CN113982020A - Combined suction anchor with deviation correcting and quick sinking functions and using method thereof - Google Patents
Combined suction anchor with deviation correcting and quick sinking functions and using method thereof Download PDFInfo
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- CN113982020A CN113982020A CN202111338821.2A CN202111338821A CN113982020A CN 113982020 A CN113982020 A CN 113982020A CN 202111338821 A CN202111338821 A CN 202111338821A CN 113982020 A CN113982020 A CN 113982020A
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- suction anchor
- barrel body
- grouting
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- top surface
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- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims abstract description 8
- 239000011440 grout Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims 4
- 239000003651 drinking water Substances 0.000 claims 1
- 235000020188 drinking water Nutrition 0.000 claims 1
- 239000004568 cement Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/24—Foundations constructed by making use of diving-bells
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- 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
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/0073—Details of sea bottom engaging footing
- E02B2017/0078—Suction piles, suction cans
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- 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
- E02D2200/1678—Shapes triangular
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a combined suction anchor with functions of rectifying deviation and rapidly sinking and a using method thereof, wherein the suction anchor comprises a hollow barrel body with an open bottom and a horizontally closed top surface, and the top surface of the barrel body is provided with a water pumping hole, and the combined suction anchor is characterized in that: two inclination sensors which are vertically fixed mutually are installed on the top surface of the barrel body, a group of vibration exciters which can normally work underwater are symmetrically fixed on the edge of the top surface of the barrel body, an inner guide plate is additionally installed on the inner side of the barrel body below each vibration exciter, a group of outer guide plates which are symmetrical to the inner guide plates are fixed on the outer side of the barrel wall, a grouting pipe is preset in each outer guide plate, the upper end of each grouting pipe can be connected with an external grouting device through a grouting main pipe, a grouting hole is formed in the lower end of each grouting pipe, and the grouting hole is formed in the outer guide plates. The invention has the technical advantages of capability of preventing the suction anchor from inclining, quick construction progress and good pulling resistance.
Description
Technical Field
The invention belongs to a combined suction anchor, and particularly relates to a combined suction anchor capable of correcting deviation, quickly sinking and then grouting and a using method thereof.
Background
In recent years, with the increasing social demand for energy, the national energy strategy is moving to the deep blue, so that offshore oil platforms are gradually built in deep sea areas, offshore wind power generators also become hot projects, an anchoring technology is one of key technologies of offshore structure platforms, the novel basic type of the suction anchor makes up the defects that the traditional fixed shallow sea offshore engineering structures such as a jacket platform and a gravity type platform are heavy in self weight, the construction cost is greatly increased along with the water depth and the like, and the suction anchor is suitable for soft soil foundations and severe marine environments and has the advantages of low construction cost, simplicity and convenience in construction and the like.
The suction anchor structure is an inverted barrel-shaped structure body, generally made of steel or reinforced concrete, the top end of the suction anchor structure is provided with a water pumping hole for connecting a negative pressure water pumping system, the suction anchor structure firstly sinks into the seabed by means of self gravity during installation, a closed space is formed between a pile body and soil at the moment, after the penetration depth is stable, water is pumped by means of a negative pressure pump to form vacuum, a pressure difference is formed in the suction anchor at the moment, and the suction anchor finally sinks to the designed depth under the action of the pressure difference. However, due to the influence of factors such as extreme severe marine environment, complex geological conditions, diversity of seabed soil layer distribution and the like, the pressure difference formed by the suction anchor by the dead weight and the negative pressure pump alone is difficult to sink to the designed depth ideally, or the barrel body is inclined in the sinking process, the requirement of allowable verticality cannot be met, the sinking process consumes a long time, the marine environment is changeable instantly, the longer the construction time is, the more adverse the construction is, and the shorter the suction anchor sinking time is, the better the construction is. If the suction anchor can be improved to have the functions of deviation correction and rapid sinking on the basis of self weight and pressure difference, the problems of inclination, insufficient depth and slow sinking speed in the sinking process of the suction anchor can be well solved.
Disclosure of Invention
The invention aims to solve the problems in the background art and provide a combined suction anchor with the functions of deviation correction and quick sinking.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the combined suction anchor with the functions of rectifying deviation and sinking quickly comprises a hollow barrel body with the bottom opened, the top surface horizontally sealed, and the top surface of the barrel body is provided with water pumping, two inclination angle sensors which are vertically fixed mutually are installed on the top surface of the barrel body, a group of vibration exciters which can normally work underwater are symmetrically fixed on the edge of the top surface of the barrel body, an inner guide sheet is additionally installed on the inner side of the barrel body below each vibration exciter, a group of outer guide sheets which are symmetrical to the inner guide sheets are fixed on the outer side of the barrel wall, a grouting pipe is preset in each outer guide sheet, the upper end of each grouting pipe can be connected with an external grouting device through a grouting main pipe, the lower end of each grouting pipe is provided with a grout outlet, and the grout outlet is formed in the outer guide sheets.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the length direction of the inner guide sheet is parallel to the axial direction of the barrel body.
The number of the vibration exciters is 8, and the vibration exciters are arranged on the top surface of the barrel body at equal intervals.
The lower end of the inner guide piece is in a sharp blade shape, the manufacturing material is high-strength steel, the rest parts are equal-thickness parts, the thickness is 4-6 cm, the width is 0.05-0.1 time of the diameter of the barrel body, and the length is the same as the length of the barrel body.
The lower end of the outer guide piece is in a sharp blade shape, the outer guide piece is made of high-strength steel, the rest of the outer guide piece is in a shape of a rhombohedral column, the section of the rhombohedral column is an isosceles triangle with a base angle of 75 degrees, the bottom edge of the rhombohedral column is welded on the barrel body, the length of the bottom edge is 0.05-0.1 time of the diameter of the barrel body and is not less than 8cm, and the grouting pipe is arranged in the rhombohedral column.
The grout outlet holes of the grouting pipe are formed in two side walls of the three-diamond column of the outer guide piece, and the distance between the holes is 1/4 with the length of a barrel.
The use method of the combined suction anchor with the functions of deviation correction and quick sinking is characterized in that: the method comprises the following steps:
firstly, hanging a suction anchor into water, sinking and cutting the suction anchor into the sea bottom to a certain depth by utilizing the self weight of the suction anchor, and enabling a drain hole at the top of a barrel body to be in an open state all the time in the process;
step two, after the suction anchor sinks stably by the dead weight, connecting a drain hole with a water pumping system, starting to extract water in the barrel, forming pressure difference inside and outside the barrel under the action of a negative pressure pump, starting to sink the barrel body continuously under the action of the pressure difference, monitoring the sinking verticality of the barrel body in real time through two inclination angle sensors at the top of the barrel, starting vibration exciters in the opposite directions of the deflections to correct the deviation when the barrel body is deflected in the sinking process, starting all the vibration exciters when the barrel body is difficult to sink again by the pressure difference and the dead weight, and increasing the sinking speed by the integral vibration of the suction anchor;
and step three, the suction anchor sinks to the preset depth, the drain hole is closed after the suction anchor contacts the seabed, grouting is conducted on the grouting pipe through the grouting main pipe, the grout permeates along a gap formed between the seabed soil body and the barrel body after vibration and is mixed with the surrounding soil body, grouting is stopped when a certain grouting amount is achieved, and the construction process is finished.
The invention has the following advantages:
(1) the top surface of the barrel body is provided with the inclination angle sensor and the vibration exciters, wherein the vibration exciters are symmetrically arranged on the top of the barrel body right above the inner guide sheet, and each vibration exciter can vibrate respectively or together. Whether the barrel body deflects is sensed through the tilt angle sensor, and if the barrel body deflects, a vibration exciter on the opposite direction of the deflection is started to correct the deviation. Through the arrangement, the suction anchor can be always kept in a reasonable verticality range in the sinking process, and the side turning of the suction anchor is prevented.
(2) The invention can accelerate the sinking speed by starting all the vibration exciters and relying on the integral vibration of the suction anchor, and reduce the construction time, thereby being better suitable for the environment with marine instantaneous and variable conditions.
(3) Because the invention adopts the combined structure of the inner guide sheet and the outer guide sheet, the contact area between the bucket body and the soil body can be effectively increased, the total side friction resistance can be improved, and the ultimate uplift bearing capacity of the suction anchor can be improved.
(4) After the suction anchor is sunk in place, a grouting process is adopted, so that cement paste can be filled into gaps around the suction anchor, which are generated due to vibration sinking, and the cement paste is mixed with soil around the suction anchor, so that the performance of the soil is improved, and the ultimate uplift bearing capacity of the suction anchor is improved.
Drawings
FIG. 1 is an external perspective view of a modular suction anchor of the present invention with deviation rectification;
FIG. 2 is a perspective view of the interior of the combination suction anchor with deviation rectifying function of the present invention;
fig. 3 is an enlarged view of the inner and outer guide vanes.
Wherein the reference numerals are: the device comprises an inclination angle sensor 1, a vibration exciter 2, a grouting main pipe 3, a grouting pipe 4, a water pumping hole 5, an outer guide sheet 6, a grout outlet hole 7, a barrel body 8 and an inner guide sheet 9.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in figure 1 and figure 2, the combined suction anchor with the functions of rectifying deviation and rapidly sinking comprises a barrel body 8 with an open bottom and a sealed top, wherein a drain hole 5 is arranged at the center of the top of the barrel body, the bottom end of the barrel body is in a sharpened blade shape, two mutually vertical inclination angle sensors 1 are fixed at the top end of the barrel body, eight inner guide blades 9 are symmetrically welded at the inner edge of the barrel body respectively, an underwater electric vibration exciter 2 is fixed at the top end of each guide blade, namely the edge of the top of the barrel body, eight outer guide blades 6 are welded at the outer edge of the barrel wall corresponding to each inner guide blade, and a grouting pipe 4 is preset in each outer guide blade.
As shown in fig. 1, the vibration exciter 2 is a vibration exciter capable of normally working under water, and is fixed on the outer edge of the top end of the barrel body, so that the vibration exciter can be controlled to vibrate independently or together, the function of deviation rectification is achieved when the vibration exciter vibrates independently, and the function of overall rapid sinking is achieved when the vibration exciter vibrates together.
As shown in fig. 1, the tilt sensor 1 can transmit the verticality of the suction anchor barrel 8 to a worker in real time, and the worker controls whether each vibration exciter 2 vibrates, so that the functions of correcting deviation and rapidly sinking are achieved.
As shown in fig. 2, the grouting pipe 4 is pre-embedded in the outer guide piece, the grout outlet 7 is arranged on the side wall of the outer guide piece, the distance between the grout outlet holes is 1/4 with barrel height, in order to prevent the grout outlet 7 from being blocked in sinking, the grout outlet can be firstly sealed by rubber and other materials, and the rubber can be extruded out under the action of grouting pressure during grouting.
As shown in fig. 2 and 3, the inner guide plate 9 is welded to the inner wall of the barrel 8, the exciter 2 is mounted at the top of the inner guide plate, i.e., the outer edge of the top of the barrel, and the inner guide plate can not only enhance the rigidity of the barrel, but also guide and prevent deflection. The height of the inner guide piece is the same as that of the barrel body, and the width of the inner guide piece is 0.05-0.1 time of the diameter of the barrel body. The front 0.5m of the guide sheet in the height direction is a tip part, the bottom of the tip is a blade edge so as to cut into a soil body, the rest parts are thickness-equalizing parts, and the thickness of each thickness-equalizing part is 4-6 cm.
The use method of the combined suction anchor with the functions of deviation correction and quick sinking is characterized in that: the method comprises the following steps:
firstly, hanging a suction anchor into water, sinking and cutting the suction anchor into the sea bottom to a certain depth by utilizing the self weight of the suction anchor, and opening a drain hole 5 at the top of a barrel body 8 in the process;
step two, after the suction anchor sinks stably by self weight, connecting a drain hole 5 with a water pumping system, starting to extract water in the barrel, forming pressure difference inside and outside the barrel under the action of a negative pressure pump, starting to sink the barrel body 8 continuously under the action of the pressure difference, monitoring the sinking verticality of the barrel body 8 in real time through two inclination angle sensors 1 at the top of the barrel, starting vibration exciters 2 in the opposite directions of deflection to correct when the barrel body 8 sinks in the sinking process, starting all the vibration exciters 2 when the barrel body is difficult to sink again under the pressure difference and the self weight, and increasing the sinking speed by the integral vibration of the suction anchor;
and step three, the suction anchor sinks to the preset depth, the drain hole 5 is closed after the suction anchor contacts the seabed, grouting is conducted on the grouting pipe 4 through the grouting main pipe 3, the grout permeates through a gap formed between the seabed soil body and the barrel body 8 when sinking along vibration, grouting is stopped when a certain grouting amount is reached, and the construction process is finished.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (7)
1. Combination formula suction anchor with rectify and sink function fast opens including a bottom, and the horizontal confined cavity staving of top surface (8), drinking-water hole (5), characterized by have been seted up to the staving top surface: staving (8) top surface installation two perpendicular fixed inclination sensor (1) of each other, staving (8) top surface edge symmetry is fixed a set of vibration exciter (2) that can normally work under water, the inboard of the staving of every vibration exciter (2) below installs one additional interior guide piece (9), fixed a set of outer guide piece (6) of being symmetrical with interior guide piece (9) outside the bucket wall, a slip casting pipe (4) all predetermine in the inside of every outer guide piece (6), slip casting pipe (4) upper end can be connected with external slip casting device through slip casting house steward (3), the lower extreme has grout outlet (7), grout outlet (7) are seted up on outer guide piece (6).
2. The combined suction anchor with deviation rectifying and quick sinking functions as claimed in claim 1, wherein: the length direction of the inner guide sheet (9) is parallel to the axial direction of the barrel body (8).
3. The combined suction anchor with deviation rectifying and quick sinking functions as claimed in claim 2, wherein: the number of the vibration exciters (2) is 8, the vibration exciters are arranged on the top surface of the barrel body (8) at equal intervals, and the upper part of each group of the inner guide piece and the outer guide piece is right above.
4. The combined suction anchor with deviation rectifying and quick sinking functions as claimed in claim 3, wherein: the lower end of the inner guide piece (9) is in a sharp blade shape, the manufacturing material is high-strength steel, the rest parts are equal-thickness parts, the thickness is 4-6 cm, the width is 0.05-0.1 time of the diameter of the barrel body (8), and the length is the same as that of the barrel body (8).
5. The combined suction anchor with deviation rectifying and quick sinking functions as claimed in claim 4, wherein: the lower end of the outer guide sheet (6) is in a sharp blade shape, the manufacturing material is high-strength steel, the rest part of the outer guide sheet is in a shape of a rhombohedral column, the section of the rhombohedral column is an isosceles triangle with a base angle of 75 degrees, the bottom edge of the rhombohedral column is welded on the barrel body (8), the length of the bottom edge is 0.05-0.1 time of the diameter of the barrel body (8) and is not less than 8cm, and the grouting pipe (4) is arranged in the rhombohedral column.
6. The combined suction anchor with deviation rectifying and quick sinking functions as claimed in claim 5, wherein: the grout outlet (7) of the grouting pipe (4) is arranged on two side walls of the three-diamond column of the outer guide sheet (6), and the distance between the openings is 1/4 with the length of a barrel.
7. The method for using the combined suction anchor with functions of rectifying deviation and rapidly sinking as claimed in claim 1, wherein: the method comprises the following steps:
firstly, a suction anchor is hung in water and sinks to cut into the sea bottom to a certain depth by utilizing the self weight of the suction anchor, and a drain hole (5) at the top of a barrel body (8) is always in an open state in the process;
step two, after the suction anchor sinks stably by self weight, connecting a drain hole (5) with a water pumping system, starting to extract water in the barrel, forming pressure difference inside and outside the barrel under the action of a negative pressure pump, starting to sink the barrel body (8) continuously under the action of the pressure difference, monitoring the sinking verticality of the barrel body (8) in real time through two inclination angle sensors (1) at the top of the barrel, starting a vibration exciter (2) in the opposite direction of the deflection to correct the deflection when the barrel body (8) sinks, starting all the vibration exciters (2) when the barrel body is difficult to sink again by the pressure difference and the self weight, and increasing the sinking speed by the integral vibration of the suction anchor;
and step three, the suction anchor sinks to the preset depth, the drain hole (5) is closed after the lower surface of the top plate of the bucket body contacts the seabed, grouting is conducted on the grouting pipe (4) through the grouting main pipe (3), the grout permeates along a gap formed between the vibrated seabed soil body and the bucket body (8) and is mixed with the surrounding soil body, grouting is stopped when a certain grouting amount is achieved, and the construction process is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111338821.2A CN113982020A (en) | 2021-11-12 | 2021-11-12 | Combined suction anchor with deviation correcting and quick sinking functions and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111338821.2A CN113982020A (en) | 2021-11-12 | 2021-11-12 | Combined suction anchor with deviation correcting and quick sinking functions and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113982020A true CN113982020A (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111338821.2A Pending CN113982020A (en) | 2021-11-12 | 2021-11-12 | Combined suction anchor with deviation correcting and quick sinking functions and using method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113982020A (en) |
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2021
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Application publication date: 20220128 |
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