WO2023143148A1 - Fondation d'éolienne présentant une paroi moulée souterraine de type en nid d'abeilles et procédé de construction de fondation d'éolienne - Google Patents

Fondation d'éolienne présentant une paroi moulée souterraine de type en nid d'abeilles et procédé de construction de fondation d'éolienne Download PDF

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Publication number
WO2023143148A1
WO2023143148A1 PCT/CN2023/072198 CN2023072198W WO2023143148A1 WO 2023143148 A1 WO2023143148 A1 WO 2023143148A1 CN 2023072198 W CN2023072198 W CN 2023072198W WO 2023143148 A1 WO2023143148 A1 WO 2023143148A1
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WO
WIPO (PCT)
Prior art keywords
honeycomb
underground
wall
diaphragm wall
continuous wall
Prior art date
Application number
PCT/CN2023/072198
Other languages
English (en)
Chinese (zh)
Inventor
蒋河川
张立英
张国
张明杰
王献文
孟欣
易里坤
王学平
鲁莫尔
赵广赫
Original Assignee
中国华能集团清洁能源技术研究院有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国华能集团清洁能源技术研究院有限公司 filed Critical 中国华能集团清洁能源技术研究院有限公司
Publication of WO2023143148A1 publication Critical patent/WO2023143148A1/fr

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/30Foundations made with permanent use of sheet pile bulkheads, walls of planks, or sheet piling boxes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22Foundations specially adapted for wind motors
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/0023Cast, i.e. in situ or in a mold or other formwork
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/728Onshore wind turbines

Definitions

  • the disclosure belongs to the technical field of wind power, and in particular relates to a fan foundation with a honeycomb underground continuous wall and a construction method thereof.
  • Onshore wind turbines are one of the important forms of wind power generation.
  • the superstructure of the wind turbine is relatively large and heavy, so the stability of the foundation of the wind turbine against overturning, shearing, and fatigue is very important.
  • Common forms of onshore wind turbine foundations include pile foundations, extended foundations, etc.
  • the pile foundation is composed of foundation piles set vertically or obliquely in the foundation, and connected with the cap to bear the upper load.
  • the extended foundation is to expand the foundation section appropriately so that the load acting on the base is less than the maximum bearing capacity allowed by the foundation.
  • the weight and load of the wind turbine tower have increased the safety requirements for the wind turbine infrastructure. Under such conditions, traditional wind turbine foundations have problems such as small bearing capacity and large footprint, which cannot meet the needs of large-capacity wind turbines.
  • embodiments of the present disclosure propose a fan foundation with a honeycomb structure underground diaphragm wall.
  • the wind turbine foundation with a honeycomb structure underground diaphragm wall includes: a honeycomb type underground diaphragm wall and a platform.
  • the cross-section perpendicular to the vertical direction of the honeycomb underground diaphragm wall is a honeycomb structure, and a number of holes extending along the vertical direction are defined in the honeycomb type underground diaphragm wall, and the holes are filled with soil.
  • the platform is located above and connected to the honeycomb underground continuous wall.
  • the cellular underground continuous wall includes several honeycomb units closely arranged, the holes are defined in the middle of the honeycomb units, and a section of wall is shared by adjacent honeycomb units.
  • the honeycomb unit is a hollow regular polygonal prism structure.
  • the honeycomb unit is a hollow regular hexagonal prism structure.
  • the cellular underground continuous wall is composed of seven honeycomb units with the same structure, and six of the honeycomb units are arranged around the central honeycomb unit and connected in sequence.
  • the side length of the outer peripheral contour of the cross-section perpendicular to the vertical direction of the honeycomb unit is 1.5-2.5m.
  • the thickness of the cellular underground continuous wall is greater than or equal to 400 mm.
  • the height of the honeycomb underground continuous wall in the vertical direction is 10-20m.
  • the cellular underground continuous wall is a symmetrical structure.
  • the wind turbine foundation is the wind turbine foundation according to the above-mentioned embodiments of the present disclosure, and the construction method includes:
  • Step 1 Construct the guide wall
  • Step 2 Groove construction and groove cleaning work
  • Step 3 prefabricating the reinforcement cage and sinking the reinforcement cage into the groove
  • Step 4 pouring concrete to form the honeycomb underground continuous wall
  • Step 5 pouring to form the cap.
  • Fig. 1 is a structural diagram of a honeycomb underground diaphragm wall fan foundation provided by an embodiment of the present disclosure.
  • Fig. 2 is a cross-sectional view of the honeycomb underground continuous wall provided by the embodiment of the present disclosure.
  • FIG. 3 is a partially enlarged schematic view of FIG. 1 .
  • Fan foundation 100 honeycomb underground diaphragm wall 1; honeycomb unit 11; hole 12; cap 2; anchor bolt cage assembly 3; flange 31; upper anchor plate 32; high-strength grouting material 33; anchor rod 34; lower anchor plate 35; steel cage 4.
  • FIGS. 1-3 The basic structure of the wind turbine foundation 100 with honeycomb underground diaphragm wall in the embodiment of the present disclosure will be described below according to FIGS. 1-3 .
  • the wind turbine foundation 100 includes a honeycomb underground continuous wall 1 and a platform 2 .
  • the honeycomb underground diaphragm wall 1 is buried underground as the support structure of the fan foundation 100, the bottom of the cap 2 is connected to the top of the honeycomb underground diaphragm wall 1, the top of the cap 2 is flush with the ground, and the top of the cap 2 is used for Connect to above-ground structures such as wind turbines.
  • both the honeycomb underground diaphragm wall 1 and the platform 2 are located below the ground level, and the honeycomb underground diaphragm wall 1 is located below the platform 2 .
  • the honeycomb underground continuous wall 1 is composed of a continuous wall body extending in the vertical direction, and its cross section perpendicular to the vertical direction is a honeycomb structure.
  • the honeycomb underground continuous wall 1 includes several honeycomb units 11, which are closely arranged to form the honeycomb underground continuous wall 1.
  • the middle part of each honeycomb unit 11 defines a hole 12 extending in the vertical direction, and the hole 12 is filled with soil . It can be understood that adjacent honeycomb units 11 share one cell wall (wall body).
  • the honeycomb unit 11 is a cylindrical structure, and the walls of several honeycomb units 11 are connected to each other to form a honeycomb underground continuous wall 1 extending in the vertical direction, and each hole 12 inside the honeycomb underground continuous wall 1 is filled with soil , the soil filled in the hole 12 plays a role in further enhancing the anti-overturning and anti-extrusion properties of the fan foundation.
  • the fan foundation in the embodiment of the present disclosure includes a honeycomb underground diaphragm wall for supporting the platform.
  • the honeycomb underground diaphragm wall is composed of several honeycomb units arranged closely.
  • the foundation soil on the outside and inside of the underground diaphragm wall exerts a certain pressure on the wall, making the honeycomb underground diaphragm wall's anti-extrusion ability, anti-overturning stability and bearing capacity better than traditional diaphragm walls with circular or single polygonal cross-sections. structure.
  • the honeycomb underground diaphragm wall has a strong bearing capacity, it can have a smaller footprint while meeting the load requirements of the wind turbine.
  • the wind turbine foundation of the embodiments of the present disclosure can be applied to the foundation of land wind turbines, especially the natural foundation of large-capacity wind turbines.
  • the extension direction of the fan foundation 100 is defined as the up and down direction, and the up and down directions are shown by the arrows in FIG. 1 .
  • the honeycomb underground diaphragm wall fan foundation 100 includes a honeycomb underground diaphragm wall 1 , a cap 2 , an anchor bolt cage assembly 3 and a reinforcement cage 4 .
  • the honeycomb underground continuous wall 1 is formed by a plurality of closely arranged honeycomb units 11, and adjacent honeycomb units 11 share a section of wall. It can be understood that the walls of several closely arranged honeycomb units 11 are in a continuous structure, that is, one-piece walls formed by one-time pouring.
  • the structural shapes of several honeycomb units 11 constituting the honeycomb underground continuous wall 1 are the same, and the honeycomb units 11 are hollow regular hexagonal prism structures.
  • the cross section of the honeycomb unit 11 perpendicular to the vertical direction is a regular hexagonal structure.
  • the outer peripheral contour of the cross section of the honeycomb unit 11 perpendicular to the vertical direction is a regular hexagon
  • the inner peripheral contour of the cross section of the honeycomb unit 11 perpendicular to the vertical direction is a regular hexagon
  • the cross section of the central hole 12 of the honeycomb unit 11 is a regular hexagon.
  • the inner peripheral profile of the cross section perpendicular to the vertical direction of the honeycomb unit 11 may be circular or other shapes, that is, the cross section of the central hole 12 of the honeycomb unit 11 may be circular or other shapes.
  • the honeycomb underground continuous wall 1 in this embodiment is composed of seven honeycomb units 11 densely arranged and connected to each other. As shown in FIG. 2 , one honeycomb unit 11 is located in the middle, and the other six honeycomb units 11 are arranged in sequence around the central honeycomb unit 11 . It can be understood that the honeycomb units 11 located at the periphery all share a section of wall with the honeycomb unit 11 in the middle, and since the honeycomb unit 11 in this embodiment is formed by connecting six sections of walls end to end, the honeycomb unit 11 in the middle is formed All the walls are shared with other cellular unit 11 walls. Therefore, it can also be considered that the honeycomb unit 11 in the middle is formed by six honeycomb units 11 successively connected in the circumferential direction.
  • both the exterior of the honeycomb underground diaphragm wall 1 and the interior of the hole 12 have compacted soil, and the soil provides a certain compressive force for the wall to support the wall.
  • the bending moment load is transmitted downward to the honeycomb underground diaphragm wall 1, and each section of the wall of each honeycomb unit 11 constituting the honeycomb underground diaphragm wall 1 can jointly share the bending moment load
  • the honeycomb underground continuous wall 1 provided by the embodiment of the present disclosure has stronger anti-overturning stability than the related art.
  • the honeycomb structure of the honeycomb underground diaphragm wall 1 when its internal hole 12 is filled with soil, it can withstand greater pressure from the external soil, so the honeycomb provided by the embodiment of the present disclosure Compared with the related technology, the type underground diaphragm wall 1 has stronger anti-compression performance.
  • the honeycomb underground continuous wall 1 can be composed of other numbers of honeycomb units 11, or the honeycomb units 11 that make up the honeycomb underground continuous wall 1 can also have other arrangements, and this disclosure does not limit.
  • the honeycomb unit 11 is not limited to the above-mentioned regular hexagonal prism structure, for example, in other alternative embodiments, the honeycomb unit 11 may also be a regular triangular prism structure, a regular square prism structure, and the like.
  • the honeycomb underground continuous wall 1 can be composed of six honeycomb units 11, the six honeycomb units 11 are arranged in sequence along the circumference and two adjacent honeycomb units 11 share a section of wall, forming a regular hexagonal prism structure Honeycomb underground diaphragm wall 1.
  • the honeycomb units 11 constituting the honeycomb underground continuous wall 1 may include various types, for example, the honeycomb units 11 of the regular triangular prism structure and the honeycomb units 11 of the regular hexagonal prism structure are arranged in a mixed manner.
  • the honeycomb unit 11 is not a regular polygonal prism structure, the construction is more difficult, and the stress on each side is uneven. Therefore, it is preferable to choose the shape of the honeycomb unit 11 to be a regular polygonal prism structure, so that the stress on each section of the wall is uniform, and the construction is convenient.
  • the honeycomb underground continuous wall 1 has the same size in multiple directions, or in other words, the honeycomb underground continuous wall 1 has a symmetrical structure, so that the structure of the fan foundation 100 is more stable and reliable.
  • the side length of the outer peripheral contour (regular hexagon) of the cross section of the honeycomb unit 11 perpendicular to the vertical direction is 1.5-2.5m. Further optionally, the side length of the outer peripheral contour (regular hexagon) of the cross section of the honeycomb unit 11 perpendicular to the vertical direction is 1.5-2.0m, such as any value among 1.5m, 2m, and 2.5m.
  • the thickness of the honeycomb underground continuous wall 1 is greater than or equal to 400mm.
  • the thickness of the honeycomb underground continuous wall 1 can be any value of 400mm, 500mm, 700mm, or 1000mm.
  • the strength of the honeycomb underground diaphragm wall 1 is not lower than C20.
  • the height of the honeycomb underground continuous wall 1 is 10-20m, for example, the height of the honeycomb underground continuous wall 1 is any one of 10m, 12m, 14m, 16m, 18m and 20m.
  • the platform 2 is a circular expanded foundation platform.
  • the central axis (vertical direction) of the honeycomb underground diaphragm wall 1 and the central axis of the circular expanded foundation cap 2 are on a straight line.
  • the diameter of the circular section of the bottom surface of the platform 2 is 8m-14m.
  • the diameter and length of the circular section of the bottom surface of the platform 2 can be any value selected from 8m, 10m, 12m, and 14m. It should be noted that, The circular section diameter of the bottom surface of the platform cap 2 should be greater than the maximum width of the honeycomb underground diaphragm wall 1 .
  • the anchor bolt assembly 3 includes a flange 31 , an upper anchor plate 32 , a high-strength grouting material 33 , an anchor rod 34 and a lower anchor plate 35 .
  • the upper anchor plate 32 is located above the cap 2 , the upper surface of the upper anchor plate 32 and the cap 2 is filled with a high-strength grouting material 33 , and the flange 31 is located above the upper anchor plate 32 .
  • the lower anchor plate 35 is positioned at the bottom of the cap 2 , the anchor rod 4 is positioned in the cap 2 , the upper end passes through the flange 31 and is tensioned, and the lower end is connected with the lower anchor plate 35 to strengthen the strength of the cap 2 .
  • the reinforcement cage 4 is located in the honeycomb underground diaphragm wall 1 and is used to enhance the structural strength of the poured honeycomb underground diaphragm wall 1 .
  • the reinforcement cage 4 is a continuous structure and corresponds to the wall structure of the honeycomb underground diaphragm wall 1, so that the structural strength of the honeycomb underground diaphragm wall 1 is optimized, or the reinforcement cage 4 is spliced by multiple sections of steel bars, so as to Simplify construction difficulty.
  • the reinforcement cage 4 may only be arranged in a part of the honeycomb underground continuous wall 1 to reduce the construction cost.
  • the top of the steel cage 4 protrudes from the top of the honeycomb underground diaphragm wall 1 and extends into the cap 2, so as to improve the structural stability of the honeycomb underground diaphragm wall.
  • the reinforcement cage 4 that goes deep into the platform 2 can be connected with the reinforcement (not shown in the figure) inside the platform 2 to further increase the connection strength and rigidity.
  • the bottom of the reinforcement cage 4 is flush with the bottom of the honeycomb underground continuous wall 1 , so as to optimize the structural strength of the honeycomb underground continuous wall 1 .
  • the bottom of the steel cage 4 can be located above the bottom of the honeycomb underground continuous wall 1, that is, the steel cage 4 does not need to penetrate the honeycomb underground continuous wall 1 up and down, so as to save construction costs.
  • Embodiments of the present disclosure also propose a construction method for the wind turbine foundation 100 .
  • the fan foundation 100 is the fan foundation 100 with the honeycomb underground diaphragm wall 1 in any of the above-mentioned embodiments, and the construction method mainly includes: Step 1 to Step 5.
  • Step 1 Construct the guide wall
  • Step 2 Groove construction and groove cleaning work
  • Step 3 prefabricating the reinforcement cage and sinking the reinforcement cage into the groove
  • Step 4 pouring concrete to form a honeycomb underground continuous wall
  • Step 5 Pouring to form caps.
  • the fan foundation with the honeycomb structure underground diaphragm wall through the setting of the honeycomb structure underground diaphragm wall, the anti-overturning stability of the fan is enhanced, the strength of the fan foundation is improved, the service life of the fan is extended, and the cost of the fan foundation is reduced. footprint.
  • step of forming the honeycomb underground diaphragm wall 1 in step 4 is an integrated pouring method, and the conduit method can be used for underwater concrete pouring, and the reinforcement cage 4 in step 3 is poured therein.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
  • a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch.
  • “above”, “above” and “above” the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • “Below”, “beneath” and “beneath” the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the terms “one embodiment,””someembodiments,””example,””specificexamples,” or “some examples” mean a specific feature, structure, material, or feature described in connection with the embodiment or example. Features are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may refer to the Different embodiments or examples and features of different embodiments or examples described are combined and combined.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
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  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
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  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

Fondation d'éolienne (100) présentant une paroi moulée souterraine de type en nid d'abeilles (1) et procédé de construction. La fondation d'éolienne (100) présentant la paroi moulée souterraine de type en nid d'abeilles (1) comprend la paroi moulée souterraine de type en nid d'abeilles (1) et un capuchon de pieu (2). La paroi moulée souterraine de type en nid d'abeilles (1) est enfouie dans une fondation, le capuchon de pieu (2) est situé au-dessus de la paroi moulée souterraine de type en nid d'abeilles (1) et relié à cette dernière, et la section transversale, perpendiculaire à la direction verticale, de la paroi moulée souterraine de type en nid d'abeilles (1) est d'une structure en nid d'abeilles. Une pluralité de trous (12) s'étendant dans la direction verticale sont délimités dans la paroi moulée souterraine de type en nid d'abeilles (1), et les trous (12) sont remplis de terre.
PCT/CN2023/072198 2022-01-26 2023-01-13 Fondation d'éolienne présentant une paroi moulée souterraine de type en nid d'abeilles et procédé de construction de fondation d'éolienne WO2023143148A1 (fr)

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CN202210094469.0 2022-01-26
CN202210094469.0A CN114837210A (zh) 2022-01-26 2022-01-26 具有蜂窝式地下连续墙的风机基础及其施工方法

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WO2023143148A1 true WO2023143148A1 (fr) 2023-08-03

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PCT/CN2023/072198 WO2023143148A1 (fr) 2022-01-26 2023-01-13 Fondation d'éolienne présentant une paroi moulée souterraine de type en nid d'abeilles et procédé de construction de fondation d'éolienne

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114837210A (zh) * 2022-01-26 2022-08-02 华能清能通榆电力有限公司 具有蜂窝式地下连续墙的风机基础及其施工方法

Citations (7)

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JPH07166561A (ja) * 1994-06-06 1995-06-27 Ohbayashi Corp 大型基礎の構築方法
CN102359118A (zh) * 2011-08-02 2012-02-22 北京健安诚岩土工程有限公司 地下连续墙环形基础及其建造方法
US20120070233A1 (en) * 2010-09-17 2012-03-22 Ensoft, Inc. Foundation for wind turbine generator
CN102808530A (zh) * 2012-08-23 2012-12-05 成都赛珞仓储工程设计有限公司 一种空腹箱体立壁组合式蜂窝形贮仓
CN104234069A (zh) * 2013-06-07 2014-12-24 刘红静 具有下插式蜂窝结构底盘的海上风力发电机基础
CN112854288A (zh) * 2021-03-11 2021-05-28 同济大学建筑设计研究院(集团)有限公司 一种由地下连续墙组成的风机筒形基础及施工方法
CN114837210A (zh) * 2022-01-26 2022-08-02 华能清能通榆电力有限公司 具有蜂窝式地下连续墙的风机基础及其施工方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07166561A (ja) * 1994-06-06 1995-06-27 Ohbayashi Corp 大型基礎の構築方法
US20120070233A1 (en) * 2010-09-17 2012-03-22 Ensoft, Inc. Foundation for wind turbine generator
CN102359118A (zh) * 2011-08-02 2012-02-22 北京健安诚岩土工程有限公司 地下连续墙环形基础及其建造方法
CN102808530A (zh) * 2012-08-23 2012-12-05 成都赛珞仓储工程设计有限公司 一种空腹箱体立壁组合式蜂窝形贮仓
CN104234069A (zh) * 2013-06-07 2014-12-24 刘红静 具有下插式蜂窝结构底盘的海上风力发电机基础
CN112854288A (zh) * 2021-03-11 2021-05-28 同济大学建筑设计研究院(集团)有限公司 一种由地下连续墙组成的风机筒形基础及施工方法
CN114837210A (zh) * 2022-01-26 2022-08-02 华能清能通榆电力有限公司 具有蜂窝式地下连续墙的风机基础及其施工方法

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