CN208578508U - A kind of single shaft cement mixing method drill bit - Google Patents
A kind of single shaft cement mixing method drill bit Download PDFInfo
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- CN208578508U CN208578508U CN201821328450.3U CN201821328450U CN208578508U CN 208578508 U CN208578508 U CN 208578508U CN 201821328450 U CN201821328450 U CN 201821328450U CN 208578508 U CN208578508 U CN 208578508U
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Abstract
A kind of uniaxial cement mixing method drill bit disclosed in the utility model, including connector, for being connected with the drilling rod of the uniaxial cement-soil mixing pile machine；Auger spindle, the upper end are connected with the connector；Three-level cutterhead, along being arranged radially for the auger spindle, radius of clean-up is pile radius；Second level cutterhead, along the lower section of the auger spindle being arranged radially and be located at the three-level cutterhead, radius of clean-up is less than the radius of clean-up of the three-level cutterhead；Down-hole hammer is set to the lower end of the auger spindle, including down-hole hammer impactor and down-the-hold drill bit.When above-mentioned single shaft cement mixing method bit operation, first pass through down-the-hold drill bit rotary drilling cutting, when meeting hard stratum or lump in sinking drilling process, down-hole hammer impactor is able to drive down-the-hold drill bit axial vibration impact and advances, it not only can reduce resistance when drilling cutting, and second level cutterhead and three-level cutterhead stress can be made more balanced, the probability of deflected file is greatly reduced, to overlap between adjacent studs more completely.
Description
Technical field
The utility model relates to deep mixing technique field more particularly to a kind of uniaxial cement mixing method drill bits.
Background technique
Cement mixing method using more, using cement grout as curing agent, utilizes mixing pile machine-cut in Soft Soil Layer
The soil body is cut, while injecting cement grout in drilling machine front end low pressure, so that cement and the soil body of chopping is thoroughly mixed to form hard and stops
Aqueous higher cement earth pile.Cement-soil mixing pile machine is broadly divided into uniaxial, twin shaft and triaxial cement by construction equipment
Mixing pile machine, in general, twin shaft and triaxial cement mixing pile machine take up a large area, uniaxial cement-soil mixing pile machine occupied area
It is small, therefore in the municipal works such as the rain sewage pipeline construction shaft of business district or narrow field, uniaxial cement-soil mixing pile machine
Applicability it is stronger.
But usually there are adjacent studs and overlap incomplete problem in current uniaxial cement mixing method in construction,
Leak, quicksand phenomenon easily occurs, traces it to its cause mainly uniaxial cement mixing method drill bit in drilling, is especially encountering pan soil
When layer region, the easy run-off the straight of drill bit deflects towards the side that stake position is mutually engaged, only because actually stirring region is native for engagement region
Matter is softer, and the more deep this inclination of drill bit subsidence position is just more obvious, and so as to cause deflected file, adjacent studs overlap joint is not complete enough.
Therefore the problem of being easy to happen inclination when uniaxial cement mixing method drill bit drilling adjacent studs, is the technology of this field
Personnel's problem to be solved.
Utility model content
The purpose of the utility model is to provide a kind of uniaxial cement mixing method drill bit, a position is not susceptible to deviate, phase
Adjacent stake overlap joint is more complete.
In order to achieve the above objectives, the utility model the following technical schemes are provided:
A kind of single shaft cement mixing method drill bit, comprising:
Connector, for being connected with the drilling rod of the uniaxial cement-soil mixing pile machine；
Auger spindle, the upper end are connected with the connector；
Three-level cutterhead, along being arranged radially for the auger spindle, radius of clean-up is pile radius；
Second level cutterhead, along the lower section of the auger spindle being arranged radially and be located at the three-level cutterhead, radius of clean-up is less than
The radius of clean-up of the three-level cutterhead；
Down-hole hammer is set to the lower end of the auger spindle, including down-hole hammer impactor and down-the-hold drill bit.
Preferably, the outside bite of the down-the-hold drill bit, the second level cutterhead and the three-level cutterhead three is formed
Cutting face is in inverted conical shape on the whole.
Preferably, the second level cutterhead and the three-level cutterhead are equipped with upward stirrer gear, and the stirrer gear is located at institute
State the inside of outside bite.
Preferably, the bottom bite of the down-the-hold drill bit is tapered cutting edge；
The outside bite of the three-level cutterhead and second level cutterhead is spade cutting edge.
Preferably, the second level cutterhead and the three-level cutterhead all have two groups of cutterheads along same lineal layout, the two
Cutterhead be vertically arranged.
Preferably, the second level cutterhead and the three-level cutterhead all have three groups of cutterheads, are respectively respectively positioned on the auger spindle
Sustained height and be radially angularly distributed.
Preferably, it is additionally provided with level Four cutterhead above the three-level cutterhead, along being arranged radially for the auger spindle, cut
Cut the radius of clean-up that radius is greater than the three-level cutterhead；The down-the-hold drill bit, the second level cutterhead, the three-level cutterhead and described
The cutting face that the outside bite of level Four cutterhead is formed is in inverted conical shape on the whole；The radius of clean-up of the level Four cutterhead is
For pile radius.
Preferably, the down-hole hammer impactor is air hammer, is discharged after the air hammer work from bottom high
Press air.
Preferably, the connector is standard connection head.
A kind of uniaxial cement mixing method drill bit provided by the utility model, including connector, are used for and the single shaft
The drilling rod of cement-soil mixing pile machine is connected；Auger spindle, the upper end are connected with the connector；Three-level cutterhead, along the auger spindle
Be arranged radially, radius of clean-up is pile radius；Second level cutterhead, along being arranged radially and positioned at the three-level for the auger spindle
The lower section of cutterhead, radius of clean-up are less than the radius of clean-up of the three-level cutterhead；Down-hole hammer is set to the lower end of the auger spindle,
Including down-hole hammer impactor and down-the-hold drill bit.
When above-mentioned single shaft cement mixing method bit operation, down-the-hold drill bit rotary drilling cutting is first passed through, is sinking to creeping into
When meeting hard stratum or lump in the process, down-hole hammer impactor is able to drive down-the-hold drill bit axial vibration impact and advances, the vibration meeting
Destruction is generated to soil structures, not only can reduce resistance when drilling cutting, but also second level cutterhead and three-level can be made
Cutterhead stress is more balanced (avoiding hard place too hard).It is uniaxial compared to the prior art especially when encountering hard stratum or lump
Cement mixing method drill bit is easier for run-off the straight displacement, this single shaft cement mixing method drill bit is not susceptible to shift,
To which the stake position formed is more accurate, the overlap joint between adjacent studs is more complete.
In addition, second level cutterhead is located at the lower section of the three-level cutterhead, radius of clean-up is less than the former radius of clean-up, thus
Good guiding role is played to three-level cutterhead；Meanwhile three-level cutterhead carries out again the soil body on the basis of second level knife cutting
Secondary reaming, radius of clean-up are pile radius, and the stepped cut being consequently formed makes the two stress more balanced.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the front view of uniaxial cement mixing method drill bit in a kind of specific embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model core is to provide a kind of uniaxial cement mixing method drill bit, and when work is more uniformly stressed, can
Adjacent studs are preferably avoided to overlap incomplete problem.
Referring to FIG. 1, Fig. 1 is that uniaxial cement mixing method drill bit is faced in a kind of specific embodiment of the utility model
Figure.
In this specific embodiment, uniaxial cement mixing method drill bit includes connector 1, auger spindle 2, three-level cutterhead 3, second level knife
Disk 4 and down-hole hammer.Connector 1 is the connector between above-mentioned drill bit and uniaxial cement-soil mixing pile machine drilling rod, specifically, above-mentioned
The auger spindle 2 of drill bit is connected by connector 1 with the drilling rod of cement-soil mixing pile machine, and 1 selection standard connector of connector can increase
Add the versatility of the single shaft cement mixing method drill bit.
Three-level cutterhead 3 and being arranged radially along auger spindle 2 of second level cutterhead 4, are mainly used for cutting and stirring the soil body, second level knife
Disk 4 is located at the lower section of three-level cutterhead 3, and radius of clean-up is less than the former radius of clean-up, thus rises in drilling to three-level cutterhead 3
To good guiding role；Meanwhile three-level cutterhead 3 carries out reaming again to the soil body on the basis of second level cutterhead 4 is cut, and cuts
Both cutting radius is pile radius, and the stepped cut that the two is formed makes stress is more balanced, be different from the prior art in two
The setting of the same radius of grade cutterhead and three-level cutterhead.It should be noted that above-mentioned radius of clean-up is three-level cutterhead 3 and second level cutterhead
The maximum radius range that 4 outermost bites can be cut.
Specifically, when carrying out lapping construction to adjacent studs, if the setting of 4 radius of second level cutterhead is smaller and adjacent studs overlap joint is wide
Degree less, then can guarantee that second level cutterhead 4 is integrally respectively positioned in new soil layer in cutting, namely the soil layer not being cut, without
The engagement region (soil layer being cut) of adjacent studs position can be entered, thus the stress of second level cutterhead 4 is just more balanced, no
It easily shifts, at this time to the guiding role of three-level cutterhead 3 with regard to more obvious.The radius of second level cutterhead 4 can be tied in practical application
Adjacent studs lap width is closed specifically to be arranged.
Down-hole hammer includes down-hole hammer impactor 5 and down-the-hold drill bit 6, and down-hole hammer impactor 5 is mounted on the bottom of auger spindle 2, is dived
Drill 6 is mounted on the bottom of down-the-hole air hammer 5, before usual down-the-hold drill bit 6 is with above-mentioned uniaxial cement mixing method bit
Into, but down-the-hole air hammer 5 can drive the axially vibrated impact of down-the-hold drill bit 6 to advance when encountering hard stratum or hard clod.It is usually latent
The radius of drill 6 is smaller, and slightly larger than the drilling rod radius of uniaxial cement-soil mixing pile machine, bottom is equipped with bite 9 and facilitates brill
Into specifically, bite 9 can be set to tapered cutting edge, may be set to be other cutting edges, the cutting of tapered cutting edge
Intensity is larger, and stability and guiding performance are all more preferable.
When above-mentioned single shaft cement mixing method bit operation, first passes through down-the-hold drill bit 6, second level cutterhead 4 and three-level cutterhead 3 and revolve
Turn drilling cutting, when meeting hard stratum or lump in sinking drilling process, down-hole hammer impactor 5 is able to drive 6 axis of down-the-hold drill bit
Advance to vibratory impulse, which can generate destruction to soil structures, it not only can reduce resistance when drilling cutting, and
And second level cutterhead 4 and 3 stress of three-level cutterhead can be made more balanced (avoiding hard place too hard).Especially encountering hard stratum or hard
When block, uniaxial cement mixing method drill bit is easier for run-off the straight displacement compared to the prior art, this single shaft soil cement
Mixing pile drill bit is not susceptible to shift, so that the stake position formed is more accurate, the overlap joint between adjacent studs is more complete.
Above-mentioned second level cutterhead 4, three-level cutterhead 3 connect with auger spindle 2 and may be a fixed connection, for example weld, or can
Dismantling connection, such as bolt connect, and the latter can need for different pile radiuses using the three-level with different radiuss of clean-up
Cutterhead 3.
It, can be by hidden hole drilling in order to keep the effect of above-mentioned reaming step by step more preferable on the basis of above-mentioned specific embodiment
First 6, the cutting face that the outside bite three of second level cutterhead 4 and three-level cutterhead 3 is formed is arranged on the whole in inverted conical shape, should
Being arranged can make grading effect of the three in drilling more preferable, and guiding performance is also more preferable.
In general, second level cutterhead 4 and three-level cutterhead 3 can have several bites, direction is down-set, changes as one kind
Into both being located at outermost bite 8 and be arranged to spade cutting edge, which is conducive to be arranged different
Cutting angle, specific cutting angle can effectively utilize soil body counter-force and push drill bit drilling, while improve cutting and stirring
Efficiency, specific angle can be set according to the actual situation.
In a specific embodiment, upward stirrer gear 7 can be respectively provided on second level cutterhead 4 and three-level cutterhead 3,
Inside is respectively positioned on for outside bite 8.Specifically, second level cutterhead 4 and three-level cutterhead 3 can be all provided with and is set to along brill
The radially-arranged cutterhead of axis 2, every group of cutterhead include several bites, and bite on the outermost side is known as outside bite 8,
Stirrer gear 7 is arranged in the inside of outside bite 8, and the setting of such stirrer gear 7 would not influence the size of radius of clean-up.Into
And can still continue that downward bite is arranged in the inside of stirrer gear 7, bite, which is arranged, simultaneously in interior outside so that the soil body is obtained
To more fully cutting, to improve cutting and stirring efficiency.The setting of stirrer gear 7 can carry out secondary fill to upper part soil body
Divide stirring, the pile quality of cement mixing method can be effectively improved, certainly, one or more can be set in stirrer gear 7, multiple
Secondary agitation effect is more preferable.
As an improvement second level cutterhead 4 and three-level cutterhead 3 can be disposed as two groups of cutterheads, along with always
Line distribution, the cutterhead of the two are vertically arranged, which makes second level cutterhead 4 and three-level cutterhead 3 in work shape
Always different angles is in when state, so that the drill bit is more abundant to the cutting of the soil body.Further to promote stock-removing efficiency, may be used also
Second level cutterhead 4 and three-level cutterhead 3 are disposed as three groups of cutterheads or four groups of cutterheads, the equivalent height being respectively respectively positioned on auger spindle 2
Degree and radially equidistantly distributed.
In a specific embodiment, level Four cutterhead can also be further arranged in above-mentioned uniaxial cement mixing method drill bit,
The level Four cutterhead can also have several bites, be located at the top of three-level cutterhead 3, and its radius of clean-up is greater than three-level knife
The radius of clean-up of disk 3.The setting of the level Four cutterhead is to carry out after down-the-hold drill bit 6, second level cutterhead 4, three-level cutterhead 3 to the soil body
Four reamings are carried out to the soil body after cutting, is the continuity of stepped cut, reaming mode step by step, reaming can be further increased
Radius.The connection type of the level Four cutterhead and auger spindle 2 is the same as second level cutterhead 4 and three-level cutterhead 3.It is, of course, also possible to according to practical need
Want, continue in the top of level Four cutterhead setting Pyatyi cutterhead, six grades of cutterheads etc., the radius of clean-up of afterbody cutterhead be at
Stake radius.
In a kind of specific embodiment, set the down-hole hammer impactor 5 in above-mentioned uniaxial cement mixing method drill bit to
Pressure-air is discharged from bottom after the air hammer work, after the discharge of pressure-air can make cutting in air hammer
Soil shear failure it is more uniform.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Uniaxial cement mixing method drill bit provided by the utility model is described in detail above.It is used herein
Specific case is expounded the principles of the present invention and embodiment, and the explanation of above example is only intended to help
Understand the method and its core concept of the utility model.It should be pointed out that for those skilled in the art,
Under the premise of not departing from the utility model principle, several improvements and modifications can be made to this utility model, these improve and
Modification is also fallen into the protection scope of the utility model claims.
Claims (9)
1. a kind of single shaft cement mixing method drill bit characterized by comprising
Connector (1), for being connected with the drilling rod of the uniaxial cement-soil mixing pile machine；
Auger spindle (2), the upper end are connected with the connector (1)；
Three-level cutterhead (3), along being arranged radially for the auger spindle (2), radius of clean-up is pile radius；
Second level cutterhead (4), along the lower section of the auger spindle (2) being arranged radially and be located at the three-level cutterhead (3), radius of clean-up
Less than the radius of clean-up of the three-level cutterhead (3)；
Down-hole hammer is set to the lower end of the auger spindle (2), including down-hole hammer impactor (5) and down-the-hold drill bit (6).
2. single shaft cement mixing method drill bit as described in claim 1, which is characterized in that
What the outside bite of the down-the-hold drill bit (6), the second level cutterhead (4) and the three-level cutterhead (3) three was formed cuts
Bevel is in inverted conical shape on the whole.
3. single shaft cement mixing method drill bit as claimed in claim 2, which is characterized in that
The second level cutterhead (4) and the three-level cutterhead (3) are equipped with upward stirrer gear (7), and the stirrer gear (7) is located at institute
State the inside of outside bite (8).
4. single shaft cement mixing method drill bit as claimed in claim 3, which is characterized in that
The bottom bite (9) of the down-the-hold drill bit (6) is tapered cutting edge；
The outside bite (8) of the three-level cutterhead (3) and second level cutterhead (4) is spade cutting edge.
5. single shaft cement mixing method drill bit as claimed in claim 4, which is characterized in that the second level cutterhead (4) and described
Three-level cutterhead (3) all has two groups of cutterheads along same lineal layout, and the cutterhead of the two is vertically arranged.
6. single shaft cement mixing method drill bit as claimed in claim 4, which is characterized in that
The second level cutterhead (4) and the three-level cutterhead (3) all have three groups of cutterheads, are respectively respectively positioned on the auger spindle (2)
Sustained height is simultaneously radially angularly distributed.
7. the uniaxial cement mixing method drill bit as described in claim 1-6 is any, which is characterized in that the three-level cutterhead (3)
Top be additionally provided with level Four cutterhead, along being arranged radially for the auger spindle (2), radius of clean-up be greater than the three-level cutterhead
(3) radius of clean-up；The down-the-hold drill bit (6), the second level cutterhead (4), the three-level cutterhead (3) and the level Four cutterhead four
The cutting face that the outside bite of person is formed is in inverted conical shape on the whole；The radius of clean-up of the level Four cutterhead is pile half
Diameter.
8. single shaft cement mixing method drill bit as claimed in claim 7, which is characterized in that the down-hole hammer impactor (5) is
Pressure-air is discharged from bottom after the air hammer work in air hammer.
9. single shaft cement mixing method drill bit as claimed in claim 8, which is characterized in that
The connector (1) is standard connection head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821328450.3U CN208578508U (en) | 2018-08-16 | 2018-08-16 | A kind of single shaft cement mixing method drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821328450.3U CN208578508U (en) | 2018-08-16 | 2018-08-16 | A kind of single shaft cement mixing method drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN208578508U true CN208578508U (en) | 2019-03-05 |
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ID=65512306
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821328450.3U Active CN208578508U (en) | 2018-08-16 | 2018-08-16 | A kind of single shaft cement mixing method drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868590A (en) * | 2018-08-16 | 2018-11-23 | 北京城建勘测设计研究院有限责任公司 | A kind of single shaft cement mixing method drill bit |
-
2018
- 2018-08-16 CN CN201821328450.3U patent/CN208578508U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868590A (en) * | 2018-08-16 | 2018-11-23 | 北京城建勘测设计研究院有限责任公司 | A kind of single shaft cement mixing method drill bit |
| CN108868590B (en) * | 2018-08-16 | 2023-12-08 | 北京城建勘测设计研究院有限责任公司 | Single-shaft cement-soil mixing pile drill bit |
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