CN110424442B - Elastic transition section cylindrical foundation structure and construction method thereof - Google Patents
Elastic transition section cylindrical foundation structure and construction method thereof Download PDFInfo
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- CN110424442B CN110424442B CN201910573449.XA CN201910573449A CN110424442B CN 110424442 B CN110424442 B CN 110424442B CN 201910573449 A CN201910573449 A CN 201910573449A CN 110424442 B CN110424442 B CN 110424442B
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- 230000007704 transition Effects 0.000 title claims abstract description 75
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 130
- 239000010959 steel Substances 0.000 claims abstract description 130
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 238000009417 prefabrication Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—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
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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
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- 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
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- 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
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- 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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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The invention belongs to the technical field of foundation structures of ocean engineering, and discloses an elastic transition section cylinder type foundation structure and a construction method thereof, wherein the foundation structure comprises a steel cylinder structure with a cabin division structure, the top of the steel cylinder structure is connected with a steel top plate, concrete plates are arranged on the steel top plate, a beam plate system is distributed on the concrete plates, a concrete transition section is located on a middle ring beam, a steel tower cylinder is embedded and connected at the upper part of the concrete transition section, and the connection parts of the upper part and the lower part of the steel tower cylinder are contacted with the concrete transition section and an inner ring beam through elastic buffer devices; the construction method comprises the steps of land prefabrication, shore hoisting, water towing, negative pressure sinking, negative pressure reinforcement and the like. The invention has the advantages of a cylindrical foundation, wide application range, convenient transportation and installation, recycling and high bearing capacity, and the upper load can be transmitted to the transition section and the beam plate system through the elastic buffer devices of the upper part and the lower part in the construction period and the operation period.
Description
Technical Field
The invention relates to the technical field of foundation structures of ocean engineering, in particular to a cylindrical foundation structure and a construction method thereof.
Background
The transition section of the offshore wind power cylinder type foundation is used as a force transmission structure, so that the bearing capacity of the foundation is exerted to the greatest extent as to whether the foundation structure can convert upper load into controllable stress and transmit the controllable stress into the foundation. As the depth of water increases, the environmental load experienced by the foundation and the load transferred by the upper fans increase, thus requiring a larger transition section structure. It is necessary to provide a transition section structure with more effective load transfer and higher safety.
Disclosure of Invention
The invention aims to solve the technical problems of unreasonable load transmission and complex construction and installation of the existing offshore cylindrical foundation structure, and provides an elastic transition section cylindrical foundation structure and a construction method thereof, which skillfully and effectively transmit loads of an upper structure in a construction period and an operation period to a linear transition section and a concrete top plate and further transmit the loads to a lower cylindrical foundation.
In order to solve the technical problems, the invention is realized by the following technical scheme:
The elastic transition section cylindrical foundation structure comprises a steel cylinder structure with a cabin dividing structure, and is characterized in that the top of the steel cylinder structure is connected with a steel top plate, a concrete plate is arranged on the upper portion of the steel top plate, a concrete transition section is arranged on the upper portion of the concrete plate, the concrete transition section is of a linear thin-wall structure with a circular ring section, and the diameter of a bottom circular ring is larger than that of a top circular ring; the upper part of the concrete transition section is provided with a section of steel tower barrel, and the lower part of the steel tower barrel passes through the concrete transition section and contacts with the concrete slab;
the top surface of the concrete slab is provided with an outer ring beam, a middle ring beam, a first inner ring beam and a second inner ring beam; the outer ring beam is positioned at the outer side edge of the top surface of the concrete slab; the middle ring beam is positioned in the middle of the top surface of the concrete slab and is arranged at the lower part of the concrete transition section; the first inner ring beam is arranged on the inner side of the steel tower barrel, and the second inner ring beam is arranged on the outer side of the steel tower barrel; the bottom end of the steel tower cylinder is inserted between the second inner ring beam and the first inner ring beam;
Concrete main beams are radially and uniformly arranged on the top surface of the concrete slab, and extend from the second inner ring beam to the outer ring beam; concrete secondary beams are radially and uniformly arranged between every two adjacent concrete main beams on the top surface of the concrete slab, and extend from the middle ring beam to the outer ring beam;
the steel tower cylinder is contacted with the top of the concrete transition section through an elastic buffer device, and the bottom of the steel tower cylinder is contacted with the first inner ring beam, and the bottom of the steel tower cylinder is contacted with the second inner ring beam through the elastic buffer device.
Further, the radius of the steel cylinder structure is 10-25m, the height is 5-15m, and the thickness of the cylinder wall is 10-50mm.
Further, the steel cylinder structure is divided into a plurality of cabins through a dividing plate, and the cabins comprise a middle cabin and a plurality of side cabins which are surrounded on the periphery of the middle cabin; the cylinder wall of the steel cylinder structure is connected with the dividing plate through welding, and the dividing plate is connected with the dividing plate through welding.
Further, the steel roof plate is provided with upward steel rib plates at the periphery, and the steel rib plates are inserted into the concrete slab and the outer ring beam.
Further, the steel cylinder structure is consistent with the contours of the concrete plate and the steel top plate, and the thickness of the concrete plate is 0.3-1m.
Further, the concrete transition section is of an equal-thickness structure, the wall thickness of the concrete transition section is 0.5-1.5m, and prestressed steel strands are distributed in the middle of the concrete transition section.
Further, the outer edge of the outer ring beam is flush with the outer edge of the concrete slab and is consistent in shape with the edge of the concrete slab; the width of the outer ring beam is 0.5-1.5m, and the height is 0.8-1.8m; the middle ring beam is positioned in the middle of the top surface of the concrete slab, is ring-shaped, has the width of 0.5-1.5m and the height of 0.8-1.8m; the radius of the middle ring beam is 1.5-2.5 times of the radius of the steel tower barrel; the outer diameter of the first inner ring beam is smaller than the inner diameter of the steel tower barrel by 0.2m-1m, the width is 0.5-2.5m, and the height is 0.8-1.8m; the inner diameter of the second inner ring beam is 0.2m-1m larger than the outer diameter of the steel tower, the width is 0.5-2.5m, and the height is 0.8-1.8m.
Further, the width of the concrete girder is 0.5-1.5m, and the height is 0.8-1.8m; the included angle between the adjacent concrete main beams is 60 degrees; the concrete secondary beams comprise 12-18 concrete secondary beams, 2-3 concrete secondary beams are arranged between every two adjacent concrete main beams, and the included angle between the axes of the adjacent concrete secondary beams is 20-30 degrees.
Further, the elastic buffer device is composed of a waterproof layer a, an antioxidant layer b, an elastic metal coil c, a first rubber layer d, a rubber protruding layer e and a second rubber layer f in sequence, wherein the thickness is 0.2-1m, and the height is 0.8-1.8m.
The construction method of the elastic transition section cylindrical foundation structure comprises the following steps:
(1) After a steel cylinder structure with a cabin dividing structure is prefabricated on land, welding the steel cylinder structure with the steel top plate;
(2) Binding steel bars on the steel top plate serving as a bottom surface template of the concrete plate, and performing pouring construction on the concrete plate, the outer ring beam, the middle ring beam, the first inner ring beam, the second inner ring beam, the concrete main beam, the concrete secondary beam and the concrete transition section together;
(3) Hanging the integral structure with the casting construction into water, checking air tightness, installing the steel tower barrel on the concrete slab, installing an elastic buffer device between the bottom of the steel tower barrel and the first inner ring beam, between the bottom of the steel tower barrel and the second inner ring beam and between the steel tower barrel and the top of the concrete transition section, installing a machine head on the steel tower barrel, and adjusting the draft of the steel barrel structure according to towing requirements;
(4) Floating and towing the elastic transition section cylindrical foundation structure and the machine head;
(5) After the elastic transition section cylindrical foundation structure and the machine head float and tow to a designated sea area, the self weight of the elastic transition section cylindrical foundation structure and the machine head sink to a designated position under negative pressure;
(6) And after sinking, reinforcing the soil body in the steel cylinder structure.
The beneficial effects of the invention are as follows:
the elastic transition section cylinder type foundation structure of the invention connects the steel cylinder structure with the sub-cabin structure, the steel top plate and the concrete slab into a whole, which is beneficial to increasing the anti-overturning moment of the steel cylinder structure and improving the stability in the transportation process; the steel cylinder structure is directly connected with the concrete slab and combined with the slab beam system, so that the upper load is effectively transferred and uniformly dispersed, and the upper load is approximately converted into tension and pressure at the position of the cylinder foundation, so that the maximum bearing capacity of the cylinder foundation is exerted, and the structural stress system is clear; the concrete transition section adopts a cast-in-situ process, is of an integral structure, and transmits upper load together, so that the integral rigidity of the structure is improved, materials are saved, and the manufacturing cost is reduced.
The elastic buffer devices are arranged between the steel tower barrel and the concrete transition section and between the steel tower barrel and the two inner ring beams, so that part of load can be dissipated while the upper bending moment load is effectively transferred, and hard contact crushing of concrete between the steel tower barrel and the concrete structure is prevented.
The elastic transition section cylindrical foundation structure can realize the technology of land prefabrication, floating, towing, sinking and leveling in construction, has reliable pouring quality and no impact load such as piling, avoids using large-scale machines such as hoisting equipment and the like at sea in the construction process, reduces the working procedures of construction, reduces the difficulty of offshore operation and the risk of damage to a fan caused by rapid severe change of the marine environment, has simple required equipment, is safe and effective, takes only several hours for offshore installation time, and has short construction period, high efficiency, good quality and high safety compared with the traditional foundation structure, and greatly reduces the installation cost of offshore wind power construction and wind turbine.
Drawings
FIG. 1 is a schematic perspective view of a barrel-type foundation structure of an elastic transition section provided by the invention;
FIG. 2 is a front view of a resilient transition piece cartridge base structure provided by the present invention;
FIG. 3 is a top view of a resilient transition piece cartridge base structure provided by the present invention;
FIG. 4 is a schematic illustration of the structure of the resilient transition piece cartridge base structure of the present invention with the transition piece portion removed;
fig. 5 is a cross-sectional view of an elastic buffer structure in an elastic transition piece barrel-type base structure provided by the invention.
In the figure: 1. a steel cylinder structure; 2. a concrete slab; 3. a concrete transition section; 4. a steel tower; 5. an elastic buffer device; 6. an outer ring beam; 7. a middle ring beam; 8. a second inner ring beam; 9. a concrete girder; 10. and (5) a concrete secondary beam.
Detailed Description
For further understanding of the invention, the following examples are set forth to illustrate, together with the drawings, the detailed description of which follows:
As shown in fig. 1 to 3, the present embodiment discloses an elastic transition section cylindrical foundation structure, which comprises a steel cylindrical structure 1 with a cabin division structure, a concrete slab 2, a concrete transition section 3, a steel tower 4, an outer ring beam 6, a middle ring beam 7, a first inner ring beam, a second inner ring beam 8, a concrete main beam 9 and a concrete secondary beam 10.
The radius of the steel cylinder structure 1 is 10-25m, the height is 5-15m, and the thickness of the cylinder wall is 10-50mm. The steel cylinder structure 1 is divided into a plurality of cabins by a dividing plate, and the cabins comprise a middle cabin and a plurality of side cabins which are enclosed on the periphery of the middle cabin. The cylinder wall of the steel cylinder structure 1 and the dividing plate as well as the dividing plate and the dividing plate are connected with each other through welding.
The steel roof sets up in steel cylinder structure 1 top, welds with steel cylinder structure 1's top. The steel top plate 2 is circular in shape and 0.006-0.01m thick. The circumference of the steel top plate is provided with an upward steel rib plate, and the height of the steel rib plate is the same as the total height of the concrete slab 2 and the outer ring beam 6; the steel rib plate is used for being inserted into the concrete slab 2 and the outer ring beam 6 to realize the effective connection of the concrete structure and the steel cylinder structure 1.
The upper part of the steel roof plate is provided with a concrete plate 2, the concrete plate 2 is consistent with the outline of the steel roof plate, and the thickness of the concrete plate 2 is 0.3-1m. The concrete slab 2 is poured on the upper part of the steel roof, and the steel rib plate of the steel roof penetrates into the concrete slab 2 upwards, so that the concrete slab 2 and the steel roof are firmly combined.
As shown in fig. 4, the top surface of the concrete slab 2 is provided with four ring beams, including an outer ring beam 6, a middle ring beam 7, a first inner ring beam and a second inner ring beam 8. The outer ring beam 6 is positioned outside the top surface of the concrete slab 2, the outer edge of the outer ring beam is flush with the outer edge of the concrete slab 2, and the shape of the outer ring beam is consistent with the edge of the concrete slab 2; the width of the outer ring beam 6 is 0.5-1.5m, and the height is 0.8-1.8m. The middle ring beam 7 is positioned in the middle of the top surface of the concrete slab 2, is ring-shaped, has the width of 0.5-1.5m and the height of 0.8-1.8m; the radius of the middle ring beam 7 is 1.5-2.5 times of the radius of the steel tower 4. The second inner ring beam 8 is arranged outside the first inner ring beam, the outer diameter of the first inner ring beam is 0.2m-1m smaller than the inner diameter of the steel tower 4, the width is 0.5-2.5m, and the height is 0.8-1.8m. The inner diameter of the second inner ring beam 8 is 0.2m-1m larger than the outer diameter of the steel tower 4, the width is 0.5-2.5m, and the height is 0.8-1.8m.
The top surface of the concrete slab 2 is connected with a concrete main beam 9 and a concrete secondary beam 10 between the ring beams. The concrete main beams 9 are radially and uniformly arranged on the top surface of the concrete slab 2, and extend from the second inner ring beam 8 to the outer ring beam 6. In one embodiment of the invention, the concrete main beams 9 comprise 6, and the included angle between the adjacent concrete main beams 9 is 60 degrees; the width of the concrete girder 9 is 0.5-1.5m, and the height is 0.8-1.8m. The concrete secondary beams 10 are radially and evenly arranged between every two adjacent concrete main beams 9 on the top surface of the concrete slab 2, and extend from the middle ring beam 7 to the outer ring beam 6. In one embodiment of the invention, the concrete secondary beams 10 comprise 12-18, 2-3 concrete secondary beams 10 are arranged between every two adjacent concrete main beams 9, and the included angle between the axes of the adjacent concrete secondary beams 10 is 20-30 degrees.
The concrete slab 2 upper portion is provided with concrete changeover portion 3, and concrete changeover portion 3 is the linear type thin wall structure of ring cross-section, and bottom ring diameter is greater than top ring diameter. The concrete transition section 3 is of an equal-thickness structure, the wall thickness of the concrete transition section is 0.5-1.5m, and prestressed steel strands are distributed in the middle. The annular bottom surface of the concrete transition section 3 is located on the middle ring beam 7, and the annular section of the bottom surface is consistent with the middle ring beam 7; the height of the concrete transition section 3 is 20-40 m. The concrete transition section 3 of the linear thin-walled structure helps to transfer the upper load into the concrete beam slab system and further to be dispersed onto the steel cylinder structure 1. The concrete transition piece 3 furthermore increases the dead weight of the entire structure, so that the entire structure can utilize the dead weight to resist a part of the horizontal load.
The upper part of the concrete transition section 3 is provided with a section of steel tower drum 4, and the steel tower drum 4 passes through the concrete transition section 3 and directly contacts with the concrete slab 2. The bottom end of the steel tower 4 is inserted between the second inner ring beam 8 and the first inner ring beam.
As shown in fig. 3 and 4, an elastic buffer device 5 is arranged between the steel tower 4 and the top of the concrete transition section 3, and the elastic buffer device 5 is arranged between the bottom of the steel tower 4 and the first inner ring beam and between the bottom of the steel tower 4 and the second inner ring beam 8.
As shown in fig. 5, the elastic buffer device 5 is formed by sequentially bonding a waterproof layer a, an antioxidant layer b, an elastic metal coil c, a first rubber layer d, a rubber bulge layer e and a second rubber layer f by colloid, wherein the total thickness is 0.2-1m, and the height is 0.8-1.8m.
The construction method of the multi-barrel combined foundation structure comprises the following steps:
(1) Prefabricating a steel cylinder structure 1 on land, and welding the steel cylinder structure 1 with a steel top plate;
(2) The steel top plate is taken as a bottom surface template of the concrete slab 2, steel bars are bound on the steel top plate, and pouring construction is carried out on the concrete slab 2, the outer ring beam 6, the middle ring beam 7, the first inner ring beam, the second inner ring beam 8, the concrete main beam 9, the concrete secondary beam 10 and the concrete transition section 3 together;
(3) Hanging the whole structure with the casting construction into water, checking air tightness, installing a steel tower 4 on a concrete slab 2, installing an elastic buffer device 5 between the bottom of the steel tower 4and a first inner ring beam, between the bottom of the steel tower 4and a second inner ring beam 8, and between the steel tower 4and the top of a concrete transition section 3, installing a machine head on the steel tower 4, and adjusting the draft of the steel tower structure 1 according to towing requirements;
(4) Floating and towing the multi-barrel combined foundation structure and the machine head;
(5) After the multi-barrel combined foundation structure and the machine head float and tow to a specified sea area, carrying out dead weight sinking firstly, and then carrying out negative pressure sinking to a specified position;
(6) And after sinking, reinforcing the soil body in the steel cylinder structure 1.
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, not restrictive, and many changes may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are to be construed as falling within the scope of the present invention.
Claims (9)
1. The elastic transition section cylindrical foundation structure comprises a steel cylinder structure with a cabin dividing structure, and is characterized in that the top of the steel cylinder structure is connected with a steel top plate, a concrete plate is arranged on the upper portion of the steel top plate, a concrete transition section is arranged on the upper portion of the concrete plate, the concrete transition section is of a linear thin-wall structure with a circular ring section, and the diameter of a bottom circular ring is larger than that of a top circular ring; the upper part of the concrete transition section is provided with a section of steel tower barrel, and the lower part of the steel tower barrel passes through the concrete transition section and contacts with the concrete slab;
the top surface of the concrete slab is provided with an outer ring beam, a middle ring beam, a first inner ring beam and a second inner ring beam; the outer ring beam is positioned at the outer side edge of the top surface of the concrete slab; the middle ring beam is positioned in the middle of the top surface of the concrete slab and is arranged at the lower part of the concrete transition section; the first inner ring beam is arranged on the inner side of the steel tower barrel, and the second inner ring beam is arranged on the outer side of the steel tower barrel; the bottom end of the steel tower cylinder is inserted between the second inner ring beam and the first inner ring beam;
Concrete main beams are radially and uniformly arranged on the top surface of the concrete slab, and extend from the second inner ring beam to the outer ring beam; concrete secondary beams are radially and uniformly arranged between every two adjacent concrete main beams on the top surface of the concrete slab, and extend from the middle ring beam to the outer ring beam;
The periphery of the steel top plate is provided with upward steel rib plates which are inserted into the concrete plate and the outer ring beam;
The steel tower cylinder is contacted with the top of the concrete transition section through an elastic buffer device, and the bottom of the steel tower cylinder is contacted with the first inner ring beam and the bottom of the steel tower cylinder is contacted with the second inner ring beam through the elastic buffer device; the elastic buffer device is composed of a waterproof layer, an antioxidant layer, an elastic metal coil, a first rubber layer, a rubber bulge layer and a second rubber layer in sequence.
2. A resilient transition piece tubular foundation structure according to claim 1, wherein the steel cylinder structure has a radius of 10-25m, a height of 5-15m and a cylinder wall thickness of 10-50mm.
3. A resilient transition piece tubular foundation structure according to claim 1, wherein said steel tubular structure is divided by dividing plates into a plurality of compartments, said plurality of compartments comprising a central compartment and a plurality of side compartments surrounding the periphery of the central compartment; the cylinder wall of the steel cylinder structure is connected with the dividing plate through welding, and the dividing plate is connected with the dividing plate through welding.
4. The elastic transition piece cylindrical foundation structure according to claim 1, wherein the steel cylinder structure is in accordance with the contour of the concrete slab and the steel roof, and the thickness of the concrete slab is 0.3-1m.
5. The elastic transition section cylindrical foundation structure according to claim 1, wherein the concrete transition section is of an equal-thickness structure, the wall thickness of the concrete transition section is 0.5-1.5m, and prestressed steel strands are distributed in the middle of the concrete transition section.
6. A resilient transition piece cartridge foundation structure according to claim 1, wherein the outer rim of said outer ring beam is flush with the outer rim of said concrete slab and conforms in shape to the rim of said concrete slab; the width of the outer ring beam is 0.5-1.5m, and the height is 0.8-1.8m; the middle ring beam is positioned in the middle of the top surface of the concrete slab, is ring-shaped, has the width of 0.5-1.5m and the height of 0.8-1.8m; the radius of the middle ring beam is 1.5-2.5 times of the radius of the steel tower barrel; the outer diameter of the first inner ring beam is smaller than the inner diameter of the steel tower barrel by 0.2m-1m, the width is 0.5-2.5m, and the height is 0.8-1.8m; the inner diameter of the second inner ring beam is 0.2m-1m larger than the outer diameter of the steel tower, the width is 0.5-2.5m, and the height is 0.8-1.8m.
7. The elastic transition section cylindrical foundation structure according to claim 1, wherein the width of the concrete main beam is 0.5-1.5m, and the height is 0.8-1.8m; the included angle between the adjacent concrete main beams is 60 degrees; the concrete secondary beams comprise 12-18 concrete secondary beams, 2-3 concrete secondary beams are arranged between every two adjacent concrete main beams, and the included angle between the axes of the adjacent concrete secondary beams is 20-30 degrees.
8. A resilient transition piece tubular foundation structure according to claim 1, wherein the resilient cushioning means has a thickness of 0.2-1m and a height of 0.8-1.8m.
9. A method of constructing a tubular foundation structure of an elastic transition piece according to any one of claims 1-8, comprising the steps of:
(1) After a steel cylinder structure with a cabin dividing structure is prefabricated on land, welding the steel cylinder structure with the steel top plate;
(2) Binding steel bars on the steel top plate serving as a bottom surface template of the concrete plate, and performing pouring construction on the concrete plate, the outer ring beam, the middle ring beam, the first inner ring beam, the second inner ring beam, the concrete main beam, the concrete secondary beam and the concrete transition section together;
(3) Hanging the integral structure with the casting construction into water, checking air tightness, installing the steel tower barrel on the concrete slab, installing an elastic buffer device between the bottom of the steel tower barrel and the first inner ring beam, between the bottom of the steel tower barrel and the second inner ring beam and between the steel tower barrel and the top of the concrete transition section, installing a machine head on the steel tower barrel, and adjusting the draft of the steel barrel structure according to towing requirements;
(4) Floating and towing the elastic transition section cylindrical foundation structure and the machine head;
(5) After the elastic transition section cylindrical foundation structure and the machine head float and tow to a designated sea area, the self weight of the elastic transition section cylindrical foundation structure and the machine head sink to a designated position under negative pressure;
(6) And after sinking, reinforcing the soil body in the steel cylinder structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573449.XA CN110424442B (en) | 2019-06-28 | 2019-06-28 | Elastic transition section cylindrical foundation structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573449.XA CN110424442B (en) | 2019-06-28 | 2019-06-28 | Elastic transition section cylindrical foundation structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110424442A CN110424442A (en) | 2019-11-08 |
| CN110424442B true CN110424442B (en) | 2024-05-10 |
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| CN111005400B (en) * | 2019-12-04 | 2024-07-19 | 天津大学 | Equipment and method for preparing offshore wind torch type foundation in movable mode |
| CN112112188A (en) * | 2020-09-30 | 2020-12-22 | 长江勘测规划设计研究有限责任公司 | Polygonal cylindrical foundation for offshore wind power |
| CN114991195A (en) * | 2022-05-26 | 2022-09-02 | 天津大学 | Cylindrical foundation structure combining wave energy and wind power generation and construction method thereof |
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