Expansion type photovoltaic support foundation

Abstract

The utility model provides an expansion type photovoltaic support foundation which comprises a steel pipe pile, a push rod and an expansion head, a top cover plate is arranged on the top of the steel pipe pile, threads are arranged on the top cover plate, an unthreaded hole is internally connected with a screw in a threaded mode, the bottom of the screw is coaxially and fixedly connected with the top end of the push rod, the bottom end of the push rod is fixedly connected with the expansion head, and the expansion head is a regular polygon frustum. Multiple expansion joints are formed in the bottom of the side wall of the steel pipe pile at equal intervals. The steel pipe pile is simple and reasonable in structural design, high in practicability, capable of enabling the steel pipe pile to expand, increasing the contact area and the friction force between the steel pipe pile and a soil body, capable of remarkably improving the bearing capacity and the pulling resistance, low in manufacturing cost, easy and convenient to construct and capable of being used and popularized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic construction technical field, concretely relates to an expansion type photovoltaic support foundation. BACKGROUND

[0002] As a clean and renewable energy form, photovoltaic power generation has been widely used in the world in recent years, especially in the northwest region of China. Due to sufficient sunlight and sparsely populated areas, the construction scale of photovoltaic power stations is rapidly expanding. However, the unique geological and climatic conditions in the northwest region also pose many challenges to the foundation construction of photovoltaic power stations.

[0003] The geological conditions in the northwest region are mainly desert and gobi, with loose soil structure and low cohesion. This soil characteristic leads to significant difficulties in the bearing capacity and stability of photovoltaic support foundations. Traditional photovoltaic support foundations usually rely on steel pile structures, providing sufficient bearing capacity by increasing the diameter or embedding depth of the pile body. However, in loose soil conditions, simply increasing the size of the pile body often cannot effectively solve the problem of insufficient bearing capacity. Loose soil is difficult to provide sufficient friction and support, making it difficult for the pile body to be stable in the soil, thereby affecting the stability of the entire photovoltaic system. In addition, increasing the diameter and embedding depth of the pile body also significantly increases material costs and puts higher requirements on construction equipment and technology, thereby prolonging the construction period and increasing construction costs.

[0004] The northwest region has strong winds all year round, especially under high wind speed conditions. Photovoltaic panels will produce significant uplift force and swing effect under wind load. Traditional steel pile foundations are prone to displacement or tilting under such wind action, and even lead to instability of the support foundation, seriously affecting the safety and operating efficiency of photovoltaic power stations. Especially in loose soil, due to the low cohesion of the soil, dynamic force caused by wind load is more likely to cause instability of the pile body. Therefore, how to improve the stability and uplift resistance of photovoltaic support foundations in loose soil and strong wind environments has become a key requirement in the construction of photovoltaic power stations.

[0005] Based on the above problems, the existing technology proposes some improvement measures, such as increasing the diameter of the pile body, using corrosion-resistant materials, or adopting a multi-point anchoring structure to enhance the stability and durability of the foundation. However, these solutions usually result in high construction costs and complex construction processes, which are not conducive to the large-scale application of photovoltaic power stations. Therefore, there is an urgent need for a foundation structure that can improve the bearing capacity and uplift resistance of photovoltaic support foundations, simplify the construction process, reduce costs, and adapt to complex geological and harsh climatic conditions. UTILITY MODEL CONTENT

[0006] The utility model wants to solve the technical problem in view to the deficiency of prior art, provide a kind of expansion type photovoltaic support foundation, the foundation bearing device structure simple and reasonable, practicality is strong, can make steel pipe pile expand, increase the contact area and friction force of steel pipe pile and soil, can significantly improve bearing capacity and anti-pulling performance, production cost is low, construction is simple, can use widely.

[0007] To solve the above technical problems, the utility model adopts the technical scheme: an expansion type photovoltaic support foundation, characterized in that, including steel pipe pile, push rod and expansion head, the top of steel pipe pile is provided with top cover plate, the top cover plate is provided with light hole for the top of push rod to pass out, the top of push rod is coaxially fixedly connected with screw rod, the bottom end of push rod is fixedly connected with expansion head, the expansion head is regular polygonal platform, the bottom of the lateral wall of steel pipe pile is equidistantly provided with a plurality of expansion slots.

[0008] Preferably, the screw rod is threadedly connected with an adjusting bolt.

[0009] Preferably, the expansion head is regular octagonal platform, the bottom of the lateral wall of steel pipe pile is equidistantly provided with four expansion slots, and the diagonal length of the bottom surface of the expansion head is equal to the outer diameter of the steel pipe pile.

[0010] Preferably, the steel pipe pile is made of high-strength alloy steel, and the inside and outside of the steel pipe pile are coated with a corrosion-resistant layer.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The utility model has simple and reasonable structure design, high practicability and low production cost, and can increase the contact area and friction force with soil through expansion and expansion effect, improve the bearing capacity and anti-pulling performance, and can be widely used.

[0013] 2. The utility model significantly improves the friction and adhesion between the pile body and the surrounding soil by increasing the lateral contact area of the pile body, and can provide sufficient support even in loose soil. In addition, the expansion head in the shape of regular octagonal platform can effectively prevent the linkage of the push rod and the adjusting bolt during the tightening process of the adjusting bolt, avoid the phenomenon of wire slipping, and ensure the stability and uniformity of the expansion process.

[0014] 3. The utility model has the design of expansion type structure, which can ensure the bearing capacity and anti-pulling performance while reducing the diameter and embedding depth of the pile body, thereby reducing the material usage and construction cost. In addition, high-strength alloy steel is selected as the pile body material and is subjected to corrosion-resistant treatment, so that it can maintain long-term stability and durability in salinization environment.

[0015] 4, The utility model pile body structure and expansion mechanism design has high adaptability, can adjust according to different geological conditions. By adjusting the expansion range and the pile body buried depth, the best supporting effect under various complex environments can be guaranteed, and the applicability and application value of the utility model are greatly improved.

[0016] The utility model will be further explained in detail below in connection with the drawings and examples. DRAWINGS

[0017] Fig. 1 It is the main view cross section structure schematic diagram of the utility model.

[0018] Fig. 2 It is the overhead structure schematic diagram of the utility model in top cover plate.

[0019] Fig. 3 It is the overhead structure schematic diagram of the utility model in expansion head.

[0020] Fig. 4 It is the overhead cross section structure schematic diagram of the utility model in the expansion joint of steel pipe pile.

[0021] Mark explanation:

[0022] 1 - screw rod, 2 - adjusting bolt, 3 - top cover plate,

[0023] 4 - steel pipe pile, 5 - push rod, 6 - expansion head,

[0024] 7 - expansion joint, 8 - light hole. DETAILED DESCRIPTION

[0025] As Figs. 1 to 4 shown, the utility model includes steel pipe pile 4, push rod 5 and expansion head 6, the top of steel pipe pile 4 is provided with top cover plate 3, the top cover plate 3 is provided with light hole 8, the light hole 8 is used for the light hole 8 of push rod 5 top, the top of push rod 5 is coaxially fixedly connected screw rod 1, the bottom end of push rod 5 is fixedly connected expansion head 6, expansion head 6 is regular octagonal platform, the bottom of the lateral wall of steel pipe pile 4 is provided with four expansion joints 7 at equal intervals.

[0026] In the embodiment, the screw rod 1 is threadedly connected with the adjusting bolt 2, and the adjusting bolt 2 is located above the top cover plate 3.

[0027] In the embodiment, the bottom surface diagonal length of the expansion head 6 is equal to the outer diameter of the steel pipe pile 4, so that the cross-sectional dimension of the expansion head 6 is greater than the inner diameter of the steel pipe pile 4, and the expansion requirement of the bottom of the steel pipe pile 4 is met.

[0028] In the embodiment, the steel pipe pile 4 is made of high-strength alloy steel, and the steel pipe pile 4 is coated with a corrosion-resistant layer inside and outside.

[0029] The construction and use steps of the embodiment are as follows:

[0030] S1, site leveling and layout: a comprehensive survey and preparation are performed on the construction site, the layout positions of the photovoltaic support foundations are accurately laid out using a total station or a GPS positioning device according to the design drawing requirements, and it is ensured that the positions of each pile body are accurate and correct. After the layout, the site is leveled, and sundries, tree roots and other obstacles are removed to ensure that the ground is level.

[0031] S2, geological drilling. After the site preparation is completed, geological drilling is performed at the layout position using a drilling device. The hole diameter should match the outer diameter of the steel pipe pile 4, and the drilling depth is determined according to the design requirements to ensure that the steel pipe pile 4 can reach the predetermined embedding depth. During the drilling process, the geological conditions need to be closely monitored to ensure the stability of the hole wall. If hard rock layers or other obstacles are encountered, the drill bit or the drilling process needs to be adjusted in time.

[0032] S3, lowering the steel pipe pile 4: after the drilling is completed, the steel pipe pile 4 is lowered into the hole. This process needs to be assisted by lifting equipment or other mechanical equipment to ensure that the steel pipe pile 4 can be lowered vertically into the hole, and the bottom slotted part is completely buried underground, and the upper part is exposed to the ground. During the lowering process, the position and perpendicularity of the steel pipe pile 4 need to be adjusted to ensure its accuracy, so as to avoid affecting the construction quality due to inclination or deviation, and the expansion head 6 is located at the bottom end outside of the steel pipe pile 4 at this time;

[0033] S4, bolt adjustment: after the steel pipe pile 4 is lowered to the predetermined depth, the adjusting bolts 2 are gradually tightened to move the push rod 5 upward to pull the expansion block 6 upward. Since the diagonal line length of the expansion block 6 is greater than the inner diameter of the steel pipe pile 4, when the expansion block 6 moves upward, it will press the bottom of the inner wall of the steel pipe pile 4 to open the expansion joint 7 and slowly expand the bottom of the steel pipe pile 4. During this process, it needs to be uniformly and slowly performed to ensure the stability and uniformity of the expansion process, and to avoid deformation or damage of the steel pipe pile 4 due to uneven stress.

[0034] S5, quality detection: after the expansion is completed, the expanded part at the bottom of the steel pipe pile 4 will closely fit the surrounding soil body, significantly increasing the contact area and friction force between the steel pipe pile 4 and the soil body. The pile body is detected to ensure that the expansion effect meets the design requirements, and the steel pipe pile 4 has sufficient bearing capacity and uplift resistance. After the detection is qualified, subsequent photovoltaic support installation is performed on the steel pipe pile 4.

[0035] The above is only a preferred embodiment of the present application, and does not limit the present application in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the present application still belongs to the protection scope of the technical solution of the present application.

Claims

1. An expanded photovoltaic support foundation, characterized by, It includes steel pipe pile (4), push rod (5) and expansion head (6), the top of steel pipe pile (4) sets up top cover plate (3), the top cover plate (3) is set up on the light hole (8) for push rod (5) top to go out, the top of push rod (5) coaxial fixed connection screw rod (1), the bottom end of push rod (5) fixed connection expansion head (6), the expansion head (6) is regular polygonal platform, the bottom of the side wall of steel pipe pile (4) is equidistantly provided with multiple expansion slits (7).

2. An expanded photovoltaic support foundation according to claim 1, wherein, The screw rod (1) is threadedly connected with an adjusting bolt (2).

3. An expanded photovoltaic mount foundation according to claim 1, wherein, The expansion head (6) is regular octagonal platform, the bottom of the side wall of steel pipe pile (4) is equidistantly provided with four expansion slits (7), and the diagonal length of the bottom surface of the expansion head (6) is equal to the outer diameter of the steel pipe pile (4).

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