CN114658367A - Push-type self-wall-protecting bored pile spiral drill bit and drilling method - Google Patents
Push-type self-wall-protecting bored pile spiral drill bit and drilling method Download PDFInfo
- Publication number
- CN114658367A CN114658367A CN202210264518.0A CN202210264518A CN114658367A CN 114658367 A CN114658367 A CN 114658367A CN 202210264518 A CN202210264518 A CN 202210264518A CN 114658367 A CN114658367 A CN 114658367A
- Authority
- CN
- China
- Prior art keywords
- wall
- drill bit
- main
- protecting
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000004567 concrete Substances 0.000 claims abstract description 55
- 239000002002 slurry Substances 0.000 claims abstract description 40
- 239000002689 soil Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 230000001174 ascending effect Effects 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 6
- -1 simultaneously Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 12
- 239000004568 cement Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000007790 scraping Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
-
- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of constructional engineering, in particular to a push-type self-wall-protecting bored concrete pile spiral drill and a drilling method. Comprises a wall protection outer cylinder with openings at the upper end and the lower end and a main shaft coaxially arranged in the wall protection outer cylinder; the main shaft is provided with a helical blade; the helical blade is connected with the inner wall of the outer cylinder of the protecting wall; the main shaft is hollow, and the lower end of the main shaft is sleeved with a main drill bit capable of sliding up and down; the lower end of the main shaft is connected with the outer cylinder of the protective wall through a shaft lever; the shaft lever is provided with a blade seat capable of axially sliding; the blade seat is provided with blades; the side wall of the outer protecting wall cylinder is provided with a through hole matched with the corresponding blade; a movable rod is hinged between the main drill bit and the blade seat; auxiliary drill bits are distributed on the side wall of the movable rod; the blade is provided with a slurry outlet for outputting concrete slurry and a liquid outlet for outputting an accelerating agent. The invention can realize the cement-mixed soil self-retaining wall, and can realize that cement paste and an accelerating agent are injected into the wall-protecting layer and stirred to quickly form the cement-mixed soil self-retaining wall while forming holes.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a push-type self-wall-protecting bored concrete pile spiral drill and a drilling method.
Background
The cast-in-place pile system is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage and cast-in-place concrete in the pile hole, and the cast-in-place pile can be divided into a immersed tube cast-in-place pile, a cast-in-place pile and a cast-in-place pile according to different hole forming methods.
The existing pore-forming cast-in-place pile has two types of artificial pore-forming and mechanical pore-forming:
the manual hole-forming cast-in-place pile adopts manual excavation, and the reinforced concrete retaining wall has less required equipment, can be simultaneously cast at one time after large-area hole forming is finished, reduces field cross operation and reduces the cost of casting equipment; the pile bottom is thoroughly cleaned, the pile forming quality is high and stable, the cost is high but controllable, and the bearing capacity of a single pile with the same section is high;
however, because the workers need to go down the well for operation, the labor intensity of the workers is high, the safety risk of the workers in the well is large, the pile forming depth generally can not exceed 16 meters, meanwhile, the workers need more workers, the progress is slow, the workers are difficult to organize, the cost of the wall protection material is high, and the like
Secondly, most of the existing mechanical pore-forming cast-in-place piles adopt the modes of rotary drilling pore-forming and mechanical impact pore-forming
The rotary digging bored concrete pile has the advantages that the rotary digging bored concrete pile adopts the rotary digging steel pile casing retaining wall or the slurry retaining wall, so that the required operation personnel are few, the labor intensity of the personnel is low, the single stratum progress is fast, the operation cost is lower than that of the manual pile, the underground operation risk is avoided, and the pile forming depth is not limited; the disadvantages are that: the rotary drilling hole-forming method has the advantages that the rotary drilling hole-forming method is high in cost due to the fact that a plurality of devices are needed by the retaining wall, the pile bottom cannot be thoroughly cleaned, sediment exists, the hole-forming quality is unstable, the bearing capacity of a single pile with the same cross section is lower than that of an artificial pile, the waste of concrete in the complex stratum is large, the cost is uncontrollable, and sometimes the cost is far beyond that of the artificial pile.
The impact hole-forming cast-in-place pile adopts the impact hole-forming and mud wall protection, is suitable for complex strata, has low labor intensity of workers, but has slow progress of impacting the pile, high cost, large field damage and general pile-forming quality.
Disclosure of Invention
Aiming at the problems, the invention provides the push-type self-wall-protection bored pile spiral drill bit which can realize the self-wall protection of cement-mixed soil, and can realize the rapid formation of the cement-mixed soil wall protection by injecting cement slurry and an accelerating agent into the wall protection layer and stirring while forming the hole.
In order to realize the purpose, the invention adopts the technical scheme that:
a push-type self-wall-protecting hole-forming cast-in-place pile spiral drill bit comprises a wall-protecting outer cylinder with openings at the upper end and the lower end, and a main shaft coaxially arranged in the wall-protecting outer cylinder; the main shaft is provided with a helical blade; the helical blade is connected with the inner wall of the outer protecting wall cylinder; the main shaft is hollow, and the lower end of the main shaft is sleeved with a main drill bit capable of sliding up and down; the lower end of the main shaft is connected with the outer wall protecting cylinder through a shaft lever; the shaft lever is provided with a blade seat capable of axially sliding; the blade seat is provided with blades; the side wall of the wall protection outer cylinder is provided with a through hole matched with the corresponding blade; a movable rod is hinged between the main drill bit and the blade seat; auxiliary drill bits are distributed on the side wall of the movable rod; and the blade is provided with a slurry outlet for outputting concrete slurry and a liquid outlet for outputting an accelerating agent.
Compared with the prior art, the beneficial effects of the technical scheme are as follows:
the dado urceolus and main drill bit synchronous revolution, broken earth is carried out through helical blade during drilling, in drilling, can utilize main drill bit's extrusion force to make the blade stretch out from dado urceolus outer wall, the dado urceolus is the operation of being in milk to the inner wall in hole, concrete thick liquid and accelerator and earth flash mixed form the concrete inner wall, the blade that stretches out is when realizing reaming, can also be with the earth that the reaming produced simultaneously with concrete mixing stirring, realize the synchronous completion of concrete dado, when moving back the hole, the main drill bit front end loses the extrusion force, in the automatic dado urceolus that retracts of blade, the dado urceolus of being convenient for scrapes the flat operation to the dado.
As a further improvement of the above technical solution: the input end of the grout outlet is communicated with the grouting pipe; the input end of the liquid outlet hole is communicated with the liquid injection pipe; and the grouting pipe and the liquid injection pipe enter the main shaft from the side wall of the lower end of the main shaft.
The beneficial effect of the improvement is as follows: and the outside concrete and the accelerating agent are injected into the grout outlet and the grout outlet through the grouting pipe and the liquid injection pipe.
As a further improvement of the above technical solution: the upper end of the main drill bit is connected with a main drill shaft; the main drill shaft is sleeved in the main shaft; the top end of the main drill shaft is provided with a limiting piece.
The beneficial effect of the improvement is as follows: the lifting of the main drill bit is controlled through the lifting of the main drill shaft, and meanwhile the limiting piece can limit the descending distance of the main drill bit.
As a further improvement of the above technical solution: and a compression spring is arranged on the main drill shaft.
The beneficial effect of the improvement is as follows: through the compression spring, the main drill bit can automatically reset and descend when losing pressure, so that the blades are controlled to automatically retract into the outer protection wall barrel.
As a further improvement of the above technical solution: and a torsional spring is arranged at the hinged part of the movable rod and the main drill bit or the hinged part of the movable rod and the blade seat.
The beneficial effect of the improvement is as follows: the automatic reset swing of the movable rod is controlled by the torsion spring, so that the main drill bit is controlled to automatically descend and reset and the blades are controlled to automatically retract into the outer cylinder of the protective wall.
As a further improvement of the above technical solution: and water outlet holes are distributed on the outer wall of the main shaft.
The beneficial effect of the improvement is as follows: the inlet tube is used for inputing the external water into the dado urceolus to moist inside earth and cool off to drill bit each part, improve drilling efficiency, the inside earth of dado urceolus can be lastingly siphoned away with the suction pipe simultaneously.
As a further improvement of the above technical solution: the shaft rod is provided with a first limiting adjusting piece capable of being movably positioned or the main drill shaft is provided with a second limiting adjusting piece capable of adjusting the position up and down.
The beneficial effect of the improvement is as follows: the position of the first limit adjusting piece on the shaft lever is moved, so that the moving range of the blade seat is controlled, and the extending length of the blade is adjusted; or the position of the second limit adjusting part on the main drill shaft is moved, so that the ascending distance of the main drill bit is controlled, and the extending length of the blade is adjusted; wherein first spacing regulating part and the spacing regulating part of second all can be for cyclic annular, and set screw through the lateral wall is fixed.
As a further improvement of the above technical solution: the upper end of the main drill bit is connected with the telescopic cylinder through a connecting rod; the telescopic cylinder is arranged in the main shaft or at the upper end of the outer protecting wall cylinder.
The beneficial effects of the ascending improvement are as follows: the distance that main drill bit rises is controlled through the telescoping cylinder to realize adjusting the length that the blade stretches out, the telescoping cylinder can be the hydro-cylinder, adopts the telescoping cylinder control back, can realize continuous adjusting blade extension length, realizes can adjusting the length that the blade stretches out at the in-process of drill bit.
The method for drilling by adopting the pushing type self-protecting wall-forming bored concrete pile spiral drill comprises the following steps:
drilling operation: the outer protective wall cylinder and the main drill bit are driven to rotate while extruding and drilling downwards, and the main drill bit rises to drive the blade seat to move, so that the blade extends out of the through hole; the main drill bit and the auxiliary drill bit collect soil generated by drilling in the wall protecting outer cylinder in the drilling process and convey the soil out through the helical blades; the extended blades scrape and crush soil on the wall of the hole, simultaneously, concrete slurry is sprayed out from the slurry outlet, and an accelerator is sprayed out from the slurry outlet and uniformly mixed with the crushed soil, and then is solidified to form a concrete retaining wall;
hole withdrawing operation: after drilling is finished, stopping injecting concrete slurry and an accelerator, enabling the drill bit to integrally ascend and move, enabling the front end of the main drill bit to lose extrusion force, and enabling the blades to retract into the outer protection wall cylinder; and scraping the concrete retaining wall by the retaining wall outer cylinder in the ascending process, and finally forming a cast-in-place pile hole with the concrete retaining wall.
Another method for drilling by adopting the push-type self-wall-protecting hole-forming cast-in-place pile spiral drill bit comprises the following steps:
reducing operation: adjusting the position of the first limit adjusting part or the second limit adjusting part or controlling the telescopic amount of the telescopic cylinder to set the extending amount of the blade according to the diameter of the bored concrete pile hole;
drilling operation: the outer protective wall cylinder and the main drill bit are driven to rotate while extruding and drilling downwards, and the main drill bit rises to drive the blade seat to move, so that the blade extends out of the through hole; the main drill bit and the auxiliary drill bit collect soil generated by drilling in the wall protecting outer cylinder in the drilling process and convey the soil out through the helical blades; the extended blades scrape and crush soil on the wall of the hole, simultaneously, concrete slurry is sprayed out from the slurry outlet, and an accelerating agent is sprayed out from the slurry outlet, uniformly mixed with the crushed soil and then solidified to form the concrete retaining wall;
hole withdrawing operation: after drilling is finished, stopping injecting concrete slurry and an accelerator, enabling the drill bit to integrally ascend and move, enabling the front end of the main drill bit to lose extrusion force, and enabling the blades to retract into the outer protective wall cylinder; and scraping the concrete retaining wall by the retaining wall outer cylinder in the ascending process, and finally forming a cast-in-place pile hole with the concrete retaining wall.
In the drilling method, after the mud suction pipe and the water inlet pipe are additionally arranged on the drill bit, water can be continuously input into the outer cylinder of the protective wall through the water inlet pipe in the drilling operation process, so that drill bit parts are cooled and soil is wetted, the drilling efficiency is improved, and the mud suction pipe can continuously suck away the soil entering the inner part of the outer cylinder of the protective wall.
Drawings
FIG. 1 is a schematic view of the external structure of the drill bit of the present invention.
Fig. 2 is a schematic cross-sectional view of a gathering blade of the drill bit of the present invention.
Fig. 3 is a schematic cross-sectional view of the flaring blades of the drill bit of the present invention.
Fig. 4 is a schematic structural view of a blade seat.
Fig. 5 is a schematic structural view of the back of the blade seat.
Fig. 6 is a schematic view of a structure in which a first regulating member is mounted in a drill bit member.
Fig. 7 is a schematic view of a structure in which a second regulating member is mounted in a drill bit member.
Fig. 8 is a schematic structural view of a drill bit with a mud suction pipe and a water inlet pipe installed therein.
Fig. 9 is a schematic structural diagram of the lifting control of the drill bit through the telescopic cylinder.
In the figure: 1. a wall protection outer cylinder; 2. a blade seat; 3. a blade; 4. a shaft lever; 6. a limiting member; 7. a main drill bit; 71. a main drill shaft; 8. a compression spring; 9. a movable rod; 10. a secondary drill bit; 11. a grouting pipe; 12. a liquid injection pipe; 13. a main shaft; 14. a helical blade; 15. a water outlet hole; 17. a connecting rod; 18. a telescopic cylinder; 31. a slurry outlet; 32. a liquid outlet hole; 19. a first limit adjusting member; 20. a second limit adjusting member; 21. a shaft hole; 22. and (4) a flange sleeve.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Referring to fig. 1 to 9, in a specific embodiment, a push type self-retaining bored pile auger bit comprises a retaining outer cylinder 1 with open upper and lower ends, and a main shaft 13 coaxially arranged in the retaining outer cylinder 1; the main shaft 13 is provided with a helical blade 14; the helical blade 14 is connected with the inner wall of the wall protection outer cylinder 1; the main shaft 13 is hollow, and the lower end of the main shaft is sleeved with a main drill bit 7 capable of sliding up and down; the lower end of the main shaft 13 is connected with the wall protection outer cylinder 1 through a shaft lever 4; the shaft lever 4 is provided with a blade seat 2 capable of axially sliding; the blade seat 2 is provided with a blade 3; the side wall of the wall protection outer cylinder 1 is provided with a through hole matched with the corresponding blade 3; a movable rod 9 is hinged between the main drill 7 and the blade seat 2; auxiliary drill bits 10 are distributed on the side wall of the movable rod 9; the blade 3 is provided with a slurry outlet 31 for outputting concrete slurry and a liquid outlet 32 for outputting an accelerating agent.
The outer wall of the main shaft 13 is provided with a helical blade 14, and the outer side of the helical blade 14 is connected with the inner wall of the outer wall protection barrel 1; the main shaft 13 is a hollow shaft, and a main drill bit 7 capable of ascending and descending is inserted into an end opening at the lower end of the main shaft; the lower end of the main shaft 13 is connected with the outer protecting wall cylinder 1 through a shaft rod 4 which is distributed in an annular shape; the blade seat 2 is sleeved on the shaft lever 4 through the shaft hole 21; the back of the blade seat 2 can be provided with a flange sleeve 22 to improve the strength, and the flange sleeve 22 is coaxial with the shaft hole 21 and is sleeved on the shaft lever 4 together; the blade seat 2 is vertical plate-shaped, the surface contacting with the outer cylinder 1 of the protecting wall can be a circular arc surface, and is just matched with the inner wall of the outer cylinder 1 of the protecting wall, blades 3 are distributed on the blade seat in an up-and-down manner, and the blades 3 are rod-shaped and can be generally rectangular rod-shaped; the number of the blades 3 on the blade seat 2 is generally two, and can also be three or more; the blade 3 is provided with a slurry outlet 31 or a liquid outlet 32; holes communicated with the slurry outlet holes 31 or the liquid outlet holes 32 are formed in the blade seat 2 and are connected with the corresponding grouting pipes 11 or the corresponding liquid injection pipes 12; auxiliary drill bits 10 are uniformly distributed on the lower side surface of the movable rod 9; one end of the movable rod 9 is connected with the blade seat 2 through a hinged shaft, and the other end of the movable rod is connected with the side wall of the main drill bit 7 through a hinged shaft; when the main drill bit 7 goes up and down, the movable rod 9 is driven to swing, so that the blade seat 2 is driven to slide on the shaft lever 4, and the expansion of the blades 3 is controlled; the perforation on the outer cylinder 1 of the protecting wall and the movement of the blade 3, the shape of the perforation is the same as the cross section shape of the blade 3; when the blade 3 retracts into the outer cylinder 1, the blade 3 can be scraped by the perforation.
Wherein, the blades 3 can be spirally distributed on the wall-protecting outer cylinder 1, so that the drill has downward thrust when drilling; the drilling efficiency is improved, and correspondingly, the through holes are also spirally distributed on the wall protection outer cylinder 1.
In this embodiment, the length of the outer casing 1 is generally about one meter, and soil generated by crushing the drill bit enters the outer casing 1, and is then conveyed upwards by the helical blades 14 and discharged.
As shown in fig. 2, further optimization is performed based on the above embodiment: the input end of the grout outlet 31 is communicated with the grouting pipe 11; the input end of the liquid outlet 95 is communicated with the liquid injection pipe 12; the grouting pipe 11 and the liquid injection pipe 12 enter the main shaft 13 from the side wall of the lower end of the main shaft 13 and are arranged in the main shaft 13.
The grouting pipe 11 and the liquid injection pipe 12 are arranged in the main shaft 13, and the side wall of the lower end of the main shaft 13 is provided with a hole for connecting the grouting pipe 11 and the liquid injection pipe 12 with the blade seat after passing through; the tail ends of the grouting pipe 11 and the liquid injection pipe 12 can be communicated with an external supply source through a rotary joint; the rotary joint may be provided at the upper end of the main shaft 13; the rotary joint generally comprises two rings which can rotate mutually, a sealed cavity is formed inside the rotary joint, the lower end ring is connected with the main shaft 13, the upper end ring can rotate, the lower end ring is communicated with the grouting pipe 11 and the liquid injection pipe 12, and the upper end ring is communicated with an external pipeline; concentric annular cavities which are mutually isolated are formed inside the rotary joint; respectively for containing concrete slurry or accelerator.
As shown in fig. 2-3, further optimization is performed based on the above embodiments: the upper end of the main drill bit 7 is connected with a main drill shaft 71; the main drill shaft 71 is sleeved in the main shaft 13; the top end of the main drill shaft 71 is provided with a limiting piece 6.
The limiting member 6 is a disc or circular ring connected with the main drill shaft 71, and when the limiting member is circular ring, the limiting member is sleeved on the main drill shaft 71 and connected with the main drill shaft 71 through a set screw on the side wall, and the position of the circular ring can be adjusted by moving up and down, so that the range of the main drill shaft 71 moving up and down is controlled.
As shown in fig. 6, further optimization is performed based on the above embodiment: the main drill shaft 71 is provided with a compression spring 8.
When main drill bit 7 is when drilling, main drill bit 7 receives the extrusion force of earth for main drill bit 7 rises, thereby compress compression spring 8, thereby make blade 3 stretch out from the perforation of dado urceolus 1 lateral wall, strike off earth, form the space of dado, roll back after main drill bit 7 accomplishes the drilling, main drill bit 7 does not receive the extrusion force of earth, compression spring 8's elasticity makes main drill bit 7 descend, thereby drive blade 3 retracts in dado urceolus 1.
Further optimization is carried out on the basis of the embodiment: and a torsional spring is arranged at the hinged part of the movable rod 9 and the main drill bit 7 or the hinged part of the movable rod 9 and the blade seat 2.
Besides the automatic extension and retraction of the blades 3 are realized by the compression spring 8, the automatic extension and retraction of the blades 3 can also be realized by a torsion spring, and the torsion spring at the hinged part can drive the movable rod 9 to swing, so that the main drill 7 is driven to automatically ascend and the blades 3 are driven to automatically extend and retract.
As shown in fig. 8-9, further optimization is based on the above embodiment: and water outlet holes are distributed on the outer wall of the main shaft 13.
The main shaft 13 is the quill shaft, and the upper end can be connected the water supply through rotary joint for in importing main shaft 13 with external water, then from the apopore blowout on the 13 outer walls of main shaft, thereby wet inside earth and cool off to drill bit each part, improve drilling efficiency.
As shown in fig. 6-7, further optimization is based on the above embodiment: the shaft lever 4 is provided with a first limit adjusting piece 19 which can be movably positioned, or the main drill shaft 71 is provided with a second limit adjusting piece 20 which can be adjusted up and down. The position of the first limiting adjusting piece on the shaft lever is moved, so that the moving range of the blade seat is controlled, and the extending length of the blade is adjusted; or the position of the second limit adjusting part on the main drill shaft is moved, so that the ascending distance of the main drill bit is controlled, and the extending length of the blade is adjusted; wherein first spacing regulating part and the spacing regulating part of second all can be cyclic annular, and it is fixed through the holding screw of lateral wall.
As shown in fig. 9, further optimization is performed based on the above embodiment: the upper end of the main drill bit 7 is connected with a telescopic cylinder 18 through a connecting rod 17; the telescopic cylinder 18 is arranged in the main shaft 13 or at the upper end of the outer protective wall cylinder 1. The telescopic cylinder is used for controlling the ascending distance of the main drill bit, so that the extending length of the blade can be adjusted, the telescopic cylinder can be an oil cylinder, the extending length of the blade can be continuously adjusted after the telescopic cylinder is used for controlling, and the extending length of the blade can be adjusted in the process of drilling. Or the telescopic cylinder 18 is arranged at the upper end of the outer protective wall cylinder 1, and then the telescopic cylinder 18 is connected with an external control system through a rotary electric connector.
The method for drilling by adopting the pushing type self-protecting wall-forming bored concrete pile spiral drill comprises the following steps:
drilling operation: the outer protective wall cylinder 1 and the main drill bit 7 are driven to rotate while extruding and drilling downwards, the main drill bit 7 rises to drive the blade seat 2 to move, and therefore the blade 3 extends out of the through hole; the main drill bit 7 and the auxiliary drill bit 10 collect soil generated by drilling in the wall protecting outer cylinder 1 in the drilling process and convey the soil out through the helical blades; the extended blades 3 scrape and crush hole wall soil, simultaneously, concrete slurry is sprayed out from the slurry outlet holes 31, and an accelerator is sprayed out from the slurry outlet holes 32 and uniformly mixed with the crushed soil, and then the mixture is solidified to form a concrete retaining wall;
hole withdrawing operation: after drilling is finished, stopping injecting concrete slurry and an accelerator, enabling the drill bit to integrally ascend and move, enabling the front end of the main drill bit 7 to lose extrusion force, and enabling the blades 3 to retract into the outer protecting wall cylinder 1; and scraping the concrete retaining wall by the retaining wall outer cylinder 1 in the ascending process to finally form a cast-in-place pile hole with the concrete retaining wall.
Another method for drilling by adopting the push-type self-wall-protecting hole-forming cast-in-place pile spiral drill bit comprises the following steps:
reducing operation: according to the diameter of the bored concrete pile hole, the extending amount of the blade 3 is set by adjusting the position of the first limit adjusting piece 19 or the second limit adjusting piece 20 or controlling the extending amount of the telescopic cylinder 18;
drilling operation: the driving protection wall outer cylinder 1 and the main drill bit 7 rotate while extruding and drilling downwards, and the main drill bit 7 rises to drive the blade seat 2 to move, so that the blade 3 extends out of the through hole; the main drill bit 7 and the auxiliary drill bit 10 collect soil generated by drilling in the wall protecting outer cylinder 1 in the drilling process and convey the soil out through the helical blades; the extended blades 3 scrape and crush hole wall soil, simultaneously, concrete slurry is sprayed out from the slurry outlet holes 31, and an accelerator is sprayed out from the slurry outlet holes 32 and uniformly mixed with the crushed soil, and then the mixture is solidified to form a concrete retaining wall;
hole withdrawing operation: after drilling is finished, stopping injecting concrete slurry and an accelerator, enabling the drill bit to integrally ascend and move, enabling the front end of the main drill bit 7 to lose extrusion force, and enabling the blades 3 to retract into the outer protecting wall cylinder 1; and scraping the concrete retaining wall by the retaining wall outer cylinder 1 in the ascending process to finally form a cast-in-place pile hole with the concrete retaining wall.
In the drilling method, after the mud suction pipe and the water inlet pipe are additionally arranged on the drill bit, water can be continuously input into the outer cylinder of the protective wall through the water inlet pipe in the drilling operation process, so that drill bit parts are cooled and soil is wetted, the drilling efficiency is improved, and the mud suction pipe can continuously suck away the soil entering the inner part of the outer cylinder of the protective wall.
The invention has the specific working principle that:
the invention uses a main drilling component 1 to complete the main drilling work of a bored pile hole, uses a blade 3 of a retaining wall outer cylinder 1 to perform reaming operation on the drilled hole, then synchronously pours concrete slurry and an accelerating agent into the inner wall of the bored pile hole, synchronously mixes soil generated by reaming with the concrete slurry and the accelerating agent by using the blade 3 to form a retaining wall of the bored pile hole, and uses the outer wall of the retaining wall outer cylinder 1 to perform scraping operation on the retaining wall.
The technical scheme of the invention is compared with the manual hole-forming cast-in-place pile and the traditional rotary-digging hole-forming cast-in-place pile as follows:
it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, or combinations, or other applications of the inventive concepts and solutions as may be employed without such modifications, are intended to be included within the scope of the present invention.
Claims (10)
1. A push-type self-wall-protecting bored pile auger bit is characterized by comprising a wall-protecting outer cylinder (1) with openings at the upper end and the lower end and a main shaft (13) coaxially arranged in the wall-protecting outer cylinder (1); the main shaft (13) is provided with a helical blade (14); the helical blade (14) is connected with the inner wall of the wall protection outer cylinder (1); the main shaft (13) is hollow, and the lower end of the main shaft is sleeved with a main drill bit (7) capable of sliding up and down; the lower end of the main shaft (13) is connected with the wall protection outer cylinder (1) through a shaft lever (4); the shaft lever (4) is provided with a blade seat (2) capable of axially sliding; the blade seat (2) is provided with blades (3); the side wall of the wall protection outer cylinder (1) is provided with a through hole matched with the corresponding blade (3); a movable rod (9) is hinged between the main drill bit (7) and the blade seat (2); auxiliary drill bits (10) are distributed on the side wall of the movable rod (9); the blade (3) is provided with a slurry outlet (31) for outputting concrete slurry and a liquid outlet (32) for outputting an accelerating agent.
2. Push-type self-retaining bored pile auger bit according to claim 1, wherein the input end of the grout outlet (31) communicates with the grout pipe (11); the input end of the liquid outlet hole (95) is communicated with the liquid injection pipe (12); the grouting pipe (11) and the liquid injection pipe (12) enter the main shaft (13) from the side wall of the lower end of the main shaft (13) and are arranged in the main shaft (13).
3. Push-type self-retaining bored pile auger bit according to claim 1, wherein the main drill bit (7) is connected at its upper end to a main drill shaft (71); the main drill shaft (71) is sleeved in the main shaft (13); the top end of the main drill shaft (71) is provided with a limiting piece (6).
4. Push type self-retaining bored pile auger bit according to claim 1, wherein a compression spring (8) is arranged on the main drill shaft (71).
5. Push type self-retaining bored pile auger bit according to claim 1, wherein a torsion spring is provided at the articulation of the movable rod (9) with the main bit (7) or with the blade seat (2).
6. The push type self-protecting wall-forming bored concrete pile auger bit according to claim 1, wherein water outlet holes are distributed on the outer wall of the main shaft (13).
7. Push-type self-retaining bored pile auger bit according to claim 1, wherein a first limit adjustment member (19) that is movably positioned is provided on the shaft (4) or a second limit adjustment member (20) that is adjustable up and down in position is provided on the main drill shaft (71).
8. Push type self-retaining bored pile auger bit according to claim 1, characterized in that the upper end of the main bit (7) is connected to a telescoping cylinder (18) by a connecting rod (17); the connecting rod (17) and the telescopic cylinder (18) are both arranged in the main shaft (13).
9. The method for drilling a hole by using the push type self-wall-protecting hole-forming pouring pile auger bit according to claim 1, which is characterized by comprising the following steps:
firstly, drilling operation: the wall protecting outer cylinder (1) and the main drill bit (7) are driven to rotate while extruding and drilling downwards, and the main drill bit (7) rises to drive the blade seat (2) to move, so that the blade (3) extends out of the through hole; the main drill bit (7) and the auxiliary drill bit (10) collect soil generated by drilling in the drilling process into the wall protection outer cylinder (1) and convey the soil out through the helical blades (14); the extended blades (3) scrape and crush hole wall soil, simultaneously concrete slurry is sprayed out from the slurry outlet holes (31), and an accelerating agent is sprayed out from the slurry outlet holes (32) and uniformly mixed with the crushed soil, and then the concrete wall is formed after solidification;
secondly, hole withdrawing operation: after drilling is finished, stopping injecting concrete slurry and an accelerator, enabling the drill bit to integrally ascend and move, losing extrusion force at the front end of the main drill bit (7), and enabling the blades (3) to retract into the wall protection outer cylinder (1); the outer protecting wall cylinder (1) scrapes the concrete protecting wall in the ascending process, and finally forms a cast-in-place pile hole with the concrete protecting wall.
10. The method for drilling a hole by adopting the push-type self-wall-protecting hole-forming pouring pile spiral drill bit as claimed in claim 7 or 8, which is characterized by comprising the following steps:
firstly, diameter changing operation: according to the diameter of the bored concrete pile hole, the position of a first limit adjusting piece (19) or a second limit adjusting piece (20) is adjusted or the expansion amount of a telescopic cylinder (18) is controlled to set the extension amount of the blade (3);
secondly, drilling operation: the wall protecting outer cylinder (1) and the main drill bit (7) are driven to rotate while extruding and drilling downwards, and the main drill bit (7) rises to drive the blade seat (2) to move, so that the blade (3) extends out of the through hole; the main drill bit (7) and the auxiliary drill bit (10) collect soil generated by drilling in the drilling process into the wall protection outer cylinder (1) and convey the soil out through the helical blades (14); the extended blades (3) scrape and crush hole wall soil, simultaneously, concrete slurry is sprayed out from the slurry outlet holes (31), and an accelerating agent is sprayed out from the slurry outlet holes (32) and uniformly mixed with the crushed soil, and then the concrete wall is solidified to form a concrete retaining wall;
thirdly, hole withdrawing operation: after drilling is finished, stopping injecting concrete slurry and an accelerator, enabling the drill bit to integrally ascend and move, enabling the front end of the main drill bit (7) to lose extrusion force, and enabling the blades (3) to retract into the wall protection outer cylinder (1); the outer protecting wall cylinder (1) scrapes the concrete protecting wall in the ascending process, and finally forms a cast-in-place pile hole with the concrete protecting wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264518.0A CN114658367A (en) | 2022-03-17 | 2022-03-17 | Push-type self-wall-protecting bored pile spiral drill bit and drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264518.0A CN114658367A (en) | 2022-03-17 | 2022-03-17 | Push-type self-wall-protecting bored pile spiral drill bit and drilling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114658367A true CN114658367A (en) | 2022-06-24 |
Family
ID=82029601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210264518.0A Withdrawn CN114658367A (en) | 2022-03-17 | 2022-03-17 | Push-type self-wall-protecting bored pile spiral drill bit and drilling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114658367A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733369A (en) * | 2023-06-08 | 2023-09-12 | 中建三局集团有限公司 | Hole forming equipment for bored pile in narrow space of cavity and operation method thereof |
| CN117662177A (en) * | 2023-12-29 | 2024-03-08 | 中交城乡建设规划设计研究院有限公司 | Pipe shed construction method based on dragging process |
-
2022
- 2022-03-17 CN CN202210264518.0A patent/CN114658367A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116733369A (en) * | 2023-06-08 | 2023-09-12 | 中建三局集团有限公司 | Hole forming equipment for bored pile in narrow space of cavity and operation method thereof |
| CN116733369B (en) * | 2023-06-08 | 2024-04-26 | 中建三局集团有限公司 | Hole forming equipment for bored pile in narrow space of cavity and operation method thereof |
| CN117662177A (en) * | 2023-12-29 | 2024-03-08 | 中交城乡建设规划设计研究院有限公司 | Pipe shed construction method based on dragging process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114658367A (en) | Push-type self-wall-protecting bored pile spiral drill bit and drilling method | |
| CN109853524B (en) | Construction method of expanded head stiff cement soil composite special-shaped pile | |
| KR930012067B1 (en) | Process for compaction reinforcement grouting or for decompaction drainage and for construction of linear works and plane works in the soils | |
| CN110374500B (en) | Grouped drilling and pile planting construction method | |
| CN108755729B (en) | CFG pile foundation pile cap and pile body integrated construction device and method | |
| CN109083591B (en) | Drilling bored concrete pile body and pile cap integrated drilling pore-forming method | |
| CN114673452A (en) | Push-type self-protection wall-forming cast-in-place pile drill bit and drilling method | |
| CN113846632A (en) | Soil-squeezing pile construction method for reinforcing part of bearing layer | |
| CN116591597B (en) | Rotary drilling rig for highway bridge construction | |
| CN108266131A (en) | Rotate soil compaction bottom expanding drill and method for constructing foundation pile | |
| CN110331936B (en) | Combined drilling bottom-expanding pile-planting construction method | |
| CN210105897U (en) | Throw stone layer stock pore-forming auxiliary device | |
| CN210530738U (en) | Pile system is planted in drilling in groups | |
| CN210768606U (en) | Drilling tool device for spiral soil-squeezing pressure-grouting pile | |
| CN112252308A (en) | Concrete cast-in-place pile with diameter-expanding screw tooth pile section, drill bit device for pile forming and pile forming method | |
| CN115125938B (en) | Composite pile construction method for built-in prefabricated pipe pile | |
| CN109083136B (en) | Anti-overflow thick liquid variable cross section cement soil mixing pile head | |
| CN116291471A (en) | Construction method and tunneling equipment for large-diameter vertical shaft of upper soft and lower hard stratum | |
| CN216920297U (en) | Construction device for long spiral drilling and pressure pouring concrete pile | |
| JP2006312865A (en) | Method for replacing and constructing column, and replaced column | |
| CN113481974B (en) | Construction method of mucky soil carrier pile | |
| CN213709498U (en) | Concrete cast-in-place pile with diameter-expanding screw tooth pile section and drill bit device for pile forming | |
| CN210530745U (en) | Combined drilling bottom-expanding pile-planting system | |
| CN114016499A (en) | Long spiral drill hole pressure-cast concrete pile and construction method and construction device thereof | |
| CN208089229U (en) | Rotate soil compaction bottom expanding drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220624 |