CN111412112A - Floating jacket spinning pile foundation structure and construction method thereof - Google Patents

Floating jacket spinning pile foundation structure and construction method thereof Download PDF

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Publication number
CN111412112A
CN111412112A CN202010220671.4A CN202010220671A CN111412112A CN 111412112 A CN111412112 A CN 111412112A CN 202010220671 A CN202010220671 A CN 202010220671A CN 111412112 A CN111412112 A CN 111412112A
Authority
CN
China
Prior art keywords
pile
jacket
rotary
skirt
sleeve
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.)
Pending
Application number
CN202010220671.4A
Other languages
Chinese (zh)
Inventor
丁红岩
王武斌
张浦阳
林毅峰
黄宣旭
张权
乐丛欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai East Ocean Engineering Technology Co.,Ltd.
Original Assignee
Shanghai East Ocean Engineering Technology Co ltd
Shanghai Investigation Design and Research Institute Co Ltd SIDRI
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai East Ocean Engineering Technology Co ltd, Shanghai Investigation Design and Research Institute Co Ltd SIDRI filed Critical Shanghai East Ocean Engineering Technology Co ltd
Priority to CN202010220671.4A priority Critical patent/CN111412112A/en
Publication of CN111412112A publication Critical patent/CN111412112A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/52Submerged foundations, i.e. submerged in open water
    • E02D27/525Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/56Screw piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/72Pile shoes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22Foundations specially adapted for wind motors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/727Offshore wind turbines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/728Onshore wind turbines

Abstract

The invention belongs to the technical field of foundation structures, and discloses a jacket spin pile foundation structure capable of floating and a construction method thereof, which comprises a jacket formed by connecting main legs and a support structure, wherein the outer side of the bottom of each main leg is welded with a skirt sleeve; the rotary pile comprises a central pile and rotary bearing blades, and the rotary bearing blades are arranged at the bottom of the central pile; the top of the driving rotary pile is connected with the skirt sleeve in a grouting way; the bottom of the skirt sleeve is provided with an anti-sinking structure; during construction, firstly, the top support of the rotary pile is fixed on the anti-sinking plate by utilizing buoyancy of the floating air bag, then the whole structure is transported to an installation place by utilizing the floating air bag, the whole structure is sunk to the mud surface of the anti-sinking plate, pile driving is carried out on the rotary pile by adopting pile driving equipment, and finally grouting is carried out to complete connection of the rotary pile and the jacket. The invention can achieve the purposes of saving materials, improving bearing capacity, reducing construction time and improving construction efficiency.

Description

Floating jacket spinning pile foundation structure and construction method thereof
Technical Field
The invention belongs to the technical field of foundation structures, and particularly relates to a jacket foundation and a construction method thereof.
Background
At present, in offshore wind power generation projects, fixed foundation structures generally have forms of pile foundations, gravity foundations, jacket foundations, barrel foundations and the like. With the development of offshore wind power towards deep and far sea, the excellent bearing performance and economy of the jacket foundation are highlighted in a deep water area. The offshore wind power jacket foundation structure mostly adopts a multi-pile foundation, and the load magnitude borne by the jacket foundation is continuously increased along with the increase of the application water depth of the jacket foundation, so that the pile length and the pile weight of the multi-pile foundation of the jacket are continuously increased. The difficulty and risk of offshore pile driving construction are greatly increased by the excessive pile length and pile weight. Therefore, how to optimize the form of the pile foundation, the bearing capacity of the pile foundation can be exerted to the maximum extent, and the construction difficulty is reduced, so that the key problem in the design of the jacket foundation is solved.
Disclosure of Invention
The invention aims to solve the technical problems of improving the bearing capacity of the offshore jacket pile foundation and reducing the construction difficulty, and provides a jacket spinning pile foundation structure capable of floating and a construction method thereof, which can achieve the purposes of saving materials, improving the bearing capacity, reducing the construction time and improving the construction efficiency.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a jacket spin pile foundation structure capable of floating comprises a jacket, wherein the jacket is formed by connecting main legs and a supporting structure, a skirt sleeve is welded on the outer side of the bottom of each main leg of the jacket, and a spin pile is connected through the skirt sleeve; the rotation driving pile comprises a central pile and rotation driving bearing blades, and the rotation driving bearing blades are arranged at the bottom of the central pile; the top of the central pile is inserted into the skirt sleeve and then connected with the skirt sleeve in a grouting manner; and an anti-sinking plate is arranged at the bottom of each skirt sleeve.
Furthermore, the driving and rotating piles can form a regular polygon on the horizontal plane according to the connecting line of the central points of the driving and rotating piles.
Further, the jacket is provided with a water injection hole.
Further, the inner diameter of the skirt pile sleeve is larger than the diameter of the center pile of the screwing pile and smaller than the outer diameter of the screwing bearing blade.
Further, the rotation bearing blades are inclined, are uniformly arranged around the axis of the central pile, are consistent in inclination direction, and have inclination angles of 30-150 degrees.
Further, the rotary bearing blades are spiral and are uniformly arranged around the axis of the central pile, the rotating direction of the rotary bearing blades is consistent, and the spiral angle of the rotary bearing blades ranges from 18 degrees to 360 degrees.
A construction method of the jacket spin pile foundation structure capable of floating transportation comprises the following steps:
(1) prefabricating a jacket, a pile driver, a skirt pile sleeve and an anti-sinking plate, and connecting the skirt pile sleeve with the jacket and the anti-sinking plate;
(2) inserting the screwing pile into the skirt sleeve from bottom to top, installing a floating air bag at the bottom of the screwing pile, and utilizing the buoyancy of the floating air bag to enable the screwing pile to be supported and fixed on the anti-sinking plate;
(3) transporting the integral structure obtained in the step (2) to an installation site by using the buoyancy of the floating air bag;
(4) after positioning, deflating the floating air bag, and injecting water into the jacket through a water injection hole to enable the integral structure to gradually sink until the anti-sinking plate contacts with a mud surface;
(5) piling the rotary pile by adopting piling equipment, wherein the rotary pile automatically rotates downwards to enter the soil under the interaction of the rotary bearing blades and the soil body in the piling process until the rotary pile reaches a design elevation;
(5) grouting is carried out in the skirt pile sleeve by utilizing grouting materials, and the connection of the rotary driving pile and the jacket is completed.
Further, after the step (3) is carried out and the sinking prevention plate is sunk to be in contact with a mud surface, the leveling of the jacket is realized by controlling the water injection amount of each main leg of the jacket.
The invention has the beneficial effects that:
according to the jacket pile foundation structure capable of floating transportation and the construction method thereof, the traditional single pile is replaced by the pile, universal pile driving equipment can be selected for pile driving construction of the pile, the pile can easily enter the ground under the interaction of the pile driving bearing blades and the soil body, and the effective load area of the central pile is far larger than the sectional area of the single pile with the same diameter after the pile is in place, so that the pile foundation structure has larger uplift bearing capacity; when the uplift bearing capacity is remarkably improved, the length and the diameter of the pile are greatly shortened compared with the traditional single pile, and a large amount of steel is saved. According to the invention, the driving rotary pile and the skirt pile sleeve are connected by grouting, so that the integrity of the driving rotary pile and the jacket is ensured, and the effective transmission of structural load is ensured; the anti-sinking plate is arranged at the bottom of the skirt pile sleeve, so that the preliminary leveling of the jacket is realized, the stability of the jacket during the piling construction is ensured, the contact area of the jacket and the seabed is increased, and the uneven settlement is reduced. The invention can adopt an integral wet-towing mode to carry out marine transportation, reduces the dependence on large hoisting and transporting ships and can greatly reduce the construction cost.
Drawings
Fig. 1 is a perspective view of a jacket spin-pile foundation structure according to an embodiment;
fig. 2 is a front view of a jacket spin-pile foundation structure according to an embodiment;
fig. 3 is a top view of a jacket spin-pile foundation structure according to an embodiment;
FIG. 4 is a schematic structural view of a pitch shaped swirl carrying vane;
FIG. 5 is a schematic structural view of a helical swirl bearing blade;
FIG. 6 is a state view of the transport construction of a jacket pile foundation structure according to an embodiment;
fig. 7 is a piling state diagram of a jacket pile foundation structure according to the embodiment.
In the above figures: 1. a jacket; 101. a main leg; 102. a support structure; 2. driving a rotary pile; 201. a central pile; 202. rotating the bearing blade; 3. a skirt sleeve; 4. an anti-sinking plate; 5. and (5) floating the air bag.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 3, the embodiment discloses a floating jacket spinning pile foundation structure, which is used for offshore wind power equipment and mainly comprises a jacket 1, spinning piles 2, a skirt sleeve 3 and an anti-sinking plate 4, wherein a plurality of identical spinning piles 2 can form a regular polygon on a horizontal plane according to a central point connecting line, the top of each spinning pile 2 is connected with the jacket 1 in a grouting manner, and the anti-sinking plate 4 is arranged at the bottom of the skirt sleeve 1.
The jacket 1 is formed by connecting a plurality of main legs 101 and a plurality of supporting structures 102, and the main legs 101 and the supporting structures 102 are made of round steel pipes. The diameter of the main leg 101 and the support structure 102 is in the range of 500-3000mm, and the wall thickness is in the range of 15-100 mm; the main leg 101 diameter is typically larger than the support structure 102 diameter. The number of main legs 11 is the same as the number of driven piles 2, typically 3-6. Usually, the main leg 101 is reserved with a water injection hole for injecting water into the jacket 11 manually during the sinking process to reduce the buoyancy of the jacket 1; the jacket 11 can also be leveled by controlling the amount of water injected in the different main legs 101.
The rotary pile 2 includes a central pile 201 and a rotary bearing blade 202, and the rotary bearing blade 202 is disposed at the bottom of the central pile 201. Generally, the central pile 201 of the driving and rotating pile 2 is a round steel pipe, the diameter of the pile is 1-10m, the mud entering length is 10-100m, and the thickness is 15-100 mm. The swirl bearing blades 202 are steel structures and may be angled or helical.
As shown in fig. 4, the inclined spin bearing blades 202 include a plurality of blades uniformly arranged around the axis of the central pile 201 and having the same inclination direction; the inclined rotary bearing blade 202 is simple in processing and blanking, high in processing speed and short in manufacturing period. Preferably, each inclined spin bearing blade 202 is a planar sheet structure, the inner side of the inclined spin bearing blade is welded to the surface of the central pile 201, and the outer side of the inclined spin bearing blade is parallel to the intersecting line of the inner side and the central pile 201, so as to ensure that the width of the spin bearing blade 202 is consistent along the way. Preferably, the number of the inclined swirling bearing blades 202 is 2-20, the inclination angle is 30-150 degrees, the width is 0.1-10 m, and the thickness is 1-200 mm. More preferably, the inclination angle of the inclined rotation bearing blade 202 is 45-135 degrees, and the inclination angle in the range can better form an interaction mode with the soil body, so that the rotation bearing blade 202 is more beneficial to shearing the soil body.
As shown in fig. 4, the helical rotation bearing blades 202 comprise at least one, which are uniformly arranged around the axis of the central pile 201 and have consistent rotation direction; the spiral screwing bearing blade 202 can effectively reduce the sinking resistance of the screwing pile 2 and reduce the hammering energy and times in the screwing process. Preferably, the number of the spiral whirl bearing blades 202 is 1-20, the spiral angle is 18-360 degrees, the width is 0.1-10 m, and the thickness is 1-200 mm. More preferably, the spiral angle of the spiral rotation bearing blade 202 is 45-135 degrees, and the inclination angle in the range can better form an interaction mode with the soil body, so that the rotation bearing blade 203 is more beneficial to shearing the soil body. The width of the rotation bearing blade 202 can be changed along the elevation according to the soil body strength of different soil layers and the stress of the central pile, the width of the weak part of the soil body is wider, and the width of the strong part of the soil body is narrower.
During construction, the rotary pile 2 can be driven by using general pile driving equipment, the rotary pile 2 automatically rotates downwards to enter the soil body under the interaction of the rotary bearing blades 202 and the soil body, and the rotary bearing blades 202 with large cross-sectional areas provide large bearing capacity for the rotary pile 2 after the rotary bearing blades 202 are in place.
Skirt pile sleeve 3 is circular steel pipe, and skirt pile sleeve 3's internal diameter is greater than the central stake 201 diameter of driving and revolve stake 2 and is less than the external diameter of driving and revolve bearing blade 202, guarantees to drive and revolve central stake 201 of stake 2 and can insert skirt pile sleeve 3 smoothly to the messenger beats and revolves bearing blade 202 card in the lower part of anti-sinking plate 4. The skirt pile sleeve 3 is arranged outside each main leg 101 of the jacket 1 and is connected to the bottom of the main leg 101 by welding. The top of the central pile 201 of the driven pile 2 is connected with the skirt pile casing 3 in a grouting way, so that the driven pile 2 and the jacket 1 are connected into a whole; the grouting material is common cement paste, epoxy cement paste or high-strength grouting material.
The anti-sinking plate 4 is a circular steel plate, the inner diameter of which is equal to the inner diameter of the skirt pile casing 3, and the thickness of which is 5-50 mm. The bottom of each skirt pile casing 3 is welded with an anti-sinking plate 4 to realize the primary leveling of the jacket 1, ensure the stability of the jacket 1 during the piling construction, increase the contact area of the jacket 1 and the seabed and reduce the uneven settlement.
The construction method of the jacket spin pile foundation structure capable of floating transportation specifically comprises the following steps:
(1) prefabrication of the jacket 1, the driven piles 2, the skirt pile sleeves 3 and the anti-settling structure 4 is completed on land, and connection of the skirt pile sleeves 3 with the main legs 101 of the jacket 1 and the anti-settling plates 4 is completed.
(2) As shown in fig. 6, the rotary piles 2 are inserted into the skirt sleeves 3 from the bottom up, and the air bags 5 are installed. The floating air bag 5 is a sphere or an ellipsoid, and the diameter of the floating air bag is slightly smaller than or equal to that of the anti-sinking plate 4; the floating air bag 5 is fixed at the bottom of the rotary pile 2 and is sleeved outside the rotary bearing blade 202; the floating air bag 5 is connected with a steel wire rope, and the steel wire rope is used for recovering the floating air bag 5 after the floating air bag 5 is deflated. Because the outer diameter of the screwing bearing blade 202 is larger than the inner diameter of the skirt pile casing 3, the screwing pile 2 can be firmly supported on the anti-sinking plate 4 by utilizing the buoyancy of the floating air bag 5 (the floating air bag 5 is positioned below the anti-sinking plate 4), so that the screwing pile 2 and the jacket 1 are tightly combined together.
(3) And (3) towing the integral structure obtained in the step (2) to an installation site by buoyancy of the buoyancy airbag 5, and realizing accurate positioning by using an anchoring system.
(4) After positioning, the floating air bag 5 is deflated, water is injected into the jacket 1 through a water injection hole, the integral structure gradually sinks until the rotation bearing blades 202 of the rotation pile 2 completely enter the mud surface and the anti-sinking plate 4 contacts the mud surface; the levelling of the jacket 1 is then achieved by controlling the amount of water injected into each main leg 101 of the jacket 1.
(5) As shown in fig. 7, the pile driving pile 2 is driven using a general pile driving hammer apparatus. The rotary pile 2 is inserted into the soil layer and rotates under the interaction of the rotary bearing blades 202 and the soil body, and the rotary bearing blades 202 are gradually rotated into the foundation by the torsion force; during initial piling, the steel rotary bearing blade 202 has a certain shearing effect on the foundation, during the piling process, the rotary bearing blade 202 rotates along with the hammering depth to generate a certain disturbance effect on the soil around the foundation of the central pile 201, so that the strength of the surrounding soil is weakened, and the rotary pile 2 is gradually rotated into the foundation by using the hammering effect of the piling hammer and the torsion of the rotary bearing blade 202 until the rotary pile 2 reaches the design elevation.
(6) The grouting material is utilized to perform underwater grouting in the skirt sleeve 3, the grouting material is common cement paste, epoxy cement paste or high-strength grouting material, so that the top of the central pile 201 is tightly connected with the skirt sleeve 3, the rotary driving pile 2 and the jacket 1 are integrated, and finally construction is completed.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.

Claims (8)

1. A jacket pile foundation structure capable of floating comprises a jacket and is characterized in that the jacket is formed by connecting main legs and a supporting structure, a skirt sleeve is welded on the outer side of the bottom of each main leg of the jacket, and the jacket pile foundation structure is connected with a pile through the skirt sleeve; the rotation driving pile comprises a central pile and rotation driving bearing blades, and the rotation driving bearing blades are arranged at the bottom of the central pile; the top of the central pile is inserted into the skirt sleeve and then connected with the skirt sleeve in a grouting manner; and an anti-sinking plate is arranged at the bottom of each skirt sleeve.
2. The buoyant jacket screw pile substructure of claim 1, wherein said screw piles are arranged in a regular polygon along a line connecting their center points on a horizontal plane.
3. The buoyant jacket screw pile substructure of claim 1, wherein said jacket is provided with water injection holes.
4. A buoyant jacket screw pile substructure according to claim 1, wherein the internal diameter of the skirt pile casing is larger than the central pile diameter of the screw pile and smaller than the external diameter of the screw-bearing blades.
5. The buoyant jacket spin pile substructure of claim 1, wherein the spin bearing blades are inclined, are uniformly arranged around the central pile axis and are inclined in a uniform direction, and have an angle of inclination of 30-150 °.
6. The buoyant jacket screw pile substructure of claim 1, wherein the screw bearing blades are helical, are uniformly arranged around the central pile axis and rotate in a uniform direction, and have a helix angle of 18-360 °.
7. A method of constructing a buoyant jacket screw pile substructure according to any of claims 1 to 6, comprising the steps of:
(1) prefabricating a jacket, a pile driver, a skirt pile sleeve and an anti-sinking plate, and connecting the skirt pile sleeve with the jacket and the anti-sinking plate;
(2) inserting the screwing pile into the skirt sleeve from bottom to top, installing a floating air bag at the bottom of the screwing pile, and utilizing the buoyancy of the floating air bag to enable the screwing pile to be supported and fixed on the anti-sinking plate;
(3) transporting the integral structure obtained in the step (2) to an installation site by using the buoyancy of the floating air bag;
(4) after positioning, deflating the floating air bag, and injecting water into the jacket through a water injection hole to enable the integral structure to gradually sink until the anti-sinking plate contacts with a mud surface;
(5) piling the rotary pile by adopting piling equipment, wherein the rotary pile automatically rotates downwards to enter the soil under the interaction of the rotary bearing blades and the soil body in the piling process until the rotary pile reaches a design elevation;
(5) grouting is carried out in the skirt pile sleeve by utilizing grouting materials, and the connection of the rotary driving pile and the jacket is completed.
8. The method for constructing a buoyant jacket spin-pile foundation structure according to claim 7, wherein the leveling of the jacket is performed by controlling the amount of water injected into each main leg of the jacket after sinking to the mud contact surface of the anti-sinking plate in step (3).
CN202010220671.4A 2020-03-25 2020-03-25 Floating jacket spinning pile foundation structure and construction method thereof Pending CN111412112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010220671.4A CN111412112A (en) 2020-03-25 2020-03-25 Floating jacket spinning pile foundation structure and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010220671.4A CN111412112A (en) 2020-03-25 2020-03-25 Floating jacket spinning pile foundation structure and construction method thereof

Publications (1)

Publication Number Publication Date
CN111412112A true CN111412112A (en) 2020-07-14

Family

ID=71489290

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010220671.4A Pending CN111412112A (en) 2020-03-25 2020-03-25 Floating jacket spinning pile foundation structure and construction method thereof

Country Status (1)

Country Link
CN (1) CN111412112A (en)

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Effective date of registration: 20210907

Address after: 300072 tiandaxinyuan village, Nankai District, Tianjin

Applicant after: Ding Hongyan

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Address before: 300072 tiandaxinyuan village, Nankai District, Tianjin

Applicant before: Ding Hongyan

Applicant before: SHANGHAI INVESTIGATION, DESIGN & RESEARCH INSTITUTE Co.,Ltd.

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Applicant before: Shanghai East Ocean Engineering Technology Co.,Ltd.