CN105604049A - Equipment for cross-shaped insertion connection of regular octagonal piles and rectangular piles - Google Patents
Equipment for cross-shaped insertion connection of regular octagonal piles and rectangular piles Download PDFInfo
- Publication number
- CN105604049A CN105604049A CN201610123508.XA CN201610123508A CN105604049A CN 105604049 A CN105604049 A CN 105604049A CN 201610123508 A CN201610123508 A CN 201610123508A CN 105604049 A CN105604049 A CN 105604049A
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- China
- Prior art keywords
- pile
- rectangular
- stake
- driving
- driving box
- 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
- E02D5/34—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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/001—Drilling a non circular hole
-
- 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
- E02D2200/1628—Shapes rectangular
-
- 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
- E02D2200/165—Shapes polygonal
Abstract
The invention discloses equipment for cross-shaped insertion connection of regular octagonal piles and rectangular piles. The equipment comprises a rectangular pile forming machine and a regular octagonal pile forming machine. A plurality of rectangular concrete piles are made at intervals of a regular octagonal pile; when the concrete strength of the rectangular piles on two sides reaches a certain degree, a regular octagonal concrete pile is made within a distance between every two rectangular piles by the regular octagonal pile forming machine according to a working mode of the regular octagonal pile forming machine, then two rectangular concrete piles are made at front and rear ends of each regular octagonal pile respectively, and thus a pile wall formed by cross-shaped insertion connection of the regular octagonal concrete piles with the rectangular concrete pile between every two regular octagonal concrete piles and the rectangular concrete piles in front and rear of the regular octagonal concrete piles is obtained and used for soil retaining and seepage prevention of building foundations.
Description
Technical field
The present invention relates to the octagon stake and the rectangular pile cross docking device that in a kind of pile body manufacturing installation, particularly a kind of foundation engineering, use.
Background technology
Soil cement pile-formation machine is to rotate by the multiple drill bits of power drive, multiple drill bits stir into cement earth pile by the earth cutting of drill bit bottom with cement mortar in rotation process, at present, in building foundation engineering, be all to form by multiple soil cement cylinder overlap joints for keeping off the cement-soil pile of soil, antiseepage.
Summary of the invention
The present invention has made up above shortcoming, provides a kind of and can manufacture octagon stake and the rectangular pile cross docking device that rectangular pile and octagon stake are pegged graft mutually.
The present invention is achieved through the following technical solutions:
A kind of octagon stake and rectangular pile cross docking device, comprise rectangular pile pile-formation machine and octagon stake pile-formation machine.
Rectangular pile pile-formation machine comprises following structure: creep into bar lower end and be fixed on motor one upper end, driving box three upper ends are fixed in motor one lower end; Creep into bar bottom left end and be fixed with transverse arm one, the left end bottom of transverse arm one is fixed with armstand one, and the lower end of armstand one is fixed with driving box one, creeps into bar bottom right-hand member and is fixed with transverse arm two, the right-hand member bottom of transverse arm two is fixed with armstand two, and the lower end of armstand two is fixed with driving box two; The lower end of driving box one, driving box two, driving box three is respectively equipped with a drilling rod one, and the lower end of each drilling rod one is respectively equipped with a drill bit one; Between driving box three and driving box one, be respectively equipped with a driving shaft one between driving box three and driving box two, a linking arm is fixed respectively on the middle both sides of every driving shaft one, and the outer end of each linking arm is fixed respectively one and stirred cutter one; A driving shaft two is exported respectively in the right back of driving box two and right front, and the right-hand member of this each driving shaft two is fixed respectively a triangular knife; A driving shaft two is exported respectively in the left back of driving box one and left front, the left end of this each driving shaft two is fixed respectively a triangular knife, a driving shaft three of right-hand member output of driving box two, the right-hand member of this driving shaft three is fixed one and is stirred cutter two, a driving shaft three of left end output of driving box one, the left end of this driving shaft three is fixed one and is stirred cutter two.
Octagon stake pile-formation machine comprises following structure: the upper end of the lower end fixed motor two of drilling rod two, and motor two lower ends are provided with gearbox, and the output shaft of gearbox lower end is fixed with drill bit two; The left end of gearbox, right-hand member, rear end, front end are exported respectively a power transmission shaft, and a tulwar is fixed respectively in the outer end of each power transmission shaft.
The present invention has following feature:
The present invention can manufacture concrete rectangular stake and the anterior piling wall of mutually pegging graft with the rectangular pile at rear portion of octagon stake between the stake of multiple soil cement octagon and every two octagon stakes, for gear soil, the antiseep of building foundation.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is the structural representation of rectangular pile pile-formation machine;
Fig. 2 is A-A view of Fig. 1;
Fig. 3 is the structural representation of octagon stake pile-formation machine;
Fig. 4 is B-B view of Fig. 3;
Fig. 5 is the cross-sectional view of rectangular pile and the octagon stake piling wall of mutually pegging graft.
In figure: 1, creep into bar, 2, motor one, 3, driving box three, 4, driving box one, 5, driving box two, 6, transverse arm one, 7, transverse arm two, 8, driving shaft one, 9, stir cutter one, 10, armstand one, 11, armstand two, 12, drilling rod one, 13, drill bit one, 14, driving shaft two, 15, triangular knife, 16, linking arm, 17, driving shaft three, 18, stir cutter two, 21, drilling rod two, 22, motor two, 23, gearbox, 24, drill bit two, 25, power transmission shaft, 26, tulwar.
Detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention, and this embodiment comprises rectangular pile pile-formation machine and octagon stake pile-formation machine.
Rectangular pile pile-formation machine comprises the structure in Fig. 1, Fig. 2; Concrete structure is as follows: creep into bar 1 lower end and be fixed on motor one 2 upper ends, driving box 33 upper ends are fixed in motor one lower end; Creep into bar bottom left end and be fixed with transverse arm 1, the left end bottom of transverse arm one is fixed with armstand 1, and the lower end of armstand one is fixed with driving box 1, creeps into bar bottom right-hand member and is fixed with transverse arm 27, the right-hand member bottom of transverse arm two is fixed with armstand 2 11, and the lower end of armstand two is fixed with driving box 25; The lower end of driving box one, driving box two, driving box three is respectively equipped with a drilling rod 1, and the lower end of each drilling rod one is respectively equipped with a drill bit 1; Between driving box three and driving box one, be respectively equipped with a driving shaft 1 between driving box three and driving box two, a linking arm 16 is fixed respectively on the middle both sides of every driving shaft one, and the outer end of each linking arm is fixed respectively one and stirred cutter 1; A driving shaft 2 14 is exported respectively in the right back of driving box two and right front, and the right-hand member of this each driving shaft two is fixed respectively a triangular knife 15; A driving shaft 2 14 is exported respectively in the left back of driving box one and left front, and the left end of this each driving shaft two is fixed respectively a triangular knife 15; A driving shaft 3 17 of right-hand member output of driving box two, the right-hand member of this driving shaft three is fixed one and is stirred cutter 2 18, a driving shaft 3 17 of left end output of driving box one, the left end of this driving shaft three is fixed one and is stirred cutter 2 18.
The specific works mode of rectangular pile pile-formation machine is as follows: rectangular pile pile-formation machine is provided with grouting pump, when work, grouting pump injects respectively water under high pressure to each drill bit one, motor one drives driving box three runnings, driving box three rotating drive driving box one, driving box two by driving shaft one in operation process turns round, driving box two drives respectively the driving shaft two of right back and the driving shaft two of right front relative to synchronously rotating in operation process, and driving box two drives driving shaft three rotations of right-hand member simultaneously, the on-stream driving shaft two of left back and the driving shaft two of left front of driving respectively of driving box one is relative to synchronously rotating, and driving box one drives driving shaft three rotations of left end simultaneously, driving box one, driving box two, driving box three drive drill bit one rotation by the drilling rod one of its lower end respectively, three drill bits one in rotation by the soil cutting of its lower end, two driving shafts one drive respectively two linking arms drives on each driving shaft one to stir cutter one around driving shaft one rotation in rotation, stir cutter one in rotation process by between every two drill bits one, between two common tangents of two drill bit one cylindricals, the unhewn soil cutting of drill bit one, two driving shafts two of right-hand member drive respectively the triangular knife on two driving shafts two of right-hand member to rotate in rotation, what the driving shaft three of right-hand member drove right-hand member in rotation stirs cutter two rotations, two triangular knifes of right-hand member and stir cutter two, in rotation, the soil cutting of the termination of right part is become to recessed trapezoidal, two driving shafts two of left end drive respectively the triangular knife on two driving shafts two of left end to rotate in rotation, what the driving shaft three of left end drove left end in rotation stirs cutter two rotations, two triangular knifes of left end and stir cutter two, in rotation, the soil cutting of the termination of left part is become to recessed trapezoidal, the soil body machining away is mixed in mud, water under high pressure constantly injects, mud constantly flows out from hole, creep into bar and compress into process downwards and form two ends, a left and right respectively with recessed trapezoidal rectangular opening, in this rectangular opening casting concrete, form concrete rectangular stake.
Octagon stake pile-formation machine comprises the structure in Fig. 3, Fig. 4; Concrete structure is as follows: the upper end of the lower end fixed motor 2 22 of drilling rod 2 21, and motor two lower ends are provided with gearbox 23, and the output shaft of gearbox lower end is fixed with drill bit 2 24; A power transmission shaft 25 is exported respectively in the left end of gearbox, right-hand member, front end, rear end, and a tulwar 26 is fixed respectively in the outer end of each power transmission shaft.
The specific works mode of octagon stake pile-formation machine is as follows: when work, grouting pump is to drill bit two grout injections, motor two drives gearbox running, gearbox drives drill bit two rotations in operation process, and drill bit two stirs the soil cutting of drill bit two lower ends and cement mortar in rotary course; Gearbox drives respectively the power transmission shaft of left end, right-hand member, front end, rear end to drive respectively the rotation of tulwar in operation process, and the circle cutting that four tulwars form drill bit two in rotary course stirs into octagon with cement mortar; Drilling rod two forms the stake of soil cement octagon in the process of compressing into.
The protruding trapezoidal of the recessed trapezoidal and place, every limit of octagon at two ends, two rectangular pile left and right coincide.
Rectangular pile pile-formation machine and octagon stake pile-formation machine associated working process are as follows: in the original position that needs pile axis, manufacture a concrete rectangular stake according to the working method of above-mentioned rectangular pile pile-formation machine with rectangular pile pile-formation machine, manufacture second concrete rectangular stake in the distance of the octagon stake in the interval, right side of this rectangular pile, so manufacture one, multiple intervals octagon pilespacing from concrete rectangular stake; When the concrete strength of the rectangular pile on both sides reaches a timing, again in the distance between every two rectangular piles, manufacture the stake of a soil cement octagon with octagon stake pile-formation machine according to the working method of above-mentioned octagon stake pile-formation machine, protruding trapezoidal recessed trapezoidal, the soil cement octagon stake right-hand member that is fit to left side rectangular pile right-hand member that makes soil cement octagon stake left end between every two concrete rectangular stakes protruding trapezoidal is fit to the recessed trapezoidal of the right concrete rectangular stake left end; When the soil cement intensity of octagon stake reaches a timing, manufacture respectively a concrete rectangular stake in the rear and front end of each octagon stake again, protruding trapezoidal recessed trapezoidal, the octagon stake rear end that is fit to the stake of front end concrete rectangular that makes octagon stake front end protruding trapezoidal is fit to the recessed trapezoidal of rear end concrete rectangular stake; So form concrete rectangular stake and the anterior piling wall of mutually pegging graft with the rectangular pile at rear portion of octagon stake between the stake of multiple soil cement octagon and every two octagon stakes, for gear soil, the antiseep of building foundation.
Claims (2)
1. octagon stake and a rectangular pile cross docking device, comprises rectangular pile pile-formation machine and octagon stake pile-formation machine, it is characterized in that:
The concrete structure of rectangular pile pile-formation machine comprises: creep into bar (1) lower end and be fixed on motor one (2) upper end, driving box three (3) upper ends are fixed in motor one lower end; Creep into bar bottom left end and be fixed with transverse arm one (6), the left end bottom of transverse arm one is fixed with armstand one (10), the lower end of armstand one is fixed with driving box one (4), creep into bar bottom right-hand member and be fixed with transverse arm two (7), the right-hand member bottom of transverse arm two is fixed with armstand two (11), and the lower end of armstand two is fixed with driving box two (5); The lower end of driving box one, driving box two, driving box three is respectively equipped with a drilling rod one (12), and the lower end of each drilling rod one is respectively equipped with a drill bit one (13); Between driving box three and driving box one, be respectively equipped with a driving shaft one (8) between driving box three and driving box two, a linking arm (16) is fixed respectively on the middle both sides of every driving shaft one, and the outer end of each linking arm is fixed respectively one and stirred cutter one (9); A driving shaft two (14) is exported respectively in the right back of driving box two and right front, and the right-hand member of this each driving shaft two is fixed respectively a triangular knife (15); A driving shaft two (14) is exported respectively in the left back of driving box one and left front, and the left end of this each driving shaft two is fixed respectively a triangular knife (15); A driving shaft three (17) of right-hand member output of driving box two, the right-hand member of this driving shaft three is fixed one and is stirred cutter two (18), a driving shaft three (17) of left end output of driving box one, the left end of this driving shaft three is fixed one and is stirred cutter two (18);
The specific works mode of rectangular pile pile-formation machine: when the work of rectangular pile pile-formation machine, grouting pump injects respectively water under high pressure to each drill bit one, motor one drives driving box three runnings, driving box three rotating drive driving box one, driving box two by driving shaft one in operation process turns round, driving box two drives respectively the driving shaft two of right back and the driving shaft two of right front relative to synchronously rotating in operation process, and driving box two drives driving shaft three rotations of right-hand member simultaneously, the on-stream driving shaft two of left back and the driving shaft two of left front of driving respectively of driving box one is relative to synchronously rotating, and driving box one drives driving shaft three rotations of left end simultaneously, driving box one, driving box two, driving box three drive drill bit one rotation by the drilling rod one of its lower end respectively, three drill bits one in rotation by the soil cutting of its lower end, two driving shafts one drive respectively two linking arms drives on each driving shaft one to stir cutter one around driving shaft one rotation in rotation, stir cutter one in rotation process by between every two drill bits one, between two common tangents of two drill bit one cylindricals, the unhewn soil cutting of drill bit one, two driving shafts two of right-hand member drive respectively the triangular knife on two driving shafts two of right-hand member to rotate in rotation, what the driving shaft three of right-hand member drove right-hand member in rotation stirs cutter two rotations, two triangular knifes of right-hand member and stir cutter two, in rotation, the soil cutting of the termination of right part is become to recessed trapezoidal, two driving shafts two of left end drive respectively the triangular knife on two driving shafts two of left end to rotate in rotation, what the driving shaft three of left end drove left end in rotation stirs cutter two rotations, two triangular knifes of left end and stir cutter two, in rotation, the soil cutting of the termination of left part is become to recessed trapezoidal, the soil body machining away is mixed in mud, water under high pressure constantly injects, mud constantly flows out from hole, creep into bar and compress into process downwards and form two ends, a left and right respectively with recessed trapezoidal rectangular opening, in this rectangular opening casting concrete, form concrete rectangular stake,
The concrete structure of octagon stake pile-formation machine comprises: the upper end of the lower end fixed motor 2 22 of drilling rod 2 21, and motor two lower ends are provided with gearbox 23, and the output shaft of gearbox lower end is fixed with drill bit 2 24; A power transmission shaft 25 is exported respectively in the left end of gearbox, right-hand member, front end, rear end, and a tulwar 26 is fixed respectively in the outer end of each power transmission shaft;
The specific works mode of octagon stake pile-formation machine is: when work, grouting pump is to drill bit two grout injections, motor two drives gearbox running, gearbox drives drill bit two rotations in operation process, and drill bit two stirs the soil cutting of drill bit two lower ends and cement mortar in rotary course; Gearbox drives respectively the power transmission shaft of left end, right-hand member, front end, rear end to drive respectively the rotation of tulwar in operation process, and the circle cutting that four tulwars form drill bit two in rotary course stirs into octagon with cement mortar; Drilling rod two forms the stake of soil cement octagon in the process of compressing into;
Rectangular pile pile-formation machine and octagon stake pile-formation machine associated working mode: in the original position that needs pile axis, manufacture a concrete rectangular stake according to the working method of above-mentioned rectangular pile pile-formation machine with rectangular pile pile-formation machine, manufacture second concrete rectangular stake in the distance of the octagon stake in the interval, right side of this rectangular pile, so manufacture one, multiple intervals octagon pilespacing from concrete rectangular stake; When the concrete strength of the rectangular pile on both sides reaches a timing, again in the distance between every two rectangular piles, manufacture the stake of a soil cement octagon with octagon stake pile-formation machine according to the working method of above-mentioned octagon stake pile-formation machine, protruding trapezoidal recessed trapezoidal, the soil cement octagon stake right-hand member that is fit to left side rectangular pile right-hand member that makes soil cement octagon stake left end between every two concrete rectangular stakes protruding trapezoidal is fit to the recessed trapezoidal of the right concrete rectangular stake left end; When the soil cement intensity of octagon stake reaches a timing, manufacture respectively a concrete rectangular stake in the rear and front end of each octagon stake again, protruding trapezoidal recessed trapezoidal, the octagon stake rear end that is fit to the stake of front end concrete rectangular that makes octagon stake front end protruding trapezoidal is fit to the recessed trapezoidal of rear end concrete rectangular stake; So form concrete rectangular stake and the anterior piling wall of mutually pegging graft with the rectangular pile at rear portion of octagon stake between the stake of multiple soil cement octagon and every two octagon stakes, for gear soil, the antiseep of building foundation.
2. octagon stake according to claim 1 and rectangular pile cross docking device, is characterized in that: the protruding trapezoidal of the recessed trapezoidal and place, every limit of octagon at two ends, two rectangular pile left and right coincide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610123508.XA CN105604049A (en) | 2016-03-06 | 2016-03-06 | Equipment for cross-shaped insertion connection of regular octagonal piles and rectangular piles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610123508.XA CN105604049A (en) | 2016-03-06 | 2016-03-06 | Equipment for cross-shaped insertion connection of regular octagonal piles and rectangular piles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105604049A true CN105604049A (en) | 2016-05-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610123508.XA Withdrawn CN105604049A (en) | 2016-03-06 | 2016-03-06 | Equipment for cross-shaped insertion connection of regular octagonal piles and rectangular piles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105604049A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604050A (en) * | 2016-03-06 | 2016-05-25 | 陈兆英 | Equipment for cross-shaped locking of regular octagonal piles and rectangular piles |
| CN105672298A (en) * | 2016-03-06 | 2016-06-15 | 陈兆英 | Y-shaped engagement wall forming equipment for octagonal piles and rectangular piles |
| CN105908730A (en) * | 2016-06-29 | 2016-08-31 | 李琳琳 | Locked combined cross sequence pile |
| CN106049472A (en) * | 2016-06-29 | 2016-10-26 | 李琳琳 | Combined cross-shaped sequence pile |
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| CN201962688U (en) * | 2010-12-02 | 2011-09-07 | 中交四航局第一工程有限公司 | Diaphram wall wharf pile foundation structure |
| JP2013019260A (en) * | 2011-06-17 | 2013-01-31 | Nagaigumi Co Ltd | Drilling equipment and construction method for sheet pile |
| CN105178296A (en) * | 2015-08-09 | 2015-12-23 | 朱艳菊 | H-shaped mixing pile equipment |
| CN105604050A (en) * | 2016-03-06 | 2016-05-25 | 陈兆英 | Equipment for cross-shaped locking of regular octagonal piles and rectangular piles |
| CN105604051A (en) * | 2016-03-06 | 2016-05-25 | 陈兆英 | Equipment for cross-shaped locking of regular octagonal piles and rectangular piles |
| CN105804641A (en) * | 2016-03-06 | 2016-07-27 | 陈兆英 | Equipment for cross-shaped inserted buckling of regular octagonal piles and rectangular piles |
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2016
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201962688U (en) * | 2010-12-02 | 2011-09-07 | 中交四航局第一工程有限公司 | Diaphram wall wharf pile foundation structure |
| JP2013019260A (en) * | 2011-06-17 | 2013-01-31 | Nagaigumi Co Ltd | Drilling equipment and construction method for sheet pile |
| CN105178296A (en) * | 2015-08-09 | 2015-12-23 | 朱艳菊 | H-shaped mixing pile equipment |
| CN105604050A (en) * | 2016-03-06 | 2016-05-25 | 陈兆英 | Equipment for cross-shaped locking of regular octagonal piles and rectangular piles |
| CN105604051A (en) * | 2016-03-06 | 2016-05-25 | 陈兆英 | Equipment for cross-shaped locking of regular octagonal piles and rectangular piles |
| CN105804641A (en) * | 2016-03-06 | 2016-07-27 | 陈兆英 | Equipment for cross-shaped inserted buckling of regular octagonal piles and rectangular piles |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604050A (en) * | 2016-03-06 | 2016-05-25 | 陈兆英 | Equipment for cross-shaped locking of regular octagonal piles and rectangular piles |
| CN105672298A (en) * | 2016-03-06 | 2016-06-15 | 陈兆英 | Y-shaped engagement wall forming equipment for octagonal piles and rectangular piles |
| CN105908730A (en) * | 2016-06-29 | 2016-08-31 | 李琳琳 | Locked combined cross sequence pile |
| CN106049472A (en) * | 2016-06-29 | 2016-10-26 | 李琳琳 | Combined cross-shaped sequence pile |
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Application publication date: 20160525 |
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