CN111764394A - Installation method of cylindrical foundation - Google Patents

Installation method of cylindrical foundation Download PDF

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Publication number
CN111764394A
CN111764394A CN202010643647.1A CN202010643647A CN111764394A CN 111764394 A CN111764394 A CN 111764394A CN 202010643647 A CN202010643647 A CN 202010643647A CN 111764394 A CN111764394 A CN 111764394A
Authority
CN
China
Prior art keywords
semi
foundation
submersible
cylindrical
cylindrical foundation
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202010643647.1A
Other languages
Chinese (zh)
Inventor
张健翔
赵迎九
孔德煌
闵巧玲
贺广零
陈建征
王宗尧
郭小亮
王小合
袁新勇
逯鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huadian Heavy Industries Co Ltd
Original Assignee
Huadian Heavy Industries Co Ltd
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 Huadian Heavy Industries Co Ltd filed Critical Huadian Heavy Industries Co Ltd
Priority to CN202010643647.1A priority Critical patent/CN111764394A/en
Publication of CN111764394A publication Critical patent/CN111764394A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/08Sinking workpieces into water or soil inasmuch as not provided for elsewhere
    • 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
    • E02D27/32Foundations for special purposes
    • E02D27/52Submerged foundations, i.e. submerged in open water
    • 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
    • F03D13/10Assembly of wind motors; Arrangements for erecting wind motors
    • 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
    • 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
    • F03D13/25Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • 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
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • 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
    • Y02E10/727Offshore wind turbines

Abstract

The invention relates to the technical field of offshore wind power operation, in particular to a method for installing a cylindrical foundation, which comprises the following steps: transporting the cylindrical foundation to a position to be installed by the semi-submersible ship; submerging the semi-submersible ship to a first position, and closing valves of all barrel cabins of the barrel-shaped foundation when the semi-submersible ship is located at the first position; the semi-submersible ship continues to submerge to a second position, when the semi-submersible ship is located at the second position, the cylindrical foundation floats on the water surface, and the semi-submersible ship is separated from the cylindrical foundation; the semi-submersible vessel moves away from the drum-type foundation. Compared with the prior art that the large-scale floating crane hoists the cylindrical foundation to enable the cylindrical foundation to be launched, the construction and installation cost is greatly saved, and because the operation flow is simple, the construction procedures are few, the safety and the reliability are higher, and meanwhile, the semi-submersible ship which is common in the market is directly utilized, the cost is lower, and the economy is high.

Description

Installation method of cylindrical foundation
Technical Field
The invention relates to the technical field of offshore wind power operation, in particular to a method for installing a cylindrical foundation.
Background
At the present stage, the development and construction of domestic offshore wind power gradually enters a motorway, and the construction of offshore wind power begins to be developed vigorously in Fujian, Jiangsu, Guangdong, Zhejiang and Shandong provinces, and all the provinces have the problem that part of offshore wind power projects need to face shallow water depth or extremely shallow water depth (the average water depth is less than 3 m). Meanwhile, the problems that the soil covering layer is shallow and the rock stratum exists at the lower part of the geology in areas such as Fujian and the like are solved, and the most suitable foundation form for the geology with the rock stratum at the lower part of the Fujian is a single-cylinder foundation at present, because the cylinder skirt of the cylinder foundation is shallow in mud entering and is not influenced by the rock stratum at the lower part. And the cylindrical foundation can float on the water surface, and can be transported to the machine position by floating in a shallow water area. At present, the cylindrical foundations are mostly transported on barges as large-scale structural members. The transportation scheme is mature and stable, but after the transportation is carried to the site, the cylindrical foundation needs to be hoisted into water by adopting the large-scale floating crane, the weight of the cylindrical foundation is about 2000-4000 t, and the hoisting cost of the large-scale floating crane is higher, so the installation cost of the cylindrical foundation is higher.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of high installation cost of the cylindrical foundation in the prior art, and to provide a cylindrical foundation installation method which can save the installation cost.
In order to solve the technical problem, the invention provides a method for mounting a cylindrical foundation, which comprises the following steps:
transporting the cylindrical foundation to a position to be installed by the semi-submersible ship;
submerging the semi-submersible ship to a first position, and closing valves of all barrel cabins of the barrel-shaped foundation when the semi-submersible ship is located at the first position;
the semi-submersible ship continues to submerge to a second position, when the semi-submersible ship is located at the second position, the cylindrical foundation floats on the water surface, and the semi-submersible ship is separated from the cylindrical foundation;
the semi-submersible vessel moves away from the drum-type foundation.
Before the step of submerging the semi-submersible ship to the first position, an air compressor, a drain pipe and an exhaust pipe are connected with the cylindrical foundation, and valves of all cylindrical cabins of the cylindrical foundation are opened.
And when the semi-submersible ship is located at the first position, closing the valves of all the barrel cabins of the barrel-shaped foundation.
And when the semi-submersible ship is located at the second position, leveling the cylindrical foundation.
When the semi-submersible ship is submerged to a first position, the height from the water surface to the bottom of the cylindrical foundation is called water seal height, and the water seal height is calculated according to parameters of wind speed (v), wave height (H), wave period (T) and ocean current flow speed by using a three-dimensional potential flow theory.
The water seal height is calculated by combining three-dimensional potential flow theory frequency domain calculation and time domain calculation, the maximum inclination angle of the cylindrical foundation under the action of wind waves is calculated, safety allowance is calculated on the basis of the inclination angle, and the first position is calculated according to the water seal height.
When the semi-submersible ship is located at the second position, the distance between the semi-submersible ship and the cylindrical foundation is h, and h is larger than or equal to 1m and smaller than or equal to 2 m.
After the semi-submersible vessel is submerged to a second position, the semi-submersible vessel moves transversely away from the cylindrical foundation.
The technical scheme of the invention has the following advantages:
1. the method for installing the cylindrical foundation provided by the invention has the advantages that the cylindrical foundation is transported to a position to be installed by the semi-submersible ship, then the cylindrical foundation and the semi-submersible ship are launched together by utilizing the semi-submersible characteristic of the semi-submersible ship, the semi-submersible ship is continuously submerged and separated from the cylindrical foundation, the cylindrical foundation floats in seawater by itself, compared with the method that the cylindrical foundation is launched by hoisting by a large-scale floating crane in the prior art, the construction and installation cost is greatly saved, in addition, the operation flow is simple, the construction process is few, the safety and the reliability are higher, meanwhile, the common semi-submersible ship in the market is directly utilized, the cost is lower, and the economical efficiency is high.
2. According to the installation method of the cylindrical foundation, before the step of submerging the semi-submersible ship to the first position, an air compressor, a drain pipe and an exhaust pipe are connected with the cylindrical foundation, valves of all cylindrical cabins of the cylindrical foundation are opened, and water continuously enters the cylindrical foundation through the valves in the process of submerging the semi-submersible ship to the first position, so that the cylindrical foundation is submerged along with the semi-submersible ship at the same time.
3. According to the installation method of the cylindrical foundation provided by the invention, when the semi-submersible ship is positioned at the first position, the valves of the cylindrical cabins of the cylindrical foundation are closed, so that the cabins in the cylindrical foundation are in a closed state, and at the moment, a part of air is stored at the upper parts of the cylindrical cabins of the cylindrical foundation for providing buoyancy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a transportation step in a drum type foundation mounting method provided in an embodiment of the present invention;
FIG. 2 is a schematic view of a semi-submersible vessel submerged to a first position;
FIG. 3 is a schematic view of the semi-submersible vessel submerged to a second position.
Description of reference numerals:
1-a semi-submersible vessel; 2-cylinder type foundation.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a specific implementation mode of the installation method of the cylindrical foundation, the installation method is mainly used for transporting and installing the cylindrical foundation to a region with shallow water depth or even extremely shallow water depth, the most suitable foundation form is a single cylindrical foundation for geological conditions with rock formations at the lower part of Fujian, because the cylindrical skirt of the cylindrical foundation is shallow in mud and is not influenced by the rock formations at the lower part, the cylindrical foundation can float on the water surface, and the cylindrical foundation can be transported to the machine position by floating in the shallow water region. As shown in fig. 1 to 3, the mounting method includes the steps of:
a transportation step: the semi-submersible ship transports the cylindrical foundation to a position to be installed, the semi-submersible ship used in the step is a common semi-submersible ship on the market, the installation position is a position where the cylindrical foundation needs to be installed, and after the semi-submersible ship transports the cylindrical foundation to the position to be installed, the semi-submersible ship is anchored and located.
A first stage of diving step: the semi-submersible ship is submerged to a first position, when the semi-submersible ship is located at the first position, all barrel cabin valves of the barrel-shaped foundation are closed, and all barrel cabin valves are located on the top of the barrel.
Before the step, an air compressor, a drain pipe and an exhaust pipe are connected with the cylindrical foundation, the drain pipe, a drain valve of the exhaust pipe and an exhaust valve are all in a closed state, and valves of all cylindrical cabins of the cylindrical foundation are opened. In the process that the semi-submersible ship submerges to the first position, water continuously enters the interior of the cylindrical foundation through the valves of the cylindrical cabins of the cylindrical foundation, and therefore the cylindrical foundation is submerged along with the semi-submersible ship. When the cylindrical foundation is submerged to the first position, the height from the inner water surface of the cylindrical foundation to the bottom of the cylindrical foundation is called water seal height.
In one embodiment, the seal height is calculated from the parameters wind speed (v), wave height (H) and wave period (T) and sea current flow velocity, using three-dimensional potential flow theory. Specifically, software moses can be adopted, parameters such as wind speed (v), wave height (H), wave period (T) and ocean current flow velocity are input into the software, the algorithm of the software is a three-dimensional potential flow theory, and the water seal height can be directly calculated.
Under the action of sea area wind, wave and flow, an inclination angle is formed between the cylindrical foundation and a vertical line, so that the maximum inclination angle of the cylindrical foundation under the action of the sea area wind, wave and flow needs to be calculated, and a certain safety margin is reserved after calculation to determine the height of the water seal in the cylindrical foundation. Therefore, in the embodiment, the water seal height is calculated by combining the frequency domain calculation and the time domain calculation of the three-dimensional potential flow theory, the maximum inclination angle of the cylindrical foundation under the action of the wind waves is calculated, and a certain safety margin is added on the basis of the inclination angle to obtain the water seal height. The first position is calculated according to the water seal height, specifically, after the water seal height is calculated, the time required for entering can be determined according to the speed of water flow entering the cylindrical foundation, and then the first position is determined according to the submerging speed.
After the water seal height is calculated, the height of the water level in the cylindrical foundation can be monitored through the liquid level sensor, and the time required to enter can be determined according to the speed of water flow entering the cylindrical foundation.
When the semi-submersible ship is located at the first position, the valves of the cylindrical cabins of the cylindrical foundation are closed, so that the cabins inside the cylindrical foundation are in a sealed state, at the moment, a part of air is stored at the upper parts of the cylindrical cabins of the cylindrical foundation, and the air seals the water in the cylindrical foundation and is used for providing buoyancy. At this time, the height of the air in the upper part of each barrel chamber of the barrel type foundation is about 1.5 m.
Two-stage diving step: and the semi-submersible ship continues to submerge to a second position, when the semi-submersible ship is positioned at the second position, the cylindrical foundation floats in water, and the semi-submersible ship is separated from the cylindrical foundation. When the semi-submersible ship is located at the second position, all the cylinder cabins of the cylinder foundation are connected with an air compressor, the air pressure of all the cylinder cabins is closely monitored in the self-floating process of the cylinder foundation, air is supplied at any time, the air pressure of all the cylinder cabins is guaranteed to be stable, and the cylinder foundation is leveled.
In the step, when the semi-submersible ship is located at the second position, the distance between the semi-submersible ship and the cylindrical foundation is h, and h is larger than or equal to 1m and smaller than or equal to 2 m. By the operation, the semi-submersible ship does not need to be submerged deeply, and meanwhile, when the semi-submersible ship is moved, the interference on the cylindrical foundation is avoided, and the operation is convenient. In other alternative embodiments, the semi-submersible vessel may be less than 1m, or more than 2m from the spar type foundation when the semi-submersible vessel is in the second position.
A driving-off step: the semi-submersible vessel moves away from the drum-type foundation. Specifically, in this step, after the semi-submersible vessel is submerged to the second position, the semi-submersible vessel is moved laterally away from the tubular foundation. The transverse moving semi-submersible ship can not cause interference to the cylindrical foundation.
According to the installation method of the cylindrical foundation, the cylindrical foundation is transported to the position to be installed by the semi-submersible ship, then the semi-submersible ship is used for launching the cylindrical foundation and the semi-submersible ship together, the semi-submersible ship continues to dive and is separated from the cylindrical foundation, the cylindrical foundation floats in seawater automatically, compared with the method that a large-scale floating crane is used for hoisting the cylindrical foundation to launch in the prior art, the construction and installation cost is greatly saved, and due to the fact that the operation process is simple, the construction process is few, the safety and the reliability are high, meanwhile, the common semi-submersible ship in the market is directly used, the cost is low, and the economy is high.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (8)

1. A method for installing a cylindrical foundation is characterized by comprising the following steps:
transporting the cylindrical foundation to a position to be installed by the semi-submersible ship;
submerging the semi-submersible ship to a first position, and closing valves of all barrel cabins of the barrel-shaped foundation when the semi-submersible ship is located at the first position;
the semi-submersible ship continues to submerge to a second position, when the semi-submersible ship is located at the second position, the cylindrical foundation floats on the water surface, and the semi-submersible ship is separated from the cylindrical foundation;
the semi-submersible vessel moves away from the drum-type foundation.
2. The method of installing a tubular foundation as claimed in claim 1, wherein prior to the step of submerging the semi-submersible vessel to the first position, an air compressor, a drain pipe, and an exhaust pipe are connected to the tubular foundation, and valves are opened for each of the tubular compartments of the tubular foundation.
3. A method of installing a foundation of the type described in claim 2, wherein the valves of the cabins of the foundation of the type are closed when the semi-submersible is in the first position.
4. A method of installing a drum based foundation according to claim 3 wherein the drum based foundation is leveled when the semi-submersible vessel is in the second position.
5. A method for installing a cylindrical foundation according to any one of claims 1-4, wherein the height from the water surface in the cylindrical foundation to the bottom of the cylindrical foundation when the semi-submersible vessel is submerged to the first position is called the water seal height, and the water seal height is calculated according to parameters of wind speed (v), wave height (H) and wave period (T) and current flow velocity by using a three-dimensional potential flow theory.
6. The installation method of the cylindrical foundation as claimed in claim 5, wherein the water seal height is calculated by combining frequency domain calculation and time domain calculation of the three-dimensional potential flow theory, the maximum inclination angle of the cylindrical foundation under the action of wind and waves is calculated, a safety margin is calculated on the basis of the inclination angle, and the first position is calculated according to the water seal height.
7. A method of installing a tubular foundation according to any one of claims 1 to 4 wherein the semi-submersible vessel is at a distance h from the tubular foundation when the semi-submersible vessel is in the second position, 1m ≦ h ≦ 2 m.
8. A method of installing a tubular foundation according to claim 7 wherein the semi-submersible vessel is moved laterally away from the tubular foundation after the semi-submersible vessel is submerged to the second position.
CN202010643647.1A 2020-07-06 2020-07-06 Installation method of cylindrical foundation Pending CN111764394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010643647.1A CN111764394A (en) 2020-07-06 2020-07-06 Installation method of cylindrical foundation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010643647.1A CN111764394A (en) 2020-07-06 2020-07-06 Installation method of cylindrical foundation

Publications (1)

Publication Number Publication Date
CN111764394A true CN111764394A (en) 2020-10-13

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