CN110029664B - Single-shaft stirring drill bit with soil body adhesion elimination function - Google Patents
Single-shaft stirring drill bit with soil body adhesion elimination function Download PDFInfo
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- CN110029664B CN110029664B CN201910387169.XA CN201910387169A CN110029664B CN 110029664 B CN110029664 B CN 110029664B CN 201910387169 A CN201910387169 A CN 201910387169A CN 110029664 B CN110029664 B CN 110029664B
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- 238000003756 stirring Methods 0.000 title claims abstract description 185
- 239000002689 soil Substances 0.000 title claims abstract description 49
- 230000008030 elimination Effects 0.000 title claims abstract description 5
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000007704 transition Effects 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 17
- 238000010276 construction Methods 0.000 abstract description 10
- 239000002002 slurry Substances 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010348 incorporation Methods 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
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
Abstract
The invention discloses a single-shaft stirring drill bit with a soil body binding effect elimination function, which belongs to the field of pile foundation construction equipment and comprises a drill bit, stirring blades, primary re-stirring blades, secondary re-stirring blades, a conversion device, a vertical fixed connection device and a drill rod; the drill rod is a hollow cylindrical rod body, an internal thread is arranged on the inner side of the lower end of the drill rod, the drill rod is connected with the drill bit through threads, and the drill rod is connected with the stirring blade through welding; the switching device is connected with the drill rod through a buckle; the vertical fixed connection device is connected with the conversion device through bolts; the vertical fixed connection device comprises a horizontal blade, a U-shaped connecting rod and a high-strength fastening component. The invention effectively reduces the friction resistance when cutting soil, eliminates inclusion on the drill bit through the vertical fixed connecting device, ensures the cement doping amount and the mixing uniformity of cement paste and soil, and reduces the slurry returning amount.
Description
Technical Field
The invention belongs to the field of pile foundation construction equipment, and particularly relates to a single-shaft stirring drill bit with a soil body adhesion eliminating function.
Background
The deep cement-soil stirring pile is one method of reinforcing soft soil foundation with cement as curing agent, stirring and mixing soft soil and curing agent in deep ground via special stirring machine and slurry conveying pump, and hardening soft soil into composite foundation with high integrity, water stability and bearing capacity. The stirrer is provided with a core tube, and the head of the core tube is provided with blades. When the mixer rotates, cement slurry is sprayed out through the slurry spraying port at the end part of the core pipe and is mixed with the soil body which is loosened by the rotating blades, so that a cement reinforcing body is formed. The stirring head is an important part of the deep stirring machine, and directly influences the pile body uniformity of the deep stirring pile formed by mixing cement paste and soft soil, so as to determine the reinforcing effect of the foundation.
At present, in deep stirring construction, a remarkable problem is that soil body loosened around a stirring shaft rotates along with a stirring shaft instrument, so that cement paste sprayed from a spraying opening cannot be uniformly mixed with soft soil, and piling quality is affected. In order to improve the uniformity of stirring, the invention provides a single-shaft stirring drill bit with the function of eliminating soil body adhesion, which can effectively eliminate inclusion on the drill bit and ensure the mixing uniformity of cement doping amount and cement paste and soil.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a single-shaft stirring drill bit with the function of eliminating soil body adhesion, and overcomes the defects in the prior art. Through vertical fixed connection device, can effectually eliminate the inclusion on the drill bit to through optimizing the position of spout, guarantee cement incorporation, and cement paste and native misce bene.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a unipolar stirring drill bit with eliminate soil body bonding effect, its characterized in that: the device comprises a drill bit, a stirring blade, a primary re-stirring blade, a secondary re-stirring blade, a conversion device, a vertical fixed connection device and a drill rod; the drill rod is a hollow cylindrical rod body, an internal thread is arranged on the inner side of the lower end of the drill rod, the drill rod is connected with the drill bit through threads, and the drill rod is connected with the stirring blade through welding; the switching device is connected with the drill rod through a buckle; the vertical fixed connection device is connected with the conversion device through bolts;
the vertical fixed connection device comprises a horizontal blade, a U-shaped connecting rod and a high-strength fastening component.
The lengths of the stirring blade, the primary re-stirring blade and the secondary re-stirring blade are 50-200cm, the center distances among the stirring blade, the primary re-stirring blade and the secondary re-stirring blade are kept consistent, the interval range is 200-2000mm, and a supporting plate is arranged in the middle of the rear parts of the stirring blade, the primary re-stirring blade and the secondary re-stirring blade.
The support plate is of a triangle structure, the support plate is connected with the stirring blade, the primary re-stirring blade, the secondary re-stirring blade and the drill rod in a welding mode, the connection length range of the support plate and the stirring blade, the primary re-stirring blade and the secondary re-stirring blade is 1/3-3/4 of the length of the stirring blade, the primary re-stirring blade and the secondary re-stirring blade, and the connection length range between the support plate and the drill rod is 20-200mm.
The horizontal blade comprises an end blade and a main body blade, wherein the width of the end blade is 0.8-1.2 times of that of the horizontal connecting rod, the width of the main body blade is 2-4 times of that of the horizontal connecting rod, the thickness of the horizontal blade linearly increases from the end blade to the main body blade, the thickness of the horizontal blade, which is close to one end of a drill rod, is 0.2-5mm, the thickness of the horizontal blade, which is far away from one end of the drill rod, is 5-10 times of that of the end, which is close to the drill rod, the horizontal blade is made of a lower-strength metal material, the yield strength of the horizontal blade is 200-450MPa, and the Brinell hardness range of the horizontal blade is 80-130.
The U-shaped connecting rod comprises a horizontal connecting rod, a vertical connecting rod and a transition connecting rod, wherein the horizontal connecting rod, the vertical connecting rod and the transition connecting rod are made of hard alloy composite materials, and the transition connecting rod is of a circular arc structure.
The thickness of the horizontal connecting rod and the vertical connecting rod linearly decreases from the middle to the upper and lower ends, the middle thickness range is 10-100mm, and the thickness range of the upper and lower ends is 5-50mm; the length of the horizontal connecting rod is 1.01-1.5 times of that of the stirring blade, and the length of the vertical connecting rod is 0.2-0.8 times of the center distance between the stirring blade and the primary re-stirring blade; the width of the horizontal connecting rod is 1/10-1/4 of the center distance between the stirring blade and the primary re-stirring blade.
The high-strength reinforcement member is made of high-strength alloy material, the yield strength of the high-strength reinforcement member is more than 600MPa, and the Brinell hardness range is 250-400.
The lower part of the stirring blade is provided with evenly distributed drilling teeth, and the length of the drilling teeth is 3-30cm.
The middle part of the lower end of the drill bit is provided with a drill bit nozzle which is of a circular structure and has a diameter of 20-100mm.
A drill rod nozzle is arranged at the vertical line of the rear part of the center of the joint of the stirring blade and the drill rod, and the length range of the drill rod nozzle from the center of the joint of the stirring blade and the drill rod is 20-100mm.
The invention has the beneficial technical effects that:
(1) The stirring drill bit is provided with three layers of stirring blades, after the stirring blades at the lowest layer cut and turn over soil bodies, the stirring drill bit continues to drill down, and then the two layers of re-stirring blades at the upper part are driven by the drill rod to rotate at a high speed, so that the turned soil bodies are further stirred, the soil bodies are stirred more uniformly, and the pressure of an overlying soil layer is effectively reduced; (2) Through the vertical fixed connection device, inclusion on the drill bit can be effectively eliminated, the cement doping amount is ensured, and the mixing uniformity of cement paste and soil is ensured; (3) The thicknesses of the vertical connecting rod and the horizontal connecting rod are set to be linearly reduced from the middle to the upper end and the lower end, so that the friction resistance when cutting soil bodies is reduced; (4) The surrounding soil body is fully stirred through the double-shaft stirring drill bit, and the slurry can be more efficiently filled into the surrounding soil body by combining the drill rod nozzle behind the stirring blade, so that the slurry returning quantity is reduced.
Drawings
FIG. 1 is a front view of the overall structure of a single-shaft stirring drill bit with the function of eliminating soil body adhesion.
Fig. 2 is a front view of a vertical fixing and connecting device in a single-shaft stirring drill bit with the function of eliminating soil body adhesion.
Fig. 3 is a schematic structural view of a horizontal blade in a single-shaft stirring drill bit with the function of eliminating soil body adhesion.
FIG. 4 is a cross-sectional view of a horizontal blade in a single axis stirring bit of the present invention with soil binding elimination.
Fig. 5 is a schematic structural view of a U-shaped connecting rod in the single-shaft stirring drill bit with the function of eliminating soil body adhesion.
Fig. 6 is a top view of the construction of the switching device in the single shaft stirring drill bit with the function of eliminating soil body adhesion.
Fig. 7 is a schematic structural view of a stirring blade in a single-shaft stirring drill bit with the function of eliminating soil body adhesion.
Wherein, 1-bit; 2-stirring blades; 3-first-stage re-stirring blades; 4-two-stage re-stirring blades; 5-supporting plates; 6-a vertical fixed connection device; 7-converting means; 8-a drill rod nozzle; 9-a drill nozzle; 10-drilling teeth; 11-drill pipe; 12-a vertical connecting rod; 13-a transitional connecting rod; 14-a horizontal connecting rod; 61-horizontal blades; 62-U-shaped connecting rod; 63-high-strength reinforcement members.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
example 1:
performing a model pile stirring test on a mixed filling site, setting the depth of piles to be 5m, constructing by adopting a cement-soil stirring method, setting A, B groups of tests, and setting 3 test pieces in each group, wherein group A is an experimental group, and selecting the stirring drill bit introduced in the invention; the group B is a control group, adopts a stirring drill bit which is universal in the market, and has the following specific technology:
as shown in fig. 1 to 7, a single-shaft stirring drill bit with a function of eliminating soil body adhesion is characterized in that: the device comprises a drill bit 1, a stirring blade 2, a primary re-stirring blade 3, a secondary re-stirring blade 4, a conversion device 7, a vertical fixed connection device 6 and a drill rod 11; the drill rod 11 is a hollow cylindrical rod body, the inner side of the lower end of the drill rod 11 is provided with internal threads, the drill rod 7 is connected with the drill bit 1 through threads, and the drill rod 7 is connected with the stirring blade 2 through welding; the switching device 7 is connected with the drill rod 11 through a buckle; the vertical fixed connection device 6 is connected with the conversion device 7 through bolts;
the vertical fixing and connecting device 6 comprises a horizontal blade 61, a U-shaped connecting rod 62 and a high-strength fastening member 63.
The lengths of the stirring blades 2, the primary re-stirring blades 3 and the secondary re-stirring blades 4 are 50-200cm, the center distances between the stirring blades 2 and the primary re-stirring blades 3, between the primary re-stirring blades 3 and the secondary re-stirring blades 4 are kept consistent, the distance range is 200-2000mm, and a supporting plate 5 is arranged in the middle of the rear parts of the stirring blades 2, the primary re-stirring blades 3 and the secondary re-stirring blades 4.
The supporting plate 5 is of a triangle structure, the supporting plate 5 is connected with the stirring blade 2, the primary re-stirring blade 3, the secondary re-stirring blade 4 and the drill rod 11 in a welding mode, the connection length range of the supporting plate 5 and the stirring blade 2, the primary re-stirring blade 3 and the secondary re-stirring blade 4 is 1/3-3/4 of the length of the stirring blade 2, the primary re-stirring blade 3 and the secondary re-stirring blade 4, and the connection length range between the supporting plate 5 and the drill rod 11 is 20-200mm.
The horizontal blade 61 comprises an end blade and a main body blade, the width of the end blade is 0.8-1.2 times of the width of the horizontal connecting rod 14, the width of the main body blade is 2-4 times of the width of the horizontal connecting rod 14, the thickness of the horizontal blade 61 linearly increases from the end blade to the main body blade, the thickness of one end of the horizontal blade 61 close to the drill rod 11 is 0.2-5mm, the thickness of one end of the horizontal blade 61 far away from the drill rod 11 is 5-10 times of the thickness of one end of the horizontal blade 61 close to the drill rod 11, the horizontal blade 61 is made of a lower-strength metal material, the yield strength of the horizontal blade is 200-450MPa, and the Brinell hardness range of the horizontal blade is 80-130.
The U-shaped connecting rod 62 comprises a horizontal connecting rod 14, a vertical connecting rod 12 and a transition connecting rod 13, wherein the horizontal connecting rod 14, the vertical connecting rod 12 and the transition connecting rod 13 are made of hard alloy composite materials, and the transition connecting rod 13 is in a circular arc structure.
The thickness of the horizontal connecting rod 14 and the vertical connecting rod 12 is in a linear decreasing trend from the middle to the upper and lower ends, the middle thickness range is 10-100mm, the thickness range of the upper and lower ends is 5-50mm, the length of the horizontal connecting rod 14 is 1.01-1.5 times of that of the stirring blade 2, and the length of the vertical connecting rod 12 is 0.2-0.8 times of the center-to-center distance between the stirring blade 2 and the primary re-stirring blade 3. The width of the horizontal connecting rod 14 is 1/10-1/4 of the center distance between the stirring blade 2 and the primary re-stirring blade 3.
The high-strength reinforcing member 63 is a high-strength alloy material, and the yield strength of the high-strength reinforcing member is more than 600MPa, and the Brinell hardness range is 250-400.
The lower part of the stirring blade 2 is provided with evenly distributed drilling teeth 10, and the length of the drilling teeth 10 is 3-30cm.
The middle part of the lower end of the drill bit 1 is provided with a drill bit nozzle 9, the drill bit nozzle 9 is of a circular structure, and the diameter of the drill bit nozzle 9 is 20-100mm.
A drill rod nozzle 8 is arranged at the vertical line of the rear part of the center of the joint of the stirring blade 2 and the drill rod 11, and the length range of the drill rod nozzle 8 from the center of the joint of the stirring blade 2 and the drill rod 11 is 20-100mm.
The construction process of two stirring and two spraying is adopted, the average stirring resistance of the test pieces in the group A is 3/5 of that in the group B in the construction process, the average slurry returning amount of the test pieces in the group A is 1/4 of that in the group B, and after the pile is formed for 28d, the pile forming quality is inspected by excavation, and the result shows that the pile forming quality of the test pieces in the group A is good.
Example 2:
when a certain construction site is used for testing piles, one test pile is additionally arranged, the stirring drill bit is adopted by a plurality of additionally arranged test piles, the design rule is that the pile depth is 13m, and the construction is carried out by adopting a cement soil stirring method, wherein the soil layer of the site is as follows:
the specific technology is as follows:
as shown in fig. 1 to 7, a single-shaft stirring drill bit with a function of eliminating soil body adhesion is characterized in that: the device comprises a drill bit 1, a stirring blade 2, a primary re-stirring blade 3, a secondary re-stirring blade 4, a conversion device 7, a vertical fixed connection device 6 and a drill rod 11; the drill rod 11 is a hollow cylindrical rod body, the inner side of the lower end of the drill rod 11 is provided with internal threads, the drill rod 7 is connected with the drill bit 1 through threads, and the drill rod 7 is connected with the stirring blade 2 through welding; the switching device 7 is connected with the drill rod 11 through a buckle; the vertical fixed connection device 6 is connected with the conversion device 7 through bolts;
the vertical fixing and connecting device 6 comprises a horizontal blade 61, a U-shaped connecting rod 62 and a high-strength fastening member 63.
The lengths of the stirring blades 2, the primary re-stirring blades 3 and the secondary re-stirring blades 4 are 50-200cm, the center distances between the stirring blades 2 and the primary re-stirring blades 3, between the primary re-stirring blades 3 and the secondary re-stirring blades 4 are kept consistent, the distance range is 200-2000mm, and a supporting plate 5 is arranged in the middle of the rear parts of the stirring blades 2, the primary re-stirring blades 3 and the secondary re-stirring blades 4.
The supporting plate 5 is of a triangle structure, the supporting plate 5 is connected with the stirring blade 2, the primary re-stirring blade 3, the secondary re-stirring blade 4 and the drill rod 11 in a welding mode, the connection length range of the supporting plate 5 and the stirring blade 2, the primary re-stirring blade 3 and the secondary re-stirring blade 4 is 1/3-3/4 of the length of the stirring blade 2, the primary re-stirring blade 3 and the secondary re-stirring blade 4, and the connection length range between the supporting plate 5 and the drill rod 11 is 20-200mm.
The horizontal blade 61 comprises an end blade and a main body blade, the width of the end blade is 0.8-1.2 times of the width of the horizontal connecting rod 14, the width of the main body blade is 2-4 times of the width of the horizontal connecting rod 14, the thickness of the horizontal blade 61 linearly increases from the end blade to the main body blade, the thickness of one end of the horizontal blade 61 close to the drill rod 11 is 0.2-5mm, the thickness of one end of the horizontal blade 61 far away from the drill rod 11 is 5-10 times of the thickness of one end of the horizontal blade 61 close to the drill rod 11, the horizontal blade 61 is made of a lower-strength metal material, the yield strength of the horizontal blade is 200-450MPa, and the Brinell hardness range of the horizontal blade is 80-130.
The U-shaped connecting rod 62 comprises a horizontal connecting rod 14, a vertical connecting rod 12 and a transition connecting rod 13, wherein the horizontal connecting rod 14, the vertical connecting rod 12 and the transition connecting rod 13 are made of hard alloy composite materials, and the transition connecting rod 13 is in a circular arc structure.
The thickness of the horizontal connecting rod 14 and the vertical connecting rod 12 is in a linear decreasing trend from the middle to the upper and lower ends, the middle thickness range is 10-100mm, the thickness range of the upper and lower ends is 5-50mm, the length of the horizontal connecting rod 14 is 1.01-1.5 times of that of the stirring blade 2, and the length of the vertical connecting rod 12 is 0.2-0.8 times of the center-to-center distance between the stirring blade 2 and the primary re-stirring blade 3. The width of the horizontal connecting rod 14 is 1/10-1/4 of the center distance between the stirring blade 2 and the primary re-stirring blade 3.
The high-strength reinforcing member 63 is a high-strength alloy material, and the yield strength of the high-strength reinforcing member is more than 600MPa, and the Brinell hardness range is 250-400.
The lower part of the stirring blade 2 is provided with evenly distributed drilling teeth 10, and the length of the drilling teeth 10 is 3-30cm.
The middle part of the lower end of the drill bit 1 is provided with a drill bit nozzle 9, the drill bit nozzle 9 is of a circular structure, and the diameter of the drill bit nozzle 9 is 20-100mm.
A drill rod nozzle 8 is arranged at the vertical line of the rear part of the center of the joint of the stirring blade 2 and the drill rod 11, and the length range of the drill rod nozzle 8 from the center of the joint of the stirring blade 2 and the drill rod 11 is 20-100mm.
The construction process of two stirring and two spraying is adopted, the average stirring resistance of the test pile with the stirring drill bit in the construction process is 3/5 of that of the conventional stirring drill bit test pile, and the average slurry return amount is reduced by 1/3 compared with that of the conventional stirring drill bit test pile.
The single-shaft stirring drill bit has the advantages that the single-shaft stirring drill bit can eliminate the soil body binding effect, and the pressure of an overlying soil layer and the friction resistance when cutting soil bodies are effectively reduced; the problem that cement paste sprayed from a guniting port cannot be uniformly mixed with soft soil and the pile forming quality is affected due to the fact that soil body which is loosened around a stirring shaft rotates along with a stirring shaft instrument is solved, the inclusion on a drill rod and a blade is eliminated through a vertical fixed connection device, the cement doping amount and the mixing uniformity of cement paste and soil are guaranteed, and the paste returning rate is reduced.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that other variations, modifications, additions and substitutions are possible, without departing from the scope of the invention as disclosed in the accompanying claims.
Claims (5)
1. A unipolar stirring drill bit with eliminate soil body bonding effect, its characterized in that: the device comprises a drill bit, a stirring blade, a primary re-stirring blade, a secondary re-stirring blade, a conversion device, a vertical fixed connection device and a drill rod; the drill rod is a hollow cylindrical rod body, an internal thread is arranged on the inner side of the lower end of the drill rod, the drill rod is connected with the drill bit through threads, and the drill rod is connected with the stirring blade through welding; the switching device is connected with the drill rod through a buckle; the vertical fixed connection device is connected with the conversion device through bolts;
the vertical fixed connection device comprises a horizontal blade, a U-shaped connecting rod and a high-strength fastening component;
the horizontal blade comprises an end blade and a main body blade, the width of the end blade is 0.8-1.2 times of the width of the horizontal connecting rod, the width of the main body blade is 2-4 times of the width of the horizontal connecting rod, the thickness of the horizontal blade linearly increases from the end blade to the main body blade, the thickness of the horizontal blade, which is close to one end of a drill rod, is 0.2-5mm, the thickness of the horizontal blade, which is far from one end of the drill rod, is 5-10 times of the thickness, which is close to one end of the drill rod, the horizontal blade is made of a lower-strength metal material, the yield strength of the horizontal blade is 200-450MPa, and the Brinell hardness range of the horizontal blade is 80-130;
the U-shaped connecting rod comprises a horizontal connecting rod, a vertical connecting rod and a transition connecting rod, wherein the horizontal connecting rod, the vertical connecting rod and the transition connecting rod are made of hard alloy composite materials, and the transition connecting rod is in a circular arc structure;
the thickness of the horizontal connecting rod and the vertical connecting rod is in a linear decreasing trend from the middle to the upper and lower ends, the middle thickness range is 10-100mm, and the thickness range of the upper and lower ends is 5-50mm; the length of the horizontal connecting rod is 1.01-1.5 times of that of the stirring blade, and the length of the vertical connecting rod is 0.2-0.8 times of the center distance between the stirring blade and the primary re-stirring blade; the width of the horizontal connecting rod is 1/10-1/4 of the center distance between the stirring blade and the primary re-stirring blade;
the middle part of the lower end of the drill bit is provided with a drill bit nozzle which is of a circular structure and has a diameter of 20-100mm;
a drill rod nozzle is arranged at the vertical line at the rear part of the center of the joint of the stirring blade and the drill rod, and the length range of the drill rod nozzle from the center of the joint of the stirring blade and the drill rod is 20-100mm.
2. The uniaxial stirring drill with the function of eliminating soil body adhesion according to claim 1, wherein: the lengths of the stirring blade, the primary re-stirring blade and the secondary re-stirring blade are 50-200cm, the center distances among the stirring blade, the primary re-stirring blade and the secondary re-stirring blade are kept consistent, the interval range is 200-2000mm, and a supporting plate is arranged in the middle of the rear parts of the stirring blade, the primary re-stirring blade and the secondary re-stirring blade.
3. A single-shaft stirring drill bit with soil body binding elimination function according to claim 2, wherein: the support plate is of a triangle structure, the support plate is connected with the stirring blade, the primary re-stirring blade, the secondary re-stirring blade and the drill rod in a welding mode, the connection length range of the support plate and the stirring blade, the primary re-stirring blade and the secondary re-stirring blade is 1/3-3/4 of the length of the stirring blade, the primary re-stirring blade and the secondary re-stirring blade, and the connection length range between the support plate and the drill rod is 20-200mm.
4. The uniaxial stirring drill with the function of eliminating soil body adhesion according to claim 1, wherein: the high-strength reinforcing component is made of high-strength alloy material, the yield strength of the high-strength reinforcing component is more than 600MPa, and the Brinell hardness is in the range of 250-400.
5. The uniaxial stirring drill with the function of eliminating soil body adhesion according to claim 1, wherein: the lower part of the stirring blade is provided with evenly distributed drilling teeth, and the length of the drilling teeth is 3-30cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910387169.XA CN110029664B (en) | 2019-05-10 | 2019-05-10 | Single-shaft stirring drill bit with soil body adhesion elimination function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910387169.XA CN110029664B (en) | 2019-05-10 | 2019-05-10 | Single-shaft stirring drill bit with soil body adhesion elimination function |
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| CN110029664A CN110029664A (en) | 2019-07-19 |
| CN110029664B true CN110029664B (en) | 2023-12-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110258544A (en) * | 2019-07-26 | 2019-09-20 | 北京中岩大地科技股份有限公司 | The stirring drill bit of deep-layer stirring is realized based on drop resistance mode |
| CN110374097A (en) * | 2019-07-26 | 2019-10-25 | 北京中岩大地科技股份有限公司 | The construction method for improving bearing capacity of pile foundation is stirred based on major diameter |
| CN110306545A (en) * | 2019-07-26 | 2019-10-08 | 北京中岩大地科技股份有限公司 | A kind of uniaxial stirring drill bit that multidirectional stirring can be achieved |
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| Publication number | Priority date | Publication date | Assignee | Title |
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