CN101708765B - Expanded type deep-sea suction anchor and installation method thereof - Google Patents
Expanded type deep-sea suction anchor and installation method thereof Download PDFInfo
- Publication number
- CN101708765B CN101708765B CN 200910225767 CN200910225767A CN101708765B CN 101708765 B CN101708765 B CN 101708765B CN 200910225767 CN200910225767 CN 200910225767 CN 200910225767 A CN200910225767 A CN 200910225767A CN 101708765 B CN101708765 B CN 101708765B
- Authority
- CN
- China
- Prior art keywords
- anchor
- diameter
- swelling
- tube
- core
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention belongs to a deep-sea floating platform mooring system, and in particular relates to an expanded type deep-sea suction anchor and an installation method thereof. The suction anchor comprises an anchor head and an anchor core which are connected with each other, wherein an anchor cylinder is arranged outside the anchor core; the wall of the anchor cylinder is provided with evenly distributed axial expanding joints; the inner side of the upper part of the anchor cylinder is provided with a division ring; the tail part of the anchor core is arranged on the division ring, and a first pressure chamber is formed by the tail part of the anchor core and one end part of the anchor cylinder; a second pressure chamber is formed between the outer wall of the anchor core and the inner wall of the anchor cylinder; a cylinder cover at the upper end of the anchor cylinder is provided with a first operation hole used in anchor expanding operation; and the side wall of the anchor cylinder under the division ring is provided with a second operation hole used in anchor inserting operation. The expanded type deep-sea suction anchor can increase the vertical bearing capacity and pulling resistance of a deep-sea anchor and reduce the difficulty in marine installation.
Description
Technical field
The invention belongs to deep-sea floating platform mooring system, be specifically related to a kind of expanded type deep-sea suction anchor and installation method thereof.
Background technology
The floating platform of deep-sea oil gas exploitation through the mooring system anchoring across the sea; Traditional catenary mooring system relies on the gravity of anchor chain self that the mooring force of floating platform is provided; Anchor chain is connected with anchor in the seabed, and the design of catenary mooring system must guarantee that the junction of anchor chain and anchor must not be pulled away from sea bed.Therefore, its anchor only provides the horizontal support effect, is referred to as towing anchor.Since the These characteristics of catenary mooring system, therefore, along with the increase of the depth of water; The anchor of mooring system and the distance of buoyancy aid are increasing, and for the distributed mode mooring system that floating platform adopts, its floor area is increasing; There is data to show; When the depth of water reaches 3000m, the distributed areas of catenary mooring system will equal to the area size of New York, the problem that this will cause adjacent floating flat-bed mooring system to interfere each other.Moreover, the increase of the depth of water also will increase the weight of anchor chain, cause the difficulty of construction transportation.
At present; The deep-sea floating platform has adopted the mooring system of a kind of later-model tensioning or half tension type, promptly substitutes anchor chain with the lighter nylon cable of weight, because the deficiency in weight of cable is to provide enough mooring forces; Therefore; Mooring fast is tensioning state, rather than the catenary shape, and mooring force comes from the tension force of cable.Because being the tension force by cable, mooring force provides, so the tension force of cable is horizontal gradeability no longer only just to the application force of anchor, also comprises vertical withdrawal force.The deep-sea anchor that mooring system adopted of tensioning or half tension type mainly contains three kinds of pile foundation type, negative pressure bucket formula and torpedo types.
The pile foundation type anchor is to rely on friction force that withdrawal resistance is provided, and therefore, is also referred to as friction pile.The deep-sea installation difficulty of pile foundation type anchor is big, mainly is that the piling technology problem at deep-sea is difficult to solve.Along with the increase of the depth of water, the length of anchoring pile increases, and in order to guarantee the rigidity of anchoring pile, must increase the diameter of anchoring pile, and along with the length of anchoring pile increases, the energy of pile monkey is dissipated by the pile body in the water in a large number, to such an extent as to pass less than pile crown, can't drive anchoring pile and advance.Therefore, when the depth of water surpassed 1000m, the pile foundation type anchor was inapplicable.
Negative pressure bucket formula anchor mainly relies on friction force, and suction also provides a part of withdrawal resistance.Negative pressure bucket formula anchor is the different of installation method with the difference of pile foundation type anchor, and it is the driving of leaning on monkey of pile driver kinetic energy that anchoring pile inserts the seabed, and the negative pressure that negative pressure bucket formula anchor then depends in the bucket is inserted the seabed with anchor.Its vertical bearing capacity comes from the friction of inner and outer barrel wall, and is therefore, very responsive to the teeter of bucket.Anchor is under the effect of anchor chain tension level component, and it is that inevitably this will weaken the vertical bearing capacity of anchor greatly that teeter takes place.
Torpedo type anchor and pile foundation type anchor are similar, and different is construction method, and its vertical bearing capacity is identical with the pile foundation type anchor, mainly are for solving the construction of deep-sea anchor.Because the Deep-sea pile driver difficulty is big, the pile foundation type anchor seldom uses in the mooring system of deep-sea oil development platform.
The anchor of existing tensioning or half tension type mooring system is except that the installation method difference, and its vertical bearing capacity all is that the friction force by the anchor body provides, and the existing method that improves vertical bearing capacity mainly is diameter or the length that increases anchor.And the diameter that increases anchor will increase the installation resistance, so present method is to rely on the length that increases anchor to improve vertical bearing capacity basically.
Summary of the invention
The objective of the invention is to provides a kind of expanded type deep-sea suction anchor and installation method thereof, thereby increases the vertical bearing capacity and the withdrawal resistance of deep-sea anchor, and reduce marine mounting hardness to the existing existing defective of deep-sea anchor.
Technical scheme of the present invention is following: a kind of expanded type deep-sea suction anchor, comprise interconnective anchor head and anchor core, and the anchor core is provided with the anchor tube outward; Wherein, The barrel of anchor tube is provided with the axial swelling seam of well-distributed, and the upper inner of anchor tube is provided with cuts apart ring, and the afterbody of anchor core places to be cut apart on the ring; And form first pressure chamber with the end of anchor tube, form second pressure chamber between the inwall of the outer wall of anchor core and anchor tube; The upper end cover of anchor tube is provided with the first operation hole of the swelling operation that is used for anchor, and the anchor tube sidewall of cutting apart the ring below is provided with the second operation hole of the insertion operation that is used for anchor.
Further, aforesaid expanded type deep-sea suction anchor, wherein, the end of described axial swelling seam is provided with the stop hole of diameter greater than swelling seam width.
Further; Aforesaid expanded type deep-sea suction anchor; Wherein, described anchor head is made up of nose cone, cylinder body, round platform tail and cylinder transition phase successively, and cone headed bottom surface diameter is identical with cylinder body diameter; Cylinder body diameter is identical with the top diameter of round platform tail, and the diameter at butt end of round platform tail is identical with cylinder transition phase diameter.
Further; Aforesaid expanded type deep-sea suction anchor; Wherein, described anchor core is made up of round platform swelling head, cylinder body and disk tail successively, and the diameter at butt end of round platform swelling head is identical with the cylinder transition phase diameter of anchor head; The top diameter of round platform swelling head is identical with cylinder body diameter, and the diameter of disk tail is identical with anchor tube internal diameter.
Further, aforesaid expanded type deep-sea suction anchor, wherein, described anchor tube external diameter is identical with anchor head cylinder transition phase diameter, and the upper end is sealed by cover; Axially the swelling seam is evenly distributed on the lower semisection of barrel.
Further, aforesaid expanded type deep-sea suction anchor, wherein, the barrel of anchor tube lower end inboard is the inclined-plane, the gradient on inclined-plane is identical with the gradient of the round platform swelling head of anchor core.
Further, aforesaid expanded type deep-sea suction anchor wherein, is provided with the suspension ring that are used to connect anchor chain on the cover of anchor tube.
A kind of installation method of expanded type deep-sea suction anchor comprises the steps:
(1) through the first operation hole first pressure chamber of anchor tube is carried out the water-filling pressurization;
(2) use the anchor technology of inserting commonly used that anchor is inserted the seabed;
(3) after the seam of the swelling on the anchor tube is all buried by soil, judge whether depth of penetration reaches desired depth,, do not reach desired depth execution in step (4) if reach desired depth then execution in step (5);
(4) draw water and air through the second operation hole, cause negative pressure in second pressure chamber, proceed the insertion operation of anchor, the depth of penetration that increases anchor is to reach desired depth;
(5) draw water and air through the first operation hole, cause negative pressure in first pressure chamber, make the anchor core, thereby swelling anchor tube is accomplished the installation of anchor with respect to anchor tube upward movement.
Beneficial effect of the present invention is following: expanded type deep-sea suction anchor provided by the present invention provides the vertical resistance of anchor through the expansion of anchor tube, thereby has increased the withdrawal resistance of anchor.Through the structure of two pressure chambers of design in the anchor tube, when carrying out the swelling operation of anchor, if the withdrawal resistance of anchor head is greater than the insertion resistance of anchor tube; Then swelling process will make the anchor tube continue to insert the seabed; And if the withdrawal resistance of anchor head is less than the insertion resistance of anchor tube, in the then swelling process, anchor head will promote; And the lifting of anchor head will make second pressure chamber produce negative pressure, thereby increase the withdrawal resistance of anchor.
Description of drawings
Fig. 1 is the external structure scheme drawing of expanded type deep-sea suction anchor;
Fig. 2 is the inner structure scheme drawing of expanded type deep-sea suction anchor;
Fig. 3 is the A-A schematic cross-section of Fig. 1;
Fig. 4 is the structural representation of anchor head;
Fig. 5 is the structural representation of anchor core;
Fig. 6 is the structural representation of anchor tube.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is carried out detailed description.
The overall plan of swelling type suction anchor is shown in Fig. 1～3, and Fig. 1 is the external structure of anchor, and Fig. 2 is the inner structure of anchor, and Fig. 3 is the cross-sectional structure of anchor.Anchor is made up of three parts: anchor head 1, anchor core 2 and anchor tube 3.The effect of anchor head 1 is to insert sea bed, and it is positioned at outside the anchor tube 3, and therefore, design objective is that the insertion resistance is little.The effect of anchor core 2 is swelling anchor tubes 3, and it is positioned at anchor tube 3.The effect of anchor tube 3 is to form pressure chamber and withdrawal resistance is provided; There are many on it along the axial swelling seam 4 of circumference well-distributed; The swelling seam has 6 in the present embodiment, and there is the circular hole 10 of a diameter greater than swelling seam width the end of every swelling seam 4, and its effect is a swelling seam end cracking when preventing swelling; Therefore, be also referred to as stop hole.The upper end cover of anchor tube 3 is provided with the first operation hole 8, is used for the swelling operation of anchor; Anchor tube sidewall is provided with the second operation hole 9, is used for the sinking operation of anchor.The cover of anchor tube 3 is provided with the suspension ring 11 that are used to connect anchor chain.
The concrete structure of anchor head is as shown in Figure 4, is made up of nose cone 12, cylinder body 13, round platform tail 14 and cylinder transition phase 15.The diameter of nose cone 12 is identical with cylinder body 13 diameters, and cylinder body 13 diameters are identical with the top diameter of round platform tail 14, and the diameter at butt end of round platform tail 14 is identical with cylinder transition phase 15 diameters.
The concrete structure of anchor core is as shown in Figure 5, is made up of round platform swelling 16, cylinder body 17 and disk tail 18.The diameter at butt end of round platform swelling 16 is identical with cylinder transition phase 15 diameters of anchor head, and the top diameter of round platform swelling 16 is identical with cylinder body 17 diameters, and the diameter of disk tail 18 is identical with anchor tube 3 internal diameters.
The concrete structure of anchor tube is as shown in Figure 6, and anchor tube 3 external diameters are identical with anchor head cylinder transition phase 15 diameters, and the upper end is sealed by cover, and cover is provided with the first operation hole 8, is provided with a pressure chamber in the tube and cuts apart ring 5, cuts apart the barrel that encircles 5 belows and is provided with the second operation hole 9.Anchor tube lower end edge circumference is uniform-distribution with six swellings seam 4, and swelling seam end is provided with stop hole 10, and the barrel of anchor tube 3 lower ends is inclined-plane 19, and the gradient of the round platform swelling of the gradient on inclined-plane 19 and anchor core 16 is identical.
As shown in Figure 2, anchor core 2 has formed two pressure chambers with anchor tube 3.The disk tail of anchor core 2 and anchor tube 3 ends form first pressure chamber 6, and the cylinder body of anchor core 2 and disk tail and the formed annular space of anchor tube are second pressure chamber 7.The effect of first pressure chamber 6 is through underbalance effect swelling anchor tube, and the effect of second pressure chamber 7 is the depth of penetration that increase anchor through underbalance effect.
The diameter of anchor tube and length are to confirm that according to the tension force of the character of seafloor soil and mooring fast for general non-soft basic sea bed, anchor tube diameter is about 2 meters, and then anchor tube length degree is not less than 10 meters.The anchor body controllable diameter of anchor head is built in about 1.5 meters; The tapering of anchor head round platform tail should be less than 1: 10 to reduce to insert resistance.The width of swelling seam is not less than 10 centimetres, and length is not less than 1/5 of anchor tube length degree.The diameter of stop hole is not less than 12 centimetres.The effect of swelling seam is not only a swelling anchor tube, and during insertion, seafloor soil will get into the anchor tube through the swelling seam and insert the pressure chamber of operation to form negative pressure.Because before stop hole was imbedded the seabed, second pressure chamber formed as yet, and if seafloor soil does not get into the anchor tube, even stop hole has been imbedded the seabed, the vacuumizing operation and can not make anchor further insert the seabed of second pressure chamber, and can only play the swelling effect.
The installation method of swelling type suction anchor provided by the present invention is following: at first with first pressure chamber, 6 water-fillings pressurizations, avoid when not reaching predetermined depth of penetration, owing to earth pressure makes the swelling of anchor tube.Then, anchor is inserted seabed (can adopt existing plug in anchor technology), when the depth of penetration of anchor is all buried the swelling seam by soil after; If depth of penetration does not reach desired depth when surpassing the second operation hole as yet (be that the anchor depth of penetration surpasses stop hole, but), can draw water and air through the second operation hole 9; Cause negative pressure in second pressure chamber 7; Because second pressure chamber 7 is to be formed by the seafloor soil (being got into by the crack arrest seam when anchor inserts) and the annular space of anchor tube, when the pressure in the pressure chamber during less than anchor tube external pressure, the anchor tube will sink; Proceed the insertion operation of anchor this moment, promptly utilizes the underbalance effect of second pressure chamber 7 to increase the depth of penetration of anchor.When 9 arrival seabeds, the second operation hole, draw water and air through the first operation hole 8, cause negative pressure in first pressure chamber 6; Along with the pressure of first pressure chamber less than the tube external pressure; The volume of first pressure chamber will reduce, thereby make the anchor core with respect to anchor tube upward movement (the anchor core gets into the anchor tube), thus the swelling of an anchor core indentation anchor tube; Make the swelling seam part of anchor tube open swelling anchor tube.Simultaneously, because the volume of second pressure chamber increases synchronously, the pressure of second pressure chamber is further reduced, therefore, the anchor of swelling process can further insert the seabed, has avoided the anchor head upward movement that depth of penetration is reduced.
Because the difference of seafloor soil character, anchor are during insertion, possibly once arrive desired depth (9 arrival seabeds, the second operation hole or imbed the seabed); At this moment; Do not need to carry out again the negative pressure operation of second pressure chamber 7, and directly carry out the swelling operation of first pressure chamber 6, accomplish the installation of anchor.
Product of the present invention and method are not limited to the embodiment described in the specific embodiment, and those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to technology innovation scope of the present invention equally.
Claims (8)
1. expanded type deep-sea suction anchor; Comprise interconnective anchor head (1) and anchor core (2), anchor core (2) is outer to be provided with anchor tube (3), and it is characterized in that: the barrel of anchor tube (3) is provided with the axial swelling seam of well-distributed (4); The upper inner of anchor tube (3) is provided with cuts apart ring (5); The afterbody of anchor core (2) places to be cut apart on the ring (5), and forms first pressure chamber (6) with the end of anchor tube (3), forms second pressure chamber (7) between the inwall of the outer wall of anchor core (2) and anchor tube (3); The upper end cover of anchor tube (3) is provided with the first operation hole (8) of the swelling operation that is used for anchor, and the anchor tube sidewall of cutting apart ring (5) below is provided with the second operation hole (9) of the insertion operation that is used for anchor.
2. expanded type deep-sea suction anchor as claimed in claim 1 is characterized in that: the end of described axial swelling seam (4) is provided with the stop hole (10) of diameter greater than swelling seam width.
3. according to claim 1 or claim 2 expanded type deep-sea suction anchor; It is characterized in that: described anchor head is made up of nose cone (12), cylinder body (13), round platform tail (14) and cylinder transition phase (15) successively; The bottom surface diameter of nose cone (12) is identical with cylinder body (13) diameter; Cylinder body (13) diameter is identical with the top diameter of round platform tail (14), and the diameter at butt end of round platform tail (14) is identical with cylinder transition phase (15) diameter.
4. expanded type deep-sea suction anchor as claimed in claim 3; It is characterized in that: described anchor core is made up of round platform swelling head (16), cylinder body (17) and disk tail (18) successively; The diameter at butt end of round platform swelling head (16) is identical with cylinder transition phase (15) diameter of anchor head; The top diameter of round platform swelling head (16) is identical with cylinder body (17) diameter, and the diameter of disk tail (18) is identical with anchor tube (3) internal diameter.
5. expanded type deep-sea suction anchor as claimed in claim 4 is characterized in that: described anchor tube (3) external diameter is identical with anchor head cylinder transition phase (15) diameter, and the upper end is sealed by cover; Axially swelling seam (4) is evenly distributed on the lower semisection of barrel.
6. expanded type deep-sea suction anchor as claimed in claim 5 is characterized in that: the barrel of anchor tube (3) lower end is inboard to be inclined-plane (19), and the gradient of inclined-plane (19) is identical with the gradient of the round platform swelling head (16) of anchor core.
7. according to claim 1 or claim 2 expanded type deep-sea suction anchor is characterized in that: on the cover of anchor tube (3), be provided with the suspension ring (11) that are used to connect anchor chain.
8. the installation method of an expanded type deep-sea suction anchor comprises the steps:
(1) through the first operation hole first pressure chamber of anchor tube is carried out the water-filling pressurization;
(2) anchor is inserted the seabed;
(3) after the seam of the swelling on the anchor tube is all buried by soil, judge whether depth of penetration reaches desired depth,, do not reach desired depth execution in step (4) if reach desired depth then execution in step (5);
(4) draw water and air through the second operation hole, cause negative pressure in second pressure chamber, proceed the insertion operation of anchor, the depth of penetration that increases anchor is to reach desired depth;
(5) draw water and air through the first operation hole, cause negative pressure in first pressure chamber, make the anchor core, thereby swelling anchor tube is accomplished the installation of anchor with respect to anchor tube upward movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910225767 CN101708765B (en) | 2009-12-03 | 2009-12-03 | Expanded type deep-sea suction anchor and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910225767 CN101708765B (en) | 2009-12-03 | 2009-12-03 | Expanded type deep-sea suction anchor and installation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101708765A CN101708765A (en) | 2010-05-19 |
| CN101708765B true CN101708765B (en) | 2012-12-26 |
Family
ID=42401577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910225767 Expired - Fee Related CN101708765B (en) | 2009-12-03 | 2009-12-03 | Expanded type deep-sea suction anchor and installation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101708765B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158837B (en) * | 2013-03-14 | 2018-07-17 | 中国石油大学(华东) | A kind of seabed mooring positioning device lifting drilling well for no marine riser seabed mud |
| CN107031792B (en) * | 2017-03-22 | 2019-05-07 | 湖北海洋工程装备研究院有限公司 | The installation method of the reinforcement device of suction anchor, suction anchor and reinforcement device |
| CN113022786B (en) * | 2021-04-26 | 2022-12-09 | 广西新港湾工程有限公司 | Method for arranging anchor cables of engineering ship at torrent river reach |
| CN114506415B (en) * | 2022-03-14 | 2023-09-01 | 中山大学 | Power tooth mechanism for correcting negative pressure cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036161A (en) * | 1973-07-04 | 1977-07-19 | The Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain & Northern Ireland | Underwater anchoring apparatus |
| WO1999057009A1 (en) * | 1998-05-06 | 1999-11-11 | Suction Pile Technology B.V. | Sea anchor and method for its deployment |
| CN2349127Y (en) * | 1998-09-21 | 1999-11-17 | 天津市海王星海上工程技术有限公司 | Double-cylinder type suction anchor |
| CN1440904A (en) * | 2002-02-26 | 2003-09-10 | 天津市海王星海上工程技术有限公司 | Self-installed suction anchor |
-
2009
- 2009-12-03 CN CN 200910225767 patent/CN101708765B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036161A (en) * | 1973-07-04 | 1977-07-19 | The Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain & Northern Ireland | Underwater anchoring apparatus |
| WO1999057009A1 (en) * | 1998-05-06 | 1999-11-11 | Suction Pile Technology B.V. | Sea anchor and method for its deployment |
| CN2349127Y (en) * | 1998-09-21 | 1999-11-17 | 天津市海王星海上工程技术有限公司 | Double-cylinder type suction anchor |
| CN1440904A (en) * | 2002-02-26 | 2003-09-10 | 天津市海王星海上工程技术有限公司 | Self-installed suction anchor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101708765A (en) | 2010-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2897267C (en) | Steel plate and concrete composite tank unit, tank group and offshore platforms | |
| KR101588820B1 (en) | Buoyance body and offshore floating structure using the same | |
| CN101708765B (en) | Expanded type deep-sea suction anchor and installation method thereof | |
| CN108316338B (en) | Suction injection type arc-shaped steel anchor | |
| JP2017521296A5 (en) | ||
| JP2017521296A (en) | Floating structure and installation method of floating structure | |
| CN108407987B (en) | Overwater stretched offshore wind power floating foundation and construction method thereof | |
| RU2011132406A (en) | MARINE BOATING BASE FOR PRODUCTION, STORAGE AND UNLOADING USED IN ICE AND PURE WATER | |
| CN103132521A (en) | Undersea suction anchor | |
| US20050241832A1 (en) | Integrated buoyancy joint | |
| JP2015510086A (en) | Offshore wind turbine | |
| CN105416511B (en) | Partly latent pitching pile formula offshore platform alignment system | |
| JP2020172872A5 (en) | ||
| CN105200970B (en) | Method for dismantling discarded jacket through air bags | |
| AU2011200337B2 (en) | Ballasted driven pile | |
| CN103031853B (en) | Seabed oil storage system | |
| CN110185409A (en) | A kind of separate type underwater well head suction anchor of highly-efficient processing transport | |
| CN211690420U (en) | Height-adjustable anchoring foundation structure based on bucket foundation | |
| CN113073644A (en) | Automatic drilling type seabed piling device and method | |
| CN108528638B (en) | Suction injection type arc-shaped combined anchor with wing plates | |
| CN116497818A (en) | Offshore large-diameter steel pipe pile anti-slip pile device and application method thereof | |
| NO337402B1 (en) | A floating hull with stabilizer section | |
| KR20130028312A (en) | Offshore structure having making part for lifting power and structure method thereof | |
| CN107135999B (en) | Gravity type anchoring foundation assembled by cement boards and construction method thereof | |
| CN211547794U (en) | Multi-cylinder jacket foundation connected by grouting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20131203 |