CN114482114A - Spiral pile-cylinder composite foundation structure based on fixed support and construction method thereof - Google Patents

Spiral pile-cylinder composite foundation structure based on fixed support and construction method thereof Download PDF

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Publication number
CN114482114A
CN114482114A CN202210107176.1A CN202210107176A CN114482114A CN 114482114 A CN114482114 A CN 114482114A CN 202210107176 A CN202210107176 A CN 202210107176A CN 114482114 A CN114482114 A CN 114482114A
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China
Prior art keywords
bearing
pile
top cover
cylinder
foundation structure
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Pending
Application number
CN202210107176.1A
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Chinese (zh)
Inventor
杨旭
刘润
练继建
鲁文鹤
王小合
刘玉飞
杨庆山
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Tianjin University
Chongqing University
Huadian Heavy Industries Co Ltd
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Tianjin University
Chongqing University
Huadian Heavy Industries Co Ltd
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Application filed by Tianjin University, Chongqing University, Huadian Heavy Industries Co Ltd filed Critical Tianjin University
Priority to CN202210107176.1A priority Critical patent/CN114482114A/en
Publication of CN114482114A publication Critical patent/CN114482114A/en
Pending legal-status Critical Current

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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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/56—Screw piles
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The invention discloses a spiral pile-cylinder composite foundation structure based on a fixed support and a construction method thereof. The plurality of fixed triangular supports can uniformly transmit auxiliary sinking load provided by the spiral pile to the cylindrical foundation top cover, so that structural damage caused by concentrated stress on the cylindrical top cover in the sinking process is avoided; by adopting the large bearing, only the sunken vertical load can be transmitted to the cylindrical foundation, and the rotating torque can not be transmitted to the cylindrical foundation; after sinking, cylindric basic top cap, fixed bolster, bearing, sleeve can become a whole, further improves foundation structure's bearing capacity. In addition, the structure is simple, and each part is easy to manufacture, so that the structure has a good application prospect.

Description

Spiral pile-cylinder composite foundation structure based on fixed support and construction method thereof
Technical Field
The invention belongs to the technical field of offshore wind power, and particularly relates to a spiral pile-cylinder composite foundation structure based on a fixed support and a construction method thereof.
Background
Offshore wind power development potential of the east coastal region of China exceeds 2 hundred million kilowatts, and wind power energy reserves are quite abundant. The offshore wind power has the advantages of low turbulence, excellent wind resource, no land occupation, being close to developed coastal areas in China and the like. In recent years, with the continuous improvement of the relevant policies of 'carbon neutralization' and 'carbon peak-reaching' in various fields and the continuous maturation of the offshore wind power technology, the offshore wind power in China will meet a new round of development hot tide and gradually and rapidly develop from the offshore-small capacity-large cost direction to the deep sea-large capacity-low cost direction.
Cylindrical foundation structures are one of the foundation structure forms which have been developed faster in the field of offshore wind power in recent years. The cylindrical foundation is in a wide and shallow foundation structure form, has a large area, can effectively utilize soil in the cylinder after sinking, has good anti-overturning capability, and is very suitable for large-capacity offshore wind power with large horizontal load. The cylinder structure usually adopts air-float towing and negative pressure sinking to complete construction and installation, and the offshore operation period is short. However, for an environment with shallow water depth, the negative pressure extracted from the barrel in the sinking process may not meet the requirement of the sinking negative pressure, resulting in failure of sinking installation. So that a plurality of scholars and engineering experts consider adopting a proper device to carry out auxiliary sinking of the cylindrical foundation. Recently, a screw pile-barrel composite foundation structure combining a screw pile and a barrel-shaped foundation is provided, which utilizes the advantage of controllable sinking of a rotary screw pile to assist the barrel-shaped foundation to sink, ensures that the barrel-shaped foundation can also finish sinking operation under the condition of under-negative pressure, and effectively reduces the installation risk. In addition, the helical pile further improves the pulling resistance and the compressive capacity of the whole structure due to the fact that the helical blades are embedded into the soil body, and the bearing capacity is improved.
However, the current design scheme of the screw pile-cylinder composite foundation structure has certain technical difficulties: the spiral pile rotates through the overlying torque device to screw the pile body into the soil body, and the most ideal state is to uniformly transmit the sinking vertical force to the top cover of the cylindrical foundation in the rotating sinking process, while the rotating torque is not transmitted to the cylindrical foundation. However, in most of the current designs, the contact area between the pile body and the cylinder is small, the force transmission effect is not good, and the risk of large damage caused by local stress exists; and partial design even fixedly connects the cylindrical foundation with the screw pile, so that the cylindrical foundation can rotate along with the screw pile in the sinking process. Obviously, the above design defects make the screw pile-cylinder composite foundation structure difficult to popularize and apply.
Therefore, the invention provides a spiral pile-cylinder composite foundation structure based on a fixed support, which has good force transmission characteristic, only transmits vertical force but not horizontal force, and greatly improves the practical applicability of the spiral pile-cylinder composite foundation structure.
Disclosure of Invention
The application aims to provide a screw pile-barrel composite foundation structure adopting a fixing support for sinking and force transmission and a construction method thereof, the structure can effectively and uniformly disperse and transmit the sinking force of the screw pile to a barrel-shaped foundation top cover, the stress of the barrel-shaped foundation is optimized, and the structural safety is ensured.
The invention is realized by the following technical scheme:
a screw pile-barrel composite foundation structure based on a fixed support comprises a barrel-shaped foundation and a screw pile;
the cylindrical foundation comprises a cylinder wall, a cylinder top cover, a subdivision plate, a sleeve, a bearing and a fixed support; the cylinder top cover is connected to the upper end edge of the cylinder wall, the compartment plate is arranged in the cylinder wall, a through hole is formed in the center of the cylinder top cover, the sleeve is arranged above the through hole, the bearing is arranged above the sleeve, and the fixed support is radially and uniformly arranged on the upper surface of the cylinder top cover and is fixedly connected with the bearing, the sleeve and the cylinder top cover;
the spiral pile penetrates through the through holes of the bearing, the sleeve and the cylinder top cover, and is rotatably connected with the bearing through a protruding ring on the pile wall.
In the technical scheme, the cylinder wall is made of reinforced concrete or steel, the diameter is 30-40 m, and the height is 5-15 m.
In the above technical scheme, the material of the cylinder top cover is reinforced concrete or steel.
In the above technical solution, the subdivision plates are arranged in a honeycomb shape.
In the technical scheme, the number of the fixing supports is 4-8.
A construction method of a spiral pile-cylinder composite foundation structure based on a fixed support comprises the following steps:
the composite foundation structure sinks at a target place, the spiral pile sinks by the rotation of the top torque device, the auxiliary sinking force of the spiral pile is transmitted to each fixing support through the bearing in the sinking process, then the auxiliary sinking force is transmitted to the barrel top cover through the fixing supports, and after the spiral pile is sunk in place, the spiral pile is locked with the bearing and the barrel, and the spiral pile and the bearing and the barrel are of a bearing structure.
Compared with the prior art, the invention has the advantages that:
the invention discloses a spiral pile-cylinder composite foundation structure based on a fixed support and a construction method thereof. The plurality of fixed triangular supports can uniformly transmit auxiliary sinking load provided by the spiral pile to the cylindrical foundation top cover, so that structural damage caused by concentrated stress on the cylindrical top cover in the sinking process is avoided; by adopting the large bearing, only the sunken vertical load can be transmitted to the cylindrical foundation, and the rotating torque can not be transmitted to the cylindrical foundation; after sinking, cylindric basic top cap, fixed bolster, bearing, sleeve can become a whole, further improves foundation structure's bearing capacity. In addition, the structure is simple, and each part is easy to manufacture, so that the structure has a good application prospect.
Drawings
FIG. 1 is a schematic top view of a screw pile-cylinder composite foundation structure based on a fixed support;
FIG. 2 is a schematic bottom view of a screw pile-cylinder composite foundation structure based on a fixed support;
fig. 3 is an exploded view of a screw pile-cylinder composite foundation structure based on a fixed support.
In the figure: 1. a cylinder wall; 2. performing spiral pile; 2-1, a convex ring; 3. a bearing; 4. a sleeve; 5. fixing a bracket; 6. a cartridge top cover; 7. a subdivision board.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical scheme of the invention is further explained by combining specific examples.
Examples
A spiral pile-cylinder composite foundation structure based on a fixed support comprises a cylinder wall 1, a spiral pile 2, a bearing 3, a sleeve 4, a fixed support 5, a cylinder top cover 6 and a cabin dividing plate 7. The cylinder wall 1 is of a reinforced concrete structure or a steel structure, the diameter and the height of the cylinder wall are adjusted according to actual engineering requirements, the diameter is generally 30-40 m, and the height is generally 5-15 m; the top of the cylinder wall 1 is provided with a cylinder top cover 6 which is of a steel structure or a reinforced concrete structure, and the diameter of the cylinder top cover is consistent with that of the cylinder wall 1; the sleeve 4 is arranged in the middle of the barrel top cover 6, the sleeve 4 is fixedly connected with the barrel top cover 6, and the inner diameter of the sleeve 4 is slightly smaller than the diameter of the spiral pile 2; the spiral pile 2 is inserted into the sleeve 4, the diameter of the spiral pile 2 is determined according to specific engineering requirements, the pile wall of the spiral pile 2 is provided with a convex ring 2-1, the spiral pile 2 is installed in a bearing 3 through the convex ring 2-1, the spiral pile 2 can rotate in the sleeve 4, and vertical load is transmitted through the bearing 3; bearing 3 external connection fixed bolster 5, fixed bolster 5 are steel construction tripod, 4 ~ 8 radial evenly distributed of cover are in 2 weeks circles of screw pile, 5 tops of fixed bolster and bearing 3 fixed connection, lower part and 6 fixed connection of section of thick bamboo top cap.
In the process of sinking, the screw pile 2 is sunk by the rotation of the top torque device, the auxiliary sinking force of the screw pile is transmitted to each fixed support 5 through the bearing 3 in the process of sinking, and then is transmitted to the cylinder top cover 6 through the fixed supports 5, so that the stress of the cylinder top cover 6 in the process of sinking is ensured to be uniform. After the screw pile 2 is sunk in place, the screw pile 2, the bearing 3 and the sleeve 4 are locked to form a bearing structure together.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.

Claims (6)

1. A screw pile-barrel composite foundation structure based on a fixed support is characterized in that: comprises a cylindrical foundation and a spiral pile;
the cylindrical foundation comprises a cylinder wall, a cylinder top cover, a subdivision plate, a sleeve, a bearing and a fixed support; the cylinder top cover is connected to the upper end edge of the cylinder wall, the compartment plate is arranged in the cylinder wall, a through hole is formed in the center of the cylinder top cover, the sleeve is arranged above the through hole, the bearing is arranged above the sleeve, and the fixed support is radially and uniformly arranged on the upper surface of the cylinder top cover and is fixedly connected with the bearing, the sleeve and the cylinder top cover;
the spiral pile penetrates through the through holes of the bearing, the sleeve and the cylinder top cover, and is rotatably connected with the bearing through a protruding ring on the pile wall.
2. A screw pile-tube composite foundation structure based on a fixing bracket according to claim 1, characterized in that: the cylinder wall is made of reinforced concrete or steel, the diameter of the cylinder wall is 30-40 m, and the height of the cylinder wall is 5-15 m.
3. A screw pile-tube composite foundation structure based on a fixing bracket according to claim 1, characterized in that: the top cover of the barrel is made of reinforced concrete or steel.
4. A screw pile-tube composite foundation structure based on a fixing bracket according to claim 1, characterized in that: the cabin separation plates are arranged in a honeycomb shape.
5. A screw pile-tube composite foundation structure based on a fixing bracket according to claim 1, characterized in that: the number of the fixed supports is 4-8.
6. A construction method of a spiral pile-cylinder composite foundation structure based on a fixed support is characterized by comprising the following steps:
the composite foundation structure sinks at a target place, the spiral pile sinks by the rotation of the top torque device, the auxiliary sinking force of the spiral pile is transmitted to each fixing support through the bearing in the sinking process, then the auxiliary sinking force is transmitted to the barrel top cover through the fixing supports, and after the spiral pile is sunk in place, the spiral pile is locked with the bearing and the barrel, and the spiral pile and the bearing and the barrel are of a bearing structure.
CN202210107176.1A 2022-01-28 2022-01-28 Spiral pile-cylinder composite foundation structure based on fixed support and construction method thereof Pending CN114482114A (en)

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CN202210107176.1A CN114482114A (en) 2022-01-28 2022-01-28 Spiral pile-cylinder composite foundation structure based on fixed support and construction method thereof

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070125037A1 (en) * 2005-11-18 2007-06-07 Karl-Heinz Meiners Segment for a tower of a wind energy turbine and method for arranging operating components of a wind energy turbine in a tower thereof
CN102877484A (en) * 2012-09-11 2013-01-16 天津大学 Steel-concrete composite cylinder-type foundation structure and construction method thereof
CN103603343A (en) * 2013-11-07 2014-02-26 北城致远集团有限公司 Deep foundation construction support
CN106049524A (en) * 2016-07-27 2016-10-26 天津大学前沿技术研究院有限公司 Composite cylinder type foundation with auxiliary piles added in later period
CN113513039A (en) * 2021-06-18 2021-10-19 天津大学 Offshore wind power variable-diameter spiral pile composite cylindrical foundation and construction method thereof
CN214952258U (en) * 2021-04-08 2021-11-30 伊春鹿鸣矿业有限公司 Quick sampling device of metal concentrate powder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070125037A1 (en) * 2005-11-18 2007-06-07 Karl-Heinz Meiners Segment for a tower of a wind energy turbine and method for arranging operating components of a wind energy turbine in a tower thereof
CN102877484A (en) * 2012-09-11 2013-01-16 天津大学 Steel-concrete composite cylinder-type foundation structure and construction method thereof
CN103603343A (en) * 2013-11-07 2014-02-26 北城致远集团有限公司 Deep foundation construction support
CN106049524A (en) * 2016-07-27 2016-10-26 天津大学前沿技术研究院有限公司 Composite cylinder type foundation with auxiliary piles added in later period
CN214952258U (en) * 2021-04-08 2021-11-30 伊春鹿鸣矿业有限公司 Quick sampling device of metal concentrate powder
CN113513039A (en) * 2021-06-18 2021-10-19 天津大学 Offshore wind power variable-diameter spiral pile composite cylindrical foundation and construction method thereof

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