CN104533292A - Back taper step-shaped pile, preparation method thereof and drilling tool - Google Patents
Back taper step-shaped pile, preparation method thereof and drilling tool Download PDFInfo
- Publication number
- CN104533292A CN104533292A CN201410851270.3A CN201410851270A CN104533292A CN 104533292 A CN104533292 A CN 104533292A CN 201410851270 A CN201410851270 A CN 201410851270A CN 104533292 A CN104533292 A CN 104533292A
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- Prior art keywords
- back taper
- ramp type
- stepped ramp
- taper stepped
- scraper
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- 238000005553 drilling Methods 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 36
- 230000006835 compression Effects 0.000 claims description 41
- 238000007906 compression Methods 0.000 claims description 41
- 239000004567 concrete Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009466 transformation Effects 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
- E21B7/30—Enlarging drilled holes, e.g. by counterboring without earth removal
-
- 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
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- 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
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a back taper step-shaped pile, a preparation method of the back taper step-shaped pile and a drilling tool. The drilling tool comprises a hollow drill rod, a drill bit arranged at the lower end of the hollow drill rod and a soil-retaining drilling tool body coaxial with the hollow drill rod. The drilling tool further comprises a hydraulic scrape boring bar arranged on the hollow drill rod, wherein the hydraulic scrape boring bar comprises a hydraulic oil pump, a hydraulic contracting and stretching scraper and a hydraulic oil pipe; the hydraulic oil pump supplies conveying power to the hydraulic contracting and stretching scraper through the hydraulic oil pipe. The back taper step-shaped pile is composed of at least two back taper step-shaped bodies and at least two back taper step-shaped extension bodies. According to the back taper step-shaped pile, the preparation method of the back taper step-shaped pile and the drilling tool, the bearing capacity of the back taper step-shaped pile contains the pile periphery frictional force and the pile tip resistance of a traditional pile body; moreover, downward bevels of the back taper step-shaped bodies convert part of vertically downward force into tangential force and normal force, pile periphery soil forms passively pressed stress in an extruded and expanded state, the pile periphery frictional force developing coefficient is increased, the bearing capacity of a single pile is improved comprehensively, and the settling volume is lowered.
Description
Technical field
The present invention relates to a kind of back taper stepped ramp type stake and preparation method thereof and drilling tool, belong to building field.
Background technology
In the tide of reform and opening-up, builing industry has had develop rapidly, construction work is more and more higher to the design of ground, construction requirement, concrete stake and reinforced concrete pile are used widely in the engineerings such as highrise building, bridge, harbour, bending resistance, resistance to plucking distortion is met in order to make concrete stake and reinforced concrete pile, improve the designing requirement such as bearing capacity and shockproof requirements, the shape of concrete stake and reinforced concrete pile is changed.Not only can meet design requirement, save material consumption, can also improve workmanship.
Conventional piles body structure, with the change of pile body length, its pile body cross section physical dimension also no longer changes, equal diameter or etc. the length of side, its bearing capacity be pile peripheral friction force and end resistance composition.
Summary of the invention
The technical problem of the present invention and solution, a kind of back taper stepped ramp type stake and preparation method thereof and drilling tool are provided, the stake of described back taper stepped ramp type is made up of multiple (or individual arbitrarily) back taper stepped ramp type body and back taper stepped ramp type extension body, with the change of length, its pile body cross section physical dimension size also changes again, bearing capacity not only has pile peripheral friction force and the end resistance of traditional pile body, and back taper stepped ramp type body towards lower inclined plane, the power that sections transverse is vertically downward is become tangential force and normal force, soil around pile forms passive compression chord and squeezed state, now pile peripheral friction force mobilization factor becomes large, comprehensively improve the bearing capacity of single pile, reduce settling amount.Structural change function, the mechanics function that this structure plays power also demonstrates mechanics principle---Tai Shaji (Terzaghi) force equation of ground circle soil mechanics.The stake of this kind of back taper stepped ramp type is used for anti-floating pile, and uplift resistance more has extraordinary effect.
Described back taper stepped ramp type stake drilling tool is in the patent No.: Creative Design is carried out on ZL 201420200835.7 basis and forms, and introduces ZL 201420200835.7 in full as a application's part.
In order to solve the problems of the technologies described above, the present invention by the following technical solutions:
(1) a kind of back taper stepped ramp type stake drilling tool, the gear earth boring auger tool comprising hollow drill, be arranged at the drill bit of hollow drill lower end and coaxially arrange with hollow drill, comprise the hydraulic pressure scrape boring bar be arranged on described hollow drill in addition, described hydraulic pressure scrape boring bar comprise hydraulic oil pump, hydraulic compression opens scraper and hydraulic oil pipe, described hydraulic oil pump opens scraper transmitting power to described hydraulic compression by hydraulic oil pipe.
(2) the back taper stepped ramp type stake drilling tool Gen Ju (1), described hydraulic compression is opened scraper and is made up of hollow jack and scraper.
(3) according to (1) or the back taper stepped ramp type stake drilling tool described in (2), described hydraulic oil pump is arranged at the top of hollow drill or installs hydraulic rotary joint device on the top of hollow drill, hydraulic oil pump is arranged on long-spiral drilling machine operating platform, described hydraulic compression opens the bottom that scraper is arranged at hollow drill, and described hydraulic oil pipe is arranged at the outside of hollow drill.
(4) a back taper stepped ramp type stake, is made up of at least two back taper stepped ramp type bodies and at least two back taper stepped ramp type extension bodies.
(5) the back taper stepped ramp type stake Gen Ju (4), described back taper stepped ramp type body cross section is circular, and cross section physical dimension size is pushed up at the bottom of stake by stake and constantly changed.Section is for being similar to triangle, being similar to rhombus, being similar to hexagon.
(6) according to (4) or the back taper stepped ramp type stake described in (5), back taper stepped ramp type body towards lower inclined plane, the power that sections transverse is vertically downward is become tangential force and normal force.
(7) according to the back taper stepped ramp type stake described in any one of (4)-(6), the angle angular range towards lower inclined plane and back taper stepped ramp type extension body side and horizontal plane of described back taper stepped ramp type body is and is greater than 0 degree and is less than 90 degree.
(8) according to the back taper stepped ramp type stake described in any one of (4)-(7), the inclined-plane of described back taper stepped ramp type body is divided into towards above with towards below, towards above both can plane, also can inclined-plane; Court is inclined-plane below.
(9) preparation method for back taper stepped ramp type stake, comprises the following steps
A. back taper stepped ramp type stake drilling tool is in drilling process, and when running into the stratum that earth formation is stablized, compressibilty is less, bearing capacity is higher, thickness is larger, primer fluid pressure oil pump, is opened the jack transmitting power of scraper, make it open scraper to hydraulic compression by hydraulic oil pipe;
B., while scraper opening procedure, hydraulic compression is driven to open scraper clockwise or horizontally rotate in constant depth counterclockwise, formation pile body deep back taper stepped ramp type body by hollow drill;
C., after back taper stepped ramp type body is formed, hydraulic oil pump is converted to a jack pressure release state contracting scraper and retracts, and back taper stepped ramp type stake drilling tool continues deep and creeps into, and forms back taper stepped ramp type extension body;
D. repeat b and step c, form back taper stepped ramp type body and the back taper stepped ramp type extension body of predetermined quantity;
E., after back taper stepped ramp type stake drilling tool reaches projected depth, pressure concrete injecting while mentioning back taper stepped ramp type stake drilling tool, forms the stake of back taper stepped ramp type.
(10) preparation method for back taper stepped ramp type stake, comprises the following steps
A. under hydraulic compression opens scraper retracted mode, back taper stepped ramp type stake drilling tool drilling to completion;
B. pressure concrete injecting while mentioning back taper stepped ramp type stake drilling tool, ensure that in back taper stepped ramp type stake drilling tool central tube, concrete face is more than ground, have enough pressure to concrete, the concrete face in making it hole ensures bury drills more than 2 meters;
C. when hydraulic compression open scraper carry to desired depth time, primer fluid pressure oil pump, is opened the jack transmitting power of scraper, makes it open scraper to hydraulic compression by hydraulic oil pipe;
D. in scraper opening procedure, by hollow drill drive hydraulic compression open scraper clockwise or anticlockwise horizontal rotate, thus form back taper stepped ramp type body in pile body deep;
E. retraction hydraulic compression opens scraper, repeats c and Step d, forms back taper stepped ramp type body and the back taper stepped ramp type extension body of predetermined quantity;
F. finally retraction hydraulic compression opens scraper, and pressure concrete, carries brill, forms the stake of back taper stepped ramp type.
A kind of back taper stepped ramp type provided by the invention stake and preparation method thereof and drilling tool, the stake of described back taper stepped ramp type is made up of multiple (or individual arbitrarily) back taper stepped ramp type body and back taper stepped ramp type extension body, with the change of length, its pile body cross section physical dimension size also changes again, bearing capacity not only has pile peripheral friction force and the end resistance of traditional pile body, and back taper stepped ramp type body towards lower inclined plane, the power that sections transverse is vertically downward is become tangential force and normal force, soil around pile forms passive compression chord and squeezed state, now pile peripheral friction force mobilization factor becomes large, comprehensively improve the bearing capacity of single pile, reduce settling amount.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is the structural representation that hydraulic compression opens back taper stepped ramp type stake drilling tool under scraper open mode;
Fig. 2 is the structural representation that hydraulic compression opens back taper stepped ramp type stake drilling tool under scraper retracted mode;
Fig. 3 is the structural representation of similar triangle back taper stepped ramp type stake;
Fig. 4 is the structural representation of similar rhombus back taper stepped ramp type stake.
Fig. 5 is the structural representation of similar hexagon back taper stepped ramp type stake.
In figure, 1 is hollow drill, and 2 is drill bit, and 3 is gear earth boring auger tool, and 4 is hydraulic oil pump, and 5 is hydraulic oil pipe, and 6 open scraper for hydraulic compression, and 7 is back taper stepped ramp type body, and 8 is back taper stepped ramp type extension body.
Detailed description of the invention
Embodiment 1:
As shown in Figure 1, 2, a kind of back taper stepped ramp type stake drilling tool, comprise hollow drill 1, be arranged at the drill bit 2 of hollow drill 1 lower end and the gear earth boring auger tool 3 that arrange coaxial with hollow drill 1, also comprise the hydraulic pressure scrape boring bar be arranged on described hollow drill 1, described hydraulic pressure scrape boring bar comprises hydraulic oil pump 4, hydraulic compression opens scraper 5 and hydraulic oil pipe 6, and described hydraulic oil pump 4 opens scraper 6 transmitting power to described hydraulic compression by hydraulic oil pipe 5.Described hydraulic compression is opened scraper and is made up of (not marking in figure) hollow jack and scraper.Described hydraulic oil pump 4 is arranged at the top of hollow drill 1, and described hydraulic compression opens the bottom that scraper 6 is arranged at hollow drill 1, and described hydraulic oil pipe 6 is arranged at the outside of hollow drill 1.
Can install hydraulic rotary joint device on the top of hollow drill 1 in order to easy to operate, and hydraulic oil pump is arranged on long-spiral drilling machine operating platform.
Embodiment 2:
As shown in Fig. 3,4,5, the stake of a kind of back taper stepped ramp type, is made up of at least two back taper stepped ramp type bodies 7 and at least two back taper stepped ramp type extension bodies 8.Described back taper stepped ramp type body 7 section is for being similar to triangle (as shown in Figure 3), being similar to rhombus (as shown in Figure 4), being similar to hexagon (as shown in Figure 5).Back taper stepped ramp type body 7 towards lower inclined plane, the power that sections transverse is vertically downward is become tangential force and normal force.The angle angular range towards lower inclined plane and back taper stepped ramp type extension body 8 side and horizontal plane of described back taper stepped ramp type body 7 is and is greater than 0 degree and is less than 90 degree.The inclined-plane of described back taper stepped ramp type body 7 is divided into towards above with towards below, towards above both can plane, also can inclined-plane; Court is inclined-plane below.
Embodiment 3:
The preparation method of a kind of back taper stepped ramp type stake, comprise the following steps: a. back taper stepped ramp type stake drilling tool is in drilling process, primer fluid pressure oil pump when running into the stratum that earth formation is stablized, compressibilty is less, bearing capacity is higher, thickness is larger, opened the jack transmitting power of scraper by hydraulic oil pipe to hydraulic compression, make it open scraper;
B., while scraper opening procedure, hydraulic compression is driven to open scraper clockwise or horizontally rotate in constant depth counterclockwise, formation pile body deep back taper stepped ramp type body by hollow drill;
C., after back taper stepped ramp type body is formed, hydraulic oil pump is converted to a jack pressure release state contracting scraper and retracts, and back taper stepped ramp type stake drilling tool continues deep and creeps into, and forms back taper stepped ramp type extension body;
D. repeat b and step c, form back taper stepped ramp type body and the back taper stepped ramp type extension body of predetermined quantity;
E., after back taper stepped ramp type stake drilling tool reaches projected depth, pressure concrete injecting while mentioning back taper stepped ramp type stake drilling tool, forms the stake of back taper stepped ramp type.
Embodiment 4:
A preparation method for back taper stepped ramp type stake, comprises the following steps:
A. under hydraulic compression opens scraper retracted mode, back taper stepped ramp type stake drilling tool drilling to completion;
B. pressure concrete injecting while mentioning back taper stepped ramp type stake drilling tool, ensure that in back taper stepped ramp type stake drilling tool central tube, concrete face is more than ground, have enough pressure to concrete, the concrete face in making it hole ensures bury drills more than 2 meters;
C. when hydraulic compression open scraper carry to desired depth time, primer fluid pressure oil pump, is opened the jack transmitting power of scraper, makes it open scraper to hydraulic compression by hydraulic oil pipe;
D. in scraper opening procedure, by hollow drill drive hydraulic compression open scraper clockwise or anticlockwise horizontal rotate, thus form back taper stepped ramp type body in pile body deep;
E. retraction hydraulic compression opens scraper, repeats c and Step d, forms back taper stepped ramp type body and the back taper stepped ramp type extension body of predetermined quantity;
F. finally retraction hydraulic compression opens scraper, and pressure concrete, carries brill, forms the stake of back taper stepped ramp type.
Above embodiment object is the present invention is described, but not limits the scope of the invention, and all simple transformation made under the condition without prejudice to spiritual principles of the present invention all fall within the scope of protection of the present invention.
Claims (10)
1. a back taper stepped ramp type stake drilling tool, the gear earth boring auger tool comprising hollow drill, be arranged at the drill bit of hollow drill lower end and coaxially arrange with hollow drill, it is characterized in that: also comprise the hydraulic pressure scrape boring bar be arranged on described hollow drill, described hydraulic pressure scrape boring bar comprises hydraulic oil pump, hydraulic compression opens scraper and hydraulic oil pipe, and described hydraulic oil pump opens scraper transmitting power to described hydraulic compression by hydraulic oil pipe.
2. back taper stepped ramp type stake drilling tool according to claim 1, it is characterized in that, described hydraulic compression is opened scraper and is made up of hollow jack and scraper, and scraper quantity is made up of individual arbitrarily.
3. back taper stepped ramp type stake drilling tool according to claim 1, it is characterized in that, described hydraulic oil pump is arranged at the top of hollow drill or installs hydraulic rotary joint device on the top of hollow drill, hydraulic oil pump is arranged on long-spiral drilling machine operating platform, described hydraulic compression opens the bottom that scraper is arranged at hollow drill, and described hydraulic oil pipe is arranged at the outside of hollow drill.
4. a back taper stepped ramp type stake, is characterized in that: be made up of at least two back taper stepped ramp type bodies and at least two back taper stepped ramp type extension bodies.
5. back taper stepped ramp type according to claim 4 stake, it is characterized in that: described back taper stepped ramp type body cross section is for circular, cross section physical dimension size is pushed up at the bottom of stake by stake and is constantly changed, and section is for being similar to triangle, being similar to rhombus, being similar to hexagon.
6. back taper stepped ramp type according to claim 4 stake, is characterized in that, back taper stepped ramp type body towards lower inclined plane, the power that sections transverse is vertically downward is become tangential force and normal force.
7. back taper stepped ramp type according to claim 4 stake, is characterized in that, the angle angular range towards lower inclined plane and back taper stepped ramp type extension body side and horizontal plane of described back taper stepped ramp type body is and is greater than 0 degree and is less than 90 degree.
8. back taper stepped ramp type according to claim 4 stake, is characterized in that, the face of described back taper stepped ramp type body is divided into towards above with towards below, towards above both can plane, also can inclined-plane; Court is inclined-plane below.
9. a preparation method for back taper stepped ramp type stake, is characterized in that, comprises the following steps
A. back taper stepped ramp type stake drilling tool is in drilling process, and when running into the stratum that earth formation is stablized, compressibilty is less, bearing capacity is higher, thickness is larger, primer fluid pressure oil pump, is opened the jack transmitting power of scraper, make it open scraper to hydraulic compression by hydraulic oil pipe;
B., while scraper opening procedure, hydraulic compression is driven to open scraper clockwise or horizontally rotate in constant depth counterclockwise, formation pile body deep back taper stepped ramp type body by hollow drill;
C., after back taper stepped ramp type body is formed, hydraulic oil pump is converted to a jack pressure release state contracting scraper and retracts, and back taper stepped ramp type stake drilling tool continues deep and creeps into, and forms back taper stepped ramp type extension body;
D. repeat b and step c, form back taper stepped ramp type body and the back taper stepped ramp type extension body of predetermined quantity;
E., after back taper stepped ramp type stake drilling tool reaches projected depth, pressure concrete injecting while mentioning back taper stepped ramp type stake drilling tool, forms the stake of back taper stepped ramp type.
10. a preparation method for back taper stepped ramp type stake, is characterized in that, comprises the following steps
A. under hydraulic compression opens scraper retracted mode, back taper stepped ramp type stake drilling tool drilling to completion;
B. pressure concrete injecting while mentioning back taper stepped ramp type stake drilling tool, ensure that in back taper stepped ramp type stake drilling tool central tube, concrete face is more than ground, have enough pressure to concrete, the concrete face in making it hole ensures bury drills more than 2 meters;
C. when hydraulic compression open scraper carry to desired depth time, primer fluid pressure oil pump, is opened the jack transmitting power of scraper, makes it open scraper to hydraulic compression by hydraulic oil pipe;
D. in scraper opening procedure, by hollow drill drive hydraulic compression open scraper clockwise or anticlockwise horizontal rotate, thus form back taper stepped ramp type body in pile body deep;
E. retraction hydraulic compression opens scraper, repeats c and Step d, forms back taper stepped ramp type body and the back taper stepped ramp type extension body of predetermined quantity;
F. finally retraction hydraulic compression opens scraper, and pressure concrete, carries brill, forms the stake of back taper stepped ramp type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410851270.3A CN104533292A (en) | 2014-12-31 | 2014-12-31 | Back taper step-shaped pile, preparation method thereof and drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410851270.3A CN104533292A (en) | 2014-12-31 | 2014-12-31 | Back taper step-shaped pile, preparation method thereof and drilling tool |
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| CN104533292A true CN104533292A (en) | 2015-04-22 |
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| CN201410851270.3A Pending CN104533292A (en) | 2014-12-31 | 2014-12-31 | Back taper step-shaped pile, preparation method thereof and drilling tool |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831718A (en) * | 2015-06-05 | 2015-08-12 | 赵子健 | Implementation method for rhombus composite stirring pile forming machine |
| CN104963626A (en) * | 2015-06-17 | 2015-10-07 | 黄朝阳 | Long spiral drilling machine used for forming long spiral broaching pile and pile forming method |
| CN106948762A (en) * | 2017-05-12 | 2017-07-14 | 李广信 | The stake of CFG reducing back tapers stepped ramp type and preparation method and drilling tool |
| CN106978974A (en) * | 2017-05-12 | 2017-07-25 | 李广信 | The stake of CFG reducing back tapers stepped ramp type and preparation method and drilling tool |
| CN108035341A (en) * | 2018-01-24 | 2018-05-15 | 李广信 | Extruding and removing soil complex superposition is nested drilling tool, the back taper stepped ramp type stake of CFG reducings and method |
| CN109098655A (en) * | 2018-10-11 | 2018-12-28 | 李广信 | More Power compound drilling tools, preparation method and type stake |
| US20210355648A1 (en) * | 2020-08-01 | 2021-11-18 | Bahman Niroumand | Mandrel for soil compaction |
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| CN101457522A (en) * | 2009-01-05 | 2009-06-17 | 广州市地平线岩土工程有限公司 | Long spiral support disk pile construction method |
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| CN203939424U (en) * | 2014-04-23 | 2014-11-12 | 贾前卫 | A kind of for pressing the spiral drilling machine of filling with the stake of back taper stepped ramp type concrete |
| CN204532073U (en) * | 2014-12-31 | 2015-08-05 | 贾前卫 | A kind of back taper stepped ramp type stake and drilling tool thereof |
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| JPS63277319A (en) * | 1987-04-11 | 1988-11-15 | Oyo Chishitsu Kk | Setting of friction pile |
| CN1158376A (en) * | 1996-12-10 | 1997-09-03 | 张国梁 | Pile structure construction method and special appts. thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831718A (en) * | 2015-06-05 | 2015-08-12 | 赵子健 | Implementation method for rhombus composite stirring pile forming machine |
| CN104963626A (en) * | 2015-06-17 | 2015-10-07 | 黄朝阳 | Long spiral drilling machine used for forming long spiral broaching pile and pile forming method |
| CN106948762A (en) * | 2017-05-12 | 2017-07-14 | 李广信 | The stake of CFG reducing back tapers stepped ramp type and preparation method and drilling tool |
| CN106978974A (en) * | 2017-05-12 | 2017-07-25 | 李广信 | The stake of CFG reducing back tapers stepped ramp type and preparation method and drilling tool |
| CN106948762B (en) * | 2017-05-12 | 2023-12-08 | 李广信 | CFG reducing back taper stepped pile, preparation method and drilling tool |
| CN106978974B (en) * | 2017-05-12 | 2024-04-09 | 李广信 | CFG reducing back taper stepped pile, preparation method and drilling tool |
| CN108035341A (en) * | 2018-01-24 | 2018-05-15 | 李广信 | Extruding and removing soil complex superposition is nested drilling tool, the back taper stepped ramp type stake of CFG reducings and method |
| CN109098655A (en) * | 2018-10-11 | 2018-12-28 | 李广信 | More Power compound drilling tools, preparation method and type stake |
| CN109098655B (en) * | 2018-10-11 | 2024-02-06 | 李广信 | Multi-power composite drilling tool, preparation method and pile |
| US20210355648A1 (en) * | 2020-08-01 | 2021-11-18 | Bahman Niroumand | Mandrel for soil compaction |
| US12018450B2 (en) * | 2020-08-01 | 2024-06-25 | Bahman Niroumand | Mandrel for soil compaction |
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Application publication date: 20150422 |