Manufacturing method of photovoltaic pipe pile and photovoltaic pipe pile

Abstract

The invention relates to the technical field of photovoltaic pipe piles, and provides a manufacturing method of a photovoltaic pipe pile and the photovoltaic pipe pile. A composite non-steaming material, an expanding agent, anti-crack fibers, a corrosion inhibitor, metal fibers, quartz sand and other materials which are not contained in traditional photovoltaic pipe pile matching raw materials are added into a concrete matching material used by the photovoltaic pipe pile; the strength grade of the concrete is improved to C100 or above from C60 and C80 of a traditional photovoltaic pipe pile, the highest grade of the concrete can reach C120, and compared with the traditional photovoltaic pipe pile, the penetrating performance to a gravel bed is greatly improved, the cracking phenomenon before and after construction is effectively reduced, the durability is improved, meanwhile, the bearing capacity of a pile body is effectively improved, and the service life of the pile body is prolonged. The photovoltaic pipe pile is better suitable for most of existing photovoltaic pipe piles used in western saline-alkali high-corrosion zones and special overwater environments in middle and east, and the design service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic pipe piles, in particular to a manufacturing method of photovoltaic pipe piles and photovoltaic pipe piles. Background Art

[0002] As global fossil energy such as oil and coal are becoming increasingly depleted and environmental problems are becoming increasingly prominent, the photovoltaic power generation industry has been vigorously promoted in my country as a clean energy industry. However, the reality that my country has more land in the west and less in the east and that the northwest region has longer annual sunshine hours has resulted in most of my country's photovoltaic power generation projects being located in the water areas in the east and the sparsely populated areas in the northwest. Photovoltaic pipe piles, as the pillars of photovoltaic power generation facilities, have been widely used due to their many advantages such as high strength, fast construction and good adaptability.

[0003] However, both the aquatic environment in the east and central parts of China and the saline-alkali soil environment in the northwest region have higher requirements on the durability of concrete used for photovoltaic pipe piles. The existing photovoltaic pipe piles are basically of C60 or C80 strength grade and are made of ordinary concrete materials. The wall thickness is mostly 70mm or 95mm, which is relatively thin. The reinforcement ratio is low. Circumferential cracks or longitudinal cracks are very likely to appear during lifting, transportation, construction and subsequent use. In underwater environment and saline-alkali land environment, the durability will be greatly reduced, and the design service life is difficult to guarantee. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a manufacturing method and photovoltaic pipe piles, which completely eliminate the autoclave curing process of traditional photovoltaic pipe piles, have higher strength and stronger construction penetration, reduce cracking before and after construction, effectively improve the bearing capacity and durability of the pile body, and extend the service life.

[0005] The implementation of the present invention is: a method for manufacturing a photovoltaic pipe pile, comprising the following steps: S1, making a ferrule; S2, end plate hoop welding; S3, making roll-welded cage reinforcement skeleton; S4, preparing and mixing the proportioning materials of pile body concrete; S5. Loading, laying, tensioning and centrifugation are performed according to the existing process; S6, placing in a steam curing tank for steam curing; S7. After the pile body concrete reaches the demoulding strength (45MPa), demoulding and tensioning are carried out; S8. After inspection, the products are hoisted into the finished product yard for natural curing for 7 days.

[0006] Furthermore, in the preparation of the pile body concrete mix material, composite steam-free materials, expansion agents, anti-cracking fibers, rust inhibitors, and metal fibers that are not found in the raw materials of traditional photovoltaic pipe piles are added, and the concrete and the above materials are evenly mixed. The concrete strength grade is increased from C60 and C80 of traditional photovoltaic pipe piles to above C100, and the highest grade can reach C120. The pressure steaming curing process of traditional pipe piles can be eliminated, and the penetration performance of the gravel layer during the construction of the finished product can be effectively improved, and the cracking phenomenon caused during the production and construction process can be reduced. The durability performance is improved while the pile body bearing capacity is improved. It can better adapt to the western saline-alkali high corrosion zone and the special water environment in the central and eastern parts where the existing photovoltaic pipe piles are commonly used, and extend the design service life.

[0007] Furthermore, the anti-cracking fiber is polypropylene fiber.

[0008] Furthermore, the expansion agent is a UEA expansion agent.

[0009] Furthermore, the rust inhibitor is JK-H2O(A) composite amino alcohol steel bar rust inhibitor.

[0010] Furthermore, the metal fiber is a hook-end copper-plated fiber.

[0011] Furthermore, the composite steam-free material is a composite material of silica fume, microbeads, mineral powder, etc., wherein the silica fume has a silicon dioxide content of more than 85%, and the mineral powder grade is S105.

[0012] The composite steam-free material is a composite material of silica fume, microbeads and mineral powder, in which the silica fume has a silicon dioxide content of more than 85%, the microbead content is 5-10%, and the mineral powder content is 5-10%, totaling 100%, and the mineral powder grade is S105.

[0013] Furthermore, the five materials of the anti-cracking fiber, the expansion agent, the rust inhibitor, the metal fiber and the composite steam-free material are added and stirred at the same time.

[0014] Furthermore, five materials, namely, anti-cracking fiber, expansion agent, rust inhibitor, metal fiber and composite steam-free material, are added and stirred at the same time. The concrete mix ratio is specifically 380-390Kg / m³ of cement, 160-170Kg / m³ of composite steam-free material, 45-55Kg / m³ of expansion agent, 15-25Kg / m³ of rust inhibitor, 1500-1700Kg / m³ of metal fiber, 140-160Kg / m³ of water, 0.5-2Kg / m³ of anti-cracking fiber, 3-5Kg / m³ of water reducing agent and 600-800Kg / m³ of medium-coarse sand.

[0015] Furthermore, the photovoltaic tube pile is manufactured by the photovoltaic tube pile manufacturing method.

[0016] The present invention also provides a photovoltaic pipe pile, and the photovoltaic pipe pile is manufactured by the manufacturing method of the photovoltaic pipe pile.

[0017] The present invention has the following advantages: 1. The present invention improves the concrete strength grade of photovoltaic pipe piles from the traditional C60 and C80 to C100 or above, and up to C120. This improvement significantly enhances the penetration of the pile body into the gravel layer, reduces the cracking phenomenon during construction and use, and thus improves the durability and bearing capacity of the pile body; 2. The present invention adds anti-cracking fibers during the concrete mixing process, which effectively prevents the shrinkage and cracking of the pile body during the concrete curing process. This addition not only controls the cracking caused by shrinkage and temperature changes, but also inhibits the formation of original cracks in the concrete, thereby enhancing the toughness and durability of the concrete; 3. The present invention adds a rust inhibitor to the concrete, which reacts with the surface of the steel bar to form a passivation chemical film, thereby effectively preventing the steel bar from rusting. This film reduces the surface free enthalpy of the concrete mixture, reduces water seepage, and improves the water retention capacity of the concrete; 4. The present invention shortens the curing time of concrete and quickly improves the strength of concrete by adding composite steam-free materials, so that photovoltaic pipe piles can quickly reach the design strength without relying on high-pressure steam curing, while reducing water cracks during the curing process and improving the overall durability of concrete; 5. The improved photovoltaic pipe piles of the present invention are more suitable for the western saline-alkali high corrosion zone and the special water environment in the central and eastern parts of the country, extending the design service life, providing a more reliable support structure for photovoltaic power generation projects, while reducing the frequency of maintenance and replacement, and significantly improving the overall economic benefits. DETAILED DESCRIPTION

[0018] The present invention provides a method for manufacturing a photovoltaic pipe pile, comprising the following steps: The implementation mode of the present invention is: A method for manufacturing a photovoltaic pipe pile, comprising the following steps: S1, making a ferrule; S2, end plate hoop welding; S3, making roll-welded cage reinforcement skeleton; S4, preparing and mixing the proportioning materials of pile body concrete; S5. Loading, laying, tensioning and centrifugation are performed according to the existing process; S6, placing in a steam curing tank for steam curing; S7. After the pile body concrete reaches the demoulding strength (45MPa), demoulding and tensioning are carried out; S8. After inspection, the products are hoisted into the finished product yard for natural curing for 7 days.

[0019] In S4, anti-cracking fibers are added in advance during the mixing of the pile body concrete, and the concrete and the anti-cracking fibers are mixed evenly. The anti-cracking fibers can prevent the shrinkage and cracking of the pile body during the concrete curing process, effectively control the cracking caused by factors such as concrete shrinkage and temperature environment changes, inhibit the formation of native cracks in the concrete, increase the toughness of the concrete, and thus improve the durability of the concrete; in a specific embodiment, the anti-cracking fibers are polypropylene fibers.

[0020] In S4, an expansive agent is added in advance during the mixing of the pile body concrete, and the concrete and the expansive agent are mixed evenly. The expansive agent plays a role in compensating for shrinkage during the hydration of concrete, can effectively prevent shrinkage cracking problems, and plays a good role in preventing cracks and impermeability in the later use of photovoltaic pipe piles. In a specific embodiment, the expansive agent is preferably a UEA expansive agent.

[0021] In S4, a rust inhibitor is added to the pile body concrete before mixing, and the concrete and the rust inhibitor are mixed evenly. In a specific embodiment, the rust inhibitor is a JK-H2O (A) composite amino alcohol steel bar rust inhibitor. After the rust inhibitor is added, the rust inhibitor will be adsorbed onto the steel bar surface in an ionic or gaseous state. Since the electric field of the steel bar is very strong, these rust inhibitor molecules are adsorbed toward the steel bar. After reaching the steel bar surface, they react with the steel bar to form a chemical film similar to rust. This chemical film is quite passivated and will not dissolve in water and be lost as easily as rust. The surface free enthalpy is reduced, that is, the surface tension of the solution is reduced, so that the concrete mixture produces many tiny closed bubbles during the mixing process. The bubble diameter and spacing coefficient are mostly below 200 μm, thereby improving the water retention capacity of the cement and greatly reducing the water seepage performance of the concrete mixture.

[0022] In S4, metal fibers are added in advance during the mixing of the pile body concrete, and the concrete and the metal fibers are mixed evenly. The metal fibers are an important component of the photovoltaic pipe pile concrete, which makes the concrete have the advantages of ultra-high strength, high toughness, high durability, and good volume stability. In a specific embodiment, the metal fibers are end-hook copper-plated fibers.

[0023] In S4, the composite steam-free material is added in advance during the mixing of the pile body concrete, and the concrete and the composite steam-free material are mixed evenly. The composite steam-free material will effectively shorten the concrete curing time, quickly improve the concrete strength, and enable the photovoltaic pipe pile to quickly reach a very high strength even without high-pressure steam curing; by matching powders of different particle sizes and finenesses with each other, the photovoltaic pipe pile concrete will be more compact after forming, reducing the occurrence of water cracks during the curing process and improving the durability of the concrete. In a specific embodiment, the composite steam-free material is a composite material of silica ash, microbeads, mineral powder, etc., wherein the silica ash has a silicon dioxide content of more than 85%, the microbead content is 5%, the mineral powder content is 10%, and the mineral powder grade is S105. Of course, other composite steam-free materials for concrete can also be used.

[0024] The anti-cracking fiber, expansion agent, rust inhibitor, metal fiber and composite steam-free material of the present invention are added simultaneously when preparing concrete and used as a whole, so that the photovoltaic pipe piles are stronger and have stronger construction penetration, reduce cracking before and after construction, effectively improve the bearing capacity and durability of the pile body, and thus extend the service life.

[0025] The present invention also provides a photovoltaic pipe pile, and the photovoltaic pipe pile is manufactured by the manufacturing method of the photovoltaic pipe pile.

[0026] Now the present invention will be described in detail with reference to specific embodiments:

[0027] The C110 grade concrete mix is ​​as shown in the following table: Among them, polycarboxylic acid (solid content 20%) means that the liquid polycarboxylic acid water reducer contains 20% water reducer solids.

[0028] The specific proportions of concrete of each strength grade of the photovoltaic pipe pile body concrete are prepared in combination with the actual needs of the project. The above is only a preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited to this. Any equivalent modifications and changes made by any technician familiar with the technical field in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for manufacturing a photovoltaic pipe pile, comprising the following steps: S1, making a ferrule; S2, end plate hoop welding; S3, making roll-welded cage reinforcement skeleton; S4, preparing and mixing the proportion of materials for pile body concrete; S5. Loading, laying, tensioning and centrifugation are performed according to the existing process; S6, placing in a steam curing tank for steam curing; S7, demoulding and tensioning are carried out after the concrete of the pile body reaches the demoulding strength of 45MPa; S8. After inspection, the finished product is hoisted and transported to the finished product yard for natural curing; Features: In the preparation of the pile body concrete mix material, composite steam-free material, expansion agent, anti-cracking fiber, rust inhibitor, and metal fiber are added, and the concrete material and the above materials are mixed evenly. The concrete strength grade is increased from C60 and C80 of traditional photovoltaic pipe piles to above C100, and the highest grade can reach C120. The pressure steaming curing process of traditional pipe piles can be eliminated, and the penetration performance of the gravel layer during the construction of the finished product can be effectively improved, and the cracking phenomenon caused by the production and construction process can be reduced. The bearing capacity of the pile body is improved while the durability is improved. It can better adapt to the western saline-alkali high corrosion zone and the special water environment in the central and eastern parts where the existing photovoltaic pipe piles are commonly used, and extend the design service life.

2. The method for manufacturing a photovoltaic pipe pile according to claim 1, characterized in that: The anti-cracking fiber is polypropylene fiber.

3. The method for manufacturing a photovoltaic pipe pile according to claim 1, characterized in that: The expansion agent is a UEA expansion agent.

4. The method for manufacturing a photovoltaic pipe pile according to claim 1, characterized in that: The rust inhibitor is JK-H2O(A) composite amino alcohol steel bar rust inhibitor.

5. The method for manufacturing a photovoltaic pipe pile according to claim 1, characterized in that: The metal fiber is a hook-end copper-plated fiber.

6. The method for manufacturing a photovoltaic pipe pile according to claim 1, characterized in that: The composite steam-free material is a composite material of silica fume, microbeads and mineral powder, wherein the silica fume has a silicon dioxide content of more than 85% and the mineral powder grade is S105.

7. A method for manufacturing a photovoltaic pipe pile according to claim 6, characterized in that: The composite steam-free material is a composite material of silica fume, microbeads and mineral powder, wherein the silica fume has a silicon dioxide content of more than 85%, the microbead content is 5-10%, and the mineral powder content is 5-10%, which is 100% in total, and the mineral powder grade is S105.

8. The method for manufacturing a photovoltaic pipe pile according to claim 1, characterized in that: The specific concrete mix ratio is cement 380-390Kg / m³, composite steam-free material 160-170Kg / m³, expansion agent 45-55Kg / m³, rust inhibitor 15-25Kg / m³, metal fiber 1500-1700Kg / m³, water 140-160Kg / m³, anti-cracking fiber 0.5-2Kg / m³, water reducer 3-5Kg / m³, medium coarse sand 600-800Kg / m³.

9. A photovoltaic pipe pile, characterized in that: The photovoltaic tube pile is of C110 grade and is manufactured by the photovoltaic tube pile manufacturing method according to any one of claims 1 to 9.

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