CN106987761A - A kind of preparation technology of spheroidal graphite cast-iron screw pile and the spheroidal graphite cast-iron screw pile prepared using the technique - Google Patents
A kind of preparation technology of spheroidal graphite cast-iron screw pile and the spheroidal graphite cast-iron screw pile prepared using the technique Download PDFInfo
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- CN106987761A CN106987761A CN201710373838.9A CN201710373838A CN106987761A CN 106987761 A CN106987761 A CN 106987761A CN 201710373838 A CN201710373838 A CN 201710373838A CN 106987761 A CN106987761 A CN 106987761A
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- extension tube
- guide pipe
- inverted cone
- shaped
- straight type
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- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 70
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 230000000630 rising effect Effects 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 41
- 229910052742 iron Inorganic materials 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 238000003763 carbonization Methods 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 3
- 238000009750 centrifugal casting Methods 0.000 claims description 3
- 229910001562 pearlite Inorganic materials 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 229910000975 Carbon steel Inorganic materials 0.000 description 5
- 239000010962 carbon steel Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000007531 graphite casting Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 229910019064 Mg-Si Inorganic materials 0.000 description 1
- 229910019406 Mg—Si Inorganic materials 0.000 description 1
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical group 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 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
- E02D5/56—Screw piles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1671—Shapes helical or spiral
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
- E02D2300/0031—Steel; Iron in cast iron form
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The spheroidal graphite cast-iron screw pile prepared the invention discloses a kind of preparation technology of spheroidal graphite cast-iron screw pile and using the technique, the spheroidal graphite cast-iron screw pile includes guide pipe, the lower end of the guide pipe has ramp type pinnacle, and at least two rotors for helically rising shape are sequentially provided with along the axis of the guide pipe.The tensile strength of the spheroidal graphite cast-iron screw pile of the present invention is not less than 420 500MPa, and elongation is not small by 7 10%, strong with corrosion resistance, the characteristics of service life is long.
Description
Technical field
The spheroidal graphite cast-iron spiral prepared the present invention relates to a kind of preparation technology of spheroidal graphite cast-iron screw pile and using the technique
Stake.
Spheroidal graphite cast-iron screw pile is mainly used in the basis of various equipment or component, it is not necessary to which live large area, which is excavated, makes mixed
Solidifying earth foundation, such as power Transmission shaft tower, street lamp and mark rod, solar components and various line holder bases, application field
It is boundless.
Background technology
At present, it is general that ground is excavated using large area in engineering foundation construction field, then make armored concrete conduct
The basis of various equipment or component, it is necessary to spend substantial amounts of man power and material, and construction period and concrete curing phase all very compared with
It is long.
The problem of in order to solve foundation construction difficulty, engineering time length and some narrow and small local construction areas, about several
Before 10 years, foreign countries have gradually used the screw pile of carbon steel material, and this screw pile is pressed it by engineering machinery in a spiral manner
Enter in soil, without suppressing or vibrating, without digging pit or drilling, it can also bent by monitoring in work progress
Line estimates bearing capacity in real time.In work progress, increase the length of screw pile according to field geology the thickness of the layer situation, to protect
Demonstrate,prove the bearing capacity of foundation pile.
This technology is widely adopted in engineering, when the screw pile of these carbon steel materials saves substantial amounts of in construction
Between, and many scenes for being difficult to construct also become to be easy to.
The component that screw pile can be welded into based on pedestal on chassis, with ground by ground above section as needed connects
Connect.
Due to the weakness of the corrosion-resistant of carbon steel, the problem of these piling bars for being inserted into underground are faced with corrosion and ageing,
Substantially reduce the service life of piling bar.
Because the strength ratio carbon steel of Nodular cast iron material is low, it is impossible to substitute carbon steel with common magnesium iron and be manufactured into screw pile.Cause
This, a kind of screw pile with high-strength ductile cast iron is urgently researched and developed.
The content of the invention
According to technical problem set forth above, and a kind of preparation technology of spheroidal graphite cast-iron screw pile is provided and the technique is used
The spheroidal graphite cast-iron screw pile of preparation.The technological means that the present invention is used is as follows：
A kind of preparation technology of spheroidal graphite cast-iron screw pile, with following steps：
Prepare before S1, casting stake：Dispensing, fusing, modulation treatment, the spheroidising of dispensing：
S11, the dispensing include following mass parts material for the raw material used：
Foundry iron is blast-melted：90-95 parts；
Steel scrap：5-10 parts；
S12, being molten into for the dispensing weigh raw material by the mass parts of each raw material in step S11, and melted, and such as adopt
With foundry iron and steel scrap, they are added in electric furnace together, fusing heating；If using blast-melted and steel scrap, first will
It is blast-melted to be added to when being warming up to 1350-1450 DEG C in electric furnace, then steel scrap is added in electric furnace heated up；
S13, the modulation treatment are the alloying element of addition adjustment hot metal composition in the molten iron obtained into step S12；
S14, the spheroidising are addition nodularization element in the molten iron obtained into step S13, and the nodularization element is
It is in spherical element to promote the graphite in process of setting；
S2, casting stake process：
The molten iron obtained in step S14 is poured into a mould by water-cooled metal mould centrifugal casting technique, matrix is obtained
For the cast blank pipe of spoken parts in traditional operas, inovulant is added while cast into molten iron；
S3, heat treatment, finishing processing：
Cast blank pipe is handled by high-temperature carbonization annealing, is obtained using matrix as the high-strength of ferrite and pearlite
Spend ductile iron pipe；Pipe after annealing obtains spheroidal graphite cast-iron screw pile product after finishing is handled,
The high-temperature carbonization annealing processing is that the cast blank pipe that will be obtained in S2 is heated to 900-950 DEG C, makes casting
Cementite is decomposed into graphite and ferrite in shell.
The finishing processing refers to the process such as product polishing, assembling and application.
The invention also discloses spheroidal graphite cast-iron prepared by a kind of preparation technology using a kind of above-mentioned spheroidal graphite cast-iron screw pile
Screw pile, the spheroidal graphite cast-iron screw pile includes guide pipe, and the lower end of the guide pipe has ramp type pinnacle, is oriented to along described
The axis of pipe is sequentially provided with least two rotors for helically rising shape.
The guide pipe is connected by welding or bolt with the rotor.
The guide pipe is straight type guide pipe or inverted cone-shaped guide pipe or special-shaped guide pipe, and the special-shaped guide pipe includes position
Straight type body and the tapered socket in portion disposed thereon in its underpart, middle part.
When the guide pipe is straight type guide pipe, the spheroidal graphite cast-iron screw pile also includes at least one straight type extension tube,
The straight type extension tube includes straight type pipe and is welded under the straight type adapter sleeve of the straight type pipe lower end, the straight type adapter sleeve
End has bellmouth, and the upper end of the straight type pipe has socket；
When the number of the straight type extension tube is equal to 1, the straight type guide pipe upper end and the bellmouth of straight type extension tube connect
Connect, and by bolt conjunction；
When the number of the straight type extension tube is more than 1, holding for straight type extension tube is saved in the straight type guide pipe upper end with first
Mouth connection, and by bolt closing, it is upper with being located at by the socket of the straight type extension tube positioned at bottom between adjacent straight type extension tube
The bellmouth connection of the straight type extension tube in portion, and by bolt conjunction.
The spheroidal graphite cast-iron screw pile total length (total length refer to cut off the unnecessary pipeline section in ground after length) be
The length of 1.5-30m, the straight type guide pipe and the straight type extension tube is 4-9m, and wall thickness is respectively 6-30mm；The straight type
The external diameter of guide pipe and the straight type pipe is equal, and the external diameter is 150-700mm；
The length of the straight type adapter sleeve is 400-1000mm, and wall thickness is 8-30mm；
The excircle configuration face of the rotor is than the high 100-800mm of outer wall of the straight type guide pipe, the thickness of the rotor
For 8-60mm.
When the guide pipe is inverted cone-shaped guide pipe, the upper end of the inverted cone-shaped guide pipe has bellmouth, the spheroidal graphite casting
Iron screw pile also includes at least one inverted cone-shaped extension tube, and the upper end of the inverted cone-shaped extension tube has bellmouth, and lower end, which has, inserts
Mouthful；
When the number of the inverted cone-shaped extension tube is equal to 1, bellmouth and the inverted cone-shaped of the inverted cone-shaped guide pipe prolong
The socket connection of long tube, and by bolt conjunction；
When the number of the inverted cone-shaped extension tube is more than 1, bellmouth and the head section inverted cone-shapeds of the inverted cone-shaped guide pipe prolong
The socket connection of long tube, and by bolt closing, by holding positioned at bottom inverted cone-shaped extension tube between adjacent inverted cone-shaped extension tube
Mouth is connected with the socket positioned at top inverted cone-shaped extension tube, and by bolt conjunction.
The spheroidal graphite cast-iron screw pile total length (total length refer to cut off the unnecessary pipeline section in ground after length) be
1.5-30m, the inverted cone-shaped guide pipe is identical with the taper of the inverted cone-shaped extension tube, and taper is 14-20：1000, length
It is 4-9m, wall thickness is 6-30mm；
The depth for the bellmouth that the socket of the first section inverted cone-shaped extension tube is inserted into the inverted cone-shaped guide pipe is more than or equal to
The internal diameter of the bellmouth of the inverted cone-shaped guide pipe；
In adjacent inverted cone-shaped extension tube, the socket of superposed inverted cone-shaped extension tube is inserted into the inverted cone-shaped positioned at bottom
The depth of the bellmouth of extension tube is more than or equal to the internal diameter of the bellmouth of the inverted cone-shaped extension tube positioned at bottom；
The excircle configuration face of the rotor is than the high 100-800mm of outer wall of the inverted cone-shaped guide pipe, the thickness of the rotor
Spend for 8-60mm；
The lower end diameter of the inverted cone-shaped guide pipe is 150-300mm；The lower end diameter of the inverted cone-shaped extension tube is
230-600mm。
When the guide pipe is special-shaped guide pipe；The spheroidal graphite cast-iron screw pile also includes at least one special-shaped extension tube,
There is tapered bellmouth, middle part there is straight type body, top to have tapered socket for the bottom of the special-shaped extension tube；
When the number of the special-shaped extension tube is equal to 1, the tapered socket of the special-shaped guide pipe and the special-shaped extension
The tapered bellmouth connection of pipe, and by bolt conjunction；
When the number of the special-shaped extension tube is more than 1, the tapered socket of the special-shaped guide pipe and the special-shaped extension of first section
The tapered bellmouth connection of pipe, and by bolt closing, by positioned at the special-shaped extension tube in bottom between the adjacent special-shaped extension tube
Tapered socket is connected with positioned at the tapered bellmouth of the special-shaped extension tube in top, and by bolt conjunction.
The spheroidal graphite cast-iron screw pile total length (total length refer to cut off the unnecessary pipeline section in ground after length) be
The length of 1.5-30m, the special-shaped guide pipe and the special-shaped extension tube is 4-9m, and the tapered of the special-shaped guide pipe inserts
The taper all same of mouth, the tapered bellmouth of the special-shaped extension tube and tapered socket, taper is 15-30：1000, taper length is equal
For 200-800mm, wall thickness is 6-30mm；Outer wall high 100- of the excircle configuration face of the rotor than the special-shaped guide pipe
800mm, the thickness of the rotor is 8-60mm.
The special-shaped guide pipe is identical with the diameter of the straight type body of special-shaped extension tube, diameter range 150-800mm.
Compared with prior art, the tensile strength of spheroidal graphite cast-iron screw pile of the invention is not less than 420-500MPa, elongation
The not small 7-10% of rate, service life long the characteristics of strong with corrosion resistance.
The present invention can be widely popularized in fields such as Building technologies for the foregoing reasons.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of spheroidal graphite cast-iron screw pile in embodiments of the invention 2.
Fig. 2 is the structural representation of straight type guide pipe in embodiments of the invention 2.
Fig. 3 is Fig. 2 top view.
Fig. 4 is the structural representation of straight type extension tube in embodiments of the invention 2.
Fig. 5 is the structural representation of inverted cone-shaped guide pipe in embodiments of the invention 3.
Fig. 6 is Fig. 5 top view.
Fig. 7 is the structural representation for the inverted cone-shaped extension tube being connected with inverted cone-shaped guide pipe in Fig. 5 in embodiments of the invention 3
Figure.
Fig. 8 is the structural representation for the inverted cone-shaped extension tube being connected with inverted cone-shaped extension tube in Fig. 7 in embodiments of the invention 3
Figure.
Fig. 9 is the structural representation of special-shaped guide pipe in embodiments of the invention 4.
Figure 10 is Fig. 9 top view.
Figure 11 is the structural representation of special-shaped extension tube in embodiments of the invention 4.
Embodiment
Embodiment 1
A kind of preparation technology of spheroidal graphite cast-iron screw pile, with following steps：
Prepare before S1, casting stake：Dispensing, fusing, modulation treatment, the spheroidising of dispensing：
S11, the dispensing include following mass parts material for the raw material used：
Foundry iron：90 parts；
Steel scrap：10 parts；
S12, being molten into for the dispensing weigh raw material by the mass parts of each raw material in step S11, and melted；
S13, the modulation treatment are the alloying element of addition adjustment hot metal composition in the molten iron obtained into step S12：
The composition in molten iron after C, Si, Mn, S, the modulation treatment is C：3.6%th, Si：2.5%th, Mn≤0.5%, S≤0.02%,
Surplus is Fe and inevitably micro-；
S14, the spheroidising are to use in the molten iron for pouring and obtaining in normal direction step S13 to add nodulizer, the ball
Agent is rare earth Mg-Si alloy, and the composition in molten iron after the spheroidising is C：3.6%th, Si：2.5%th, Mn≤0.5%, S
≤ 0.02%, Mg：0.04%, surplus is Fe and inevitably micro-；
S2, casting stake process：
The molten iron obtained in step S14 is poured into a mould by water-cooled metal mould centrifugal casting technique, matrix is obtained
For the cast blank pipe of spoken parts in traditional operas, inovulant is added while cast into molten iron, the addition of the inovulant is in step S14
The 0.1~0.25% of obtained molten steel quality；
S3, heat treatment, finishing processing：
Cast blank pipe is handled by high-temperature carbonization annealing, is obtained using matrix as the high-strength of ferrite and pearlite
Ductile iron pipe is spent, the body temperature control of high-temperature region is at 930 DEG C or so；Pipe after annealing obtains spheroidal graphite after finishing is handled
Cast iron screw pile product.
Embodiment 2
One factory building of infrastructure is made using the straight type screw pile of spheroidal graphite cast-iron.
As Figure 1-4, the ball that prepared by a kind of a kind of preparation technology of spheroidal graphite cast-iron screw pile described in use embodiment 1
Black cast iron screw pile, the spheroidal graphite cast-iron screw pile includes guide pipe, and the guide pipe is straight type guide pipe 1, and the straight type is led
There is ramp type pinnacle 1.1 to the lower end of pipe 1, the place plane on the ramp type pinnacle 1.1 and the angle of horizontal plane are 45 °,
The upper end of the straight type guide pipe 1 has provided with 4 bolts hole at socket 1.2, the socket 1.2 of the straight type guide pipe 1, along institute
The axis for stating straight type guide pipe 1 is sequentially provided with two rotors 2 for helically rising shape, and the number of turns of the rotor 2 is described equal to 1
The top 2.2 of rotor 2 is 150mm with the difference in height of terminal 2.1.
The straight type guide pipe 1 is connected by welding with the rotor 2.
The spheroidal graphite cast-iron screw pile also includes a straight type extension tube 3, and the straight type extension tube 3 includes straight type pipe 3.1
With the straight type adapter sleeve 3.2 for being welded on the straight type pipe lower end, the lower end of the straight type adapter sleeve 3.2 has bellmouth, described straight
Type adapter sleeve 3.2 has socket provided with 4 bolts hole, the upper end of the straight type pipe 3.1, and the socket of the straight type pipe 3.1 is provided with 4
Individual link bolt hole.Positioned at the socket 1.2 of the bolt hole and the straight type guide pipe 1 of the socket of the straight type adapter sleeve 3.2
After the bolt hole at place is overlapped, and by bolt conjunction.
The length of the straight type guide pipe 1 and the straight type extension tube 3 is 6000mm, and wall thickness is 6mm；The straight type is led
External diameter to pipe 1 and the straight type pipe 3.1 is equal, and the external diameter is 222mm；
The length of the straight type adapter sleeve 3.2 is 400mm, and wall thickness is 8mm, and external diameter is 240mm；
The excircle configuration face of the rotor 2 is than the high 350mm of outer wall of the straight type guide pipe 1, and the thickness of the rotor 2 is
10mm。
On-site land survey soil thickness is about 11-13 meters, is below lithosphere, and the spheroidal graphite cast-iron screw pile needs to squeeze into ground
9-10 meters under face.
In work progress, using similar to the same engineering equipment of excavator, this equipment can allow the spheroidal graphite cast-iron
Screw pile rotation can apply pressure to the spheroidal graphite cast-iron screw pile again, while computer screen can also be shown in work progress at any time
Rotary torsion value.
First construct the straight type guide pipe 1, it is remaining 1 meter on ground when it is threaded into 5 meters of underground, will the straight type company
The socket 1.2 of the bellmouth of female connector 3.2 and the straight type guide pipe 1 connects together, and is formed a whole with 4 bolt connections,
Construction is then proceeded to, until computer shows that moment of torsion becomes sufficiently large, bearing capacity has met requirement.At this moment 2 be there remains on ground
The straight type extension tube 3 of rice is cut behind levelling welding chassis, and factory building column is installed on the spheroidal graphite cast-iron screw pile.
Embodiment 3
Infrastructure line holder is made using the tapered screw pile of spheroidal graphite cast-iron.
As viewed in figures 5-8, the ball that prepared by a kind of a kind of preparation technology of spheroidal graphite cast-iron screw pile described in use embodiment 1
Black cast iron screw pile, the spheroidal graphite cast-iron screw pile includes guide pipe, and the guide pipe is inverted cone-shaped guide pipe 4, the back taper
The lower end of type guide pipe 4 has ramp type pinnacle 4.1, and the place plane on the ramp type pinnacle 4.1 and the angle of horizontal plane are
45 °, two rotors 5 for helically rising shape, the number of turns of the rotor 5 are sequentially provided with along the axis of the inverted cone-shaped guide pipe 4
Equal to 1, the terminal 5.1 of the top 5.2 of the rotor 5 and the rotor 5 is at a distance of 150mm.
The inverted cone-shaped guide pipe 4 is connected by welding with the rotor 5.
The upper end of the inverted cone-shaped guide pipe 4, which has, is provided with 4 at bellmouth 4.2, the bellmouth 4.2 of the inverted cone-shaped guide pipe 4
Individual bolt hole, the spheroidal graphite cast-iron screw pile also includes the first inverted cone-shaped extension tube 6 and the second inverted cone-shaped extension tube 7, described the
The lower end of one inverted cone-shaped extension tube 6 has at socket 6.2, the socket 6.2 of the first inverted cone-shaped extension tube 6 provided with 4 bolts
Hole, the upper end of the first inverted cone-shaped extension tube 6 has to be set at bellmouth 6.1, the bellmouth 6.1 of the first inverted cone-shaped extension tube 6
There are 4 bolts hole, the grafting of bellmouth 4.2 of the socket 6.2 of the first inverted cone-shaped extension tube 6 and the tapered guide pipe 4, and lead to
With bolt conjunction；
The lower end of the second inverted cone-shaped extension tube 7 has socket 7.2, the socket 7.2 of the second inverted cone-shaped extension tube 7
Place is provided with 4 bolts hole, and the upper end of the second inverted cone-shaped extension tube 7 has bellmouth 7.1, the second inverted cone-shaped extension tube 7
Bellmouth 7.1 at provided with 4 bolts hole, pass through between the first inverted cone-shaped extension tube 6 and the second inverted cone-shaped extension tube 7
Socket connection, i.e., the socket 7.2 of described second inverted cone-shaped extension tube 7 is inserted into the bellmouth 6.1 of the first inverted cone-shaped extension tube 6
In, and by bolt conjunction.
The lower end diameter of the inverted cone-shaped guide pipe 4 is 150mm, and length is 6230mm, and wall thickness is 6.5mm；
The lower end diameter of the first inverted cone-shaped extension tube 6 is 230mm, and length is 6230mm, and wall thickness is 7.5mm；
The lower end diameter of the second inverted cone-shaped extension tube 7 is 306mm, and length is 6230mm, and wall thickness is 8mm；
The taper of the inverted cone-shaped guide pipe 4, the first inverted cone-shaped extension tube 6 and the second inverted cone-shaped extension tube 7
It is 16：1000.
The socket 6.2 of the first inverted cone-shaped extension tube 6 is inserted into the depth of the bellmouth 4.2 of the inverted cone-shaped guide pipe 4
More than or equal to the internal diameter of the bellmouth 4.2 of the inverted cone-shaped guide pipe 4；
The socket 7.2 of the second inverted cone-shaped extension tube 7 is inserted into the bellmouth 6.1 of the first inverted cone-shaped extension tube 6
Depth is more than or equal to the internal diameter of the bellmouth 6.1 of the first inverted cone-shaped extension tube 6 positioned at bottom；
The excircle configuration face of the rotor 5 is than the high 300mm of outer wall of the inverted cone-shaped guide pipe 4, the thickness of the rotor 5
For 20mm.
Rotor piling machine is first constructed the inverted cone-shaped guide pipe 4, when its be driven underground 5.2 meters when, residue 1 on ground
Rice, the socket 6.2 of the first inverted cone-shaped extension tube 6 is inserted in the bellmouth 4.2 of the inverted cone-shaped guide pipe 4, spiral shell is then used
Tether and connect；Continue to construct, when with it is remaining 1 meter on the ground of the first inverted cone-shaped extension tube 6 when, will second inverted cone-shaped extension
The socket 7.2 of pipe 7 is inserted in the bellmouth 6.1 of the first inverted cone-shaped extension tube 6, is then connected with；Continuation is beaten with rotor
Ram machine construction, until computer shows that moment of torsion becomes sufficiently large, illustrates that bearing capacity has reached design requirement.At this moment it there remains on ground
1-2 meters of the second inverted cone-shaped extension tubes 7.
According to the design requirement of pipeline bearing capacity, a saddle lower margin is accepted above every spheroidal graphite cast-iron screw pile,
After first the unnecessary tapered extension tube 7 in ground is cut off, the basic chassis of welding, then the lower margin of pipe support is connected to basic chassis
Above, pipe support lower margin basis is completed.
Embodiment 4
Infrastructure factory building column is made using the special-shaped screw pile of spheroidal graphite cast-iron
As shown in figs. 9-11, prepared by a kind of a kind of preparation technology of spheroidal graphite cast-iron screw pile described in use embodiment 1
Spheroidal graphite cast-iron screw pile, the spheroidal graphite cast-iron screw pile includes guide pipe, and the guide pipe is special-shaped guide pipe 8, the abnormal shape
The lower end of guide pipe 8 has ramp type pinnacle 8.1, and the place plane on the ramp type pinnacle 8.1 and the angle of horizontal plane are
45 °, the top of the special-shaped guide pipe 8, which has at tapered socket 8.2, the tapered socket 8.2 of the special-shaped guide pipe 8,4
Bolt hole, the middle part 8.3 of the special-shaped guide pipe 8 is straight type body, and the bottom 8.4 of the special-shaped guide pipe 8 is straight type body,
Two rotors 9 for helically rising shape are sequentially provided with along the axis of the special-shaped guide pipe 8, the number of turns of the rotor 9 is equal to 1,
The top 9.2 of the rotor 9 and terminal 9.1 are apart from for 150mm.
The special-shaped guide pipe 8 is connected by welding with the rotor 9.
The spheroidal graphite cast-iron screw pile also includes a special-shaped extension tube 10, and the bottom of the special-shaped extension tube 10 has cone
There is straight type body, top to have tapered socket 10.1 for type bellmouth 10.3, middle part 10.2.
Provided with 4 bolts hole at the tapered bellmouth 10.3 of the special-shaped extension tube 10, the special-shaped extension tube 10 it is tapered
Provided with 4 bolts hole at socket 10.1.The tapered socket 8.2 of the special-shaped guide pipe 8 is tapered with the special-shaped extension tube 10
Bellmouth 10.3 is connected, and by bolt conjunction.
The length of the special-shaped guide pipe 8 and special-shaped extension tube 10 is 6m, and wall thickness is 9mm, the special-shaped guide pipe 8
Tapered socket 8.2 and the tapered bellmouth 10.3 of the special-shaped extension tube 10, the taper of tapered socket 10.1 are all identical, and taper is
20：1000, taper length is 350mm, and wall thickness is 15mm；
The excircle configuration face of the rotor 9 is higher than the outer wall of the straight type body positioned at the bottom 8.4 of the special-shaped guide pipe 8
350mm, the thickness of the rotor 9 is 10mm.
On-site land survey soil thickness is about 11-12 meters, is below lithosphere, and the spheroidal graphite cast-iron screw pile needs to squeeze into ground
9-10 meters under face, screw pile is most deep to touch rock.
In work progress, using similar to the same engineering equipment of excavator, this equipment can allow the spheroidal graphite cast-iron
Screw pile rotation can apply pressure to the spheroidal graphite cast-iron screw pile again, while computer screen can also be shown in work progress at any time
Rotary torsion value.
First construct the special-shaped guide pipe 8, it is remaining 1 meter on ground when it is threaded into 5 meters of underground, the abnormal shape is prolonged
The tapered socket 8.2 of the tapered bellmouth 10.3 of long tube 10 and the special-shaped guide pipe 8 connects together, with 4 bolt connection groups
Into an entirety, construction is then proceeded to, until computer shows that moment of torsion becomes sufficiently large, bearing capacity has met requirement, or this
The lower end of Shi Suoshu abnormal shape guide pipes 8 has been planted on lithosphere.At this moment 2 meters of the special-shaped extension tube 8 is there remains on ground
Cut behind levelling welding chassis, factory building column is installed on the spheroidal graphite cast-iron screw pile.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (10)
1. a kind of preparation technology of spheroidal graphite cast-iron screw pile, it is characterised in that with following steps：
Prepare before S1, casting stake：Dispensing, fusing, modulation treatment, the spheroidising of dispensing：
S11, the dispensing include following mass parts material for the raw material used：
Foundry iron is blast-melted：90-95 parts；
Steel scrap：5-10 parts；
S12, being molten into for the dispensing weigh raw material by the mass parts of each raw material in step S11, and melted；
S13, the modulation treatment are the alloying element of addition adjustment hot metal composition in the molten iron obtained into step S12；
S14, the spheroidising are addition nodularization element in the molten iron obtained into step S13；
S2, casting stake process：
The molten iron obtained in step S14 is poured into a mould by water-cooled metal mould centrifugal casting technique, it is white to obtain matrix
The cast blank pipe of mouth, adds inovulant into molten iron while cast；
S3, heat treatment, finishing processing：
Cast blank pipe is handled by high-temperature carbonization annealing, obtains the high intensity ball using matrix as ferrite and pearlite
Graphite cast iron pipe；Pipe after annealing obtains spheroidal graphite cast-iron screw pile product after finishing is handled.
2. spheroidal graphite cast-iron spiral prepared by a kind of a kind of preparation technology of spheroidal graphite cast-iron screw pile described in use claim 1
Stake, it is characterised in that：The spheroidal graphite cast-iron screw pile includes guide pipe, and the lower end of the guide pipe has ramp type pinnacle, edge
The axis of the guide pipe is sequentially provided with least two rotors for helically rising shape.
3. spheroidal graphite cast-iron screw pile according to claim 2, it is characterised in that the guide pipe is straight type guide pipe or fallen
Tapered guide pipe or special-shaped guide pipe, the special-shaped guide pipe are included positioned at its underpart, the straight type body at middle part and disposed thereon
The tapered socket in portion.
4. spheroidal graphite cast-iron screw pile according to claim 3, it is characterised in that when the guide pipe is straight type guide pipe,
The spheroidal graphite cast-iron screw pile also includes at least one straight type extension tube, and the straight type extension tube includes straight type pipe and is welded on institute
The straight type adapter sleeve of straight type pipe lower end is stated, the lower end of the straight type adapter sleeve has bellmouth, and the upper end of the straight type pipe, which has, inserts
Mouthful.
When the number of the straight type extension tube is equal to 1, the straight type guide pipe upper end is connected with the bellmouth of straight type extension tube, and
By bolt conjunction；
When the number of the straight type extension tube is more than 1, the straight type guide pipe upper end is connected with the straight type extension tube faucet of head sections,
And by bolt closing, by the socket and superposed straight type of the straight type extension tube positioned at bottom between adjacent straight type extension tube
The bellmouth connection of extension tube, and by bolt conjunction.
5. spheroidal graphite cast-iron screw pile according to claim 4, it is characterised in that the total length of the spheroidal graphite cast-iron screw pile
For 1.5-30m, the length of the straight type guide pipe and the straight type extension tube is 4-9m, and wall thickness is respectively 6-30mm；It is described straight
The external diameter of type guide pipe and the straight type pipe is equal, and the external diameter is 150-700mm；
The length of the straight type adapter sleeve is 400-1000mm, and wall thickness is 8-30mm；
The excircle configuration face of the rotor is than the high 100-800mm of outer wall of the straight type guide pipe, and the thickness of the rotor is 8-
60mm。
6. spheroidal graphite cast-iron screw pile according to claim 3, it is characterised in that when the guide pipe is oriented to for inverted cone-shaped
Pipe, the upper end of the inverted cone-shaped guide pipe has bellmouth, and the spheroidal graphite cast-iron screw pile also includes at least one inverted cone-shaped and extended
Pipe, the upper end of the inverted cone-shaped extension tube has bellmouth, and lower end has socket；
When the number of the inverted cone-shaped extension tube is equal to 1, the bellmouth of the inverted cone-shaped guide pipe and the inverted cone-shaped extension tube
Socket connection, and pass through bolt close；
When the number of the inverted cone-shaped extension tube is more than 1, the bellmouth of the inverted cone-shaped guide pipe and first section inverted cone-shaped extension tube
Socket connection, and by bolt closing, between adjacent inverted cone-shaped extension tube by the bellmouth positioned at bottom inverted cone-shaped extension tube with
Socket positioned at top inverted cone-shaped extension tube is connected, and by bolt conjunction.
7. spheroidal graphite cast-iron screw pile according to claim 6, it is characterised in that the total length of the spheroidal graphite cast-iron screw pile
For 1.5-30m, the inverted cone-shaped guide pipe is identical with the taper of the inverted cone-shaped extension tube, and taper is 14-20：1000, it is long
Degree is 4-9m, and wall thickness is 6-30mm；
The depth for the bellmouth that the socket of the first section inverted cone-shaped extension tube is inserted into the inverted cone-shaped guide pipe is more than or equal to described
The internal diameter of the bellmouth of inverted cone-shaped guide pipe；
In adjacent inverted cone-shaped extension tube, the socket of superposed inverted cone-shaped extension tube is inserted into the inverted cone-shaped extension positioned at bottom
The depth of the bellmouth of pipe is more than or equal to the internal diameter of the bellmouth of the inverted cone-shaped extension tube positioned at bottom；
The excircle configuration face of the rotor is than the high 100-800mm of outer wall of the inverted cone-shaped guide pipe, and the thickness of the rotor is
8-60mm；
The lower end diameter of the inverted cone-shaped guide pipe is 150-300mm；The lower end diameter of the inverted cone-shaped extension tube is 230-
600mm。
8. spheroidal graphite cast-iron screw pile according to claim 3, it is characterised in that when the guide pipe is special-shaped guide pipe；
The spheroidal graphite cast-iron screw pile also includes at least one special-shaped extension tube, the bottom of the special-shaped extension tube have tapered bellmouth,
There is straight type body, top to have tapered socket at middle part；
When the number of the special-shaped extension tube is equal to 1, the tapered socket of the special-shaped guide pipe and the special-shaped extension tube
Tapered bellmouth connection, and by bolt conjunction；
When the number of the special-shaped extension tube is more than 1, the tapered socket of the special-shaped guide pipe and the special-shaped extension tube of first section
Tapered bellmouth connection, and by bolt closing, by positioned at the tapered of the special-shaped extension tube in bottom between the adjacent special-shaped extension tube
Socket is connected with positioned at the tapered bellmouth of the special-shaped extension tube in top, and by bolt conjunction.
9. spheroidal graphite cast-iron screw pile according to claim 8, it is characterised in that the total length of the spheroidal graphite cast-iron screw pile
For 1.5-30m, the length of the special-shaped guide pipe and the special-shaped extension tube is 4-9m, and the tapered of the special-shaped guide pipe inserts
The taper all same of mouth, the tapered bellmouth of the special-shaped extension tube and tapered socket, taper is 15-30：1000, taper length is equal
For 200-800mm, wall thickness is 6-30mm；Outer wall high 100- of the excircle configuration face of the rotor than the special-shaped guide pipe
800mm, the thickness of the rotor is 8-60mm.
10. spheroidal graphite cast-iron screw pile according to claim 8, it is characterised in that the special-shaped guide pipe and special-shaped extension
The diameter of the straight type body of pipe is identical, diameter range 150-800mm.
Priority Applications (2)
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|---|---|---|---|
| CN201710373838.9A CN106987761A (en) | 2017-05-24 | 2017-05-24 | A kind of preparation technology of spheroidal graphite cast-iron screw pile and the spheroidal graphite cast-iron screw pile prepared using the technique |
| PCT/CN2018/086827 WO2018214782A1 (en) | 2017-05-24 | 2018-05-15 | Process for preparing spheroidal graphite cast iron screw pile and spheroidal graphite cast iron screw pile prepared using said process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710373838.9A CN106987761A (en) | 2017-05-24 | 2017-05-24 | A kind of preparation technology of spheroidal graphite cast-iron screw pile and the spheroidal graphite cast-iron screw pile prepared using the technique |
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|---|---|
| CN106987761A true CN106987761A (en) | 2017-07-28 |
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| CN201710373838.9A Pending CN106987761A (en) | 2017-05-24 | 2017-05-24 | A kind of preparation technology of spheroidal graphite cast-iron screw pile and the spheroidal graphite cast-iron screw pile prepared using the technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018214782A1 (en) * | 2017-05-24 | 2018-11-29 | 希姆莱斯（大连）科技有限公司 | Process for preparing spheroidal graphite cast iron screw pile and spheroidal graphite cast iron screw pile prepared using said process |
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| CN205242427U (en) * | 2015-10-30 | 2016-05-18 | 瀚川基业（北京）科技有限公司 | Novel iron tower basis |
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| JP2006022623A (en) * | 2004-07-09 | 2006-01-26 | Kubota Corp | Soil cement composite pile and its construction method |
| CN102011395A (en) * | 2010-11-12 | 2011-04-13 | 新兴河北工程技术有限公司 | Piling tube |
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| WO2018214782A1 (en) * | 2017-05-24 | 2018-11-29 | 希姆莱斯（大连）科技有限公司 | Process for preparing spheroidal graphite cast iron screw pile and spheroidal graphite cast iron screw pile prepared using said process |
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Effective date of registration: 20180522 Address after: 116000 4-1-901, B3, Xinghai Plaza, Shahekou District, Dalian, Liaoning. Applicant after: Yu Yifei Address before: 116000 room 506, three three building, 929 south-west mouth, Shahekou District, Liaoning, China Applicant before: SEAMLESS (DALIAN) TECHNOLOGY Co.,Ltd. |
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