CN210797617U - Pile barrel composite truss type offshore wind turbine foundation - Google Patents

Pile barrel composite truss type offshore wind turbine foundation Download PDF

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CN210797617U
CN210797617U CN201921140004.4U CN201921140004U CN210797617U CN 210797617 U CN210797617 U CN 210797617U CN 201921140004 U CN201921140004 U CN 201921140004U CN 210797617 U CN210797617 U CN 210797617U
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suction
pile
wind turbine
offshore wind
foundation
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朱嵘华
王复明
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The utility model discloses a compound truss-like offshore wind turbine basis of a pile section of thick bamboo, compound truss-like offshore wind turbine basis of a pile section of thick bamboo includes truss-like structure, a suction section of thick bamboo and pile foundation, a suction section of thick bamboo is connected with the bottom of truss-like structure, be equipped with the embedding sleeve of installation pile foundation on the suction section of thick bamboo. The insert sleeve is located inside, at the edge of or outside the suction tube. The utility model provides a compound truss-like offshore wind turbine foundation of stake section of thick bamboo can guarantee that offshore wind turbine foundation's structure has higher stability and bearing capacity, more can resist ultimate load such as typhoon, and seabed strong adaptability.

Description

Pile barrel composite truss type offshore wind turbine foundation
Technical Field
The utility model relates to an offshore wind power engineering field, in particular to pile section of thick bamboo composite truss-like offshore wind turbine foundation.
Background
Offshore wind power as a renewable energy source has been vigorously researched and popularized in various countries in the world in recent years. The negative pressure cylinder (suction cylinder) is a large-diameter cylindrical thin-wall structure, is used as an anchoring form and a foundation form, is widely applied to an ocean structure mooring system, an ocean foundation platform and an ocean fan foundation, and has the advantages of simplicity and convenience in assembly, high construction efficiency, lower cost and the like.
For example, chinese patent publication No. CN109914460A discloses a novel suction tube type wind power foundation with a combined structure suitable for shallow sea, and relates to the technical field of wind power generation. The system comprises a central pile, a suction barrel, a barrel wall, a top cover, a bin distribution plate, steel stiffening ribs, a tower barrel connecting section and studs. The suction barrel is formed by enclosing a barrel wall and a top cover, and three sub-bin plates are arranged in the barrel to form a suction barrel cavity. The section of thick bamboo wall, top cap and branch storehouse board all adopt double-deck steel sheet concrete, and the steel sheet contacts one side welding toggle pin with the concrete and is connected in order strengthening. The central pile is made of solid concrete-filled steel tube or hollow steel tube, and the pile top and the pile side are respectively and firmly connected with the top cover and the warehouse separating plate. The upper part of the top cover is provided with a tower drum connecting section, steel stiffening ribs are arranged along the annular direction, and the steel stiffening ribs are tightly connected with the top cover and the tower drum connecting section. For example, chinese patent publication No. CN109853609A discloses an offshore wind power combination foundation. The offshore wind power combined foundation comprises a jacket, a steel pipe pile, a suction tube and a steel cable. The utility model discloses a marine wind power combination basis is by the jacket, the steel-pipe pile, a suction section of thick bamboo and steel cable constitute, jacket and a suction section of thick bamboo pass through the steel cable and connect, the steel cable can exert its high tensile ability, increase the lateral rigidity on combination basis, the jacket bears vertical load, fan horizontal load and wave flow power that the jacket bore pass through the steel cable transmission and undertake for a suction section of thick bamboo jointly, because in suction section of thick bamboo dispersion embedding top layer soil, it is big with top layer soil foundation area of contact, can full play the horizontal resistance of surface soil, improve the horizontal bearing capacity of base pile, improve basic antidumping ability, reduce the pullout force that the jacket owner leg bore, thereby can reduce jacket owner leg distance and member cross-section, reduce the basis cost and the construction degree of difficulty. The suction cylinder can be sunk by adopting negative pressure, and the construction difficulty is small.
In the field of offshore wind power, three or more suction cylinders are generally connected to a truss type steel frame to form a suction cylinder type truss fan foundation. The foundation is limited by seabed geological conditions of an installation sea area, and is suitable for being installed in an area with a relatively stable geological structure, a plurality of cylinders must be ensured to sink simultaneously in the installation process, the suction cylinder foundation needs to be controlled to sink to the designed depth in the sinking process, and the structure verticality and the whole superstructure levelness need to be accurately controlled in the sinking process. And along with the increase of the depth of water, soil plug uplift or even buckling is easily formed in the cylinder, so that the suction cylinder cannot completely sink to the designed depth at the same time, and the structural levelness is difficult to ensure, which is also a difficulty in the use process of the truss-type foundation of the current suction cylinder.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a compound truss-like offshore wind turbine basis of stake section of thick bamboo can guarantee that the structure of offshore wind turbine basis has higher stability and bearing capacity, more can resist ultimate loads such as typhoon, and seabed strong adaptability.
The utility model provides a following technical scheme:
the utility model provides a compound truss-like offshore wind turbine basis of a pile section of thick bamboo, compound truss-like offshore wind turbine basis of a pile section of thick bamboo includes truss-like structure, a suction section of thick bamboo and pile foundation, a suction section of thick bamboo is connected with truss-like structure's bottom, be equipped with the embedding sleeve of installation pile foundation on the suction section of thick bamboo.
The insert sleeve is located inside, at the edge of or outside the suction tube. The two ends of the embedded sleeve are opened, and the position, the length and the cylinder diameter of the embedded sleeve are determined according to actual conditions. The whole strength of the structure is considered in the embedding position of the sleeve, the suction tube and the like are convenient to install, the sleeve is generally far away from the pile leg as far as possible, the downward extending length of the sleeve is considered from the angle of ensuring the sealing performance of the suction tube, and the lower end of the sleeve is generally higher than the lower end of the suction tube. The length of the upper end of the sleeve is convenient for the pile hammer to carry out piling construction.
And a cured grouting layer is arranged between the embedded sleeve and the pile foundation. The pile foundation can be a steel pile or other pile foundations made of appropriate materials and types. The connection of embedding sleeve and pile foundation can be strengthened through the grout blanket and fixed.
When the embedding sleeve is positioned in the suction tube and at the edge of the suction tube, a reinforcing component for supporting the suction tube and connecting the suction tube with the embedding sleeve is arranged in the suction tube. The reinforcing member is generally a reinforcing rib made of steel plate, H-section steel, or T-section steel.
The top end of the suction barrel is provided with a pump interface for connecting a suction pump or a suction pipeline. The design of the pump interface can refer to the design of a common suction barrel structure, and the position of the interface can be determined from the angles of ensuring the integral strength of the barrel body, facilitating the pumping operation of the suction barrel and the like.
The truss structure includes a jacket structure for carrying a wind turbine and a tower, the jacket including a plurality of jacket legs. The plurality of jacket legs refers to the type that the bottom of the jacket structure is connected in a three-leg, four-leg or multi-pile and multi-leg mode. The catheter frame legs correspond to the suction cylinders one to one.
The catheter holder legs are connected to the top end of the suction canister by a stiffening member. The reinforcing member is generally a reinforcing rib made of steel plate, H-section steel, or T-section steel.
The number of the conduit frame legs is at least three.
The utility model provides a construction process of pile section of thick bamboo composite truss type offshore wind turbine foundation includes following step:
(1) the truss type structure and the suction cylinder connected with the bottom of the truss type structure are hung to the seabed, the suction cylinder penetrates into the seabed after contacting the seabed until the bottom of the embedded sleeve is submerged with soil, and a closed space is formed in the suction cylinder;
(2) carrying out water pumping operation on the suction barrel through a suction pump or a suction pipeline to enable the suction barrel to sink to a specified elevation, stopping the suction pump after the specified elevation is reached, and sealing a pump connector through a cover plate or grouting measures to finish the installation of the suction barrel;
(3) after the suction tube is installed, the pile foundation is inserted into the embedded sleeve, and after pile sinking is finished, gap grouting is carried out between the pile foundation and the embedded sleeve.
In the step (2), an underwater suction pump can be adopted, the underwater suction pump is connected with the pump interface to perform water pumping operation, one or more suction pumps can be arranged at the top end of each suction barrel according to actual conditions, and a centralized control system is adopted to control the pressure of the suction pumps so as to ensure that the barrels of the suction barrels sink uniformly. An above water suction system may also be used to connect the suction line to the pump interface 6 at the top of each suction canister to operate to sink the canister to a specified elevation.
In the step (2), when the suction cylinder does not sink to a designated elevation or does not meet the structural level requirement after the suction pump is pumped by the suction pump or the suction pipeline, the pile driving hammer is used for beating the embedded sleeve to complete the sinking and leveling operation.
In step (3), the connection strength between the pile foundation and the embedded sleeve can be ensured by grouting the gap between the pile foundation and the embedded sleeve. The bearing capacity of the whole offshore wind turbine foundation can be increased due to the arrangement of the pile foundation.
The utility model provides a compound truss-like offshore wind turbine basis of a stake section of thick bamboo mainly utilizes the outside of a suction section of thick bamboo, imbeds telescopic outside, the outside of piling bar and the frictional force of the soil body and the inside and outside differential pressure of a suction section of thick bamboo to resist the external load that the structure bore during the use.
The utility model provides a truss-like fan basis of suction section of thick bamboo and pile foundation mixed pattern to a method and technology convenient to marine construction have been provided. The offshore wind turbine foundation and the construction process provided by the utility model can effectively ensure that the suction cylinder sinks to the seabed according to the designed depth; once the construction cannot be carried out to the designed depth through self weight and negative pressure due to the existence of a geological stronger or impervious stratum, the whole structure can be constructed to the designed depth through the action of the external force of the construction hammer on the embedded sleeve structure by means of the embedded sleeve; in order to improve the bearing capacity and the long-term stability of the structure, the pile foundation can be inserted into the embedded casing, and the pile foundation and the embedded casing are connected through grouting. The utility model provides a pile section of thick bamboo composite truss type offshore wind turbine basis can guarantee that foundation structure has higher stability and bearing capacity, more can resist extreme load such as typhoon, and seabed strong adaptability, and simple installation, with low costs, but advantages such as reuse have wide application prospect.
Compare with traditional suction section of thick bamboo basis and pile foundation structure, this compound truss-like basis of section of thick bamboo advantage of stake and innovation point are as follows:
1) the adaptability of the seabed is strong: the method can be used for sandy soil geology, sandy soil and clay multilayer geology, and geology with thicker soft soil covering layer and weaker bearing capacity during construction;
2) the basic reliability is high: the advantages of the traditional steel pile and the novel suction cylinder foundation are combined, and sufficient bearing capacity is provided;
3) the construction is convenient: the seabed is set up through truss structure self, does not need auxiliary platform or auxiliary structure stable truss basis.
Drawings
Fig. 1 is a schematic structural diagram of a pile-tube composite truss type offshore wind turbine foundation provided in embodiment 1;
fig. 2 is a schematic structural diagram of a suction tube and a pile foundation provided in embodiment 1;
fig. 3 is a schematic top view of a suction tube and a pile foundation provided in example 1;
fig. 4 is a schematic structural diagram of the pile-barrel composite truss type offshore wind turbine foundation provided in embodiment 2;
FIG. 5 is a schematic structural diagram of a suction tube and a pile foundation provided in embodiment 2;
FIG. 6 is a schematic top view of a suction tube and pile foundation provided in example 2;
fig. 7 is a schematic structural diagram of the pile-barrel composite truss type offshore wind turbine foundation provided in embodiment 3;
FIG. 8 is a schematic structural diagram of a suction tube and a pile foundation provided in embodiment 3;
fig. 9 is a schematic top view of a suction tube and a pile foundation provided in example 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The pile barrel composite truss type offshore wind power foundation structure provided by the embodiment is composed of two parts, namely a truss type structure 1 at the upper part and a suction barrel and pile foundation combined part at the lower part, as shown in fig. 1-3.
The truss structure 1 includes: any jacket structure that can be used to carry a fan and a tower has three jacket legs connected at the bottom of the jacket.
The structure of suction section of thick bamboo 3 and pile foundation 4 integrated section includes: a cylindrical thin-wall suction tube 2 with an opening at the lower part, wherein the top end of the suction tube 2 and the catheter frame leg are connected through a reinforcing member 7. Be equipped with the embedding sleeve 3 of installation pile foundation 4 in the suction section of thick bamboo 2, embedding sleeve 3 passes through reinforcing member 8 with a suction section of thick bamboo 2 and is connected, and the both ends opening of embedding sleeve 3, embedding telescopic position, length, section of thick bamboo footpath are confirmed according to actual conditions, and the inside of a suction section of thick bamboo 2 still is equipped with reinforcing member 8 in order to guarantee that a suction section of thick bamboo 2 itself and a suction section of thick bamboo 2 is connected with embedding sleeve 3. Pile foundation 4 accessible embedding sleeve 3 is driven into the seabed to increase foundation structure's bearing capacity, pile foundation 4 is connected through grout blanket 5 with embedding sleeve 3. The top end of the suction barrel 3 is provided with a pump interface 6 for connecting an underwater suction pump.
Example 2
The pile-barrel composite truss offshore wind power foundation provided in example 1 differs from fig. 4-6 in that an insert sleeve 3 is provided at the barrel edge of the suction barrel 2. The cylinder rim means that the suction cylinder 2 is tangent to the insertion sleeve 3.
Example 3
The pile-tube composite truss type offshore wind power foundation provided by the embodiment 1 and the fig. 7-9 are different in that the embedded sleeve 3 is arranged outside the suction tube 2, and the reinforcing member connected with the embedded sleeve 3 is not required to be arranged in the suction tube 2.
The construction process of the pile-tube composite truss type offshore wind turbine foundation provided in the embodiment 1 to 3 includes the following steps:
(1) the truss type structure and the suction cylinder connected with the bottom of the truss type structure are hung to the seabed, the suction cylinder penetrates into the seabed after contacting the seabed until the bottom of the embedded sleeve is submerged with soil, and a closed space is formed in the suction cylinder;
(2) pumping water to the suction barrel by an underwater suction pump to enable the suction barrel to sink to a specified elevation, stopping the suction pump after the suction barrel reaches the specified elevation, and sealing a pump connector by a cover plate or grouting measures to finish the installation of the suction barrel; when the suction cylinder does not sink to a specified elevation or does not meet the structural level requirement after the suction cylinder is pumped by the underwater suction pump, a pile hammer is used for beating the embedded sleeve to complete sinking and leveling operations;
(3) after the suction tube is installed, the pile foundation is inserted into the embedded sleeve, and after pile sinking is finished, gap grouting is carried out between the pile foundation and the embedded sleeve.
The above-mentioned detailed description of the technical solution and the beneficial effects of the present invention have been described in detail, it should be understood that the above is only the most preferred embodiment of the present invention, not used for limiting the present invention, any modification, supplement, equivalent replacement, etc. made within the principle scope of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The utility model provides a compound truss-like offshore wind turbine basis of a pile section of thick bamboo, its characterized in that, compound truss-like offshore wind turbine basis of a pile section of thick bamboo includes truss-like structure, a suction section of thick bamboo and pile foundation, a suction section of thick bamboo is connected with truss-like structure's bottom, be equipped with the embedding sleeve of installation pile foundation on the suction section of thick bamboo.
2. The pile-casing composite truss offshore wind turbine foundation of claim 1, wherein the embedment sleeve is located inside, at a casing rim, or outside of a suction casing.
3. The pile-barrel composite truss offshore wind turbine foundation of claim 2, wherein a cured grout blanket is disposed between the embedment sleeve and the pile foundation.
4. The pile-casing composite truss offshore wind turbine foundation of claim 2, wherein when the embedment sleeve is located within and at a casing edge of the suction casing, a reinforcement member is provided within the suction casing for supporting the suction casing and the connection of the suction casing to the embedment sleeve.
5. The pile-barrel composite truss offshore wind turbine foundation of claim 1, wherein the top end of the suction barrel is provided with a pump interface for connecting a suction pump or a suction line.
6. The pile-tubular composite truss offshore wind turbine foundation of claim 1, wherein the truss structure includes a jacket structure for carrying a wind turbine and a tower, the jacket including a plurality of jacket legs.
7. The pile-barrel composite truss offshore wind turbine foundation of claim 6, wherein the duct frame legs are connected to the top end of the suction barrel by a stiffening member.
8. The pile-barrel composite truss offshore wind turbine foundation of claim 6, wherein the number of conduit frame legs is at least three.
CN201921140004.4U 2019-07-19 2019-07-19 Pile barrel composite truss type offshore wind turbine foundation Active CN210797617U (en)

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Application Number Priority Date Filing Date Title
CN201921140004.4U CN210797617U (en) 2019-07-19 2019-07-19 Pile barrel composite truss type offshore wind turbine foundation

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Application Number Priority Date Filing Date Title
CN201921140004.4U CN210797617U (en) 2019-07-19 2019-07-19 Pile barrel composite truss type offshore wind turbine foundation

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374131A (en) * 2019-07-19 2019-10-25 浙江大学 A kind of cylinder composite truss formula offshore wind turbine foundation and its construction technology
CN113280029A (en) * 2021-05-31 2021-08-20 福建永福电力设计股份有限公司 Offshore wind power suction pile suction pump cabin cover latch structure and working method thereof
CN113417312A (en) * 2021-07-16 2021-09-21 中国电建集团华东勘测设计研究院有限公司 Fan foundation that many buckets were stood more and precast concrete cushion cap combined together

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374131A (en) * 2019-07-19 2019-10-25 浙江大学 A kind of cylinder composite truss formula offshore wind turbine foundation and its construction technology
WO2021012860A1 (en) * 2019-07-19 2021-01-28 浙江大学 Pile-bucket composite truss type offshore wind turbine foundation and construction process thereof
CN113280029A (en) * 2021-05-31 2021-08-20 福建永福电力设计股份有限公司 Offshore wind power suction pile suction pump cabin cover latch structure and working method thereof
CN113280029B (en) * 2021-05-31 2023-03-14 福建永福电力设计股份有限公司 Offshore wind power suction pile suction pump cabin cover latch structure and working method thereof
CN113417312A (en) * 2021-07-16 2021-09-21 中国电建集团华东勘测设计研究院有限公司 Fan foundation that many buckets were stood more and precast concrete cushion cap combined together

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