CN104480961B - A kind of protection against erosion construction method of offshore wind farm single-pile foundation - Google Patents

A kind of protection against erosion construction method of offshore wind farm single-pile foundation Download PDF

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Publication number
CN104480961B
CN104480961B CN201410661498.6A CN201410661498A CN104480961B CN 104480961 B CN104480961 B CN 104480961B CN 201410661498 A CN201410661498 A CN 201410661498A CN 104480961 B CN104480961 B CN 104480961B
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China
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protection
erosion
construction
layer
pile foundation
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CN104480961A (en
Inventor
张星波
郭树旺
刘励学
赵迎九
王小合
朱宏兵
郝利忠
柯逸思
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Huadian Heavy Industries Co Ltd
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Huadian Heavy Industries Co Ltd
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    • 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
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/06Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water

Abstract

The invention discloses a kind of construction method of the protection against erosion of offshore wind farm single-pile foundation, belong to marine wind electric field construction technology field.It comprises the following steps:According to single tube stake installation site, scour protection scope is determined;Protection against erosion material layer is laid in the range of scour protection;Single tube stake is installed in the protection against erosion material layer.The construction method, which solves, causes random riprap amount larger in existing construction method, rubble destroys the technical problem that single tube stake is serious, Wind turbines stability of strutting system controllability is poor.Construction especially suitable for the wind power plant under the geological conditions based on mud, silty sandy soil etc..

Description

A kind of protection against erosion construction method of offshore wind farm single-pile foundation
Technical field
The present invention relates to a kind of construction method of the protection against erosion of offshore wind farm single-pile foundation, belong to the construction skill of offshore wind farm Art field.
Background technology
With the fast development of China's economy, the whole society is increasing for the demand of electric power.Traditional power generation mode is Generated electricity using coal, and environmental pollution caused by coal generating has become whole North China, East China or even whole China and controls haze The important improvement part of engineering, so the electric power energy of selection cleaning has become letter major issue to be solved.
Wind energy has been attracted attention as cleaning, the energy that renewable, energy storage is big by vast power field researcher, so as to Open the chapter of wind-power electricity generation.In wind-power electricity generation, ocean wind-powered electricity generation is currently of greatest concern.Actual geographic feelings from China From the point of view of condition, overall offshore wind speed rich reserves, East Coastal has the exploitation extraordinary condition of wind-powered electricity generation, according to China Meteorological Administration Wind energy resources preliminary inves-tigation, greater coasting area within 5 meters to 25 meters of China water depth line, more than sea level 50 meters of height wind-powered electricity generations can install About 200,000,000 kilowatts of capacity, more than 70 meters about 500,000,000 kilowatts of installed capacities.Possesses the condition of basic scale exploitation.
Ocean wind-powered electricity generation is the higher field of a technical sophistication degree, and the complexity of offshore wind farm environment causes in addition Its technical difficulty further improves.For its environment, the environmental impact factor of ocean wind-powered electricity generation is primarily referred to as the gas such as wind, wave, stream As hydrologic condition factor.After wind power plant is built up, the hydrodynamism such as wave, stream can produce serious part to blower fan single-pile foundation Wash away, so as to influence the stability of blower fan single-pile foundation;In order to improve the protection against erosion ability of marine wind electric field and then improve its knot Structure stability, it is necessary to which protection against erosion protective treatment is carried out to marine wind electric field.
Common protection against erosion protective treatment, embody a protection at all, exactly have to accomplish first to carry out single-pile foundation It is fixed, i.e., single-pile foundation is inserted into certain depth in sea bed and carry out subsequent construction processing again after its is firm, in waiting time, by Easily liquefied in the sea bed soil of the sea bed geological conditions based on mud, silty sandy soil etc., wave, the stream in seabed can be in single-pile foundations Around wash away to form pit, as shown in figure 1, have impact on the stability of single-pile foundation.In order to be mended to the above-mentioned problem of washing away To rescue, prior art then uses the thicker overcoat based on stone of laying to fill and lead up the pit that local scour is formed, The quantities of jackstone is larger;During jackstone, rubble is more serious to the anticorrosive coat destructiveness of single-pile foundation.Also, due to The uncertainty of local scour causes the protection against erosion material thickness of laying and shape can not be it is anticipated that generally being imitated with what is carried out before construction True calculate has larger difference, causes single tube stake actual loading situation uncontrollable, have impact on the stability of strutting system of Wind turbines.
The content of the invention
Therefore, the technical problems to be solved by the invention are the construction party of the protection against erosion of existing offshore wind farm single-pile foundation Method causes random riprap amount larger, and rubble destroys the problem of single tube stake is serious, Wind turbines stability of strutting system controllability is poor, enters And offer one kind is applied to various severe geological conditions and random riprap amount is small, the high offshore wind farm single pile of supporting construction stability The protection against erosion construction method on basis.
In order to solve the above technical problems, the protection against erosion construction method of the offshore wind farm single-pile foundation of the present invention, is carried out first Sea bed structural strength strengthens design:After sea bed intensity is enough, single tube stake is installed on the sea bed.
In the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, the sea bed structural strength is strengthened design and is included in Sea bed upper berth, which is set up defences, washes away material layer.
In the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, the laying scope of the protection against erosion material layer be with Centered on single tube stake to be installed, prevention direction is 6-12 times of single tube stake diameter.
In the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, the protection against erosion material layer is included positioned at downside Loaded filter and the protective layer positioned at upside.
The thickness of the loaded filter is 300-800mm, and the thickness of the protective layer is 500-1500mm.
Preferably, the loaded filter is 5-50mm rubble or cobble, and the protective layer is 100-500mm block stone.
Preferably, the loaded filter is 5-50mm broken concrete, and the protective layer is that 100-500mm concrete is broken Block.
In the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, left when laying the protective layer installation J pipe and The installation seam of cable, after the single tube stake, J pipes and cable are installed, the filling protective layer in the installation seam.
The above-mentioned technical proposal of the present invention has advantages below compared with prior art:
(1)The protection against erosion construction method of the offshore wind farm single-pile foundation of the present invention, during with conventional mounting wind-power single-pile foundation The more loose sea bed of selection soil property carries out installation difference, and sea bed first is carried out into strengthening design first, treats sea bed intensity enough again Single tube stake is installed.When this mode can be effectively prevented from installing single tube stake, the local scour easily in the liquefaction sea bed short time, from And ensure the stability of unit supporting structure.
(2)Further, sea bed structural strength of the invention, which strengthens design and is included in sea bed upper berth and sets up defences, washes away material layer, It is determined that protection against erosion material layer is laid after scour protection scope first, protection against erosion material layer include positioned at downside loaded filter and Protective layer positioned at upside, loaded filter can prevent from permeating the soil for taking away sea bed during water outflow, so as to prevent the wave in seabed, stream Wash away, protective layer then on the one hand strengthen sea bed structural strength, on the other hand support single tube stake, meeting when single tube stake is installed There is certain gap with protective layer, and in the presence of the wave, stream in seabed, protective layer will be assembled in single tube stake, further improve The support strength of single-pile foundation.
(3)The thickness of loaded filter is 300-800mm, the thickness 500- of the protective layer in the protection against erosion material layer of the present invention 1500mm, the thickness of above-mentioned loaded filter and protective layer may insure sea bed structural strength.Simultaneously as do not have during installation single tube stake Local scour, this form of construction work can make simulation calculation, than more consistent, on the one hand improve blower fan machine with actual loading situation The stability of group supporting construction, it on the other hand can greatly save the random riprap amount of laying protection against erosion material layer.Meanwhile by In rear installation single tube stake, the anticorrosive coat of single tube stake can be avoided to be destroyed in work progress, avoid protection against erosion construction ship from hitting The potential risk on basis is present.
Brief description of the drawings
In order that present disclosure is more likely to be clearly understood, specific embodiment and combination below according to the present invention Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation using the wind-power single-pile foundation of existing construction method;
Fig. 2 is the structural representation using the wind-power single-pile foundation of the construction method of the present invention.
Reference is expressed as in figure:1- single tube stakes, 2- protective layers, 3- loaded filters.
Embodiment
Below with reference to accompanying drawing, the present invention is further elaborated using following examples.
The present invention provides a kind of protection against erosion construction method of offshore wind farm single-pile foundation, carries out sea bed strong structural strength first Change design:After sea bed intensity is enough, single tube stake is installed on the sea bed.This mode can be effectively prevented from installing single tube During stake, the local scour easily in the liquefaction sea bed short time, so that it is guaranteed that the stability of unit supporting structure.In addition, this construction Mode can make simulation calculation and actual loading situation further increase the stabilization of blower fan unit supporting structure than more consistent Property.
The mode of the structural strength of above-mentioned enhancing sea bed is not unique, preferably using laying erosion control brush material in present embodiment The mode of layer.
Specifically, in present embodiment, the protection against erosion construction method of offshore wind farm single-pile foundation, comprise the following steps:
A. according to the installation site of single tube stake 1, scour protection scope is determined;
B. protection against erosion material layer is laid successively from bottom to up in the range of scour protection;
C., single tube stake 1 is installed in the protection against erosion material layer.
Single-pile foundation structure as shown in Figure 2 is formd after above-mentioned steps, is installed again after laying protection against erosion material layer Single tube stake 1, so when installing single tube stake, because the liquescent sea bed of the presence of protection against erosion material layer also will not be by local punching Brush, so that it is guaranteed that the stability of unit supporting structure.
Preferably, in the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, scour protection scope described in step a Centered on single tube stake 1, its prevention direction is 8 times of the diameter of single tube stake 1.The surrounding generation office of single tube stake 1 can be effectively prevented from Portion is washed away.
In the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, the protection against erosion material layer is included positioned at downside Loaded filter 3 and the protective layer 2 positioned at upside.Wherein, in the present embodiment, the thickness of the loaded filter 3 is 500mm, the guarantor The thickness of sheath 2 is 1000mm.
The loaded filter 3 is 5-50mm rubble or cobble, and the protective layer 2 is 100-500mm block stone.
For environmental protection, twice laid, the loaded filter 3 can also select the broken concrete for 5-50mm, described Protective layer 2 is 100-500mm broken concrete.
In the protection against erosion construction method of above-mentioned offshore wind farm single-pile foundation, left when laying the protective layer 2 installation J pipe and The installation seam of cable, after the single tube stake 1, J pipes and cable are installed, the filling protective layer 1 in the installation seam.
In other embodiment, according to the diameter of single-pile foundation and carrying situation, the loaded filter 3 and the protective layer 2 Thickness carry out adaptability adjustment, as long as the thickness of the loaded filter 3, between 300-800mm, the thickness of the protective layer 2 is Between 500-1500mm, the prevention direction for laying the scour protection scope of protection against erosion material layer is 6-12 times of the diameter of single tube stake 1 Belong to protection scope of the present invention.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or Among changing still in the protection domain of the invention.

Claims (2)

  1. A kind of 1. protection against erosion construction method of offshore wind farm single-pile foundation, it is characterised in that:Sea bed strong structural strength is carried out first Change design:After sea bed intensity is enough, single tube stake is installed on the sea bed;The sea bed structural strength is strengthened design and is included in Sea bed upper berth, which is set up defences, washes away material layer;The protection against erosion material layer includes the loaded filter positioned at downside and the protection positioned at upside Layer;The laying scope of the protection against erosion material layer is centered on single tube stake to be installed, and prevention direction is single tube stake diameter 6-12 times;The thickness of the loaded filter is 300-800mm, the thickness 500-1500mm of the protective layer;The loaded filter is 5- 50mm rubble or cobble, the protective layer are 100-500mm block stone;Or the concrete that the loaded filter is 5-50mm Fragment, the protective layer are 100-500mm broken concrete.
  2. A kind of 2. protection against erosion construction method of offshore wind farm single-pile foundation according to claim 1, it is characterised in that:Laying The installation seam of installation J pipes and cable is left during the protective layer, after installing the single tube stake, J pipes and cable, in the installation seam The interior filling protective layer.
CN201410661498.6A 2014-11-19 2014-11-19 A kind of protection against erosion construction method of offshore wind farm single-pile foundation Active CN104480961B (en)

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CN105369834A (en) * 2015-11-06 2016-03-02 中国电建集团华东勘测设计研究院有限公司 Anti-scour sand quilt for offshore wind power large-diameter pile foundation and construction method of anti-scour sand quilt
CN105369835A (en) * 2015-12-10 2016-03-02 宁波满洋船舶有限公司 Sand quilt and offshore pile foundation anti-scouring treatment method applying sand quilt
CN106049555A (en) * 2016-08-02 2016-10-26 合肥学院 Anti-scouring device of marine large-diameter pile foundation and construction method thereof
CN109881659A (en) * 2019-03-27 2019-06-14 东南大学 A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability
CN111677017A (en) * 2020-06-08 2020-09-18 中国海洋大学 Hard-shell benthos anti-scouring structure of marine foundation and construction method

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FR2232212A5 (en) * 1973-05-29 1974-12-27 Europ Etudes
US4717286A (en) * 1982-11-10 1988-01-05 Gulf Applied Technologies, Inc. Anti-scour apparatus and method
CN101962956B (en) * 2009-07-22 2012-03-07 中交公路规划设计院有限公司 Bridge prefabricated foundation and bed-burying method thereof
CN101892673A (en) * 2010-07-01 2010-11-24 宝钢工程技术集团有限公司 Erosion protection processing method for offshore wind turbine foundation
CN201915419U (en) * 2010-12-24 2011-08-03 中国水电顾问集团华东勘测设计研究院 Single-pile foundation structure with stabilizing wings for offshore wind turbine
CN203924088U (en) * 2014-05-13 2014-11-05 浙江海洋学院 A kind of fishing bank type coastal waters wind-powered electricity generation protection against erosion pile foundation

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