CN109469053B - Rotary steel pipe pile suitable for coral island geology and use method thereof - Google Patents
Rotary steel pipe pile suitable for coral island geology and use method thereof Download PDFInfo
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- CN109469053B CN109469053B CN201811243038.6A CN201811243038A CN109469053B CN 109469053 B CN109469053 B CN 109469053B CN 201811243038 A CN201811243038 A CN 201811243038A CN 109469053 B CN109469053 B CN 109469053B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 235000014653 Carica parviflora Nutrition 0.000 title claims abstract description 35
- 241000243321 Cnidaria Species 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims description 21
- 238000004062 sedimentation Methods 0.000 claims description 7
- 239000011268 mixed slurry Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 abstract description 26
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 241001494479 Pecora Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
-
- 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
- E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/22—Placing by screwing down
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
- E02D2250/0076—Drilling
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (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 invention discloses a rotary steel pipe pile suitable for coral island geology and a use method thereof, and relates to the technical field of ocean engineering. The application mainly comprises the following steps: determining the driving position of the pile body; annular drilling and crushing to form an annular crushing belt; at the same time: the mud is injected downwards along the outer wall of the pile body, so that the mud is mixed with the crushed slag, compressed air is injected at the sawtooth group along the inner wall of the pile body, so that the pressure difference is formed in the pile body, the mixed mud and the crushed slag rise along the inner wall of the pile body and are discharged, and a channel is formed in the inner wall and the outer wall of the pile body; and after the pile body reaches the target position and the slag is removed, grouting slurry along the channel. The method has the advantages that disturbance to the calcareous sand stratum is reduced to the greatest extent, structural stability of the calcareous sand stratum is protected, a grouting channel is created at the same time, and a grouting technology is assisted to tightly combine the steel pipe pile and the calcareous sand stratum, so that stratum strength is enhanced, and foundation bearing capacity is enhanced.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a rotary steel pipe pile suitable for coral island geology and a use method thereof, and relates to rock-soil reinforcement and foundation bearing of coral island geology.
Background
The coral reef is a special rock-soil body formed by the actions of breaking, carrying, stacking, cementing and the like of remains of hermatypic coral after death, and the main component of the coral reef is calcium carbonate, and the stratum is mainly composed of calcareous sand. Because of the special biological cause, the coral reef soil has the engineering characteristics of low density, porous, easy breaking, high compression, strong structural property, large brittleness, strength anisotropy, easy cementation phenomenon among particles and the like, and the influence of the surrounding seawater medium, the coral reef soil has great difference with the conventional land rock soil. According to detection, island foundations are mostly composed of calcareous sand, particles are fragile, a large amount of particles can be broken under a shearing action (such as vertical downward penetration), the breaking of edges and corners of gravel and grinding among the particles greatly influence the mechanical bearing characteristics of the calcareous sand, and rock-soil performance indexes such as a foundation bearing capacity allowable value, a pile side friction resistance standard value and the like are lower than those of common land rocks, so that the pulling resistance and bending resistance bearing capacity of a driven pile foundation are greatly influenced. Numerous experimental and engineering examples have shown that pile foundation piling methods based on conventional geotechnical geology are not applicable in calcareous sand.
In addition, the pile forming method has a great influence on pile side friction resistance. Because the soil compaction effect of the calcareous sand is not obvious, the pile side friction resistance and the pile end resistance of the pile foundation are lower, and the bearing capacity of the coral reef soil calcareous sand pile foundation is directly low. Therefore, the traditional pile forming mode is changed, the degree of crushing and structural damage to island calcium sand particles when pile foundation is penetrated in the early stage is reduced, and the danger that the calcium sand stratum is broken or even collapses due to huge stress is avoided; the later stage is assisted by grouting technology, the solidified slurry material is injected into stratum particles nearby the pile foundation through a grouting machine, the stratum strength is enhanced, the pipe pile and the foundation are solidified into a whole, the stratum permeability is reduced, the foundation is prevented from sedimentation and deformation damage, the method is an important research direction for solving the current problem, and the current pile foundation construction method for coral reef geology is less.
The method adopted in the 'steel pipe pile suitable for coral reef geology' patent of patent number CN201620547227.2 and the 'steel pipe pile suitable for coral reef geology and grouting method thereof' patent of patent number CN201610403979.6 is a drilling and grouting pile forming process, and the patent focuses on how grouting reinforcement is performed after steel pipes are driven to improve the foundation bearing capacity in the coral reef geology.
Patent number CN201610383994. X 'steel pipe composite pile foundation suitable for deep water and coral reef geology' patent describes a concrete pile body and a steel pile casing structure added outside the pile body so as to achieve the purpose of increasing foundation bearing capacity, especially horizontal bearing capacity.
The method can partially improve the bearing capacity of the pile foundation in the later coral reef geology, but neglects disturbance of the soil body of the coral reef stratum and even structural damage during the drilling of the earlier drilling machine, and has very important influence on the bearing capacity of the pile foundation in the coral reef geology.
Disclosure of Invention
The invention aims to design a rotary steel pipe pile suitable for coral island geology and a use method thereof, aiming at the problems that when a steel pipe pile is installed, calcareous sand particles in a coral reef stratum are excessively crushed, the structure is seriously damaged, the installation of a driven pile fails or the surrounding calcareous sand stratum structure is unstable after pile formation is carried out, the bearing capacity is too low and the like.
The technical scheme of the invention for achieving the purpose is that the rotary steel pipe pile suitable for coral island geology comprises a cylindrical pile body, wherein the pile body is hollow; the connecting top cover is arranged at the top end of the pile body and is used for connecting rotary power equipment, a reverse circulation suction device and grouting equipment; and the plurality of groups of saw teeth are arranged at the bottom end of the pile body and are used for crushing and drilling stratum.
Further, the sawtooth group includes interior sawtooth and outer sawtooth, interior sawtooth sets up the inboard at the pile body, outer sawtooth sets up the outside at the pile body, interior sawtooth and outer sawtooth form the sheep horn shape of inversion.
Further, the outer top edge of the outer sawtooth is arranged at an oblique angle with the side wall of the pile body, and the outer top edge of the inner sawtooth is arranged at an oblique angle with the side wall of the pile body.
Further, the oblique angle between the outer top edge of the outer sawtooth and the side wall of the pile body is 45 degrees, and the oblique angle between the outer top edge of the inner sawtooth and the side wall of the pile body is 45 degrees.
Further, the sawtooth group further comprises middle sawteeth, and the middle sawteeth are arranged right below the side wall of the pile body.
Further, the connecting top cover is an external thread cover.
Further, the number of the sawtooth groups is 6.
Further, the ratio of the wall thickness to the outer diameter of the pile body is 0.05-0.2.
The application method of the rotary steel pipe pile suitable for coral island geology comprises the following steps:
a: mounting the pile body on an external power mechanical device by utilizing a connecting top cover, and determining the driving position of the pile body;
b: annular drilling and crushing are carried out on coral reef stratum soil by using the sawtooth group, so that an annular crushing belt is formed; at the same time: the mud is injected downwards along the outer wall of the pile body, so that the mud is mixed with the crushed slag, compressed air is injected at the sawtooth group along the inner wall of the pile body, so that the pressure difference is formed in the pile body, the mixed mud and the crushed slag rise along the inner wall of the pile body and are discharged, and a channel is formed in the inner wall and the outer wall of the pile body;
c: stopping injecting slurry after the pile body reaches the target position and the slag is removed, injecting slurry along the channel, and stopping injecting slurry after the slurry overflows from the orifice of the channel;
d: separating the pile body from the external power mechanism.
In the step B, the mixed slurry and the crushed slag are collected into a sedimentation tank, and the slurry is recycled after being sedimented and purified by the sedimentation tank.
The beneficial effects of the invention are as follows: the rotary drilling can reduce the running resistance and effectively reduce the disturbance and structural damage to the calcareous sand soil layer around the foundation; the steel pipe pile is clear Kong Paizha, and the pressure can enable the fine particles of the slurry to permeate into gaps of the calcareous sand to fill the fine gaps of the structure, so that the bearing capacity of the center reserved soil is enhanced. After the hole is drilled and cleaned, a grouting channel is formed, grouting is performed along the channel for grouting reinforcement, the stratum strength of the coral reef is enhanced, and the bearing capacity of the foundation is improved. The disturbance to the calcareous sand stratum is reduced to the greatest extent, the structural stability of the calcareous sand stratum is protected, a grouting channel is created at the same time, and the grouting technology is assisted to tightly combine the steel pipe pile and the calcareous sand stratum, so that the stratum strength is enhanced, and the bearing capacity of the foundation is enhanced.
Drawings
Fig. 1 is a schematic structural view of a steel pipe pile according to the present application;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a cross-sectional view at A-A in fig. 2.
Fig. 4 is a schematic view of a state in which a steel pipe pile is drilled down;
fig. 5 is a schematic view showing a state in which the slag removal of the steel pipe pile is completed;
fig. 6 is a schematic diagram of a state of grouting a steel pipe pile.
In the above figures, 1, a steel pipe pile; 2. connecting a top cover; 3. a sawtooth group; 31. inner saw teeth; 32. an outer serration; 33. middle saw teeth.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the accompanying drawings and preferred embodiments:
the utility model provides a rotatory steel-pipe pile suitable for coral island geology, as shown in fig. 1 through 3, includes cylindrical pile body 1, and this pile body 1 is hollow form, and hollow pile body is used for injecting the thick liquid body, and the stake mouth size and the stake wall thickness of this pile body 1 decide according to actual engineering needs, according to the experiment, and the wall thickness of pile body 1 is 0.05-0.2 with the external diameter ratio, can obtain better result of use. The top end of the pile body 1 is provided with a connecting top cover 2, the connecting top cover 2 is used for connecting external rotation power equipment, a reverse circulation suction device and grouting equipment, the connecting top cover can be an external thread cover, and the downward rotation direction of the pile body 1 is the same as the locking direction of the connecting top cover 2 so as to prevent the pile body 1 from falling off in the downward rotation process.
At the bottom of the pile body 1, several sets of saw tooth sets 3 are arranged for breaking and drilling the stratum. The sawtooth group 3 is of a disposable and unrecoverable sawtooth structure, and is welded at the bottom end of the pile body 1, and the tip part of the sawtooth group is downward. The sawtooth set 3 comprises an inner sawtooth 31 and an outer sawtooth 32, the inner sawtooth 31 is arranged on the inner side of the pile body 1, the outer sawtooth 32 is arranged on the outer side of the pile body 1, the size of the outer sawtooth is about 1% -10% of the caliber of the pile body according to the caliber of the pile body, the inner sawtooth 31 and the outer sawtooth 32 are in inverted triangle shapes, the inner sawtooth 31 and the outer sawtooth 32 form inverted sheep-shaped angles, the outer top edge of the outer sawtooth 32 is arranged at an oblique angle with the side wall of the pile body 1, the outer top edge of the inner sawtooth 31 is arranged at an oblique angle with the side wall of the pile body 1, the oblique angle is 45 degrees, and the oblique angle can be designed according to practical conditions and is not specifically limited. In the downward rotation process of the pile body 1, both sides of the side wall of the pile body 1 are used for cutting coral reef geology, and an annular cavity is formed at both sides of the side wall of the pile body, so that all soil bodies around the pile wall are broken, the steel pipe pile penetration speed is improved, pile forming quality is guaranteed, and construction time is saved. In the figure, the number of the sawtooth groups 3 is 6, and the number needs to be considered according to multiple factors such as the material, the structure and the coral reef of the sawtooth groups 3. On the basis of the above, the sawtooth group 3 further comprises a middle sawtooth 33, the middle sawtooth 33 is arranged right below the side wall of the pile body 1, forms radial drilling angles with the inner sawtooth 31 and the outer sawtooth 32, and improves the drilling effect of the pile body 1.
In use, the rotary steel pipe pile is mounted on a power unit capable of providing downward rotation. When the steel pipe pile is rotationally drilled, two sides of the pipe wall of the broken steel pipe pile are close to soil, the rotary drilling is carried out, the running-through resistance is obviously reduced, the original structure of the original coral reef calcareous sand stratum is protected to the greatest extent, the structure breakage of the stratum calcareous sand structure when the stratum calcareous sand structure is subjected to huge impact stress is avoided, pile formation inclination is prevented, even the pile formation failure is prevented, the original structural integrity of the coral reef stratum is maintained, and the later-stage foundation bearing capacity is improved.
The application provides a use method for the rotary steel pipe pile, and the main thinking is as follows: the steel pipe pile is used as a tunneling mechanism, so that the working procedure is simplified; the pile body is rotated for drilling, so that the tubular pile penetration resistance is reduced, the disturbance and structural damage to the stratum calcareous sand soil layer around the drilling pit can be effectively reduced, and the influence on piling at other adjacent positions is avoided; the inner side, the outer side and the bottom of the pipe wall are provided with saw tooth structures, so that soil bodies on the inner side, the outer side and the bottom of the pipe wall can be crushed; drilling and hole cleaning are carried out simultaneously; after finishing, the inner and outer walls and the bottom of the steel pipe pile form grouting channels, grout is injected along the channels and combined with the center of the steel pipe, the bottom and the external foundation soil body, the strength of the coral reef stratum is enhanced, the bearing capacity of the foundation is improved, and the concrete reference is made to fig. 4 to 6, and the method comprises the following steps:
a: the pile body 1 is mounted to an external power machine by using the connection top cover 2, and the driving position of the pile body 1 is determined.
B: annular drilling and crushing are carried out on coral reef stratum soil by using the sawtooth group 3 to form an annular crushing belt; at the same time: the mud is injected downwards along the outer wall of the pile body 1, so that the mud is mixed with the crushed slag, compressed air is injected into the sawtooth group 3 along the inner wall of the pile body 1 through an air compressor, so that pressure difference is formed between the inside and the outside of the pile body 1, the mixed mud and the crushed slag rise along the inner wall of the pile body 1 and are discharged, and a channel is formed on the inner wall and the outer wall of the pile body 1. The gas, sand and slurry mixture with the apparent density smaller than that of the slurry is formed in the steel pipe pile, so that a large pressure difference is formed between the inside and the outside of the steel pipe pile, and the slurry pressure on the outside pushes the gas, sand and slurry mixture on the inside of the steel pipe pile to rise along the inner wall of the steel pipe pile together with part of slurry and be discharged, thereby achieving the effect of removing the sediment at the bottom of the pile. In the hole cleaning process, slurry mixed liquid flows upwards along the inner wall of the pile body 1 from bottom to top under the action of huge pressure, fine particles in slurry permeate into the unbroken calcium sand column at the inner center of the pile body 1 under the action of pressure in the flowing process, the calcium sand column is reserved completely, structural holes of the calcium sand are filled, and after the later solidification, the strength and the bearing capacity of the calcium sand are improved. In the step, in order to save the slurry and reduce the cost, the mixed slurry and the crushed slag are collected into a sedimentation tank, and the slurry is recycled after being sedimentated and purified by the sedimentation tank, so that a complete slurry circulation system is formed.
C: after the pile body 1 reaches the target position and the slag is removed, the slurry injection is stopped, inner wall gap channels without slag are formed at the two sides of the wall of the steel pipe pile and the bottom of the steel pipe pile, high-pressure grouting equipment is replaced to inject slurry along the channels, so that the slurry is injected into the lower part of the inner wall channels and is infiltrated into the rock soil in the steel pipe, when the slurry is downwards poured to the bottom end, the slurry flows into one side of the outer wall channels through the gaps of the 3 structures of the bottom saw tooth groups, one part of the slurry is infiltrated into the soil at the side and the lower part of the outer wall under the action of high pressure, the other part of the slurry is upwards spread along the outer wall channels to be filled on the surface of a stratum, and the slurry injection is stopped. And combining the steel pipe piles and the coral island stratum into a whole, thereby improving the bearing capacity of the foundation.
D: and separating the pile body 1 from an external power mechanical device, and completing the installation of the steel pipe pile.
On the basis, each device is moved to carry out the construction of the next pipe pile.
The invention has been described above with reference to preferred embodiments, but the scope of the invention is not limited thereto, various modifications may be made thereto and equivalents may be substituted for elements thereof without structural conflict, technical features mentioned in the various embodiments may be combined in any way, and any reference signs in the claims shall not be construed as limiting the claims concerned, the embodiments shall be construed as exemplary and non-limiting in all respects. Therefore, any and all technical solutions falling within the scope of the claims are within the scope of the present invention.
Claims (2)
1. The application method of the rotary steel pipe pile suitable for coral island geology is characterized by comprising the following steps of:
the rotary steel pipe pile includes:
a cylindrical pile body (1), wherein the pile body (1) is hollow;
the connecting top cover (2) is arranged at the top end of the pile body (1) and is used for connecting rotary power equipment, a reverse circulation suction device and grouting equipment;
the plurality of groups of saw tooth groups (3) are arranged at the bottom end of the pile body (1) and are used for crushing and drilling stratum;
the using method comprises the following steps:
a: installing the pile body (1) on an external power mechanical device by utilizing a connecting top cover (2) to determine the driving position of the pile body (1);
b: annular drilling and crushing are carried out on coral reef stratum soil by using the sawtooth group (3) to form an annular crushing belt; at the same time:
the slurry is injected downwards along the outer wall of the pile body (1) to mix the slurry and the crushed slag,
compressed air is injected into the sawtooth group (3) along the inner wall of the pile body (1) to ensure that the pressure difference is formed between the inside and the outside of the pile body (1),
the mixed slurry and the crushed slag rise along the inner wall of the pile body (1) and are discharged, and a channel is formed on the inner and outer walls of the pile body (1);
c: stopping injecting slurry after the pile body (1) reaches a target position and the slag is removed, injecting slurry along the channel, and stopping injecting slurry after the slurry overflows from the orifice of the channel;
d: separating the pile body (1) from the external power mechanical device.
2. The method according to claim 1, wherein in the step B, the mixed slurry and the crushed slag are collected in a sedimentation tank, and the slurry is recycled after being sedimented and purified in the sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811243038.6A CN109469053B (en) | 2018-10-24 | 2018-10-24 | Rotary steel pipe pile suitable for coral island geology and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811243038.6A CN109469053B (en) | 2018-10-24 | 2018-10-24 | Rotary steel pipe pile suitable for coral island geology and use method thereof |
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| CN109469053A CN109469053A (en) | 2019-03-15 |
| CN109469053B true CN109469053B (en) | 2024-01-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111535307B (en) * | 2020-05-22 | 2022-09-06 | 中冀建勘集团有限公司 | Hole forming construction method for rotary drilling cast-in-place pile in reef limestone stratum |
| CN112431195B (en) * | 2020-11-03 | 2022-04-05 | 广西高远建筑科技股份有限公司 | Pile planting and grouting construction method for tubular piles |
| CN118148074B (en) * | 2024-05-09 | 2024-09-06 | 中国海洋大学 | Anti-scouring structure for fusion of artificial fish reef and offshore wind turbine foundation |
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|---|---|---|---|---|
| JPH10266196A (en) * | 1997-03-28 | 1998-10-06 | Tenox Corp | Installation method for pipe and steel pipe pile, and steel pipe pile |
| CN203655291U (en) * | 2013-11-29 | 2014-06-18 | 北京市三一重机有限公司 | Cutting pick holder component and a cutting pick barrel drill |
| CN104603366A (en) * | 2012-08-29 | 2015-05-06 | 大和房屋工业株式会社 | Method for constructing knotted cast-in-place concrete-based pile, and excavation blade-equipped steel pipe |
| CN107574816A (en) * | 2017-09-14 | 2018-01-12 | 广西大学 | Detachable rotation type drilling pile tube and construction method |
| CN210086237U (en) * | 2018-10-24 | 2020-02-18 | 中国海洋大学 | Rotating steel pipe pile suitable for coral island reef geology |
-
2018
- 2018-10-24 CN CN201811243038.6A patent/CN109469053B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266196A (en) * | 1997-03-28 | 1998-10-06 | Tenox Corp | Installation method for pipe and steel pipe pile, and steel pipe pile |
| CN104603366A (en) * | 2012-08-29 | 2015-05-06 | 大和房屋工业株式会社 | Method for constructing knotted cast-in-place concrete-based pile, and excavation blade-equipped steel pipe |
| CN203655291U (en) * | 2013-11-29 | 2014-06-18 | 北京市三一重机有限公司 | Cutting pick holder component and a cutting pick barrel drill |
| CN107574816A (en) * | 2017-09-14 | 2018-01-12 | 广西大学 | Detachable rotation type drilling pile tube and construction method |
| CN210086237U (en) * | 2018-10-24 | 2020-02-18 | 中国海洋大学 | Rotating steel pipe pile suitable for coral island reef geology |
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| CN109469053A (en) | 2019-03-15 |
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