CN115059071A - Pile sinking construction method for precast pile - Google Patents
Pile sinking construction method for precast pile Download PDFInfo
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- CN115059071A CN115059071A CN202210669427.5A CN202210669427A CN115059071A CN 115059071 A CN115059071 A CN 115059071A CN 202210669427 A CN202210669427 A CN 202210669427A CN 115059071 A CN115059071 A CN 115059071A
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 19
- 230000003139 buffering effect Effects 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention relates to a pile foundation construction technology, in particular to a precast pile sinking construction method, which comprises a base, a rack and a pile planting device, wherein the base is positioned at the front side and the rear side of the rack, the base is a slide rail, a slide groove is arranged on the slide rail, a first slide motor is arranged at the two sides of the rack, the first slide motor is connected with the slide groove in a sliding way, and a first hydraulic press is arranged at the front side and the rear side of the rack respectively. Further improving the construction efficiency.
Description
Technical Field
The invention relates to a pile foundation construction technology, in particular to a precast pile sinking construction method.
Background
The existing precast pile planting process has two sets of large-scale construction equipment, one frame suspension drilling machine set pile forming machine system is used for drilling, expanding bottom and grouting, one equipment is used for planting piles, two popular construction processes aiming at the equipment are on the market, and the construction process comprises the following steps:
the first process comprises the following steps: the main mast of the frame suspension drilling machine is relatively low, the main mast suspends 1 drilling machine device, the drilling machine is adopted for drilling, and when the drilling depth is larger than the length of a drill rod, the drill rod needs to be spliced and disassembled. Because the main mast is low, the depth of drilling at every time is limited, when the drilling depth is deep, the times of splicing and dismantling the drill rod are multiple, the splicing and dismantling process is complicated at every time, the construction efficiency is low, after drilling, bottom expanding and grouting are completed, a pile machine system needs to be removed, pile hoisting equipment moves to the position near a pile hole, 2 or more prefabricated piles spliced into a pile are hoisted to plant the pile, after the pile is implanted, the pile needs to be temporarily fixed, the hoisting equipment is removed, the pile planting system moves to the position near the pile hole again, the pile feeding operation is carried out by adopting the drilling equipment, the pile is fed to the position of the elevation of the pile top under the ground, and pile planting is completed.
According to the operation mode, the drill rods are complex to splice and dismantle, the pile machine system is in a stagnation state in the pile planting process of the hoisting equipment, the construction efficiency of the pile machine system is not fully exerted, the equipment utilization rate is low, and the construction efficiency is low.
And a second process: the main mast of the frame suspension drilling machine is higher, the main mast suspends 2 drilling machine devices, a drill rod can be installed in advance on each drilling machine device, the pre-spliced drill rod is longer due to the fact that the main mast is higher, and the total length of the drill rods suspended by the 2 drilling machines can meet the requirement of drilling depth. The time for splicing and removing the drill rod during drilling is greatly reduced. After the pile driver system finishes drilling, the pile driver system needs to be removed, and the pile planting equipment is moved to the position near the pile hole to plant the single-section pile.
The two processes are that drilling and pile planting are separated, two sets of large-scale equipment are adopted for respectively drilling and pile planting, the number of required equipment is large, the occupied area is large, and the construction efficiency is low.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a precast pile sinking construction method.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the invention relates to a method for preparing a high-performance composite material.
Furthermore, the improved structure of the invention is that the base comprises a rectangular base and a corner base, one end of the base is provided with a splicing strip, the other end of the base is provided with a splicing groove, two ends of the bottom of the base are provided with splicing plates, and splicing holes are formed in the splicing plates.
Furthermore, the hydraulic pile sinking system is improved in the invention, and comprises a first support, a hydraulic driving hammer and a buffer pile, wherein the first support is provided with a main slide rail and an auxiliary slide rail, the auxiliary slide rails are positioned on two sides of the main slide rail, the buffer pile is connected with the main slide rail and the auxiliary slide rail through a lead screw, the top of the buffer pile is provided with a driving seat, the bottom of the buffer pile is provided with a connecting ring, the connecting ring is provided with a connecting bolt, the hydraulic driving hammer is arranged on the tops of the main slide rail and the auxiliary slide rail, and the hydraulic driving hammer is provided with a second sliding motor connected with the main slide rail.
Further, the drilling system is improved to include a second support, a first telescopic device, a second telescopic device and a drilling device, wherein the first telescopic device includes a second hydraulic motor, a second hydraulic telescopic rod is arranged on the second hydraulic motor, a mounting frame is arranged at the end of the second hydraulic telescopic rod, the second telescopic device includes a third hydraulic motor, a third hydraulic telescopic rod is arranged on the second hydraulic motor, the third hydraulic motor is fixed on the mounting frame, the drilling device is arranged at the end of the third hydraulic telescopic rod, the drilling device includes a motor box, a first driving motor and a drill bit, the first driving motor is arranged in the motor box, and the output end of the first driving motor is connected with the drill bit.
Furthermore, the invention is improved in that the lifting system comprises a winch frame, a winch and at least two second driving motors, input shafts on two sides of the winch are mounted on the winch frame, an output end of each second driving motor is connected with an input end shaft of the winch, a stranded wire is wound on the winch, a bolt ring is arranged at the end part of the stranded wire, and the lifting system is provided with the at least two winch frames.
Furthermore, the invention is improved in that the sliding groove comprises a main sliding groove and an auxiliary sliding groove, the auxiliary sliding groove is arranged on two sides of the main sliding groove, the first hydraulic rod is connected with the main sliding groove through a sliding seat, the rack is connected with the auxiliary sliding groove through a sliding rod, and a fixing ring is arranged at the bottom of the first support.
Furthermore, the invention is improved in that a pulley is arranged on the sliding rod, and lubricating oil is coated on the sliding seat and the pulley.
Further, the invention is improved by comprising the following steps:
firstly, construction preparation mainly comprises entering inspection, process test, site preparation and measurement lofting, wherein before the pipe pile construction, a site is leveled and properly hardened, temporary drainage is made, measurement lofting is carried out according to a designed pile position, the allowable deviation of the pile position is 50mm, and a steel chisel and lime mark are used;
secondly, the pile driver is in place, the base and the rack are in place without errors, and the stability and the verticality of the base and the rack are checked;
prefabricating pile sinking holes, and drilling pile sinking pore passages at the pile positions by using a drilling system;
fourthly, the hanging pile is in place and corrected in verticality, the hanging pile is bound and lifted to a pile sinking system by using a lifting system, a connecting ring of a buffer pile is connected with the hanging pile, the pile body is inserted into the prefabricated pile sinking hole and is corrected for multiple times to be qualified, pile sinking is started, the pile body, the pile head and the hydraulic striking hammer are required to be coincident in axis, and the allowable deviation of the verticality is 1%;
hammering the sunk pile, hammering with a lower drop distance at the beginning, hammering according to the specified drop distance after the hung pile is stably embedded into the soil for a certain depth, and observing whether the hydraulic driving hammer, the pile head and the pile body are kept on the same axis at any time by using a measuring instrument when the pile is sunk;
step six, pile splicing, namely stopping pile sinking when a lower section of pile sinks to a position 0.5-1.0 m away from the ground to the pile top, hanging an upper section of pile for alignment, wherein the allowable deviation of the alignment of the upper section of pile and the lower section of pile plane is 10mm, cleaning the alignment ends of the upper section of pile and the lower section of pile, welding the upper section of pile and the lower section of pile after the alignment ends of the upper section of pile and the lower section of pile are cleaned, naturally cooling the welded pile to natural temperature, installing a hoop after the welding is detected to be qualified, and then brushing an anticorrosive coating on a welding area;
step seven, pile sinking is continued after pile splicing is finished, and hammering can be stopped when the pouring depth meets the design requirement;
and step eight, moving the machine, driving the rack to slide on the base by utilizing a sliding motor matched with the sliding seat, and enabling the base to slide for a long distance through a spliced rectangular base or a corner base to assist the rack to slide or assist the rack to turn.
(III) advantageous effects
Compared with the prior art, the invention provides a precast pile sinking construction method which has the following beneficial effects:
according to the invention, the drilling system is arranged to form the precast pile hole in advance at the pile sinking position, so that pile sinking can be completed quickly and stably by the hanging pile, and pile breakage caused by easy burst or deviation of sinking angle when the pile is driven and sunk is avoided, and pile sinking efficiency is improved.
Drawings
FIG. 1 is a schematic view of a half-section structure of the present invention;
FIG. 2 is a schematic view of a lifting structure according to the present invention;
FIG. 3 is a schematic view of a base structure according to the present invention;
in the figure: 1. a base; 2. a frame; 3. an equipment table; 4. a pile planting platform; 5. a first bracket; 6. a second bracket; 7. a fixed mount; 8. a control box; 9. rotating the motor; 10. a first hydraulic motor; 11. a first slide motor; 12. a lifting system; 13. a second hydraulic motor; 14. a second hydraulic telescopic rod; 15. a mounting frame; 16. a third hydraulic motor; 17. a Disney hydraulic telescopic rod; 18. a motor case; 19. a first drive motor; 20. an auxiliary chute; 21. a drill bit; 22. a hydraulic striking hammer; 23. a buffer rod; 24. a connecting ring; 25. a striking seat; 26. a fixing ring; 27. a capstan frame; 28. a winch; 29. a second drive motor; 30. a rectangular base; 31. a corner base; 32. a main chute;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention is illustrated.
The precast pile sinking method comprises the steps of leveling a field before pipe pile construction, properly hardening, performing temporary drainage, performing measurement and lofting according to a designed pile position, using a steel chisel and lime marks to position a base and a frame, checking the stability and the verticality of the base and the frame, rotating a pile planting platform through a rotating motor 360, rotating the pile planting platform firstly during construction, rotating a drilling system to the position above the pile position, arranging a prefabricated pile hole in advance at the pile sinking position through the drilling system, so that pile sinking is completed quickly and stably, avoiding broken piles caused by easy burst or deviation of sinking angles of the hanging piles during pile striking, improving pile sinking efficiency, withdrawing the drilling system after drilling is completed, rotating the pile planting platform through the rotating motor to rotate a hydraulic pile sinking system to the position above the pile position, sleeving the top ends of the hanging piles through a bolt ring of a stranded wire on one of a lifting system, the bottom end of the hanging pile is sleeved with a fastening ring of a stranded wire on the other lifting system to be lifted, so that the top end of the hanging pile is installed in a connecting ring of the buffer rod, the bottom end of the hanging pile is inserted into a drilled hole of the pile position, when the hanging pile is hit by the hydraulic striking hammer in the pile sinking process, the hanging pile is prevented from being directly hit by the buffer rod in a buffering mode, the top end of the hanging pile is damaged, an electric element in the device is controlled through a numerical control system, and the numerical control system adopts a single chip microcomputer and is conventional equipment in a computer control program.
The drilling system, the hydraulic pile sinking system and the lifting system are allThe pile foundation drilling system is a common technical structure for the existing pile foundation construction, is not limited, and can be used for realizing drilling work, hydraulically hammering a hanging pile and lifting the equipment for hanging the pile, and the drilling system is disclosed as an example " CN214832698U The drilling device in the disclosed precast pile sinking equipment can also be realized by a hydraulic pile sinking system such as the open " CN216339525U The pile pressing machine in the pile sinking equipment for pressing and driving the combined precast pile can also be realized, and the rotating motor is a high-power permanent magnet motor.
In order to facilitate the position of the movable rack, in the embodiment, the base comprises a rectangular base and a corner base, a splicing strip is arranged at one end of the base, a splicing groove is formed in the other end of the base, splicing plates are arranged at two ends of the bottom of the base, splicing holes are formed in the splicing plates, the base can slide for a long distance through the splicing rectangular base or the corner base and assist the rack to slide for a long distance, or the assist rack to turn, and the splicing plate is connected with the two bases through the splicing strip in a butt joint mode and then penetrates through bolts to be in butt joint, so that the connection stability is improved.
In order to conveniently strike the driven pile, in the embodiment, the hydraulic driven pile system comprises a first support, a hydraulic driving hammer and a buffering pile, a main slide rail and an auxiliary slide rail are arranged on the first support, the auxiliary slide rail is positioned on two sides of the main slide rail, the buffering pile is connected with the main slide rail and the auxiliary slide rail through a screw rod, a striking seat is arranged at the top of the buffering pile, a connecting ring is arranged at the bottom of the buffering pile, a connecting bolt is arranged on the connecting ring, the hydraulic driving hammer is arranged at the top of the main slide rail and the auxiliary slide rail, a second sliding motor is arranged on the hydraulic driving hammer and connected with the main slide rail, a fixing ring is arranged at the bottom of the first support, the buffering rod is connected with the top of the driven pile, so that the driven pile is perpendicular to the axes of the buffering rod and the hydraulic driving hammer, and when the hydraulic driving hammer strikes the driven pile, the buffering rod is used for preventing direct striking of the driven pile, the messenger hangs the top of stake and takes place the damage, hydraulic pressure hits the hammer according to hanging the stake sinking depth degree and hit the position that drops apart from through second sliding motor adjustment hydraulic pressure hit the hammer, the buffer beam passes through the lead screw and slides with main slide rail and vice slide rail and fix on first support, and promote the buffer beam to the eminence through lifting system after work is accomplished, and be provided with bolt and main slide rail and vice slide rail connection on the buffer beam, hydraulic pressure hits the hammer and passes through second sliding motor adjusting position to eminence.
In order to improve pile sinking efficiency, in this embodiment, the drilling system includes a second support, a first telescopic device, a second telescopic device and a drilling device, the first telescopic device includes a second hydraulic motor, a second hydraulic telescopic rod is disposed on the second hydraulic motor, a mounting bracket is disposed at an end of the second hydraulic telescopic rod, the second telescopic device includes a third hydraulic motor, a third hydraulic telescopic rod is disposed on the second hydraulic motor, the third hydraulic motor is fixed on the mounting bracket, the drilling device is mounted at an end of the third hydraulic telescopic rod, the drilling device includes a motor box, a first driving motor and a drill bit, the first driving motor is mounted in the motor box, an output end of the first driving motor is connected with the drill bit, a prefabricated pile hole is formed in a pile sinking position in advance by the drilling system, so as to complete pile sinking more rapidly and stably by pile hanging, avoid when beating the pile sinking, hang the pile and explode the bits of broken glass easily or sink into the angle and appear the deviation and cause bad stake to improve pile sinking efficiency, when drilling, drill down through first driving motor drive drill bit, adjust the degree of depth of drilling through the cooperation of second hydraulic motor and second hydraulic stem and third hydraulic motor and third hydraulic stem, when the drilling is all expanded with the third hydraulic stem to the degree of depth of drilling is two lengths of hanging the stake.
In order to facilitate lifting of the hanging pile, in this embodiment, the lifting system includes a winch frame, a winch and a second driving motor, input shafts on two sides of the winch are mounted on the winch frame, an output end of the second driving motor is connected with an input shaft of the winch, a twisted wire is wound on the winch, a bolt ring is arranged at an end of the twisted wire, at least two lifting systems are arranged, when the hanging pile is lifted, the top end of the hanging pile can be sleeved by the bolt ring of the twisted wire on one lifting system, the bottom end of the hanging pile can be sleeved by the bolt ring of the twisted wire on the other lifting system for lifting, so that the top end of the hanging pile is arranged in the connecting ring of the buffer rod, the bottom end of the hanging pile is inserted into the drilled hole of the pile position after passing through the fixing ring, a ladder stand is arranged on the first support, when the hanging pile is arranged in the connecting ring of the buffer rod, a worker can climb to a joint of the hanging pile and the connecting ring through the ladder stand, and the pile is connected through a connecting bolt and then is dismantled after pile sinking is finished.
In order to improve the stability of the rack sliding on the base, in this embodiment, the sliding groove includes a main sliding groove and an auxiliary sliding groove, the auxiliary sliding groove is disposed on two sides of the main sliding groove, the first hydraulic rod is connected with the main sliding groove through a sliding seat, and the rack is connected with the auxiliary sliding groove through a sliding rod.
In order to reduce the resistance of the frame sliding on the base, in this embodiment, a pulley is disposed on the sliding rod, and the sliding seat and the pulley are coated with lubricating oil.
The first sliding motor and the second sliding motor are stepping sliding motors, and the first driving motor and the second driving motor are high-power servo motors.
In this embodiment, the method includes the following steps:
firstly, construction preparation, which mainly comprises the steps of entering inspection, process test, site preparation and measurement lofting, wherein a site is leveled before the pipe pile is constructed, the site is properly hardened, temporary drainage is made, the measurement lofting is carried out according to a designed pile position, the allowable deviation of the pile position is 50mm, and steel chisel and lime marks are used;
secondly, the pile driver is in place, the base and the rack are in place without errors, and the stability and the verticality of the base and the rack are checked;
prefabricating pile sinking holes, and drilling pile sinking pore passages at the pile positions by using a drilling system;
fourthly, the hanging pile is in place and corrected in verticality, the hanging pile is bound and lifted to a pile sinking system by using a lifting system, a connecting ring of a buffer pile is connected with the hanging pile, the pile body is inserted into the prefabricated pile sinking hole and is corrected for multiple times to be qualified, pile sinking is started, the pile body, the pile head and the hydraulic striking hammer are required to be coincident in axis, and the allowable deviation of the verticality is 1%;
hammering the sunk pile, hammering with a lower drop distance at the beginning, hammering according to the specified drop distance after the hung pile is stably embedded into the soil for a certain depth, and observing whether the hydraulic driving hammer, the pile head and the pile body are kept on the same axis at any time by using a measuring instrument when the pile is sunk;
step six, pile splicing, namely stopping pile sinking when a lower section of pile sinks to a position where the pile top is 0.5-1.0 m away from the ground, hanging an upper section of pile for alignment, allowing the alignment tolerance of the upper section of pile and the lower section of pile to be 10mm, cleaning the alignment ends of the upper section of pile and the lower section of pile, welding, naturally cooling to natural temperature after welding, installing a hoop after welding inspection is qualified, and then brushing an anticorrosive coating on a welding area;
step seven, pile sinking is continued after pile splicing is finished, and hammering can be stopped when the pouring depth meets the design requirement;
and step eight, moving the machine, driving the rack to slide on the base by utilizing a sliding motor matched with the sliding seat, and enabling the base to slide for a long distance through a spliced rectangular base or a corner base to assist the rack to slide or assist the rack to turn.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A precast pile sinking construction method is characterized by comprising a base, a rack and pile planting devices, wherein the base is positioned on the front side and the rear side of the rack, the base is a sliding rail, sliding grooves are formed in the sliding rail, first sliding motors are arranged on the two sides of the rack and are in sliding connection with the sliding grooves, first hydraulic machines are mounted on the front side and the rear side of the rack and are positioned at the two ends of the front side and the rear side of the rack, first hydraulic rods are arranged on the first hydraulic machines, sliding seats are arranged at the end parts of the first hydraulic rods and are connected with the sliding grooves, an equipment workbench is mounted at the top of the rack, a control box is mounted on the equipment workbench, a numerical control system is mounted in the control box, a pile planting platform is mounted on the equipment workbench, the pile planting devices are mounted on the pile planting platform, and a rotating motor is arranged on the equipment workbench, the output shaft that rotates the motor is connected with the stake platform of planting, the stake device of planting includes hydraulic pressure pile sinking system, drilling system and hoist system, hydraulic pressure pile sinking system and drilling system symmetry are installed on the stake platform of planting, the mount is installed at hydraulic pressure pile sinking system and drilling system's top, hoist system installs on the mount.
2. The precast pile sinking construction method according to claim 1, wherein the base comprises a rectangular base and a corner base, one end of the base is provided with a splicing strip, the other end of the base is provided with a splicing groove, splicing plates are arranged at two ends of the bottom of the base, and splicing holes are formed in the splicing plates.
3. A precast pile sinking method according to claim 2, wherein the hydraulic pile sinking system comprises a first support, a hydraulic driving hammer and a buffering pile, the first support is provided with a main slide rail and an auxiliary slide rail, the auxiliary slide rail is located on two sides of the main slide rail, the buffering pile is connected with the main slide rail and the auxiliary slide rail through a lead screw, the top of the buffering pile is provided with a driving seat, the bottom of the buffering pile is provided with a connecting ring, the connecting ring is provided with a connecting bolt, the hydraulic driving hammer is mounted on the tops of the main slide rail and the auxiliary slide rail, the hydraulic driving hammer is provided with a second sliding motor connected with the main slide rail, and the bottom of the first support is provided with a fixing ring.
4. A precast pile sinking construction method according to claim 3, wherein the drilling system comprises a second support, a first telescopic device, a second telescopic device and a drilling device, the first telescopic device comprises a second hydraulic motor, a second hydraulic telescopic rod is arranged on the second hydraulic motor, a mounting frame is arranged at the end part of the second hydraulic telescopic rod, the second telescopic device comprises a third hydraulic motor, a third hydraulic telescopic rod is arranged on the second hydraulic motor, the third hydraulic motor is fixed on the mounting frame, the drilling device is arranged at the end part of the third hydraulic telescopic rod, the drilling device comprises a motor box, a first driving motor and a drill bit, the first driving motor is arranged in the motor box, and the drill bit is connected with the output end of the first driving motor.
5. A precast pile sinking method as claimed in claim 4, wherein the lifting system comprises a winch frame, a winch and at least two second driving motors, the input shafts of both sides of the winch are installed on the winch frame, the output end of the second driving motor is connected with the input shaft of the winch, the winch is wound with a stranded wire, the end of the stranded wire is provided with a bolt ring, and the lifting system is provided with at least two.
6. A precast pile sinking construction method as claimed in claim 5, wherein the slide groove comprises a main slide groove and an auxiliary slide groove, the auxiliary slide groove is disposed at both sides of the main slide groove, the first hydraulic rod is connected to the main slide groove through a slide carriage, and the frame is connected to the auxiliary slide groove through a slide rod.
7. A precast pile sinking method according to claim 6, wherein the sliding rod is provided with a pulley, and the sliding base and the pulley are coated with a lubricating oil.
8. A precast pile sinking method as claimed in claim 7, comprising the steps of:
firstly, construction preparation, which mainly comprises the steps of entering inspection, process test, site preparation and measurement lofting, wherein a site is leveled before the pipe pile is constructed, the site is properly hardened, temporary drainage is made, the measurement lofting is carried out according to a designed pile position, the allowable deviation of the pile position is 50mm, and steel chisel and lime marks are used;
secondly, the pile driver is in place, the base and the rack are in place without errors, and the stability and the verticality of the base and the rack are checked;
prefabricating pile sinking holes, and drilling pile sinking pore passages at the pile positions by using a drilling system;
fourthly, the hanging pile is in place and corrected in verticality, the hanging pile is bound and lifted to a pile sinking system by using a lifting system, a connecting ring of a buffer pile is connected with the hanging pile, the pile body is inserted into the prefabricated pile sinking hole and is corrected for multiple times to be qualified, pile sinking is started, the pile body, the pile head and the hydraulic striking hammer are required to be coincident in axis, and the allowable deviation of the verticality is 1%;
hammering the sunk pile, hammering with a lower drop distance at the beginning, hammering according to the specified drop distance after the hung pile is stably embedded into the soil for a certain depth, and observing whether the hydraulic driving hammer, the pile head and the pile body are kept on the same axis at any time by using a measuring instrument when the pile is sunk;
step six, pile splicing, namely stopping pile sinking when a lower section of pile sinks to a position 0.5-1.0 m away from the ground to the pile top, hanging an upper section of pile for alignment, wherein the allowable deviation of the alignment of the upper section of pile and the lower section of pile plane is 10mm, cleaning the alignment ends of the upper section of pile and the lower section of pile, welding the upper section of pile and the lower section of pile after the alignment ends of the upper section of pile and the lower section of pile are cleaned, naturally cooling the welded pile to natural temperature, installing a hoop after the welding is detected to be qualified, and then brushing an anticorrosive coating on a welding area;
step seven, pile sinking is continued after pile splicing is finished, and hammering can be stopped when the pouring depth meets the design requirement;
and step eight, moving the machine, driving the rack to slide on the base by utilizing a sliding motor matched with the sliding seat, and enabling the base to slide for a long distance through a spliced rectangular base or a corner base to assist the rack to slide or assist the rack to turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210669427.5A CN115059071A (en) | 2022-06-14 | 2022-06-14 | Pile sinking construction method for precast pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116876498A (en) * | 2023-09-06 | 2023-10-13 | 南通泰胜蓝岛海洋工程有限公司 | Calibration method for pile sinking positioning frame hanging installation |
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