CN112127361A - Precast tubular pile implanting equipment and pile implanting construction method - Google Patents
Precast tubular pile implanting equipment and pile implanting construction method Download PDFInfo
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- CN112127361A CN112127361A CN202011073390.7A CN202011073390A CN112127361A CN 112127361 A CN112127361 A CN 112127361A CN 202011073390 A CN202011073390 A CN 202011073390A CN 112127361 A CN112127361 A CN 112127361A
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 238000005553 drilling Methods 0.000 claims abstract description 147
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 239000002689 soil Substances 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000002513 implantation Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
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- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a precast tubular pile implanting device and a pile implanting construction method, wherein the device comprises a drilling machine main body and a drilling tool assembly, wherein a drilling mast is fixed on the drilling machine main body, an upper power head for driving the drilling tool assembly to rotate and drill is arranged on the drilling mast in a sliding manner, and a lower power head for driving a precast pile to sink is arranged on the drilling mast in a sliding manner; the upper power head is provided with a first vertical channel through which the drilling tool assembly can pass, and the upper power head is provided with a first holding mechanism for holding or loosening the drilling tool assembly; and a second vertical channel through which the precast pile and the drilling tool assembly can pass is formed in the lower power head, and a second holding mechanism for holding or loosening the precast pile is arranged on the lower power head. The drilling tool assembly can penetrate through the upper power head, so that the drilling tool assembly can be lifted to a placing space between the drilling tool assembly and the foundation through the lifting equipment to form a precast pile placing space, and the precast pile can be conveniently positioned. Therefore, when the multi-section precast pile at the same pile position or the precast piles at different pile positions are positioned, the drilling tool assembly does not need to be disassembled and assembled, and the construction efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of pile foundation construction, in particular to equipment and a method for implanting a 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 chinese invention patent CN 102561946B is a precast tubular pile implanting device and a pile implanting construction method applied by the applicant in the earlier stage. 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. The spiral drill rod assembly sequentially penetrates through the vibration exciter and the soil discharging device from bottom to top and is connected with the power head in an installing mode. In practical application, in consideration of installation stability, the height of the upright column cannot be too high, so that by adopting the assembly method that the precast tubular pile is positioned firstly, the auger stem assembly is connected with the power head, and then the auger stem assembly is inserted into the precast tubular pile, the lengths of the precast tubular pile and the auger stem assembly cannot be too long, otherwise, the auger stem assembly cannot be inserted into the precast tubular pile due to the interference problem. For the condition that the precast tubular pile and/or the auger stem assembly is too long, the assembly can only be carried out in the way of the embodiment in the patent, namely: inserting the auger stem into the precast tubular pile, positioning the precast tubular pile by using hoisting equipment, and inserting the auger stem into the power head. The precast tubular pile inserted into the auger stem is positioned, so that the practical operation is difficult, and the potential safety hazard is large (the specific operation mode is referred to paragraph [ 0033 ] in the patent specification). In addition, after the first pile is formed, the length of the lengthened auger assembly is longer, and when the next pile is formed, referring to paragraph [ 0034 ] in the patent specification, the auger assembly needs to be disassembled and then moved to the next pile position, otherwise the auger assembly interferes with the positioning of the precast pile at the next pile position. In a single working cycle, the auxiliary operation time for connecting and disconnecting the drill rod accounts for over 70 percent, the construction efficiency is low, the labor intensity of auxiliary operation personnel is high, and the popularization and the application of the precast pile implantation method are influenced.
Therefore, the auxiliary operation time of disassembling and connecting the drill rod is saved as much as possible, the construction efficiency and the operation safety are improved, and the method has important significance for popularization and application of the precast pile implantation method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the precast tubular pile implanting equipment which is convenient and fast to assemble and improves the construction efficiency, and also aims to correspondingly provide a construction method for performing the follow-up tubular pile while drilling by using the precast tubular pile implanting equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a precast tubular pile implanting device comprises a drilling machine main body and a drilling tool assembly, wherein a drilling mast is fixed on the drilling machine main body, and an upper power head for driving the drilling tool assembly to rotate and drill and a lower power head for driving a precast pile to sink are arranged on the drilling mast in a sliding manner; the upper power head is provided with a first vertical channel through which the drilling tool assembly can pass, and a first holding mechanism for holding or releasing the drilling tool assembly is arranged on the upper power head;
and a second vertical channel for the precast pile and the drilling tool assembly to pass through is formed in the lower power head, and a second holding mechanism for holding or loosening the precast pile is arranged on the lower power head.
The drilling tool assembly can penetrate through the upper power head, so that the drilling tool assembly can be lifted to a positioning space between the drilling tool assembly and the foundation through the lifting equipment to form the precast pile, and the precast pile can be conveniently positioned. Therefore, when the multi-section precast pile at the same pile position or the precast piles at different pile positions are positioned, the drilling tool assembly does not need to be disassembled and assembled, and the construction efficiency is greatly improved. And moreover, the precast tubular pile inserted into the spiral drill rod is not required to be positioned by adopting hoisting equipment, and the operability and the safety are greatly improved.
In addition, the upper power head and the lower power head are arranged on the drill mast in a sliding mode independently, and after the precast pile is hoisted and positioned, the lower power head can be moved downwards in advance to compress the precast pile, so that a spiral drill rod can penetrate into the precast tubular pile conveniently.
As a further improvement of the above technical solution:
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 drilling tool assembly comprises an auger stem and a drill bit arranged at the lower end of the auger stem; 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.
As a general inventive concept, the present invention also provides a pile implantation construction method using the above precast tubular pile implantation apparatus, comprising the steps of:
s1: positioning the precast pile;
s2: the lower power head slides downwards to be sleeved on the precast pile, and the second holding mechanism holds the precast pile tightly;
s3: the drilling tool assembly moves downwards to penetrate through the precast pile and then abuts against the foundation, and the first enclasping mechanism enclaves the drilling tool assembly;
s4: the upper power head drives the drilling tool assembly to drill; the precast pile sinks by means of self weight or the lower power head drives the precast pile to sink;
s5: after the precast pile sinks to the proper position, the second holding mechanism loosens the precast pile, the lower power head moves upwards, and the upper power head drives the drilling tool assembly to move upwards.
Compared with the construction method of CN 102561946B, because the drilling tool assembly can pass through the upper power head and the precast pile from top to bottom in sequence through the hoisting equipment, the interference problem is not needed to be considered, and for the construction of the precast pile with smaller height or the pile position of a single section of precast pile, the height of the upright post can be greatly shortened, thereby improving the safety and stability of the construction.
In step S5, after the upper power head drives the drilling tool assembly to move upward, the method further includes the following steps:
s5.1: the upper power head drives the drilling tool assembly to move upwards to expose the drilling tool assembly, the drilling tool assembly is lengthened, the first clamping mechanism loosens the drilling tool assembly, and the drilling tool assembly is lifted to form a placing space for a next section of precast pile between the drilling tool assembly and the foundation;
s5.2: after positioning the next section of precast pile, fixedly connecting the next section of precast pile with the sunk precast pile; and repeating the steps S2-S5 to sink the next precast pile section in place.
Specifically, for the pile position of the multi-section precast pile needing to sink, the drilling tool assembly can be lifted by adopting lifting equipment until the joint parts of the upper section and the lower section of the drilling tool assembly are exposed, the lower section is fixed with the sunk precast pile, the middle section installation space is reserved between the upper section and the lower section by continuing to lift the upper section, and two ends of the middle section are detachably and fixedly connected with the upper section and the lower section respectively, so that the extension of the drilling tool assembly is completed. And continuously lifting the drilling tool assembly to the assembly space reserved for the next section of precast pile, and continuously performing sinking construction on the next section of precast pile after the sunk precast pile is fixedly connected with the next section of precast pile.
Because the drilling tool assembly can be lifted to the space for reserving the drill rod lengthening and the precast pile lengthening, the drilling tool assembly lengthening and the precast pile lengthening can be completed on line, and compared with the precast pile after the drilling tool assembly and the precast pile are assembled under the line of CN 102561946B and are repositioned and assembled, the construction efficiency and the construction safety are greatly improved.
After the step S5.2, the method also comprises the following steps:
s5.3: and repeating S5.1-S5.2 until the construction of the precast pile at the pile position is completed.
Further comprising the steps of:
s6: moving the equipment to the next pile position, loosening the drilling tool assembly by the first holding mechanism, and lifting the drilling tool assembly to form a positioning space of the precast pile between the drilling tool assembly and the foundation; repeating steps S1-S5; to complete the construction of the next precast pile;
s7: and repeating the step S6 until the implantation of all the precast piles is completed.
Because the drilling tool assembly can be lifted to the positioning space for reserving the precast pile at the next pile position, the drill rod does not need to be disassembled and assembled when the pile position is converted, and compared with CN 102561946B, the time for converting the pile position is greatly shortened, so that the construction efficiency is greatly improved.
In step S3, a hoisting device is used to lift the drilling assembly or lower the drilling assembly.
Compared with the prior art, the invention has the advantages that:
the precast tubular pile implanting equipment and the pile implanting construction method can greatly save the auxiliary operation time of disassembling, connecting a drill rod and the like, greatly improve the construction efficiency of the following tubular pile while drilling and reduce the labor intensity of auxiliary operation personnel.
Drawings
Fig. 1 is a schematic structural view of a precast tubular pile implanting apparatus according to an embodiment of the present invention.
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.
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. and (6) prefabricating the pile.
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 apparatus of the present embodiment includes a drilling machine main body 1 and a drilling tool assembly 2, a drilling mast 3 is fixed on the drilling machine main body 1, a guide rail 31 arranged in parallel with the drilling mast 3 is provided on the drilling mast 3, an upper power head 4 for driving the drilling tool assembly 2 to drill rotationally and a lower power head 5 for driving the precast tubular pile to sink are slidably provided on the guide rail 31.
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 a pile supporting device 9 is fixed at the middle lower part of the drilling mast 3 through a bolt.
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.
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.
The off-line semi-automatic welding device (with swing arc function) is separated from the drilling machine main body 1 and is used for welding two sections of piles together in advance before the precast pile is implanted.
The precast tubular pile implanting equipment of this embodiment accomplishes a work progress that the precast pile was implanted as follows:
(1) after the pile position is determined, a long precast pile which is a single pile or two precast piles welded into a whole is hung on the pile position below the lower power head 5 by a special lifting appliance, and the precast pile is held by a pile holder 9;
(2) the lower power head 5 moves downwards to press on the pile head of the precast pile to clamp the pile head of the precast pile to move up and down to adjust the verticality of the pile body;
(3) the upper power head 4 moves downwards to the upper part of the lower power head 5, and rubber buffer is arranged between the upper power head and the lower power head;
(4) the hoisting long spiral drilling tool assembly 2 is inserted into a hollow clamping hole of the upper power head 4 and a middle hole of the precast pile, the top driving cylindrical part of the long spiral drilling tool assembly 2 is clamped by the upper power head 4, and the pile lifter 9 is loosened;
(5) the upper power head 4 drives the long spiral drilling tool assembly 2 to drill;
(6) the precast pile is assisted to sink into the foundation by the dead weight and a hydraulic vibrator 53 on the lower power head 5;
(7) after the precast pile is sunk in place, the lower power head 5 releases the precast pile to start lifting, meanwhile, the upper power head 4 drives the long spiral drilling rig assembly 2 to reversely lift to expose the connecting position of the driving section 212 with the gas distribution and grouting device and the drill rod section 211, the two drill rods are separated, the upper power head 4 drives the driving section 212 with the gas distribution and grouting device to lift, and the lower power head 5 continues to lift;
(8) hoisting another section of the drill rod section 211 by using a crane, connecting the two sections of the drill rod sections 211 and connecting the upper ends of the two sections of the drill rod sections 211 with a driving section 212 with a gas distribution and grouting device;
(9) the upper power head 4 loosens the long spiral drilling tool assembly 2, lifts the long spiral drilling tool assembly to a certain height by using a crane, then hangs in another precast pile and is supported by a pile supporting device 9, the lower power head 5 moves downwards and presses on the newly hung precast pile head to clamp the precast pile head to move upwards and downwards to adjust pile alignment, and the pile alignment is welded with the implanted precast pile by adopting an online semi-automatic welding device 10;
(10) the upper power head 4 clamps the top of the long spiral drilling tool assembly 2, the long spiral drilling tool assembly is lowered to the bottom, and the pile supporting device 9 is loosened;
(11) repeating the steps (5) and (6), blowing slag by air injection, and grouting to form a pile;
(12) moving the equipment to the next pile position;
(13) after the second pile position is determined, the crane lifts the long spiral drilling tool assembly 2, the lower power head 5 moves upwards, a pile feeding space is reserved, the precast pile is lifted to the pile position, the pile supporting device 9 clamps the pile stably, and the steps (2), (10), (5), (6), (9), (10) and (11) are repeated.
The precast pile implanting equipment of the embodiment completes another construction process of precast pile implantation as follows:
(1) after the pile position is determined, a long precast pile with a plurality of precast piles welded into a whole is hoisted to the pile position below the lower power head 5 by a special hoisting tool, and the precast pile is held by a pile holding device 9;
(2) the lower power head 5 moves downwards to press on the pile head of the precast pile to clamp the pile head of the precast pile to move up and down to adjust the verticality of the pile body;
(3) the upper power head 4 moves downwards to the upper part of the lower power head 5, and rubber buffer is arranged between the upper power head and the lower power head;
(4) lifting and inserting the long spiral drilling tool assembly 2 which is welded with a plurality of drill rods into a hollow clamping hole of an upper power head 4 and a middle hole of the precast pile, clamping the top driving cylindrical part of the long spiral drilling tool assembly 2 by using the upper power head 4, and loosening a pile lifter 9;
(5) the upper power head 4 drives the long spiral drilling tool assembly 2 to drill;
(6) the precast pile is assisted to sink into the foundation by the dead weight and a hydraulic vibrator 53 on the lower power head 5;
(7) after the precast pile is sunk in place, the lower power head 5 releases the precast pile and starts to lift up, and meanwhile, the upper power head 4 drives the long spiral drilling tool assembly 2 to reversely lift up;
(8) moving the equipment to the next pile position; the crane lifts the long spiral drilling tool assembly 2 to reserve a pile feeding space;
(9) and (4) repeating the steps (1) to (7).
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 (10)
1. The precast tubular pile implanting equipment comprises a drilling machine main body (1) and a drilling tool assembly (2), wherein a drilling mast (3) is fixed on the drilling machine main body (1), an upper power head (4) for driving the drilling tool assembly (2) to drill in a rotating manner and a lower power head (5) for driving a precast pile to sink are arranged on the drilling mast (3) in a sliding manner; the device is characterized in that a first vertical channel (41) through which a drilling tool assembly (2) can pass is formed in the upper power head (4), and a first holding mechanism (6) for holding or releasing the drilling tool assembly (2) is arranged on the upper power head (4);
and a second vertical channel (51) which can be used for the precast pile to stretch into and the drilling tool assembly (2) to pass through is arranged on 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).
2. The precast tubular pile implanting apparatus according to claim 1, wherein the upper power head (4) includes an upper power head box (44) and a rotary driving mechanism (45) fixed to the upper power head box (44), and the first clasping mechanism (6) includes 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).
3. The precast tubular pile implanting device according to claim 1, 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).
4. The precast tubular pile implanting device according to claim 3, 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).
5. The precast tubular pile implanting apparatus according to claim 1, wherein the drill assembly (2) includes an auger stem (21) and a drill bit (22) mounted to a lower end of the auger stem (21); the device is characterized in that a soil discharging device (8) used 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).
6. The precast tubular pile implanting apparatus according to any one of claims 1 to 5, wherein a pile holder (9) for preventing the precast pile (11) from tilting is provided on the drill mast (3), and a passage through which the precast pile (11) can pass is provided on the pile holder (9); the pile supporting device (9) is arranged below the lower power head (5).
7. A pile-planting construction method using the precast tubular pile implanting apparatus according to any one of claims 1 to 6, comprising the steps of:
s1: positioning the precast pile;
s2: the lower power head (5) slides downwards until the lower power head is sleeved on the precast pile, and the second holding mechanism (7) holds the precast pile tightly;
s3: the drilling tool assembly (2) moves downwards to penetrate through the precast pile and then abuts against the foundation, and the first enclasping mechanism (6) enclaves the drilling tool assembly (2);
s4: the upper power head (4) drives the drilling tool assembly (2) to drill; the precast pile is driven to sink by the dead weight or the lower power head (5);
s5: after the precast pile sinks to the proper position, the second holding mechanism (7) loosens the precast pile, the lower power head (5) moves upwards, and the upper power head (4) drives the drilling tool assembly (2) to move upwards.
8. The pile-planting construction method according to claim 6, wherein in the step S5, after the upper power head (4) drives the drill assembly (2) to move up, the method further comprises the following steps:
s5.1: the upper power head (4) drives the drilling tool assembly (2) to move upwards to expose the drilling tool assembly (2), the drilling tool assembly (2) is lengthened, the first holding mechanism (6) loosens the drilling tool assembly (2), and the drilling tool assembly (2) is lifted upwards to form a placing space for a next section of precast pile between the drilling tool assembly (2) and the foundation;
s5.2: after positioning the next section of precast pile, fixedly connecting the next section of precast pile with the sunk precast pile; and repeating the steps S2-S5 to sink the next precast pile section in place.
9. The pile-planting construction method according to claim 8, further comprising the following steps after the step S5.2:
s5.3: and repeating S5.1-S5.2 until the construction of the precast pile at the pile position is completed.
10. The pile-planting construction method according to any one of claims 7 to 9, further comprising the steps of:
s6: moving the equipment to the next pile position, loosening the drilling tool assembly (2) by the first holding mechanism (6), and lifting the drilling tool assembly (2) until a positioning space of the precast pile is formed between the drilling tool assembly (2) and the foundation; repeating steps S1-S5; to complete the construction of the next precast pile;
s7: and repeating the step S6 until the implantation of all the precast piles is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011073390.7A CN112127361A (en) | 2020-10-09 | 2020-10-09 | Precast tubular pile implanting equipment and pile implanting construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011073390.7A CN112127361A (en) | 2020-10-09 | 2020-10-09 | Precast tubular pile implanting equipment and pile implanting construction method |
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| CN112127361A true CN112127361A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011073390.7A Pending CN112127361A (en) | 2020-10-09 | 2020-10-09 | Precast tubular pile implanting equipment and pile implanting construction method |
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| CN (1) | CN112127361A (en) |
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Application publication date: 20201225 |