Cable-stayed pile and photovoltaic support

Abstract

The invention provides a cable-stayed pile and a photovoltaic support, and relates to the technical field of photovoltaics. The cable-stayed pile comprises a plurality of pile sections which are connected in sequence; in any two adjacent pile sections, the radial size of the top end of the lower pile section is larger than that of the bottom end of the upper pile section, so that an anti-pulling occlusion interface is formed at the joint of any two adjacent pile sections, and the mechanical interlocking effect of soil particles and the surface of the cable-stayed pile can be improved; the uplift bearing capacity and the anti-overturning capacity of the cable-stayed pile can be enhanced, the uplift capacity is enhanced through the phosphorous portions on the surfaces of the pile sections, and the cable-stayed pile is particularly suitable for a photovoltaic flexible support built in a steep mountain land to bear cable-stayed loads of the photovoltaic flexible support.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a cable-stayed pile and a photovoltaic support structure. Background Technology

[0002] Photovoltaic flexible support systems require the connection of stay cables and stay piles to balance sway loads. However, currently used stay pile structures (including precast concrete pile foundations and cast-in-place pile foundations) generally suffer from insufficient tensile strength and poor structural stability, making them prone to tilting or even overturning. Theoretically, increasing the cross-sectional size of the stay piles or using deep pile structures can effectively improve their tensile stability. However, in practical engineering applications, especially in the steep mountainous environments where flexible supports are currently mainly constructed, the size of the construction work area directly affects construction costs and schedules. If the solution of increasing the size of the stay piles is adopted, large-scale piling equipment must be used, which will not only significantly increase the difficulty of leveling the mountainous site but also significantly increase the overall complexity of the construction. Summary of the Invention

[0003] The purpose of this invention is to provide a cable-stayed pile and a photovoltaic support to alleviate the technical problems of cable-stayed piles in the prior art, such as the difficulty of construction due to site limitations and the low pull-out bearing capacity.

[0004] In a first aspect, the inclined pile provided by the present invention includes multiple pile segments, which are connected sequentially. In any two adjacent pile segments, the radial dimension of the top end of the lower pile segment is greater than the radial dimension of the bottom end of the upper pile segment, so that an anti-pull-out interlocking interface is formed at the connection between any two adjacent pile segments.

[0005] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the radial dimension of each pile segment decreases from top to bottom.

[0006] In conjunction with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein each pile segment has at least one set of scale-like portions on its surface.

[0007] In conjunction with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein multiple sets of the scale-like portions are staggered on a projection plane perpendicular to the axis of the pile segment.

[0008] In conjunction with the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the bottom of the lowest pile segment is connected to a transition section, and the lower end of the transition section is provided with a pile head.

[0009] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the ratio of the length of the inclined pile to the diameter of the pile is 8 to 20.

[0010] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the number of pile segments is 3 to 8.

[0011] In conjunction with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the ratio of the length of each pile segment to the length of the inclined pile is 1 / 10 to 1 / 3.

[0012] In conjunction with the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the ratio of the radial dimension of the pull-out interlocking interface to the diameter of the inclined pile is 1 / 15 to 1 / 5.

[0013] Secondly, the photovoltaic support provided by the present invention is equipped with the inclined piles described in the first aspect.

[0014] The embodiments of the present invention bring the following beneficial effects: by using multiple pile segments connected in sequence, in any two adjacent pile segments, the radial dimension of the top end of the lower pile segment is greater than the radial dimension of the bottom end of the upper pile segment, so that an anti-pull-out interlocking interface is formed at the connection of any two adjacent pile segments, which can increase the mechanical interlocking effect between soil particles and the surface of the inclined pile, which is beneficial to enhancing the pull-out bearing capacity and overturning resistance of the inclined pile.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a stay-stayed pile provided in an embodiment of the present invention; Figure 2 This is a front view of a cable-stayed pile provided in an embodiment of the present invention; Figure 3 This is a front view of a pile segment of a cable-stayed pile provided in an embodiment of the present invention; Figure 4A schematic diagram of the projection of a pile segment of a cable-stayed pile on a projection plane perpendicular to the axis provided in an embodiment of the present invention; Figure 5 This is a partially enlarged schematic diagram of a cable-stayed pile provided in an embodiment of the present invention.

[0018] Icons: 100 - Segment; 101 - Scale pattern; 200 - Anti-pull-out interlocking interface; 300 - Transition segment; 400 - Segment head. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used only to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figure 1 and Figure 2 As shown, the inclined pile provided in this embodiment of the invention includes multiple pile segments 100, which are connected in sequence. In any two adjacent pile segments 100, the radial dimension of the top end of the lower pile segment 100 is greater than the radial dimension of the bottom end of the upper pile segment 100, so that an anti-pull-out interlocking interface 200 is formed at the connection of any two adjacent pile segments 100.

[0023] Specifically, the top of the lower pile segment 100 is provided with an outwardly expanding annular flange or an enlarged diameter structure, while the bottom of the upper pile segment 100 is a columnar structure with a smaller diameter. The two are connected by an insertion fit. This structural design allows adjacent pile segments 100 to be axially connected while forming an enlarged diameter step structure at the connection point, thus constituting an anti-pull-out interlocking interface 200.

[0024] The function of the pull-out interlocking interface 200 is as follows: when the inclined pile is subjected to pull-out force, the upper pile segment 100 applies radial and shear forces to the enlarged diameter portion of the lower pile segment 100, thereby forming an effective pull-out interlocking force at the pile segment connection, significantly improving the overall pull-out bearing capacity of the pile body, and preventing the pile body from slipping or breaking under tension conditions.

[0025] In an optional embodiment, to enhance the structural stability and force transmission efficiency of the connection, the pull-out interlocking interface 200 may be provided with a toothed structure, a threaded structure, or a welded reinforcement structure to further improve the interlocking strength and shear resistance between adjacent pile segments. Additionally, a sealing structure or filling material may be provided at the connection of the pile segments 100 to prevent mud and sand from entering and affecting the connection stability.

[0026] During construction, the first pile segment 100 is first driven into the foundation. Then, the second pile segment 100 is inserted into the enlarged diameter end of the previous pile segment with its smaller diameter bottom end, and so on, connecting each segment upwards until the designed pile length is reached. Multiple pile segments 100 can also be configured as a single structure, eliminating the need for assembly and connection during construction, thus improving construction efficiency.

[0027] In this embodiment of the invention, the radial dimension of each pile segment 100 decreases from top to bottom. The multiple pile segments 100 can be configured with the same dimensions, or the maximum diameter of the lower pile segment 100 can be smaller than the maximum diameter of the upper pile segment 100. As the multiple pile segments 100 are inserted into the construction site, they can be used to gradually enlarge the hole, which helps reduce the resistance to downward penetration of the multiple pile segments 100.

[0028] like Figure 1 and Figure 3 As shown, each pile segment 100 has at least one set of scale-like parts 101 on its surface.

[0029] The scale-like texture 101 is distributed along the axial and / or circumferential direction of the pile segment 100 to enhance the lateral friction between the pile and the surrounding soil, thereby improving the overall bearing capacity of the pile foundation. The scale-like texture 101 has a raised texture in its structure, and its cross-section can be selected from geometric shapes such as triangle, trapezoid, semicircle or polygon.

[0030] In optional embodiments, the scale-like portion 101 is arranged continuously or intermittently along the circumference of the pile segment 100. In one embodiment, the scale-like portion 101 is configured with multiple spirally extending lines along the circumference, with a pitch of 50–200 mm, and the spiral direction can be left-handed or right-handed. The spiral arrangement helps guide soil flow during pile driving, reduces construction resistance, and forms a continuous shear-resistant interface after pile completion.

[0031] In another alternative embodiment, the scale-like sections 101 can also be arranged in an array, for example, by providing several annular scale-like bands along the axial direction, each scale-like band containing multiple independent protruding units evenly distributed circumferentially. Each protruding unit has a length of 10–50 mm, a width of 5–15 mm, and a height of 3–12 mm. This discrete design allows for flexible adjustment of density and position according to geological conditions, achieving localized reinforcement.

[0032] Furthermore, the scale-like portion 101 and the pile segment 100 are integrally formed structures, which can be prefabricated in the concrete pile using a mold, or formed on the surface of the steel pile through machining, welding, hot pressing, etc. For precast concrete piles, the scale-like portion 101 is formed by a template with reverse grooves during casting; for steel pipe piles, the scale-like structure can be directly constructed on the surface of the pipe wall through cold rolling, rolling, or laser additive manufacturing processes. In addition, the surface of the scale-like portion 101 can be further treated with micro-roughening or coating, such as sandblasting, scoring, or coating with a high-friction coefficient material (such as epoxy resin mixed with quartz sand), to further improve the interfacial bonding performance with the soil.

[0033] See Figure 4 Multiple sets of scale-like parts 101 are staggered on the projection plane perpendicular to the axis of the pile segment 100, and the stagger angle β between any two adjacent sets of scale-like parts 101 in the circumferential direction can be arbitrarily taken between 0 and 360 degrees.

[0034] In specific applications, when stay-stayed piles are used in soft soil foundations, the scale-like sections 101 are mainly located in the lower middle part of the pile shaft, i.e., the area expected to bear greater lateral friction, thereby optimizing material utilization efficiency. In rock strata or dense sand layers, the scale density or depth can be increased to enhance the embedment effect. By setting at least one set of scale-like sections 101 on the surface of each pile segment 100, the scale-like sections 101 form a snake-belly-like mimicry effect, which facilitates downward penetration construction and enhances upward pull-out resistance, effectively improving the interaction force between the pile and the soil, and improving the bearing characteristics and settlement control capacity of the pile foundation. This is particularly suitable for applications where photovoltaic flexible supports are constructed in steep mountainous areas to bear inclined loads.

[0035] like Figure 1 and Figure 2As shown, the bottom of the lowest pile segment 100 is connected to a transition segment 300, and the lower end of the transition segment 300 is equipped with a pile head 400. The transition segment 300 is made of high-strength steel, and its upper end is fitted and connected to the lower end of the lowest pile segment 100, with the lower end equipped with a pile head 400 with a pointed tip. The pile head 400 is a conical structure or a structure with reinforcing ribs, used to enhance the guidance and bearing capacity of the pile foundation during penetration. Different forms of pile heads 400 can be selected according to geological conditions, such as pointed pile heads suitable for soft soil layers or enlarged-base pile heads suitable for hard rock layers.

[0036] See Figure 2 For inclined tie piles, the ratio of pile length H to pile diameter L is 8 to 20, preferably 10 to 15. For example, when the pile diameter L is 0.6 meters, the pile length H can be selected between 4.8 meters and 12 meters. The specific length should be determined comprehensively based on engineering geological conditions, design loads, and construction conditions. Controlling the ratio of pile length H to pile diameter L within the range of 8 to 20 ensures that the pile has sufficient bearing capacity and stability, while avoiding the problems of increased construction difficulty and cost caused by excessively long piles.

[0037] like Figure 1 and Figure 2 As shown, the number of pile segments 100 is 3 to 8. The length of each pile segment 100 can be selected as 2 meters, 3 meters or 5 meters according to the construction geological conditions and design bearing requirements. Each pile segment 100 is formed by casting high-strength steel reinforcement skeleton and concrete of grade C60 or above. Shear ribs are provided on the outer surface to enhance the frictional resistance with the surrounding soil.

[0038] In optional implementations, when applied to soft soil foundation treatment, a 6-section pile segment 100 is selected, which can meet the requirement of deep penetration into the weak layer and facilitate transportation and hoisting operations; when used for shallow reinforcement or temporary support projects, a 3-section pile segment 100 can be used, which can significantly reduce material costs and construction cycle.

[0039] The ratio of the length h of each 100mm pile segment to the pile length H of the inclined pile is 1 / 10 to 1 / 3. This ratio range is designed based on a comprehensive consideration of construction efficiency, pile stress distribution, and geological adaptability. When h is too small (i.e., the ratio is less than 1 / 10), the number of pile segments increases, leading to more connection structures, which not only increases construction complexity but may also affect the overall bearing capacity of the pile. Conversely, when h is too large (i.e., the ratio exceeds 1 / 3), the length of each pile segment becomes excessively long, increasing the difficulty of transportation and hoisting, and significantly increasing the difficulty of construction operations in an inclined state, which is not conducive to flexible adjustments during on-site construction. Depending on different geological conditions and engineering requirements, the value of the length h of each 100mm pile segment can be flexibly adjusted within the above ratio range.

[0040] See Figure 2 and Figure 5The ratio of the radial dimension b of the pull-out interlocking interface 200 to the pile diameter L of the inclined pile is 1 / 15 to 1 / 5. Specifically, the pile diameter L of the inclined pile is the maximum radial dimension of the pile segment 100, and the radial dimension b of the pull-out interlocking interface 200 refers to the width of the interface protruding outward relative to the bottom end of its adjacent upper pile segment 100. Extensive indoor model tests and field tests have shown that when this ratio is within the range of 1 / 15 to 1 / 5, the pull-out interlocking interface 200 can effectively enhance the frictional resistance and interlocking force between the pile and the surrounding soil, avoiding problems such as insufficient enhancement due to an excessively small interface size, or construction difficulties and decreased structural stability due to an excessively large interface size. Optimized design within this ratio range not only improves the pull-out bearing capacity of the pile but also considers construction feasibility and economy. By optimizing the proportional relationship between the radial dimension b of the pull-out interlocking interface 200 and the pile diameter L of the inclined pile, a structurally reasonable, feasible, and pull-out-resistant inclined pile structure is provided, with good prospects for engineering applications.

[0041] The photovoltaic support provided in this embodiment of the invention is equipped with the inclined tie piles described in the above embodiments. Taking advantage of the easy construction and strong tensile strength of the inclined tie piles, this photovoltaic support is particularly suitable for construction in steep mountainous environments.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A type of inclined-stayed pile, characterized in that, It includes multiple pile segments (100), which are connected sequentially; In any two adjacent pile segments (100), the radial dimension of the top end of the lower pile segment (100) is greater than the radial dimension of the bottom end of the upper pile segment (100), so that an anti-pull-out interlocking interface (200) is formed at the connection of any two adjacent pile segments (100).

2. The inclined-stayed pile according to claim 1, characterized in that, The radial dimension of each pile segment (100) decreases from top to bottom.

3. The inclined-stayed pile according to claim 1, characterized in that, Each pile segment (100) has at least one set of scale-like parts (101) on its surface.

4. The inclined-stayed pile according to claim 3, characterized in that, Multiple sets of the scale-like parts (101) are staggered on the projection plane perpendicular to the axis of the pile segment (100).

5. The inclined-stayed pile according to claim 1, characterized in that, The bottom of the lowest pile segment (100) is connected to a transition section (300), and the lower end of the transition section (300) is provided with a pile head (400).

6. The inclined-stayed pile according to claim 5, characterized in that, The ratio of the length to the diameter of the inclined pile is 8 to 20.

7. The inclined-stayed pile according to claim 5, characterized in that, The number of sections in the pile segment (100) is 3 to 8.

8. The inclined-stayed pile according to claim 7, characterized in that, The length of each pile segment (100) is 1 / 10 to 1 / 3 of the length of the inclined pile.

9. The inclined-stayed pile according to claim 1, characterized in that, The ratio of the radial dimension of the anti-pull-out interlocking interface (200) to the diameter of the inclined pile is 1 / 15 to 1 / 5.

10. A photovoltaic support structure, characterized in that, The photovoltaic support is equipped with the inclined tie piles as described in any one of claims 1 to 9.

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