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CN-122013807-A - Offshore wind power steel pipe concrete single pile foundation and construction method thereof

CN122013807ACN 122013807 ACN122013807 ACN 122013807ACN-122013807-A

Abstract

The invention discloses a offshore wind power steel pipe concrete single pile foundation and a construction method thereof. The outer wall of the pile pipe is an integral steel pipe, an inner cavity penetrating through two ends is formed in the pile pipe, the pile pipe comprises a lower pile body and an upper pile body which are sequentially connected, when the pile pipe penetrates through the designed depth, the lower pile body is buried into the seabed, and the upper pile body is soaked in water. The inner cavity is filled with concrete to form an annular reinforced concrete lining layer, and the outer wall of the annular reinforced concrete lining layer is connected with the inner wall of the upper pile body to jointly form a composite bearing structure. The periphery of the lower pile body is circumferentially provided with a plurality of wing plates at intervals, and the structural strength and the soil horizontal resistance are improved through the rigidity transition of the wing plates and the lower pile body. According to the invention, the annular reinforced concrete lining layer is arranged on the upper pile body, and the wing plates are arranged on the lower pile body, so that the vibration frequency and fatigue resistance of a single pile foundation are effectively improved, the foundation structure is simplified, the manufacturing cost and the construction difficulty are reduced, and the method is suitable for deep-open sea large megawatt fan foundation construction.

Inventors

  • SUN LUWEI
  • XU XIAOBIN
  • LI ZHOUXING
  • PANG ZHENFEI

Assignees

  • 深圳市普罗海洋科技有限责任公司
  • 深圳亚纳海洋科技有限公司

Dates

Publication Date
20260512
Application Date
20260328

Claims (9)

  1. 1. An offshore wind power concrete filled steel tube single pile foundation, comprising: The pile tube (1), the outer wall of the pile tube (1) is an integral steel tube and is provided with an inner cavity (11), the inner cavity (11) penetrates through two ends of the pile tube (1), the pile tube (1) comprises a lower pile body (12) and an upper pile body (13) which are sequentially connected along the length direction of the pile tube (1), the lower pile body (12) is used for being buried in a seabed, and the upper pile body (13) is used for being immersed in water above the seabed; the annular reinforced concrete inner liner (2), annular reinforced concrete inner liner (2) are located in inner chamber (11), the outer wall of annular reinforced concrete inner liner (2) with the inner wall of upper portion pile body (13) is connected to constitute the composite bearing structure jointly.
  2. 2. The offshore wind power concrete filled steel tube single pile foundation of claim 1, wherein the inner wall of the upper pile body (13) is provided with a first alignment mark (3) which is higher than the sea level, and the inner wall of the upper pile body (13) is provided with a second alignment mark (4) which is used for leveling the sea level.
  3. 3. The offshore wind power concrete filled steel tube single pile foundation according to claim 1, wherein the annular reinforced concrete lining layer (2) comprises a shear connection structure (21) and annular concrete (22), the periphery of the shear connection structure (21) is abutted against the inner wall of the upper pile body (13), the annular concrete (22) is coated outside the shear connection structure (21), and the annular concrete (22) extends around the horizontal circumference of the inner cavity (11) and is abutted against the inner wall of the upper pile body (13).
  4. 4. An offshore wind power concrete filled steel tube single pile foundation according to claim 3, wherein said shear connection structure (21) extends circumferentially around the level of said cavity (11) and forms a ring-like structure.
  5. 5. The offshore wind power concrete filled steel tube single pile foundation of claim 3, wherein the shear connection structure (21) is a reinforcement cage.
  6. 6. An offshore wind power concrete filled steel tube single pile foundation according to claim 2, further comprising a plurality of wings (5), wherein one side of each wing (5) is connected to the outer wall of the lower pile body (12), the other side of each wing (5) extends in a direction away from the axis of the lower pile body (12), the plurality of wings (5) are distributed around the periphery of the lower pile body (12) at intervals, and each wing (5) is used for being embedded into the seabed.
  7. 7. An offshore wind power concrete filled steel tube single pile foundation according to claim 6, wherein the wing plates (5) have a polygonal plate-like structure.
  8. 8. A construction method of an offshore wind power concrete filled steel tube single pile foundation, comprising the offshore wind power concrete filled steel tube single pile foundation according to any one of claims 1-7, characterized by comprising the following steps: Sinking the pile pipe (1) with the pre-installed shear connection structure (21) to the seabed, hammering the pile pipe until the lower pile body (12) is buried in the seabed, immersing the upper pile body (13) in water above the seabed, and exposing the top of the upper pile body (13) above a horizontal plane; Draining accumulated water in the inner cavity (11); the annular bottom template is lowered into the inner cavity (11) and is fixed on the inner wall of the upper pile body (13); The annular inner template (or the installed template) is lowered into the inner cavity (11), the bottom of the annular inner template is abutted against the inner outer edge of the annular bottom template, and the annular inner template is placed in an upward extending manner along the vertical direction so as to form a concrete pouring space among the inner wall of the upper pile body (13), the annular bottom template and the annular inner template; And pouring concrete stirring objects in the concrete pouring space until the poured concrete stirring objects and the shearing-resistant connecting structure (21) are solidified into the annular reinforced concrete lining layer (2).
  9. 9. The construction method of the offshore wind power steel pipe concrete single pile foundation according to claim 8, wherein the formwork comprises a temporary formwork or a permanent formwork, the step of pouring concrete stirring materials in the concrete pouring space until the poured concrete stirring materials and the shear connection structure (21) are solidified to form the annular reinforced concrete lining layer (2) comprises the steps of dismantling the temporary formwork after the annular reinforced concrete lining layer (2) is solidified when the temporary formwork is adopted, and retaining the permanent formwork in the inner cavity (11) when the permanent formwork is adopted.

Description

Offshore wind power steel pipe concrete single pile foundation and construction method thereof Technical Field The invention relates to the technical field of wind power generation, in particular to a concrete-filled steel tube single pile foundation for offshore wind power and a construction method thereof. Background With the global increasing demand for clean energy, offshore wind power is gradually developing to be large-capacity as an important component of renewable energy. Currently, the predominant offshore wind turbine foundation forms mainly include a mono-pile foundation and a jacket foundation. The traditional single pile foundation has the advantages of simple structure, convenience in installation, strong site adaptability, lower unit construction cost and the like, and takes the dominant role in a region with shallower water depth for a long time. However, as the capacity requirements of unit fans are increased, fan foundations need to be installed at deeper underwater locations, and the traditional single pile foundations are difficult to meet the rigidity requirements and fatigue requirements of higher standards. The jacket foundation can meet the performance requirement of the deep-open sea large megawatt fan, but has complex structure, complex installation procedure and higher overall cost. Disclosure of Invention In order to overcome the defects of the prior art, one of the purposes of the invention is to provide an offshore wind power steel pipe concrete single pile foundation and a construction method thereof, which can enable the single pile foundation to meet the rigidity requirement and the fatigue requirement of higher standards; the second purpose of the invention is to provide the offshore wind power concrete filled steel tube single pile foundation and the construction method thereof, which not only can meet the performance requirement of the deep-open sea large megawatt fan, but also reduce the manufacturing cost of the offshore wind power concrete filled steel tube single pile foundation. The invention adopts the following technical scheme that the offshore wind power steel pipe concrete single pile foundation comprises a pile pipe and an annular reinforced concrete lining layer; The pile tube comprises a lower pile body and an upper pile body which are sequentially connected along the length direction of the pile tube, wherein the lower pile body is used for being embedded into a seabed, and the upper pile body is used for being immersed into water above the seabed; the annular reinforced concrete inner liner is arranged in the inner cavity, and the outer wall of the annular reinforced concrete inner liner is connected with the inner wall of the upper pile body to jointly form a composite bearing structure. Further, the inner wall of the upper pile body is provided with a first alignment mark higher than the sea level, and the inner wall of the upper pile body is provided with a second alignment mark for leveling the sea level. Further, the annular reinforced concrete lining layer comprises a shearing connection structure and annular concrete, the periphery of the shearing connection structure is abutted to the inner wall of the upper pile body, the annular concrete is coated outside the shearing connection structure, and the annular concrete extends around the horizontal circumference of the inner cavity and is abutted to the inner wall of the upper pile body. Further, the shear connection structure extends circumferentially around the level of the lumen and forms a ring-like structure. Further, the shearing connection structure is a reinforcement cage. Further, the offshore wind power concrete filled steel tube single pile foundation further comprises a plurality of wing plates, one side of each wing plate is connected with the outer wall of the lower pile body, the other side of each wing plate extends along the direction away from the axis of the lower pile body, the plurality of wing plates are distributed around the periphery of the lower pile body at intervals, and the wing plates are used for being embedded into a seabed. Further, the wing plate is of a polygonal plate-shaped structure. A construction method of a marine wind power steel pipe concrete single pile foundation comprises the following steps: Sinking the pile pipe with the pre-installed shearing connection structure to the seabed, hammering the pile pipe until the lower pile body is buried in the seabed, immersing the upper pile body in water above the seabed, and exposing the top of the upper pile body above a horizontal plane; Draining accumulated water in the inner cavity; the annular bottom template is lowered into the inner cavity and fixed on the inner wall of the upper pile body; The annular inner template (or the installed template) is lowered into the inner cavity, the bottom of the annular inner template is abutted with the inner side outer edge of the annular bottom template, and the annular inne