CN106049463B - The construction method and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake - Google Patents
The construction method and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake Download PDFInfo
- Publication number
- CN106049463B CN106049463B CN201610362530.XA CN201610362530A CN106049463B CN 106049463 B CN106049463 B CN 106049463B CN 201610362530 A CN201610362530 A CN 201610362530A CN 106049463 B CN106049463 B CN 106049463B
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- inner cylinder
- pile
- drilling tool
- outer barrel
- wall
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Links
- 238000005553 drilling Methods 0.000 title claims abstract description 50
- 238000010276 construction Methods 0.000 title abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 abstract description 40
- 238000005056 compaction Methods 0.000 abstract description 22
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000010412 perfusion Effects 0.000 description 6
- 239000011440 grout Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/327—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being pivoted about a longitudinal axis
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The present invention provides the construction methods and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake.The earth-squeezing hole-enlarging stake includes soil compaction portion and the reamer positioned at soil compaction portion bottom, the soil compaction portion includes pile foundation and is filled in the concrete-pile ontology of pile foundation, the pile foundation includes the soil compaction layer positioned at its inner peripheral, the internal thread for being formed in the soil compaction layer inner wall, the concrete-pile ontology includes the external screw thread for being formed in its outer wall, the internal thread and the external thread bolt connection.The blocking coil structures of the present invention to it is squeezed into the hole wall of stake carry out second and squeeze, stop that formation of pile soil is not screwed out directly squeezed pile, and enlarged footing is set as the double-layer structure of inner cylinder and outer barrel, flaring tooth is set on inner cylinder, and utilize the rotation of the enlarged footing, the stretching and contraction of control flaring tooth, complete the flaring to different soil properties.
Description
【Technical field】
The present invention relates to build engineering field, and in particular to the construction method of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake and
Its drilling tool.
【Background technology】
At present in the foundation engineerings such as building, water conservancy, highway, double helix extruded and extended pile is currently used pile foundation form, this
Construction method creeps into squeezed hole including the use of bidirectional helix closed extruding-enlarging aiguille, is come out in downward rotary drill squeezed hole by rotary drill
The soil body can be squeezed into stake holes side wall, then moved upwards bidirectional helix closed extruding-enlarging aiguille and rotated squeezed stake holes again,
The slump soil body can be squeezed into stake holes side wall in stake holes in squeezed promotion is rotated up, and promoted simultaneously in upper rotation, started coagulation
Soil pumps to stake holes internal pressure and fills piling.Existing main problem is first out to be transported up native rotary digging again squeezing to the pile lining of both sides again
Pressure, therefore the soil spun out can block the conveying channel that rotating vane is formed, and easily generate bit bouncing phenomenon.And discharge
Soil or mud increase bore forming difficulty and progress.
With the increase of building height, foundation pile length is stepped up, and the difficulty of pile foundation construction is also increasing.Existing stake
The bearing capacity of the bored concrete pile of foundation construction is mainly made of stake end soil resistance and Pile side soil frictional force；The enlarged footing of pile foundation makes
It is formed with cement high-pressure mortar spraying, however may can not be met using above-mentioned bored concrete pile under current complex geological condition and wanted
It asks.
Therefore, it is necessary to provide a kind of construction of the earth-squeezing hole-enlarging stake and earth-squeezing hole-enlarging stake used under complex geological condition
Method and its drilling tool.
【Invention content】
The purpose of the present invention is to provide the construction methods and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake.
Technical scheme is as follows：
A kind of earth-squeezing hole-enlarging stake, including soil compaction portion and the reamer positioned at soil compaction portion bottom, the soil compaction portion includes pile foundation
And the concrete-pile ontology of pile foundation is filled in, the pile foundation includes the soil compaction layer positioned at its inner peripheral, is formed in the soil compaction layer
The internal thread of inner wall, the concrete-pile ontology include the external screw thread for being formed in its outer wall, the internal thread and the external screw thread
It is spirally connected；The reamer includes the pile foundation head extended to form from the pile foundation bottom, the cement for being covered in the pile foundation head inner wall
Pulp layer, the concrete pile head being filled in the grout layer.
Preferably, the concrete-pile ontology and the concrete pile head one form.
A kind of construction method of earth-squeezing hole-enlarging stake, includes the following steps：
(1), the drilling tool of tool blocking circle is provided, rotates in the forward direction using the drilling tool and drills to soil, the drilling tool exists
The inner wall for forming pile foundation forms soil compaction layer；
(2), when the drilling depth of the drilling tool reaches the predetermined depth of pile foundation, stop the drilling tool；
(3), the drilling tool further includes the enlarged footing positioned at its bottom, the enlarged footing tool flaring tooth and extending port, passes through
The drilling rod drives the enlarged footing to reversely rotate, and the flaring tooth stretches out outward across the extending port, passes through the expansion
Ability to speak is enlarged pile foundation bottom, after forming pile foundation head, stops the drilling tool；
(4), the enlarged footing is driven to rotate in the forward direction again, the flaring tooth is made to be stretched into inwardly simultaneously across the extending port
After being contained in the extending port, stop the drilling tool；
(5), whitewashing is carried out to the inner wall of pile foundation head and forms grout layer；
(6), after the completion of whitewashing, by drilling tool, spiral shell goes out out of pile foundation, while successively to concrete perfusion in pile foundation head and pile foundation；
(7), the outer wall for stopping circle includes external screw thread, and the external screw thread is outside the soil compaction layer inner wall forms and is described
The internal thread of screw thread engagement；
(8), in the pile foundation while concrete perfusion to concrete perfusion in the internal thread, complete the soil compaction and expand
Hole stake.
A kind of drilling tool, including having the drilling rod of drill bit and being sheathed on the enlarged footing of the drill bit, the enlarged footing includes flaring
Tooth, inner cylinder and the outer barrel for being sheathed on inner cylinder, and the inner cylinder and the outer barrel are arranged at intervals, the inner cylinder includes clamping part, institute
It states outer barrel and includes limiting section and extending port, the limiting section quantity is two and interval is formed on the inner peripheral of the outer barrel,
The clamping part is formed on the outer peripheral edge of the inner cylinder and is arranged between two limiting sections, the extending port be through
The through-hole of the outer barrel, the flaring tooth include with the connecting portion of inner cylinder activity and extend from the connecting portion and be inserted into institute
State the expansion mouth of extending port；The drilling rod further includes sequentially connected ontology, blocking circle and borded pile, and the borded pile is described in
Drill bit extends to form, and the ontology, blocking circle, borded pile and drill bit are set with central shaft, and the internal diameter of the blocking circle is more than institute
Borded pile and the ontology are stated, and the depth of thread for being surrounded on the spiral column outer wall is more than the screw thread of the blocking ring outer wall.
Preferably, the screw thread Zhou Jing of the blocking ring outer wall is identical with the screw thread week diameter of the spiral column outer wall.
Preferably, the inner cylinder and the outer barrel are the hollow cylinder with central shaft.
Preferably, the inner cylinder and the outer barrel are by the limiting section and the clamping part and in two limiting sections
Between the long range of circular arc in reversed coaxial rotating.
Preferably, between two limiting sections circular arc string length be less than the expansion mouth length.
Preferably, by the relative rotation of the inner cylinder and the outer barrel, the expansion mouth is stretched along the extending port direction
Go out and shrink.
Preferably, the limiting section is formed in same level with the clamping part.
The beneficial effects of the present invention are：
1st, blocking coil structures to it is squeezed into the hole wall of stake carry out second and squeeze, blocking formation of pile soil is not screwed out
Direct squeezed pile, structure novel, pile quality are good, are not easy bit bouncing.
2nd, environmentally friendly, no mud discharge, no dregs is transported outward, and no construction fugitive dust does not need to deposit soil site, and the environment of surrounding will not
It is contaminated.
3rd, the double-layer structure that head is set as inner cylinder and outer barrel is will be enlarged by, flaring tooth is set on inner cylinder, and utilize the expansion
The rotation of major part, the stretching and contraction of control flaring tooth, completes the flaring to different soil properties, the structure design is simple, it is at low cost,
Effect is good, suitable for producing in batches and promote the use of.
【Description of the drawings】
Fig. 1 is the sectional view of earth-squeezing hole-enlarging stake of the present invention；
Fig. 2 is the structure chart of drilling tool of the present invention；
Fig. 3 is the sectional view of the enlarged footing use state one of drilling tool shown in Fig. 2；
Fig. 4 is the sectional view of the enlarged footing use state two of drilling tool shown in Fig. 2.
【Specific embodiment】
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Please refer to Fig. 2 to Fig. 4, the present invention provides a kind of drilling tool 100, including having the drilling rod 2 of drill bit 21 and being arranged
In the enlarged footing 1 of the drill bit 21.
The enlarged footing 1 includes flaring tooth 11, inner cylinder 12 and the outer barrel 13 for being sheathed on inner cylinder 12, and the inner cylinder 12 and institute
Outer barrel 13 is stated to be arranged at intervals.
The inner cylinder 12 includes clamping part 121.
The outer barrel 13 includes limiting section 131 and extending port 133, and 131 quantity of limiting section is two and interval is formed
In on the inner peripheral of the outer barrel 13, the clamping part 121 is formed on the outer peripheral edge of the inner cylinder and is arranged in described in two
Between limiting section 131, the extending port 133 is the through-hole through the outer barrel 13.
The flaring tooth 11 includes extending and inserting with the connecting portion 111 of 12 activity of inner cylinder and from the connecting portion 111
Enter the expansion mouth 112 of the extending port 133.
The inner cylinder 12 and the outer barrel 13 are the hollow cylinder with central shaft；The inner cylinder 12 and the outer barrel 13 pass through
Reversely coaxial rotation in the limiting section 131 and the clamping part 121 and the long range of circular arc between two limiting sections 131
Turn；Specifically, the length of circular arc string is less than the length of the expansion mouth 112 between two limiting sections 131.
By the relative rotation of the inner cylinder 12 and the outer barrel 13, the expansion mouth 112 is along 133 direction of extending port
It stretches out and shrinks.
The limiting section 131 is formed in same level with the clamping part 121.
The outer barrel 13 is integrally formed；The inner cylinder 12 is integrally formed.
Hinge 14 is further included, the hinge 14 connects the flaring tooth 11 and the inner cylinder 12.
In the present embodiment, in figure 3, drilling rod drives the inner cylinder 12 to rotate counterclockwise, and the outer barrel 13 is by described
Clamping part 121 rotates clockwise in the long range of circular arc between two limiting sections 131；Cause 112 edge of expansion mouth
It shrinks in 133 direction of extending port.
In Fig. 4, drilling rod drives the inner cylinder 12 to rotate clockwise, and the outer barrel 13 is by the clamping part 121 two
It is rotated counterclockwise in the long range of circular arc between a limiting section 131；Cause the expansion mouth 112 along the extending port 133
It shrinks in direction.
The drilling rod 2 further includes sequentially connected ontology 22, blocking circle 23 and borded pile 24, and the borded pile 24 is described in
Drill bit 21 extends to form, and the ontology 22, blocking circle 23, borded pile 24 and drill bit 21 are set with central shaft, the blocking circle 23
Internal diameter be more than the borded pile 24 and the ontology 2, and 241 depth of screw thread for being surrounded on 24 outer wall of borded pile is more than institute
State the screw thread 231 of blocking 23 outer walls of circle.
Further, the screw thread of 231 weeks diameters of screw thread of 23 outer walls of the blocking circle and 241 outer wall of borded pile 241 weeks
Diameter is identical.The structure ensure that drilling tool 100 during piling, it is described blocking circle 23 structures to it is squeezed into stake hole wall into
Second of extruding of row, blocking formation of pile soil are not screwed out directly squeezed pile.
Preferably, the height ratio preferably 7 of the blocking circle 23 and borded pile 24:25, actual size requirement, the blocking
For the height of circle 23 for 70cm, the height of the borded pile 24 is 250cm, both may insure it is squeezed into stake holes depth meet and set
Meter requirement, at the same also ensure that borded pile 24 to it is squeezed into the hole wall of stake carry out second and squeeze, blocking formation of pile soil is not
Screwed out directly squeezed pile.
Referring to Fig. 1, the present invention also provides the earth-squeezing hole-enlarging stake 300 that a kind of application drilling tool 100 construction is completed, it is described
Earth-squeezing hole-enlarging stake 300 includes soil compaction portion 3 and the reamer 4 positioned at 3 bottom of soil compaction portion, and the soil compaction portion 3 includes pile foundation 31 and fills out
Fill the concrete-pile ontology 32 in pile foundation 31.
The pile foundation 31 includes the soil compaction layer 311 positioned at its inner peripheral, the internal thread for being formed in 311 inner wall of soil compaction layer
313。
The concrete-pile ontology 32 includes the external screw thread 321 for being formed in its outer wall, the internal thread 313 and the outer spiral shell
Line 321 is spirally connected.
The reamer 4 includes the pile foundation head 41 extended to form from 31 bottom of pile foundation, is covered in the pile foundation head 41
The grout layer 42 of inner wall, the concrete pile head 43 being filled in the grout layer 42.
In the present embodiment, the concrete-pile ontology 32 and the integrated form of the concrete pile head 43.
The present invention also provides a kind of construction methods of above-mentioned earth-squeezing hole-enlarging stake 300, include the following steps：
(1), the drilling tool of tool blocking circle is provided, rotates in the forward direction using the drilling tool and drills to soil, the drilling tool exists
The inner wall for forming pile foundation forms soil compaction layer；
(2), when the drilling depth of the drilling tool reaches the predetermined depth of pile foundation, stop the drilling tool；
(3), the drilling tool further includes the enlarged footing positioned at its bottom, the enlarged footing tool flaring tooth and extending port, passes through
The drilling rod drives the enlarged footing to reversely rotate, and the flaring tooth stretches out outward across the extending port, passes through the expansion
Ability to speak is enlarged pile foundation bottom, after forming pile foundation head, stops the drilling tool；
(4), the enlarged footing is driven to rotate in the forward direction again, the flaring tooth is made to be stretched into inwardly simultaneously across the extending port
After being contained in the extending port, stop the drilling tool；
(5), whitewashing is carried out to the inner wall of pile foundation head and forms grout layer；
(6), after the completion of whitewashing, by drilling tool, spiral shell goes out out of pile foundation, while successively to concrete perfusion in pile foundation head and pile foundation；
(7), the outer wall for stopping circle includes external screw thread, and the external screw thread is outside the soil compaction layer inner wall forms and is described
The internal thread of screw thread engagement；
(8), in the pile foundation while concrete perfusion to concrete perfusion in the internal thread, complete the soil compaction and expand
Hole stake.
The beneficial effects of the present invention are：Increase blocking coil structures, blocking circle to it is squeezed into the hole wall of stake carry out
Second of extruding, blocking formation of pile soil are not screwed out directly squeezed pile, and structure novel, pile quality are good, are not easy bit bouncing；
Inter-pile soil body has layer compaction effect, and pile bearing capacity is high, and the environment of surrounding will not be also contaminated；And it will be enlarged by head to be set as
Flaring tooth is set on inner cylinder, and using the rotation of the enlarged footing by the double-layer structure of inner cylinder and outer barrel, and control flaring tooth is stretched
Go out and shrink, complete the flaring to different soil properties, the structure design is simple, at low cost, effect is good, suitable for producing in batches and promote
It uses.
Above-described is only embodiments of the present invention, it should be noted here that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to the protection model of the present invention
It encloses.
Claims (7)
1. a kind of drilling tool, it is characterised in that：Including having the drilling rod of drill bit and being sheathed on the enlarged footing of the drill bit, the enlarged footing
Including flaring tooth, inner cylinder and the outer barrel for being sheathed on inner cylinder, and the inner cylinder and the outer barrel are arranged at intervals, and the inner cylinder includes card
Buckle, the outer barrel include limiting section and extending port, and the limiting section quantity is two and interval is formed in the interior of the outer barrel
On periphery, the clamping part is formed on the outer peripheral edge of the inner cylinder and is arranged between two limiting sections, the stretching
Mouth is the through-hole through the outer barrel, and the flaring tooth includes extending with the connecting portion of inner cylinder activity and from the connecting portion
And it is inserted into the expansion mouth of the extending port；
The drilling rod further includes sequentially connected ontology, blocking circle and borded pile, the borded pile and is extended to form from the drill bit,
The ontology, blocking circle, borded pile and drill bit are set with central shaft, the internal diameter of the blocking circle be more than the borded pile with it is described
Ontology, and the depth of thread for being surrounded on the spiral column outer wall is more than the screw thread of the blocking ring outer wall.
2. drilling tool according to claim 1, it is characterised in that：The screw thread Zhou Jing and the borded pile of the blocking ring outer wall
The screw thread week diameter of outer wall is identical.
3. drilling tool according to claim 1, it is characterised in that：The inner cylinder and the outer barrel are the open circles with central shaft
Cylinder.
4. drilling tool according to claim 2, it is characterised in that：The inner cylinder and the outer barrel pass through the limiting section and institute
State reversed coaxial rotating in clamping part and the long range of circular arc between two limiting sections.
5. drilling tool according to claim 2, it is characterised in that：The length of circular arc string is less than institute between two limiting sections
State the length of expansion mouth.
6. drilling tool according to claim 1, it is characterised in that：Pass through the relative rotation of the inner cylinder and the outer barrel, institute
Expansion mouth is stated to stretch out and shrink along the extending port direction.
7. drilling tool according to claim 1, it is characterised in that：The limiting section is formed in same level with the clamping part
Face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362530.XA CN106049463B (en) | 2016-05-27 | 2016-05-27 | The construction method and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362530.XA CN106049463B (en) | 2016-05-27 | 2016-05-27 | The construction method and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106049463A CN106049463A (en) | 2016-10-26 |
| CN106049463B true CN106049463B (en) | 2018-07-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610362530.XA Active CN106049463B (en) | 2016-05-27 | 2016-05-27 | The construction method and its drilling tool of a kind of earth-squeezing hole-enlarging stake and the earth-squeezing hole-enlarging stake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106049463B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252298B (en) * | 2018-01-19 | 2019-09-10 | 河海大学 | A kind of reexpansion stake and its construction method |
| CN109695245B (en) * | 2019-01-17 | 2023-12-08 | 福建省大地管桩有限公司 | Pile discharging method for double-cylinder hammer-free pipe pile |
| CN110359853B (en) * | 2019-07-13 | 2021-07-09 | 江龙 | Self-adaptive semi-squeezing soil drill and pile-forming construction method of foundation pile thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106187A (en) * | 1985-05-31 | 1987-02-18 | 东京制作所(株式会社) | Stake hole bucket and method for digging thereof that the bottom reaming is used |
| JPH06173254A (en) * | 1992-07-02 | 1994-06-21 | Mitani Sekisan Co Ltd | Concrete pile installation method in hollow excavation method, and excavation device, veneering device and excavating blade in hollow excavation method |
| CN2744822Y (en) * | 2004-10-29 | 2005-12-07 | 辽河石油勘探局 | Safety locking device for hole-enlarging tool for drilling |
| CN102505919A (en) * | 2011-12-29 | 2012-06-20 | 山河智能装备股份有限公司 | Bearizing drilling bit |
| CN103670283A (en) * | 2013-12-30 | 2014-03-26 | 中铁二十四局集团有限公司 | Transverse-broaching device |
| CN205778549U (en) * | 2016-05-27 | 2016-12-07 | 刘录怀 | A kind of earth-squeezing hole-enlarging stake drilling tool |
-
2016
- 2016-05-27 CN CN201610362530.XA patent/CN106049463B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106187A (en) * | 1985-05-31 | 1987-02-18 | 东京制作所(株式会社) | Stake hole bucket and method for digging thereof that the bottom reaming is used |
| JPH06173254A (en) * | 1992-07-02 | 1994-06-21 | Mitani Sekisan Co Ltd | Concrete pile installation method in hollow excavation method, and excavation device, veneering device and excavating blade in hollow excavation method |
| CN2744822Y (en) * | 2004-10-29 | 2005-12-07 | 辽河石油勘探局 | Safety locking device for hole-enlarging tool for drilling |
| CN102505919A (en) * | 2011-12-29 | 2012-06-20 | 山河智能装备股份有限公司 | Bearizing drilling bit |
| CN103670283A (en) * | 2013-12-30 | 2014-03-26 | 中铁二十四局集团有限公司 | Transverse-broaching device |
| CN205778549U (en) * | 2016-05-27 | 2016-12-07 | 刘录怀 | A kind of earth-squeezing hole-enlarging stake drilling tool |
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| Publication number | Publication date |
|---|---|
| CN106049463A (en) | 2016-10-26 |
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Effective date of registration: 20210714 Address after: 721499 in Donghu Hotel, north section of Donghu Road, Fengxiang County, Baoji City, Shaanxi Province Patentee after: Fengxiang posent northwest Geotechnical Engineering Co.,Ltd. Address before: 056 Donghu Road, Chengguan Town, Fengxiang County, Baoji City, Shaanxi Province Patentee before: Liu Luhuai |