Photovoltaic support pile foundation and construction method

Abstract

The invention relates to the field of photovoltaic supports, in particular to a photovoltaic support pile foundation and a construction method, and aims to solve the problem that an existing photovoltaic support pile foundation is difficult to adapt to a liquefied soil stratum. In order to achieve the purpose, the photovoltaic support pile foundation comprises a pile body and a reinforcing device, the pile body is provided with a cavity formed along the axis, an open hole is formed in the side wall of the pile body in the radial direction, and the open hole communicates with the cavity and the outer side of the pile body; the reinforcing device comprises a fixing part and a telescopic assembly, and the telescopic assembly is installed on the fixing part and can stretch out and draw back in the radial direction of the fixing part relative to the fixing part; when the reinforcing device is in the contraction state, the reinforcing device can be contained in the cavity and can move along the axis of the pile body. And when the reinforcing device is in an open state, the telescopic assembly can extend out of the outer side of the pile body from the open hole, so that the lateral bearing capacity of the pile foundation in liquefied soil is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic brackets, and specifically provides a photovoltaic bracket pile foundation and a construction method. Background Art

[0002] With the development of the photovoltaic industry, the application scenarios of photovoltaic brackets are becoming more and more extensive. In the installation of ground photovoltaics, the distribution of soil layers varies with different application scenarios. According to the water content of the soil layer, the soil layer can be divided into plain fill, mixed fill, silt, clay, silty clay, sand, coarse sand, gravel and liquefied soil. The density, plastic limit, liquid limit, compression coefficient, compression modulus, cohesion and internal friction angle of different types of soil layers are different.

[0003] Among them, liquefied soil and silt soil with high water content usually have poor lateral bearing capacity due to the large geometric differences in the bearing capacity, active earth pressure and passive earth pressure of the soil layer, and the pile foundation has poor anti-deformation ability in liquefied soil. When the photovoltaic support is subjected to lateral forces (such as wind loads or lateral support loads), the deformation of the pile foundation in liquefied soil and silt soil is large. After repeated loading and unloading, fatigue damage is prone to occur, resulting in uneven settlement of the photovoltaic support.

[0004] Therefore, there is an urgent need for a photovoltaic support pile foundation to solve the problem that the existing photovoltaic support pile foundation is difficult to adapt to the existence of liquefied soil layers. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing photovoltaic support pile foundation is difficult to adapt to the existence of liquefied soil layers.

[0006] In a first aspect, the present invention provides a photovoltaic bracket pile foundation, comprising: at least one section of a pile body, the pile body having a cavity arranged along an axis, the side wall of the pile body having an opening radially opened, the opening connecting the cavity with the outside of the pile body; a reinforcement device, comprising a fixed portion and a telescopic component, the telescopic component is installed on the fixed portion and can be telescoped relative to the fixed portion in the radial direction of the fixed portion; when the reinforcement device is in a contracted state, the reinforcement device can be accommodated in the cavity and can move along the axis of the pile body; when the reinforcement device is in an open state, the telescopic component can extend from the opening to the outside of the pile body.

[0007] In some exemplary embodiments, the telescopic assembly includes a sleeve, at least one telescopic member and a driving structure, the outermost telescopic member is inserted into the sleeve, and the driving structure can drive the innermost telescopic member to extend to drive all the telescopic members to extend.

[0008] In some exemplary embodiments, the driving structure includes a first elastic member, one end of which is connected to the fixed portion, and the other end is connected to the innermost telescopic member; when the telescopic assembly is in a contracted state, the first elastic member is in a compressed state.

[0009] In some exemplary embodiments, the telescopic assembly further includes a telescopic wing and a second elastic member; the innermost telescopic member is provided with a first accommodating groove along the axial direction, and the first accommodating groove penetrates the telescopic member along at least one radial direction; one end of the telescopic wing close to the fixed portion is located in the first accommodating groove and is rotatably connected to the innermost telescopic member, so that the telescopic wing can be accommodated in the first accommodating groove; the second elastic member is located in the first accommodating groove, and one end is connected to the innermost telescopic member, and the other end is connected to the telescopic wing, so as to drive the telescopic wing to pop out of the first accommodating groove.

[0010] In some exemplary embodiments, a guide groove is formed on the inner side wall of the pile body along the axis, and when the reinforcement device is placed in the cavity, the fixing portion or an end portion of at least one of the telescopic components is located in the guide groove.

[0011] In some exemplary embodiments, the pile foundation further includes a pushing plate, which can be accommodated in the cavity and move relative to the axis of the pile body, and the reinforcement device is detachably connected to the bottom of the pushing plate.

[0012] In some exemplary embodiments, the inner side wall of the pile body is provided with a guide groove along the axis, and the pushing plate is provided with a protrusion that cooperates with the guide groove.

[0013] In some exemplary embodiments, a second receiving groove is provided on the inner circumference of the pile body, and the opening is provided on the circumference where the second receiving groove is located; a tubular valve plate is provided in the second receiving groove, and the valve plate can move in the second receiving groove along the axial direction of the pile body to open or close the opening.

[0014] In some exemplary embodiments, the pile foundation further includes a soil layer discriminator, which is cylindrical and installed on the periphery of the pile body; the interior of the soil layer discriminator is hollow to form a accommodating cavity, a weighing unit is arranged at the bottom of the accommodating cavity, and a plurality of mesh grids are arranged on the outer peripheral wall of the soil layer discriminator, the mesh grids can block the soil layer and allow liquid to flow through, and the liquid flowing into the accommodating cavity is weighed by the weighing unit; and / or a threaded sheet is arranged on the periphery of the pile body.

[0015] In a second aspect, the present disclosure provides a construction method for a photovoltaic support pile foundation, comprising: inserting the pile body into a soil layer; obtaining the depth of the liquefied soil; placing the reinforcement device in a contracted state into the cavity, and moving downward along the axis of the pile body to an opening at the depth of the liquefied soil, unfolding the reinforcement device, and extending the telescopic component from the opening to the outside of the pile body.

[0016] In some exemplary embodiments, a soil layer discriminator is arranged on the periphery of the pile body, the soil layer discriminator is cylindrical and hollow inside to form a accommodating cavity, a weighing unit is arranged at the bottom of the accommodating cavity, and a plurality of mesh grids are arranged on the outer peripheral wall of the soil layer discriminator, the mesh grids can block the soil layer and allow liquid to flow through, and the liquid flowing into the accommodating cavity is weighed by the weighing unit; obtaining the depth of the liquefied soil includes: after the pile body is inserted into the soil layer for a preset time, obtaining the weight of the liquid weighed by each soil layer discriminator; judging in turn whether the weight of the liquid weighed by each soil layer discriminator is greater than the preset weight; if the weight of the liquid weighed by the soil layer discriminator is greater than the preset weight, then there is liquefied soil between the soil layer discriminator and the soil layer discriminator adjacent to it, thereby obtaining the depth of the liquefied soil.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention provides a photovoltaic bracket pile foundation comprising a pile body and a reinforcement device, wherein the pile body has a cavity arranged along an axis, and a side wall of the pile body is provided with an opening in a radial direction, wherein the opening communicates the cavity with the outer side of the pile body; the reinforcement device comprises a fixed part and a telescopic component, wherein the telescopic component is installed on the fixed part and can be telescoped relative to the fixed part in a radial direction of the fixed part; when the reinforcement device is in a contracted state, the reinforcement device can be accommodated in the cavity and can be moved along the axis of the pile body; when the reinforcement device is in an extended state, the telescopic component can be extended from the opening to the outer side of the pile body, so as to enhance the lateral bearing capacity of the pile foundation in liquefied soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a front view of a pile foundation provided by at least one embodiment of the present disclosure;

[0021] Figure 2 is a front view of a pile foundation provided by at least one embodiment of the present disclosure with a reinforcement device deployed;

[0022] Figure 3 is a schematic diagram of a reinforcement device provided by at least one embodiment of the present disclosure in a contracted state;

[0023] Figure 4is a schematic diagram of a reinforcement device provided by at least one embodiment of the present disclosure in an open state;

[0024] Figure 5 yes Figure 3 The cross section along line AA;

[0025] Figure 6 yes Figure 4 The cross section along line BB;

[0026] Figure 7 is a top view of a pile foundation provided by at least one embodiment of the present disclosure;

[0027] Figure 8 yes Figure 2 A cross-section along line CC in the middle;

[0028] Fig. 9 yes Figure 2 Another cross-section along line CC;

[0029] Fig.10 is a schematic diagram of a soil layer discriminator provided by at least one embodiment of the present disclosure;

[0030] Fig.11 yes Fig.10 Cross-section along line DD.

[0031] Description of reference numerals:

[0032] 1. Pile body; 11. Threaded sheet; 12. Cavity; 13. Opening; 14. Guide groove; 15. Second accommodating groove; 16. Valve plate; 2. Pile shoe; 3. Pile cap; 4. Reinforcement device; 41. Fixing part; 42. Telescopic assembly; 421. Sleeve; 422. Telescopic member; 4221. First accommodating groove; 4222. First pin shaft; 424. Telescopic wing; 4241. Second pin shaft; 425. Second elastic member; 426. Rotating shaft; 43. Driving structure; 431. Bracket; 5. Push plate; 51. Protrusion; 6. Soil layer discriminator; 61. Accommodating cavity; 62. Grid; 63. Weighing unit; 7. Indicator light. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present disclosure and are not intended to limit the protection scope of the present disclosure.

[0034] It should be noted that in the description of the present disclosure, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0036] In order to solve the problem that the existing photovoltaic support pile foundation is difficult to adapt to the existence of liquefied soil layers, the present disclosure provides a photovoltaic support pile foundation and a construction method.

[0037] like Figure 1 As shown, the photovoltaic support pile foundation includes a pile body 1, a pile shoe 2 and a pile cap 3. The pile body 1 includes at least one section. When the pile body 1 includes multiple sections, two adjacent pile bodies 1 are connected by threads. The pile body 1 can be inserted into the soil layer by a thread press. In some examples, a threaded sheet 11 is provided on the periphery of the pile body 1, which can reduce the friction between the pile body 1 and the soil, thereby reducing the construction difficulty and saving construction time; in addition, after the pile body 1 is inserted into the soil layer, the soil below the threaded sheet 11 can exert soil reaction force on the threaded sheet 11, and can also improve the bearing capacity of the pile body 1. The pile shoe 2 is fixed to the bottom end of the lowest pile body 1, and adopts an inverted hammer-shaped steel material, which can reduce the difficulty of construction and improve construction efficiency. A threaded sheet 11 can also be provided on the periphery of the pile shoe 2 to reduce the difficulty of construction. During the piling process, the pile cap 3 is fixed on the top of the uppermost pile body 1. As the piling depth increases, the number of pile bodies 1 increases. At this time, the pile cap 3 needs to be removed and the pile body 1 needs to be added. Then the pile cap 3 is connected to the top of the newly added pile body 1 to continue the piling operation.

[0038] In the specific example of the present disclosure, the pile body 1 is configured to have two sections, but this is not a specific limitation of the present disclosure. Without departing from the principle of the present disclosure, the pile body 1 may also be configured to have three sections or more.

[0039] like Figure 1 and Figure 2As shown, the pile body 1 has a cavity 12 arranged along the axis, and a side wall of the pile body 1 is radially provided with an opening 13 , which connects the cavity 12 with the outer side of the pile body 1 .

[0040] like Figure 2 As shown, the photovoltaic support device also includes a reinforcement device 4. Figure 3 As shown, the reinforcement device 4 includes a fixed portion 41 and a telescopic component 42. The telescopic component 42 is installed on the fixed portion 41 and can be retracted relative to the fixed portion 41 along the radial direction of the fixed portion 41. When the reinforcement device 4 is in a contracted state, the reinforcement device 4 can be accommodated in the cavity 12, so as to move along the axis of the pile body 1 in the cavity 12 to the position where the opening 13 is located. When the reinforcement device 4 is in an open state, the telescopic component 42 can extend from the opening 13 to the outside of the pile body 1 and be inserted into the liquefied soil to enhance the lateral bearing capacity of the pile body 1 in the liquefied soil and reduce the deformation of the pile body 1 in the liquefied soil.

[0041] When the reinforcement device 4 is placed in the cavity 12 of the pile body 1, the end of the telescopic component 42 in the compressed state abuts against the inner wall of the pile body 1. As the reinforcement device 4 moves downward along the axial direction of the pile body 1, when the reinforcement device 4 moves to the height of the opening 13, the telescopic component 42 is naturally released and inserted into the opening 13, and extends from the opening 13 to the outside of the pile body 1 and inserted into the soil layer.

[0042] like Figure 4 and Figure 5 As shown, the telescopic assembly 42 includes a sleeve 421, at least one telescopic member 422, and a driving structure 43. When the telescopic member 422 is multi-section, the diameter of each telescopic member 422 is different, and between two adjacent telescopic members 422, the telescopic member 422 with a smaller diameter is inserted into the telescopic member 422 with a larger diameter; and between two adjacent telescopic members 422, the inner diameter of the first end of the outer telescopic member 422 is greater than the inner diameter of the second end, and the outer diameter of the first end of the inner telescopic member 422 is greater than the inner diameter of the second end and smaller than the inner diameter of the first end, so that the first end of the inner telescopic member 422 can be inserted into the first end of the outer telescopic member 422 and is limited by the second end of the outer telescopic member 422, so as to realize the telescoping of the two telescopic members 422.

[0043] In a specific example of the present disclosure, the telescopic member 422 is set as one section, the outer peripheral surface of the telescopic member 422 is a conical surface, and the inner peripheral surface of the sleeve 421 is also a conical surface. However, this is not a specific limitation of the present disclosure. In other embodiments, the telescopic section can be set as two sections or more. At this time, the outermost telescopic member 422 is inserted into the sleeve 421, the outer diameter of the first end of the outermost telescopic member 422 is greater than the outer diameter of the second end, the inner diameter of the sleeve 421 is smaller than the outer diameter of the first end of the outermost telescopic member 422 and greater than the outer diameter of the second end, and the second end of the outermost telescopic member 422 is inserted into the sleeve 421. When the outermost telescopic member 422 is extended, the outer side wall of the first end contacts the inner side wall of the sleeve 421 to limit the continued extension of the outermost telescopic member 422, so as to ensure that the outermost telescopic member 422 will not be separated from the sleeve 421 and can be freely extended.

[0044] like Figure 5 As shown, the driving structure 43 is arranged on the fixed part 41 to drive the innermost telescopic member 422 to extend. As the innermost telescopic member 422 extends, the adjacent telescopic members 422 are driven to extend in sequence until all the telescopic members 422 are extended section by section. In a specific example of the present disclosure, the driving structure 43 includes a first elastic member, such as a spring, one end of the first elastic member is connected to a bracket 431 arranged on the inner side of the fixed part 41, and the other end is connected to the innermost telescopic member 422. When the telescopic assembly 42 is in a contracted state, the first elastic member is in a compressed state. When the first elastic member is in a compressed state, the elastic force generated can push the innermost telescopic member 422 to move in a direction away from the fixed member.

[0045] The innermost telescopic member 422 may be made into a solid structure to enhance its structural strength.

[0046] Some possible examples include Figure 4 and Figure 6 As shown, the telescopic assembly 42 further includes a telescopic wing 424 and a second elastic member 425. The innermost telescopic member 422 has a first accommodating groove 4221 along its axial direction, and the first accommodating groove 4221 penetrates the telescopic member 422 along at least one radial direction of the telescopic member 422.

[0047] One end of the telescopic wing 424 close to the fixed portion 41 is located in the first accommodating groove 4221, and is rotatably connected to the innermost telescopic member 422 via the rotating shaft 426. After the telescopic wing 424 rotates relative to the innermost telescopic member 422, it can be completely accommodated in the first accommodating groove 4221 to avoid affecting the telescopic movement between the innermost telescopic member 422 and the adjacent telescopic member 422. The second elastic member 425 is located in the first accommodating groove 4221, and one end is connected to the innermost telescopic member 422, and the other end is connected to the telescopic wing 424. When the telescopic wing 424 is located in the first accommodating groove 4221, the second elastic member 425 is in a compressed state, and the elastic force provided by the second elastic member 425 can drive the telescopic wing 424 to rotate relative to the innermost telescopic member 422 to pop out of the first accommodating groove 4221.

[0048] When the innermost telescopic member 422 is in the telescopic state, the telescopic wing 424 is abutted and limited by the adjacent telescopic member 422, so that the telescopic wing 424 is located in the first accommodation groove 4221. As the innermost telescopic member 422 gradually extends relative to the adjacent telescopic member 422, the telescopic wing 424 is gradually released, and under the elastic force of the second elastic member 425, it rotates relative to the innermost telescopic member 422, gradually disengages from the first accommodation groove 4221, and thus unfolds. After unfolding, the telescopic wing 424 is in a horizontal state, so as to further enhance the lateral bearing capacity of the pile body 1 in the liquefied soil.

[0049] Specifically, the telescopic member 422 is provided with a first pin 4222, which is inserted from the outer periphery of the telescopic member 422 and extends into the first receiving groove 4221. The telescopic wing 424 is provided with a second pin 4241. Both ends of the second elastic member 425 are respectively connected to the first pin 4222 and the second pin 4241, so as to fix the second elastic member 425.

[0050] For example, in the example disclosed herein, the first accommodating groove 4221 penetrates the telescopic member 422 in both radial directions of the telescopic member 422 , and two telescopic wings 424 are disposed in the first accommodating groove 4221 , and the two telescopic wings 424 are unfolded in opposite directions.

[0051] like Figure 7 As shown, the inner wall of the pile body 1 is provided with a guide groove 14 along the axis, and the guide groove 14 may be one or more.

[0052] In some examples, such as Figure 7 As shown, the pile foundation further includes a push plate 5, which can be accommodated in the cavity 12 and move relative to the axis of the pile body 1. The reinforcement device 4 is detachably connected to the bottom of the push plate 5, such as by snap connection, magnetic attraction, etc. For example, the push plate 5 is specifically pushed by the hydraulic rod of the pile foundation to move back and forth and be reused.

[0053] The push plate 5 is provided with a protrusion 51 that cooperates with the guide groove 14, so that the push plate 5 will not rotate and change the angle during the downward movement along the axis of the pile body 1, ensuring that the reinforcement device 4 connected to the bottom of the push plate 5 will not change the angle. When the push plate 5 drives the reinforcement device 4 to move to the height of the opening 13, the telescopic assembly 42 can be inserted into the opening 13 and extend from the opening 13 to the outside of the pile body 1.

[0054] In other examples, when the reinforcement device 4 is placed in the cavity 12, the end of the fixing portion 41 or at least one telescopic component 42 is located in the guide groove 14. When the reinforcement device 4 moves downward along the axis of the pile body 1 in the cavity 12, the movement of the reinforcement device 4 can be guided by the cooperation between the fixing portion 41 or the telescopic component 42 and the guide groove 14, so that the angle of the reinforcement device 4 will not change during the movement, and the direction of the telescopic component 42 in the reinforcement device 4 can be aligned with the opening direction of the opening 13. When the reinforcement device 4 moves to the height of the opening 13, the telescopic component 42 can be inserted into the opening 13 and extend from the opening 13 to the outside of the pile body 1.

[0055] In some examples, such as Figure 8 and Fig. 9 As shown, the inner circumference of the pile body 1 is provided with a second accommodating groove 15, and the opening 13 is provided on the circumference where the second accommodating groove 15 is located. A tubular valve plate 16 is provided in the second accommodating groove 15. In the axial direction of the pile body 1, the height of the second accommodating groove 15 is higher than the height of the valve plate 16, so that the valve plate 16 can move relative to the pile body 1 to close or open the opening 13. In the initial state, the valve plate 16 closes the opening 13. When the opening 13 needs to be opened, the valve plate 16 can be moved relative to the pile body 1.

[0056] In some examples, such as Figure 2 As shown, the pile foundation further includes a soil layer discriminator 6, which is cylindrical and installed on the outer periphery of the pile body 1. The soil layer discriminator 6 is mainly used to determine whether there is liquefied soil in the soil layer and the approximate depth of the liquefied soil, so as to add a reinforcement device 4 in the liquefied soil and improve the lateral bearing capacity of the pile body 1 in the liquefied soil.

[0057] Specifically, Fig.10 and Fig.11As shown, the interior of the soil layer discriminator 6 is hollow to form a receiving chamber 61, and the outer peripheral wall of the soil layer discriminator 6 is provided with a plurality of mesh grids 62, which can block large particles of soil and allow liquid (such as water) to flow through. A weighing unit 63 is provided at the bottom of the receiving chamber 61, and the liquid flowing into the receiving chamber 61 can be weighed by the weighing unit 63. If the amount of liquid entering the receiving chamber 61 exceeds a preset value, it indicates that liquefied soil exists in the soil layer above the soil layer discriminator 6. When multiple soil layer discriminators 6 are provided, if the amount of liquid flowing into a soil layer discriminator 6 reaches a preset value, it indicates that liquefied soil exists in the soil layer between the soil layer discriminator 6 and the soil layer discriminator 6 adjacent to it.

[0058] Of course, due to the large number of pile foundations, some pile foundations are located in soil layers where there is no liquefied soil. In order to facilitate the staff to quickly identify which pile foundations are located in soil layers where there is liquefied soil, such as Figure 2 As shown, the pile foundation can also be provided with an indicator light 7, which is electrically connected to the soil layer discriminator 6. When the amount of liquid entering any soil layer discriminator 6 exceeds a preset value, the indicator light 7 will light up to indicate that liquefied soil exists in the soil layer where the pile body 1 is located.

[0059] The present disclosure also provides a construction method for a photovoltaic support pile foundation, comprising the following steps:

[0060] S1. Insert the pile bodies 1 in the pile foundation into the soil layer one by one. A pile shoe 2 is installed at the bottom of the lowest pile body 1. During the piling process, a pile cap 3 is installed on the top of the uppermost pile body 1. As the uppermost pile body 1 is gradually driven into the soil layer, the pile cap 3 needs to be removed, and a section of the pile body 1 is installed on the top. Then, the pile cap 3 is installed on the top of the installed pile body 1, and the piling is continued until the designed depth. Specifically, a threaded pile driver can be used for piling. The threaded pile driver can drive the pile body 1 to rotate and continuously press the pile body 1 downward to improve construction efficiency.

[0061] S2. Obtain the depth of liquefied soil.

[0062] In some examples, when the soil layers are distributed relatively evenly, sampling can be used to determine the distribution of the soil layers and to roughly determine whether liquefied soil exists and the depth of the liquefied soil.

[0063] In other examples, the depth of the liquefied soil is determined by using a soil layer discriminator 6 disposed on the periphery of the pile body 1. Specifically, the depth includes:

[0064] After the pile driving is completed, the pile foundation is left to stand for a preset time (e.g., 1 to 2 hours). During the standing period, the water in the soil layer will gradually flow along the pile foundation into the soil layer discriminator 6, and the water will be weighed by the weighing unit 63 in the soil layer discriminator 6 to obtain the liquid weight weighed by each soil layer discriminator 6, and then judge in turn whether the liquid weight weighed by each soil layer discriminator 6 is greater than the preset weight. If the liquid weight weighed by a soil layer discriminator 6 is greater than the preset weight, it means that the water content in the soil layer above the soil layer discriminator 6 is high and there is liquefied soil. It can be roughly judged that there is liquefied soil between the soil layer discriminator 6 and the adjacent soil layer discriminator 6 above, so as to obtain the approximate depth of the liquefied soil.

[0065] S3, put the reinforcement device 4 in the contracted state into the cavity 12, move it downward along the axis of the pile body 1 to the opening 13 at the depth of the liquefied soil, unfold the reinforcement device 4, and make the telescopic component 42 extend from the opening 13 to the outside of the pile body 1. The specific steps are:

[0066] S31, first dismantle the pile cap 3, and use a tool to push the valve plate 16 within the depth where the liquefied soil is located to open the opening 13 there.

[0067] S32, the reinforcing device 4 in the compressed state is installed below the pushing plate 5, and then the pushing plate 5 and the reinforcing device 4 are placed in the cavity 12 of the pile body 1, wherein the end of the telescopic component 42 in the compressed state abuts against the inner wall of the pile body 1.

[0068] S33, push the push plate 5 to move downward along the axial direction of the pile body 1 until the reinforcement device 4 moves to the height of the opened opening 13, and the telescopic component 42 is naturally released and inserted into the opening 13, and extends from the opening 13 to the outside of the pile body 1 and inserted into the liquefied soil to enhance the lateral bearing capacity of the pile body 1 in the liquefied soil.

[0069] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A photovoltaic support pile foundation, It is characterized in that include: At least one section of pile body (1), the pile body (1) having a cavity (12) arranged along an axis, a side wall of the pile body (1) having an opening (13) radially opened, the opening (13) communicating the cavity (12) with the outer side of the pile body (1); A reinforcing device (4) comprises a fixing portion (41) and a telescopic assembly (42), wherein the telescopic assembly (42) is mounted on the fixing portion (41) and is capable of telescoping relative to the fixing portion (41) along a radial direction of the fixing portion (41); When the reinforcing device (4) is in a retracted state, the reinforcing device (4) can be accommodated in the cavity (12) and can move along the axis of the pile body (1); when the reinforcing device (4) is in an extended state, the telescopic component (42) can extend from the opening (13) to the outside of the pile body (1).

2. The photovoltaic support pile foundation according to claim 1, It is characterized in that The telescopic assembly (42) comprises a sleeve (421), at least one telescopic member (422) and a driving structure (43); the outermost telescopic member (422) is inserted into the sleeve (421); and the driving structure (43) is capable of driving the innermost telescopic member (422) to extend so as to drive all the telescopic members (422) to extend.

3. The photovoltaic support pile foundation according to claim 2, It is characterized in that The driving structure (43) comprises a first elastic member, one end of which is connected to the fixing portion (41), and the other end of which is connected to the innermost telescopic member (422); when the telescopic assembly (42) is in a contracted state, the first elastic member is in a compressed state.

4. The photovoltaic support pile foundation according to claim 2, It is characterized in that The telescopic assembly (42) further includes a telescopic wing (424) and a second elastic member (425); The innermost telescopic member (422) is provided with a first accommodating groove (4221) along the axial direction, and the first accommodating groove (4221) penetrates the telescopic member (422) along at least one radial direction; One end of the telescopic wing (424) close to the fixed portion (41) is located in the first accommodating groove (4221) and is rotatably connected to the innermost telescopic member (422), so that the telescopic wing (424) can be accommodated in the first accommodating groove (4221); The second elastic member (425) is located in the first accommodating groove (4221), and one end is connected to the innermost telescopic member (422), and the other end is connected to the telescopic wing (424) to drive the telescopic wing (424) to pop out of the first accommodating groove (4221).

5. The photovoltaic support pile foundation according to claim 1, It is characterized in that The inner side wall of the pile body (1) is provided with a guide groove (14) along the axis, and when the reinforcement device (4) is placed in the cavity (12), the end of the fixing portion (41) or at least one of the telescopic components (42) is located in the guide groove (14).

6. The photovoltaic support pile foundation according to claim 1, It is characterized in that The pile foundation further comprises a pushing plate (5), the pushing plate (5) being capable of being accommodated in the cavity (12) and being movable relative to the axis of the pile body (1), and the reinforcing device (4) being detachably connected to the bottom of the pushing plate (5).

7. The photovoltaic support pile foundation according to claim 6, It is characterized in that The inner side wall of the pile body (1) is provided with a guide groove (14) along the axis, and the pushing plate (5) is provided with a protrusion (51) that matches the guide groove (14).

8. The photovoltaic support pile foundation according to claim 1, It is characterized in that The inner circumferential surface of the pile body (1) is provided with a second containing groove (15), and the opening (13) is provided on the circumferential surface where the second containing groove (15) is located; A tubular valve plate (16) is arranged in the second containing groove (15), and the valve plate (16) can move in the second containing groove (15) along the axial direction of the pile body (1) to open or close the opening (13).

9. The photovoltaic support pile foundation according to claim 1, It is characterized in that The pile foundation further comprises a soil layer discriminator (6), which is cylindrical and installed on the outer periphery of the pile body (1); The interior of the soil layer discriminator (6) is hollow to form a receiving chamber (61), a weighing unit (63) is arranged at the bottom of the receiving chamber (61), and a plurality of mesh grids (62) are arranged on the outer peripheral wall of the soil layer discriminator (6), the mesh grids (62) are capable of blocking the soil layer and allowing liquid to flow through, and the liquid flowing into the receiving chamber (61) is weighed by the weighing unit (63); and / or, The outer periphery of the pile body (1) is provided with a threaded sheet (11).

10. A construction method for a photovoltaic support pile foundation according to any one of claims 1 to 9, It is characterized in that include: Inserting the pile body (1) into the soil layer; Get the depth of liquefied soil; The reinforcing device (4) in a contracted state is placed in the cavity (12) and moved downward along the axis of the pile body (1) to the opening (13) at the depth of the liquefied soil, and the reinforcing device (4) is unfolded so that the telescopic component (42) extends from the opening (13) to the outside of the pile body (1).

11. The construction method of the photovoltaic support pile foundation according to claim 10, It is characterized in that A soil layer discriminator (6) is arranged on the periphery of the pile body (1); the soil layer discriminator (6) is cylindrical and hollow inside to form a receiving cavity (61); a weighing unit is arranged at the bottom of the receiving cavity (61); a plurality of mesh grids (62) are arranged on the peripheral wall of the soil layer discriminator (6); the mesh grids (62) can block the soil layer and allow liquid to flow through; the liquid flowing into the receiving cavity (61) is weighed by the weighing unit; Get the depth of liquefied soil, including: After the pile body is inserted into the soil layer for a preset time, the weight of the liquid measured by each soil layer discriminator (6) is obtained; determining in sequence whether the liquid weight measured by each soil layer discriminator (6) is greater than a preset weight; If the liquid weight measured by the soil layer discriminator (6) is greater than the preset weight, liquefied soil exists between the soil layer discriminator (6) and the soil layer discriminator (6) adjacent to the soil layer discriminator (6) above, thereby obtaining the depth of the liquefied soil.

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