This standard specifies the technical conditions for the foundation and connection parts of off-grid wind turbines. This standard applies to off-grid wind turbines with a rotor swept area of ​​less than 40 square meters. JB/T 10405-2004 Technical conditions for foundation and connection parts of off-grid wind turbines JB/T10405-2004 Standard download decompression password: www.bzxz.net

ICS 27 180
Machinery Industry Standard of the People's Republic of China
JB/T10405—2004
Off-grid wind turbine generator system
Technical condition for foundation and Hinkage of off-grid wind turbine generator system
Published on 2004-02-10
Implementation on 2004-06-01
Published by the National Development and Reform Commission of the People's Republic of ChinaForeword
2 Technical requirements
2! General technical requirements
2.3 Non-cable integral foundation and connection
24 Non-tensioned four-dimensional lattice tower foundation and connection2.5 Non-controlled equilateral triangular truss or tower foundation and connection2.5 Cable-type tower foundation and connection
Inspection and testing
Appendix A (normative) Thrust on wind: F and thrust on tower F) Appendix (normative Appendix: Classification and pressure resistance of soil environment (or Nm) JB/T10405—2004
JB.T15405—2004
The standard is Formulated for the first time, the writing format and specifications of this standard conform to the provisions of (BT1.1200 Standardization Guidelines Part 1: Standardization and Writing Rules). This standard specifically includes Appendix A and Appendix B. This standard is proposed by the China Machinery Industry Federation. This standard is the national standard for wind power resistance. The starting unit of this standard is Inner Mongolia Shifang Wind Turbine Factory. The main drafters of this standard are: Jun, Yang Zhongwen, and Yongjun. 1 Scope [3/T104052C04 Off-grid wind turbine generator set. Basic Technical conditions for foundation and connection This standard specifies the technical conditions for foundation and connection parts of off-grid wind turbines. It is suitable for off-grid wind turbines with a wind turbine rotor sweeping area of ​​less than 40m. 2 General requirements
21 General
Off-grid wind turbine support: There are two types of cable-type and cable-type support, and both support connections are made of concrete.
2.2 General technical requirements
2.1 Foundation application Concrete The concrete materials used in the installation site are as follows: "cement, concrete, the volume of the right" is "125 .5” in the area, its strength rating is C15~C20, and the maintenance technical requirements should meet the standards of the construction industry. 2.22 Foundation and central control spoon conditions: to avoid the occurrence of tilting and toppling accidents. 223 The base of the case-type scaffolding has sufficient stability to avoid accidents under wind conditions. 224 The connection between the frame and the foundation should meet the strength requirements without breaking. 2.3 Integral foundation and connection of non-tensioned tower frame 2.3.1 Case of tower foundation fixing work
As shown in Figure 1, the whole machine fixing work should be based on the requirements of 1, that is: (G:+G:3 X 412Xms
Wu:
Total force of the head tower, unit is N:2
Weight of foundation broken, unit is m:
Tilting moment of the tower, unit is,. Figure
JB/I10405—2004
Calculated by Wu (2):
Where;
M=F+If+-
The distance from the action point to the bottom of the foundation, unit is square: FThe distance from the action point to the bottom of the foundation, unit is m:The grip of the wind on the wind wheel: unit is N:The thrust of the wind on the tower, unit is V:
The calculation method of F and F, see Appendix A, which can also be obtained from the tower design book. 2.3.2 The vertical load of foundation
is calculated by the gravity G of the wall (3):
The volume of 2.3.2.2 is calculated by formula (4):
The vertical load of foundation is calculated by formula (5):
G, = 24xM*FG
The vertical load of foundation is calculated by formula (3):
The vertical load of foundation is calculated by formula (4):
G, = 24xM*FG
The vertical load of foundation is calculated by formula (5):
G, = 24xM*FG
The vertical load of foundation is calculated by formula (3):
G, = 24xM*FG
The vertical load of foundation is calculated by formula (5 ... 233.2 In the corrosive area, anti-corrosion measures shall be taken for the anchor bolts. 23.3.3 The load-bearing capacity of the anchor bolts shall be greater than the tensile force on the tower surface caused by the slow-reduced small moment Mm under the storm condition. 2.4 Cable-free quadrilateral frame foundation and connection 2.4.1 Stable working conditions for the tower foundation
The stability conditions for the tower foundation are
Industry) The technical requirements for the tower foundation shall comply with the provisions of 2.3.1: \) The dangerous working condition is the situation when the wind direction is consistent with the angle line of the tower, see network 2. In this case, the total operating condition of the machine is full of formula (6): tEL-Gs+FA312XM
In the middle:
The force on the special foundation, the unit is:
The center of the foundation is replaced, the unit is.
2.4.2 Foundation weight
2.4.2.1 Gravity of each foundation block <Calculate by formula (7): -
2.4.2.2 Volume of each foundation block V (Calculated by formula 8) Figure 2
2.4.2.3 Area of ​​bottom of foundation block 5 Calculated by formula (91 Construction F
Local finance bolt technology requirements
2.4.3.1 Tensile strength shall meet the requirements of formula (10): G
The tensile strength of a screw, in N:
The tensile strength of the screw material, in MPa
The diameter of the bolt , unit is III.
243.2 Other requirements shall comply with the provisions of 7.33: 2.5 Equilateral triangle truss tower foundation and connection without cable 2.5.1 Stable working conditions of tower foundation
The working conditions of the tower foundation are:
a! The technical requirements of the integral type foundation shall comply with the general room IA/T10405-2004
5) 3 The dangerous working conditions of the independent foundation (see Figure 3) are the conditions when the wind direction is vertical to the center of the two foundations. The requirements of the mechanical stability are as follows: 1(+G,) sin60*.4,:.2×M.
Non-: The equal sign in the formula is the same as formula (6)
2.5.2 Basic parameters
2.5.2.1 Whole block weight G mountain formula (12) Section 1.2× Mmx-G,/3 sin60°*4
sin 50 4
TR/T1040520D4
2522 Each flow foundation body formula (8) calculation
252.3 Each forest burning bottom area mountain formula 13
Winter 5.3 Technical requirements for the pool bolt drum
253.1 The actual capacity should meet the requirements of formula (!1): =g
25.3.2 Other technical requirements are in accordance with the numerical determination of 2.3.3. 2.6 Cable-stayed tower foundation and connection 2.6.1 The area of ​​the base of the potential center should be the sum of the gravity of the machine G, the mutual force of the foundation and the component force under the maximum double volume of the cable required by its single area, and the pressure on the soil on the foundation (see 4,: G +G, +T
T calculated by formula: 16) The gravity of the ground foundation is calculated by formula (17): 2.G.2
2.6.3 The tension force is calculated by formula (18): e
In the formula:
Fx is the maximum wind thrust on the wind wheel. The calculation method is shown in Appendix A: The maximum wind thrust on the tower frame is calculated in Appendix A: F
is based on the wheel center: The unit is: www.bzxz.net
——tower channel height, single transmission is forward;
4: —The distance between the seven ends of the tower frame tension system and the foundation The height of the upper plane is in m. The unit is m. The height of the upper plane is between the ground and the light. 2.6.4 The heat resistance of the foundation should be greater than 1.2. According to the inspection rules, the foundation and the connecting parts of the group meet the requirements of this standard, fT10405—2204.-(17) JB/T10405—2004 (Normative annex) The force of Cui Lan on the wind wheel, the thrust F1% on the additional frame and the relationship between F and the use of the additional frame are shown in Figure A.1. Fig. 1
Thrust of wind on wind rotor (A.1) Calculation: FaG. .
In the formula:
center -, thrust coefficient, wind speed, wind speed at 1 center height of 30m = 42~/ The projected area of ​​a wind blade on the rotating plane, unit =: Number of wind rotor blades
Safety factor: Take S=1.5:
Air density, take o=1335kg/m2.
The thrust of wind on the tower is calculated according to formula (A.2): A.2
Wherein;
Maximum wind speed (rm) For off-grid units, the general tower height is H30m, so take 42m/s: Aerodynamic coefficient, for cylindrical closed tower = 0.7, for truss tower -1.4: (A.1)
Horizontal projection area of ​​the tower, unit is, for closed tower, A, that is, the total area of ​​the tower wheel: For truss tower, 30% of the tower wheel enclosed area is used to calculate this, and the reference point is set as 12 points of the tower height. Record
(Normative record)
Classification and pressure resistance of foundation soil fill (Pu/n: The classification and pressure resistance of foundation soil fill are given in B.1
Name
Stone Cheng+Xi
Long Xingshi block (Chenghua clay)
Ou Tuqin (Sand Music)
Colored Master Bag: Coarse Foundation"
Quality soil! Ten stir-fry?
Powder fine change main environment
Powder fine sand soil
Powder fine sand city
Environment transfer certificate
Pebble sand ring cavity platform state
Glued rock five
More than 2mrl for 50%
More than 0.5mm for overdryness%
More than 0.25m for over T5%
Downstate
Very south state
Moisture content and state
Dry state
Certification status
JU/T10495-2094
3.5 ~·5.5
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