CN107355188B - A kind of cannulated threaded shape drill bit and its application method suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation - Google Patents
A kind of cannulated threaded shape drill bit and its application method suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation Download PDFInfo
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- CN107355188B CN107355188B CN201710593775.8A CN201710593775A CN107355188B CN 107355188 B CN107355188 B CN 107355188B CN 201710593775 A CN201710593775 A CN 201710593775A CN 107355188 B CN107355188 B CN 107355188B
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- rod
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 222
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000010412 perfusion Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- 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
- 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
- E02D5/72—Pile shoes
-
- 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
-
- 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/043—Threaded with locking means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
Invention provides a kind of cannulated threaded shape drill bit and its application method suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation.The cannulated threaded shape drill bit includes shoe, cannulated threaded drilling rod I, several section cannulated threaded drilling rods II, several annular stirrups and several pins.When work, I lower end of cannulated threaded drilling rod is connect with shoe, and upper end is connect with cannulated threaded drilling rod II or drilling machine rotation driving section.The lower end of each cannulated threaded drilling rod II is connect with cannulated threaded drilling rod I or adjacent hollow threaded drillpipe II, and upper end is connect with adjacent hollow threaded drillpipe II or drilling machine rotation driving section.The application method of the cannulated threaded shape drill bit includes fixed shoe, installation cannulated threaded drilling rod I, drilling, reversely rotates promotion drill bit.Phenomena such as cannulated threaded shape drill bit avoids brill risk, collapse hole, shrinkage cavity are less prone in construction, screw rod pile construction quality can guarantee, the construction especially suitable for soft foundation screw rod pile.
Description
Technical field
The present invention relates to construction tool fields, more particularly to a kind of cannulated threaded shape drill bit of extensible.
Background technique
Screw rod pile is compared with conventional straight-bar stake, under pile body cross-sectional area and the identical situation of length, the stake side of screw rod pile
Area is much bigger, and the bearing capacity that pile side friction is capable of providing is also just much bigger, so that the bearing capacity of screw rod pile is greater than often
Advise straight-bar stake, thus the favor by engineering circles and academia.
When stratum is soft, be easy to appear collapse hole, shrinkage cavity in screw rod pile drilling construction phenomena such as when, the construction technology of threaded rod
Usually are as follows: hollow screw drill bit is first pierced underground predetermined depth with drilling machine, then reinforcing bar and perfusion coagulation are installed in drill bit
Soil finally reversely rotates promotion drill bit to ground and forms screw rod pile.In this construction technology, the cannulated threaded shape for piercing underground is bored
Head plays the role of retaining wall simultaneously in the work progress such as drilling and forming hole, reinforcement installation and filling concrete, can avoid collapse hole, contracting
The construction quality of the generation of phenomena such as hole, screw rod pile is guaranteed.
Although the advantages of this screw rod pile constructing process be it will be apparent that its deficiency be also it is outstanding, deficiency is main
It is embodied in two aspects: first is that since the cannulated threaded shape drill bit of use cannot be replaced in construction or spreading, so that construction
In screw rod pile length cannot be lengthened according to actual formation situation；Second is that limitation or construction area due to drill height
The length of the reasons such as the limitation of space especially head room, the cannulated threaded shape drill bit actually used in engineering can not very
It is long, it cannot achieve the construction of overlength screw rod pile.
Summary of the invention
The object of the present invention is to provide a kind of cannulated threaded shape drill bits suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation
And its application method, to solve problems of the prior art.
To realize the present invention purpose and the technical solution adopted is that such, one kind being suitable for the cast-in-place overlength screw rod of soft foundation
The cannulated threaded shape drill bit of pile driving construction, comprising: shoe, cannulated threaded drilling rod I, several section cannulated threaded drilling rods II, several annulars
Stirrup and several pins.
The shoe includes boots body and the boots point that boots body bottom is arranged in.The boots are as a cylindrical body.The boots
A sharp generally cone.The boots point includes top surface and side.The top surface and the bottom surface of boots body are affixed.The boots point exists
Top surface and boots body intersection are provided with annular groove.Sealing ring is installed in the annular groove.It is additionally provided on the top surface
At least two convex block.Helical blade is provided on the side.
The hollow cylinder of the cannulated threaded drilling rod I generally upper and lower side opening.I lower end of cannulated threaded drilling rod is set
It is equipped with several grooves.I upper end of cannulated threaded drilling rod has external screw thread.The cannulated threaded drilling rod I is arranged at screw thread
There is at least two radial through-hole I.Helical blade is provided on the outer circle wall of the cannulated threaded drilling rod I.
The hollow cylinder of the cannulated threaded drilling rod II generally upper and lower side opening.About the II cannulated threaded drilling rod
End all has external screw thread.The cannulated threaded drilling rod II is each provided at least two radial through-hole II at screw thread at two.In described
Helical blade is provided on the outer circle wall of empty threaded drillpipe II.
The annular stirrup has the internal screw thread to match with cannulated threaded drilling rod I and II external screw thread of cannulated threaded drilling rod.
The annular stirrup is provided with two rows of radial through-hole III to match with radial through-hole I and radial through-hole II.
When work, I lower end of cannulated threaded drilling rod is connect with shoe, and upper end and cannulated threaded drilling rod II or drilling machine rotate
Drive part connection.The lower end of each cannulated threaded drilling rod II and cannulated threaded drilling rod I or adjacent hollow threaded drillpipe II connect
It connects, upper end is connect with adjacent hollow threaded drillpipe II or drilling machine rotation driving section.The cannulated threaded drilling rod I is constituted with shoe
It is mating.The boots body is inserted into the lower end opening of cannulated threaded drilling rod I.The convex block is fitted into respective slot.Institute
Annular stirrup is stated to be removably attachable to cannulated threaded drilling rod II and adjacent cannulated threaded drilling rod I or cannulated threaded drilling rod II
Together.The lower end that the upper end of the cannulated threaded drilling rod I or cannulated threaded drilling rod II screws in annular stirrup is open, adjacent hollow spiral shell
The upper end that the lower end of line drilling rod II screws in annular stirrup is open.The pin sequentially passes through radial through-hole III and corresponding radial direction is logical
Hole I or radial through-hole II.
Further, the outer wall of the cannulated threaded drilling rod I, cannulated threaded drilling rod II and annular stirrup is provided with symmetrical card
Slot.The symmetrical card slot of the cannulated threaded drilling rod I is arranged below external screw thread.The symmetrical card slot of the cannulated threaded drilling rod II is set
It sets below upper external screw thread.
Invention additionally discloses a kind of about the above-mentioned cannulated threaded shape brill suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation
The application method of head, comprising the following steps:
1) shoe is fixed at stake position.
2) cannulated threaded drilling rod I is installed.Wherein, the lower end of the cannulated threaded drilling rod I is connect with shoe, upper end and drilling machine
Rotation driving section connection.
3) cannulated threaded drilling rod I and shoe are pierced into underground using drilling machine.
4) after cannulated threaded drilling rod I is drilled into predetermined depth, disassembly I upper end of cannulated threaded drilling rod and drilling machine rotary driving part
The connection divided.And one section cannulated threaded drilling rod II is connected with the cannulated threaded drilling rod I for piercing underground using annular stirrup and pin
It is connected together.Wherein, the lower end of the cannulated threaded drilling rod II is connect with the upper end of cannulated threaded drilling rod I, and upper end and drilling machine revolve
Turn drive part connection.
5) continue the cannulated threaded drilling rod II having connected, cannulated threaded drilling rod I and shoe to pierce underground using drilling machine.
6) after cannulated threaded drilling rod II is drilled into predetermined depth, disassembly II upper end of cannulated threaded drilling rod and drilling machine rotation are driven
Partial connection.And another section cannulated threaded drilling rod II is bored with the cannulated threaded for having been drilled into underground using annular stirrup and pin
Bar II links together.Wherein, the lower end for the cannulated threaded drilling rod II newly installed and the cannulated threaded drilling rod II for having been drilled into underground
Upper end connection, upper end is connect with drilling machine rotation driving section.
7) step 5) and step 6) are repeated, until depth >=design screw rod pile length of construction drill.Wherein, it has bored
The inner cavity of the cannulated threaded drilling rod I and cannulated threaded drilling rod II that enter underground collectively constitutes a vertical cavity.
8) connection of top cannulated threaded drilling rod II upper end and drilling machine rotation driving section is dismantled.It is described perpendicular in step 7)
Reinforcing bar or steel reinforcement cage, and perfusion mortar or concrete are installed into cavity.
9) rotation driving section of the upper end of top cannulated threaded drilling rod II and drilling machine is reconnected, reverse rotation mentions
Drill bit is risen, until top cannulated threaded drilling rod II is all promoted to ground or is above the ground level.
10) the cannulated threaded drilling rod II for being promoted to ground is removed.
11) step 9) and step 10) are repeated, until the cannulated threaded drilling rod II for piercing underground is all removed.
12) cannulated threaded drilling rod I is promoted to ground and removed.
Further, also there is cleaning drilling tool after step 12) and arranges the correlation step of component.
The solution have the advantages that unquestionable:
A. during reversely rotating promotion threaded drillpipe, each link position for saving cannulated threaded drilling rod cannot disconnect, and keep away
Exempt to fall to bore risk；
B. all processes of the cannulated threaded bar drill bar in constructions such as screw rod pile pore-forming drilling, reinforcement installation, filling concretes
In phenomena such as playing the role of retaining wall, collapse hole, shrinkage cavity are less prone in construction, screw rod pile construction quality can guarantee, especially suitable
Construction for soft foundation screw rod pile；
C. cannulated threaded bar drill bar can the spreading in construction as needed, suitable for the construction of overlength screw rod pile, by drilling machine
Highly, the influence of the factors such as construction site is smaller.
D. shoe and cannulated threaded drilling rod contact position are equipped with ring type seal, can effectively prevent underground water, soil in construction
Body etc. enters inside cannulated threaded drilling rod, it is advantageously ensured that the construction quality of screw rod pile.
Detailed description of the invention
Fig. 1 is shoe cross-sectional view；
Fig. 2 is boots point top view；
Fig. 3 is I structural schematic diagram of cannulated threaded drilling rod；
Fig. 4 is I front view of cannulated threaded drilling rod；
Fig. 5 is II structural schematic diagram of cannulated threaded drilling rod；
Fig. 6 is ring steel cuff structure schematic diagram；
Fig. 7 is II connection schematic diagram of cannulated threaded drilling rod I and cannulated threaded drilling rod；
Fig. 8 is II connection schematic diagram of cannulated threaded drilling rod II and cannulated threaded drilling rod
Fig. 9 is overall structure diagram.
In figure: shoe 1, boots body 101, boots point 102, top surface 1021, side 1022, annular groove 1023, convex block 1024, close
Seal 103, cannulated threaded drilling rod I 2, groove 201, radial through-hole I 202, cannulated threaded drilling rod II 3, radial through-hole II 301, ring
Shape stirrup 4, radial through-hole III 401, pin 5.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all include within the scope of the present invention.
Embodiment 1:
The present embodiment discloses a kind of cannulated threaded shape drill bit suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation, comprising:
Shoe 1, cannulated threaded drilling rod I 2, section cannulated threaded drilling rod II 3, annular stirrup 4 and pin 5.
Referring to Fig. 1 and Fig. 2, the shoe 1 includes boots body 101 and the boots point 102 that 101 bottom of boots body is arranged in.It is described
Boots body 101 is a cylindrical body.A boots point 102 generally cone.The bottom surface of this cone upward, vertex court
Under.The boots point 102 includes the bottom surface and the side 1022 i.e. side of cone that top surface 1021 is cone.The top surface 1021
It is affixed with the bottom surface of boots body 101.The boots point 102 is provided with annular groove 1023 in top surface 1021 and 101 intersection of boots body.Institute
It states and sealing ring 103 is installed in annular groove 1023.3 convex blocks 1024 are additionally provided on the top surface 1021.The convex block
1024 circumferential direction along top surface 1021 is evenly arranged.Helical blade is provided on the side 1022.In actual use, 1 quilt of shoe
After piercing underground predetermined depth, the pile top as screw rod pile is left in ground, without recycling.
Referring to Fig. 3 and Fig. 4, the hollow cylinder of the cannulated threaded drilling rod I 2 generally upper and lower side opening.It is described hollow
I 2 lower end of threaded drillpipe is provided with 3 grooves 201.I 2 upper end of cannulated threaded drilling rod has external screw thread.The cannulated threaded
Drilling rod I 2 is provided with 4 radial through-hole I 202 at screw thread.The radial through-hole is circumferentially uniformly distributed.The cannulated threaded drilling rod
Helical blade is provided on I 2 outer circle wall.
Referring to Fig. 5, the hollow cylinder of the cannulated threaded drilling rod II 3 generally upper and lower side opening.The cannulated threaded
II 3 upper and lower side of drilling rod all has external screw thread.The cannulated threaded drilling rod II 3 is each provided with 4 radial through-hole at screw thread at two
Ⅱ301.Helical blade is provided on the outer circle wall of the cannulated threaded drilling rod II 3.
Referring to Fig. 6, the annular stirrup 4 is the hollow cylinder of upper and lower side opening.It is described annular stirrup 4 have with it is hollow
The internal screw thread that threaded drillpipe I 2 and II 3 external screw thread of cannulated threaded drilling rod match.The annular stirrup 4 is provided with two rows of and radial
The radial through-hole III 401 that through-hole I 202 and radial through-hole II 301 match.
When work, I 2 lower end of cannulated threaded drilling rod is connect with shoe 1, upper end and cannulated threaded drilling rod II 3 or drilling machine
Rotation driving section connection.The lower end of each cannulated threaded drilling rod II 3 and cannulated threaded drilling rod I 2 or adjacent hollow threaded bore
Bar II 3 connects, and upper end is connect with adjacent hollow threaded drillpipe II 3 or drilling machine rotation driving section.Referring to Fig. 9, the hollow spiral shell
Line drilling rod I 2 constitutes mating with shoe 1.The boots body 101 is inserted into the lower end opening of cannulated threaded drilling rod I 2.It is described
Convex block 1024 is fitted into respective slot 201.Referring to figs. 7 and 8, the annular stirrup 4 by cannulated threaded drilling rod II 3 with it is adjacent
Cannulated threaded drilling rod I 2 or cannulated threaded drilling rod II 3 be removably attachable to together.The cannulated threaded drilling rod I 2 or hollow
The lower end that the upper end of threaded drillpipe II 3 screws in annular stirrup 4 is open, and the lower end of adjacent hollow threaded drillpipe II 3 screws in ring steel
The upper end of hoop 4 is open.The pin 5 sequentially passes through radial through-hole III 401 and corresponding radial through-hole I 202 or radial through-hole II
301。
In the present embodiment, the outer wall of the cannulated threaded drilling rod I 2, cannulated threaded drilling rod II 3 and annular stirrup 4 is all provided with
It is equipped with symmetrical card slot, with clamp fixed bottom boundary cannulated threaded drilling rod below when to mount and dismount cannulated threaded drilling rod.Institute
The symmetrical card slot for stating cannulated threaded drilling rod I 2 is arranged below external screw thread.The symmetrical card slot of the cannulated threaded drilling rod II 3 is arranged
Below upper external screw thread.
Embodiment 2:
The present embodiment discloses a kind of hollow suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation about described in embodiment 1
The application method of shape of threads drill bit, comprising the following steps:
1) shoe 1 is fixed at stake position.
2) cannulated threaded drilling rod I 2 is installed.Wherein, the lower end of the cannulated threaded drilling rod I 2 is connect with shoe 1, upper end with
The connection of drilling machine rotation driving section.
3) cannulated threaded drilling rod I 2 and shoe 1 are pierced into underground using the rotary driving force of drilling machine and vertical pressure.
4) when hollow threaded drillpipe I 2 wholly or largely pierces underground, and design has not yet been reached in the depth of construction drill
After when screw rod pile length, the connection of cannulated threaded drilling rod I 2 upper end and drilling machine rotation driving section is dismantled.And use annular stirrup 4
A section cannulated threaded drilling rod II 3 is linked together with the cannulated threaded drilling rod I 2 for piercing underground with pin 5.Wherein, in described
The lower end of empty threaded drillpipe II 3 is connect with the upper end of cannulated threaded drilling rod I 2, and upper end is connect with drilling machine rotation driving section.
5) continue the cannulated threaded drilling rod II 3 having connected, cannulated threaded drilling rod I 2 and shoe 1 to pierce ground using drilling machine
Under.
6) underground is wholly or largely pierced when the cannulated threaded drilling rod II 3 connecting with cannulated threaded drilling rod I 2, and
The depth of construction drill have not yet been reached design screw rod pile length when after, disassembly II 3 upper end of cannulated threaded drilling rod and drilling machine rotate
The connection of drive part.And it by another section cannulated threaded drilling rod II 3 and is had been drilled into underground using annular stirrup 4 and pin 5
Empty threaded drillpipe II 3 links together.Wherein, the lower end for the cannulated threaded drilling rod II 3 newly installed with have been drilled into the hollow of underground
The upper end of threaded drillpipe II 3 connects, and upper end is connect with drilling machine rotation driving section.
7) step 5) and step 6) are repeated, until depth >=design screw rod pile length of construction drill.At this point, having bored
The inner cavity of the cannulated threaded drilling rod I 2 and cannulated threaded drilling rod II 3 that enter underground collectively constitutes a vertical cavity.
8) connection of top cannulated threaded drilling rod II 3 upper end and drilling machine rotation driving section is dismantled.It is described in step 7)
Reinforcing bar or steel reinforcement cage, and perfusion mortar or concrete are installed in vertical cavity.
9) rotation driving section of the upper end of top cannulated threaded drilling rod II 3 and drilling machine is reconnected, is reversely rotated
Drill bit is promoted, using the reverse rotation driving force and vertical lifting power of drilling machine until all by top cannulated threaded drilling rod II 3
It is promoted to ground or is above the ground level.
10) the cannulated threaded drilling rod II 3 for being promoted to ground is removed.Pass through the card slot of annular stirrup 4 in using clamp
Cannulated threaded drilling rod II 3 in the fixed drilling of the card slot of empty threaded drillpipe II 3, opens II 3 upper end of cannulated threaded drilling rod and drilling machine
The connection of rotation driving section, release above II 3 lower end of cannulated threaded drilling rod in ground and lower section cannulated threaded drilling rod II 3 or in
The above cannulated threaded drilling rod II 3 in ground is removed in the connection of empty I 2 upper end of threaded drillpipe.
11) step 9) and step 10) are repeated, until the cannulated threaded drilling rod II 3 for piercing underground is all removed.
12) cannulated threaded drilling rod I 2 is promoted to ground and removed.
13) it cleans drilling tool and arranges component.
Claims (4)
1. a kind of cannulated threaded shape drill bit suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation characterized by comprising shoe
(1), cannulated threaded drilling rod I (2), several section cannulated threaded drilling rods II (3), several annular stirrups (4) and several pins (5)；
The shoe (1) includes that the boots of boots body (101) and setting in boots body (101) bottom are sharp (102)；The boots body (101)
For a cylindrical body；Sharp (102) the generally cone of the boots；The boots sharp (102) include top surface (1021) and side
(1022)；The top surface (1021) and the bottom surface of boots body (101) are affixed；The boots sharp (102) are in top surface (1021) and boots body
(101) intersection is provided with annular groove (1023)；Sealing ring (103) are installed in the annular groove (1023)；The top
At least two convex block (1024) are additionally provided on face (1021)；Helical blade is provided on the side (1022)；
The hollow cylinder of the cannulated threaded drilling rod I (2) generally upper and lower side opening；Cannulated threaded drilling rod I (2) lower end
It is provided with several grooves (201)；Cannulated threaded drilling rod I (2) upper end has external screw thread；The cannulated threaded drilling rod I (2)
At least two radial through-hole I (202) is provided at screw thread；Spiral shell is provided on the outer circle wall of the cannulated threaded drilling rod I (2)
Vane piece；
The hollow cylinder of the cannulated threaded drilling rod II (3) generally upper and lower side opening；On the cannulated threaded drilling rod II (3)
Lower end all has external screw thread；The cannulated threaded drilling rod II (3) is each provided at least two radial through-hole II at screw thread at two
(301)；Helical blade is provided on the outer circle wall of the cannulated threaded drilling rod II (3)；
The annular stirrup (4) is interior with matching with cannulated threaded drilling rod I (2) and cannulated threaded drilling rod II (3) external screw thread
Screw thread；It is logical that the annular stirrup (4) is provided with two rows of radial directions to match with radial through-hole I (202) and radial through-hole II (301)
Hole III (401)；
When work, cannulated threaded drilling rod I (2) lower end is connect with shoe (1), upper end and cannulated threaded drilling rod II (3) or brill
The connection of machine rotation driving section；The lower end of each cannulated threaded drilling rod II (3) and cannulated threaded drilling rod I (2) or adjacent hollow
Threaded drillpipe II (3) connection, upper end is connect with adjacent hollow threaded drillpipe II (3) or drilling machine rotation driving section；It is described hollow
Threaded drillpipe I (2) constitutes mating with shoe (1)；The lower end that the boots body (101) is inserted into cannulated threaded drilling rod I (2) is spacious
In mouthful；The convex block (1024) is fitted into respective slot (201)；It is described annular stirrup (4) by cannulated threaded drilling rod II (3) with
Adjacent cannulated threaded drilling rod I (2) or cannulated threaded drilling rod II (3) is removably attachable to together；The cannulated threaded drilling rod I
(2) or the lower end of the annular stirrup (4) of the upper end of cannulated threaded drilling rod II (3) screw-in is open, adjacent hollow threaded drillpipe II (3)
The upper end that lower end screws in annular stirrup (4) is open；The pin (5) sequentially passes through radial through-hole III (401) and corresponding radial direction
Through-hole I (202) or radial through-hole II (301).
2. a kind of cannulated threaded shape drill bit suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation according to claim 1,
It is characterized by: the outer wall of the cannulated threaded drilling rod I (2), cannulated threaded drilling rod II (3) and annular stirrup (4) is provided with
Symmetrical card slot；The symmetrical card slot of the cannulated threaded drilling rod I (2) is arranged below external screw thread；The cannulated threaded drilling rod II (3)
Symmetrical card slot be arranged below upper external screw thread.
3. a kind of make about the cannulated threaded shape drill bit for being suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation described in claim 1
With method, which comprises the following steps:
1) shoe (1) is fixed at stake position；
2) cannulated threaded drilling rod I (2) are installed；Wherein, the lower end of the cannulated threaded drilling rod I (2) is connect with shoe (1), upper end
It is connect with drilling machine rotation driving section；
3) cannulated threaded drilling rod I (2) and shoe (1) are pierced into underground using drilling machine；
4) after cannulated threaded drilling rod I (2) is drilled into predetermined depth, disassembly cannulated threaded drilling rod I (2) upper end and drilling machine rotation are driven
Partial connection；And using annular stirrup (4) and pin (5) by a section cannulated threaded drilling rod II (3) with pierce the hollow of underground
Threaded drillpipe I (2) links together；Wherein, the lower end of the cannulated threaded drilling rod II (3) and cannulated threaded drilling rod I (2) is upper
End connection, upper end is connect with drilling machine rotation driving section；
5) continue the cannulated threaded drilling rod II (3) having connected, cannulated threaded drilling rod I (2) and shoe (1) to pierce ground using drilling machine
Under；
6) after cannulated threaded drilling rod II (3) is drilled into predetermined depth, disassembly cannulated threaded drilling rod II (3) upper end and drilling machine rotation are driven
The connection of dynamic part；And by another section cannulated threaded drilling rod II (3) and underground is had been drilled into using annular stirrup (4) and pin (5)
Cannulated threaded drilling rod II (3) link together；Wherein, the lower end for the cannulated threaded drilling rod II (3) newly installed and have been drilled into ground
Under cannulated threaded drilling rod II (3) upper end connection, upper end is connect with drilling machine rotation driving section；
7) step 5) and step 6) are repeated, until depth >=design screw rod pile length of construction drill；Wherein, have been drilled into ground
Under cannulated threaded drilling rod I (2) and the inner cavity of cannulated threaded drilling rod II (3) collectively constitute a vertical cavity；
8) connection of top cannulated threaded drilling rod II (3) upper end and drilling machine rotation driving section is dismantled；It is described perpendicular in step 7)
Reinforcing bar or steel reinforcement cage, and perfusion mortar or concrete are installed into cavity；
9) rotation driving section of the upper end of top cannulated threaded drilling rod II (3) and drilling machine is reconnected, reverse rotation mentions
Drill bit is risen, until top cannulated threaded drilling rod II (3) is all promoted to ground or is above the ground level；
10) the cannulated threaded drilling rod II (3) for being promoted to ground is removed；
11) step 9) and step 10) are repeated, until the cannulated threaded drilling rod II (3) for piercing underground is all removed；
12) cannulated threaded drilling rod I (2) is promoted to ground and removed.
4. the use of the cannulated threaded shape drill bit according to claim 3 suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation
Method, it is characterised in that: also there is cleaning drilling tool after step 12) and arrange the correlation step of component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593775.8A CN107355188B (en) | 2017-07-20 | 2017-07-20 | A kind of cannulated threaded shape drill bit and its application method suitable for the cast-in-place overlength screw rod pile driving construction of soft foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108018856A (en) * | 2017-11-30 | 2018-05-11 | 中国冶集团有限公司 | A kind of Novel spiral pile-driving machine and its construction method |
| CN109441366B (en) * | 2018-12-27 | 2023-09-26 | 河南理工大学 | Anchor cable complete drilling tool capable of rotating bidirectionally |
| CN111455991B (en) * | 2020-04-20 | 2021-06-01 | 华东交通大学 | Assembled spiral pile foundation and construction method thereof |
| CN111997045B (en) * | 2020-07-11 | 2021-09-21 | 中铁二十四局集团江苏工程有限公司 | Combined screw pile and using method thereof |
| US11454423B1 (en) * | 2021-03-31 | 2022-09-27 | Northern States Metals Company | Ground screw adaptor for solar panel support structure |
| CN115075257B (en) * | 2022-07-13 | 2023-09-08 | 中交二公局东萌工程有限公司 | Pile beam vertical anchor for deep foundation pit support of complex environment building and construction method thereof |
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