Snake-scale-imitated pile foundation for construction of fishing-light complementary photovoltaic power station

Abstract

The invention discloses a snake-scale-imitated pile foundation for construction of a fishing-light complementary photovoltaic power station, which comprises a pile body, a guide conical surface positioned at a pile tip at the front end of the pile body and bionic snake scales annularly coating the pile body, and the bionic snake scales sequentially form a scale sparse section and a scale dense section from bottom to top along the pile body. The section of each bionic snake scale is in an inverted cone shape, and the portion, close to the pile tip, of each bionic snake scale is narrower than the portion, close to the pile body, of each bionic snake scale. Special textures or structures are formed on the surface of the pile body to simulate the microstructure characteristics of the surface of the snakeskin, so that the friction force between the pile and surrounding soil can be increased, the stability and the pulling resistance of the pile body are improved, the pile body has a better fixing effect in a water area environment, disturbance to the surrounding environment is reduced, and the service life of the pile body is prolonged. Meanwhile, the installation and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of support structure, and particularly relates to a snake scale imitating pile foundation for construction of fish-light complementary photovoltaic power station. BACKGROUND

[0002] In a fishpond photovoltaic system, a photovoltaic pile is an important foundation for supporting photovoltaic components, and the uplift resistance of the pile directly affects the stability and safety of the system. At present, the most common pile foundation form is still mainly ordinary steel pipe piles and spiral piles, supplemented by H-shaped steel or combined steel piles with large project scale requirements. However, there are often silt and quicksand environments at the bottom of the fishpond, and the fishpond is easily affected by factors such as water flow and fish activity, and the traditional pile body design cannot provide sufficient uplift resistance and embedded force. However, in order to ensure the long-term stable operation of the system, it is usually necessary to use higher strength materials or increase the number of pile bodies, thereby causing a significant increase in the overall cost. SUMMARY

[0003] The purpose of the application is to provide a snake scale imitating pile foundation for construction of fish-light complementary photovoltaic power station with uplift resistance and embedded force.

[0004] Technical scheme: In order to achieve the above purpose, the application discloses a snake scale imitating pile foundation for construction of fish-light complementary photovoltaic power station, which comprises a pile body, a guide cone surface at a front end pile tip of the pile body, and a bionic snake scale piece wrapped around the pile body. The bionic snake scale piece is sequentially formed with a scale sparse section and a scale dense section from bottom to top along the pile body. The cross-sectional shape of the bionic snake scale piece is inverted conical, and the part of the bionic snake scale piece close to the pile tip is narrower than the part close to the pile body.

[0005] Optionally, the height H of the bionic snake scale piece is 10-15 times the width L of the bionic snake scale piece.

[0006] Optionally, the width L of the bionic snake scale piece is 50-100 mm.

[0007] Optionally, the scale inclination angle of the scale sparse section is smaller than the scale inclination angle of the scale dense section.

[0008] Optionally, the length of the scale dense section is greater than the length of the scale sparse section.

[0009] Optionally, the pile body and the bionic snake scale piece are integrally formed.

[0010] Optionally, the guide cone surface is connected with the bottom end of the pile body 1 through welding or integral forming, and forms a smooth transition.

[0011] Optionally, the pile body is a hollow tubular structure.

[0012] Optionally, the tail end of the pile body has a pile body round section.

[0013] Optionally, the pile body, guide cone surface and surface of the bionic snake scale are coated with epoxy resin or hot-dip galvanizing layer.

[0014] Advantages: Compared with the prior art, the present application has the following remarkable advantages: (1) The present application forms a special texture or structure on the surface of the pile body to imitate the microstructure characteristics of snake skin, which can increase the friction between the pile and the surrounding soil, improve the stability and uplift resistance of the pile body, and make it have better fixing effect in water environment, reduce disturbance to the surrounding environment, and reduce installation and maintenance costs; (2) The bionic snake scale design in the present application imitates the gripping characteristics of the scales of a snake on the ground when moving, and the optimized scale shape makes the pile body have better uplift resistance and overturning resistance in the soil; compared with the design without scales, the damage and deformation of the photovoltaic pile foundation can be reduced; in addition, in the case of soil settlement or liquefaction, the bionic scale design can stabilize the pile body, reduce the inclination or cracking of the pile body caused by foundation deformation, and reduce the later maintenance cost; (3) The scales in the present application are evenly distributed in a ring shape, which has high compatibility with construction equipment compared with spiral distribution; the ring-shaped distribution does not require rotating force to be applied to the pile body, and is suitable for conventional pile sinking equipment such as hammering method and static pressure method; the construction process is simple, time and equipment cost are saved; and the ring-shaped scales do not produce rotational disturbance to the soil during construction, reducing the sliding and cutting resistance of the soil; it is especially suitable for strata such as soft soil or silty clay which are easily disturbed; when the pile body is subjected to uplift force, each ring of scales comes into contact with the soil, and the uplift force can be uniformly transmitted to the entire pile body, avoiding failure caused by excessive stress on one side; (4) The present application adjusts the scale height according to the depth, with larger scale height near the pile tip and smaller scale height near the pile body; while improving the uplift resistance, the sinking resistance is also considered, improving the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a front view of the present application; Figure 3 is a cross-sectional schematic diagram of the scale in the present application Figure 4 is a deformation (displacement) cloud chart of the bionic snake scale pile foundation uplift finite element simulation in the present application; Figure 5 is a pile top reaction force-time curve of the bionic snake scale pile foundation uplift finite element simulation in the present application; Figure 6 is a deformation (displacement) cloud chart of the smooth pile uplift finite element simulation in the present application; Figure 7Figure 2 shows the time curve of the counterforce at the top of the pile in the finite element simulation of the smooth pile in the present application. DETAILED DESCRIPTION

[0016] The technical solutions of the present application are further described below in conjunction with the drawings.

[0017] As shown in Figure 1 the present application, the imitation snake scale pile foundation for the fish-light complementary photovoltaic power station construction includes a pile body 1, a guide cone surface 2, a pile body smooth round section 11, a scale dense section 12, a scale sparse section 13, and imitation snake scales 121 / 131. The tail end of the pile body has a pile body smooth round section, the guide cone surface 2 is located at the front end of the pile body 1, the guide cone surface 2 is used to reduce the pile sinking resistance and guide the pile body to penetrate the soil layer, the length of the guide cone surface 2 is about 1 meter, the diameter of the tip is 50 mm, the diameter of the tail end is 300 mm, and the taper is about 7°. The setting of the guide cone surface 2 can reduce the resistance of the pile body entering the soil layer, facilitate pile sinking construction, ensure the stability of the direction of the pile body, and avoid deviation; the guide cone surface 2 is connected with the bottom end of the pile body 1 by welding or integrated molding, forming a smooth transition.

[0018] The pile body 1 is located above the guide cone surface 2 and is the main part of the pile body, used to bear the structural load. The total length of the pile body 1 is set to 12 meters according to the empirical value (not including the guide cone surface). The diameter of the pile body 1 is set to 300 mm, the material of the pile body 1 is high-strength steel, and the surface is coated with a corrosion-resistant layer. The pile body 1 provides the main bearing capacity and uplift resistance.

[0019] The imitation snake scales are distributed on the surface of the pile body, and the imitation snake scales are annularly wrapped on the pile body to enhance the friction. The pile body 1 is connected through the tail end of the guide cone surface 2 and receives the load thereof, the imitation snake scales 121 / 131 are integrally molded with the pile body 1 by an integrated mold to realize seamless connection, significantly improve the strength and production efficiency. The pile body 1 is designed as a hollow tubular structure, combining the requirements of light weight and strength, and adapting to complex geological environments. Parameterized design (such as width L and height H) of the imitation snake scales 121 / 131 is more accurate through mold production, which can be flexibly adjusted according to different engineering requirements.

[0020] The bionic snake scales are sequentially formed with a sparse scale section and a dense scale section along the pile body from bottom to top. The cross-sectional shape of the bionic snake scales is inverted conical. The part of the bionic snake scales close to the pile tip is narrower than the part close to the pile body, that is, the part of the bionic snake scales close to the pile tip is relatively narrow, while the part close to the pile body is relatively wide. The change from narrow to wide can form a "soil cutting surface" during the process of the pile body entering the soil, which is easier to cut and compact the soil, and the soil is less subjected to lateral extrusion, thereby reducing the resistance during construction. In addition, the scale size close to the pile tip is small, which reduces the excessive disturbance to the surrounding soil during pile sinking, thereby avoiding the premature extrusion of the soil to the surface of the pile body, leading to the superposition of resistance, making the initial stage of pile sinking more stable, and improving the construction efficiency.

[0021] On the contrary, when the pile body is subjected to horizontal force (pushing the structure) or upward tension (lifting the structure) due to wind load, or tries to "pull out" the pile body due to water buoyancy, the bionic snake scales 121 / 131 close to the wide end of the pile body 1 have a large contact area with the soil, which can form a "soil locking effect", thereby enhancing the overall uplift resistance of the pile body. Under the action of the pulling force, the wide end scales can further compact the surrounding soil, thereby enhancing the resistance of the soil.

[0022] In addition, the design of the bionic snake scales 121 / 131 can also help to adaptively optimize the pile body. The uplift resistance provided by the bionic snake scales 121 / 131 enables the pile body 1 to effectively transition at the junction of soft and hard soil layers, thereby preventing uneven settlement or tilting of the pile body due to soil sliding.

[0023] The height H of the bionic snake scales is 10-15 times the width L of the bionic snake scales, which gradually increases with depth. The width L of the bionic snake scales is 50-100 mm, and it is not advisable to set it too wide. Too wide scales significantly increase the soil extrusion and shear resistance, affecting the pile sinking efficiency. The inclination angle of the sparse scale section is smaller than that of the dense scale section. The length of the dense scale section is greater than that of the sparse scale section. The pile body and the bionic snake scales are integrally formed. The sparse scale section is located in the lower section, which is relatively labor-saving during penetration. The inclination angle close to the pile bottom is small, the soil breaking area is smaller during penetration, the concentrated shear failure zone is more limited, and the friction resistance is also easier to disperse, so it is easier to penetrate the soil than the large-angle scale.

[0024] At a distance of 1-4 m from the pile tip, the L / H of the bionic snake scales 131 is 1 / 15, which can make the lower part of the bionic snake scales 131 have a relatively gentle inclination angle, and the relatively sparse bionic snake scales 131 close to the pile tip can reduce the contact area with the soil, reduce the resistance at the initial stage, and avoid the phenomenon of "hard extrusion". It ensures the penetration efficiency of the pile body and reduces the disturbance of the soil.

[0025] At 4-12m from the pile tip, the L / H of the bionic snake scale 121 is 1 / 10, and the soil in contact with this part of the pile body is mostly the main embedded area, which is suitable for using the high shear performance of the soil as the main anti-pull area. The dense bionic snake scale 121 arrangement can make the soil not easy to slip when subjected to pulling force, providing strong embedded effect and maximizing the use of its shear strength.

[0026] The circular distribution of the bionic snake scale 121 / 131 provides uniform anti-pulling force and avoids local stress concentration. Each layer of scales can form a strong embedded force with the soil, increasing the friction. The bionic snake scale 121 / 131 has a smooth corner design and is cold-pressed into shape. The smooth corner of the present application reduces the resistance of the scale entering the soil, allowing the soil to flow more smoothly along the edge of the scale. Compared with the sharp corner design, the smooth corner can reduce the construction resistance by about 10%~20%, especially in soft soil or silty clay layer; the sharp corner may cut too many particles in the soil, causing the soil to accumulate around the scale, thereby increasing the difficulty of pile sinking; the smooth design allows soil particles to flow and disperse, reducing the congestion phenomenon; during pile sinking, the sharp corner is easy to damage due to impact force; the smooth corner reduces impact damage and improves the reliability of the pile body during construction.

[0027] Material and surface treatment: all parts are made of high-strength steel. The surface is coated with epoxy resin or hot-dipped galvanized layer to prevent underwater corrosion.

[0028] During pile sinking, the guide cone surface 2 first enters the soil layer, and the pile body 1 is gradually pressed into the soil.

[0029] The design of the bionic snake scale in the present application simulates the gripping characteristics of the scales on the ground when the snake moves. The optimized shape of the scale makes the pile body have better anti-pulling and anti-overturning capabilities in the soil; compared with the design without scales, this design can reduce the damage and deformation of the photovoltaic pile foundation; in the case of soil settlement or liquefaction, the bionic scale design can stabilize the pile body, reduce the inclination or cracking of the pile body caused by foundation deformation, and reduce the maintenance cost in the later period.

[0030] The present application is integrally formed without welding joints, and the anti-pulling and anti-overturning forces are more evenly distributed. Due to its use environment, the integrally designed corrosion resistance is superior, suitable for high-corrosion environments; the manufacturing and construction process is simple, suitable for large-scale production and rapid construction, which can reduce material waste and reduce life cycle cost.

[0031] The present application uses high-strength steel and increases a corrosion-resistant coating (such as epoxy resin or hot-dipped galvanizing) on the surface. The coating design can resist high-corrosion environments such as fish ponds, prolonging the service life of the pile body. The surface treatment and overall structure optimization reduce the long-term maintenance requirements, and compared with the traditional pile design, the maintenance cost is reduced by about 30%.

[0032] In order to verify the effect of the present application, simulation experiments are carried out on the imitated snake scale pile foundation and the smooth pile, respectively obtaining the deformation (displacement) nephogram of the anti-pulling finite element simulation of the imitated snake scale pile foundation and the smooth pile and the time curve of the anti-pulling finite element simulation of the pile top counterforce, as shown in Figure 4 、 Figure 5 、 Figure 6 and Figure 7 . The experiment shows that the counterforce-time curve difference: the imitated snake scale pile foundation can resist greater uplift force under the same loading displacement or working condition, and the anti-pulling bearing capacity is superior to that of the smooth pile; the stress (or displacement) distribution nephogram: the stress (or displacement) concentration area of the smooth pile is relatively simple, and the contact surface of the soil and the pile is relatively smooth, resulting in that the bearing mainly relies on the friction resistance; the imitated snake scale pile foundation has "scales" or protrusions on the outer surface, not only providing a larger friction resistance around the pile, but also increasing the "mechanical biting effect", so that the local soil stress distribution is more complex, but the overall bearing capacity is improved. Therefore, in terms of the maximum anti-pulling force and the pile-soil coupling effect, the imitated snake scale pile foundation performs better than the smooth pile in the uplift working condition, and is suitable for occasions with higher requirements for anti-pulling bearing capacity.

Claims

1. A fish-scale-imitating pile foundation for the construction of a fish-light complementary photovoltaic power station, characterized in that, The pile body, the guide cone surface located at the front end pile tip of the pile body, and the bionic snake scale wrapped around the pile body, the bionic snake scale is sequentially formed with a sparse scale section and a dense scale section along the pile body from bottom to top, the cross-sectional shape of the bionic snake scale is inverted conical, and the part of the bionic snake scale close to the pile tip is narrower than the part close to the pile body.

2. The imitative-skin-pyton-pile foundation for the construction of fish and light complementary photovoltaic power station according to claim 1, characterized in that, The height H of the bionic snake scale is 10-15 times the width L of the bionic snake scale.

3. The imitative-skin-pyton-pile foundation for the construction of fish and light complementary photovoltaic power station according to claim 2, characterized in that, The width L of the bionic snake scale is 50-100 mm.

4. The imitative-skin-pyton-pile foundation for the construction of fish and light complementary photovoltaic power station according to claim 1, characterized in that, The scale inclination angle of the sparse scale section is smaller than that of the dense scale section.

5. The fishlight complementary photovoltaic power station construction imitating snake scale pile foundation according to claim 1, characterized in that, The length of the dense scale section is greater than that of the sparse scale section.

6. The fishlight complementary photovoltaic power station construction imitating snake scale pile foundation according to claim 1, characterized in that, The pile body and the bionic snake scale are integrally formed.

7. The fishlight complementary photovoltaic power station construction imitating snake scale pile foundation according to claim 1, characterized in that, The guide cone surface is connected with the bottom end of the pile body 1 by welding or integral forming, and forms a smooth transition.

8. The fishlight complementary photovoltaic power station construction imitating snake scale pile foundation according to claim 1, characterized in that, The pile body is a hollow tubular structure.

9. The fishlight complementary photovoltaic power station construction imitating snake scale pile foundation according to claim 1, characterized in that, The tail end of the pile body has a pile body round section.

10. The fishlight complementary photovoltaic power station construction imitating snake scale pile foundation according to claim 1, characterized in that, The surfaces of the pile body, the guide cone surface and the bionic snake scale are coated with an epoxy resin or a hot-dip galvanized layer.

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