CN113863357A - Gravity center deviation single-column three-cylinder jacket foundation and construction method - Google Patents

Gravity center deviation single-column three-cylinder jacket foundation and construction method Download PDF

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Publication number
CN113863357A
CN113863357A CN202111077304.4A CN202111077304A CN113863357A CN 113863357 A CN113863357 A CN 113863357A CN 202111077304 A CN202111077304 A CN 202111077304A CN 113863357 A CN113863357 A CN 113863357A
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China
Prior art keywords
foundation
jacket
cylindrical
column
leg column
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CN202111077304.4A
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Chinese (zh)
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CN113863357B (en
Inventor
赵业彬
夏宏君
张晓斐
于平坤
吕俊盛
任宪骏
许卫东
高兴国
张玉海
腾丽霞
郭家沛
王昊
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Shandong Electric Power Engineering Consulting Institute Corp Ltd
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Shandong Electric Power Engineering Consulting Institute Corp Ltd
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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
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • 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
    • E02D27/44—Foundations for machines, engines or ordnance
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22—Foundations specially adapted for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Architecture (AREA)
  • Ocean & Marine Engineering (AREA)
  • Foundations (AREA)

Abstract

The invention provides a three-cylinder jacket foundation with a gravity center deviated to a single column and a construction method, wherein the jacket foundation comprises: a jacket structure, a transition section and a cylindrical foundation; the jacket structure is a frustum-shaped steel frame structure and comprises an upright post and inclined struts, the upright post comprises a main leg post, a first auxiliary leg post and a second auxiliary leg post, when the upright post structure is in an upright state, the main leg post is vertical to the horizontal plane, the first auxiliary leg post and the second auxiliary leg post are inclined and deviated to the side of the main leg post, and the three upright posts are connected and supported through the inclined struts; the lower part of the transition section is connected with the top of the jacket structure, and the upper part of the transition section is provided with a flange plate for fixing a fan tower cylinder; the cylindrical foundation comprises a first cylindrical foundation, a second cylindrical foundation and a third cylindrical foundation, the first cylindrical foundation is fixedly connected with the bottom end of the main leg column, and the second cylindrical foundation is fixedly connected with the bottom end of the first auxiliary leg column; the invention can effectively reduce the parking distance between the construction crane ship and the jacket foundation.

Description

Gravity center deviation single-column three-cylinder jacket foundation and construction method
Technical Field
The invention relates to the technical field of offshore wind power cylinder foundation type jacket foundations, in particular to a three-cylinder jacket foundation with a gravity center deviated to a single column and a construction method.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
With the updating and upgrading of offshore construction equipment, in recent years, offshore wind generating sets begin to be installed on a large scale by adopting a self-elevating platform ship, the self-elevating platform ship is provided with a hoisting crane and 4-8 pile legs, the pile legs are inserted into a seabed support and fix a barge after arriving at a site, the platform can be exposed out of the water and the height of the platform can be adjusted by a lifting system, a stable platform which is not influenced by waves is formed, and the hoisting crane finishes the hoisting of a fan on the platform.
After jacket foundation construction is accomplished or later stage carries out wind generating set's maintenance and trades piece, all need self-elevating platform ship to be close to the jacket basis and stay the position, when self-elevating platform ship's pile shoe extrusion income mud was to certain degree of depth, can arouse bulky soil body to remold and flow, if the pile shoe is close apart from the distance on jacket basis, then the motion of soil body can produce the side direction extrusion influence that is showing to the basis, consequently self-elevating platform ship need keep certain distance of staying with the jacket basis. And the longitudinal axis of the leg column of the guide pipe rack is at an angle with the longitudinal axis of the flange plate of the fan, so that the parking distance is further increased. Too big parking distance can increase the hoist and mount radius of hoist, reduces the biggest hoist and mount height of hoist, makes the unable full play of lifting capacity of hoist come out to improve the equipment use cost of construction.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the three-cylinder jacket foundation with the gravity center deviated to a single column and the construction method, so that the parking distance between the construction crane ship and the jacket foundation can be effectively reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a three-cylinder jacket foundation with a gravity center deviated to a single column in a first aspect.
A three-cylinder jacket foundation with a center of gravity biased toward a single column, comprising: a jacket structure, a transition section and a cylindrical foundation;
the jacket structure is a frustum-shaped steel frame structure and comprises stand columns and inclined struts, wherein each stand column comprises a main leg column, a first auxiliary leg column and a second auxiliary leg column, when the stand column structure is in an upright state, the main leg column is perpendicular to the horizontal plane, the first auxiliary leg column and the second auxiliary leg column are inclined and deviated to the side of the main leg column, the three stand columns are mutually connected and supported through the inclined struts, and the main leg column, the first auxiliary leg column, the second auxiliary leg column and the inclined struts are all hollow steel pipes;
the lower part of the transition section is connected with the top of the jacket structure, and the upper part of the transition section is provided with a flange plate for fixing a fan tower cylinder;
the barrel-shaped foundation comprises a first barrel-shaped foundation, a second barrel-shaped foundation and a third barrel-shaped foundation, the first barrel-shaped foundation is fixedly connected with the bottom end of the main leg column, the second barrel-shaped foundation is fixedly connected with the bottom end of the first auxiliary leg column, the third barrel-shaped foundation is fixedly connected with the bottom end of the second auxiliary leg column, and the inner space of the first barrel-shaped foundation is divided into a central cabin and a plurality of equal-size side cabins through an inner apron board and a plurality of cabin dividing boards.
Further, the second cylindrical foundation and the third cylindrical foundation are the same in shape and size, the diameter of the first cylindrical foundation is larger than that of the second cylindrical foundation and that of the third cylindrical foundation, and the skirt height of the second cylindrical foundation and that of the third cylindrical foundation are larger than that of the first cylindrical foundation.
Furthermore, the connecting line of the pipe axle line end points on the same side of the main leg column, the first auxiliary leg column and the second auxiliary leg column is in a regular triangle shape.
Further, the pipe diameter of the first auxiliary leg column is the same as that of the second auxiliary leg column, the pipe diameter of the main leg column is larger than that of the first auxiliary leg column and that of the second auxiliary leg column, and the pipe diameters of the first auxiliary leg column and the second auxiliary leg column are both larger than that of the inclined strut.
Further, the inner apron board is a cylindrical apron board which is arranged inside the first cylindrical foundation and is arranged around the central axis of the first cylindrical foundation, the inner side of the cylindrical apron board is a central cabin, a plurality of cabin dividing boards are uniformly arranged between the outer side of the cylindrical apron board and the inner wall of the first cylindrical foundation, and the space between every two adjacent cabin dividing boards is a side cabin.
The invention provides a construction method of the three-cylinder jacket foundation with the gravity center deviated to a single column, which comprises a floating method of the jacket foundation and comprises the following steps:
after the jacket foundation is prefabricated and assembled, the jacket foundation is inflated in each subdivision of the first cylindrical foundation, the first cylindrical foundation and the second cylindrical foundation in the shipping wharf port pool, so that the overall jacket foundation floats, and the jacket foundation is kept horizontal all the time by regulating and controlling the inflation rate in different subdivisions and cylinders in the upward floating process.
Furthermore, after the whole jacket foundation is hauled to a preset construction sea area, sinking and penetrating the jacket foundation, and firstly, executing a self-weight sinking stage;
after the crane ship is parked, the main hook hooks the lifting lugs on one side of the main leg column, and the auxiliary hooks hook the lifting lugs of the two auxiliary leg columns through the hoisting tool;
opening a drain pipe positioned at the top of the cylindrical foundation to enable the cylindrical foundation to be communicated with the inside and the outside so as to discharge the floating gas in the cylinder;
under the assistance of the hoisting of a hoisting ship, the jacket foundation is vertically and slowly sunk into the sea;
because the skirts of the second cylindrical foundation and the third cylindrical foundation are higher than those of the first cylindrical foundation, the second cylindrical foundation and the third cylindrical foundation can contact the mud surface before the first cylindrical foundation;
after the second cylindrical foundation and the third cylindrical foundation contact the mud surface, reducing the lifting force of the steel cable of the auxiliary hook of the crane ship so as to enable the whole jacket foundation to horizontally sink;
when the second cylindrical foundation and the third cylindrical foundation sink to a certain depth, the first cylindrical foundation starts to contact the mud surface and sinks into the mud by means of gravity.
Further, after the first cylindrical foundation, the second cylindrical foundation and the third cylindrical foundation are all automatically submerged into mud, the suction-assisted sinking stage is continuously executed, and the method comprises the following processes:
closing a drain pipe positioned at the top of the cylindrical foundation, opening a water pump on a top cover of the cylindrical foundation, and pumping water in the cylinder through the water pump to generate negative pressure in the cylinder so that the jacket foundation can continuously sink into the mud;
in the suction-assisted sinking stage, when the jacket foundation sinks and inclines, leveling the jacket foundation by adjusting negative pressure in different cylinders and sub-tanks;
the leveling principle is to reduce the pumping speed of the high-level cylinder and the sub-tank, increase the pumping speed of the low-level cylinder and the sub-tank until the jacket foundation is centered, stop leveling operation and then continue the suction-assisted sinking operation until the cylinder type foundation sinks to reach the designed elevation.
And further, after the jacket is installed and qualified through detection, the wind generating set is installed through a flange plate at the top of the transition section.
Furthermore, when the main construction ship is parked before the wind driven generator unit is installed, one side of the self-elevating platform ship close to the jacket foundation is vertical to the normal line of the longitudinal axis of the main leg column;
the main leg column perpendicular to the horizontal plane reduces the standing distance between the self-elevating platform ship and the jacket foundation on the basis of ensuring the safety distance, and further reduces the hoisting radius required by the crane on the self-elevating platform ship for hoisting the wind generating set.
Compared with the prior art, the invention has the beneficial effects that:
1. the three-cylinder jacket foundation with the gravity center deviated to the single column and the construction method can effectively reduce the parking distance between the construction crane ship and the jacket foundation.
2. According to the invention, by carrying out subdivision on the first cylindrical foundation, on one hand, the towing stability of the jacket foundation can be improved, and on the other hand, the leveling operation of the jacket foundation in the sinking installation stage is facilitated.
3. The jacket foundation is floated integrally by inflating the sub-cabins of the first cylindrical foundation, the second cylindrical foundation and the third cylindrical foundation, and the jacket foundation is kept horizontal all the time by regulating and controlling the inflation rates in the different sub-cabins and the cylinders in the floating process, so that the jacket foundation is floated quickly and stably.
4. According to the invention, the second cylindrical foundation and the third cylindrical foundation contact the mud surface before the first cylindrical foundation, and the lifting force of the auxiliary hook steel cable of the crane ship is reduced after the second cylindrical foundation and the third cylindrical foundation contact the mud surface, so that the horizontal sinking of the whole jacket foundation is ensured; in the process of suction-assisted sinking installation, when the jacket foundation sinks and inclines, the leveling of the jacket foundation is carried out by adjusting negative pressure in different cylinders and sub-tanks, so that the quick and stable leveling is realized.
5. According to the invention, when the main construction ship is parked before the wind driven generator unit is installed, one side of the self-elevating platform ship close to the jacket foundation is perpendicular to the normal of the longitudinal axis of the main leg column, and the main leg column vertical to the horizontal plane can reduce the parking distance between the self-elevating platform ship and the jacket foundation on the basis of ensuring the safety distance, so that the hoisting radius required by a crane on the self-elevating platform ship to hoist the wind driven generator unit is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a front view of a three-cylinder jacket foundation with a center of gravity biased toward a single column according to example 1 of the present invention.
Fig. 2 is a side view of a three-cylinder jacket foundation with a center of gravity biased toward a single column according to example 1 of the present invention.
Fig. 3 is a top view of a three-cylinder jacket foundation with a center of gravity biased toward a single column according to example 1 of the present invention.
Fig. 4 is a bottom view of a three-cylinder jacket foundation with a center of gravity biased toward a single column according to example 1 of the present invention.
Wherein: 1-jacket construction; 2-a transition section; 3-a cylinder foundation; 4-main leg column; 5-a first thigh leg; 6-a second secondary leg post; 7-diagonal bracing; 8-a flange plate; 9-a first cylindrical foundation; 10-a first cylindrical foundation type foundation; 11-a second small cylindrical foundation type foundation; 12-inner skirt board; 13-a first deck board; 14-a second deck board; 15-a third deck board; 16-a fourth deck board; 17-a central compartment; 18-a first sidecar; 19-a second sidecar; 20-a third side compartment; 21-fourth sidecar.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1:
as shown in fig. 1, embodiment 1 of the present invention provides a three-cylinder jacket foundation with a center of gravity biased toward a single column, which includes a jacket structure 1, a transition section 2, and a cylinder foundation 3.
Specifically, the jacket structure is a frustum-shaped steel frame structure and is formed by welding and combining a main leg column 4, a first auxiliary leg column 5, a second auxiliary leg column 6 and an inclined strut 7;
the main leg post 4, first pair of leg post 5, the vice leg post 6 of second, bracing 7 are hollow steel pipe, and first pair of leg post 5 is the same with the shape and the size of the vice leg post 6 of second, and 4 pipe diameters of main leg post are greater than 5 pipe diameters of first pair of leg post and the 6 pipe diameters of the vice leg post of second, and the pipe diameter of the vice leg post of first pair of leg post 5 and the vice leg post 6 of second is greater than 7 pipe diameters of bracing.
The main leg column 4, the first auxiliary leg column 5 and the second auxiliary leg column 6 are used as stand columns of a steel frame structure, and the connecting line of the axial endpoints of the pipes on the same side is in a regular triangle shape; when the upright column structure is in an upright state, the main leg column 4 is vertical to the horizontal plane, the other two auxiliary leg columns are inclined and deviated to the side of the main leg column 4, and the three upright columns are connected and supported through the inclined strut 7.
The transition section 2 is used as a member for bearing the upper part and the lower part, the lower part of the transition section is connected with the top of the jacket structure 1, and the upper part of the transition section is provided with a transition section flange 8 for installing a fan tower.
The cylindrical foundation 3 comprises a first cylindrical foundation 9, a second cylindrical foundation 10 and a third cylindrical foundation 11, the shape and the size of the second cylindrical foundation 10 are the same as those of the third cylindrical foundation 11, the diameter of the first cylindrical foundation 9 is larger than that of the second cylindrical foundation 10 and that of the third cylindrical foundation 11, and the diameter of the second cylindrical foundation 10 and that of the third cylindrical foundation 11 are larger than the skirt height of the first cylindrical foundation 9. The first cylindrical foundation 9 is fixed at the bottom end of the main leg column 4, the second cylindrical foundation 10 is fixed at the bottom end of the first auxiliary leg column 5, and the second cylindrical foundation 11 is fixed at the bottom end of the first auxiliary leg column 6.
In this embodiment, the inner skirt 12 is a cylindrical skirt disposed inside the first cylindrical foundation and around a central axis of the first cylindrical foundation, an inner side of the cylindrical skirt is a central cabin 17, a plurality of cabin dividing plates are uniformly disposed between an outer side of the cylindrical skirt and an inner wall of the first cylindrical foundation, and a space between adjacent cabin dividing plates is a cabin.
Specifically, the device comprises four bin dividing plates, namely a first bin dividing plate 13, a second bin dividing plate 14, a third bin dividing plate 15 and a fourth bin dividing plate 16 which are divided into four bins, namely a first side bin 18, a second side bin 19, a third side bin 20 and a fourth side bin 21.
It can be understood that in other embodiments, other numbers of the bin dividing plates may be provided, and further, the bin dividing plates may be divided into other numbers of side bins, and those skilled in the art may select the side bins according to specific working conditions, and details are not described here.
Example 2:
an embodiment 2 of the present invention provides a method for constructing a three-cylinder jacket foundation having a center of gravity biased toward a single column according to embodiment 1, including:
s1: the prefabricated assembly of the jacket foundation is completed in a steel structure processing field, the jacket foundation is transferred to a shipping wharf harbor pool after the assembly is completed, the whole jacket foundation floats through inflating five side cabins 18, 19, 20 and 21 of a first cylindrical foundation 9, a second cylindrical foundation 10 and a third cylindrical foundation 11, the jacket foundation always keeps horizontal through regulating and controlling the inflation speed in different sub cabins and barrels in the upward floating process, and after the floating preparation of the whole jacket foundation is completed, the jacket foundation is hauled to a construction sea area by a tugboat.
S2: the sinking installation of the jacket foundation is divided into two stages, namely a self-weight sinking stage and a suction-assisted sinking stage.
S2.1: the self-weight sinking stage comprises:
after the crane ship is parked, the main hook hooks the lifting lugs on one side of the main leg column 4, and the auxiliary hook hooks the two lifting lugs of the first auxiliary leg column 5 and the second auxiliary leg column 6 through the hoisting tool;
opening a drain pipe positioned at the top of the cylindrical foundation 3 to enable the cylindrical foundation 3 to be communicated with the inside and the outside so as to discharge the floating gas in the cylinder; under the assistance of the hoisting of a hoisting ship, the jacket foundation is vertically and slowly sunk into the sea;
because the skirt heights of the second cylindrical foundation 10 and the third cylindrical foundation 11 are greater than the skirt height of the first cylindrical foundation 9, the second cylindrical foundation 10 and the third cylindrical foundation 11 contact the mud surface before the first cylindrical foundation 9 contacts the mud surface;
after the second cylindrical foundation 10 and the third cylindrical foundation 11 contact the mud surface, the lifting force of the steel cable of the auxiliary hook of the crane ship is reduced so as to ensure that the whole jacket foundation sinks horizontally;
when the second cylindrical foundation 10 and the third cylindrical foundation 11 sink to a certain depth, the first cylindrical foundation 9 starts to contact the mud surface and sink through the mud by gravity.
S2.2: a suction assisted sink phase comprising:
after the three barrel-shaped foundations of the jacket foundation are immersed into the mud, closing a drain pipe positioned at the top of the barrel-shaped foundation 3, opening a water pump on a top cover of the barrel-shaped foundation 3, and pumping water in the barrel out through the water pump to generate negative pressure in the barrel so that the jacket foundation can be continuously immersed into the mud;
in the process of suction-assisted sinking installation in the second stage, when the jacket foundation sinks and inclines, leveling the jacket foundation by adjusting negative pressure in different cylinders and sub-cabins;
the principle of leveling is to reduce the pumping speed of the high-level cylinder and the sub-chamber and increase the pumping speed of the low-level cylinder and the sub-chamber until the jacket foundation is righted. And after the leveling operation is stopped, continuing the suction-assisted sinking operation until the cylindrical foundation sinks to the designed elevation.
S3: and after the jacket is installed and qualified in detection, a wind generating set is installed on a flange plate 8 reserved at the top of the transition section 2.
S4: when the main construction ship is located before the wind driven generator unit is installed, one side, close to the jacket foundation, of the self-elevating platform ship is perpendicular to a normal line of a longitudinal axis of the main leg column 4, the main leg column 4 perpendicular to the horizontal plane can reduce the location distance between the self-elevating platform ship and the jacket foundation on the basis of ensuring the safety distance, and then the hoisting radius required by a crane on the self-elevating platform ship to hoist the wind driven generator unit is reduced.
S5: thus, the next installation is performed according to the steps S1-S4.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a three cartridge type jacket foundations of focus deviation single-column which characterized in that:
the method comprises the following steps: a jacket structure, a transition section and a cylindrical foundation;
the jacket structure is a frustum-shaped steel frame structure and comprises stand columns and inclined struts, wherein each stand column comprises a main leg column, a first auxiliary leg column and a second auxiliary leg column, when the stand column structure is in an upright state, the main leg column is perpendicular to the horizontal plane, the first auxiliary leg column and the second auxiliary leg column are inclined and deviated to the side of the main leg column, the three stand columns are mutually connected and supported through the inclined struts, and the main leg column, the first auxiliary leg column, the second auxiliary leg column and the inclined struts are all hollow steel pipes;
the lower part of the transition section is connected with the top of the jacket structure, and the upper part of the transition section is provided with a flange plate for fixing a fan tower cylinder;
the barrel-shaped foundation comprises a first barrel-shaped foundation, a second barrel-shaped foundation and a third barrel-shaped foundation, the first barrel-shaped foundation is fixedly connected with the bottom end of the main leg column, the second barrel-shaped foundation is fixedly connected with the bottom end of the first auxiliary leg column, the third barrel-shaped foundation is fixedly connected with the bottom end of the second auxiliary leg column, and the inner space of the first barrel-shaped foundation is divided into a central cabin and a plurality of equal-size side cabins through an inner apron board and a plurality of cabin dividing boards.
2. The three-cylinder jacket foundation having a center of gravity biased toward a single column as claimed in claim 1, wherein:
the diameter of the first cylindrical foundation is larger than the diameters of the second cylindrical foundation and the third cylindrical foundation, and the skirt heights of the second cylindrical foundation and the third cylindrical foundation are larger than the skirt height of the first cylindrical foundation.
3. The three-cylinder jacket foundation having a center of gravity biased toward a single column as claimed in claim 1, wherein:
the connecting lines of the pipe axis line ends on the same side of the main leg column, the first auxiliary leg column and the second auxiliary leg column are in a regular triangle shape.
4. The three-cylinder jacket foundation having a center of gravity biased toward a single column as claimed in claim 1, wherein:
the main leg column pipe diameter is greater than first pair leg column pipe diameter and the vice leg column pipe diameter of second, and first pair leg column pipe diameter and the vice leg column pipe diameter of second all are greater than the bracing pipe diameter.
5. The three-cylinder jacket foundation having a center of gravity biased toward a single column as claimed in claim 1, wherein:
the inner apron board is a cylindrical apron board which is arranged inside the first cylindrical foundation and arranged around the central axis of the first cylindrical foundation, the inner side of the cylindrical apron board is a central cabin, a plurality of cabin dividing boards are uniformly arranged between the outer side of the cylindrical apron board and the inner wall of the first cylindrical foundation, and the space between every two adjacent cabin dividing boards is a side cabin.
6. A method of constructing a three-cylinder jacket foundation having a center of gravity biased toward a single column according to any one of claims 1 to 5, comprising:
the floating method of the jacket foundation comprises the following steps:
after the jacket foundation is prefabricated and assembled, the jacket foundation is inflated in each subdivision of the first cylindrical foundation, the first cylindrical foundation and the second cylindrical foundation in the shipping wharf port pool, so that the overall jacket foundation floats, and the jacket foundation is kept horizontal all the time by regulating and controlling the inflation rate in different subdivisions and cylinders in the upward floating process.
7. The construction method according to claim 6, wherein:
after the whole jacket foundation is hauled to a preset construction sea area, sinking and penetrating the jacket foundation, and firstly, executing a self-weight sinking stage;
after the crane ship is parked, the main hook hooks the lifting lugs on one side of the main leg column, and the auxiliary hooks hook the lifting lugs of the two auxiliary leg columns through the hoisting tool;
opening a drain pipe positioned at the top of the cylindrical foundation to enable the cylindrical foundation to be communicated with the inside and the outside so as to discharge the floating gas in the cylinder;
under the assistance of the hoisting of a hoisting ship, the jacket foundation is vertically and slowly sunk into the sea;
because the skirts of the second cylindrical foundation and the third cylindrical foundation are higher than those of the first cylindrical foundation, the second cylindrical foundation and the third cylindrical foundation can contact the mud surface before the first cylindrical foundation;
after the second cylindrical foundation and the third cylindrical foundation contact the mud surface, reducing the lifting force of the steel cable of the auxiliary hook of the crane ship so as to enable the whole jacket foundation to horizontally sink;
when the second cylindrical foundation and the third cylindrical foundation sink to a certain depth, the first cylindrical foundation starts to contact the mud surface and sinks into the mud by means of gravity.
8. The construction method according to claim 7, wherein:
after the first cylindrical foundation, the second cylindrical foundation and the third cylindrical foundation are all automatically submerged into mud, the suction auxiliary sinking stage is continuously executed, and the method comprises the following processes:
closing a drain pipe positioned at the top of the cylindrical foundation, opening a water pump on a top cover of the cylindrical foundation, and pumping water in the cylinder through the water pump to generate negative pressure in the cylinder so that the jacket foundation can continuously sink into the mud;
in the suction-assisted sinking stage, when the jacket foundation sinks and inclines, leveling the jacket foundation by adjusting negative pressure in different cylinders and sub-tanks;
the leveling principle is to reduce the pumping speed of the high-level cylinder and the sub-tank, increase the pumping speed of the low-level cylinder and the sub-tank until the jacket foundation is centered, stop leveling operation and then continue the suction-assisted sinking operation until the cylinder type foundation sinks to reach the designed elevation.
9. The construction method according to claim 8, wherein:
and after the jacket is installed and the detection is qualified, installing a wind generating set through a flange plate at the top of the transition section.
10. The construction method according to claim 6, wherein:
when the main construction ship is parked before the wind driven generator unit is installed, one side of the self-elevating platform ship close to the jacket foundation is vertical to the normal line of the longitudinal axis of the main leg column;
the main leg column perpendicular to the horizontal plane reduces the standing distance between the self-elevating platform ship and the jacket foundation on the basis of ensuring the safety distance, and further reduces the hoisting radius required by the crane on the self-elevating platform ship for hoisting the wind generating set.
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