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FD003-2007: Design regulations on subgrade and foundation for wind turbine generator system
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Design regulations on subgrade and foundation for wind turbine generator system
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FD 003-2007
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Basic data | Standard ID | FD 003-2007 (FD003-2007) | | Description (Translated English) | Design regulations on subgrade and foundation for wind turbine generator system | | Sector / Industry | Chinese Industry Standard | | Classification of Chinese Standard | F11 | | Classification of International Standard | 27.180 | | Word Count Estimation | 153,118 | | Date of Issue | 2007-09-07 | | Date of Implementation | 2007-09-07 | | Quoted Standard | GB 18306; GB 18451.1; GB 50007; GB 50009; GB 50010; GB 50011; GB 50021; GB; 50046; GB 50153; GB 50223; GB 50287; GBJ 146; FD 002-2007; DL/T 5082; JB/T 10300; JGJ 24; JGJ 94; JGJ 106; JTJ 275 | | Issuing agency(ies) | China Institute of Hydropower and Water Conservancy Planning and Design | | Summary | This standard specifies the basic principles and methods of wind farm wind turbine tower foundation design. Environmental conditions, , loads, structural design, foundation treatment, inspection and other testing covering of foundation engineering geological conditions. This standard applies to foundation design of new onshore wind farm wind turbine tower. Project completion and acceptance of change and has built projects (expansion), safety inspection, should refer to these standards. | FD003-2007: Design regulations on subgrade and foundation for wind turbine generator system---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Design regulations on subgrade and foundation for WTGS of wind power station
Code for foundation design of wind farm units
People 's Republic of China Electric Power Industry Standard
Water Conservancy and Water Conservancy Planning and Design Institute
Foreword
To promote the healthy and orderly development of China's wind farm project construction, according to the National Development and Reform Commission on the national
Large-scale wind farm construction work requirements, China Hydropower Engineering Advisory Group Corporation is responsible for the construction of large-scale wind farm construction technology
Management, supervision and inspection and acceptance. In recent years, China Hydroelectric Engineering Consulting Group has developed a series of wind farm projects
Management methods and the relevant technical provisions, and the preparation of the "wind farm unit foundation design requirements" and supporting software.
The preparation of this standard lasted two years, in the preparation process, has been built and in the construction of wind farms, design units, manufacturers into
Line up the field and letter research; collected domestic and foreign norms, has been built and built in the wind farm project design information; carried out
Design, and with the "Building Foundation Design Code" GB50007 and "Building Pile Technical Specifications" JGJ94 carried out on the
Than the analysis; carried out the impact of the earthquake on the foundation of the foundation and the expansion of basic design methods and other topics; to "building foundation
Basic design norms "as the basis, and draw on the construction, electricity and other industries related to the design specifications, after extensive advice and
Complex reform, and finally through a national professional review, the formation of the standard.
This standard for the first time in our preparation, in the implementation process, Greek units combined with engineering practice and experience, the views and construction
Feedback to the water conservancy and water conservancy planning and design institute. Address. Xicheng District, Beijing six shop kang North Street on the 2nd, Zip code. 100011.
This standard by the China Hydropower Engineering Advisory Group Corporation Wind Power Standardization Technical Committee proposed, centralized and responsible for the interpretation.
The standard compilation unit. water conservancy and water conservancy planning and design institute
The standard test unit. China Hydropower Advisory Group Northwest Survey and Design Institute, East China Investigation and Design Institute.
Directory
1 Scope ... 1
2 normative reference documents ... 2
3 General ... 3
4 terminology ... 4
5 Basic Provisions ... 6
6 Foundation characteristics ... 8
Classification of rock and soil
6.2 Engineering characteristics of rock and soil
7 load, load effect combination and sub - coefficient ... 15
7.1 load ... 15
7.2 Combination of load conditions and load effect ... 15
7.3 Partial coefficient ... 18
8 foundation calculation ... 19
8.1 General provisions ... 19
8.2 Calculation of foundation bearing capacity
8.3 Calculation of foundation compression
8.4 deformation calculation ... 23
8.5 Stability calculation ... 25
9 basic design ... 27
9.1 General provisions ... 27
9.2 Expand the base ... 29
9.3 Pile foundation ... 31
9.4 Rock bolt base ... 43
9.5 General construction requirements ... 44
10 foundation treatment ... 47
10.1 General requirements ... 47
10.2 rock and rock combined foundation ... 47
10.3 Compressing Filling Foundation ... 48
10.4 Karst and rock foundation ... 49
10.5 Weak Foundation ... 49
11 inspection and monitoring ... 51
11.1 inspection ... 51
11.2 monitoring ... 51
Appendix A Rock Hardness and Classification of Rock Complete ... 53
Appendix B Classification of rocky weathering zones
Appendix C Classification of rock mass structure ... 55
Appendix D Classification of Crushed Stone Fields ... 56
Appendix E shallow plate load test points ... 57
Appendix F shear strength standard values ck, φk ... 58
Appendix G Earth vibration liquefaction discrimination ... 59
Appendix H China Standard Frozen Soil Standard Chart
Appendix J additional stress coefficient α, the average additional stress coefficient α ... 62
Appendix K Limit value of the pile resistance and limit resistance table
Appendix L Consider the pile foundation subjected to horizontal loads by considering the pile, pile interaction and soil elastic resistance.
Appendix M Calculation of final settlement value of pile foundation
Provisions note... ()... 1 0 1
1 Scope
1.0.1 This standard specifies the basic principles and methods of foundation design for wind turbine wind turbine tower
Based engineering geological conditions, environmental conditions, load, structural design, foundation treatment, inspection and monitoring and so on.
1.0.2 This standard is applicable to the foundation design of the newly constructed terrestrial wind farm unit tower. Completion of the project acceptance and construction
Engineering reform (expansion), safety inspection, should refer to the implementation of this standard.
1.0.3 Wind farm unit tower foundation design in addition to this standard should be in line with the collapsible soil, permafrost,
Expansive soil and in the erosion of the environment, affected by the temperature of the foundation, should still meet the existing standards, norms.
2 normative reference documents
The terms of the following standards are the terms of this standard by reference to this standard. Where is the date of the reference standard, its
All subsequent amendments (not including corrigenda) or revisions are not applicable to this standard, however,
The parties to the agreement to study whether the latest version of these standards can be used. Those who do not mind the date of the reference standard, its latest
The version applies to this standard.
Partition map of ground motion parameters in China
GB 18451.1 Safety requirements for wind turbines
Code for design of foundation of building foundation GB 50007
Code for design of load of building structure GB 50009
Code for design of concrete structure GB 50010
Specification for Seismic Design of Buildings GB 50011
Geotechnical survey specification
Code for design of corrosion protection for industrial buildings GB 50046
Uniform Standard for Reliability Design of Engineering Structures GB 50153
Code for classification of seismic fortification for construction engineering GB 50223
Code for geological survey of hydroelectric power engineering GB 50287
GBJ 146 fly ash concrete application technical specification
Code for design of anti - frost in hydraulic structures of DL/T 5082
JB/T 10300 wind turbine design requirements
Code for Thermal Design of Civil Buildings JGJ 24
Technical specification for JGJ 94 building pile foundation
Technical specification for foundation inspection of JGJ 106 building
Technical code for concrete anti - corrosion of JTJ 275 harbor engineering
3 General
3.0.1 This standard is specially formulated for the content and depth of the foundation design of a unified wind farm unit.
3.0.2 The foundation design of the unit foundation should implement the national technical and economic policies, adhere to local conditions, protect the environment and save
The principle of the source, fully consider the characteristics of the structure of the force, so safe and applicable, economic rational, advanced technology.
3.0.3 The foundation design of this standard, using the limit state design method, the load and the relevant factor of the factor should be
Comply with the relevant provisions to ensure that the provisions of the external conditions, design conditions and load conditions, so that the foundation of the unit in the design
Years of use within 50 years of safe and normal work.
4 Terminology
4.0.1 wind farm wind power station
A power station consisting of a group of wind turbines or wind turbines. Often called a wind farm.
4.0.2 wind turbine generator unit wind turbine generator system (WTGS)
A system that converts wind kinetic energy into electrical energy.
4.0.3 foundation subgrade
To support the foundation of the soil or rock.
4.0.4 Basic foundation
The various structures of the upper structure are transmitted to the structures on the foundation.
Basic combination of 4.0.5
Carrying capacity limit state calculation, the combination of permanent and variable action.
4.0.6 accidental combination accidental combination
Carrying capacity limit state calculation, permanent action, variable action and a combination of accidental action.
4.0.7 standard combination characteristic/nominal combination
Normal use of the limit state calculation, the use of standard value load combination.
4.0.8 reference wind speed reference wind speed
Used to determine the basic extreme wind speed parameters at the WTGS level. Other climate-related design parameters can be referenced by the wind
Speed and other basic grade parameters calculated.
Extreme wind speed
The average maximum wind speed in T seconds, which may be N years (reproduction cycle N years).
GB 18451.1 used to reproduce the cycle N = 50 years and N = 1 year, the use of the time limit T = 3s.
4.0.10 Design load state design load case (DLC)
A combination of possible design states and external conditions that cause component loads.
4.0.11 Load correction safety factor k0
Taking into account the load uncertainty of the upper structure of the wind turbine tower base and the deviation of the load model and other factors
Correct the safety factor with a value of 1.35.
4.0.12 Characteristic value of subgrade bearing capacity
The pressure value corresponding to the deformation defined in the linear deformation section of the foundation soil pressure deformation curve measured by the load test is the maximum
Value is the ratio limit.
4.0.13 single pile vertical ultimate bearing capacity standard value ultimate vertical bearing capacity of a single pile
The maximum amount of a single pile corresponding to a deformation that occurs before a vertical load or a deformation that is not suitable for continued carrying
Load. It depends on the support resistance of the pile to the pile and the bearing capacity of the pile.
4.0.14 Characteristic value of the vertical bearing capacity of a single pile
Single pile
Single bearing vertical ultimate bearing capacity of the standard value divided by the safety factor after the carrying capacity value.
4.0.15 allowable subsoil deformation allowable subsoil deformation
The deformation control value determined to ensure the normal use of the building.
4.0.16 standard frost penetration
In the ground flat, bare, outside the city open space in not less than 10 years of the measured maximum frozen depth average.
4.0.17 Foundation ring example stub of tubular tower
An embedded connector for the connection of the tower to the base of the tower.
4.0.18 hub height hub height
The height of the center of the wind turbine sweeping the center of the wind turbine from the ground.
4.0.19 tower tower
The above supports the high-rise structure of wind turbines.
4.0.20 extended base spread foundation
The base of the column and the bottom plate causes the pressure to spread.
Pile foundation
By the pile in the soil and set up in the pile at the top of the base composition of the foundation.
4.0.22 rock foundation foundation rock foundation with anchor bars
In the rock foundation, relying on the rock anchor, concrete platform and rock foundation of the basis of the interaction.
Soil - rock composite subgrade
In the base of the main force within the scope of the existence of stone buds and exposed the foundation, large boulder or individual stone buds exposed to the foundation.
Foundation treatment
The measures taken to improve the strength, stiffness and stability of the foundation.
4.0.25 composite foundation composite subgrade, composite foundation
An artificial ground that carries the load together by the reinforcement formed by the base soil and part of the soil being reinforced or replaced.
5 Basic Provisions
5.0.1 According to the unit capacity of the wind farm unit, the height of the hub and the complexity of the foundation, the foundation is divided into three designs
Level, the design should be based on specific circumstances, according to Table 5.0.1 selected.
Table 5.0.1 Foundation design level
Design level stand-alone capacity, hub height and foundation type
Stand-alone capacity greater than 1.5MW
Wheel height greater than 80m
Complex geological conditions or soft soil foundation
2 between 1, 3 between the foundation of the foundation
Stand-alone capacity of less than 0.75MW
The hub height is less than 60m
Geological conditions of simple rock and soil foundation
Note. ① foundation design level according to the table indicators are divided into different levels, according to the highest level to determine;
② on the basis of a foundation, foundation conditions are better, the demonstration design level can be reduced by a level.
5.0.2 The foundation design of the unit foundation shall meet the following requirements
1 All foundation foundation of the unit shall meet the requirements of bearing capacity, deformation and stability.
2 1, 2 crew foundation foundation, should be calculated for foundation deformation.
3 3 level foundation foundation, generally do not make the deformation check, if any of the following circumstances, should still be the deformation check.
1) The bearing capacity of the foundation is less than 130 kPa or the compressive modulus is less than 8 MPa;
2) soft soil and other special soil.
5.0.3 Before and after the foundation design of the unit, the geotechnical investigation should be carried out. The contents and methods of survey should conform to the provisions of GB 50021.
5.0.4 Fan foundation type mainly has the foundation of expansion, pile foundation and rock bolt foundation, which kind of foundation should be used
According to the construction site foundation conditions and the superstructure of the wind turbine to determine the basis of the basic requirements, if necessary, need to try or technical economy
Comparison. When the foundation is soft soil or high compressive soil layer, should be preferred to use pile foundation.
5.0.5 According to the importance of the wind farm project and the foundation of the consequences (such as endangering human life safety, resulting in economic losses
And the impact of social impact, etc.), the unit infrastructure security level is divided into two levels, see Table 5.0.5.
Table 5.0.5 Unit Infrastructure Security Level
Infrastructure The basis of the importance of the foundation of the security consequences
An important foundation is very serious
Secondary general basis serious
Note. The safety level of the unit foundation should also be consistent with the safety level of the superstructure such as the unit and tower.
5.0.6 Foundation design The following calculations and calculations are required.
1 foundation bearing capacity calculation;
2 foundation under the force layer within the soft under the floor should be checked when the carrying capacity;
3 based anti-sliding stability, anti-overturning stability and other calculations;
4 foundation settlement and tilt deformation calculation;
5 basis of the crack width check;
6 Foundation (pile) internal force, reinforcement and material strength check;
7 Other calculations on basic safety (eg basic dynamic stiffness and anti-floating stability, etc.).
In the case of pile foundation, the calculation and verification shall comply with the standards, and shall comply with the regulations of GB 50010 and JGJ 94
set.
5.0.7 In view of the main load of the wind turbine, the random load of the wind load is large, and it is not easy to simulate.
In the calculation of the basis stability, the load of the upper structure to the bottom of the tower and the interface of the base ring shall be controlled by load
Safety factor (k0) corrected standard value of the load correction.
5.0.8 The fatigue strength of the material shall be in accordance with the provisions of GB 50010.
5.0.9 Respond to the manufacturer's proposed base-based and basic connection design for review.
5.0.10 Depending on the basis of the stress conditions and the upper structural requirements, depending on the requirements of the manufacturer of the wind turbine
Dynamic stiffness check.
5.0.11 Seismic fortification intensity of 9 degrees and above, or reference wind speed over 50m/s (equivalent to 50 years in a case of extreme wind
Speed over 70m/s) wind farms, the foundation design should be carried out specialized research.
5.0.12 Foundation foundation affected by flood (tide) water or typhoon should meet flood control requirements, and flood (tide) water design standards should
In line with the "wind farm project classification and design safety standards" requirement.
Foundation characteristics
Classification of geotechnical soils
6.1.1 Wind farm The foundation of the foundation rock can be divided into rock, gravel, sand, silt, clay and people
Fill and so on. According to geological causes, soil can also be divided into residual soil, slope soil, alluvial soil, alluvial soil, silt soil, frozen soil
And soot.
6.1.2 rock foundation in addition to determine the rock's geological name and weathering degree, the rock should be carried out hard, rock
Integrity and basic division of rock mass quality.
6.1.3 The hardness of the rock, the degree of rock integrity and the basic quality grade of the rock mass shall be in accordance with the table
6.1.3-1 to Table 6.1.3-3.
Table 6.1.3-1 Rock Hardness Classification
Hard rock hard rock hard rock soft rock soft rock very soft rock
Saturated uniaxial compressive strength
Table 6.1.3-2 Classification of rock mass integrity
The complete integrity of the rock mass is more complete than the complete integrity of the broken broken
Integrity index> 0.75 0.75 ~ 0.55 0.55 ~ 0.35 0.35 ~ 0.15 < 0.15
Note. The integrity index is the square of the ratio of the longitudinal velocity of the rock mass to the longitudinal wave velocity of the rock mass. When selecting the rock mass and rock mass, the velocity should be noted.
Table 6.1.3-3 Basic quality classification of rock mass
6.1.4 When the lack of saturated uniaxial compressive strength test data, according to the provisions of Appendix A, Table A.0.1 and Table A.0.2
The degree of hardness of the rock and the integrity of the rock. The degree of weathering of the rock and the division of the structural types of the rock mass may be in accordance with the provisions
Appendix B, Appendix C.
6.1.5 When the softening coefficient is equal to or less than 0.75, it should be softened rock; when the rock has a special composition, special
Structural or special properties should be defined as specific rock, such as soluble rock, expansive rock, disintegrating rock, salinized
Rock and so on.
6.1.6 Crushed earth is a soil with a particle size greater than 2 mm in excess of 50% of the total mass and can be further divided into boulders, stones, pebbles, gravel, gravel and burrs according to Table 6.1.4.
Table 6.1.6 Classification of crushed earth
Name of soil Particle shape Particle gradation
Boulders round and sub-round-based
Stones are angular
Particles with particle sizes greater than.200 mm exceed 50% of total mass
Pebble round and sub-round-based
Gravel-shaped corners
Particles with particle sizes greater than 20 mm exceed 50% of total mass
Rounded and sub-round
Hexagonal pyramid-based
Particle content greater than 2mm in diameter exceeds 50% of total mass
Note. When naming, should be based on particle size from large to small to meet the first to determine.
6.1.7 The compactness of crushed earth shall be determined according to Table 6.1.7-1 or 6.1.7-2.
Or may be qualitatively identified in accordance with the provisions of Appendix D of this Regulation.
Table 6.1.7-1 Crushed rock densities classified according to N63.5
Heavy power touch hammering number N63.5 density
Note. This table applies to gravel soil with an average particle size equal to or less than 50mm and a maximum particle size of less than 100mm.
Table 6.1.7-2 Crusty soil density according to N120 classification
Heavy power touch hammering number N120 density
Note. This table applies to the average particle size greater than 50mm, or the maximum particle size greater than 100mm gravel soil.
6.1.8 Sand is a particle with a particle size greater than 2mm and no more than 50% of the total mass and particles with a particle size greater than 0.075mm
Content of more than 50% of the total mass of soil, and according to Table 6.1.8 can be further divided into gravel, coarse sand, sand, fine sand and silt.
Table 6.1.8 Sand classification
The name of the soil particle gradation
Gravel sand particle size greater than 2mm of the total particle content of 25% to 50%
Coarse sand particle size greater than 0.5mm particle content exceeds the total mass of 50%
In the sand particle size greater than 0.25mm particle content exceeds the total mass of 50%
Fine sand particle size greater than 0.075mm particle content exceeds the total mass of 85%
Powder particle size greater than 0.075mm particle content of more than 50% of the total mass
Note. When naming, should be based on particle size from large to small to meet the first to determine.
6.1.9 The density of sand According to the standard penetration test hammering measured value N is divided into loose, slightly dense, dense and dense
And shall comply with the requirements in Table 6.1.9.
Table 6.1.9 Sand density
Standard penetration test hammering number N density
N ≤ 1...
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