CN105568982A - Arc inserting and buckling device for L-shaped piles and rectangular piles - Google Patents
Arc inserting and buckling device for L-shaped piles and rectangular piles Download PDFInfo
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- CN105568982A CN105568982A CN201511012368.0A CN201511012368A CN105568982A CN 105568982 A CN105568982 A CN 105568982A CN 201511012368 A CN201511012368 A CN 201511012368A CN 105568982 A CN105568982 A CN 105568982A
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- concrete
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- 239000002689 soil Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 73
- 238000003756 stirring Methods 0.000 claims description 27
- 238000005553 drilling Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 3
- 238000005516 engineering process 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an arc inserting and buckling device for L-shaped piles and rectangular piles. The multiple L-shaped concrete inserting and buckling piles arranged at one rectangular inserting and buckling pile distance interval are manufactured. When the concrete of the L-shaped inserting and buckling piles on the two sides reaches certain strength, a rectangular hole is manufactured between every two adjacent L-shaped concrete inserting and buckling piles through a rectangular pile forming machine according to the work mode of the above rectangular pile forming machine. Concrete is poured in the rectangular holes to form the rectangular concrete inserting and buckling piles. A concave arc end at the left end of the rectangular concrete inserting and buckling pile between every two adjacent L-shaped concrete inserting and buckling piles is matched with a convex arc end at the right end of the corresponding L-shaped concrete inserting and buckling pile on the left side, and a convex arc end at the right end of the rectangular concrete inserting and buckling pile between every two adjacent L-shaped concrete inserting and buckling piles is matched with a concave arc end at the left end of the corresponding L-shaped concrete inserting and buckling pile on the right side, and accordingly, a pile wall with arc inserting and buckling between the multiple L-shaped concrete inserting and buckling piles and the rectangular concrete inserting and buckling pile between every two adjacent L-shaped concrete inserting and buckling piles is formed and used for soil blocking and seepage preventing of a building foundation.
Description
Technical field
The present invention relates to the L stake and rectangular pile circular arc eye-splice equipment that use in a kind of circular arc eye-splice equipment, particularly a kind of building foundation engineering.
Background technology
Cement-soil pile forming machine is by the multiple drill bit rotational of power drive, the earth of drill bit bottom cuts and stirs into cement earth pile with cement paste by multiple drill bit in rotation process, at present, formed by the Soil-cement rig of other pattern, pile body is all the assembly of multiple cement-soil cylinder, is not the mutual eye-splice piling wall of L shape concrete pile and rectangular concrete pile.
Summary of the invention
The present invention compensate for above shortcoming, provides a kind of L stake and the rectangular pile circular arc eye-splice equipment that can manufacture L shape concrete pile body and the mutual circular arc eye-splice of Rectangular Concrete pile body.
The present invention is achieved through the following technical solutions:
A kind of L stake and rectangular pile circular arc eye-splice equipment, comprise L stake pile forming machine and rectangular pile pile forming machine.
L stake pile forming machine comprises following structure: the left end rear portion of crossbeam one is fixed in the front end of crossbeam two, form a L-type component thus, the center of gravity position of L-type component is fixed in the lower end of support bar one, the left end bottom of crossbeam one is fixed with vertical rod one, the lower end of vertical rod one is fixed with motor one, the lower end of motor one is fixed with transmission case one, the middle lower portion of crossbeam one is fixed with vertical rod two, the lower end of vertical rod two is fixed with transmission case two, the right-hand member bottom of crossbeam one is fixed with vertical rod three, the lower end of vertical rod three is fixed with transmission case three, the rear end lower of crossbeam two is fixed with vertical rod four, the lower end of vertical rod four is fixed with transmission case four, transmission case one, transmission case two, transmission case three, the lower end of transmission case four is respectively equipped with a drilling rod, the lower end of each drilling rod fixes a drill bit respectively, a torsion shaft one is provided with between transmission case one and transmission case two, a torsion shaft one is provided with between transmission case two and transmission case three, a torsion shaft two is provided with between transmission case one and transmission case four, a link arm is fixed on the middle both sides of each torsion shaft one respectively, and the outer end of each link arm is fixed one respectively and stirred arm one, a link arm is fixed on the middle both sides of torsion shaft two respectively, and the outer end of each link arm is fixed one respectively and stirred arm two, the left front of transmission case one and left back export a torsion shaft three respectively, and the left end of each torsion shaft three fixes a recessed dise knife respectively.
Rectangular pile pile forming machine comprises following structure: motor two upper end is fixed in support bar two lower end, and driver three upper end is fixed in motor two lower end; Support bar two bottom left end is fixed with transverse arm one, the left end bottom of transverse arm one is fixed with column one, and the lower end of column one is fixed with driver one, and support bar two bottom right-hand member is fixed with transverse arm two, the right-hand member bottom of transverse arm two is fixed with column two, and the lower end of column two is fixed with driver two; The lower end of driver one, driver two, driver three is respectively equipped with a drilling rod, and the lower end of each drilling rod is respectively equipped with a drill bit; Be respectively equipped with a driving shaft one between driver three and driver one, between driver three and driver two, a linking arm is fixed on the middle both sides of every driving shaft one respectively, and the outer end of each linking arm fixes a stirring cutter respectively; The left back of driver one and left front export a driving shaft two respectively, and the left end of each driving shaft two fixes a recessed dise knife respectively.
The present invention has following feature:
The present invention can manufacture the piling wall of L shape concrete pile body and the mutual circular arc eye-splice of Rectangular Concrete pile body, for gear soil, the antiseepage of building foundation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the structural representation of L stake pile forming machine;
Fig. 2 is A-A direction view of Fig. 1;
Fig. 3 is B-B view of Fig. 1;
Fig. 4 is C-C direction view of Fig. 1;
Fig. 5 is the structural representation of rectangular pile pile forming machine;
Fig. 6 is D-D view of Fig. 5;
Fig. 7 is the cross-sectional view of L stake and the eye-splice of rectangular pile circular arc.
In figure: 1, support bar one, 2, crossbeam one, 3, vertical rod one, 4, vertical rod two, 5, vertical rod three, 6, motor one, 7, transmission case one, 8, transmission case two, 9, transmission case three, 10, torsion shaft one, 11, stir arm one, 12, drilling rod, 13, drill bit, 14, vertical rod four, 15, crossbeam two, 16, transmission case four, 17, link arm, 18, torsion shaft three, 19, recessed dise knife, 20, stir arm two, 21, torsion shaft two; 31, support bar two, 32, motor two, 33, driver three, 34, driver one, 35, driver two, 36, transverse arm one, 37, transverse arm two, 38, driving shaft one, 39, stir cutter, 40, column one, 41, column two, 44, driving shaft two, 46, linking arm.
Detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention, and this embodiment comprises L stake pile forming machine and rectangular pile pile forming machine.
L stake pile forming machine comprises the structure in Fig. 1, Fig. 2, Fig. 3, Fig. 4, concrete structure is as follows: the left end rear portion of crossbeam 1 is fixed in the front end of crossbeam 2 15, form a L-type component thus, the center of gravity position of L-type component is fixed in the lower end of support bar 1, the left end bottom of crossbeam one is fixed with vertical rod 1, the lower end of vertical rod one is fixed with motor 1, the lower end of motor one is fixed with transmission case 1, the middle lower portion of crossbeam one is fixed with vertical rod 24, the lower end of vertical rod two is fixed with transmission case 28, the right-hand member bottom of crossbeam one is fixed with vertical rod 35, the lower end of vertical rod three is fixed with transmission case 39, the rear end lower of crossbeam two is fixed with vertical rod 4 14, the lower end of vertical rod four is fixed with transmission case 4 16, transmission case one, transmission case two, transmission case three, the lower end of transmission case four is respectively equipped with a drilling rod 12, the lower end of each drilling rod fixes a drill bit 13 respectively, a torsion shaft 1 is provided with between transmission case one and transmission case two, a torsion shaft one is provided with between transmission case two and transmission case three, a torsion shaft two is provided with between transmission case one and transmission case four, a link arm 17 is fixed on the middle both sides of each torsion shaft one respectively, and the outer end of this each link arm is fixed one respectively and stirred arm 1, a link arm 17 is fixed on the middle both sides of torsion shaft two respectively, and the outer end of this each link arm is fixed one respectively and stirred arm two, the left front of transmission case one and left back export a torsion shaft three respectively, and the left end of each torsion shaft three fixes a recessed dise knife respectively, and the dome arc termination that the concave arc termination formed during these two recessed dise knife work and the drill bit of transmission case three lower end are formed coincide.
Two in each torsion shaft one torsion shafts one of stirring arm one and being parallel to its place respectively.
Two in torsion shaft two torsion shafts two of stirring arm two and being parallel to its place respectively.
Two in each torsion shaft one equal diameters of stirring distance between arm one and drill bit.
Two in torsion shaft two equal diameters of stirring distance between arm two and drill bit.
The specific works mode of L stake pile forming machine is as follows: pile frame is also provided with and send sizing device, sizing device is sent to pour into water under high pressure respectively to each drill bit during work, motor one drives transmission case one running, the on-stream rotary actuation transmission case two by the torsion shaft one in the right of transmission case one operates, the on-stream rotary actuation transmission case four by the torsion shaft two in back of transmission case one operates, transmission case two is on-stream to be operated by the rotary actuation transmission case three of a torsion shaft one on the right of it, transmission case one, transmission case two, transmission case three, the on-stream bit driven respectively by the drilling rod of under it under it of transmission case four, each torsion shaft one drives respectively by the link arm on it and stirs arm one rotation in rotation, and torsion shaft two is driven by the link arm on it and stirs arm two rotation in rotation, and each torsion shaft three drives the recessed dise knife of torsion shaft three left end to rotate respectively in rotation, the soil cutting of its underpart stirs by each drill bit in rotation, the region being less than bit diameter between two drill bits on torsion shaft one both sides is cut by the arm one that stirs in each torsion shaft one in rotation, the region being less than bit diameter between two drill bits on torsion shaft two both sides is cut by the arm two that stirs in torsion shaft two in rotation, and the soil cutting of left end is become concave arc termination by the recessed dise knife in two torsion shafts three in rotation, the soil body cut is mixed in mud, mud flows out from hole, and support bar one is compressed into process and formed a left end with concave arc termination, right-hand member with the L shape hole of dome arc termination downwards.
Rectangular pile pile forming machine comprises the structure in Fig. 5, Fig. 6; Concrete structure is as follows: motor 2 32 upper end is fixed in support bar 2 31 lower end, and driver 3 33 upper end is fixed in motor two lower end; Support bar two bottom left end is fixed with transverse arm 1, the left end bottom of transverse arm one is fixed with column 1, the lower end of column one is fixed with driver 1, support bar two bottom right-hand member is fixed with transverse arm 2 37, the right-hand member bottom of transverse arm two is fixed with column 2 41, and the lower end of column two is fixed with driver 2 35; The lower end of driver one, driver two, driver three is respectively equipped with a drilling rod 12, and the lower end of each drilling rod is respectively equipped with a drill bit 13; Be respectively equipped with a driving shaft 1 between driver three and driver one, between driver three and driver two, a linking arm 46 is fixed on the middle both sides of every driving shaft one respectively, and the outer end of each linking arm fixes a stirring cutter 39 respectively; The left back of driver one and left front export a driving shaft 2 44 respectively, and the left end of each driving shaft two fixes a recessed dise knife 19 respectively.
The specific works mode of rectangular pile pile forming machine is as follows: rectangular pile pile forming machine is also provided with high-pressure pump, during work, high-pressure pump injects water under high pressure respectively to each drill bit, motor two drives driver three running, driver three is operated by the rotating drive driver one of driving shaft one, driver two in operation process, and driver one drives the relative synchronous axial system of driving shaft two of the driving shaft two of left back and left front respectively in operation process; Driver one, driver two, driver three drive drill bit rotational respectively by the drilling rod of its lower end, and the soil cutting of its lower end stirs by three drill bits in rotation; Two driving shafts one drive two linking arms on each driving shaft one to drive respectively and stir cutter around driving shaft one rotation in rotation, stir cutter in rotation process, the part soil cutting being less than bit diameter between every two drill bits to be stirred, two driving shafts two drive the recessed dise knife on driving shaft two to rotate respectively in rotation, and the soil cutting of the termination of left part is become concave arc termination by recessed dise knife in rotation; The dome arc termination that the concave arc termination of left part and the drill bit of right part driver two lower end are formed matches; The soil body cut is mixed in mud, mud flows out from hole, and support bar two is compressed into process and formed a right-hand member with dome arc termination, left end with the rectangular opening of concave arc termination downwards.
L stake pile forming machine and rectangular pile pile forming machine associated working process as follows: first in the original position needing pile axis, a L shape hole is manufactured according to the working method of above-mentioned L stake pile forming machine with L stake pile forming machine, concreting, the stake of formation concrete L shape socket in this L shape hole, on the right side of this concrete L shape eye-splice stake, the distance of the rectangle eye-splice stake in interval manufactures second concrete L shape eye-splice stake again, so manufacture one, multiple interval rectangle eye-splice pilespacing from multiple concrete L shape eye-splice stakes, when the concrete of the L shape eye-splice stake on both sides reaches some strength, in spacing again between every two concrete L shape eye-splice stakes, a rectangular opening is manufactured according to the working method of above-mentioned rectangular pile pile forming machine with rectangular pile pile forming machine, concreting in this rectangular opening, form concrete rectangular eye-splice stake, the concave arc termination of the concrete rectangular eye-splice stake left end between every two concrete L shape eye-splice stakes is made to be fit to the dome arc termination of left side concrete L shape eye-splice stake right-hand member, the dome arc termination of concrete rectangular eye-splice stake right-hand member is fit to the concave arc termination of the right concrete L shape eye-splice stake left end, the piling wall of the mutual circular arc eye-splice of concrete rectangular eye-splice stake between formation like this multiple concrete L shape eye-splice stake and every two concrete L shape eye-splice stakes, for the gear soil of building foundation, antiseep.
Claims (1)
1. L stake and a rectangular pile circular arc eye-splice equipment, comprise L stake pile forming machine and rectangular pile pile forming machine;
It is characterized in that: the concrete structure of L stake pile forming machine comprises: the left end rear portion of crossbeam 1 is fixed in the front end of crossbeam 2 15, form a L-type component thus, the center of gravity position of L-type component is fixed in the lower end of support bar 1, the left end bottom of crossbeam one is fixed with vertical rod 1, the lower end of vertical rod one is fixed with motor 1, the lower end of motor one is fixed with transmission case 1, the middle lower portion of crossbeam one is fixed with vertical rod 24, the lower end of vertical rod two is fixed with transmission case 28, the right-hand member bottom of crossbeam one is fixed with vertical rod 35, the lower end of vertical rod three is fixed with transmission case 39, the rear end lower of crossbeam two is fixed with vertical rod 4 14, the lower end of vertical rod four is fixed with transmission case 4 16, transmission case one, transmission case two, transmission case three, the lower end of transmission case four is respectively equipped with a drilling rod 12, the lower end of each drilling rod fixes a drill bit 13 respectively, a torsion shaft 1 is provided with between transmission case one and transmission case two, a torsion shaft one is provided with between transmission case two and transmission case three, a torsion shaft two is provided with between transmission case one and transmission case four, a link arm 17 is fixed on the middle both sides of each torsion shaft one respectively, and the outer end of this each link arm is fixed one respectively and stirred arm 1, a link arm 17 is fixed on the middle both sides of torsion shaft two respectively, and the outer end of this each link arm is fixed one respectively and stirred arm two, the left front of transmission case one and left back export a torsion shaft three respectively, and the left end of each torsion shaft three fixes a recessed dise knife respectively, and the dome arc termination that the concave arc termination formed during these two recessed dise knife work and the drill bit of transmission case three lower end are formed coincide,
Sizing device is sent to pour into water under high pressure respectively to each drill bit during the work of L stake pile forming machine, motor one drives transmission case one running, the on-stream rotary actuation transmission case two by the torsion shaft one in the right of transmission case one operates, the on-stream rotary actuation transmission case four by the torsion shaft two in back of transmission case one operates, transmission case two is on-stream to be operated by the rotary actuation transmission case three of a torsion shaft one on the right of it, the on-stream bit driven respectively by the drilling rod of under it under it of transmission case one, transmission case two, transmission case three, transmission case four; Each torsion shaft one drives respectively by the link arm on it and stirs arm one rotation in rotation, and torsion shaft two is driven by the link arm on it and stirs arm two rotation in rotation, and each torsion shaft three drives the recessed dise knife of torsion shaft three left end to rotate respectively in rotation; The soil cutting of its underpart stirs by each drill bit in rotation, the region being less than bit diameter between two drill bits on torsion shaft one both sides is cut by the arm one that stirs in each torsion shaft one in rotation, the region being less than bit diameter between two drill bits on torsion shaft two both sides is cut by the arm two that stirs in torsion shaft two in rotation, and the soil cutting of left end is become concave arc termination by the recessed dise knife in two torsion shafts three in rotation; The soil body cut is mixed in mud, mud flows out from hole, and support bar one is compressed into process and formed a left end with concave arc termination, right-hand member with the L shape hole of dome arc termination downwards;
The concrete structure of rectangular pile pile forming machine comprises: motor 2 32 upper end is fixed in support bar 2 31 lower end, and driver 3 33 upper end is fixed in motor two lower end; Support bar two bottom left end is fixed with transverse arm 1, the left end bottom of transverse arm one is fixed with column 1, the lower end of column one is fixed with driver 1, support bar two bottom right-hand member is fixed with transverse arm 2 37, the right-hand member bottom of transverse arm two is fixed with column 2 41, and the lower end of column two is fixed with driver 2 35; The lower end of driver one, driver two, driver three is respectively equipped with a drilling rod 12, and the lower end of each drilling rod is respectively equipped with a drill bit 13; Be respectively equipped with a driving shaft 1 between driver three and driver one, between driver three and driver two, a linking arm 46 is fixed on the middle both sides of every driving shaft one respectively, and the outer end of each linking arm fixes a stirring cutter 39 respectively; The left back of driver one and left front export a driving shaft 2 44 respectively, and the left end of each driving shaft two fixes a recessed dise knife 19 respectively;
During the work of rectangular pile pile forming machine, high-pressure pump injects water under high pressure respectively to each drill bit, motor two drives driver three running, driver three is operated by the rotating drive driver one of driving shaft one, driver two in operation process, and driver one drives the relative synchronous axial system of driving shaft two of the driving shaft two of left back and left front respectively in operation process; Driver one, driver two, driver three drive drill bit rotational respectively by the drilling rod of its lower end, and the soil cutting of its lower end stirs by three drill bits in rotation; Two driving shafts one drive two linking arms on each driving shaft one to drive respectively and stir cutter around driving shaft one rotation in rotation, stir cutter in rotation process, the part soil cutting being less than bit diameter between every two drill bits to be stirred, two driving shafts two drive the recessed dise knife on driving shaft two to rotate respectively in rotation, and the soil cutting of the termination of left part is become concave arc termination by recessed dise knife in rotation; The dome arc termination that the concave arc termination of left part and the drill bit of right part driver two lower end are formed matches; The soil body cut is mixed in mud, mud flows out from hole, and support bar two is compressed into process and formed a right-hand member with dome arc termination, left end with the rectangular opening of concave arc termination downwards;
L stake pile forming machine and rectangular pile pile forming machine associated working process: first in the original position needing pile axis, a L shape hole is manufactured according to the working method of above-mentioned L stake pile forming machine with L stake pile forming machine, concreting, the stake of formation concrete L shape socket in this L shape hole, on the right side of this concrete L shape eye-splice stake, the distance of the rectangle eye-splice stake in interval manufactures second concrete L shape eye-splice stake again, so manufacture one, multiple interval rectangle eye-splice pilespacing from multiple concrete L shape eye-splice stakes, when the concrete of the L shape eye-splice stake on both sides reaches some strength, in spacing again between every two concrete L shape eye-splice stakes, a rectangular opening is manufactured according to the working method of above-mentioned rectangular pile pile forming machine with rectangular pile pile forming machine, concreting in this rectangular opening, form concrete rectangular eye-splice stake, the concave arc termination of the concrete rectangular eye-splice stake left end between every two concrete L shape eye-splice stakes is made to be fit to the dome arc termination of left side concrete L shape eye-splice stake right-hand member, the dome arc termination of concrete rectangular eye-splice stake right-hand member is fit to the concave arc termination of the right concrete L shape eye-splice stake left end, the piling wall of the mutual circular arc eye-splice of concrete rectangular eye-splice stake between formation like this multiple concrete L shape eye-splice stake and every two concrete L shape eye-splice stakes, for the gear soil of building foundation, antiseep.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511012368.0A CN105568982A (en) | 2015-12-31 | 2015-12-31 | Arc inserting and buckling device for L-shaped piles and rectangular piles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511012368.0A CN105568982A (en) | 2015-12-31 | 2015-12-31 | Arc inserting and buckling device for L-shaped piles and rectangular piles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105568982A true CN105568982A (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511012368.0A Withdrawn CN105568982A (en) | 2015-12-31 | 2015-12-31 | Arc inserting and buckling device for L-shaped piles and rectangular piles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105568982A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105442554A (en) * | 2015-12-31 | 2016-03-30 | 宋姝娴 | Circular-arc eye-splice equipment for L-shaped piles and rectangular piles |
-
2015
- 2015-12-31 CN CN201511012368.0A patent/CN105568982A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105442554A (en) * | 2015-12-31 | 2016-03-30 | 宋姝娴 | Circular-arc eye-splice equipment for L-shaped piles and rectangular piles |
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Application publication date: 20160511 |
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| WW01 | Invention patent application withdrawn after publication |