CN113774949B - Shallow soil layer region photovoltaic support prefabricated barrel-shaped foundation and design method - Google Patents
Shallow soil layer region photovoltaic support prefabricated barrel-shaped foundation and design method Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
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- 238000010276 construction Methods 0.000 abstract description 13
- 238000009417 prefabrication Methods 0.000 abstract description 4
- 238000010923 batch production Methods 0.000 abstract 1
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- 230000035515 penetration Effects 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000000275 quality assurance Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
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- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a prefabricated barrel-shaped foundation of a photovoltaic bracket in a shallow soil layer area and a design method thereof, wherein the prefabricated barrel-shaped foundation comprises a barrel wall and a barrel top plate, and the barrel wall is arranged below the barrel top plate; steel bars are arranged in the barrel wall and the barrel top plate; the embedded bolts and the ventilation holes are arranged in the barrel top plate, the thread sections of the embedded bolts are higher than the upper surface of the barrel top plate, and the embedded bolts are connected with the photovoltaic bracket to fix the photovoltaic bracket; a boot plate is arranged below the barrel wall; the invention provides the anti-pulling, anti-compression and horizontal bearing capacity through the interaction of the barrel-shaped foundation and foundation soil; the foundation is guaranteed to have enough bearing capacity, and the cost of foundation engineering is reduced; through factory prefabrication standardized batch production, the quality of the foundation is improved, the construction period is shortened, and the method is very suitable for photovoltaic power station engineering in shallow soil areas.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering and foundation, in particular to a shallow soil layer region photovoltaic bracket prefabricated barrel-shaped foundation and a design method.
Background
The photovoltaic power generation technology is an important component of new energy power generation technology, and is an important energy engineering technology for realizing 3060 carbon peak reaching and carbon neutralization targets in China. The principle is that the photovoltaic effect of the semiconductor interface is utilized to directly convert light energy into electric energy. The photovoltaic support is a structure for supporting the solar photovoltaic power generation element, and the foundation of the photovoltaic support is required to have good bearing characteristics and is rapid and convenient to construct.
Photovoltaic power station engineering with shallow soil layers (photovoltaic power station engineering of sites such as ash fields, landfill, thin-coverage bedrock and the like), because the covering soil layers are thin (0.5-1 m), the lower part of the covering soil layers cannot be penetrated (geomembranes) or are not easy to penetrate (rocks), the traditional precast pile foundation cannot have enough embedding depth, and cannot bear the load transmitted by the photovoltaic bracket; in addition, the conventional cast-in-situ shallow foundation is required to ensure the stability of the foundation against slippage and overturning, so that the dead weight of the foundation is often required to be large, the engineering cost is obviously increased, and the construction period of cast-in-situ operation and the environmental influence are greatly increased; therefore, the two basic forms have larger limitation in photovoltaic power station engineering of shallow soil layer areas.
Disclosure of Invention
The invention aims at: aiming at the problems that the traditional precast pile foundation at present does not have enough embedding depth, cannot bear the load transmitted by a photovoltaic support and a cast-in-situ shallow foundation, often needs larger foundation dead weight, has obvious increase of engineering cost and greatly increases the construction period of cast-in-situ operation and environmental influence, the invention provides a precast barrel-shaped foundation of the photovoltaic support in a shallow soil layer area and a design method thereof, and solves the problems.
The technical scheme of the invention is as follows:
The utility model provides a shallow soil layer district photovoltaic support prefabricates barrel foundation, includes barrel foundation, barrel foundation is the barrel foundation of a hollow prefabricated reinforced concrete, through adopting this kind of structure of barrel, under less concrete use amount, enlarges foundation and soil area of contact, guarantees that the foundation has sufficient bearing capacity.
The barrel-shaped foundation specifically comprises a barrel wall and a barrel top plate, wherein the barrel wall is arranged below the barrel top plate; the barrel wall and the barrel top plate are internally provided with reinforcing steel bars for reinforcement, and preferably, the barrel-shaped foundation is stressed mainly by the whole stress, the foundation reinforcing steel bars are structural reinforcing steel bars, the suggested barrel top plate reinforcing steel bars are phi 10, and the suggested side wall reinforcing steel bars are phi 12.
The barrel top plate is internally provided with an embedded bolt and an air hole, the threaded section of the embedded bolt is higher than the upper surface of the barrel top plate, and the embedded bolt is connected with the photovoltaic bracket to realize the fixation of the photovoltaic bracket; a boot plate is arranged below the barrel wall; the boot plate can be arranged to further ensure smooth pressing down during construction.
Integrally forming the barrel-shaped foundation; the outer diameter of the barrel-shaped foundation is 400-600mm, the concrete grade is not lower than C40, and the steel bar grade is not lower than HRB400; the thickness of the barrel top plate is 150-250mm, and is mainly determined according to the anchoring length of the embedded bolt, when the engineering wind load is large, the large thickness is considered to increase the dead weight to resist the pulling-up force, so that the installation condition of the embedded bolt is met; the thickness of the barrel wall is 80-120mm, and the barrel wall is mainly confirmed according to the corrosion characteristics of shallow soil, so that the barrel wall is ensured to have enough durability; the diameter of the ventilation holes is 50-80 mm; the boot plate is an embedded steel plate with the thickness of 8-12mm and is obliquely arranged below the barrel wall at 45 degrees; the embedded bolt is a U-shaped bolt, the diameter of the embedded bolt is between 10 and 16mm, and the total length of the embedded bolt is between 190 and 260 mm.
A design method of a photovoltaic support prefabricated barrel-shaped foundation in a shallow soil layer area comprises the following steps:
a) Determining an available maximum depth of the barrel foundation;
b) Obtaining an upward pulling force standard value T, a horizontal force standard value V and a downward pressure standard value P which act on a barrel foundation;
c) According to the available maximum depth of the barrel-shaped foundation and the total load to be applied to the barrel-shaped foundation, primarily selecting the size of the barrel-shaped foundation and determining the soil penetration depth of the barrel-shaped foundation;
d) According to the primary selected barrel-shaped basic size, calculating the pulling-resistant bearing capacity Ta, the horizontal bearing capacity Va and the compressive bearing capacity Pa of the barrel-shaped basic;
e) Checking calculation is carried out;
f) If the checking calculation is not qualified, adjusting the basic size of the barrel shape, and then checking the calculation again until the bearing capacity requirement is met;
g) And after the inspection is qualified, the size design of the barrel-shaped foundation is completed.
Further, the detailed steps of step a are: according to the earlier-stage site data, the shallow soil layer thickness (namely the upper abdomen soil layer thickness of geomembranes such as ash fields, refuse landfills and the like or the surface soil layer thickness of bedrock) is obtained; the shallow soil layer thickness is the maximum usable depth of the barrel-shaped foundation.
Further, the detailed steps of step b are: according to the multiple load, the upper support structure is calculated and analyzed to obtain an upward pulling force standard value T, a horizontal force standard value V and a downward pressure standard value P which act on the barrel-shaped foundation.
Further, the multiple loads comprise engineering wind loads, earthquake actions, dead weight loads of the photovoltaic bracket and the like.
Further, the detailed steps of step d are: calculating the pulling-resistant bearing capacity Ta of the barrel-shaped foundation according to the inner and outer friction resistance of the barrel-shaped foundation and the self weight of the foundation; according to the soil pressure of the active and passive areas of the barrel-shaped foundation, calculating the horizontal bearing capacity Va of the barrel-shaped foundation; and calculating the compression bearing capacity Pa of the barrel-shaped foundation according to the external friction resistance and the end resistance of the barrel-shaped foundation.
Further, the detailed steps of step e are: comparing the magnitude of the pulling-resistant bearing capacity Ta with the magnitude of the pulling-up force standard value T; comparing the magnitude of the horizontal bearing capacity Va and the horizontal force standard value V; and comparing the compressive bearing capacity Pa with a lower pressure standard value P.
Further, the checking qualification in the step g means: t is less than or equal to Ta, V is less than or equal to Va and P is less than or equal to Pa; through the method, after the barrel-shaped foundation is prefabricated in a factory, the barrel-shaped foundation is transported to an engineering site, and then the vertical dimension design of the barrel-shaped foundation is completed to a design position through a static press, so that the barrel-shaped foundation is fixed in a shallow soil layer; the construction process is very convenient, the construction is quick, and the production cost is low; the design position considers the surface soil characteristics, the soil penetration depth is not less than 300mm, and the soil penetration depth is more than 400 mm.
The method fully utilizes the self characteristics of the shallow soil layer, and increases the pulling-resistant bearing capacity of the foundation through the friction action of the inner side wall and the outer side wall of the barrel-shaped foundation and soil; the compression resistance bearing capacity of the foundation is increased through the self weight of the barrel-shaped foundation, the friction effect of the outer side of the barrel wall and soil and the pressure bearing capacity of the soil at the bottom of the barrel foundation; the horizontal force bearing capacity is improved through the mutual extrusion action of the enough barrel-shaped base side wall and the peripheral soil; the foundation is guaranteed to have enough bearing capacity, and the cost of foundation engineering is reduced; the quality assurance of the foundation is improved in a prefabrication mode, the construction period is shortened, and the method is very suitable for shallow soil layer photovoltaic power station engineering.
Compared with the prior art, the invention has the beneficial effects that:
1. A shallow soil layer area photovoltaic support prefabricated barrel-shaped foundation and a design method thereof fully utilize the characteristics of the shallow soil layer, and increase the pulling-resistant bearing capacity of the foundation through the friction action of the inner and outer side walls of the barrel-shaped foundation and soil; the compression resistance bearing capacity of the foundation is increased through the self weight of the barrel-shaped foundation, the friction effect of the outer side of the barrel wall and soil and the pressure bearing capacity of the soil at the bottom of the barrel foundation; the horizontal force bearing capacity is improved through the mutual extrusion action of the enough barrel-shaped base side wall and the peripheral soil; the foundation is guaranteed to have enough bearing capacity, and the cost of foundation engineering is reduced; the quality assurance of the foundation is improved in a prefabrication mode, the construction period is shortened, and the method is very suitable for shallow soil layer photovoltaic power station engineering.
Drawings
FIG. 1 is an overall schematic view of a photovoltaic bracket having a prefabricated barrel foundation;
FIG. 2 is a schematic structural view of a barrel foundation;
FIG. 3 is a top view of a barrel foundation;
FIG. 4 is a reinforcement bar diagram of a barrel foundation;
fig. 5 is a flow chart of a design method of a photovoltaic bracket prefabricated barrel foundation in a shallow soil layer area.
Reference numerals: the solar energy photovoltaic energy storage device comprises a 1-barrel-shaped foundation, a 2-photovoltaic support, 11-barrel walls, 12-barrel top plates, 13-ventilation holes, 14-shoe plates, 15-embedded bolts and 16-steel bars.
Detailed Description
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present invention are described in further detail below in connection with examples.
Example 1
Referring to fig. 1-4, a prefabricated barrel-shaped foundation of a photovoltaic support in a shallow soil layer area comprises a barrel-shaped foundation 1, wherein the barrel-shaped foundation 1 is a hollow barrel-shaped foundation 1 for prefabricating reinforced concrete 16, and by adopting the barrel-shaped structure, the contact area between the foundation and soil is enlarged under the condition of less concrete consumption, so that the foundation is ensured to have enough bearing capacity.
The barrel-shaped foundation 1 specifically comprises a barrel wall 11 and a barrel top plate 12, wherein the barrel wall 11 is arranged below the barrel top plate 12; the barrel wall 11 and the barrel top plate 12 are internally provided with steel bars 16 for reinforcement, and preferably, the barrel-shaped foundation 1 is stressed mainly by integral stress, the foundation steel bars are structural steel bars, the barrel top plate 12 steel bars 16 are recommended to be phi 10, and the side wall steel bars 16 are recommended to be phi 12.
The barrel top plate 12 is internally provided with an embedded bolt 15 and an air vent 13, the thread section of the embedded bolt 15 is higher than the upper surface of the barrel top plate 12, and the embedded bolt 15 is connected with the photovoltaic bracket 2 to realize the fixation of the photovoltaic bracket 2; a boot plate 14 is arranged below the barrel wall 11; the boot plate 14 is provided to further ensure smooth pressing down during construction.
The barrel-shaped foundation 1 is integrally formed; the outer diameter of the barrel-shaped foundation 1 is 400-600mm, the concrete grade is not lower than C40, and the grade of the steel bar 16 is not lower than HRB400; the thickness of the barrel top plate 12 is 150-250mm, and is mainly determined according to the anchoring length of the embedded bolt 15, when the engineering wind load is large, the large thickness is preferably considered to increase the dead weight to resist the pulling-up force, so that the installation condition of the embedded bolt 15 is met; the thickness of the barrel wall 11 is 80-120mm, and is mainly confirmed according to the corrosion characteristics of shallow soil, so that the enough durability is ensured; the diameter of the ventilation holes 13 is 50-80 mm; the shoe plate 14 is a pre-buried steel plate with the thickness of 8-12mm, and the shoe plate 14 is obliquely arranged below the barrel wall 11 at 45 degrees; the embedded bolt 15 is a U-shaped bolt, the diameter of the embedded bolt 15 is between 10 and 16mm, and the total length of the embedded bolt 15 is between 190 and 260 mm.
The design of the barrel-shaped foundation 1 fully utilizes the characteristics of the shallow soil layer, and increases the pulling-resistant bearing capacity of the foundation through the friction action of the inner side wall and the outer side wall of the barrel-shaped foundation 1 and soil; the self weight of the barrel-shaped foundation 1, the friction effect between the outer side of the barrel wall 11 and soil and the pressure bearing capacity of the soil at the bottom of the barrel foundation are utilized to increase the compression bearing capacity of the foundation; the horizontal force bearing capacity is improved through the mutual extrusion action of the side wall of the barrel-shaped foundation 1 and the surrounding soil; the foundation is guaranteed to have enough bearing capacity, and the cost of foundation engineering is reduced; the quality assurance of the foundation is improved in a prefabrication mode, the construction period is shortened, and the method is very suitable for shallow soil layer photovoltaic power station engineering.
A design method of a photovoltaic support prefabricated barrel shape in a shallow soil layer area comprises the following steps:
a) Determining the maximum depth available for the barrel foundation 1;
b) Obtaining an upward pulling force standard value T, a horizontal force standard value V and a downward pressure standard value P which act on the barrel foundation 1;
c) According to the available maximum depth of the barrel foundation 1 and the total load to be applied to the barrel foundation 1, primarily selecting the size of the barrel foundation 1 and determining the soil penetration depth of the barrel foundation 1;
d) According to the size of the primarily selected barrel-shaped foundation 1, calculating the pulling-resistant bearing capacity Ta, the horizontal bearing capacity Va and the compressive bearing capacity Pa of the barrel-shaped foundation 1;
e) Checking calculation is carried out;
f) If the checking calculation is not qualified, the size of the barrel-shaped foundation 1 is adjusted, and then the checking calculation is performed again until the bearing capacity requirement is met;
g) And after the checking calculation is qualified, the size design of the barrel-shaped foundation 1 is completed.
The detailed steps of the step a are as follows: according to the earlier-stage site data, the shallow soil layer thickness (namely the upper abdomen soil layer thickness of geomembranes such as ash fields, refuse landfills and the like or the surface soil layer thickness of bedrock) is obtained; the shallow soil layer thickness is the maximum usable depth of the barrel-shaped foundation 1.
The detailed steps of the step b are as follows: according to the multiple load, the standard value T of the pulling-up force, the standard value V of the horizontal force and the standard value P of the pressing-down force acting on the barrel foundation 1 are obtained through calculation and analysis of the upper support structure.
The multiple loads comprise engineering wind loads, earthquake actions, dead weight loads of the photovoltaic bracket 2 and the like.
The detailed steps of the step d are as follows: calculating the pulling-resistant bearing capacity Ta of the barrel-shaped foundation 1 according to the inner and outer friction resistance of the barrel-shaped foundation 1 and the self weight of the foundation; according to the soil pressure of the active and passive areas of the barrel-shaped foundation 1, calculating the horizontal bearing capacity Va of the barrel-shaped foundation 1; the compressive load capacity Pa of the barrel foundation 1 is calculated from the outside frictional resistance and the end resistance of the barrel foundation 1.
The detailed steps of the step e are as follows: comparing the magnitude of the pulling-resistant bearing capacity Ta with the magnitude of the pulling-up force standard value T; comparing the magnitude of the horizontal bearing capacity Va and the horizontal force standard value V; and comparing the compressive bearing capacity Pa with a lower pressure standard value P.
The qualification of the checking in the step g means that: t is less than or equal to Ta, V is less than or equal to Va and P is less than or equal to Pa; through the method, the barrel-shaped foundation 1 is prefabricated in a factory and then is transported to an engineering site, and then the vertical dimension design of the foundation is completed to a design position through a static press, so that the foundation is fixed in a shallow soil layer; the construction process is very convenient, the construction is quick, and the production cost is low; the design position considers the surface soil characteristics, the soil penetration depth is not less than 300mm, and the soil penetration depth is more than 400 mm.
Example two
The second embodiment is the application of the construction method of the prefabricated barrel-shaped photovoltaic bracket 2 in the shallow soil layer area in a certain gray field photovoltaic power station in the northwest area.
The thickness of the gray field shallow filling layer is about 0.6m; with the barrel-shaped foundation 1, specifically, the diameter of the barrel-shaped foundation 1 is 0.5m, the depth of penetration is 0.4m, the thickness of the barrel top plate 12 is 0.2m, and the total height of the barrel-shaped foundation 1 is 0.6m.
The above examples merely illustrate specific embodiments of the application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it is possible for a person skilled in the art to make several variants and modifications without departing from the technical idea of the application, which fall within the scope of protection of the application.
Claims (2)
1. The design method of the photovoltaic support prefabricated barrel-shaped foundation in the shallow soil layer area is characterized by comprising the following steps of:
a) Determining the maximum depth available for the barrel foundation (1);
b) Obtaining an upward pulling force standard value T, a horizontal force standard value V and a downward pressure standard value P which act on a barrel-shaped foundation (1);
c) According to the available maximum depth of the barrel-shaped foundation (1) and the total load to be acted on the barrel-shaped foundation (1), primarily selecting the size of the barrel-shaped foundation (1) and determining the depth of the barrel-shaped foundation (1) into the soil;
d) According to the size of the primary selected barrel-shaped foundation (1), calculating the pulling-resistant bearing capacity Ta, the horizontal bearing capacity Va and the compressive bearing capacity Pa of the barrel-shaped foundation (1);
e) Checking calculation is carried out;
f) If the checking calculation is not qualified, the size of the barrel-shaped foundation (1) is adjusted, and then the checking calculation is carried out again until the bearing capacity requirement is met;
g) After the inspection is qualified, the size design of the barrel-shaped foundation (1) is completed;
The detailed steps of the step a are as follows: acquiring the thickness of the shallow soil layer according to the earlier-stage field data; the thickness of the shallow soil layer is the available maximum depth of the barrel-shaped foundation (1);
the detailed steps of the step b are as follows: according to the multiple load, the standard value T of the pulling-up force, the standard value V of the horizontal force and the standard value P of the pressing-down force acting on the barrel-shaped foundation (1) are obtained through calculation and analysis of an upper bracket structure;
the multiple load comprises engineering wind load, earthquake action and dead weight load of the photovoltaic bracket (2);
the detailed steps of the step d are as follows: calculating the pulling-resistant bearing capacity Ta of the barrel-shaped foundation (1) according to the inner and outer friction resistance of the barrel-shaped foundation (1) and the self weight of the foundation; according to the soil pressure of the active and passive areas of the barrel-shaped foundation (1), calculating the horizontal bearing capacity Va of the barrel-shaped foundation (1); calculating the compression bearing capacity Pa of the barrel-shaped foundation (1) according to the external friction resistance and the end resistance of the barrel-shaped foundation (1);
The detailed steps of the step e are as follows: comparing the magnitude of the pulling-resistant bearing capacity Ta with the magnitude of the pulling-up force standard value T; comparing the magnitude of the horizontal bearing capacity Va and the horizontal force standard value V; comparing the compression bearing capacity Pa with a lower pressure standard value P;
The shallow soil layer region photovoltaic support prefabricated barrel-shaped foundation comprises a barrel-shaped foundation (1), wherein the barrel-shaped foundation (1) comprises a barrel wall (11) and a barrel top plate (12), and the barrel wall (11) is arranged below the barrel top plate (12); steel bars (16) are arranged in the barrel wall (11) and the barrel top plate (12) for reinforcement; the novel photovoltaic device is characterized in that an embedded bolt (15) and an air hole (13) are formed in the barrel top plate (12), the thread section of the embedded bolt (15) is higher than the upper surface of the barrel top plate (12), and the embedded bolt (15) is connected with the photovoltaic bracket (2) to fix the photovoltaic bracket (2); a boot plate (14) is arranged below the barrel wall (11);
The barrel-shaped foundation (1) is prefabricated and integrally formed; the outer diameter of the barrel-shaped foundation (1) is 400-600mm, the concrete grade is not lower than C40, and the grade of the steel bar (16) is not lower than HRB400; the thickness of the barrel top plate (12) is 150-250 mm; the diameter of the ventilation holes (13) is 50-80 mm; the thickness of the barrel wall (11) is 80-120 mm;
The shoe plate (14) is an embedded steel plate with the thickness of 8-12mm, and the shoe plate (14) is obliquely arranged below the barrel wall (11) at 45 degrees; the embedded bolt (15) is a U-shaped bolt, the diameter of the embedded bolt (15) is between 10 and 16mm, and the total length of the embedded bolt (15) is between 190 and 260 mm.
2. The method for designing the prefabricated barrel-shaped foundation of the photovoltaic bracket in the shallow soil region according to claim 1, wherein the checking qualification in the step g is: t is less than or equal to Ta, V is less than or equal to Va and P is less than or equal to Pa.
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