CN110130322A - A kind of base expanding and base expanding device and its construction method of Screw Pile - Google Patents
A kind of base expanding and base expanding device and its construction method of Screw Pile Download PDFInfo
- Publication number
- CN110130322A CN110130322A CN201910298470.3A CN201910298470A CN110130322A CN 110130322 A CN110130322 A CN 110130322A CN 201910298470 A CN201910298470 A CN 201910298470A CN 110130322 A CN110130322 A CN 110130322A
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- China
- Prior art keywords
- base expanding
- arm
- base
- rod
- driving motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—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
- E02D5/56—Screw piles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention discloses a kind of base expanding and base expanding device of Screw Pile and its construction methods, including pile crown and base expanding and base expanding arm, the lower surface Symmetrical vertical welding of the pile crown is equipped with side plate, is equipped with shaft between the adjacent side plate, the upper end of the base expanding and base expanding arm is rotatably arranged on the surface of shaft；The upper surface middle part of the pile crown is fixedly installed with driving motor；Pressure rod rotates one end by external force and base expanding and base expanding arm is driven to be swung, and finally struts the position of base expanding and base expanding arm, achievees the purpose that base expanding and base expanding, the size of base expanding and base expanding can be controlled, and convenient for normal recycling, there is good practicability；The inside of reinforcement block is arranged in by the first bar rotation for the upper end of push rod, when reinforcement block being facilitated to be moved downwards, it can be made to be rotated while one end of push rod can be driven to be moved downwards；When base expanding and base expanding arm is opened, the position of fender rod is left from the inside of sheath, and tension spring is connected with the baffle inside sheath, stability when being rotated after raising base expanding and base expanding arm base expanding and base expanding.
Description
Technical field
The present invention relates to Screw Pile technical field, the base expanding and base expanding device and its construction method of specially a kind of Screw Pile.
Background technique
Screw Pile is the structure form using variable cross-section, and the pore forming process Lateral soil body is squeezed, encryption effect, at
The part soil body forms screw thread after stake, and Pile side soil body forms nut；Stake base expanding and base expanding is the vertical bearing capacity and resistance to plucking in order to increase stake
Power；The ratio between enlarged base diameter and pile body diameter D/d, should be special according to requirement for bearing capacity and base expanding and base expanding end side surface and bearing course at pile end soil nature
Sign and base expanding and base expanding construction method determine.
Application No. is a kind of drilling rods for base expanding and base expanding screw thread pile driving construction that 201410784632 are proposed.It is described to be used for base expanding and base expanding
The drilling rod of screw thread pile driving construction includes: inner tube, outer tube, and the outer tube is set in outside said inner tube,；Wherein diamond piece is to be rotatably arranged on
The lower end of inner tube, due to having no any fastening structure between diamond piece and inner tube, causing diamond piece to be highly susceptible to external force influences and dissipates
Open, in addition, in soil layer, principle be by pushing bottom cover so that bottom cover is in contact with the surface convex portion of diamond piece, thus
It is flicked, achievees the effect that base expanding and base expanding, but the extended length of bottom cover institute is unable to control, and the size of base expanding and base expanding is caused to be unable to control,
Once and boss of the position of bottom cover beyond diamond piece, diamond piece can be moved back, cause normally withdraw after expanding stake
The case where bottom cover, limitation are fine；We provide the base expanding and base expanding device and its construction method of a kind of Screw Pile thus, above-mentioned to solve
The problem of being proposed in background technique.
Summary of the invention
The purpose of the present invention is to provide a kind of base expanding and base expanding device of Screw Pile and its construction methods, to solve above-mentioned background skill
The problem of being proposed in art.
The purpose of the present invention can be achieved through the following technical solutions: a kind of base expanding and base expanding device of Screw Pile, including pile crown with
Base expanding and base expanding arm, the lower surface Symmetrical vertical welding of the pile crown are equipped with side plate, are equipped with shaft, the base expanding and base expanding between the adjacent side plate
The upper end of arm is rotatably arranged on the surface of shaft；
The upper surface middle part of the pile crown is fixedly installed with driving motor, and the lower end of the driving motor is equipped with telescopic rod,
The lower end welding of the telescopic rod is equipped with reinforcement block, and the lower end rotation of the reinforcement block is equipped with push rod, and the lower end of the push rod turns
Dynamic to be equipped with connecting rod, the end welding of the connecting rod is equipped with pressure rod, and the side lower end of the nearly reinforcement block of the base expanding and base expanding arm rest is opened
Equipped with inside groove, the lower end of the pressure rod is rotatably arranged on the inside of inside groove；
Welding is equipped with connecting plate in the middle part of the western lower end of the side plate, and the lower end of the adjacent connecting plate is welded to each other setting,
The lower end welding of the connecting plate is equipped with stake bar, and the lower end welding of the stake bar is equipped with piled anchor.
Preferably, the lower end of the reinforcement block offers the first turn trough, and the internal symmetry of first turn trough is equipped with first
Bull stick, the upper end rotation of the push rod are set in the surface of the first bull stick.
Preferably, the lower end of the push rod offers the second turn trough, and the inner rotation of second turn trough is equipped with second turn
Bar, the connecting rod are located at the welding of one end inside the second turn trough and are equipped with change, and the change rotation is set in the second bull stick
Surface.
Preferably, the lower end welding of the base expanding and base expanding arm is equipped with fender rod, and the lower end welding of the connecting plate is equipped with sheath, institute
State the movable inside for being fastened on sheath in one end of fender rod.
Preferably, the middle part welding of the sheath is equipped with baffle, and the surface of the baffle is fixed with tension spring, the tension spring
One end be connected with one end of fender rod setting.
Preferably, the fender rod and sheath are the structure that cross sectional shape is arc, and the surface of sheath offers bar slot,
One end penetrating rod slot of fender rod simultaneously touches setting with the interior thereof of sheath.
Preferably, the stake bar is connected part with piled anchor equidistantly equipped with stiffener plate, and stiffener plate is cross sectional shape
For the metal plate-like structure of wedge shape.
A kind of construction method of the base expanding and base expanding device of Screw Pile, including the following steps:
Step 1: opening driving motor, the one end for making driving motor drive telescopic rod is moved up, and drives adjacent base expanding and base expanding
One end of arm is collapsed, until the direction of base expanding and base expanding arm is downwards；
Step 2: driving piled anchor drills, until reaching the drilling of predetermined depth；
Step 3: opening driving motor, the one end for making driving motor drive telescopic rod is moved down, and drives push rod downward
It is moved, push rod pushes the lower end of pressure rod to be rotated and base expanding and base expanding arm is driven to be swung at this time, so as to the one of base expanding and base expanding arm
End can reach deployed position；
Step 4: by driving pile crown, so that pile crown drives distracted base expanding and base expanding arm to be rotated on the surface of stake holes, so as to
The bottom end of stake holes forms threaded bore；
Step 5: opening driving motor, the one end for making driving motor drive telescopic rod is moved up, at this time the one of base expanding and base expanding arm
Until end contacts with each other along the lower end side that shaft rotate up to adjacent base expanding and base expanding arm, driving motor, and edge are closed at this time
Drilling take out pile crown, base expanding and base expanding arm is taken out from drilling；
Step 6: making it ultimately form base expanding and base expanding Screw Pile to the bore inner fill concrete being drilled.
Beneficial effects of the present invention:
1, pressure rod rotates one end by external force and base expanding and base expanding arm is driven to be swung, and finally by the position of base expanding and base expanding arm
It struts, achievees the purpose that base expanding and base expanding, compared with prior art, the size of base expanding and base expanding can be controlled, and convenient for normal recycling, be had very
Good practicability；
2, the inside of reinforcement block is arranged in by the first bar rotation for the upper end of push rod, and reinforcement block is facilitated to be moved downwards
When, it can be made to be rotated while one end of push rod can be driven to be moved downwards；
3, when base expanding and base expanding arm is opened, the position of fender rod is left from the inside of sheath, and the end of fender rod is equipped with tension spring,
Tension spring is connected with the baffle inside sheath, stability when being rotated after raising base expanding and base expanding arm base expanding and base expanding.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is club-footed pile rod structure schematic cross-sectional view in front of the present invention；
Fig. 3 is reinforcement block schematic structural cross-sectional view of the present invention；
Fig. 4 is protective frame schematic structural cross-sectional view of the present invention.
In figure: 1 pile crown, 11 side plates, 12 connecting plates, 13 sheaths, 131 tension springs, 132 baffles, 2 driving motors, 21 reinforcement blocks,
22 first bull sticks, 23 push rods, 231 second bull sticks, 3 pressure rods, 31 connecting rods, 311 changes, 4 base expanding and base expanding arms, 41 shafts, 42 inside grooves,
43 fender rods, 5 piled anchors, 51 bars, 52 stiffener plates.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-4 is please referred to, the present invention provides a kind of technical solution: a kind of base expanding and base expanding device of Screw Pile, including pile crown 1 and expansion
Base arm 4, the lower surface Symmetrical vertical welding of pile crown 1 are equipped with side plate 11, are equipped with shaft 41 between adjacent side plates 11, base expanding and base expanding arm 4
Upper end is rotatably arranged on the surface of shaft 41；
The upper surface middle part of pile crown 1 is fixedly installed with driving motor 2, and the lower end of driving motor 2 is equipped with telescopic rod, telescopic rod
Lower end welding be equipped with reinforcement block 21, reinforcement block 21 lower end rotation be equipped with push rod 23, push rod 23 lower end rotation be equipped with connection
The end welding of bar 31, connecting rod 31 is equipped with pressure rod 3, and base expanding and base expanding arm 4 offers inside groove 42 close to the side lower end of reinforcement block 21,
The lower end of pressure rod 3 is rotatably arranged on the inside of inside groove 42；In use, driving motor 2 is opened, so that the drive of driving motor 2 is stretched
One end of contracting bar is moved downwards, at this time drive reinforcement block 21 moved downwards, reinforcement block 21 downwards carry out move so that
Push rod 23 drive its lower end rotation setting connecting rod 31 rotated, have at this time with push rod 23 pressure rod 3 of certain angle by
One end is rotated to external force and base expanding and base expanding arm 4 is driven to be swung, and finally struts the position of base expanding and base expanding arm 4, reaches base expanding and base expanding
Purpose, compared with prior art, the size of base expanding and base expanding can be controlled, and convenient for normal recycling, there is good practicability；
Welding is equipped with connecting plate 12 in the middle part of the western lower end of side plate 11, and the lower end of adjacent connection plates 12 is welded to each other setting, even
The lower end welding of fishplate bar 12 is equipped with stake bar 51, and the lower end welding of stake bar 51 is equipped with piled anchor 5；Piled anchor 5 is moved downwards, make its
Drilling is formed in soil layer, facilitates 4 base expanding and base expanding of base expanding and base expanding arm.
Further, the lower end of reinforcement block 21 offers the first turn trough, and the internal symmetry of the first turn trough is equipped with the first bull stick
22, the upper end rotation of push rod 23 is set in the surface of the first bull stick 22；The upper end of push rod 23 passes through the rotation setting of the first bull stick 22
In the inside of reinforcement block 21, when reinforcement block 21 being facilitated to be moved downwards, one end of push rod 23 can be driven to carry out movement downwards
It can be made to be rotated simultaneously.
Further, the lower end of push rod 23 offers the second turn trough, and the inner rotation of the second turn trough is equipped with the second bull stick
231, connecting rod 31 is located at the welding of one end inside the second turn trough and is equipped with change 311, and the rotation of change 311 is set in the second bull stick
231 surface；Connecting rod 31 is rotatably arranged on the lower end of push rod 23 by change 311, when base expanding and base expanding arm 4 downwards when, connection
There is certain angle between bar 31 and push rod 23, when push rod 23 is moved downwards, facilitates push rod 23 that can drive connecting rod 31
It is moved.
Further, the lower end welding of base expanding and base expanding arm 4 is equipped with fender rod 43, and the lower end welding of connecting plate 12 is equipped with sheath 13,
The movable inside for being fastened on sheath 13 in one end of fender rod 43；, the middle part of sheath 13, which is welded, is equipped with baffle 132, baffle 132
Surface is fixed with tension spring 131, and one end of tension spring 131 is connected setting with one end of fender rod 43；Fender rod 43 is located at base expanding and base expanding
The lower end of arm 4, when base expanding and base expanding arm 4 is opened, the position of fender rod 43 is left from the inside of sheath 13, and the end of fender rod 43 is set
There is tension spring 131, tension spring 131 is connected with the baffle 132 inside sheath 13, steady when being rotated after raising 4 base expanding and base expanding of base expanding and base expanding arm
It is qualitative.
Further, fender rod 43 and sheath 13 are the structure that cross sectional shape is arc, and the surface of sheath 13 offers
Bar slot, one end penetrating rod slot of fender rod 43 simultaneously touch setting with the interior thereof of sheath 13；Convenient for protecting fender rod 43.
Further, stake bar 51 is connected part with piled anchor 5 equidistantly equipped with stiffener plate 52, and stiffener plate 52 is section
Shape is the metal plate-like structure of wedge shape；Improve the stability between stake bar 51 and piled anchor 5.
A kind of construction method of the base expanding and base expanding device of Screw Pile, including the following steps:
Step 1: opening driving motor 2, the one end for making driving motor 2 drive telescopic rod is moved up, and drives adjacent expansion
One end of base arm 4 is collapsed, until the direction of base expanding and base expanding arm 4 is downwards；
Step 2: driving piled anchor 5 drills, until reaching the drilling of predetermined depth；
Step 3: opening driving motor 2, the one end for making driving motor 2 drive telescopic rod is moved down, and drives push rod 23
It is moved downwards, push rod 23 pushes the lower end of pressure rod 3 to be rotated and base expanding and base expanding arm 4 is driven to be swung at this time, to expand
One end of base arm 4 can reach deployed position；
Step 4: by driving pile crown 1, so that pile crown 1 drives distracted base expanding and base expanding arm 4 to be rotated on the surface of stake holes,
So that the bottom end of stake holes forms threaded bore；
Step 5: opening driving motor 2, the one end for making driving motor 2 drive telescopic rod is moved up, at this time base expanding and base expanding arm 4
One end contact with each other along the lower end side that shaft 41 rotate up to adjacent base expanding and base expanding arm 4 until, close driving electricity at this time
Machine 2, and pile crown 1 is taken out along drilling, base expanding and base expanding arm 4 is taken out from drilling；
Step 6: making it ultimately form base expanding and base expanding Screw Pile to the bore inner fill concrete being drilled.
The working principle of the invention: opening driving motor 2, so that driving motor 2 drives one end of telescopic rod to carry out downwards
It is mobile, drive reinforcement block 21 to be moved downwards at this time, reinforcement block 21 carries out downwards mobile so that push rod 23 drives its lower end to turn
The connecting rod 31 of dynamic setting is rotated, and has the pressure rod 3 of certain angle to rotate one end by external force with push rod 23 at this time
And drive base expanding and base expanding arm 4 to be swung, and finally strut the position of base expanding and base expanding arm 4, achieve the purpose that base expanding and base expanding, with prior art phase
Than the size of base expanding and base expanding can be controlled, and convenient for normal recycling, have good practicability, fender rod 43 is located at base expanding and base expanding arm 4
Lower end, when base expanding and base expanding arm 4 is opened, the position of fender rod 43 is left from the inside of sheath 13, and the end of fender rod 43 is equipped with and draws
Spring 131, tension spring 131 are connected with the baffle 132 inside sheath 13, stability when being rotated after raising 4 base expanding and base expanding of base expanding and base expanding arm.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (8)
1. a kind of base expanding and base expanding device of Screw Pile, including pile crown (1) and base expanding and base expanding arm (4), which is characterized in that under the pile crown (1)
Symmetrical vertical welding in surface is equipped with side plate (11), is equipped with shaft (41) between the adjacent side plate (11), the base expanding and base expanding arm (4)
Upper end is rotatably arranged on the surface of shaft (41)；
The upper surface middle part of the pile crown (1) is fixedly installed with driving motor (2), and the lower end of the driving motor (2), which is equipped with, stretches
The lower end welding of contracting bar, the telescopic rod is equipped with reinforcement block (21), and the lower end rotation of the reinforcement block (21) is equipped with push rod (23),
The lower end rotation of the push rod (23) is equipped with connecting rod (31), and the end welding of the connecting rod (31) is equipped with pressure rod (3), institute
It states base expanding and base expanding arm (4) to offer inside groove (42) close to the side lower end of reinforcement block (21), the lower end of the pressure rod (3) rotates setting
In the inside of inside groove (42)；
Welding is equipped with connecting plate (12) in the middle part of the western lower end of the side plate (11), and the lower end of the adjacent connecting plate (12) is mutually welded
Setting is connect, the lower end welding of the connecting plate (12) is equipped with stake bar (51), and the lower end welding of the stake bar (51) is equipped with piled anchor
(5)。
2. a kind of base expanding and base expanding device of Screw Pile according to claim 1, which is characterized in that the lower end of the reinforcement block (21)
The first turn trough is offered, the internal symmetry of first turn trough is equipped with the first bull stick (22), and the upper end of the push rod (23) rotates
It is set in the surface of the first bull stick (22).
3. a kind of base expanding and base expanding device of Screw Pile according to claim 1, which is characterized in that open the lower end of the push rod (23)
Equipped with the second turn trough, the inner rotation of second turn trough is equipped with the second bull stick (231), and the connecting rod (31) is located at second turn
One end welding inside slot is equipped with change (311), and change (311) rotation is set in the surface of the second bull stick (231).
4. a kind of base expanding and base expanding device of Screw Pile according to claim 1, which is characterized in that the lower end of the base expanding and base expanding arm (4)
Welding is equipped with fender rod (43), and the lower end welding of the connecting plate (12) is equipped with sheath (13), one end of the fender rod (43)
The movable inside for being fastened on sheath (13).
5. a kind of base expanding and base expanding device of Screw Pile according to claim 4, which is characterized in that weld at the middle part of the sheath (13)
It is equipped with baffle (132), the surface of the baffle (132) is fixed with tension spring (131), one end of the tension spring (131) and anti-
One end of guard bar (43) is connected setting.
6. a kind of base expanding and base expanding device of Screw Pile according to claim 4, which is characterized in that the fender rod (43) and sheath
(13) be cross sectional shape be arc structure, the surface of sheath (13) offers bar slot, one end penetrating rod of fender rod (43)
Slot simultaneously touches setting with the interior thereof of sheath (13).
7. a kind of base expanding and base expanding device of Screw Pile according to claim 1, which is characterized in that the stake bar (51) and piled anchor
(5) it is connected part equidistantly equipped with stiffener plate (52), stiffener plate (52) is the metal plate-like knot that cross sectional shape is wedge shape
Structure.
8. a kind of construction method of the base expanding and base expanding device of Screw Pile according to claim 1 to 8, which is characterized in that
Including the following steps:
Step 1: opening driving motor (2), the one end for making driving motor (2) to drive telescopic rod is moved up, and drives adjacent expansion
One end of base arm (4) is collapsed, until the direction of base expanding and base expanding arm (4) is downwards；
Step 2: driving piled anchor (5) drills, until reaching the drilling of predetermined depth；
Step 3: opening driving motor (2), the one end for making driving motor (2) to drive telescopic rod is moved down, and drives push rod
(23) it is moved downwards, push rod (23) pushes the lower end of pressure rod (3) to be rotated and base expanding and base expanding arm (4) is driven to be put at this time
It is dynamic, so that one end of base expanding and base expanding arm (4) can reach deployed position；
Step 4: by driving pile crown (1), so that pile crown (1) drives distracted base expanding and base expanding arm (4) to be revolved on the surface of stake holes
Turn, so that the bottom end of stake holes forms threaded bore；
Step 5: opening driving motor (2), the one end for making driving motor (2) to drive telescopic rod is moved up, at this time base expanding and base expanding arm
(4) it until one end contacts with each other along the lower end side that shaft (41) rotate up to adjacent base expanding and base expanding arm (4), closes at this time
Driving motor (2), and pile crown (1) is taken out along drilling, base expanding and base expanding arm (4) is taken out from drilling；
Step 6: making it ultimately form base expanding and base expanding Screw Pile to the bore inner fill concrete being drilled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910298470.3A CN110130322B (en) | 2019-04-15 | 2019-04-15 | Bottom expanding device of threaded pile and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910298470.3A CN110130322B (en) | 2019-04-15 | 2019-04-15 | Bottom expanding device of threaded pile and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110130322A true CN110130322A (en) | 2019-08-16 |
| CN110130322B CN110130322B (en) | 2021-05-11 |
Family
ID=67569920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910298470.3A Active CN110130322B (en) | 2019-04-15 | 2019-04-15 | Bottom expanding device of threaded pile and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110130322B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678054A (en) * | 2012-05-16 | 2012-09-19 | 阜南县奋进机械制造有限公司 | Spirally bottom-expanding integrated drill bit |
| KR20130057161A (en) * | 2011-11-23 | 2013-05-31 | (주)삼일이엔씨 | Drilled hole enlargeable drill that scalable enlargement is possible in each drilling step |
| CN203403406U (en) * | 2013-08-23 | 2014-01-22 | 梁峰 | Tool-type spiral expansion head pull and press pile |
| CN106869797A (en) * | 2017-03-30 | 2017-06-20 | 中国五冶集团有限公司 | A kind of expanding method of the broaching equipment on construction site |
| CN107882510A (en) * | 2016-09-30 | 2018-04-06 | 上海城地建设股份有限公司 | A kind of boring drill bit device of reducing and construction method |
-
2019
- 2019-04-15 CN CN201910298470.3A patent/CN110130322B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130057161A (en) * | 2011-11-23 | 2013-05-31 | (주)삼일이엔씨 | Drilled hole enlargeable drill that scalable enlargement is possible in each drilling step |
| CN102678054A (en) * | 2012-05-16 | 2012-09-19 | 阜南县奋进机械制造有限公司 | Spirally bottom-expanding integrated drill bit |
| CN203403406U (en) * | 2013-08-23 | 2014-01-22 | 梁峰 | Tool-type spiral expansion head pull and press pile |
| CN107882510A (en) * | 2016-09-30 | 2018-04-06 | 上海城地建设股份有限公司 | A kind of boring drill bit device of reducing and construction method |
| CN106869797A (en) * | 2017-03-30 | 2017-06-20 | 中国五冶集团有限公司 | A kind of expanding method of the broaching equipment on construction site |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110130322B (en) | 2021-05-11 |
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