CN213476867U

CN213476867U - Device is implanted to precast tubular pile

Info

Publication number: CN213476867U
Application number: CN202022233150.0U
Authority: CN
Inventors: 何清华; 朱建新; 吴晓明; 刘泽军
Original assignee: Sunward Intelligent Equipment Co Ltd
Current assignee: Sunward Intelligent Equipment Co Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-06-18
Anticipated expiration: 2030-10-09

Abstract

The utility model discloses a precast tubular pile implanting device, which comprises a drilling tool assembly, a drilling machine main body with a drilling mast, and a power head component arranged on the drilling mast in a sliding way, wherein the power head component comprises an upper power head and a lower power head, a first vertical channel for the drilling tool assembly to pass through is arranged on the upper power head, and a first holding mechanism for holding or loosening a drilling rod is arranged on the upper power head; the lower power head is provided with a second vertical channel for the precast pile to extend into and the drilling tool assembly to pass through, and the lower power head is provided with a second holding mechanism for holding or loosening the precast pile; the top of the drill mast is connected with a crane for hoisting the drilling tool assembly, and the crane can horizontally rotate relative to the drill mast. The drill rod can pass through the upper power head, the lower power head and the precast pile after being lifted by the crane to be lengthened, and two drill rods to be lengthened in the lengthening process can be ensured to be coaxially arranged all the time through the limiting support of the power heads, so that the lengthening construction is convenient, efficient and high in safety.

Description

Device is implanted to precast tubular pile

Technical Field

The utility model relates to a pile foundation construction technical field especially relates to a device is implanted to precast tubular pile.

Background

The pipe following while drilling method is a middle digging pile sinking method. During construction, the long spiral drill rod connected with the drill bit with the hole expanding function penetrates through the precast tubular pile, and the bottom end of the precast tubular pile is excavated to form a hole. When drilling is needed, the power head rotates forwards, the reaming wing plate of the reaming drill bit is opened, the drill bit rotates to dig soil at a distance below the bottom end of the precast tubular pile, drilling residues are conveyed by the blade of the auger bit to be discharged through the hole of the tubular pile, and the precast tubular pile sinks along with the drill bit by the dead weight during drilling. If the precast tubular pile is not smooth when being blocked in the pile sinking process, a vibration exciter can be started to vibrate and press the precast tubular pile to break through (the vibration exciter is arranged at the upper end of the power head by the existing clamping vibration power head, so that the stroke of the vibration exciter on a guide rail is limited). After the pile is connected by the drill and the pile is connected to the calibrated depth, the power head reversely rotates to withdraw the reaming wing plate for removing the slag, concrete is poured at the pile bottom, the vibration exciter is started to press the prefabricated pipe pile to be seated in the hole bottom, the drill rod is drawn out, and the drilling machine moves. And then, performing high-pressure grouting treatment on the outer side of the precast tubular pile by grouting equipment to form a pile.

The patent CN 102561946B of the chinese utility model is a precast tubular pile implanting device and a construction method of following a tubular pile while drilling, which are applied by the applicant earlier. Referring to the attached figure 6 of the patent specification, the power head, the dumping device and the vibration exciter are fixedly connected to form a linkage mechanism, then the linkage mechanism is connected with the main winch, and the linkage mechanism is pulled by the main winch to slide up and down along the upright post. In practical application, firstly, the auger stem is sleeved into the precast pile, the precast pile sleeved with the auger stem is hoisted to a pile measuring station by adopting hoisting equipment, and the linkage mechanism is moved downwards, so that the auger stem sequentially passes through the vibration exciter and the soil discharging device and then is installed and connected with the power head. For the condition that the precast tubular pile and/or the auger stem need to be lengthened, the next auger stem is inserted into the next precast tubular pile, the crane hoists the precast tubular pile sleeved with the auger stem, the lower end of the precast tubular pile is aligned with the top end of the sunk pile, a proper space is reserved, the auger stem is lowered by the auxiliary hook to be connected with the previous auger stem, the lock pin is inserted, the precast tubular pile is lowered by the main hook to be connected with the previous precast tubular pile after being butted, and finally, the linkage mechanism is moved down to insert the auger stem into the power head (the concrete operation mode is referred to the paragraph [ 0030 ] - [ 0034 ] in the patent specification). Practice shows that the collision between the auger stem and the precast pile is serious in the positioning process, the extension auger stem and the precast pile need to be linked with a main hook and an auxiliary hook of a crane, the auger stem and the precast pile shake seriously in the actual operation process, the extension operation is very difficult, and the potential safety hazard is large.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a device is implanted to convenient, the high-efficient and high precast tubular pile of construction.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a precast tubular pile implanting device comprises a drilling tool assembly, a drilling machine main body with a drilling mast and a power head assembly connected to one side of the drilling mast, wherein the drilling tool assembly comprises a spiral drill rod and a drill bit arranged at the lower end of the spiral drill rod, the power head assembly comprises an upper power head used for driving the drilling tool assembly to drill in a rotating manner and a lower power head used for driving a precast pile to sink, and the upper power head and the lower power head are both arranged on the drilling mast in a sliding manner;

the upper power head is provided with a first vertical channel through which a drilling tool assembly can pass, and a first holding mechanism for holding or loosening a drilling rod is arranged on the upper power head;

the lower power head is provided with a second vertical channel for the precast pile to extend into and the drilling tool assembly to pass through, and the lower power head is provided with a second holding mechanism for holding or loosening the precast pile;

the top of the drill mast is connected with a crane for hoisting the drilling tool assembly, and the crane can horizontally rotate relative to the drill mast.

The drilling tool assembly can penetrate through the upper power head, so that the spiral drill rod to be lengthened can be lifted from the storage station by the crane at the top of the drill mast, then is rotated to the pile planting station, is lowered to penetrate through the upper power head, the lower power head and the precast pile to be planted, and then is assembled with the drilling tool assembly extending out of the pile to form the lengthened drilling tool assembly. The spiral drill rod to be lengthened is supported in a limiting mode through the upper power head and the lower power head, and two spiral drill rods to be lengthened in the lengthening process can be arranged coaxially all the time, so that the lengthening construction is convenient, efficient and high in safety.

As a further improvement of the above technical solution:

in order to facilitate the storage and taking of the drill rods, one side of the drill mast is connected with a storage mechanism for storing the drilling tool assembly and the spare spiral drill rod, and the storage mechanism and the power head component are respectively arranged on different sides of the drill mast. The crane can efficiently finish the access of spiral rotation through rotary motion.

For improving the operation security of drilling tool assembly extension in-process, precast tubular pile implants the device and still including being used for interim support in implanting the precast pile and waiting to implant the supporting seat between the precast pile, set up the hand hole of the drilling tool assembly extension construction of being convenient for on the supporting seat. The precast pile is to be implanted through the supporting seat support, so that the safety accident caused by shaking of the precast pile can be avoided.

The crane comprises a rack, a fixed arm, a telescopic arm and a winch; the frame is connected with the drill mast through a slewing bearing, the fixed arm is hinged with the frame, one end of the telescopic arm is slidably arranged in the fixed arm, and the other end of the telescopic arm is provided with a pulley; the hoist is arranged on the fixed arm, a lifting rope is wound on the hoist, and a rope outlet end of the lifting rope penetrates through the pulley and then is connected with a lifting hook.

And a variable-amplitude oil cylinder is hinged between the fixed arm and the rack.

The upper power head comprises an upper power head box and a rotary driving mechanism fixed on the upper power head box, and the first clamping mechanism comprises a gear, a clamping piece, a telescopic oil cylinder, a top plate, a lower slewing bearing and an upper slewing bearing; the gear is in transmission connection with the rotary driving mechanism, the lower end of the gear is connected with the upper power head box through the lower slewing bearing, the top plate is arranged above the upper power head box, the telescopic oil cylinder is vertically arranged and fixed between the upper power head box and the top plate, and the upper end of the holding piece is connected with the top plate through the upper slewing bearing; the gear has the inner chamber that can supply the drilling tool assembly to pass, can drive during the flexible hydro-cylinder shrink and hold the piece and stretch into in the inner chamber and joint between drilling tool assembly and gear, flexible hydro-cylinder extension can drive holding the piece and follow stretch out and remove the connection of drilling tool assembly and gear in the inner chamber.

From this, first mechanism of clasping links firmly the back with drilling tool assembly and gear through the holding member, and rotary driving mechanism can drive first mechanism of clasping and drilling tool assembly and rotate together to accomplish drilling construction.

The holding piece comprises a plurality of wedge-shaped jaws, the inner cavity is of an inverted frustum-shaped structure, the outer wall of each wedge-shaped jaw is matched with the inner wall of the inner cavity, and the inner wall of each wedge-shaped jaw is matched with the outer wall of the drilling tool assembly.

The wedge-shaped jaw is connected with the upper slewing bearing through a connecting rod.

And the outer ring of the upper slewing bearing is connected with the connecting rod through a slewing disc.

The lower power head comprises a lower power head box and a vibrator arranged on the outer side wall of the lower power head box, the vibrator is used for driving the precast pile to sink, and the part of the vibrator extends into the lower power head box; the second holding mechanism comprises a plurality of clamps arranged in the lower power head box, and the plurality of clamps are annularly arranged around the precast pile at intervals; the anchor clamps are including being fixed in the driving piece on the power head box inside wall down to and the compact heap that links to each other with the driving piece, the driving piece is used for driving the compact heap to the precast pile applys inward radial pressure or drive the compact heap is kept away from the precast pile.

Through the layout optimization of the vibrator and the clamp, the interference of the vibrator on the vertical reciprocating movement of the drilling tool assembly is eliminated.

In order to facilitate the power head to compress the precast pile, the upper part of the second vertical channel is provided with a stopping step for preventing the precast pile from penetrating out, and the stopping step is arranged above the second clasping mechanism.

The device comprises a lower power head, a spiral drill rod blade, a lower power head, a third vertical through hole and a third vertical through hole, wherein the upper end of the lower power head is provided with a soil discharging device used for removing soil between the spiral drill rod blades, and the third vertical through hole is formed in the soil discharging device and can be used for the precast pile and the drilling tool assembly to pass through.

The upper end of the drilling tool assembly is provided with a stop piece for preventing the drilling tool assembly from falling from the first vertical channel.

The drilling mast is provided with a pile supporting device for preventing the precast pile from inclining, and the pile supporting device is provided with a channel for the precast pile to pass through; the pile lifter is arranged below the lower power head.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a device is implanted to precast tubular pile can improve the efficiency and the security that drilling rod and precast pile lengthen the construction greatly in the work progress.

Drawings

Fig. 1 is the structure diagram of the precast tubular pile implanting device of the embodiment of the utility model.

Fig. 2 is a schematic view of the upper power head.

Fig. 3 is a schematic top view of the upper power head.

FIG. 4 is a schematic cross-sectional view of the upper power head

Fig. 5 is a front view of the lower power head.

Fig. 6 is a schematic top view of the lower power head.

Fig. 7 is a schematic view of the construction of the drilling assembly.

Fig. 8 is a schematic view of the structure of the drill.

Fig. 9 is a front view of the supporting base.

Fig. 10 is a sectional view a-a of fig. 9.

Fig. 11 is a schematic structural view of the crane.

Illustration of the drawings: 1. a drill body; 2. a drilling tool assembly; 21. a auger stem; 211. a drill pipe section; 212. a drive section; 22. a drill bit; 23. a stopper; 24. a down-the-hole impactor; 25. reaming wing plates; 3. drilling a mast; 31. a guide rail; 4. installing a power head; 41. a first vertical channel; 42. an upper holding claw; 43. a pulley block; 44. an upper power head box; 45. a rotation driving mechanism; 451. a drive motor; 452. a drive gear; 5. a lower power head; 51. a second vertical channel; 52. a lower power head box; 53. a vibrator; 6. a first clasping mechanism; 61. a gear; 62. a wedge jaw; 63. a telescopic oil cylinder; 64. a top plate; 65. a lower slewing bearing; 66. an upper slewing bearing; 67. a connecting rod; 68. a rotary disk; 7. a second clasping mechanism; 71. a drive member; 72. a compression block; 8. a soil discharging device; 81. a third vertical through hole; 82. a lower holding claw; 9. pile supporting devices; 10. an online semi-automatic welding device; 11. prefabricating a pile; 12. hoisting a machine; 121. a frame; 122. a fixed arm; 123. a telescopic arm; 124. a winch; 125. a slewing bearing; 126. a pulley; 127. a lifting rope; 128. a hook; 129. a variable amplitude oil cylinder; 13. a storage mechanism; 14. a supporting seat; 141. and (4) hand hole.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example 1:

as shown in fig. 1, the precast tubular pile implanting device of the present embodiment includes a support base 14, a drill assembly 2, a drill body 1 having a drill mast 3, a crane 12 disposed at the top end of the drill mast 3, a power head assembly connected to one side of the drill mast 3, a pile holder 9, and a storage mechanism 13, wherein the power head assembly and the pile holder 9 are disposed on the same side of the drill mast 3, and the storage mechanism 13 and the power head assembly are disposed on different sides of the drill mast 3.

The drilling machine main body 1 is a crawler pile frame type walking device, the drilling mast 3 is connected with the front end of the drilling machine main body 1 through a pin shaft and a support rod, and the pile supporting device 9 is fixed at the middle lower part of the drilling mast 3 through a bolt.

The storage mechanism 13 is used for storing the drilling tool assembly 2 and the spare auger stem. The storage mechanism 13 is provided with two clamping grooves for clamping the spiral drill rod, and the two clamping grooves of the two storage mechanisms 13 are arranged oppositely. As shown in fig. 9 and 10, the supporting seat 14 is used for temporarily supporting between the pre-cast pile and the pre-cast pile to be implanted, and the supporting seat 14 is provided with a hand hole 141 for facilitating the extension construction of the drilling assembly 2.

The power head assembly comprises an upper power head 4 for driving the drilling tool assembly 2 to drill in a rotating mode and a lower power head 5 for driving the precast pile to sink, and the upper power head 4 and the lower power head 5 are arranged on the drilling mast 3 in a sliding mode.

As shown in fig. 2 and 3, the upper power head 4 is provided with a first vertical channel 41 through which the drilling tool assembly 2 can pass, and the upper power head 4 is provided with a first clasping mechanism 6 for clasping or loosening the drilling tool assembly 2.

The hollow screw drilling power head (i.e. the upper power head 4) can be clamped on the drill mast guide rail 31 to slide up and down through the upper clamping claw 42.

The hollow spiral drilling power head (upper power head 4) clamps the top of the long spiral drills with different sizes through a clamping bar jaw (first clamping mechanism 6) with replaceable specifications to drive the cylindrical part to drill, and the clamping bar jaw can also clamp any spiral blade of the drill rod. The hollow spiral drilling power head (upper power head 4) is provided with an upper pulley or a lower pulley 43, the upper pulley or the lower pulley is connected with a lifting winch on the drilling machine main body 1 through a steel wire rope, and the lower pulley or the lower pulley is connected with a pressing winch on the crawler pile frame through the steel wire rope, so that the hollow spiral drilling power head (upper power head 4) can slide up and down on a drill mast guide rail under the action of the lifting winch.

As shown in fig. 4, the upper power head 4 includes an upper power head box 44 and a rotary driving mechanism 45 fixed on the upper power head box 44, the rotary driving mechanism 45 includes a driving motor 451 fixed on the top of the upper power head box 44, and a driving gear 452 in transmission connection with the driving motor 451, and the driving gear 452 extends into the upper power head box 44.

With continued reference to fig. 4, the first clasping mechanism 6 includes a gear 61, clasping members, a telescopic cylinder 63, a top plate 64, a lower slewing bearing 65 and an upper slewing bearing 66.

Gear 61 is located in upper powerhead casing 44 and engages drive gear 452. The lower end of the gear 61 is fixedly connected with the inner ring of the lower slewing bearing 65, and the outer ring of the lower slewing bearing 65 is fixedly connected with the upper power head box 44.

The top plate 64 is provided above the upper power head case 44, and the telescopic cylinder 63 is vertically arranged and fixed between the upper power head case 44 and the top plate 64.

The gear 61 has an inner cavity for the drilling assembly 2 to pass through, and the holding member comprises a plurality of wedge-shaped jaws 62, the inner cavity is of an inverted truncated cone structure, the outer wall of the wedge-shaped jaws 62 is matched with the inner wall of the inner cavity, and the inner wall of the wedge-shaped jaws 62 is matched with the outer wall of the drilling assembly 2. The wedge jaw 62 is hinged at its upper end to a link 67, and the links 67 are hinged at their upper ends to a swivel plate 68. The rotary disk 68 is fixedly connected with the outer ring of the upper rotary support 66, and the upper rotary support 66 is fixedly connected with the top plate.

Therefore, when the telescopic oil cylinder 63 contracts, the wedge-shaped jaw 62 can be driven to extend into the inner cavity and be clamped between the drilling tool assembly 2 and the gear 61, and when the telescopic oil cylinder 63 extends, the wedge-shaped jaw 62 can be driven to extend out of the inner cavity and the connection between the drilling tool assembly 2 and the gear 61 is released.

Wherein the inner ring of the lower slewing bearing 65, the outer ring of the upper slewing bearing 66, the gear 61, the wedge jaw 62, the connecting rod 67 and the slewing disc 68 participate in the slewing.

Therefore, after the first clasping mechanism 6 fixedly connects the drilling tool assembly 2 with the gear 61 through the clasping member, the rotary driving mechanism 45 can drive the member participating in rotation to rotate together with the drilling tool assembly 2, so as to complete the drilling construction.

As shown in fig. 5 and 6, the lower power head 5 is provided with a second vertical channel 51 through which the precast pile and the drilling tool assembly 2 can pass, and the lower power head 5 is provided with a second clasping mechanism 7 for clasping or loosening the precast pile.

The lower power head 5 comprises a lower power head box 52 and a vibrator 53 arranged on the outer side wall of the lower power head box 52, wherein the vibrator 53 is used for driving the precast pile to sink, and the vibrator 53 partially extends into the lower power head box 52.

The upper end of the lower power head 5 is provided with a soil discharging device 8 for removing soil between blades of the auger stem 21, and the soil discharging device 8 is provided with a third vertical through hole 81 through which the precast pile and the drilling tool assembly 2 can pass.

The second clasping mechanism 7 comprises a plurality of clamps arranged in the lower power head box 52, and the plurality of clamps are annularly arranged around the precast pile at intervals; the fixture comprises a driving piece 71 fixed on the inner side wall of the lower power head box 52 and a pressing block 72 connected with the driving piece 71, wherein the wall surface of the pressing block 72 facing the precast pile is an arc surface matched with the outer wall of the precast pile. The drive 71 is used to drive the hold-down block 72 to apply inward radial pressure to the precast pile or to drive the hold-down block 72 away from the precast pile.

In addition, the upper part of the second vertical channel 51 is provided with a stopping step for preventing the precast pile from penetrating out, and the stopping step is arranged above the second clasping mechanism 7. When the lower power head 5 presses down the precast pile, the top of the precast pile is abutted to the stopping step.

The clamping vibration power head (namely the lower power head 5) is positioned below the hollow spiral drilling power head (the upper power head 4). Eccentric or reciprocating vibrators 53 are symmetrically arranged on two sides of the clamping vibration power head (lower power head 5) and used for pile sinking. A counter bore (a second vertical channel 51) which is slightly larger than the diameter of the pile is arranged in the clamping vibration power head (a lower power head 5), and clamps which are symmetrically arranged along the circumferential direction of the precast pile are arranged in the counter bore and are used for clamping the pile. And a soil discharging device 8 is arranged above the clamping vibration power head (the lower power head 5) and is used for removing soil between the blades of the spiral drill rod and discharging the soil along a certain direction. The soil discharging device 8 is connected with the clamping vibration power head (the lower power head 5) through a spring or other buffer devices. The soil discharging device 8 can be clamped on the drill mast guide rail 31 to slide through the lower clamping claw 82. The two sides of the soil discharging device 8 are provided with hanging points which are connected with a winch on a crawler pile frame through a steel wire rope, so that the soil discharging device 8 and the clamping vibration power head (lower power head 5) can slide up and down on the drill mast guide rail 31 under the action of the winch. The clamping vibration power head (lower power head 5) can be sleeved on the pile head of the precast pile, and the second holding mechanism 7 is used for clamping the precast pile to move up and down together, or can be sleeved on the pile feeder head, and the second holding mechanism 7 is used for clamping the pile feeder to press the precast pile into the ground surface.

As shown in fig. 7 and 8, the drill assembly 2 includes an auger shaft 21 and a drill bit 22 mounted to a lower end of the auger shaft 21.

The auger stem 21 is mainly formed by connecting one or more auger stem sections 211 and a driving section 212 with a gas distribution and grouting device. At the top of the drive section 212 is a stop 23, the stop 23 being used to ensure that the drill does not fall out of the bore of the hollow auger drilling head (upper head 4).

Referring to fig. 8, a down-the-hole impactor 24 is centrally mounted on the drill bit 22. When the drill bit 22 is rotated forward, the reaming wings 25 at the bottom of the drill bit 24 are opened to drill a hole having a diameter larger than the outer diameter of the drill rod. When the bit 22 is reverse drilled, the reaming wings 25 are retracted to ensure that the bit can be withdrawn from the inner bore of the pile.

An online semi-automatic welding device 10 is arranged at the front part of the body of the drilling machine main body 1 or at the lower end of the drilling mast 3. When pile extension is needed in the precast pile implantation process, the two sections of piles are welded together.

With continued reference to fig. 1, a crane 12 is mounted on top of the drill mast 3 by a slewing bearing 125, the crane 12 being adapted to lift the drill assembly 2, the crane 12 being horizontally pivotable relative to the drill mast 3.

As shown in fig. 11, the crane 12 includes a frame 121, a fixed arm 122, a telescopic arm 123, a winch 124, and a luffing cylinder 129; the frame 121 is connected to the drill mast 3 via a pivoting support 125, and the pivoting support 125 is drivingly connected to a drive motor fixed to the top end of the drill mast 3. The fixed arm 122 is hinged with the frame 121, one end of the telescopic arm 123 is slidably arranged in the fixed arm 122, and the other end of the telescopic arm 123 is provided with a pulley 126; the winding machine 124 is arranged on the fixed arm 122, a lifting rope 127 is wound on the winding machine 124, and a rope outlet end of the lifting rope 127 passes through the pulley 126 and then is connected with a lifting hook 128. The amplitude variation oil cylinder 129 is hinged between the fixed arm 122 and the frame 121.

The utility model discloses a device basic structure is implanted to precast tubular pile:

1. a walking working platform: the pile frame is designed on the basis of a pile frame of a certain type;

2. hollow spiral drilling power head (upper power head): can move up and down on the drill mast guide rails. The basic mechanism is similar to the rotary part of a small-sized full-rotary drilling machine. The power head can clamp the top of the long spiral drill to drive the cylindrical part to transmit drilling torque, and can also clamp the outer side of any spiral blade to drive drilling. The movable part of the power head clamping jaw can be increased to adapt to long spiral drills with different sizes;

3. clamping vibrating power head (lower power head): the eccentric hydraulic vibrators are symmetrically arranged on two sides and are positioned below the hollow auger power head and also move on a drill mast guide rail, and the exciting force of each vibrator is about 35 tons. The power head can be placed on the pile head of the precast pile and can clamp the precast pile to move up and down together, or clamp the pile feeder to press the precast pile below the ground surface, and the soil discharge guide device is arranged on the lower power head;

4. the special crane comprises: a special crane similar to a guide rail of a mountain river self-propelled full-slewing drilling machine is arranged at the top of the drilling mast and can rotate and horizontally stretch (a lifting hook can be positioned at a drilling rotation center);

5. drilling tool strorage device: the drill mast is provided with auxiliary devices at two sides for placing a plurality of groups of long spiral drill components, wherein one position is provided with a drilling tool driving section.

6. Long auger assembly: comprises a drill bit, a detachable long spiral drill rod and a driving shaft with an air distribution and grouting device. The drill bit can be divided into a common bucket tooth spiral drill bit, a cutting tooth short spiral drill bit, a short spiral drill bit with a down-the-hole impactor arranged in the center, an auger bit with a hole bottom expansion head function and the like according to geological conditions. The spiral blade of the detachable long spiral drill rod is made of a thick steel plate, the inner circle and the outer circle of the circular ring after blanking are machined as far as possible before forming, forming is accurate, a cylinder with high precision is formed on the outer side of the spiral blade on the whole, the drill rod does not have large deflection when the power head clamps any position of the outer side of the long spiral drill rod, and drilling can be driven. The upper part of the driving shaft is provided with a step to ensure that the drilling tool cannot fall off from the hollow hole of the upper power head;

7. pile feeding rod: the outer diameter of the pile feeding rod is equal to the outer diameter of the precast pile, and the inner diameter of the pile feeding rod is larger than the middle aperture of the precast pile.

8. Supporting seat: the height of the supporting seat and the peripheral window need to be convenient for the disassembly and the assembly of the spiral drill rod connecting pin.

The precast tubular pile implanting device of this embodiment accomplishes the work progress that the precast pile was implanted as follows:

s1: hoisting the precast pile to the pile position below the lower power head by using a special hoisting tool, and supporting the precast pile by using a pile supporting device 9;

s2: after the lower power head 5 slides downwards to be sleeved on the precast pile, the second holding mechanism 7 clamps the pile head of the precast pile and moves up and down to adjust the verticality of the pile body;

s3: the upper power head 4 moves downwards to a lifting space formed between the upper power head 4 and the crane 12, the crane 12 lifts the drilling tool assembly 2 from the storage mechanism 13 to a pile planting station, and the drilling tool assembly 2 is put down to pass through the first vertical channel 41, the second vertical channel 51 and the precast pile in sequence and then abut against the foundation;

s4: the first clasping mechanism 6 clasps the drilling tool assembly 2, and the upper power head 4 drives the drilling tool assembly 2 to drill; the precast pile is sunk by self weight or the lower power head 5 drives the precast pile to sink to the place;

s5.1: the connection between the driving section 212 and the drill rod section 211 is released, the upper power head 4 drives the driving section 212 to move upwards, and the lower power head 5 moves upwards after the precast pile is loosened by the second clasping mechanism 7 until a placing space of the next section of precast pile is formed between the lower power head 5 and the implanted precast pile;

s5.2: the crane 12 is connected to the drive section 212, the first clasping mechanism 6 releases the drive section 212, and the crane 12 suspends the drive section 212 into the storage mechanism 13 by a swing motion.

S6: the supporting crane is used for hoisting the next precast pile, and the distance from the lower end of the supporting crane to the upper end of the first precast pile is larger than the height of the supporting seat. In order to ensure safety, a supporting seat 14 is placed on the upper end face of the sunk precast pile, and the lower power head 5 moves downwards to the lower end face of the second precast pile to be abutted against the upper end face of the supporting seat 14, so that the height of the supporting seat 14, namely the distance between the next section of precast pile and the sunk precast pile, forms an extension construction space of the drilling tool assembly 2;

s7: the crane 12 lifts the next auger stem 21 with the driving section in the storage mechanism 13 to the pile planting station through rotary motion, the crane 12 lowers the next auger stem 21 so that the next auger stem 21 sequentially passes through the first vertical channel 41, the second vertical channel 51 and the next precast pile and then extends into the lengthening construction space in the step S5, and the next auger stem 21 is detachably and fixedly connected with the auger stem 21 in the sunk precast pile in the lengthening construction space to form the lengthened drilling tool assembly 2;

s8: and slightly lifting the second precast pile by using the lower power head 5, taking the supporting seat 14 away, and descending the lower power head 5 until the end surfaces of the two precast piles are contacted, and then completing the butt joint operation (welding or other connection) of the precast piles. Repeating steps S2-S4, namely: the upper power head drives the drill rod, and the lower power head vibrates to sink the precast pile into the foundation until the lower power head descends to the limit position, so that the implantation of the next section of precast pile is completed.

And repeating the steps S5-S8 until the construction of the precast pile at the pile position is completed.

If the last precast pile can reach the preset depth, the pile feeding or pile breaking operation → the pile feeding operation is carried out: and determining whether to connect the auger stem again according to actual conditions, and then connecting the pile feeding rod by adopting a mode of adding precast piles, and then carrying the precast piles to the proper positions in the foundation by the combined work of the upper power head and the lower power head. Pile breaking operation: and (4) withdrawing all the long spiral drills after grouting the hole bottom according to the next step, removing the equipment to perform pile breaking operation → performing air injection and slag blowing operation after the precast pile reaches the preset depth, and allowing compressed air to enter the hole bottom through the top device of the driving shaft and the long spiral drills. And blowing out the sediment at the bottom of the hole in the process of keeping the drill rod rotating, then performing grouting pile-forming operation, injecting cement slurry into the bottom of the hole, the pile bottom, the pile side and the pile middle hole through a grouting device at the top of the driving shaft and the long spiral drill middle hole, keeping the spiral drill rotating → the long spiral drill in the grouting process, sequentially lifting the prefabricated pile hole and placing the prefabricated pile hole into a drill storage position beside the drill mast → the next pile position.

The drilling tool assembly does not need to be completely hung out in the subsequent pile planting process, the drilling tool assembly is clamped in the upper power head in a state of being as long as possible on the premise of ensuring the stability, and a crane or a local machine is specially designed to match the lifting of a drill rod in a hoisting mode. During the drilling process, the pressure air is continuously input for the smooth discharge of the dregs, and a proper amount of common water can be added into the seriously dried foundation.

The basic length of the precast pile of the same set of equipment is unified as much as possible, the length of the long spiral drill which is matched with the equipment and is connected and disconnected every time is larger than the basic length of the precast pile during working (a plurality of standard sections can be combined in advance), and the connecting pin is ensured to be exposed outside the precast pile when the drill rod is connected and disconnected.

Effect improvement countermeasures of pile position dense construction projects: the construction efficiency of the complete device can be greatly improved by pre-drilling a pile planting hole with a proper depth by a small-tonnage rotary drilling rig and then inserting a precast pile in advance in a construction site with better foundation conditions and more dense pile positions.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. A precast tubular pile implanting device comprises a drilling tool assembly (2), a drilling machine main body (1) with a drilling mast (3) and a power head assembly connected to one side of the drilling mast (3), wherein the drilling tool assembly (2) comprises an auger stem (21) and a drill bit (22) installed at the lower end of the auger stem (21), the power head assembly comprises an upper power head (4) used for driving the drilling tool assembly (2) to drill in a rotating manner and a lower power head (5) used for driving a precast pile to sink, and the upper power head (4) and the lower power head (5) are both arranged on the drilling mast (3) in a sliding manner; it is characterized in that the preparation method is characterized in that,

a first vertical channel (41) through which the drilling tool assembly (2) can pass is formed in the upper power head (4), and a first holding mechanism (6) for holding or loosening a drill rod is arranged on the upper power head (4);

a second vertical channel (51) for the precast pile to extend into and for the drilling tool assembly (2) to pass through is formed in the lower power head (5), and a second holding mechanism (7) for holding or loosening the precast pile (11) is arranged on the lower power head (5);

the top of the drilling mast (3) is connected with a crane (12) for hoisting the drilling tool assembly (2), and the crane (12) can horizontally rotate relative to the drilling mast (3).

2. The precast tubular pile implanting device according to claim 1, wherein a storage mechanism (13) for storing the drill tool assembly (2) and the spare drill rod is connected to one side of the drill mast (3), and the storage mechanism (13) and the power head assembly are separately provided on different sides of the drill mast (3).

3. The precast tubular pile implanting device according to claim 1, further comprising a supporting base (14) for temporarily supporting between the precast pile and the precast pile to be implanted, wherein the supporting base (14) is provided with a hand hole (141) for facilitating the extension construction of the drilling tool assembly (2).

4. The precast tubular pile implanting device according to claim 1, wherein the crane (12) comprises a frame (121), a fixed arm (122), a telescopic arm (123) and a hoist (124); the frame (121) is connected with the drill mast (3) through a rotary support (125), the fixed arm (122) is hinged with the frame (121), one end of the telescopic arm (123) is slidably arranged in the fixed arm (122), and the other end of the telescopic arm (123) is provided with a pulley (126); the winch (124) is arranged on the fixed arm (122), a lifting rope (127) is wound on the winch (124), and a rope outlet end of the lifting rope (127) penetrates through the pulley (126) and then is connected with a lifting hook (128).

5. The precast tubular pile implanting device according to claim 4, wherein a luffing cylinder (129) is hinged between the fixing arm (122) and the frame (121).

6. The precast tubular pile implanting device according to any one of claims 1 to 5, wherein the upper power head (4) comprises an upper power head box (44) and a rotary driving mechanism (45) fixed on the upper power head box (44), and the first clasping mechanism (6) comprises a gear (61), a clasping member, a telescopic cylinder (63), a top plate (64), a lower slewing bearing (65) and an upper slewing bearing (66); the gear (61) is in transmission connection with the rotary driving mechanism (45), the lower end of the gear (61) is connected with the upper power head box (44) through a lower rotary support (65), the top plate (64) is arranged above the upper power head box (44), the telescopic oil cylinder (63) is vertically arranged and fixed between the upper power head box (44) and the top plate (64), and the upper end of the holding piece is connected with the top plate (64) through an upper rotary support (66); gear (61) have the inner chamber that can supply drilling tool assembly (2) to pass, can drive during flexible hydro-cylinder (63) shrink and hold the piece and stretch into in the inner chamber and joint between drilling tool assembly (2) and gear (61), flexible hydro-cylinder (63) are extended the time and can be driven the holding member and follow stretch out in the inner chamber and remove the connection of drilling tool assembly (2) and gear (61).

7. The precast tubular pile implanting device according to any one of claims 1 to 5, wherein the lower power head (5) comprises a lower power head box (52), and a vibrator (53) arranged on the outer side wall of the lower power head box (52), the vibrator (53) is used for driving the precast pile (11) to sink, and the vibrator (53) partially extends into the lower power head box (52); the second clasping mechanism (7) comprises a plurality of clamps arranged in the lower power head box (52), and the plurality of clamps are annularly arranged around the precast pile (11) at intervals; the clamp comprises a driving piece (71) fixed on the inner side wall of the lower power head box (52) and a pressing block (72) connected with the driving piece (71), wherein the driving piece (71) is used for driving the pressing block (72) to apply inward radial pressure to the precast pile (11) or driving the pressing block (72) to be far away from the precast pile (11).

8. The precast tubular pile implanting device according to claim 7, wherein a stopping step (54) for preventing the precast pile (11) from penetrating out is arranged at the upper part of the second vertical channel (51), and the stopping step (54) is arranged above the second clasping mechanism (7).

9. The precast tubular pile implanting device according to any one of claims 1 to 5, wherein a soil discharging device (8) for removing soil between blades of the auger stem (21) is installed at the upper end of the lower power head (5), and a third vertical through hole (81) through which the precast pile and the drilling tool assembly (2) can pass is formed in the soil discharging device (8).

10. The precast tubular pile implanting device according to any one of claims 1 to 5, wherein a pile holder (9) for preventing the precast pile (11) from inclining is provided on the drill mast (3), and a passage for the precast pile (11) to pass through is provided on the pile holder (9); the pile supporting device (9) is arranged below the lower power head (5).