CN109969341A - A kind of the novel slurry filling Screw Anchor and its installation method of expansible multilayer sidewall - Google Patents
A kind of the novel slurry filling Screw Anchor and its installation method of expansible multilayer sidewall Download PDFInfo
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- CN109969341A CN109969341A CN201910238673.3A CN201910238673A CN109969341A CN 109969341 A CN109969341 A CN 109969341A CN 201910238673 A CN201910238673 A CN 201910238673A CN 109969341 A CN109969341 A CN 109969341A
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- anchor
- blade
- anchor body
- annulus
- spiral
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/24—Anchors
- B63B21/26—Anchors securing to bed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
-
- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B2021/505—Methods for installation or mooring of floating offshore platforms on site
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine 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 kind of novel slurry filling Screw Anchors of expansible multilayer sidewall, including anchor head, spiral vanelets, anchor body, the big blade of spiral, anchor tail-hood plate etc., the anchor body is equally divided into several segments, every segment structure is identical, arrange the big blade of one piece of spiral and several blades for being hinged on anchor body, hinged part installs torsional spring, before installation, blade is constrained by constraint annulus and is tightened, constraining on annulus is to have wirerope, wirerope is connect by the wirerope hole of anchor body with the heaving pile annulus on anchor body inner guide, when anchor body spiral injection to designated depth, it can make the constraint of leaf abscission constraint annulus by prestretching guide rod, blade opens under the effect of torsion spring, slip casting is carried out by injected hole after opening completely.The underwater continuous helical injection Sandy Seabed of the present invention, it is easy for installation without excavating；By opening the several layers blade of anchor body, the forced area of anchor body is improved, and then improve anchor body bearing capacity；Slip casting branch pipe built in blade, jet groutinl are remarkably improved the bearing capacity of anchor.
Description
Technical field
The present invention relates to Screw Anchor and its installation method, in particular to a kind of novel slurry filling spiral of expansible multilayer sidewall
Anchor and its installation method.
Background technique
Marine energy sources and development of resources require at sea to build a large amount of floating structure, China coastal seas and South China Sea Deep Water sea area
Petroleum resources abundant are stored, when application ocean platform carries out the exploration and development of petroleum resources, tension leg platform (TLP) (TLP) has
Broad application prospect.Spiral anchor base can agree with the mooring requirement of tension leg platform (TLP) (TLP) very well, have installation simple fast
The characteristics of prompt, without excavation, continuous driving, anchoring excellent performance, overcome traditional anchor foundation installation complexity, needs complicated installation equipment
The shortcomings that, it is the popular direction of the following mooring foundation research.
Screw Anchor installation is relatively simple quick, need to only be lifted Screw Anchor to designated position by installation ship, discharge anchor body,
Apply torque by mounting hole, by helical blade spiral injection to designated position；But when Screw Anchor military service, main hair is carried
It waves and depends on the self weight of anchor body and the soil body to the frictional resistance of anchor body and helical blade, bearing capacity can only obtain limited performance,
To improve the forced area of anchor body and increasing bearing capacity, the novel slurry filling Screw Anchor of expansible multilayer sidewall is proposed.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of novel slurry filling spiral shell of expansible multilayer sidewall
Revolve anchor and its installation method.This kind of anchor type inherits Screw Anchor installation rapid and convenient, without the advantage of excavation, and by comparing letter
Single structure design enables the side wall multilayer of Screw Anchor to open, and increases the forced area of anchor body, and then improve anchor body
Bearing capacity, using MICP technology, jet groutinl keeps flared section blade and seabed soil cementing, improves the bearing capacity of anchor body.
The present invention takes following technical scheme:
A kind of novel slurry filling Screw Anchor of expansible multilayer sidewall, including the big blade of anchor body, spiral, anchor head, spiral leaflet
Piece, guide rod, anchor tail-hood plate, heaving pile hole；Anchor body is equally divided into several segments, and every segment structure is identical；In every section, anchor is as variable cross-section
Structure, upper diameter are greater than lower part, are furnished with the big blade of spiral on top, and lower part be evenly distributed with several blades, each blade upper end and
By being hinged at variable cross-section, all blade tightenings Shi Junyu anchor body lower part is close to, and keeps anchor body lower part integral diameter consistent with top,
Torsional spring is installed to control the maximum opening angle of blade at hinge；Slip casting branch pipe is set in blade；Anchor head is cone structure, is set to
Lowermost anchor body lower end, one spiral vanelets of cloth on anchor head；Anchor tail-hood plate is set to uppermost anchor and holds, and guide rod is vertically
It is set to anchor body inner space, upper end is pierced by anchor tail-hood plate and is equipped with stopper one on guide rod traversing through end, and stopper one is used for
Limitation guide rod moves downward, and heaving pile annulus is arranged on stopper one, is arranged injected hole on heaving pile annulus, inside injected hole and guide rod
The Grouting Pipe connection being equipped with, Grouting Pipe are connected to the slip casting branch pipe in blade；Every layer of blade is tightened under the constraint of constraint annulus,
Wirerope hole is set above every piece of blade, a corresponding pulley is set above each wirerope hole inside the anchor body, constrains annulus by wirerope
It is connected by wirerope hole and pulley with heaving pile annulus corresponding on guide rod；Guide rod moves upwards, and wirerope drives constraint circular motion
Above to blade, the constraint to blade is released, anchor body inner guide top is disposed with stopper two, for making blade be flared to maximum
Time limit guide rods continue up, and are provided with heaving pile hole for connecting mooring line on guide rod top, are equipped on anchor tail-hood plate
Lifting lug is for connecting installation wirerope；The upper end of anchor body is provided with application of the mounting hole for torque when installing.
In above-mentioned technical proposal, further, the described vane thickness control each section of anchor body radius three/
One.
Further, the maximum angle of the torsional spring controls between 70 ° to 80 °, controls the maximum open-angle of blade
Degree.
The installation method of the novel slurry filling Screw Anchor of expansible multilayer as described above is as follows:
During on-site construction, Screw Anchor is adjusted to designated mounting position using installation installation wirerope peculiar to vessel, guarantees anchor body
Verticality discharges anchor body, under the action of applying torque at mounting hole makes Screw Anchor by king bolt blade and minor spiral blade
Spiral injection sea bed to designated depth, tensioning mooring line moves upwards guide rod along central axis, and the first stopper drives at this time
Heaving pile annulus moves upwards, and wirerope is tightened upwards, and power is reached constraint annulus along pulley, restrained circle ring is made to move up to blade
Top releases the constraint to blade, opens blade under the elastic force effect of torsional spring, is flared to the maximum opening angle of torsional spring
Afterwards, jet groutinl is carried out by injected hole, slurries are cementing with seabed soil, are installed at this time.
The invention has the following advantages that
By opening the multiple layers of vanes of Screw Anchor side wall, the forced area of anchor body is improved, and then improve anchor body bearing capacity；
Apply torque, carry out underwater continuous helical injection using helical blade, penetration resistance is small, easy for installation without excavating；Every layer
Grouting Pipe built in blade, jet groutinl can form cementing, raising bearing capacity with seabed soil；
Detailed description of the invention
Fig. 1 is the structural schematic diagram of anchor body of the present invention before tensioning；
Fig. 2 is anchor body front sectional view of the present invention before tensioning；
Fig. 3 is anchor body top view of the present invention before tensioning；
Fig. 4 is anchor body bottom view of the present invention before tensioning；
Fig. 5 is anchor body main view sectional view of the present invention after tensioning；
Fig. 6 is anchor body bottom view of the present invention after tensioning；
Fig. 7 is blade slip casting schematic diagram.
In figure: 1, anchor body, 2, the big blade of spiral, 3, anchor head, 4, blade, 5, spiral vanelets, 6, guide rod, 7, Grouting Pipe,
8, torsional spring, 9, hinge, 10, constraint annulus, 11, wirerope, 12, wirerope hole, 13, pulley, 14, injected hole, 15, stopper one, 16, resistance
Block two, 17, heaving pile annulus, 18, mounting hole, 19, lifting lug, 20, heaving pile hole, 21, mooring line, 22, anchor tail-hood plate, 23, glue
Tie region, 24, slip casting branch pipe.
Specific embodiment
With a kind of specific example, technical scheme is described further explains below, but the solution of the present invention is simultaneously
It is non-to be only limitted to this.
Referring to Fig.1-7, a kind of novel slurry filling Screw Anchor of expansible multilayer sidewall, anchor body are divided into three layers, every layer of cloth
One piece of big blade of spiral is set, is arranged to four pieces of blades that can be rotated around pin-hinges under the big blade of spiral, in slip casting Screw Anchor spiral shell
Tensioning guide rod when revolving injection to specified depth of penetration opens the constraint of leaf abscission constraint annulus under the effect of torsion spring, increases
The forced area of slip casting Screw Anchor and seabed soil, then slip casting is carried out, slip casting can use MICP technology, improve the carrying energy of anchor
Power.Specifically, its structure is as follows: slip casting Screw Anchor anchor head 3 is cone, and anchor head arranges that spiral vanelets 5 are used for spiral injection,
Every layer of four pieces of blades 4 are uniformly hinged at 1 variable cross-section of anchor body by hinge 9, and blade 4 is tightened under the constraint of constraint annulus 10
When, guarantee that the area of section of anchor body 1 is constant, slip casting branch pipe 24 is set in every piece of blade 4, torsional spring is set between blade 4 and anchor body 1
8, the maximum opening angle of torsional spring 8 is set as 70 ° to 80 °, when tightening, constrains annulus 10 on the lower end of blade, every piece of blade 4
Side is correspondingly arranged wirerope hole 12 and pulley 13；6 upper end of guide rod stretches out anchor tail-hood plate 13 and stopper 1 is arranged, stopper 1
Diameter is greater than the internal diameter of anchor tail centre bore, moves downward for limiting guide rod 6, and heaving pile annulus 17 is arranged on stopper 1, leads
Bar corresponds to and is also provided with heaving pile annulus 17 at the second layer and third layer, and wirerope 11 will constrain annulus 10 by wirerope hole 12 and pulley 13
It is connect with heaving pile annulus 17, stopper 2 16 is arranged in 6 top of anchor body inner guide, and the radius of stopper 2 16 is greater than anchor tail centre bore
Internal diameter, when guide rod 6 moves up to stopper 2 15, heaving pile annulus 12 is moved upwards, and passing through wirerope 11 and pulley 13 will
Power reaches constraint annulus 10, and constraint annulus 10 moves to above blade 4, constraint of the releasing to blade 4, after constraint release, blade 4
The maximum open-angle of torsional spring 8 is flared under the action of torsional spring 8.On heaving pile annulus 17 be arranged injected hole 14, injected hole 14 with lead
The Grouting Pipe 7 being arranged in bar 6 connects, and Grouting Pipe 7 is connect with the slip casting branch pipe 24 in blade 4, and heaving pile hole is topmost arranged in guide rod 6
20, it is connected with mooring line 21, two lifting lugs 19 of symmetrical place's welding on the outside of anchor tail, for connecting installation wirerope, anchor tail goes out to set
Mounting hole 18 being set, applying torque when for installing.1 three parts of anchor body are respectively provided with the big blade 2 of a spiral and install for Screw Anchor
When spiral injection.
During on-site construction, wirerope and mooring line are installed in connection in advance, by installing installation wirerope peculiar to vessel for anchor body tune
To designated mounting position, guarantee the verticality of anchor body, discharge anchor body, applying torque at mounting hole makes anchor body spiral injection sea bed
Designated depth, tensioning mooring line 21 move upwards guide rod 6 along central axis, and the heaving pile annulus 17 on guide rod 6 is with guide rod at this time
6 move upwards, and when stopper 2 16 and anchor tail contact, heaving pile annulus 17 just drives every layer of constraint annulus 10 to move to blade
4 tops release the constraint to blade 4 completely, and blade 4 pops up under the action of torsional spring 8, are flared to the maximum angle of torsional spring 8, this
When jet groutinl carried out by injected hole 14 on heaving pile annulus 17, MICP technology can be used in slip casting, and slurries are infused to blade 4, made
Blade 4 and seabed soil are cementing, release installation wirerope, and installation terminates.
Installation procedure of the invention are as follows:
1. connection installation wirerope and mooring line in advance；
2. anchor body is lifted to predetermined position using installation ship；
3. guaranteeing the verticality of anchor body, loosen installation wirerope, discharges anchor body；
4. applying torque at mounting hole makes anchor body spiral injection sea bed designated depth；
5. tensioning mooring line pulls guide rod, guide rod drives constraint annulus to move to above blade, constraint relief annulus pair
The constraint of blade, opens blade；
Keep slurries cementing with seabed soil using MICP technology 6. carrying out underwater jet groutinl in injected hole；
7. completing installation.
Claims (6)
1. a kind of novel slurry filling Screw Anchor of expansible multilayer sidewall, which is characterized in that including anchor body (1), the big blade of spiral
(2), anchor head (3), spiral vanelets (5), guide rod (6), anchor tail-hood plate (13), heaving pile hole (20)；
Anchor body (1) is equally divided into several segments, and every segment structure is identical；In every section: anchor body (1) is variable section structure, and upper diameter is big
In lower part, be furnished with the big blade of spiral (2) on top, lower part is evenly distributed with several blades (4), at each blade upper end and variable cross-section by
(9) connection is cut with scissors, all blade (4) tightenings Shi Junyu anchor body (1) lower part is close to, and anchor body (1) lower part integral diameter and top one are made
It causes, torsional spring (8) is installed at hinge (9), slip casting branch pipe (24) are set in blade (4)；
Anchor head (3) is cone structure, is set to lowermost anchor body (1) lower end, one spiral vanelets (5) of cloth on anchor head；Anchor tail
Cover board (22) is set to uppermost anchor body (1) upper end, and guide rod (6) is vertically provided at anchor body (1) inner space, and upper end is pierced by anchor
Tail-hood plate (22) and stopper one (15) is equipped on guide rod (6) traversing through end, stopper one (15) is transported downwards for limiting guide rod
It is dynamic, heaving pile annulus (17) are set on stopper one (15), injected hole (14) are set on heaving pile annulus (17), injected hole (14) with lead
Grouting Pipe (7) connection being equipped with inside bar (6), Grouting Pipe (7) are connected to the slip casting branch pipe (24) in blade (4)；Every layer of blade
(4) it is tightened under the constraint of constraint annulus (10), wirerope hole (12) is set above every piece of blade (4), in the internal each steel of anchor body (1)
One corresponding pulley (13) is set above cable hole (12), and constraint annulus (10) passes through wirerope hole (12) and pulley by wirerope (11)
(13) it is connected with heaving pile annulus (17) corresponding on guide rod (6)；Guide rod (6) moves upwards, and wirerope (11) drives constraint annulus
(10) it moves to above blade (4), releases the constraint to blade (4), guide rod (6) top is disposed with stopper two (16), is used for
Make blade (4) be flared to maximum time limit guide rods (6) to continue up, is provided with heaving pile hole (15) on guide rod (6) top and is used for
It connects mooring line (16), lifting lug (17) is equipped on anchor tail-hood plate (3) for connecting installation wirerope；The upper end of anchor body (1) is set
It is equipped with the application of mounting hole (18) for torque when installing.
2. a kind of novel slurry filling Screw Anchor of expansible multilayer sidewall as described in claim 1, which is characterized in that the leaf
The slip casting branch pipe (24) of piece (4) is in vein shape.
3. a kind of novel slurry filling Screw Anchor of expansible multilayer sidewall as described in claim 1, which is characterized in that the leaf
One third of piece (4) thickness control in each section of anchor body (1) upper radius.
4. a kind of novel slurry filling Screw Anchor of expansible multilayer sidewall as described in claim 1, which is characterized in that the torsion
The maximum angle of spring (8) controls between 70 ° to 80 °, controls the maximum opening angle of blade (4).
5. a kind of installation method of the novel slurry filling Screw Anchor of expansible multilayer sidewall as described in claim 1, feature exist
In, the method is as follows: Screw Anchor is lifted by lifting lug (19) to designated mounting position by installation ship, Screw Anchor is discharged, is installing
Apply torque at hole (18), spiral injection is carried out under the action of spiral vanelets (5) and the big blade of spiral (2) to predetermined injection
Depth, tensioning mooring line pull guide rod (6) that constraint annulus (10) is driven to move to above blade (4), release to blade (4)
Constraint, blade (4) are opened, and carry out slip casting after fully opening, and slurries are cementing with seabed soil, complete installation.
6. a kind of installation method of the novel slurry filling Screw Anchor of expansible multilayer sidewall as claimed in claim 5, feature exist
MICP (Microbial induced calcite deposition) technology is used when, slip casting, injection slurry uses CASO
AGAR+ urea (20g/L) culture medium is cultivated to OD600=1.0 under conditions of 30 DEG C, pH are 7.3 and bacterium solution is made, and configuration is
Nutritive salt is made in 1:1 to the calcium acetate and urea liquid of 1mol/L by volume, and the 100mL bacterium solution made is mixed with 1L nutritive salt
Microbial inoculum is made, every 1L microbial inoculum handles 25cm3Part to be processed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238673.3A CN109969341B (en) | 2019-03-27 | 2019-03-27 | Grouting spiral anchor with expandable multilayer side wall and mounting method thereof |
| PCT/CN2019/103812 WO2020192015A1 (en) | 2019-03-27 | 2019-08-30 | Novel grouting screw anchor capable of opening multiple layers of side walls and mounting method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238673.3A CN109969341B (en) | 2019-03-27 | 2019-03-27 | Grouting spiral anchor with expandable multilayer side wall and mounting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109969341A true CN109969341A (en) | 2019-07-05 |
| CN109969341B CN109969341B (en) | 2020-08-04 |
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ID=67080958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910238673.3A Active CN109969341B (en) | 2019-03-27 | 2019-03-27 | Grouting spiral anchor with expandable multilayer side wall and mounting method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109969341B (en) |
| WO (1) | WO2020192015A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192015A1 (en) * | 2019-03-27 | 2020-10-01 | 浙江大学 | Novel grouting screw anchor capable of opening multiple layers of side walls and mounting method therefor |
| CN112664199A (en) * | 2021-01-05 | 2021-04-16 | 湘潭大学 | Protection mechanism for deep well excavation rock burst prevention based on safety engineering management |
| CN113774933A (en) * | 2021-09-28 | 2021-12-10 | 广西北投交通养护科技集团有限公司 | Improved lattice anchor rod composite slope reinforcing structure and construction method |
| CN113928477A (en) * | 2021-11-04 | 2022-01-14 | 福州大学 | Gravity injection type deepwater anchor and construction method |
| CN114134891A (en) * | 2022-01-29 | 2022-03-04 | 中国长江三峡集团有限公司 | Screw anchor assembly |
| CN114194332A (en) * | 2021-11-22 | 2022-03-18 | 浙江大学 | Power injection type umbrella-shaped mooring foundation |
| CN114454999A (en) * | 2022-01-29 | 2022-05-10 | 中国长江三峡集团有限公司 | Spiral type penetration plate anchor and construction method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591025B (en) * | 2020-12-16 | 2024-08-23 | 三沙供电局有限责任公司 | Ocean typhoon prevention system for wave power generation device |
| CN113859438A (en) * | 2021-11-04 | 2021-12-31 | 福州大学 | Deepwater grouting anchor and construction method |
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| CN107933828A (en) * | 2017-10-10 | 2018-04-20 | 浙江大学 | A kind of expandable Novel fish mine anchor of anchor head and its installation method |
| CN107933830A (en) * | 2017-10-10 | 2018-04-20 | 浙江大学 | The new type of deep-water anchor and its installation method of a kind of expansible multilayer anchor slab |
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| CN109969341B (en) * | 2019-03-27 | 2020-08-04 | 浙江大学 | Grouting spiral anchor with expandable multilayer side wall and mounting method thereof |
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- 2019-08-30 WO PCT/CN2019/103812 patent/WO2020192015A1/en active Application Filing
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| JPS6067290A (en) * | 1983-09-22 | 1985-04-17 | Satoru Kobayashi | Anchor |
| CN102587366A (en) * | 2012-03-13 | 2012-07-18 | 胜利油田胜利工程建设（集团）有限责任公司 | Self-drilling type spiral anchor rod and construction process using self-drilling type spiral anchor rod for grouting along with drilling, stirring and curing |
| CN206634159U (en) * | 2017-03-30 | 2017-11-14 | 羲和太阳能电力有限公司 | A kind of floating on water surface photovoltaic plant fixing device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192015A1 (en) * | 2019-03-27 | 2020-10-01 | 浙江大学 | Novel grouting screw anchor capable of opening multiple layers of side walls and mounting method therefor |
| CN112664199A (en) * | 2021-01-05 | 2021-04-16 | 湘潭大学 | Protection mechanism for deep well excavation rock burst prevention based on safety engineering management |
| CN113774933A (en) * | 2021-09-28 | 2021-12-10 | 广西北投交通养护科技集团有限公司 | Improved lattice anchor rod composite slope reinforcing structure and construction method |
| CN113928477A (en) * | 2021-11-04 | 2022-01-14 | 福州大学 | Gravity injection type deepwater anchor and construction method |
| CN114194332A (en) * | 2021-11-22 | 2022-03-18 | 浙江大学 | Power injection type umbrella-shaped mooring foundation |
| CN114194332B (en) * | 2021-11-22 | 2022-11-18 | 浙江大学 | Power injection type umbrella-shaped mooring foundation |
| CN114134891A (en) * | 2022-01-29 | 2022-03-04 | 中国长江三峡集团有限公司 | Screw anchor assembly |
| CN114454999A (en) * | 2022-01-29 | 2022-05-10 | 中国长江三峡集团有限公司 | Spiral type penetration plate anchor and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109969341B (en) | 2020-08-04 |
| WO2020192015A1 (en) | 2020-10-01 |
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