CN106284306A - Piling bar is strengthened in a kind of spliced spin without spoir - Google Patents
Piling bar is strengthened in a kind of spliced spin without spoir Download PDFInfo
- Publication number
- CN106284306A CN106284306A CN201610861425.0A CN201610861425A CN106284306A CN 106284306 A CN106284306 A CN 106284306A CN 201610861425 A CN201610861425 A CN 201610861425A CN 106284306 A CN106284306 A CN 106284306A
- Authority
- CN
- China
- Prior art keywords
- piling bar
- spliced
- spoir
- steel disk
- spin
- 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
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
-
- 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
Abstract
The invention discloses a kind of spliced spin without spoir and strengthen piling bar, described piling bar includes the steel axle that at least two is mutually spliced, described piling bar is provided with at least two reinforcement structure, described reinforcement structure is spiral steel disk, distance between adjoining spiral steel disk is 25 times of spiral steel disk diameter, and the height of described spiral steel disk is a pitch length.Piling bar is spliced by multiple steel axles, easy accessibility and being readily transported；Piling bar is provided with spiral steel disk, applies a small amount of external force and piling bar can quickly screw in ground, it is not necessary to large-scale pile driving equipment, without excavation, it is not necessary to precipitation, construction noise are little；The height of spiral steel disk is that the spacing between a pitch length and adjoining spiral steel disk is when being above-mentioned recommended range numerical value, spoir is not produced during screwing in, simultaneously, spiral steel disk can be directly as the bearing assembly of pile body the direct load-bearing of Developed fiber strength at once after screwing in, without placing concrete, therefore N-free diet method concrete curing setting time.
Description
Technical field
The present invention relates to the pile body of stiffening basic ground, be specifically related to a kind of spliced spin without spoir and strengthen steel
Stake.
Background technology
Although based on cement cementitious material be main coagulation great soil group stake China middle-size and small-size all kinds of stiffening basic ground with
Pile foundation engineering is widely applied, but due to the characteristic of concrete material itself, cast-in-place concrete class stake is easily subject to
The impact of pile body construction weather, the intensity of coagulation great soil group stake plays needs certain wait curing time.Prefabricated pile avoids
The problem stating cast-in-place construction, China's existing construction of prefabricated piles method mainly has hammering method, vibratory drilling method and plunging.Hammering method is i.e.
Use the pile monkey such as steam hammer, diesel hammer that prefabricated pile is driven into ground, but the biggest vibration and noise can be produced, to ring around during construction
The impact of border and neighboring buildings works is bigger；The vibrator that vibratory drilling method is i.e. pushed up by stake makes prefabricated pile squeeze into along with vibration-sunk
Ground, but vibratory drilling method is not suitable for general clay foundation；Plunging i.e. uses static pile press to be pressed in ground by prefabricated pile,
And static press piling should not be used in thickness and is more than the situation of close above skerry in 2m.Additionally, prefabricated pile is from great, need to join
Overlap large-scale piling machine, hang a crane and correlative transporting equipment, be only applicable to the situation having broad Active workings；Prefabricated pile without
Opinion takes opening or solid section form, can produce soil compaction effect the most largely, thus cause at extra spoir
Science and engineering is made；The bearing capacity of existing prefabricated pile is poor, is mainly used in the geological environments such as weak soil, and being difficult in the geological environments such as decomposed rock should
With.
Summary of the invention
The technical problem to be solved is to provide that a kind of construction is convenient, bearing capacity strong, do not produce spoir when installing,
The geological environment pile body the most applicatory such as from weak soil to weathered rocks.
The present invention solves the technical scheme that above-mentioned technical problem used, and steel is strengthened in a kind of spliced spin without spoir
Stake, described piling bar includes the steel axle that at least two is mutually spliced, is provided with at least two reinforcement structure on described piling bar, described in add
Strong structure is spiral steel disk, and the distance between adjoining spiral steel disk is 2-5 times of spiral steel disk diameter, the height of described spiral steel disk
Degree is a pitch length.
First, pile body uses Steel material to make, and Steel material not only processing effect is good, and bearing capacity is strong, is adaptable to from weak soil
To the various geological environments of weathered rocks, and the ductility of Steel material is better than coagulation great soil group stake, has higher opposing earthquake
The ability of ripple deformation；Secondly, piling bar is spliced by multiple steel axles, not only easy accessibility and being readily transported, it is to avoid uses and hangs stake
The transporting equipment that crane etc. are large-scale；Furthermore, reinforcement structure is spiral steel disk, and applying a small amount of moment of torsion quickly can screw in piling bar
Weathered rocks, not only without large-scale pile driving equipment, without excavation, and also little without precipitation, construction noise；The height of spiral steel disk
It is the spacing between a pitch length and adjoining spiral steel disk when being above-mentioned recommended range numerical value, during screwing in almost
Not producing spoir and screw-in resistance is little, meanwhile, spiral steel disk adds the contact area of piling bar and ground, thus adds piling bar
Bearing capacity, can be directly as pile body after screw-in, it is not necessary to placing concrete again, therefore N-free diet method concrete curing setting time,
Simple in construction and economic and practical.When the distance of adjoining spiral steel disk is less than above-mentioned numerical range, although the bearing capacity of piling bar increases
By force, but the moment of torsion when spoir produced when screwing in increases and screws in increases, when the distance of adjoining spiral steel disk is higher than above-mentioned numerical value
During scope, then steel disk bearing capacity stiffening effect reduction.Further, a diameter of 150-600mm of described spiral steel disk, thickness
For 6-12mm, pitch is 50-100mm.When screwing in ground beyond the spiral steel disk of above-mentioned parameter scope, required moment of torsion is big, to executing
Work plant equipment requires higher；Limited to the lifting effect of piling bar bearing capacity less than the spiral steel disk of above-mentioned parameter scope.For
Different geological environments and load case, select the steel axle of various sizes of spiral steel disk and correspondence.
Further, described spiral steel disk is at least three and is equally distributed.Spiral steel disk is simultaneously as bearing load
Primary clustering and driving parts, the quantity of spiral steel disk is distributed with it to be needed to consider bearing capacity and economy, if spiral shell
The quantity of rotation steel disk is too much, although bearing capacity is higher, but the spoir produced when screwing in is the most, if the quantity mistake of spiral steel disk
Few, although to screw in the spoir produced few, but corresponding bearing capacity will reduce.
Further, at the outer ledge of described spiral steel disk, be provided with cutting edge, this cutting edge can reduce steel axle screw in ground time
Resistance.
Further, described steel axle is solid construction, and its external diameter is 40-65mm；Or described steel axle is tubular structure, its external diameter
For 65-300mm, wall thickness 5-15mm.When steel axle is thinner, the bearing capacity using solid steel axle is higher, the horizontal stroke of thinner steel axle
Cross section is little, and the spoir of generation is few；When using thicker steel axle, the spoir using the steel axle of hollow-core construction to produce is few.In employing
State the steel axle of parameter area, convenient transport can be had concurrently, the advantage that strong without spoir and bearing capacity and cost is low.Certainly, except often
Outside the circular steel axle seen, can select cross section is square steel axle, and now, above-mentioned external diameter is the described square length of side.For
Be easy to screw in, can make piling bar lower end steel axle to pierce end face at a certain angle with steel axle axis.
Further, the yield strength >=345MPa of described spiral steel disk；Yield strength >=the 235MPa of described steel axle.Steel axle
On the one hand as the major structural member of bearing load, the carrier on the other hand lengthened as piling bar splicing, and spiral steel disk was both
As the core texture assembly of carrying load, again as the digging tool of the screw-in soil body, therefore use the spiral shell of above-mentioned yield strength
Rotation steel disk and steel axle, its bearing capacity is strong, and service life is long.
Further, described piling bar also includes the pipe box connecting adjacent steel axle, and described steel axle connects outer wall and the pipe box of end
Inwall matches, and is bolted connection between steel axle and pipe box.Above-mentioned attachment structure is simple, and steadiness is good and dismounting side
Just.
Further, described in be fastenedly connected employing bolt, the outer screw diameter of described bolt is 18-28mm.Further, described pipe
The wall thickness of set is 5-15mm, a length of 10-16cm.
Further, the outer surface of described piling bar is provided with anticorrosive coat, to avoid piling bar to be embedded in the rust corruption that underground causes for a long time
Erosion problem.Further, described anticorrosive coat is made up of zinc, and calorizing or galvanoplastic can be used to set up zinc anticorrosion at piling bar outer surface
Layer.
Compared with prior art, a kind of spliced spin reinforcement piling bar without spoir of the present invention has the advantage that (1)
The suitability is wide: be applicable to the various geology from weak soil to weathered rocks；(2) quick construction is efficient: without large-scale pile driving equipment, nothing
Excavation is without spoir, it is not necessary to wait that concrete curing condenses；(3) environmental effect is little: without precipitation, and construction noise is little, and can be anti-
Screw out ground to be reused in other temporary buildings；(4) shock resistance is good: steel ductility is better than coagulation great soil group stake, opposing ground
The ability of seismic wave deformation is better than coagulation great soil group stake；(5) overall economics is good: without processing the spoir that the construction of other pile bodies produces,
The pile body direct load-bearing N-free diet method time, quick construction and to lift the expense of removing low；(6) bearing capacity is quickly estimated: by installing torque value
Directly quickly estimate pile body bearing capacity, thus cheaply select the piling bar of suitable bearing capacity, it is to avoid the peace of bearing capacity initiation the most up to standard
Full accident.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of spliced spin reinforcement piling bar without spoir of embodiment 1.
Fig. 2 is the structural representation of spiral steel disk.
Fig. 3 is the structural representation of a kind of spliced spin reinforcement piling bar without spoir of embodiment 2.
Fig. 4 is the structural representation of a kind of spliced spin reinforcement piling bar without spoir of embodiment 3.
Fig. 5 is the structural representation of a kind of spliced spin reinforcement piling bar without spoir of embodiment 4.
Fig. 6 is the structural representation of a kind of spliced spin reinforcement piling bar without spoir of embodiment 5.
Detailed description of the invention
Embodiment 1
Piling bar is strengthened in a kind of spliced spin without spoir as shown in Figure 1, including 1, pipe box 3 of two steel axles, and two
The opposite side of individual steel axle 1 is inserted pipe box 3 and is fastenedly connected by two bolts 4.Two spiral shells up it are provided with from the lower end of piling bar
Rotation steel disk 2.Described steel axle 1 is the hollow pipe of a length of 2m, uses Q235 steel (its yield strength is more than 235MPa) to make, outside it
Footpath is 100mm, wall thickness 8mm.The structure of described spiral steel disk 2 is as in figure 2 it is shown, its orthographic projection is circular, and diameter d1 is 300mm,
Thickness be 8mm, highly d2 be a pitch length, pitch is 80mm, uses Q345 steel (its yield strength be more than 345MPa) system
Becoming, the outer ledge of spiral steel disk 2 is provided with cutting edge 21, and spacing d3 of adjoining spiral steel disk 2 is three times of spiral steel disk 2 diameter.
Described spiral steel disk 2 is welded as a whole with steel axle 1 according to " GB50661-2011 welding for steel structure specification ".The spiral shell of described bolt 4
Bar external diameter is 24mm.The internal diameter of described pipe box 3 mates with the external diameter of steel axle 1, and the wall thickness of pipe box 3 is 10mm, a length of 16cm.?
The outer surface of piling bar is provided with zinc anticorrosive coat.
Embodiment 2
A kind of spliced spin without spoir as shown in Figure 3 strengthens piling bar, including 1, two pipe boxes 3 of three steel axles, phase
The opposite side of adjacent steel axle 1 is inserted corresponding pipe box 3 and is fastenedly connected by two bolts 4.From the lower end of piling bar toward first-class
Away from being provided with four spiral steel disks 2.Described steel axle 1 is the solid tubes of a length of 1m, and (its yield strength is more than to use Q235 steel
235MPa) making, its external diameter is 40mm.The structure of described spiral steel disk 2 is as in figure 2 it is shown, its orthographic projection is circular, and diameter d1 is
200mm, thickness be 15mm, highly d2 be a pitch length, pitch is 100mm, use Q345 steel (yield strength is more than
345MPa) making, the outer ledge of spiral steel disk 2 is provided with cutting edge 21, and spacing d3 of adjoining spiral steel disk 2 is that spiral steel disk 2 is straight
The twice in footpath.Described spiral steel disk 2 is welded as a whole with steel axle 1 according to " GB50661-2011 welding for steel structure specification ".Described
The outer screw diameter of bolt 4 is 18mm.The internal diameter of described pipe box 3 mates with the external diameter of steel axle 1, and the wall thickness of pipe box 3 is 8mm, length
For 10cm.Outer surface at piling bar is provided with zinc anticorrosive coat.
Embodiment 3
Piling bar is strengthened in a kind of spliced spin without spoir as shown in Figure 4, including 1, pipe box 3 of two steel axles, and two
The opposite side of individual steel axle 1 is inserted pipe box 3 and is fastenedly connected by two bolts 4.The most equidistantly it is provided with from the lower end of piling bar
Three spiral steel disks 2.Described steel axle 1 is the solid tubes of a length of 3m, uses Q235 steel (its yield strength is more than 235MPa) system
Becoming, its external diameter is 50mm.The structure of described spiral steel disk 2 is as in figure 2 it is shown, its orthographic projection is circular, and diameter d1 is 150mm, thick
Degree is a pitch length for 12mm, highly d2, and pitch is 100mm, uses Q345 steel (yield strength is more than 345MPa) to make,
The outer ledge of spiral steel disk 2 is provided with cutting edge 21, and spacing d3 of adjoining spiral steel disk 2 is four times of spiral steel disk 2 diameter.Described
Spiral steel disk 2 is welded as a whole with steel axle 1 according to " GB50661-2011 welding for steel structure specification ".Outside the screw rod of described bolt 4
Footpath is 20mm.The internal diameter of described pipe box 3 mates with the external diameter of steel axle 1, and the wall thickness of pipe box 3 is 8mm, a length of 16cm.At piling bar
Outer surface be provided with zinc anticorrosive coat.
Embodiment 4
A kind of spliced spin without spoir as shown in Figure 5 strengthens piling bar, including 1, two pipe boxes 3 of three steel axles, phase
The opposite side of adjacent steel axle 1 is inserted corresponding pipe box 3 and is fastenedly connected by two bolts 4.From the lower end of piling bar toward first-class
Away from being provided with five spiral steel disks 2.Described steel axle 1 is the hollow pipe of a length of 1m, and (its yield strength is more than to use Q235 steel
235MPa) making, its external diameter is 50mm, and wall thickness is 5mm.The structure of described spiral steel disk 2 is as in figure 2 it is shown, its orthographic projection is circle
Shape, diameter d1 is 250mm, thickness be 10mm, highly d2 be a pitch length, pitch is 100mm, use Q345 steel (surrender
Intensity is more than 345MPa) to make, the outer ledge of spiral steel disk 2 is provided with cutting edge 21, and spacing d3 of adjoining spiral steel disk 2 is spiral
The twice of steel disk 2 diameter.Described spiral steel disk 2 is welded as one according to " GB50661-2011 welding for steel structure specification " and steel axle 1
Body.The outer screw diameter of described bolt 4 is 20mm.The internal diameter of described pipe box 3 mates with the external diameter of steel axle 1, and the wall thickness of pipe box 3 is
8mm, a length of 12cm.Outer surface at piling bar is provided with zinc anticorrosive coat.
Embodiment 5
Piling bar is strengthened in a kind of spliced spin without spoir as shown in Figure 6, including 1, two pipe boxes 3 of two steel axles, and two
The opposite side of individual steel axle 1 is inserted pipe box 3 and is fastenedly connected by two bolts 4.Two spiral shells up it are provided with from the lower end of piling bar
Rotation steel disk 2.Described steel axle 1 is the hollow pipe of a length of 2m, uses Q235 steel (its yield strength is more than 235MPa) to make, outside it
Footpath is 300mm, and wall thickness is 15mm.The structure of described spiral steel disk 2 is as in figure 2 it is shown, its orthographic projection is circular, and diameter d1 is
600mm, thickness be 5mm, highly d2 be a pitch length, pitch is 50mm, use Q345 steel (yield strength is more than
345MPa) making, the outer ledge of spiral steel disk 2 is provided with cutting edge 21, and spacing d3 of adjoining spiral steel disk 2 is that spiral steel disk 2 is straight
Five times of footpath.Described spiral steel disk 2 is welded as a whole with steel axle 1 according to " GB50661-2011 welding for steel structure specification ".Described
The outer screw diameter of bolt 4 is 28mm.The internal diameter of described pipe box 3 mates with the external diameter of steel axle 1, and the wall thickness of pipe box 3 is 8mm, length
For 16cm.Outer surface at piling bar is provided with zinc anticorrosive coat.
Empirical tests, a kind of spliced spin without spoir described in above-described embodiment 1-5 is strengthened piling bar and is applicable to from weak soil
To the Standard penetration test blow count various geology of weathered rocks less than 100, and not producing spoir when using, bearing capacity is strong and installation side
Just.The definition of described Standard penetration test blow count is: freely fallen from the height of 76cm by the hammer of 63.5kg, by a length of 51cm, outward
The penetrator that footpath is 5.1cm, internal diameter is 3.49cm is driven into the blow counts in ground needed for 30cm.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
In the case of General Principle can be in without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, this
The bright the embodiments shown herein that will not be limited to, and be intended to accord with principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (10)
1. piling bar is strengthened in a spliced spin without spoir, it is characterised in that: described piling bar includes that at least two is mutually spliced
Steel axle (1)；Being provided with at least two reinforcement structure on described piling bar, described reinforcement structure is spiral steel disk (2), adjoining spiral
Distance between steel disk (2) is 2-5 times of spiral steel disk (2) diameter, and the height of described spiral steel disk is a pitch length.
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 1, it is characterised in that: described spiral steel disk
(2) a diameter of 150-600mm, thickness is 6-12mm, and pitch is 50-100mm.
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 1, it is characterised in that: described spiral steel disk
(2) it is at least three and is equally distributed.
4. piling bar is strengthened in a kind of spliced spin without spoir as described in one of claim 1-3, it is characterised in that: described spiral shell
It is provided with cutting edge (21) at the outer ledge of rotation steel disk (2)；Yield strength >=the 345MPa of described spiral steel disk (2).
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 1, it is characterised in that: described steel axle (1)
For solid construction, its external diameter is 40-65mm.
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 1, it is characterised in that: described steel axle (1)
For tubular structure, its external diameter is 65-300mm, wall thickness 5-15mm.
7. piling bar is strengthened in a kind of spliced spin without spoir as described in claim 5 or 6, it is characterised in that: described steel axle
(1) yield strength >=235MPa.
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 1, it is characterised in that: described piling bar also wraps
Including the pipe box (3) connecting adjacent steel axle (1), the inwall of outer wall and pipe box (3) that described steel axle (1) connects end matches, steel axle
(1) and it is fastenedly connected between pipe box (3).
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 8, it is characterised in that be fastenedly connected described in:
Using bolt (4), the outer screw diameter of described bolt (4) is 18-28mm；The wall thickness of described pipe box is 5-15mm, a length of 10-
16cm。
Piling bar is strengthened in a kind of spliced spin without spoir the most as claimed in claim 1, it is characterised in that: described piling bar
Outer surface is provided with anticorrosive coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861425.0A CN106284306A (en) | 2016-09-29 | 2016-09-29 | Piling bar is strengthened in a kind of spliced spin without spoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861425.0A CN106284306A (en) | 2016-09-29 | 2016-09-29 | Piling bar is strengthened in a kind of spliced spin without spoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106284306A true CN106284306A (en) | 2017-01-04 |
Family
ID=57715390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610861425.0A Pending CN106284306A (en) | 2016-09-29 | 2016-09-29 | Piling bar is strengthened in a kind of spliced spin without spoir |
Country Status (1)
| Country | Link |
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| CN (1) | CN106284306A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012859A (en) * | 2017-06-09 | 2017-08-04 | 希姆莱斯（大连）科技有限公司 | Carbon steel coil stake |
| CN109518682A (en) * | 2018-12-21 | 2019-03-26 | 西南交通大学 | Spiral steel pile with logatithmic spiral blade construction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904447A (en) * | 1997-07-02 | 1999-05-18 | Integrated Stabilization Technologies Inc. | Drive device used for soil stabilization |
| JP2006009446A (en) * | 2004-06-28 | 2006-01-12 | Chiyoda Koei Kk | Winged steel pipe pile |
| CN203977414U (en) * | 2014-08-15 | 2014-12-03 | 沈夏明 | Novel spiral stake |
| CN204608757U (en) * | 2014-11-13 | 2015-09-02 | 昆明理工大学 | A kind of steel pipe pile pile splicing structure |
| CN205134308U (en) * | 2015-07-31 | 2016-04-06 | 瀚川基业（北京）科技有限公司 | Revolve and twist piling bar that creeps into |
| CN206173949U (en) * | 2016-09-29 | 2017-05-17 | 固远晨通科技发展有限公司 | Concatenation formula does not have spin of spoir and strengthens piling bar |
-
2016
- 2016-09-29 CN CN201610861425.0A patent/CN106284306A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904447A (en) * | 1997-07-02 | 1999-05-18 | Integrated Stabilization Technologies Inc. | Drive device used for soil stabilization |
| JP2006009446A (en) * | 2004-06-28 | 2006-01-12 | Chiyoda Koei Kk | Winged steel pipe pile |
| CN203977414U (en) * | 2014-08-15 | 2014-12-03 | 沈夏明 | Novel spiral stake |
| CN204608757U (en) * | 2014-11-13 | 2015-09-02 | 昆明理工大学 | A kind of steel pipe pile pile splicing structure |
| CN205134308U (en) * | 2015-07-31 | 2016-04-06 | 瀚川基业（北京）科技有限公司 | Revolve and twist piling bar that creeps into |
| CN206173949U (en) * | 2016-09-29 | 2017-05-17 | 固远晨通科技发展有限公司 | Concatenation formula does not have spin of spoir and strengthens piling bar |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012859A (en) * | 2017-06-09 | 2017-08-04 | 希姆莱斯（大连）科技有限公司 | Carbon steel coil stake |
| CN109518682A (en) * | 2018-12-21 | 2019-03-26 | 西南交通大学 | Spiral steel pile with logatithmic spiral blade construction |
| CN109518682B (en) * | 2018-12-21 | 2023-09-22 | 西南交通大学 | Spiral steel pile with logarithmic spiral vane structure |
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Application publication date: 20170104 |