JB/T 10286—2001 This standard is one of the greenhouse series standards. This series of standards includes: - greenhouse structure design load - greenhouse ventilation and cooling design specifications - facility agriculture terminology - multi-span greenhouse structure - solar greenhouse structure - temperature curtain cooling device - greenhouse heating system design specifications - greenhouse electrical wiring design specifications - greenhouse control system design specifications The first two of the above standards are national standards, and the rest are industry standards. This standard specifies the overall structural dimensions of the internal column-free steel frame solar greenhouse and the structural type, technical requirements, marking, packaging, transportation and storage of components such as the frame enclosure wall and base storage light-transmitting covering materials. This standard is applicable to steel frame solar greenhouses. This standard was first issued in June 2001. JB/T 10286-2001 Solar greenhouse structure JB/T10286-2001 Standard download decompression password: www.bzxz.net

ICS65.040.30
Machinery Industry Standard of the People's Republic of China
JB/T10286-2001
Solar greenhouse structure
Solargreenhousestructure
Published on 2001-06-22
China Machinery Industry Federation
Implementation on 2001-10-01
JB/T10286—2001
This standard is one of the greenhouse series standards formulated for the first time. This series of standards includes: 1. Greenhouse structure design load
2. Greenhouse ventilation and cooling design specifications
3. Greenhouse engineering terminology
4. Multi-span greenhouse structure
5. Sunlight greenhouse structure
6. Wet curtain cooling device
7. Greenhouse heating system design specifications
8. Greenhouse electrical wiring design specifications
9. Greenhouse control system design specifications
Among the above standards, the first two are national standards, and the rest are industry standards. This standard is a newly formulated industry standard.
This standard is proposed and managed by the National Agricultural Machinery Standardization Technical Committee. The drafting units of this standard are: Environmental Engineering Equipment Research and Development Center of China Agricultural Mechanization Research Institute and Yangling Qinchuan Water-saving Irrigation Equipment Engineering Co., Ltd.
The main drafters of this standard are: Gao Xiwen, Wan Xuesui, and Zhang Minqiang. This standard was first issued in June 2001.
1 Scope
Machinery Industry Standard of the People's Republic of China
Solar greenhouse structure
Solar greenhouse strudure
JB/T10286—2001
This standard specifies the overall structural dimensions of internal column-free steel frame solar greenhouses and the structural types, technical requirements, marking, packaging, transportation and storage of components such as the frame, enclosure walls, foundation, and light-transmitting covering materials. This standard applies to steel frame solar greenhouses. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards GB/T1804—2000
GB/T137931992
GB 502031998
GBJ7-1989
NY/T7—1984
3 Definitions
General tolerances Tolerances of linear and angular dimensions without tolerances Straight seam electric welded steel pipes
Code for construction and acceptance of masonry projects
Code for design of building foundations
Assembled steel pipe frame for agricultural plastic sheds
This standard adopts the following definitions.
3.1 Sunlight greenhouse Sunlight greenhouse A greenhouse that uses sunlight as the main energy source, generally consisting of a light-transmitting front slope, an external insulation curtain (quilt), a rear slope, a rear wall, a gable and an operating room. The basic orientation is north-south and extends east-west. The enclosure structure has the dual functions of heat preservation and heat storage. It is suitable for off-season planting of vegetables, flowers and fruits in areas with cold winters but sufficient sunlight. 3.2
Front roof angle frontroofangle
The angle between the intersection of the lighting roof and the ground on the cross section of the solar greenhouse and the line connecting the ridge and the ground plane, and its code is represented by the letter α. Angle of deviation of rear slope 3.3
The angle between the inner surface of the rear slope of the solar greenhouse and the ground plane, and its code is represented by the letter α. Span
The distance from the inner side of the rear wall of the solar greenhouse to the inner side of the front roof frame foundation, and its code is represented by the letter B. 5 Height height
The distance from the base ground of the solar greenhouse to the upper side of the ridge frame, and its code is represented by the letter H. 4 Basic requirements
4.1 Lighting
Approved by China Machinery Industry Federation on June 22, 2001, implemented on October 1, 2001
JB/T10286—2001
When building a greenhouse, the orientation and the angle of incidence of sunlight on the front roof must be selected to maximize the lighting. 4.2 Insulation
The design of the greenhouse enclosure structure must have sufficient thermal resistance and a certain degree of warmth, that is, it must have sufficient heat storage capacity. 4.3 Building structure typewwW.bzxz.Net
The optimized lighting roof angle and the optimized lighting roof shape make the solar greenhouse building structure reasonable. At the same time, it must be sturdy and durable and should be made of local materials to reduce the cost.
5 Models and specifications
The solar greenhouse model is compiled according to the following regulations: RW □-□-□
Height of solar greenhouse, m
Span of solar greenhouse, m
Code for light-transmitting covering material: S plastic film, B plate, G-glass Solar greenhouse code
Example: RWS-7-3, indicating that the light-transmitting covering material of the solar greenhouse is plastic film, with a span of 7m and a height of 3m. 5.2 Specifications of solar greenhouses
The solar greenhouse is composed of standard solar greenhouse specifications according to span B and height H, see Table 1. Table 1 Standard specifications and dimensions of solar greenhouses Span B
Orientation of greenhouse
6.1 Orientation
Facing north and south, extending from east to west. In areas with good morning light conditions, early light exposure, and not too low winter temperatures, a south-east orientation can be adopted; while in areas with low winter temperatures, late curtain opening in the morning, and late light exposure, a south-west orientation should be adopted. Whether to tilt east or west should be determined in combination with local climatic conditions. Whether to tilt east or west should not exceed 10°6.2 The distance between solar greenhouses
is shown in Figure 1. The distance between the front and rear solar greenhouses can be calculated using formula (1): hma
Where: D
JB/T10286—2001
The distance between the front and rear solar greenhouses, m; -The height of the greenhouse ridge (including the rolled-up insulation blanket), m: The tangent value of the local solar altitude angle at noon on the winter solstice: -The distance from the highest point of the greenhouse to the outside of the rear wall, m-Correction value, to avoid or reduce the influence of the front greenhouse, take 1, m. Figure 2. Distance between the front and rear solar greenhouses
7 Overall structure
7.1 Structural type
7.1.1 Front roof shape: The front roof shape includes vertical slope type, two-fold type, three-fold type and arched circular type, such as parabola, cycloid, arc and other shapes as shown in Figure 2.
7.1.2 Rear roof shape: The rear roof can be flat or slightly arched (see Figure 2). Fried roof
Front roof
Vertical slope
Rear roof
Rear roof
Front roof
Front roof
Arch round front roof
Figure 2 Shape of solar greenhouse lighting roof
Two-fold
Rear roof
Rear roof
7.1.3 Frame structure
JB/T10286—2001
The frame is the carrier of the front and rear roofs and the equipment installed on them. The frame consists of arch frames, longitudinal beams and connecting parts. The arch frame can be welded into a truss structure with steel bars or steel pipes, or can be bent directly with steel pipes or cold-bent inner-curled channel steel or cold-bent outer-curled channel steel. 7.1.3.1 All-steel arch frame structure: The load-bearing frames of the front and rear roofs are made into an integral arch frame, and the rear eaves are placed on the wall. As shown in Figure 3. Arch case
Figure 3 All-steel arch frame structure
Shield wall
7.1.3.2 Steel-reinforced concrete structure: A reinforced concrete bent column is erected on the ground foundation to form the wall column and the rear roof arch frame. The front roof steel arch frame and the rear roof arch frame are overlapped at the ridge. As shown in Figure 4. Carrying frame
Figure 4 Steel-reinforced concrete structure
Steel shoe concrete column
3 All-steel arch frame column structure: The rear eaves of the steel arch frame extend vertically downward to the ground foundation to form an integral arch frame column structure. As shown in Figure 5.
All-steel arch frame column structure
7.2 Overall structural dimensions
7.2.1Greenhouse area: 333~667m.
JB/T10286—2001
7.2.2Greenhouse span: The suitable span of a solar greenhouse is 6~9m, with a larger value in the south and a smaller value in the north, see Table 2. Table 2 Suitable spans of solar greenhouses in different latitudes North latitude
South of 35°
Greenhouse length: The greenhouse length is determined by the greenhouse area and span. 35%40°
North of 40°
The horizontal projection length b of the rear roof of a solar greenhouse (see Figure 6) varies with the span B, refer to Table 3 for selection. Table 3 Span B of solar greenhouse and horizontal projection length of rear roof b6.0
Arch spacing 0.9~1.5m, determined according to arch strength, covering material performance and local wind and snow load conditions. 7.2. 5
Front roof angle: α, as shown in Figure 6. A reasonable front roof angle should meet the following conditions: 7.2.6
α+hmin≥55°
Where: hmin
The local solar altitude angle at noon on the winter solstice.
hmin can be obtained by formula (3):
hn=66°34'-@
Where: Φ
Local geographic latitude.
According to the calculated front roof angle a, refer to Table 4 to select the appropriate span B and height H. Table 4 The corresponding relationship between the span B, height H and the front roof angle α of the solar greenhouse H
29°29
27°28
25°43
24°09
21°30°
20°23
Note: Bold black characters are standard specifications
29°15
24°18'
22°59°
21°48
30°58
29°03
27°21
2 5°49
24°27
23°12'
34°49
32°37
30°39
28°53
27°18
25°52||tt| |24°34'
36°28
34°13
32°12'
30°23
28°44
27°15
25°54
The rear slope elevation angle is shown in Figure 6. The back slope elevation angle α should be greater than the local solar altitude angle at noon on the winter solstice 5°8°7.2.7
38°03
35°45
33°41'
31°50
30°08
27°13
7.28 Back wall height: The distance between the intersection of the inner surface of the back slope and the inner surface of the back wall of the solar greenhouse and the plane in the greenhouse is called the back wall height, which is represented by h. The back wall height h (see Figure 6) can be determined according to formula (4): 5
JB/T10286—2001
h=H-btanαR
The back wall height of the solar greenhouse should generally be 1.5~2.1m. Figure 6: Front roof inclination angle αe, rear roof inclination angle a, rear roof horizontal projection length b and rear wall height h of solar greenhouse7.2.9 Floor elevation: In areas south of 45°N, the inside and outside of the greenhouse are set to the same elevation; in areas north of 45°N, the floor in the greenhouse is lowered by 0.3~0.5m.
7.2.10 The recommended chord-height ratio of the front roof of the solar greenhouse is 9:1~8:1. The comprehensive thermal resistance value of the enclosing wall and the rear roof8
The comprehensive thermal resistance value of the enclosing wall and the rear roof should reach the design minimum thermal resistance R. or above, see Table 5. Table 6 is the recommended outdoor design temperature value for different regions.
Table 5 Lower thermal resistance of solar greenhouse enclosure structure Outdoor design temperature
Harbin
Karamay
Shijiazhuang
Rear wall, gable
Lower thermal resistance Rmin
Rear roof
Outdoor design temperature t. Recommended value
Lianyungang
Urumqi
JB/T10286—2001
The thermal resistance of the same building material is determined by formula (5): R=0/2
Where: R—thermal resistance, m2·K/W:
S—material thickness, m
—material thermal conductivity, W/(m·K). The thermal resistance of the composite wall is equal to the sum of the thermal resistance of each layer that makes up the wall, that is: R-Eo/n
The thermal conductivity of commonly used building insulation materials for solar greenhouses is shown in Table 7. Table 7 Thermal conductivity of commonly used building insulation materials for solar greenhouses 1 Material
Solid clay brick wall
Asphalt glass wool felt
Glass wool board
Slag wool (loose)
Slag wool products (board, brick, pipe)
Asphalt slag wool felt
Expanded perlite powder (dry, loose)
9 Foundation
Thermal conductivity A
W/(m·K)
Q03~004
Q03-004
0.027-0.038
004-006
0035~0045
0.03-0.04
The foundation of the load-bearing wall should be a continuous foundation, as shown in Figure 7. Material
Expanded vermiculite
Asphalt vermiculite board
Cement vermiculite board
Rock wool board
Boiler slag
Polystyrene foam board
Wheat straw mud plastering
Mortar mud plastering
Thermal conductivity A
W/(m·K)
0.045-0.06
0.07-0.09
008-012
0.07-0093
When the skeleton is a steel-reinforced concrete structure or an all-steel column structure, pier foundation is allowed, as shown in Figure 8. 0. 0g
3:1 family soil
Figure 7 Continuous foundation section
Carbon embedded parts
3: 1±
Figure 8 Concrete pier foundation
JB/T10286—2001
9.3 The bottom surface of the foundation is compacted and backfilled with dry sand and Sanqi lime soil with a thickness of 200mm. 9.4 The foundation burial depth shall comply with the provisions of Chapter 4 of GBJ71989. 10 Transparent covering materials
10.1 Plastic film (S)
10.1.1 Single-layer plastic film, thickness of 0.08mm or more, light transmittance of 90% or more, service life of more than 1 year. 10.1.2 Single-layer drip-free long-life plastic film, thickness of 0.1mm or more, light transmittance of 90% or more, service life of more than 3 years. 10.1.3 Double-layer film interlayer inflation: single-layer film thickness is more than 0.1mm, average inflation thickness is 100mm, light transmittance is more than 90%, and service life is more than 3 years.
10.2 Translucent sheet (B)
10.2.1 PC board, also known as polycarbonate board, has corrugated board, double-layer hollow board and three-layer hollow board, etc. The light transmittance should be more than 80%, and the service life is more than 10 years.
10.2.2 PE board, double-layer hollow board made of polyethylene material, light transmittance should be more than 75%, and service life is more than 6 years. 10.3 Flat glass (G)
The thickness of glass used in solar greenhouse is 3~5mm, and the light transmittance is more than 90%. Flat glass is afraid of hammering and violent vibration, and is easy to break when suddenly cooled or heated. If there is no external force, it can be used for a long time. 11 Ventilation and cold protection
Natural ventilation can be in the form of vents and ventilation windows. The ventilation area in winter accounts for 3%~5% of the covered area, and the ventilation area in spring, summer and autumn accounts for 15%~25% of the covered area
11.1.1 Ventilation: Open vents at the top of the greenhouse. Ventilation vents can be in the form of manual slits, film slits, installed vents, etc. 11.1.2 Ventilation windows: When vents alone cannot meet the normal growth requirements of crops, ventilation windows can be opened to let in air from the north. The window size should be between 300mmX300mm~600mm×600mm and should be opened at the bottom of the back wall. 11.2 Cold protection
11.2.1 The thermal resistance of the ventilation window in a closed state shall not be lower than that of the back wall. 11.2.2 Cold-proof trench: In areas north of 45°N, cold-proof trenches should be set up around the outside of the greenhouse. The width of the cold-proof trench is 0.3~0.5m, the depth reaches below the frozen soil layer, and the insulation material is filled in.
11.2.3 Insulation blanket: After the daylighting roof is covered with an insulation blanket, the thermal resistance should be able to reach more than 2/3 of the total thermal resistance of the wall. 12 Engineering construction and technical requirements for parts
12.1 Engineering construction
12.1.1 For solar greenhouses with a length of no more than 50m, the parallelism between the ridge line and the reference ground is ≤20mm; for solar greenhouses with a length of more than 50m, the parallelism between the ridge line and the reference ground is ≤30mm. 12.1.2 The deviation of the arch frame spacing is ±10mm.
12.1.3 The verticality between the arch frame arch circle plane and the longitudinal axis of the greenhouse is ≤10mm. 12.1.4 The bearing capacity of the load-bearing wall shall meet the design requirements, and the construction shall comply with the relevant provisions of Chapter 4 of GB50203-1998. 12.1.5 The construction of the foundation shall comply with the relevant provisions of 2.0.1 to 2.0.9 of GB50203-1998. 12.1.6 After the steel bar arch is welded, it is allowed to use the surface anti-rust paint treatment method instead of galvanizing. Rust must be removed before painting. Each painting shall not be less than 8
JB/T10286-2001
less than two times, and there should be a complete paint layer without missing paint. 12.1.7 The test method and acceptance rules of the solar greenhouse frame shall comply with the relevant provisions of NY/T7. 12.2 Technical requirements for parts
12.2.1 All parts shall be manufactured according to the dimensions, materials and technical requirements specified in the drawings. Any dimensions without tolerance requirements in the drawings shall be implemented in accordance with the provisions of GB/1804.
12.2.2 Parts made of steel pipes and stamped parts shall comply with the provisions of 3.2, 3.3 and 3.4 of NY/T7-1984 respectively. 12.2.3 Parts made of cold-formed profiles, cold-formed profiles are rolled from galvanized steel sheets, and the thickness of galvanized steel sheets shall not be less than 1mm. 12.2.4 Welded parts shall meet the following requirements. 12.2.4.1 There shall be no false welding, desoldering, leaking welding, burns and cracks, and the welds shall be uniform, firm and fully welded. 12.2.4.2 All welding slag shall be removed and no residue shall remain. 12.2.4.3 The surface of the weld shall be flat and smooth, and shall be hot-dip galvanized after welding. After galvanizing, it shall comply with the provisions of 3.2.2.1 and 3.2.24 of NY/T7-1984.
13 Packaging, marking and instructions
13.1 The specifications and quantity of the parts of each solar greenhouse frame must comply with the product parts list, otherwise they shall not be packaged. 13.2 The large and small parts of each solar greenhouse frame shall be packaged separately. Large parts shall be bundled and small parts shall be packed. The packaging must ensure that the parts are not easily lost or damaged.
13.3 The weight of each bundle or box shall be less than 80kg, and there shall be product labels. The label content includes the manufacturer's name, product model, purchaser's unit name, contract number and full set of integrity numbers. 13.4 Each box should have a packing list. Each solar greenhouse frame should have a product manual and certificate of conformity and be placed in the first box. 13.5 When the purchaser has special packaging requirements, it should be implemented according to the agreement between the two parties. 14 Transportation and storage
14.1 Avoid contact with acids, alkalis and salts during transportation and storage. 14.2 Bundles and boxes should be stacked separately.
14.3 Bundles should be stacked in a row and should not be stacked in a staggered manner. 9
Mechanical Industry Standard
Solar Greenhouse Structure
JB/T10286-2001
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880X12301/16 Printing Sheet 3/4
4 Word Count 20000
First Edition in September 2001
First Printing in September 2001
Print Quantity 1-500
Price 1200 Yuan
2001-132
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cn98
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