CN108590533B - Drill bit for construction of bored pile - Google Patents
Drill bit for construction of bored pile Download PDFInfo
- Publication number
- CN108590533B CN108590533B CN201810665621.XA CN201810665621A CN108590533B CN 108590533 B CN108590533 B CN 108590533B CN 201810665621 A CN201810665621 A CN 201810665621A CN 108590533 B CN108590533 B CN 108590533B
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- China
- Prior art keywords
- drill
- connecting plate
- scrapers
- drill bit
- bottom end
- Prior art date
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- 238000010276 construction Methods 0.000 title claims description 6
- 238000007790 scraping Methods 0.000 claims abstract description 42
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 239000002893 slag Substances 0.000 claims description 14
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 22
- 239000002689 soil Substances 0.000 abstract description 22
- 230000036346 tooth eruption Effects 0.000 description 8
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a drill bit for constructing a bored pile, which comprises a hollow foundation rod, a connecting part, a check ring, a connecting plate, a plurality of first scrapers, a plurality of connecting plates and a plurality of first scrapers, wherein the connecting part is arranged at the top end of the hollow foundation rod and is used for being connected with a drill rod of a drilling machine; the connecting plate of each connecting check ring and the first scraping plate of each connecting check ring on the same plumb line are an integral connecting plate and a first scraping plate; the end face of the bottom of the retainer ring is provided with a plurality of cutting picks. The drill bit has good verticality of hole forming when drilling holes on slope rocks at the interface of soil layers and soft strata.
Description
Technical Field
The invention relates to the technical field of pile foundation construction, in particular to a drill bit for constructing a bored pile.
Background
The bored pile has the advantages of high bearing capacity, strong adaptability, hundreds of meters long pile length, capacity of reducing the number of piles and the like, and has become a preferred foundation form of buildings or structures at home and abroad, particularly large-scale buildings or structures such as bridges, oil tanks, liquefied natural gas tanks and nuclear power stations. The main construction process of the concrete bored pile comprises the following steps: pore-forming, slag removal, steel reinforcement cage discharging, concrete filling and detection. In the main construction process, pore forming is a key link and directly influences pile forming quality. Whereas prior art hole-forming drills generally employ the following structure: including hollow foundation pole, establish the toper drill point in hollow foundation pole lower extreme, establish retaining ring in the outside, connect the polylith connecting plate on retaining ring and hollow foundation pole upper portion and connect the scraper blade that the retaining ring becomes sharp with the polylith outside of hollow foundation pole bottom, be equipped with a plurality of alloy cutting tooth on drill point and the polylith scraper blade, hollow foundation pole top is equipped with the connecting portion that is used for being connected with the drilling rod of rig. The drill bit for constructing the bored pile in the prior art has the following defects: 1. because soil body distribution is layered, the hardness of the soil layer is higher, even the soil layer is required to drill soft rock stratum, and most of the soil layer boundary line or interface is inclined, thus, in the drilling process, when drilling from softer soil layer to harder soil layer or soft rock stratum, the drill bit in the prior art can only rely on the drill point of the center to position, the conical drill point of the drill bit is firstly contacted with hard soil or soft rock and is in point contact, the straight-edge inclined structure of the scraping plate is not obvious in assistance of aligning center and positioning, the retainer ring only plays a role of passive blocking mud, and has no great effect on aligning center and positioning, so that the phenomena of drill bit deviation, drill bit slipping and the like easily occur when drilling from the inclined boundary surface to hard soil layer or soft rock stratum, and the verticality of the hole forming of the bored pile is seriously influenced. 2. When drilling, mud circulation is needed, especially when reverse circulation is needed, slag is discharged from the bottom of the hole by virtue of the hollow foundation rod, and the drill point in the prior art is positioned under the foundation rod, so that the blocking effect on mud is realized, the slag discharge is unsmooth, the drilling speed is reduced and the service life of the drill bit is shortened due to untimely discharge of the drill slag. 3. The connecting plate and the scraping plate of the prior art drill bit are respectively consumable or respectively slightly thin.
Disclosure of Invention
The invention aims to solve the technical problem of providing a drill bit for constructing a bored pile, which has the advantages of good drilling verticality, smooth slag discharge and high drilling speed.
The technical scheme is that the drill bit for constructing the bored pile comprises a hollow foundation rod, a connecting part, a retaining ring, a connecting plate and a first scraping plate, wherein the connecting part is arranged at the top end of the hollow foundation rod and is used for being connected with a drill rod of a drilling machine, the retaining ring is concentric with the hollow foundation rod, the connecting plate is connected with the retaining ring, the retaining ring is connected with the retaining ring, the first scraping plate is provided with cutting teeth, a concentric guiding drill sleeve is arranged on the outer side of the hollow foundation rod, a plurality of cutting teeth are arranged on the bottom end face of the guiding drill sleeve in a circumferential manner, the guiding drill sleeve axially extends below the bottom end face of the hollow foundation rod, a plurality of second scraping plates are arranged between the guiding drill sleeve and the hollow foundation rod, and the cutting teeth are respectively arranged on the bottom faces of at least two second scraping plates.
After adopting the structure, the invention has the following advantages: because the concentric guiding drill sleeve is connected with the hollow foundation rod, the bottom end surface of the guiding drill sleeve is a plane and is provided with a plurality of cutting teeth along the circumference, the traditional drill point is actually replaced by a flat annular surface, namely the guiding drill sleeve is used for replacing the drill point, when the guiding drill sleeve is used for drilling down to a soft and hard soil layer interface or a soil layer and soft rock layer interface, the end part of the drilling rod is in surface contact with an inclined hard soil layer or a soft rock layer rather than point contact, the phenomena of drill bit deviation, drill bit slipping and the like are avoided, and the verticality of a drilling hole, namely a hole forming, is effectively ensured. Still because direction drill bushing is direct vertical intercommunication with the cavity drilling rod, can not exist the drill point and shelter from the phenomenon under the basic pole like prior art, the drill slag at hole bottom directly discharges smoothly through direction drill bushing and cavity basic pole, and this just has avoided the drill slag to block up, has ensured the life of boring efficiency and drill bit. Because there are a plurality of second scrapers and at least two of them bottom surfaces to have a plurality of picks between direction drill bushing and the cavity foundation pole, the second scraper blade that stirs the soil body has still been increased to the inside of direction drill bushing and the pick that cuts broken rock promptly, and like this, when this drill bit is gone down to bore, the columnar soil body that forms in the direction drill bushing can be broken in time by the second scraper blade, further avoids the drilling slag to block up, improves drilling efficiency.
Further, the outer diameter of the guiding drill sleeve is 3-4 times of the outer diameter of the hollow foundation rod. After the structure is adopted, the guiding drill bushing maintains a sufficient guiding centering annular area, a cutting drilling annular area and a slag discharging and broken stone cutting area in the guiding drill bushing, even if the inclined soft rock layer at the interface is encountered, the guiding drill bushing maintains a sufficient annular cutting area, the inclined soft rock can be accurately drilled by the annular cutting of the drill bushing, a plurality of cutting picks are arranged on the bottom surface of the second scraping plate in the guiding drill bushing until the inclined soft rock is drilled, the phenomena of drill bit deviation, drill bit slipping and the like are avoided, and the verticality of the hole forming, the smoothness of slag discharging, the rock breaking drilling speed and the rock breaking drilling efficiency are further improved.
Further, the bottom end of the guiding drill sleeve is provided with at least two axial arc-shaped openings which are symmetrically arranged and used for mud to pass through. After the structure is adopted, the process of sucking mud by the drill rod is ensured to be smoother, the reverse circulation is ensured to be smooth, and the drilling efficiency and the service life of the drill bit are further improved.
Further, the second scrapers are four, are evenly and symmetrically arranged along the outer circumference of the hollow foundation rod, the bottom end faces of the second scrapers are all horizontal planes, and a plurality of cutting picks are respectively arranged on the bottom end faces of the two second scrapers far away from the axial arc-shaped opening. After the structure is adopted, the strength and the strength of the second scraping plate are larger, the working stability of the second scraping plate is strong, and the drilling speed and the drilling efficiency can be further improved.
Further, the bottom end face of the retainer ring is provided with a plurality of cutting picks. After the structure is adopted, the beneficial effects of the invention are more remarkable: when drilling, except that the drill point part, namely the small ring surface at the bottom of the guiding drill sleeve, is contacted with the inclined soil layer or the soft rock layer, the retainer ring is not a negative blocking structure in the prior art any more, but is used as an auxiliary structure for aligning the center of the drilling hole, and the large ring surface at the bottom of the retainer ring is in surface contact with the soft and hard soil layer or the soft rock layer interface, so that the small ring surface of the lower guiding drill sleeve and the large ring surface of the upper retainer ring are combined with each other to form double-layer guiding during drilling, the verticality during drilling is further enhanced, the phenomena of drill bit deflection, drill bit slipping and the like are further avoided, and the technical effects of aligning the center of a circle and guaranteeing the verticality of a hole are very obvious.
Further, the connecting plate of each connecting check ring and the first scraping plate of each connecting check ring on the same plumb line form an integral connecting plate and a first scraping plate, the outer sides of the connecting plate and the first scraping plate are fixed with the check ring, the inner sides of the connecting plate and the first scraping plate are fixed with the guiding drill sleeve, the connecting plate and the first scraping plate extend outwards from the guiding drill sleeve, extend upwards, extend outwards and extend outwards obliquely again, so as to form a concave area of the connecting plate and the first scraping plate, and cutting teeth are arranged on each extending surface. The structure above makes the cutting teeth on the connecting plate and the first scraper plate shrink inwards to generate time difference, so that the layered drill-down of the guiding drill bushing, the retainer ring, the connecting plate and the first scraper plate is realized, that is, on the inclined hard soil layer or soft rock layer interface, the teeth of the guiding drill bushing are firstly small-ring-surface cutting drill-down positioning, then the teeth of the retainer ring are large-ring-surface cutting drill-down positioning, and finally the teeth of the connecting plate and the first scraper plate follow most soil between the cutting crushing guiding drill bushing and the retainer ring under the premise of ensuring vertical drill-down positioning in upper and lower double-layer positioning, so that drill-down crushing efficiency is improved. The three-layer progressive crushing is realized, the guide drill sleeve, the check ring and the scraping plate are combined with each other, the cutting area, the crushing efficiency and the drilling speed are improved, the verticality of the drilling hole is completely ensured, and the technical problem that the verticality of the slope drilling at the interface between the soft soil layer and the hard soil layer or between the soil layer and the soft rock layer, which is not solved so far but puzzled by the skilled man, cannot be ensured is properly solved. The verticality of the hole, the integrity of the hole, the convenience and smoothness of slag discharge, and the rock breaking drilling speed and efficiency are ideal. And the connecting plate and the first scraping plate are integrated, so that the material cost is not increased additionally, and the strength of the connecting plate and the first scraping plate, the working stability and the drilling speed efficiency are further improved.
Further, the bottom surfaces of the connecting plate and the first scraping plate are sequentially provided with a horizontal side, a vertical side, an upward inclined side which is inclined by 35-45 degrees and an upward inclined side which is inclined by 5-10 degrees from the guiding drill sleeve, and the four sides are all provided with cutting picks. After the structure is adopted, the guide drill bushing breaks rock in advance and drills in a centering way, the cutting pick of the retainer ring follows the break rock and drills in a centering way, the diameter of the reamed hole is only the width of the horizontal plane at the bottommost end by the connecting plate and the cutting pick at the bottom surface of the first scraping plate, the axial drilling depth and speed are mainly accelerated along the vertical plane, the diameter ring of the reamed hole is gradually enlarged along the inclined edge which is inclined upwards by 35-45 degrees and the inclined edge which is inclined upwards by 5-10 degrees, and particularly, the inclined hard soil layer or the inclined soft rock layer which meet the interface can further ensure the technical effects of the centering circle center and the perpendicularity of the hole forming. The cutting angle, the cutting force, the cutting speed and the cutting efficiency are very ideal, and the verticality of the hole forming, the convenient smoothness of slag discharging and the rock breaking drilling speed and efficiency are further improved.
Further, the number of the connecting plates and the number of the first scraping plates are four, and the connecting plates and the first scraping plates are uniformly and symmetrically arranged along the outer circumference of the guide drill sleeve. After the structure is adopted, the strength and the strength of the connecting plate, the first scraping plate and the whole drill bit are larger, the working stability is strong, and the drilling speed and the drilling efficiency are further improved.
Drawings
Fig. 1 is a schematic perspective view of a drill bit of the present invention with cutting picks omitted.
Fig. 2 is a schematic perspective view of the whole structure of the drill bit with cutting pick according to the present invention.
FIG. 3 is a schematic cross-sectional elevation view of the entire bit of the present invention.
Fig. 4 is a schematic view of the entire bottom view of the drill bit of the present invention.
The cutting tool comprises a first scraper, a retainer ring, a connecting plate, a first scraper, a guide drill sleeve, a hollow foundation rod, a second scraper, an axial arc-shaped opening, cutting teeth, a connecting portion and a connecting portion, wherein the retainer ring, the connecting plate and the first scraper are shown in the figure, the guide drill sleeve, the hollow foundation rod, the second scraper and the connecting portion are shown as 1, the retainer ring, the connecting plate and the connecting portion, and the hollow foundation rod, the second scraper and the connecting portion are shown as 5, the axial arc-shaped opening, the cutting teeth and the connecting portion are shown as 7.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. It should be noted that these embodiments are described herein for aiding in the understanding of the present invention, but are not to be construed as limiting the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, 2, 3 and 4
The drill bit for constructing the bored pile comprises a hollow foundation rod 4, wherein the top end of the hollow foundation rod 4 is provided with a connecting part 8 such as a flange for connecting with a drill rod of a drilling machine.
The outside of the hollow foundation rod 4 is provided with a concentric guiding drill sleeve 3, and the outer diameter of the guiding drill sleeve 3 is 3-4 times of the outer diameter of the hollow foundation rod 4. The 3 bottom end face of the pilot drill sleeve is a plane and is provided with a plurality of cutting picks 7 along the circumference. The pilot drill sleeve 3 extends axially below the bottom end face of the hollow base rod 4. The bottom end of the guiding drill sleeve 3 is provided with at least two axial arc-shaped openings 6 which are symmetrically arranged and used for mud to pass through. A plurality of second scrapers 5 are arranged between the guiding drill bushing 3 and the hollow foundation rod 4, and the second scrapers 5 can be regarded as a double-connecting plate. The blocks are preferably four blocks as shown in the figure, and four second scrapers 5 are uniformly and symmetrically arranged along the outer circumference of the hollow foundation rod 4. Wherein the bottom end surfaces of at least two second blades 5 each have a plurality of picks 7. The bottom end surfaces of the second scraping plates 5 are all plane surfaces, and can be horizontal surfaces. The bottom end surfaces of the two second scrapers 5 far from the axial arc-shaped opening 6 are respectively provided with a plurality of cutting picks 7. In other words, the bottom end surfaces of the two second scrapers 5 near the axial arc-shaped opening 6 are not provided with picks 7 to facilitate slag discharge, i.e., mud passage.
The drill bit for constructing the bored pile further comprises a retainer ring 1 concentric with the hollow foundation rod 4, and a plurality of cutting picks 7 are arranged on the bottom end face of the retainer ring 1. The first scraping plate is provided with a cutting pick 7, and further comprises a plurality of connecting plates connected with the check rings 1 and a plurality of first scraping plates connected with the check rings 1. The connecting plate of each connecting check ring 1 and the first scraping plate of each connecting check ring 1 on the same plumb line form an integral connecting plate and a first scraping plate 2, the outer side of the integral connecting plate and the outer side of the integral first scraping plate 2 are fixed with the check ring 1, and the inner side of the integral connecting plate and the first scraping plate are fixed with the guiding drill sleeve 3. The connecting plate and the first scraping plate 2 extend outwards, upwards, outwards and upwards obliquely and outwards from the guiding drill sleeve 3 so as to form a concave area of the connecting plate and the first scraping plate 2, and cutting picks 7 are arranged on each extending surface. The bottom surfaces of the connecting plate and the first scraping plate 2 are sequentially provided with a horizontal side, a vertical side, an upward inclined side which is inclined by 35-45 degrees and an upward inclined side which is inclined by 5-10 degrees from the guiding drill sleeve 3, and the four sides are all provided with cutting picks 7. The number of the connecting plates and the first scraping plates 2 is preferably four, the connecting plates and the first scraping plates 2 are uniformly and symmetrically arranged along the outer circumference of the guiding drill sleeve 3, and each second scraping plate 5 and each corresponding connecting plate and each corresponding first scraping plate 2 are on the same plane. As can be seen from fig. 4, the four second scrapers 5, the four connecting plates and the first scraper 2 are uniformly and correspondingly on the same plane, the 1 st and the 3 rd of the four second scrapers are on the same diameter line of a circle, the 2 nd and the 4 th of the four second scrapers are on the other same diameter line of the circle, and all included angles of the two diameter lines are 90 degrees.
The cutter body of the cutting pick 7 can be made of low alloy structural steel, and the cutter head is made of hard alloy.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a drill bit that construction drilling bored concrete pile used, includes connecting portion (8) that are used for being connected with the drilling rod of rig on cavity foundation pole (4), cavity foundation pole (4) top, with cavity foundation pole (4) concentric retaining ring (1), connecting plate and the polylith of connecting retaining ring (1) and the polylith are connected the retaining ring and are equipped with the first scraper blade of pick (7), the outside of cavity foundation pole (4) has concentric direction drill bushing (3), and the bottom end face of direction drill bushing (3) is the plane and is equipped with a plurality of picks (7) along the circumference, its characterized in that: the guiding drill sleeve (3) axially extends out of the lower part of the bottom end surface of the hollow foundation rod (4), a plurality of second scrapers (5) are arranged between the guiding drill sleeve (3) and the hollow foundation rod (4), and a plurality of cutting picks (7) are respectively arranged on the bottom surfaces of at least two second scrapers (5);
the outer diameter of the guide drill sleeve (3) is 3-4 times that of the hollow foundation rod (4);
The bottom end of the guide drill sleeve (3) is provided with at least two axial arc-shaped openings (6) which are symmetrically arranged and allow mud to pass through;
the bottom end surfaces of the two second scrapers (5) close to the axial arc-shaped opening (6) are not provided with picks (7) so as to be more beneficial to slag discharge;
The connecting plate of every connection retaining ring (1) and the first scraper blade of every connection retaining ring on same plumb line constitute monolithic connecting plate and first scraper blade (2), the outside of connecting plate and first scraper blade (2) is fixed with retaining ring (1), and the inboard is fixed with direction drill bushing (3), connecting plate and first scraper blade (2) are from direction drill bushing (3), extend outward earlier, upwards extend again, outwards upwards slant extend again, outwards extend again to constitute the indent region of connecting plate and first scraper blade (2), each extension face all has pick (7).
2. A drill bit for constructing a bored pile according to claim 1, wherein: the second scrapers (5) are four, are uniformly and symmetrically arranged along the outer circumference of the hollow foundation rod (4), the bottom end surfaces of the second scrapers (5) are all planes, and a plurality of cutting picks (7) are respectively arranged on the bottom end surfaces of the two second scrapers (5) which are far away from the axial arc-shaped opening (6).
3. A drill bit for constructing a bored pile according to claim 1, wherein: the bottom end face of the retainer ring (1) is provided with a plurality of cutting picks (7).
4. A drill bit for constructing a bored pile according to claim 1, wherein: the bottom surfaces of the connecting plate and the first scraping plate (2) are sequentially provided with a horizontal side, a vertical side, an upward inclined side which is inclined by 35-45 degrees and an upward inclined side which is inclined by 5-10 degrees from the guide drill sleeve (3), and the four sides are all provided with cutting picks (7).
5. A drill bit for constructing a bored pile according to claim 1, wherein: the number of the connecting plates and the number of the first scraping plates (2) is four, and the connecting plates and the first scraping plates are uniformly and symmetrically arranged along the outer circumference of the guide drill sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810665621.XA CN108590533B (en) | 2018-06-26 | 2018-06-26 | Drill bit for construction of bored pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810665621.XA CN108590533B (en) | 2018-06-26 | 2018-06-26 | Drill bit for construction of bored pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108590533A CN108590533A (en) | 2018-09-28 |
| CN108590533B true CN108590533B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810665621.XA Active CN108590533B (en) | 2018-06-26 | 2018-06-26 | Drill bit for construction of bored pile |
Country Status (1)
| Country | Link |
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| CN (1) | CN108590533B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111155935B (en) * | 2020-01-21 | 2022-02-15 | 浙江乔兴建设集团有限公司 | Drilling device for liquefying saturated soil |
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| CN104747088A (en) * | 2015-03-31 | 2015-07-01 | 浙江禹建建设集团有限公司 | Single-waist multi-leaf hose bit for bored pile and drilling construction method thereof |
| CN205154032U (en) * | 2015-11-06 | 2016-04-13 | 宁波易通建设有限公司 | A drill bit for constructing concrete drilling bored concrete pile |
| CN205154025U (en) * | 2015-11-06 | 2016-04-13 | 宁波易通建设有限公司 | Drill bit that construction drilling bored concrete pile was used |
| CN205778552U (en) * | 2016-07-11 | 2016-12-07 | 三峡大学 | The most controlled a kind of bore expanded hole reducing Drillhole stake drill bit |
| CN206860103U (en) * | 2017-05-31 | 2018-01-09 | 中建八局浙江建设有限公司 | Rotary drilling machine drill bit |
| CN107747475A (en) * | 2017-10-09 | 2018-03-02 | 中交隧道工程局有限公司 | A kind of jet reverse circulation drill bit |
| CN207245622U (en) * | 2017-08-27 | 2018-04-17 | 常州市基础工程公司 | A kind of cast-in-situ bored pile drill bit |
| CN208330193U (en) * | 2018-06-26 | 2019-01-04 | 浙江易通基础工程有限公司 | The drill bit of construction drill bored concrete pile |
-
2018
- 2018-06-26 CN CN201810665621.XA patent/CN108590533B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011021466A (en) * | 2009-06-15 | 2011-02-03 | Heitaro Fukuda | Drill head for rock bed |
| CN104747088A (en) * | 2015-03-31 | 2015-07-01 | 浙江禹建建设集团有限公司 | Single-waist multi-leaf hose bit for bored pile and drilling construction method thereof |
| CN205154032U (en) * | 2015-11-06 | 2016-04-13 | 宁波易通建设有限公司 | A drill bit for constructing concrete drilling bored concrete pile |
| CN205154025U (en) * | 2015-11-06 | 2016-04-13 | 宁波易通建设有限公司 | Drill bit that construction drilling bored concrete pile was used |
| CN205778552U (en) * | 2016-07-11 | 2016-12-07 | 三峡大学 | The most controlled a kind of bore expanded hole reducing Drillhole stake drill bit |
| CN206860103U (en) * | 2017-05-31 | 2018-01-09 | 中建八局浙江建设有限公司 | Rotary drilling machine drill bit |
| CN207245622U (en) * | 2017-08-27 | 2018-04-17 | 常州市基础工程公司 | A kind of cast-in-situ bored pile drill bit |
| CN107747475A (en) * | 2017-10-09 | 2018-03-02 | 中交隧道工程局有限公司 | A kind of jet reverse circulation drill bit |
| CN208330193U (en) * | 2018-06-26 | 2019-01-04 | 浙江易通基础工程有限公司 | The drill bit of construction drill bored concrete pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108590533A (en) | 2018-09-28 |
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