CN117758737A - Self-counterforce three-dimensional drill bit - Google Patents
Self-counterforce three-dimensional drill bit Download PDFInfo
- Publication number
- CN117758737A CN117758737A CN202311242915.9A CN202311242915A CN117758737A CN 117758737 A CN117758737 A CN 117758737A CN 202311242915 A CN202311242915 A CN 202311242915A CN 117758737 A CN117758737 A CN 117758737A
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- drill bit
- rotary cutter
- wings
- stirring
- shell
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- 238000003756 stirring Methods 0.000 claims abstract description 79
- 239000002689 soil Substances 0.000 abstract description 37
- 239000003795 chemical substances by application Substances 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 12
- 230000009471 action Effects 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000004568 cement Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A self-reaction three-dimensional drill bit belongs to the field of drill bits, a fixed wing provided with a counter-force wing is arranged in the drill bit, the fixed wing is meshed with a conical gear of a rotary cutter shaft, a core bar is connected with the fixed wing through a bearing, a grouting (gas) pipe is arranged in the core bar, two ends of a shell are respectively connected with the core bar and the fixed wing, and a stirring blade is connected to the core bar at the bottom of the drill bit. The invention has the advantages that: the fixed wings are singly connected with the drill bit through the bearings, the rotary blades and the three-wing stirring blades are in three-dimensional cross stirring under the action of the counter-force wings, and the air pipes perform air explosion into the stirred soil body, so that the soil body and the curing agent are uniformly mixed, the adaptability to complex stratum is improved, the strength and the integrity of the pile body are improved, and the pile forming quality is greatly improved; the mixing amount of the curing agent is small, the construction cost is low, and the engineering cost is obviously reduced.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a self-reaction three-dimensional drill bit for soft foundation treatment.
Background
The cement mixing pile is suitable for treating soft foundation with saturated soft clay, high water content and other foundation including silt, mucky soil, silt soil, sandy soil, peat soil and other factors. The maximum reinforcement depth of the foundation can reach 30m.
The cement soil reinforcing body formed by the cement soil mixing piles can be used as a composite foundation for vertical bearing, a retaining wall for foundation pit engineering, an impermeable curtain, a large-volume cement stabilized soil and the like, and has simple construction process and low cost.
The construction method has the advantages of no vibration, no noise, no ground bulge, no pollution discharge and no environmental pollution in the construction process, and has no harmful effect on adjacent buildings, thus having better comprehensive economic benefit and social benefit.
The stirring device of the traditional cement-soil stirring pile drill bit is provided with two crossed straight stirring teeth, the rotation number of a drill rod is lower, when the soil with stronger viscosity is encountered, the phenomenon that the stirring teeth are stuck by clay and the drill rod exists, so that the stirring teeth cannot effectively cut soil bodies, slurry (curing agent) and soil cannot be fully mixed, even the phenomenon that the soil cannot be crushed and filled with cement slurry (curing agent) appears in site, the content of cement (curing agent) in a drilling core sample is very small, a formed cement stirring pile does not form a pile, the stirring effect is poor, and the pile body strength cannot meet the design requirement.
Disclosure of Invention
The invention aims to provide a self-reaction three-dimensional drill bit, which can quickly and fully stir a soft soil foundation and a curing agent under the cutting and stirring actions of the drill bit, and improves the strength and the quality of a cement soil stirring pile body.
The invention aims at realizing the following technical scheme: a self-reacting three-dimensional drill bit, characterized in that: the grouting device comprises a shell, a core rod, grouting (air) pipes, fixing wings, counterforce wings, rotary cutter shafts and stirring blades, wherein the fixing wings are arranged in the shell, the counterforce wings are arranged at the lower ends of the fixing wings, symmetrically extend out to the two sides of the fixing wings, conical gears are sleeved on the fixing wings, a plurality of groups of rotary cutter shafts are arranged on the wall of the shell, each group of rotary cutter shafts are oppositely arranged, adjacent rotary cutter shafts are positioned on different planes and staggered with each other, rotary cutter blades are arranged on the rotary cutter shafts, one ends of the rotary cutter shafts, which are positioned in the shell, are conical gears, are meshed with the conical gears sleeved outside the fixing wings, the core rod penetrates through the shell and the fixing wings from top to bottom and is connected with the fixing wings through bearings, the grouting (air) pipes are arranged in the core rod, the upper end of the shell is fixedly connected with the core rod, the lower end of the shell is connected with the fixing wings through bearings, drill tips are arranged at the bottom of the core rod, the stirring blades are connected with the near ends of the drill tips, grouting (air) outlets are arranged on the core rod between the drill tips and the stirring blades, and the grouting (air) pipes are connected with the grouting (air) outlets.
The lateral length of the counterforce wings is larger than the diameter of the drill bit.
The stirring blades are three-wing stirring blades, cross-shaped stirring blades, straight-line stirring blades or zigzag stirring blades.
And an included angle is formed between the extension line of the three-wing stirring blade and the horizontal plane.
The number ratio of the fixed wing to the bevel gear on the rotary cutter shaft is variable.
The beneficial effects of the invention are as follows:
1. the mechanical transmission is more advanced, and the reliability is high
The fixed wing in the stirring drill bit is meshed with the rotary cutter shaft fixed on the drill rod shell through the conical gear, and the stirring blades on the rotary cutter shaft are driven to rotate in the vertical direction under the reaction force of the fixed wing and the rotating force of the drill rod, meanwhile, the stirring blades revolve along with the core rod, the power of the stirring drill bit is provided by the pile driver, the rotating speed of the rotary cutter shaft (rotary cutter blade) can be changed through different rotating speeds of the pile driver, and the reliability is high.
2. Innovative stirring process for greatly improving pile forming quality
The counter-force wing, the vertical rotary-cut blade and the three-wing horizontal stirring blade act together to realize the stirring function of three-dimensional intersection, and simultaneously, high-pressure gas is pumped into the stirring soil body through the air pipe to play a role in gas explosion, so that the soil body and the curing agent (cement and the like) are uniformly mixed, the strength and the integrity of the pile body are improved, and the pile forming quality is improved greatly.
3. Has stronger adaptability to different stratum
The drill bit has the characteristics that the drill bit is difficult to stir into piles, soil bodies can be fully crushed under the combined action of three-dimensional cross mixing and gas explosion, and are uniformly fused with curing agents (cement and the like), so that stirring is more effective, the problems that the soil bodies are difficult to crush due to high viscosity, the curing agents are unevenly mixed with the soil bodies and the like are solved, and the applicability to complex stratum is enhanced.
4. Greatly reduces engineering cost
Compared with the common high-pressure rotary spraying technology under the same working condition, the curing agent (cement and the like) of the drill bit has small mixing amount and low construction cost, and can obviously reduce engineering cost.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Wherein:
1-power device, 2-main tower, 3-arm, 4-drilling rod storehouse, 5-running gear, 6-height (H), 7-hugging device, 8-drill bit joint, 9-slip casting, trachea, 10-core bar, 11-drill bit shell, 12-1 conical gear 1, 12-2-conical gear, 13-bearing 1, 14-conical gear 2, 15-rotary cutter blade, 16-rotary cutter arbor, 17-bearing 2, 18-bearing 3, 19-bearing 4, 20-counter-force wing, 21-slip casting mouth, 22-three-wing stirring vane, 23-stationary vane.
Detailed Description
Examples: the self-reaction three-dimensional drill bit comprises a shell 11, a core bar 10, a fixed wing 23, reaction wings 20, rotary cutter shafts 16 and three-wing stirring blades 22, wherein the fixed wing 23 is installed in the shell 11, the lower end of the fixed wing 23 is fixedly connected with the shell 11 through a bearing 19, the lower end of the fixed wing 23 is provided with the reaction wings 20, the reaction wings 20 symmetrically extend towards two sides of the fixed wing 23, the transverse length of the reaction wings 23 is larger than the diameter of the drill bit, the cross section of the reaction wings 23 is flat and straight or can be cylindrical, the reaction wings 20 on the fixed wing 23 cut into soil during the stirring drilling process of the stirring drill bit, the fixed wing 23 does not rotate along with the drill bit due to the resistance of the soil, a plurality of conical gears 12-1 are sleeved on the fixed wing 23, a plurality of rotary cutter shafts 16 are installed on the wall of the shell 11, each rotary cutter shaft 16 is oppositely arranged, the adjacent rotary cutter shafts 16 are positioned on different planes, the rotary cutter shaft 16 is arranged at one end in the shell 11 and is provided with a bevel gear 12-2 which is respectively meshed with a bevel gear 12-1 sleeved outside the fixed wing 23, the fixed wing 23 and the bevel gears 12-1 and 12-2 on the rotary cutter shaft 16 have variable number ratio, have the functions of speed increasing and speed reducing adjustment on the rotary cutter shaft 16, select corresponding rotating speeds according to different soil properties to carry out stirring construction, overcome the defects that the traditional stirring pile is low in rotating speed and can only adapt to stratum by changing stirring and spraying times, the rotary cutter shaft 16 is provided with rotary cutter blades 15, the rotary cutter blades 15 are in a straight column shape or a bent column shape, the core rod 10 penetrates through the shell 11 and the fixed wing 23 from top to bottom and is connected with the fixed wing 23 in a single action manner through a bearing 18, a grouting (gas) pipe 9 is arranged in the core rod 10, the grouting (gas) pipe 9 can be respectively arranged, the hollow core rod 10 can be used as a grouting (air) pipe 9, the shell 11 is welded with the upper end of the core rod 10, and can be riveted or connected with a flange, the bottom of the core rod 10 is provided with a drill point, the core rod 10 near the drill point is connected with a three-wing stirring blade 22, an extension line of the three-wing stirring blade 22 forms an included angle with the horizontal plane, the length of the counter-force wing 20 is greater than that of the three-wing stirring blade 22, the three-wing stirring blade 22 can also be designed into a cross stirring blade, or a linear stirring blade, or a sawtooth stirring blade, the three-wing stirring blade 22 is perpendicular to the rotary cutting blade 15, the rotary cutting blade 15 on the rotary cutting shaft 16 is driven to rotate in the vertical direction under the action of the rotating force of the drill bit, and simultaneously the rotary cutting shaft and the three-wing horizontal stirring blade 22 on the stirring bit act together, so that the rotary cutting blade 15 runs in the pile body in an all-round dead angle-free manner, the grouting (air) outlet is arranged on the core rod 10, the grouting (air) stirring blade 22 and the drill point are arranged between the three-wing stirring blade 22 and the grouting (air) pipe 9 and the drill point, and the air outlet are respectively arranged on the drill bit.
Working principle:
the device is moved to a pile position in a foundation through a travelling device 5, the power device 1 is started to drill to the depth of a designed pile bottom, in the process, three-wing stirring blades 22 cut soil bodies and stir in the horizontal direction, simultaneously under the counter force provided by a drill bit fixing wing 23, the conical gear 12 is meshed to drive a rotary cutting blade 15 to rotate in the vertical direction, the soil bodies are cut and stirred in the vertical direction, high-pressure gas is pumped into the soil bodies through a slurry pipe to form a gas explosion effect, and the soil bodies are stirred in an auxiliary mode, so that the soil bodies in the pile bodies are fully scattered and crushed; and (3) starting a slurry pump to spray slurry and lifting a stirring drill bit, fully and uniformly stirring cement slurry and soil under the interaction of the three-wing stirring blades 22 and the rotary-cut blades 15, lifting the drill bit to the designed pile top height, stopping spraying the slurry, drilling and stirring to the designed pile bottom depth again, and repeating the slurry spraying, stirring and lifting a drill rod to finish the construction of the cement stirring pile.
The device ensures the high efficiency and reliability of the stirring function by the mutual engagement between the conical gear 14 on the fixed wing 23 and the conical gear 12 on the rotary cutter shaft 16 in a mechanical connection mode; the rotation speed of the cutter shaft can be improved by changing the modulus ratio of the bevel gear and the rotation number of the drill rod, so that cement soil is effectively and high-speed stirred uniformly, the phenomena of sticking and stirring teeth of clay and the drill rod are overcome, the rotary cutting blades on the cutter shaft can effectively cut the soil, the process adaptability to different strata is greatly improved, the piling quality is ensured, and the design requirement is met.
The device is used for construction, the effect after construction is compared with that of the traditional process, and the result is shown in the following table:
through the comparison, the device is used for construction, and compared with other devices and methods for construction, the device has the following advantages:
1. the mechanical transmission is more advanced, and the reliability is high
The fixed wing in the stirring drill bit is meshed with the rotary cutter shaft fixed on the drill rod shell through the conical gear, and the stirring blades on the rotary cutter shaft are driven to rotate in the vertical direction under the reaction force of the fixed wing and the rotating force of the drill rod, meanwhile, the stirring blades revolve along with the core rod, the power of the stirring drill bit is provided by the pile driver, the rotating speed of the rotary cutter shaft (rotary cutter blade) can be changed through different rotating speeds of the pile driver, and the reliability is high.
2. Innovative stirring process for greatly improving pile forming quality
The counter-force wing, the vertical rotary-cut blade and the three-wing horizontal stirring blade of this device act together to realize the stirring function of three-dimensional cross, simultaneously, pump high-pressure gas into the stirring soil body through the trachea, play the gas explosion effect for soil body and curing agent (cement etc.) mix more evenly, are favorable to improving pile body intensity and integrality, promote into the stake quality by a wide margin.
3. Has stronger adaptability to different stratum
The device can fully crush soil bodies under the combined action of three-dimensional cross mixing and gas explosion, and is uniformly fused with curing agents (cement and the like), stirring is more effective, the problems that the soil bodies are large in viscosity and not easy to crush, the curing agents are unevenly mixed with the soil bodies and the like are solved, and the applicability to complex stratum is enhanced.
4. Greatly reduces engineering cost
Compared with the common high-pressure jet grouting process under the same working condition, the high-pressure jet grouting pile curing agent (cement and the like) has large mixing amount, the curing agent (cement and the like) of the device has small mixing amount, the construction cost is low, and the engineering cost can be obviously reduced.
Claims (5)
1. A self-reacting three-dimensional drill bit, characterized in that: the grouting device comprises a shell, a core rod, grouting (air) pipes, fixing wings, counterforce wings, rotary cutter shafts and stirring blades, wherein the fixing wings are arranged in the shell, the counterforce wings are arranged at the lower ends of the fixing wings, symmetrically extend out to the two sides of the fixing wings, conical gears are sleeved on the fixing wings, a plurality of groups of rotary cutter shafts are arranged on the wall of the shell, each group of rotary cutter shafts are oppositely arranged, adjacent rotary cutter shafts are positioned on different planes and staggered with each other, rotary cutter blades are arranged on the rotary cutter shafts, one ends of the rotary cutter shafts, which are positioned in the shell, are conical gears, are meshed with the conical gears sleeved outside the fixing wings, the core rod penetrates through the shell and the fixing wings from top to bottom and is connected with the fixing wings through bearings, the grouting (air) pipes are arranged in the core rod, the upper end of the shell is fixedly connected with the core rod, the lower end of the shell is connected with the fixing wings through bearings, drill tips are arranged at the bottom of the core rod, the stirring blades are connected with the near ends of the drill tips, grouting (air) outlets are arranged on the core rod between the drill tips and the stirring blades, and the grouting (air) pipes are connected with the grouting (air) outlets.
2. The self-reacting three-dimensional drill bit according to claim 1, wherein: the lateral length of the counterforce wings is larger than the diameter of the drill bit.
3. The self-reacting three-dimensional drill bit according to claim 1, wherein: the stirring blades are three-wing stirring blades, cross-shaped stirring blades, straight-line stirring blades or zigzag stirring blades.
4. The self-reacting three-dimensional drill bit according to claim 1, wherein: and an included angle is formed between the extension line of the three-wing stirring blade and the horizontal plane.
5. The self-reacting three-dimensional drill bit according to claim 1, wherein: the number ratio of the fixed wing to the bevel gear on the rotary cutter shaft is variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242915.9A CN117758737A (en) | 2023-09-25 | 2023-09-25 | Self-counterforce three-dimensional drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242915.9A CN117758737A (en) | 2023-09-25 | 2023-09-25 | Self-counterforce three-dimensional drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117758737A true CN117758737A (en) | 2024-03-26 |
Family
ID=90322424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311242915.9A Pending CN117758737A (en) | 2023-09-25 | 2023-09-25 | Self-counterforce three-dimensional drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117758737A (en) |
-
2023
- 2023-09-25 CN CN202311242915.9A patent/CN117758737A/en active Pending
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