by using powder injection piles. Background Art

[0002] Affected by global warming, the permafrost on the Qinghai-Tibet Plateau has undergone significant degradation, manifested in rising ground temperature, increased thickness of the active layer, thinning of the permafrost layer, and slow melting of long-buried underground ice. Since 2002, the ground temperature of the permafrost layer at a depth of 10 to 20 meters has increased at a rate of 0.02 to 0.78 degrees Celsius every 10 years, which has directly led to the further aggravation of highway diseases in many frozen soil sections. Diseases such as settlement, slurrying and cracks have occurred more frequently and seriously, especially the driving quality of expressways has been further reduced. Therefore, in order to overcome the influence of the above-mentioned adverse factors on the roadbed, a cement powder spray pile roadbed water-stopping process method is provided, which can not only reinforce the plateau high-ice content roadbed, reduce the disturbance of the freeze-thaw cycle to the frozen soil roadbed, but also reduce the cost and shorten the construction period. At the same time, the powder spray pile needs to use a powder spray drill during the construction process. When the traditional powder spray drill is used, a large amount of dust is generated, which affects the construction environment, and the holes on the drill rod are easily blocked. Therefore, we proposed a construction method and construction equipment for reinforcing the roadbed in the frozen soil area using powder spray piles. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a construction method and construction equipment for reinforcing a roadbed in a frozen soil area using powder injection piles, which solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, the present invention is implemented by the following technical scheme: a construction method for reinforcing a roadbed in a frozen soil area by using powder injection piles, comprising the following steps:

[0005] Step 1: Use a cement spray pile drilling rig to longitudinally set two rows of cement spray pile water-stop curtains at the foot of the existing roadbed slope. The cement spray piles have a diameter of 50cm, a pile spacing of 40cm, and a pile length of 6m;

[0006] Step 2: To achieve water-stopping and anti-seepage of cement spray piles, 10cm is reserved for inter-pile bite control of cement spray piles;

[0007] Step 3: Set up D60 drainage wells on both sides of the roadbed to eliminate the boundary conditions caused by incomplete closure of both ends of the powder injection piles.

[0008] A construction equipment for reinforcing a roadbed in a frozen soil area by using powder injection piles, comprising a powder injection pile drilling rig, the powder injection pile drilling rig comprising a drilling rig base, vertical plates are installed on both sides of the upper surface of the drilling rig base, a driving mechanism is provided on the vertical plates, a drill rod mechanism is installed on the driving mechanism, a straightening mechanism is installed inside the drilling rig base and on the driving mechanism, a soil pushing mechanism and a shielding mechanism are installed at the bottom of the drilling rig base, and a dust reduction mechanism is provided on the top of the drilling rig base.

[0009] Preferably, the driving mechanism comprises a driving screw, an internal gear ring and a mounting frame, a sliding groove is opened on the inner side of the vertical plate, and a driving screw is rotatably installed in the sliding groove, the tops of the two driving screws are fixedly connected with a driving gear 1, the inner gear ring is rotatably installed in the vertical plate, and the inner gear ring is meshed with the driving gear 1, a stepper motor 4 is installed on the top of one of the vertical plates, and the output shaft of the stepper motor 4 is fixedly connected to the top of one of the driving screws, the mounting frame is located between the two vertical plates and is fixedly connected with moving blocks on both sides, and the moving block is slidably installed in the sliding groove, and the moving block is threadedly sleeved on the surface of the driving screw, a connecting rod is rotatably installed in the inner cavity of the mounting frame, and the top of the connecting rod is connected to a conveying pipe through a rotating joint, a driving gear 3 is rotatably installed in the inner cavity of the mounting frame, and the driving gear 3 is fixedly sleeved on the surface of the connecting rod, a driving gear 2 is rotatably installed in the interior of the mounting frame, and the driving gear 2 is meshed with the driving gear 3, a drill rod motor is installed on the top of the mounting frame, and the output shaft of the drill rod motor is connected to the driving gear 2.

[0010] Preferably, the drill rod mechanism comprises a powder-spraying drill bit, the top end of the powder-spraying drill bit is sleeved to the bottom of the inner cavity of the connecting rod and fixed by a screw, the powder-spraying drill bit and the middle part of the connecting rod are provided with a through groove, a plurality of movable plates are slidably installed inside the powder-spraying drill bit, and the plurality of movable plates are arranged in a ring shape, an arc-shaped plate is slidably installed in the inner cavity of the movable plate, driving strips are fixedly connected to both sides of the bottom end of the arc-shaped plate, and tooth grooves are provided on the surface of the driving strip, a plurality of through holes are provided on the side of the powder-spraying drill bit, a through hole is provided on the outer side of the movable plate, and the through hole and the through hole are aligned with each other. The diameters are the same and they fit each other. A moving groove located above the through hole is opened on the outer side of the moving plate. A threaded driving column is rotatably installed in the inner cavity of the moving groove, and an elliptical column is threadedly installed on the surface of the threaded driving column. The elliptical column is slidably installed in the inner cavity of the moving groove, and one end of the elliptical column is sleeved into the inner cavity of the through hole and fits with the inner wall of the through hole. A worm wheel is fixedly connected to one end of the threaded driving column. A worm is rotatably installed inside the moving plate and located above the worm wheel, and the worm wheel is meshed with the worm wheel. Both ends of the worm wheel are fixedly connected with passive gears, and the passive gear is meshed with the tooth groove.

[0011] A protective box is installed on the outside of the top of the powder-spraying drill bit, and a driving motor 2 is installed on the top of the protective box. The top of the movable plate is fixedly connected to a top plate 1, and the top plate 1 extends to the inner cavity of the protective box. The top of the arc plate penetrates the movable plate and is fixedly connected to the top plate 2, and one end of the top plate 2 extends into the protective box. A guide rod is fixedly connected to the inside of the powder-spraying drill bit, and the guide rod penetrates the top plate 2 and the top plate 1 and is slidably connected to it. A spring is slidably installed on the guide rod, and the spring is fixedly connected to the upper surface of the top plate 1, and the top of the spring is fixedly connected to the bottom of the top plate 2. A threaded rod is rotatably installed in the inner cavity of the protective box, and the threaded rod penetrates the top plate 1 and is slidably connected to it, and the threaded rod penetrates the top plate 2 and is threadedly installed with it. A T-slot is opened on the top of the top plate 1, and a T-shaped transmission rod is slidably installed in the inner cavity of the T-slot, and the top of the T-shaped transmission rod is fixedly connected to the bottom of the top plate 2 above.

[0012] Preferably, a transmission gear ring is rotatably installed inside the protective box, the tops of the threaded rods are connected to transmission gears, and the transmission gear ring is meshed with a plurality of transmission gears, and one of the threaded rods is fixedly connected to the second output shaft of the drive motor.

[0013] Preferably, two groups of straightening mechanisms are provided with the same structure, the straightening mechanism comprising a mounting plate, the mounting plate having a mounting groove, the inner cavity of the mounting groove being slidably mounted with a straightening column, the end of the straightening column being rotatably mounted with a rolling ball, one end of the inner cavity of the mounting groove being fixedly connected with a rectangular rod, and the rectangular rod is slidably sleeved into the inner cavity of the straightening column, a bevel gear 2 is threadedly mounted on the surface of the straightening column, the bevel gear 2 is rotatably mounted inside the mounting plate, a second bevel gear ring is rotatably mounted inside the mounting plate and below the bevel gear 2, and the second bevel gear ring is meshed with the bevel gear 2, an outer gear ring is mounted on the outer side of the second bevel gear ring, a driving gear 4 is rotatably mounted inside the mounting plate, and the driving gear 4 is meshed with the outer gear ring, a servo motor is mounted at the bottom of the mounting plate, and the output shaft of the servo motor is fixedly connected to the driving gear 4, one of the mounting plates is located between the two vertical plates and has driving blocks fixedly connected at both ends, the driving block is threadedly sleeved to the surface of the driving screw, and the other mounting plate is mounted inside the base of the drilling rig.

[0014] Preferably, the soil pushing mechanism includes a transmission gear ring, which is rotatably mounted on the bottom of the drilling rig base, a rotating column is rotatably mounted on the transmission gear ring, a rotating gear is fixedly connected to the top of the rotating column, an annular fixed box is provided on the transmission gear ring, and a driving motor is mounted in the inner cavity of the annular fixed box, and the driving motor is connected to one of the rotating columns, a rotating gear ring is rotatably mounted on the transmission gear ring, the rotating gear ring is meshed with the rotating gear, a driving gear five is rotatably mounted in the inner cavity of the drilling rig base, a driving motor one is mounted inside the drilling rig base, the output shaft of the driving motor one is fixedly connected to the driving gear five, and the driving gear five is meshed with the outer side of the transmission gear ring, and an arc-shaped pushing plate is fixedly mounted on the bottom of the rotating column.

[0015] Preferably, the shielding mechanism includes a plurality of support seats, wherein the support seats are installed on the bottom edge of the drilling rig base, wherein a spring is installed inside one of the support seats, a shielding cloth is connected to the spring, metal sheets are provided on the upper and lower sides of the shielding cloth, and magnetic plates are connected to the outer sides of the support seats.

[0016] Preferably, the dust reduction mechanism comprises two semicircular boxes, which are distributed in a mirror image with the center of the drilling rig base as the center, a sliding seat is fixedly installed on the bottom of the semicircular box, a dust removal fan is installed inside the semicircular box, a grid plate is fixedly connected to the inner cavity of the semicircular box, a filter box is placed on the grid plate and located in the inner cavity of the semicircular box, a trumpet-shaped dust suction port is installed at the bottom of the semicircular box, and an air inlet pipe is installed at the top of the trumpet-shaped dust suction port, a notch corresponding to the air inlet pipe is opened on the side of the filter box, a cover plate is provided on the filter box, a plurality of semicircular air bag rings are fixedly installed on the inner side of the semicircular box, and the plurality of semicircular air bag rings are connected to each other, an air pump is provided on the semicircular box, and the output end of the air pump is connected to the air inlets of the plurality of semicircular air bag rings;

[0017] A guide groove is provided on the drilling rig base, and a driving screw is rotatably installed in the inner cavity of the guide groove, and the driving screw passes through the sliding seat and is threadedly installed with the sliding seat, and the thread directions of the two sliding seats are opposite, and the end of the driving screw is fixedly connected to a bevel gear, and a first bevel gear ring is rotatably installed inside the drilling rig base, and the first bevel gear ring is meshed with a bevel gear, and a stepper motor is installed inside the drilling rig base, and the stepper motor is connected to one of the driving screws.

[0018] Preferably, a traction rod is slidably mounted inside the mounting frame, a positioning block is fixedly connected to the top of the traction rod, the bottom of the traction rod is fixedly connected to the upper surface of one of the mounting plates, and a smooth section is provided at the bottom of the driving screw.

[0019] The present invention provides a construction device for reinforcing a roadbed in a frozen soil area by using powder injection piles, which has the following beneficial effects:

[0020] 1. The construction method and construction equipment for reinforcing the roadbed in the frozen soil area by using powder injection piles, drive one of the driving screws to rotate by a stepper motor four, and make the two sets of driving screws rotate synchronously under the action of the inner ring gear and the driving gear one, so as to push the mounting frame to move downward, and at the same time start the drill rod motor to drive the driving gear two to rotate, so as to drive the powder injection drill bit to rotate, so as to achieve downward drilling, and during the drilling process, an elliptical cylinder is used to block the inner cavity of the through hole, and the end of the elliptical cylinder is adapted to the surface of the powder injection drill bit, so as not to affect the drilling rig, and the use of the elliptical cylinder can prevent some stone particles from entering the inner cavity of the through hole to cause blockage, and avoid affecting the spraying of the powder curing agent, so as to improve the stability of the equipment.

[0021] 2. The construction method and construction equipment for reinforcing the roadbed in the frozen soil area by using the powder injection piles, drive the rotating column to rotate by the driving motor, and then drive the rotating gear to rotate, the rotating gear rotates to rotate the rotating ring gear, the rotating ring gear drives other rotating gears to rotate synchronously, and then the arc-shaped push plate is unfolded, and at the same time, the driving motor 1 is started to drive the driving gear 5 to rotate, the driving gear 5 rotates to drive the transmission ring gear to rotate, and then the inclined arc-shaped push plate is used to slowly push the soil around the borehole into the borehole, and when the driving motor 1 rotates in the opposite direction, the soil can be pushed away from the periphery of the borehole, no manual operation is required, and it is more convenient and quick.

[0022] 3. The construction method and equipment for reinforcing the roadbed in the frozen soil area by using powder spray piles, which comprises the following steps: pulling the shielding cloth out from the inner cavity of the support seat, and then wrapping the shielding cloth around the outside of several support seats, thereby surrounding the side of the bottom space of the drilling rig base, and fixing the shielding cloth by contacting the metal sheet with the magnetic plate for adsorption. The fixing is very convenient, and it can be directly pulled down when winding, thereby avoiding a large amount of powder from overflowing from the side of the bottom space of the drilling rig base to cause environmental pollution. The dust reduction mechanism can be used to inhale the airflow with a large amount of dust, and the dust enters the inner cavity of the filter box through the air inlet pipe. The solid dust is filtered out by the air inlet pipe and left in the inner cavity of the filter box. The airflow is discharged through the dust removal fan, thereby avoiding dust overflow, thereby purifying the construction environment, and avoiding pollution to the construction environment during the powder spray pile construction.

[0023] 4. The construction method and equipment for reinforcing the roadbed in the frozen soil area with cement spray piles apply the original cement spray pile technology to the water stop on both sides of the plateau frozen soil roadbed. In the original technology, longitudinal cement spray piles are set on both sides of the roadbed slope foot. The cement spray piles are used to bite and prevent the influence of water on the roadbed after the underground frozen soil outside the roadbed melts. The water stop and water isolation effect is achieved by reducing the flow of groundwater and heat exchange. At the same time, precipitation wells are set on both sides of the roadbed to reduce the moisture inside the roadbed. This technology makes the roadbed structure more stable and extends the service life of the highway. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the drilling rig base viewed from above of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the installation plate of the present invention in a top view and a cross-section;

[0027] Figure 4 For the present invention Figure 1 A schematic diagram of the structure at D in the middle is enlarged;

[0028] Figure 5 For the present invention Figure 1 A schematic diagram of the structure enlargement at the center A;

[0029] Figure 6 For the present invention Figure 1 A schematic diagram of the structure enlarged at C in the middle;

[0030] Figure 7 For the present invention Figure 1 A schematic diagram of the structure enlarged at B in the middle;

[0031] Figure 8 It is a structural schematic diagram of a partial cross-section of the movable plate of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the front side of the present invention;

[0033] Fig.10 This is a schematic diagram of the structure of the drilling rig base of the present invention when viewed from above;

[0034] Fig.11 It is an elevation view when the construction method of the present invention is implemented;

[0035] Fig.12 It is a plan view when the construction method of the present invention is implemented.

[0036] In the figure: 1. Drilling rig base; 2. Support seat; 3. Magnetic plate; 4. Metal sheet; 5. Shielding cloth; 6. Spring; 7. Tooth groove; 8. Powder spray drill bit; 9. Sliding seat; 10. Bevel gear 1; 11. First bevel gear ring; 12. Driving bar; 13. Stepping motor 1; 14. Driving screw rod; 15. Driving screw rod; 16. Vertical plate; 17. Mounting plate; 18. Drawbar; 19. Moving block; 20. Driving gear 1 ; 21. Drive gear 2; 22. Drill rod motor; 23. Delivery pipe; 24. Connecting rod; 25. Drive gear 3; 26. Stepper motor 4; 27. Inner gear ring; 28. Positioning block; 29. ​​Mounting frame; 30. Drive block; 31. Dust removal fan; 32. Grid plate; 33. Semicircular box; 34. Filter box; 35. Cover plate; 36. Air pump; 37. Passive gear; 38. Intake pipe; 39. Semicircular air pump Capsule ring; 40, trumpet-shaped suction port; 41, bevel gear 2; 42, elliptical column; 43, rolling ball; 44, straightening column; 45, second bevel gear ring; 46, outer gear ring; 47, servo motor; 48, drive gear 4; 49, rectangular rod; 50, drive gear 5; 51, drive motor 1; 52, rotating gear ring; 53, drive motor; 54, rotating gear; 55, rotating column; 56, arc-shaped push plate; 57 , transmission gear ring; 58, movable groove; 59, threaded rod; 60, T-shaped transmission rod; 61, T-shaped groove; 62, spring; 63, worm; 64, arc plate; 65, movable plate; 66, protective box; 67, top plate one; 68, top plate two; 69, transmission gear; 70, drive motor two; 71, guide rod; 72, through hole; 73, threaded drive column; 74, through hole; 75, worm wheel; 76, mounting groove. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] See also Figures 1 to 12 The present invention provides a technical solution: a construction method for reinforcing a roadbed in a frozen soil area by using powder injection piles, comprising the following steps:

[0039] Step 1: Use a cement spray pile drilling rig to longitudinally set two rows of cement spray pile water-stop curtains at the foot of the existing roadbed slope. The cement spray piles have a diameter of 50cm, a pile spacing of 40cm, and a pile length of 6m;

[0040] Step 2: To achieve water-stopping and anti-seepage of cement spray piles, 10cm is reserved for inter-pile bite control of cement spray piles;

[0041] Step 3: Set up D60 drainage wells on both sides of the roadbed to eliminate the boundary conditions caused by incomplete closure of both ends of the powder injection piles.

[0042] The original cement powder spray pile technology is applied to the water stopping on both sides of the plateau frozen soil roadbed. In addition, longitudinal cement powder spray piles are set on both sides of the roadbed slope foot. The cement powder spray piles are used to bite and prevent the influence of moisture on the roadbed after the underground frozen soil outside the roadbed melts, so as to achieve the effect of water stopping and water isolation by reducing the flow of groundwater and heat exchange. At the same time, precipitation wells are set on both sides of the roadbed to reduce the moisture inside the roadbed. This technology makes the roadbed structure more stable and extends the service life of the highway.

[0043] A construction device for reinforcing a roadbed in a frozen soil area by using powder injection piles, comprising a powder injection pile drilling rig, the powder injection pile drilling rig comprising a drilling rig base 1, vertical plates 16 are installed on both sides of the upper surface of the drilling rig base 1, a driving mechanism is provided on the vertical plates 16, a drill rod mechanism is installed on the driving mechanism, a straightening mechanism is installed inside the drilling rig base 1 and on the driving mechanism, a soil pushing mechanism and a shielding mechanism are installed at the bottom of the drilling rig base 1, and a dust reduction mechanism is provided on the top of the drilling rig base 1.

[0044] The driving mechanism includes a driving screw 15, an inner gear ring 27 and a mounting frame 29. A slide groove is provided on the inner side of the vertical plate 16, and the driving screw 15 is rotatably mounted in the slide groove. The tops of the two driving screws 15 are fixedly connected with a driving gear 20. The inner gear ring 27 is rotatably mounted inside the vertical plate 16, and the inner gear ring 27 is meshed with the driving gear 20. A stepper motor 26 is installed on the top of one of the vertical plates 16, and the output shaft of the stepper motor 26 is fixedly connected to the top of one of the driving screws 15. The mounting frame 29 is located between the two vertical plates 16 and is fixedly connected with moving blocks 19 on both sides. , and the moving block 19 is slidably installed in the slide groove, the moving block 19 is threadedly sleeved on the surface of the driving screw 15, the inner cavity of the mounting frame 29 is rotatably installed with a connecting rod 24, the top of the connecting rod 24 is connected to a conveying pipe 23 through a rotating joint, the inner cavity of the mounting frame 29 is rotatably installed with a driving gear three 25, and the driving gear three 25 is fixedly sleeved on the surface of the connecting rod 24, the inside of the mounting frame 29 is rotatably installed with a driving gear two 21, and the driving gear two 21 is meshed with the driving gear three 25, and a drill rod motor 22 is installed on the top of the mounting frame 29, and the output shaft of the drill rod motor 22 is connected to the driving gear two 21.

[0045] The drill rod mechanism includes a powder-spraying drill bit 8, the top end of which is sleeved to the bottom of the inner cavity of the connecting rod 24 and fixed by a screw. The powder-spraying drill bit 8 and the middle of the connecting rod 24 are provided with through grooves. A plurality of movable plates 65 are slidably installed inside the powder-spraying drill bit 8, and the plurality of movable plates 65 are arranged in a ring shape. An arc plate 64 is slidably installed in the inner cavity of the movable plate 65. Both sides of the bottom end of the arc plate 64 are fixedly connected with a driving bar 12. The surface of the driving bar 12 is provided with tooth grooves 7. A plurality of through holes 72 are provided on the side of the powder-spraying drill bit 8. A through hole 74 is provided on the outer side of the movable plate 65. The diameters of the through holes 74 and the through holes 72 are the same and cooperate with each other. The outer side of the movable plate 65 is provided with a movable groove 58 located above the through hole 74, and a threaded driving column 73 is rotatably installed in the inner cavity of the movable groove 58, and an elliptical column 42 is threadedly installed on the surface of the threaded driving column 73, and the elliptical column 42 is slidably installed in the inner cavity of the movable groove 58, and one end of the elliptical column 42 is sleeved into the inner cavity of the through hole 72 and fits with the inner wall of the through hole 72, and one end of the threaded driving column 73 is fixedly connected to a worm gear 75, and a worm 63 is rotatably installed inside the movable plate 65 and located above the worm gear 75, and the worm 63 is meshed with the worm gear 75, and both ends of the worm 63 are fixedly connected to a driven gear 37, and the driven gear 37 is meshed with the tooth groove 7;

[0046] A protective box 66 is installed on the outer side of the top of the powder spray drill 8, and a driving motor 2 70 is installed on the top of the protective box 66. A top plate 1 67 is fixedly connected to the top of the movable plate 65, and the top plate 1 67 extends to the inner cavity of the protective box 66. The top of the arc plate 64 passes through the movable plate 65 and is fixedly connected to the top plate 2 68. One end of the top plate 2 68 extends into the protective box 66. A guide rod 71 is fixedly connected to the inside of the powder spray drill 8, and the guide rod 71 passes through the top plate 2 68 and the top plate 1 67 and is slidably connected thereto. The guide rod 71 slides on the top plate 68. A spring 62 is installed, and the spring 62 is fixedly connected to the upper surface of the top plate 67, and the top of the spring 62 is fixedly connected to the bottom of the top plate 68. A threaded rod 59 is rotatably installed in the inner cavity of the protective box 66, and the threaded rod 59 passes through the top plate 67 and is slidably connected thereto, and the threaded rod 59 passes through the top plate 68 and is threadedly installed thereto. A T-slot 61 is opened at the top of the top plate 67, and a T-shaped transmission rod 60 is slidably installed in the inner cavity of the T-slot 61, and the top end of the T-shaped transmission rod 60 is fixedly connected to the bottom of the top plate 68 above.

[0047] By using the spring 62 to support the top plate 1 67, when the top plate 2 68 moves downward, the top plate 1 67 and the top plate 2 68 can be pushed downward together to ensure that after the top plate 1 67 moves to the bottom limit position, the elliptical cylinder 42 can smoothly enter the inner cavity of the through hole 72.

[0048] A transmission gear ring 57 is rotatably installed inside the protective box 66, and the tops of the threaded rods 59 are connected to transmission gears 69, and the transmission gear ring 57 is meshed with a plurality of transmission gears 69, and one of the threaded rods 59 is fixedly connected to the output shaft of the second drive motor 70.

[0049] When the powder-spraying drill bit 8 is spraying powder, the powder-spraying drill bit 8 is first installed with the connecting rod 24 using bolts. At this time, the connecting rod 24 is connected with the powder-spraying drill bit 8 and the inner cavity of the through hole 72. The conveying pipe 23 for conveying the powdered curing agent is connected to the connecting rod 24 through a rotary joint. The stepper motor 4 26 is started to drive one of the driving screws 15 to rotate. Under the action of the inner gear ring 27 and the driving gear 1 20, the two sets of driving screws 15 are rotated synchronously, thereby pushing the mounting frame 29 to move downward. At the same time, the drill rod motor 22 is started to drive the driving gear 2 21 to rotate, thereby driving the powder-spraying drill bit 8 to rotate, thereby realizing downward drilling. During the drilling process, the elliptical cylinder 42 is used to block the inner cavity of the through hole 72, and the end of the elliptical cylinder 42 is adapted to the surface of the powder-spraying drill bit 8, so it will not affect the drilling. The use of the elliptical cylinder 42 can prevent some stone particles from entering the inner cavity of the through hole 72 to cause blockage, thereby avoiding affecting the spraying of the powdered curing agent.

[0050] When spraying the powdered curing agent, first start the driving motor 2 70 to drive the threaded rod 59 to rotate, and then under the action of the transmission gear 69 and the transmission gear ring 57, the plurality of threaded rods 59 rotate synchronously. The rotation of the threaded rod 59 drives the top plate 2 68 threadedly mounted thereon to move upward. At this time, the top plate 2 68 drives the arc plate 64 to move upward, and the bottom of the arc plate 64 moves upward with the driving bar 12. When the driving bar 12 moves, the tooth groove 7 engages with the passive gear 37, thereby driving the passive gear 37 to rotate. The passive gear 37 drives the worm 63 to rotate, thereby causing the worm 63 to drive the worm wheel 75 to rotate, and the worm wheel 75 drives the threaded driving column 73 to rotate, thereby causing the elliptical column 42 to move toward the inner cavity of the moving groove 58, thereby slowly disengaging from the moving groove 58. The movable plate 65 is in the inner cavity of the plate 65, and the movable plate 65 will not move because the elliptical cylinder 42 is not completely received in the movable groove 58. When the top plate 2 68 moves up, it will move up with the T-shaped transmission rod 60. When the movable plate 65 is completely received in the movable groove 58, the bottom of the T-shaped transmission rod 60 contacts the top of the inner cavity of the T-shaped groove 61, and the passive gear 37 is separated from the tooth groove 7. At this time, the top plate 2 68 will move up with the T-shaped transmission rod 60 and the top plate 1 67, and then the movable plate 65 moves up, so that the through hole 74 is aligned with the through hole 72, and the powder curing agent is sprayed out through the through hole 74 and the through hole 72 by using external additional equipment, and at the same time, the powder spraying drill 8 is started to rotate and move up and down for stirring.

[0051] There are two groups of righting mechanisms with the same structure. The righting mechanisms include a mounting plate 17. A mounting groove 76 is provided inside the mounting plate 17. A righting column 44 is slidably installed in the inner cavity of the mounting groove 76. A rolling ball 43 is rotatably installed at the end of the righting column 44. A rectangular rod 49 is fixedly connected to one end of the inner cavity of the mounting groove 76. The rectangular rod 49 is slidably sleeved into the inner cavity of the righting column 44. A bevel gear 41 is threadedly installed on the surface of the righting column 44. The bevel gear 41 is rotatably installed inside the mounting plate 17. A second bevel gear ring 45 is rotatably installed inside the mounting plate 17 and below the bevel gear 41. , and the second bevel gear ring 45 is meshed with the bevel gear second 41, an outer gear ring 46 is installed on the outer side of the second bevel gear ring 45, a driving gear four 48 is rotatably installed inside the mounting plate 17, and the driving gear four 48 is meshed with the outer gear ring 46, a servo motor 47 is installed at the bottom of the mounting plate 17, and the output shaft of the servo motor 47 is fixedly connected to the driving gear four 48, one of the mounting plates 17 is located between the two vertical plates 16 and has a driving block 30 fixedly connected at both ends, the driving block 30 is threadedly sleeved to the surface of the driving screw 15, and the other mounting plate 17 is installed inside the drilling rig base 1.

[0052] The soil pushing mechanism includes a transmission gear ring 57, which is rotatably installed at the bottom of the drilling rig base 1. A rotating column 55 is rotatably installed on the transmission gear ring 57, and a rotating gear 54 is fixedly connected to the top of the rotating column 55. An annular fixed box is provided on the transmission gear ring 57, and a driving motor 53 is installed in the inner cavity of the annular fixed box, and the driving motor 53 is connected to one of the rotating columns 55. A rotating gear ring 52 is rotatably installed on the transmission gear ring 57, and the rotating gear ring 52 is meshed with the rotating gear 54. A driving gear 50 is rotatably installed in the inner cavity of the drilling rig base 1, and a driving motor 51 is installed inside the drilling rig base 1. The output shaft of the driving motor 51 is fixedly connected to the driving gear 50, and the driving gear 50 is meshed with the outer side of the transmission gear ring 57, and an arc-shaped pushing plate 56 is fixedly installed at the bottom of the rotating column 55.

[0053] After drilling with the powder-spraying drill bit 8, part of the plateau frozen soil will be pushed out. During the powder-spraying pile construction operation, part of the soil needs to be mixed with the powdered curing agent before being pushed into the borehole. The driving motor 53 is started to drive the rotating column 55 to rotate, thereby driving the rotating gear 54 to rotate. The rotating gear 54 rotates to rotate the rotating gear ring 52, and the rotating gear ring 52 drives other rotating gears 54 to rotate synchronously, thereby unfolding the arc-shaped push plate 56. At the same time, the driving motor 1 51 is started to drive the driving gear 5 50 to rotate. The driving gear 5 50 rotates to drive the transmission gear ring 57 to rotate, and then the inclined arc-shaped push plate 56 is used to slowly push the soil around the borehole into the borehole. When the driving motor 1 51 rotates in the opposite direction, the soil can be pushed away from the periphery of the borehole. No manual operation is required, which is more convenient and quick.

[0054] The shielding mechanism includes several support seats 2, which are installed on the bottom edge of the drilling rig base 1. A spring 6 is installed inside one of the support seats 2, and a shielding cloth 5 is connected to the spring 6. Metal sheets 4 are provided on the upper and lower sides of the shielding cloth 5, and magnetic plates 3 are connected to the outer sides of the support seats 2.

[0055] During the construction process, due to the large amount of dust and a large amount of dust overflowing from the bottom of the drilling rig base 1, the shielding cloth 5 is installed through the clockwork 6, and the shielding cloth 5 can be pulled out from the inner cavity of the support seat 2, and then the shielding cloth 5 is wrapped around the outside of several support seats 2, and then the side of the bottom space of the drilling rig base 1 is surrounded, and the metal sheet 4 is used to contact and adsorb the magnetic plate 3, and then the position of the shielding cloth 5 is fixed. The fixation is very convenient, and it can be directly pulled down when winding, so as to avoid a large amount of powder from overflowing from the side of the bottom space of the drilling rig base 1 to cause environmental pollution.

[0056] The dust reduction mechanism includes two semicircular boxes 33, which are mirror-imaged with the center of the drilling rig base 1 as the center. A sliding seat 9 is fixedly installed at the bottom of the semicircular box 33, a dust removal fan 31 is installed inside the semicircular box 33, a grid plate 32 is fixedly connected to the inner cavity of the semicircular box 33, a filter box 34 is placed on the grid plate 32 and located in the inner cavity of the semicircular box 33, a trumpet-shaped dust suction port 40 is installed at the bottom of the semicircular box 33, and an air inlet pipe 38 is installed at the top of the trumpet-shaped dust suction port 40, a notch corresponding to the air inlet pipe 38 is opened on the side of the filter box 34, a cover plate 35 is provided on the filter box 34, a plurality of semicircular air bag rings 39 are fixedly installed on the inner side of the semicircular box 33, and the plurality of semicircular air bag rings 39 are connected to each other, an air pump 36 is provided on the semicircular box 33, and the output end of the air pump 36 is connected to the air inlet of the plurality of semicircular air bag rings 39;

[0057] A guide groove is provided on the drilling rig base 1, and a driving screw 14 is rotatably installed in the inner cavity of the guide groove, and the driving screw 14 passes through the sliding seat 9 and is threadedly installed with the sliding seat 9, and the thread directions of the two sliding seats 9 are opposite. The end of the driving screw 14 is fixedly connected to a bevel gear 10, and a first bevel gear ring 11 is rotatably installed inside the drilling rig base 1, and the first bevel gear ring 11 is meshed with the bevel gear 10. A stepper motor 13 is installed inside the drilling rig base 1, and the stepper motor 13 is connected to one of the driving screws 14.

[0058] The driving screw 14 is installed through the guide groove, and the driving screw 14 is driven to rotate by the stepping motor 13. Under the action of the first bevel gear ring 11, the two driving screws 14 are operated synchronously, so that the two sliding seats 9 are close to each other, and then the two semicircular boxes 33 are pushed close together to form a circular ring to surround the powder-spraying drill bit 8. At this time, due to the different diameter specifications of the powder-spraying drill bit 8, the inner cavity of the semicircular airbag ring 39 can be inflated by the air pump 36. Note that when inflating, the semicircular airbag ring 39 close to the semicircular box 33 should be inflated first, so as to reduce the distance between the powder-spraying drill bit 8 and the semicircular airbag ring 39.

[0059] Starting the dust removal fan 31 will generate negative pressure in the inner cavity of the semicircular box 33, and then generate negative pressure at the trumpet-shaped dust suction port 40, so that the airflow with a large amount of dust can be sucked in, and the dust enters the inner cavity of the filter box 34 through the air intake pipe 38, and is filtered by the air intake pipe 38 to leave the solid dust in the inner cavity of the filter box 34. The airflow is discharged through the dust removal fan 31, thereby avoiding dust overflow, thereby purifying the construction environment and avoiding pollution to the construction environment during the powder spray pile construction. Then, the filter box 34 can be directly taken out, the cover 35 can be opened, and the dust collected in the filter box 34 can be recycled.

[0060] A traction rod 18 is slidably mounted inside the mounting frame 29 , a positioning block 28 is fixedly connected to the top of the traction rod 18 , the bottom of the traction rod 18 is fixedly connected to the upper surface of one of the mounting plates 17 , and a smooth section is provided at the bottom of the driving screw 15 .

[0061] The servo motor 47 is started to drive the driving gear 48. Under the action of the outer gear ring 46, the second bevel gear ring 45 rotates. The rotation of the second bevel gear ring 45 drives all the bevel gears 2 41 to rotate synchronously. The rotation of the bevel gear 2 41 drives the straightening column 44 to move forward and backward, so that the rolling ball 43 at the end of the straightening column 44 contacts the side of the drill rod, thereby achieving support, which can prevent the powder spray drill bit 8 from tilting and deviating due to the long length of the drill rod during the drilling process.

[0062] When the powder-spraying drill bit 8 is driven to move downward, the driving blocks 30 at both ends of one of the mounting plates 17 will also move downward with the instrument, thereby realizing the support and straightening of the middle part of the powder-spraying drill bit 8, and can move with the powder-spraying drill bit 8 to prevent the powder-spraying drill bit 8 from tilting during drilling. At the same time, the mounting plate 17 inside the drilling rig base 1 is used to support the bottom end of the powder-spraying drill bit 8.

[0063] When the driving block 30 moves downward to the smooth section on the driving screw 15, the driving block 30 no longer moves downward, and the traction rod 18 moves upward along the mounting frame 29. When the powder spray drill bit 8 rises, the traction rod 18 and the mounting frame 29 slide relative to each other. When the mounting frame 29 contacts the positioning block 28, the traction rod 18 moves upward, thereby pulling the mounting plate 17 below to move upward and re-threaded onto the surface of the driving screw 15.

[0064] In summary, the construction method and construction equipment for reinforcing the roadbed in the frozen soil area by using powder injection piles, when in use, firstly install the powder injection drill bit 8 with the connecting rod 24 by using bolts, at this time the connecting rod 24 is connected with the powder injection drill bit 8 and the inner cavity of the through hole 72, and the delivery pipe 23 for delivering the powdered curing agent is connected with the connecting rod 24 by a rotary joint;

[0065] The servo motor 47 is started to drive the driving gear 48, and the second bevel gear ring 45 is rotated under the action of the outer gear ring 46. The rotation of the second bevel gear ring 45 drives all the bevel gears 2 41 to rotate synchronously. The rotation of the bevel gear 2 41 drives the straightening column 44 to move forward and backward, so that the rolling ball 43 at the end of the straightening column 44 contacts the side of the drill pipe;

[0066] The stepper motor 4 26 is started to drive one of the driving screws 15 to rotate, and the two sets of driving screws 15 are rotated synchronously under the action of the inner gear ring 27 and the driving gear 1 20, thereby pushing the mounting frame 29 to move downward, and at the same time, the drill rod motor 22 is started to drive the driving gear 2 21 to rotate, thereby driving the powder-spraying drill bit 8 to rotate, thereby realizing downward drilling. During the drilling process, the elliptical cylinder 42 is used to block the inner cavity of the through hole 72;

[0067] When the powdered curing agent is sprayed, the drive motor 2 70 is started to drive the threaded rod 59 to rotate, and then the plurality of threaded rods 59 are synchronously rotated under the action of the transmission gear 69 and the transmission gear ring 57. The rotation of the threaded rod 59 drives the top plate 2 68 threadedly mounted thereon to move upward. At this time, the top plate 2 68 drives the arc plate 64 to move upward, and the bottom of the arc plate 64 moves upward with the driving bar 12. When the driving bar 12 moves, the tooth groove 7 engages with the passive gear 37, thereby driving the passive gear 37 to rotate. The passive gear 37 drives the worm 63 to rotate, thereby causing the worm 63 to drive the worm wheel 75 to rotate, and the worm wheel 75 drives the threaded driving column 73 to rotate, thereby causing the elliptical column 42 to move upward. The inner cavity of the movable groove 58 moves, and then slowly separates from the inner cavity of the movable plate 65. During the upward movement of the top plate 2 68, the T-shaped transmission rod 60 moves upward. When the movable plate 65 is completely retracted into the movable groove 58, the bottom of the T-shaped transmission rod 60 contacts the top of the inner cavity of the T-shaped groove 61, and the passive gear 37 is separated from the tooth groove 7. At this time, the top plate 2 68 moves upward with the T-shaped transmission rod 60 and the top plate 1 67, and then the movable plate 65 moves upward, so that the through hole 74 is aligned with the through hole 72, and the powder curing agent is sprayed out through the through hole 74 and the through hole 72 by using an external additional device, and at the same time, the powder spraying drill 8 is started to rotate and move up and down for stirring;

[0068] During the mixing process, the driving motor 53 is started to drive the rotating column 55 to rotate, and then the rotating gear 54 is driven to rotate. The rotating gear 54 rotates to rotate the rotating ring gear 52, and the rotating ring gear 52 drives other rotating gears 54 to rotate synchronously, thereby unfolding the arc-shaped push plate 56. At the same time, the driving motor 1 51 is started to drive the driving gear 5 50 to rotate. The driving gear 5 50 rotates to drive the transmission ring gear 57 to rotate, and then the inclined arc-shaped push plate 56 is used to slowly push the soil around the borehole into the borehole;

[0069] During the construction process, the shielding cloth 5 is pulled out from the inner cavity of the support seat 2, and then the shielding cloth 5 is wrapped around the outside of several support seats 2, thereby surrounding the side of the bottom space of the drilling rig base 1, and the metal sheet 4 is contacted with the magnetic plate 3 for adsorption, thereby fixing the position of the shielding cloth 5;

[0070] Start the stepper motor 13 to drive the screw rod 14 to rotate, so that the two sliding seats 9 are close to each other, and then push the two semicircular boxes 33 to close together to form a ring to surround the powder-spraying drill bit 8, and inflate the inner cavity of the semicircular airbag ring 39 through the air pump 36, thereby reducing the distance between the powder-spraying drill bit 8 and the semicircular airbag ring 39;

[0071] The dust removal fan 31 is started to generate negative pressure in the inner cavity of the semicircular box 33, and then negative pressure is generated at the trumpet-shaped dust suction port 40, so that the airflow with a large amount of dust can be sucked in, and the dust enters the inner cavity of the filter box 34 through the air inlet pipe 38, and the solid dust is filtered by the air inlet pipe 38 to remain in the inner cavity of the filter box 34, and the airflow is discharged through the dust removal fan 31;

[0072] After the construction is completed, the powdered curing agent in the inner cavity of the powder spray drill bit 8 is completely sprayed out by airflow, and the powder spray drill bit 8 is cleaned.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A construction method for reinforcing a roadbed in a frozen soil area using powder injection piles, characterized in that: The following steps are involved: Step 1: Use a cement spray pile drilling rig to longitudinally set two rows of cement spray pile water-stop curtains at the foot of the existing roadbed slope. The cement spray piles have a diameter of 50cm, a pile spacing of 40cm, and a pile length of 6m; Step 2: To achieve water-stopping and anti-seepage of cement spray piles, 10cm is reserved for inter-pile bite control of cement spray piles; Step 3: Set up D60 drainage wells on both sides of the roadbed to eliminate the boundary conditions caused by incomplete closure of both ends of the powder injection piles.

2. A construction device for reinforcing the roadbed in frozen soil areas by using powder injection piles, characterized in that: The invention comprises a powder injection pile drilling rig, which comprises a drilling rig base (1), both sides of the upper surface of the drilling rig base (1) are equipped with vertical plates (16), a driving mechanism is provided on the vertical plates (16), a drill rod mechanism is installed on the driving mechanism, a straightening mechanism is installed inside the drilling rig base (1) and on the driving mechanism, a soil pushing mechanism and a shielding mechanism are installed at the bottom of the drilling rig base (1), and a dust suppression mechanism is provided on the top of the drilling rig base (1).

3. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: The driving mechanism comprises a driving screw (15), an inner gear ring (27) and a mounting frame (29); a slide groove is provided on the inner side of the vertical plate (16), and a driving screw (15) is rotatably mounted in the slide groove; the tops of the two driving screws (15) are fixedly connected with a driving gear 1 (20); an inner gear ring (27) is rotatably mounted inside the vertical plate (16), and the inner gear ring (27) is meshed with the driving gear 1 (20); a stepper motor 4 (26) is mounted on the top of one of the vertical plates (16), and the output shaft of the stepper motor 4 (26) is fixedly connected to the top of one of the driving screws (15); the mounting frame (29) is located between the two vertical plates (16) and is fixedly connected with moving blocks (19) on both sides; and The moving block (19) is slidably installed in the slide groove, and the moving block (19) is threadedly sleeved on the surface of the driving screw (15). A connecting rod (24) is rotatably installed in the inner cavity of the mounting frame (29), and the top of the connecting rod (24) is connected to a conveying pipe (23) through a rotating joint. A driving gear three (25) is rotatably installed in the inner cavity of the mounting frame (29), and the driving gear three (25) is fixedly sleeved on the surface of the connecting rod (24). A driving gear two (21) is rotatably installed inside the mounting frame (29), and the driving gear two (21) is meshed with the driving gear three (25). A drill rod motor (22) is installed on the top of the mounting frame (29), and the output shaft of the drill rod motor (22) is connected to the driving gear two (21).

4. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: The drill rod mechanism comprises a powder-spraying drill bit (8), the top end of the powder-spraying drill bit (8) is sleeved to the bottom of the inner cavity of the connecting rod (24) and fixed by a screw, the middle of the powder-spraying drill bit (8) and the connecting rod (24) are provided with a through groove, a plurality of movable plates (65) are slidably installed inside the powder-spraying drill bit (8), and the plurality of movable plates (65) are arranged in a ring shape, an arc plate (64) is slidably installed in the inner cavity of the movable plate (65), both sides of the bottom end of the arc plate (64) are fixedly connected with a driving strip (12), the surface of the driving strip (12) is provided with a tooth groove (7), a plurality of through holes (72) are provided on the side of the powder-spraying drill bit (8), a through hole (74) is provided on the outer side of the movable plate (65), and the diameter of the through hole (74) is the same as that of the through hole (72) and they cooperate with each other, The outer side of the movable plate (65) is provided with a movable groove (58) located above the through hole (74); a threaded driving column (73) is rotatably installed in the inner cavity of the movable groove (58); and an elliptical column (42) is threadedly installed on the surface of the threaded driving column (73); the elliptical column (42) is slidably installed in the inner cavity of the movable groove (58); and one end of the elliptical column (42) is sleeved into the inner cavity of the through hole (72) and fits with the inner wall of the through hole (72); one end of the threaded driving column (73) is fixedly connected to a worm gear (75); a worm (63) is rotatably installed inside the movable plate (65) and located above the worm gear (75); the worm (63) is meshed with the worm gear (75); both ends of the worm (63) are fixedly connected to a driven gear (37); and the driven gear (37) is meshed with the tooth groove (7); A protective box (66) is installed on the outer side of the top of the powder-spraying drill bit (8), and a driving motor 2 (70) is installed on the top of the protective box (66). The top of the movable plate (65) is fixedly connected to a top plate 1 (67), and the top plate 1 (67) extends to the inner cavity of the protective box (66). The top of the arc plate (64) passes through the movable plate (65) and is fixedly connected to a top plate 2 (68). One end of the top plate 2 (68) extends into the protective box (66). A guide rod (71) is fixedly connected inside the powder-spraying drill bit (8), and the guide rod (71) passes through the top plate 2 (68) and the top plate 1 (67) and is slidably connected thereto. A spring (62) is slidably installed, and the spring (62) is fixedly connected to the upper surface of the top plate (67). The top of the spring (62) is fixedly connected to the bottom of the top plate (68). A threaded rod (59) is rotatably installed in the inner cavity of the protective box (66), and the threaded rod (59) passes through the top plate (67) and is slidably connected thereto. The threaded rod (59) passes through the top plate (68) and is threadedly installed thereto. A T-shaped groove (61) is opened at the top of the top plate (67). A T-shaped transmission rod (60) is slidably installed in the inner cavity of the T-shaped groove (61). The top end of the T-shaped transmission rod (60) is fixedly connected to the bottom of the top plate (68) above.

5. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 4, characterized in that: A transmission gear ring (57) is rotatably mounted inside the protection box (66), and the tops of the threaded rods (59) are connected to transmission gears (69), and the transmission gear ring (57) is meshed with a plurality of transmission gears (69), and one of the threaded rods (59) is fixedly connected to the output shaft of the second drive motor (70).

6. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: The straightening mechanism is provided with two groups and has the same structure. The straightening mechanism comprises a mounting plate (17). A mounting groove (76) is provided inside the mounting plate (17). A straightening column (44) is slidably mounted in the inner cavity of the mounting groove (76). A rolling ball (43) is rotatably mounted at the end of the straightening column (44). A rectangular rod (49) is fixedly connected to one end of the inner cavity of the mounting groove (76). The rectangular rod (49) is slidably sleeved into the inner cavity of the straightening column (44). A second bevel gear (41) is threadedly mounted on the surface of the straightening column (44). The second bevel gear (41) is rotatably mounted inside the mounting plate (17). A second bevel gear ring (45) is rotatably mounted inside the mounting plate (17) and below the second bevel gear (41). ), and the second bevel gear ring (45) is meshed with the bevel gear second (41), an outer gear ring (46) is installed on the outer side of the second bevel gear ring (45), a driving gear fourth (48) is rotatably installed inside the mounting plate (17), and the driving gear fourth (48) is meshed with the outer gear ring (46), a servo motor (47) is installed at the bottom of the mounting plate (17), and the output shaft of the servo motor (47) is fixedly connected to the driving gear fourth (48), one of the mounting plates (17) is located between the two vertical plates (16) and has a driving block (30) fixedly connected at both ends, the driving block (30) is threadedly sleeved onto the surface of the driving screw (15), and the other mounting plate (17) is installed inside the drilling rig base (1).

7. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: The soil pushing mechanism comprises a transmission gear ring (57), the transmission gear ring (57) is rotatably mounted on the bottom of the drilling rig base (1), a rotating column (55) is rotatably mounted on the transmission gear ring (57), a rotating gear (54) is fixedly connected to the top of the rotating column (55), an annular fixed box is arranged on the transmission gear ring (57), and a driving motor (53) is installed in the inner cavity of the annular fixed box, and the driving motor (53) is connected to one of the rotating columns (55), and the transmission gear ring (57) is provided with a rotating column (55). ) is rotatably mounted on a rotating ring gear (52), the rotating ring gear (52) is meshed with a rotating gear (54), a driving gear five (50) is rotatably mounted in the inner cavity of the drilling rig base (1), a driving motor one (51) is mounted inside the drilling rig base (1), the output shaft of the driving motor one (51) is fixedly connected to the driving gear five (50), and the driving gear five (50) is meshed with the outer side of the transmission ring gear (57), and an arc-shaped pushing plate (56) is fixedly mounted on the bottom of the rotating column (55).

8. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: The shielding mechanism comprises a plurality of support seats (2), wherein the support seats (2) are mounted on the bottom edge of a drilling rig base (1), a spring (6) is mounted inside one of the support seats (2), a shielding cloth (5) is connected to the spring (6), metal sheets (4) are provided on the upper and lower sides of the shielding cloth (5), and a magnetic plate (3) is connected to the outer side of each support seat (2).

9. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: The dust reduction mechanism comprises two semicircular boxes (33), the two semicircular boxes (33) are distributed in a mirror image with the center of the drilling rig base (1) as the center, a sliding seat (9) is fixedly installed at the bottom of the semicircular box (33), a dust removal fan (31) is installed inside the semicircular box (33), a grid plate (32) is fixedly connected to the inner cavity of the semicircular box (33), a filter box (34) is placed on the grid plate (32) and located in the inner cavity of the semicircular box (33), and a trumpet-shaped dust suction port ( 40), and an air inlet pipe (38) is installed at the top of the trumpet-shaped dust suction port (40), a notch corresponding to the air inlet pipe (38) is opened on the side of the filter box (34), a cover plate (35) is provided on the filter box (34), a plurality of semicircular air bag rings (39) are fixedly installed on the inner side of the semicircular box (33), and the plurality of semicircular air bag rings (39) are connected to each other, an air pump (36) is provided on the semicircular box (33), and the output end of the air pump (36) is connected to the air inlet of the plurality of semicircular air bag rings (39); The drilling rig base (1) is provided with a guide groove, and a driving screw (14) is rotatably installed in the inner cavity of the guide groove, and the driving screw (14) passes through the sliding seat (9) and is threadedly installed with the sliding seat (9), and the threads of the two sliding seats (9) are in opposite directions. The end of the driving screw (14) is fixedly connected to a bevel gear (10), and a first bevel gear ring (11) is rotatably installed inside the drilling rig base (1), and the first bevel gear ring (11) is meshed with the bevel gear (10). A stepping motor (13) is installed inside the drilling rig base (1), and the stepping motor (13) is connected to one of the driving screws (14).

10. The construction equipment for reinforcing the roadbed in frozen soil area by using powder injection piles according to claim 1, characterized in that: A traction rod (18) is slidably mounted inside the mounting frame (29), a positioning block (28) is fixedly connected to the top of the traction rod (18), the bottom of the traction rod (18) is fixedly connected to the upper surface of one of the mounting plates (17), and a smooth section is provided at the bottom of the driving screw (15).

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