CN113266033A

CN113266033A - Pile body resistance to plucking subassembly, pile foundation device and photovoltaic power plant

Info

Publication number: CN113266033A
Application number: CN202110565240.6A
Authority: CN
Inventors: 丁银亮; 李二斌
Original assignee: Sungrow Renewables Development Co Ltd
Current assignee: Sungrow Renewables Development Co Ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-08-17

Abstract

The invention discloses a pile body uplift assembly, a pile foundation device and a photovoltaic power station, wherein the pile body uplift assembly comprises a blade group, the blade group comprises blades, and the blade group is provided with a blade closing position where the blades are in a closing state and a blade unfolding position where the blades are in an unfolding state under the action of soil. In the pile body resistance to plucking subassembly that this application provided, because the blade can be the blade exhibition of expansion state under the soil effect and open the position for when the pile body rose, the blade group was automatic to be opened, need not the user and opens the blade group alone, has improved the use convenience of pile foundation device effectively.

Description

Pile body resistance to plucking subassembly, pile foundation device and photovoltaic power plant

Technical Field

The invention relates to the technical field of pile body installation, in particular to a pile body uplift resisting assembly. The invention also relates to a pile foundation device comprising the pile body uplift assembly. The invention also relates to a photovoltaic power station comprising the pile foundation device.

Background

In a large building, for example, in the construction of a large photovoltaic power station, a pile body is generally used as a foundation for supporting a photovoltaic support because of the characteristics of low cost, convenient construction, good mechanical properties and the like.

However, in seasonal frozen soil areas, the pile foundation needs to penetrate the aquifer soil, and when the air temperature is low, the aquifer soil expands. The pile foundation can be pulled up due to frost heaving of the surrounding soil body under the influence of wind suction load or frost heaving of the surrounding soil body of the foundation, so that the upper support structure is unevenly deformed, the support structure is unstable, and the assembly is cracked or even falls off.

In order to improve pile body installation stability, set up pile body resistance to plucking subassembly on the pile body usually, pile body resistance to plucking subassembly is provided with the blade, and in the pile body transfer in-process, the blade is in the blade closed position, after the pile body transfers to preset position, goes deep into the inside blade hookup location of pile body through rotary device, and the control blade is opened and is in the blade exhibition position.

However, the pile body pulling-resistant assembly is installed in the soil, and the situation that the blades are missed to be opened easily exists. Simultaneously because the pile body resistance to plucking subassembly all need just can expand under the effect of external rotary device at every turn, leads to the pile foundation device to use loaded down with trivial details, is not convenient for promote.

Therefore, how to improve the convenience of using the pile foundation device is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a pile body uplift assembly to improve the use convenience of a pile foundation device. Another object of the present invention is to provide a pile foundation device including the above pile body uplift assembly. It is a further object of the present invention to provide a photovoltaic power plant comprising the above pile foundation apparatus.

In order to achieve the purpose, the invention provides a pile body uplift resistant assembly which comprises a blade group, wherein the blade group comprises blades, and the blade group is provided with a blade closing position in which the blades are in a closing state and a blade unfolding position in which the blades are in an unfolding state under the action of soil.

Preferably, each of the blade groups includes a plurality of blades, and the blades of each of the blade groups are annularly arranged.

Preferably, when the blade group is located at the blade closed position, the bottom ends of all the blades form a cone structure close to the axial position of the pile body.

Preferably, when the set of blades is in the blade closed position:

the bottom ends of the cone structures are mutually abutted;

or the bottom end of the cone structure is encircled to form a first soil inlet for soil to enter the blade group;

or the bottom end of the cone structure is used for abutting against the side wall of the pile body;

or the bottom end of the cone structure is used for being arranged in a clearance with the side wall of the pile body.

Preferably, the bottom ends of the blades comprise cuffs, the cuffs of all the blades being closed to form the cone structure.

Preferably, the soil inlet portion of the blade tip is provided with a second soil inlet for soil to enter the interior of the blade assembly.

Preferably, when the vanes are in the vane closed position:

the top end of the soil inlet part is of a sharp-angled structure with a high middle part and low two sides;

or the top end of the soil inlet part is of a V-shaped structure with two high sides and a low middle.

Preferably, the outer wall of the blade is provided with a first limiting protrusion.

Preferably, the upper surface of the first limiting protrusion and the outer wall of the blade form a soil clamping groove capable of containing soil.

Preferably, the pile body further comprises a second limiting bulge for being installed on the side wall of the pile body.

Preferably, the pile body is used for limiting the position of the blade group, and two ends of the middle connecting piece are respectively connected with the blade group and the pile body.

Preferably, still include the pile body spliced pole, the pile body spliced pole is fixed for the pile body, intermediate junction spare install in pile body spliced pole periphery.

Preferably, the vanes are shaped as flat plates, arc-shaped plates or polygonal plates.

A pile foundation device comprises a pile body and a pile body uplift assembly arranged on the pile body.

Preferably, the blades are in a closed condition when the piling device is piling downwards; when the pile foundation device is acted on by upward force, the blades are unfolded under the action of soil.

The utility model provides a photovoltaic power plant, includes the pile foundation device and with installing photovoltaic module on the pile foundation device, the pile foundation device is the aforesaid the pile foundation device.

In the technical scheme, the pile body anti-pulling assembly provided by the invention comprises a blade group, wherein the blade group comprises blades, and the blade group is provided with a blade closing position in which the blades are in a closing state and a blade unfolding position in which the blades are in an unfolding state under the action of soil. When the pile foundation device is installed in the soil process, the blades are located at the blade closing positions, so that the pile body descends to the preset position. When the pile body moved up by external effect, soil got into inside the blade group, the blade strutted the in-process and constantly increased the pressure to soil for the pile foundation can not up remove, and the rising power that the pile foundation received is big more, and the blade is big more to the pressure of soil, and the pile foundation is difficult more to rise.

According to the pile body uplift assembly, the blades can be unfolded under the action of soil, so that when the pile body rises, the blade group is automatically opened, a user does not need to open the blade group independently, and the use convenience of the pile foundation device is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a photovoltaic power station provided in an embodiment of the present invention;

FIG. 2 is a view of a first pile pulling resisting assembly in an installed position with blades closed according to an embodiment of the present invention;

FIG. 3 is an installed position view of the pile body uplift assembly of FIG. 2 in a blade-deployed position;

FIG. 4 is a connection view of the pile pulling assembly of FIG. 2 in an internal configuration;

FIG. 5 is a view of the single blade of FIG. 2 in an installed position;

FIG. 6 is a schematic view of the blade of the pile pulling assembly of FIG. 2;

FIG. 7 is a view of a second embodiment of the pile pulling resisting assembly in the blade closed position;

FIG. 8 is an installed position view of the second piling resistance assembly of FIG. 7 in a blade deployed position;

FIG. 9 is a view of the third anti-uplift assembly of the pile body provided by the embodiment of the invention in an installation position with the blades in a closed position;

FIG. 10 is an installed position view of the third piling resistance pulling assembly shown in FIG. 9 in a blade deployed position;

fig. 11 is a schematic structural diagram of a fourth pile pulling-resistant group in a blade closed position according to an embodiment of the present invention;

fig. 12 is a view of the pile body uplift resistant group of fig. 11 in an installation position with the blades unfolded.

Wherein in FIGS. 1-12:

1. a pile body uplift resistant component; 2. a pile body; 3. a photovoltaic support; 4. a photovoltaic module;

5. a blade; 5-1, a first limiting bulge; 5-2, flanging; 5-3, a soil inlet part;

6. an intermediate connecting member; 6-1, a second connecting part; 6-2, a first connection part; 6-3, a middle connecting rod;

7. mounting a plate; 8. a threaded fastener;

9. a tubular pile end cap; 9-1, a threaded hole;

10. and (4) connecting columns of pile bodies.

Detailed Description

The core of the invention is to provide a pile body uplift assembly to improve the use convenience of a pile foundation device. Another core of the invention is to provide a pile foundation device comprising the pile body uplift assembly. The invention further provides a photovoltaic power plant comprising the pile foundation device.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to 12.

In one embodiment, the pile uplift assembly provided by the embodiment of the invention comprises a blade group; the blade group includes blade 5, and the blade group has that blade 5 is the closed position of closed state and blade 5 is the blade opening position of expansion state under the soil effect, blade 5. In the specific processing, the overall thickness of the blade 5 is the same, or the thickness of the blade 5 may be different. Specifically, each blade group includes a plurality of blades, and the blades 5 of each blade group are arranged in a ring shape. Preferably, each blade is of identical construction.

The shape of the vane 5 is a flat plate, an arc plate or a polygonal plate, and the specific arrangement shape is determined according to actual needs.

Wherein, blade 5 can be installed on pile body 2 through the articulated elements, perhaps through setting up the staple bolt that is used for installing the articulated elements at pile body 2, the bottom of articulated elements be equipped with the spacing platform of blade 5, when blade 5 rotated to blade exhibition position, 5 bottoms of blade and spacing platform butt.

Preferably, when the pile foundation device is installed in the soil, i.e. when driving down, the blades 5 are in the blade closed position, so that the pile body 2 is lowered to a predetermined position. When pile body 2 receives ascending pulling force, soil gets into inside the blade group, and the pulling force is big more, and the blade 5 struts the external diameter big more, and the blade 5 struts big more, and after the blade 5 struts, its external diameter is far greater than pile body 2 external diameter, increases the anchor power of tubular pile, and resistance to plucking ability is stronger more, and its resistance to plucking ability increases thereupon, prevents that the tubular pile from being influenced by frozen soil and upwards pulls out. Namely, the blade 5 is opened under the action of soil, so that the contact area between the pile foundation device and the soil is increased, and further the pile body 2 is prevented from continuously rising.

It can be known through the above description that in the pile body resistance to plucking subassembly that this application embodiment provided, because blade 5 can be under the soil action blade exhibition position that blade 5 is the expansion state for pile body 2 is automatic to be opened when rising, need not the user and opens blade group alone, has improved the use convenience of pile foundation device effectively.

On the other hand, because this application need not to open alone the blade group, practices thrift the engineering time. The pile foundation device can adopt a conventional static pressure method or a hammering method without changing the original simple construction process.

In one embodiment, as shown in fig. 6, the bottom end of the blade 5 is a flange 5-2 disposed toward the axial position near the pile body 2. Specifically, the flange 5-2 may be a flat plate structure or an arc plate structure.

Preferably, the thickness of the flange 5-2 is gradually reduced from top to bottom. When the blades 5 are gradually opened, soil can enter the surfaces of the blades 5 conveniently to further expand the blades 5, even if the blades 5 rotate under the action of the soil.

As shown in fig. 2, 7 and 9, in order to facilitate the installation of the pile foundation device, the bottom ends of all the blades 5 are preferably formed into a conical structure towards the axial position of the pile body 2 when the blade group is in the blade closed position.

Preferably, as shown in fig. 7, when the set of blades is in the closed position of the blades: the bottom ends of the cone structures are mutually abutted. In the process that the pile foundation moves downwards in a soil layer, the blades 5 are mutually propped by the pressure of surrounding soil to form a conical tip. That is, during the piling process, the conical tip reduces the resistance of the pile foundation device and the soil.

As shown in fig. 2, when the blade group is in the blade-closed position: the bottom end of the cone structure encloses to form a first soil inlet for soil to enter the interior of the blade group. The hollow part in the center of the enclosed conical tip enables a small amount of soil to enter the blade 5, so that the blade 5 is gradually expanded.

As shown in fig. 11 and 12, when the blade group is in the closed position of the blades 5: the bottom end of the cone structure is used for abutting against the side wall of the pile body 2. Namely, the pile body uplift resisting assembly 1 can be installed on the side wall of the pile body 2.

In another embodiment, when the blade set is in the blade closed position: the bottom end of the cone structure is used for being arranged in a clearance with the side wall of the pile body 2.

The bottom end of the blade comprises flanges 5-2, the flanges 5-2 of all the blades 5 are closed to form the cone structure, and particularly, the flanges 5-2 and the main structure of the top end of the blade are preferably integrally formed.

The center of the fixed flange is provided with a hole, and the blade 5 can be supported through the central hole of the tubular pile under the condition that the blade 5 cannot be supported.

To facilitate the spreading of the blades 5, the soil access portion 5-3 at the top end of the blades 5 is preferably provided with a second soil inlet for soil to enter the interior of the blade assembly. Specifically, when the blade 5 is located at the blade closing position, the soil inlet portion 5-3 is of a sharp-angled structure with a high middle part and low two sides, or a V-shaped structure with a high two sides and a low middle part. When the blades 5 are in the closed position, the top of the soil inlet 5-3 may, of course, also have a wave-like configuration. Through the import of second soil, the blade group inside space is filled by the top to the soil of being convenient for, prevents that pile body 2 from subsiding.

To facilitate soil entry and deployment of the blades 5, the thickness of the soil entry portion 5-3 preferably tapers upwardly with the blades 5 in the closed position of the blades.

In one embodiment, the outer wall of the blade 5 is provided with a first stopper protrusion 5-1. Specifically, the first fiber protrusions may be bosses, dot-shaped protrusions, and the like arranged on the periphery of the blade 5, so as to increase the friction force between the blade 5 and the soil body.

Preferably, the upper surface of the first limiting protrusion 5-1 and the outer wall of the blade 5 form a soil clamping groove capable of containing soil, and specifically, the upper surface of the first limiting protrusion 5-1 and the outer wall of the blade 5 form a right angle or an acute angle. As shown in fig. 6, when the upper surface of the first position-limiting protrusion 5-1 forms an acute angle with the outer wall of the blade 5, the first position-limiting protrusion 5-1 forms a barb structure, i.e., a reverse barb, and soil is contained in the soil groove, so that the blade 5 can be conveniently unfolded. The barb structure for increasing the friction force arranged under the action of the soil or outside the blade increases the friction force of the outer surface of the blade, so that the blade 5 is spread.

In order to further facilitate the unfolding of the blade 5, it is preferable that the first limiting protrusion 5-1 extends to two opposite ends of the blade 5 along the horizontal direction of the blade 5, that is, the first limiting protrusion 5-1 has a strip structure.

Specifically, the number of the first limiting bulges 5-1 is at least two. Specifically, when the first limiting protrusions 5-1 are point-like protrusions, the first limiting protrusions 5-1 are arranged in an array. When the first limiting bulge 5-1 is of a boss structure, the first limiting bulge 5-1 is sequentially arranged from top to bottom.

In order to further improve the pulling resistance of the pile body 2, preferably, the pile body pulling resistance assembly further comprises a second limiting protrusion for being mounted on the side wall of the pile body 2. Specifically, the second limiting protrusion is fixedly connected with the pile body 2, and the second limiting protrusion can be installed on the pile body 2 through the hoop and the threaded fastener.

In a specific embodiment, the pile body uplift resisting assembly further comprises an intermediate connecting member 6 for limiting the position of the blade group, two ends of the intermediate connecting member 6 are respectively connected with the blade group and the pile body 2, and specifically, two ends of the intermediate connecting member 6 can be respectively connected with the blade 5 and the pile body 2. Specifically, when the blade 5 is unfolded to a certain stroke, the blade 5 is prevented from retracting through the middle connecting piece 6, namely soil on the upper part of the blade, and the outer diameter is reduced.

Specifically, the middle connecting piece 6 comprises a first connecting part 6-2, a second connecting part 6-1 and a middle connecting rod 6-3, two ends of the middle connecting rod are hinged to the first connecting part 6-2 and the second connecting part 6-1 respectively, the first connecting part 6-2 is fixed relative to the pile body 2, and the second connecting part 6-1 is fixedly connected with the inner surface of the blade 5. When the blade group is located at the blade unfolding position, the middle connecting rod 6-3 is clamped with the first connecting part 6-2 and the second connecting part 6-1. Specifically, the first connecting portion 6-2 and the second connecting portion 6-1 are respectively provided with a limiting boss, and when the blade 5 is unfolded by a preset angle, two ends of the intermediate connecting rod 6-3 are respectively abutted against the limiting bosses for limiting.

Specifically, the first connection portion 6-2 and the second connection portion 6-1 may be both hook structures. In the rotating process of the middle connecting rod 6-3, the first connecting part 6-2 and the second connecting part 6-1 can limit the middle connecting rod 6-3, so that the blade 5 can move in a required range, and the blade 5 is prevented from exceeding an effective stroke and contracting again.

In order to simplify the overall structure, preferably, two ends of the intermediate connecting rod 6-3 are respectively provided with a first clamping groove and a second clamping groove, the first connecting portion 6-2 is hinged with two ends of the first clamping groove through a first rotating shaft, the second connecting portion 6-1 is hinged with two ends of the second clamping groove through a second rotating shaft, and guide surfaces for enabling the intermediate connecting rod 6-3 to rotate from the blade closing position to the blade unfolding position are arranged on the surfaces of the first connecting portion 6-2 and the second connecting portion 6-1. Specifically, the first connecting portion 6-2 and the second connecting portion 6-1 may have the same structure, and are respectively mounted on the corresponding structures when being mounted. Specifically, the lower surface of the first connecting portion 6-2 and the lower surface of the second connecting portion 6-1 are both arc-shaped surfaces, so that the rotation and the guiding of the intermediate connecting rod 6-3 are facilitated.

When the middle connecting rod 6-3 is positioned at the unfolding position of the blade, the bottom of the first clamping groove is clamped with the side wall of the first connecting part 6-2, and the bottom of the second clamping groove is clamped with the side wall of the second connecting part 6-1. Specifically, when the vertical surface of the first connecting portion 6-2 and the vertical surface of the second connecting portion 6-1 are both planes, the planes are used for being abutted to the first clamping groove and the second clamping groove respectively.

In one embodiment, in order to increase the surface area of the blade 5 when the blade 5 is in the blade-extending position, preferably, when the intermediate link 6-3 is in the blade-extending position, the intermediate link 6-3 forms an acute or right angle with the pile body 2. Specifically, when the included angle between the middle connecting rod 6-3 and the pile body 2 is an acute angle, the second connecting part 6-1 is higher than the first connecting part 6-2.

In particular, each blade 5 is connected to an intermediate connection 6. In order to improve the connection stability, preferably, each blade 5 is at least connected with two intermediate connecting members 6, specifically, the intermediate connecting members 6 connected to each blade 5 are sequentially arranged from top to bottom, or the intermediate connecting members 6 connected to each blade 5 are laterally sequentially arranged, or the intermediate connecting members 6 connected to each blade 5 are arranged in an array.

In order to facilitate the installation of the pile body pulling-resistant assembly 1 on the pile body 2, preferably, the pile body pulling-resistant assembly further comprises a pile body connecting column 10, the pile body connecting column 10 is fixed relative to the pile body, and the middle connecting piece 6 is installed on the periphery of the pile body connecting column 10. Specifically, the pile connecting column 10 may be a solid structure, and the middle connecting column is installed at the bottom end of the pile 2.

Of course, the pile connecting column 10 may also be a cylindrical structure. During specific installation, the pile body connecting column 10 can be sleeved on the periphery of the pile body 2.

The pile body connecting column 10 can be directly fixedly connected with the pile body 2.

In a specific embodiment, when the pile body uplift assembly 1 is installed at the bottom end of the pile body 2, the pile body uplift assembly further comprises a mounting plate 7 fixedly connected to the top end of the pile body connecting column 10, the mounting plate 7 is used for being fixedly connected to the bottom end of the pile body 2, specifically, preferably, the outer diameter of the pile body connecting column 10 is the same as the inner diameter of the pile body 2, and preferably, the axes of the pile body connecting column 10 and the pile body 2 are collinear. As shown in fig. 2 to 5, the mounting plate 7 is directly mounted by using a threaded hole 9-1 required in the production of the pile body 2, specifically, a pile end cap 9 connected with the mounting plate 7 is arranged at the end of the pile, and the threaded hole 9-1 is located on the pile end cap 9. Specifically, the mounting plate 7 is mounted at the threaded hole 9-1 through the threaded fastener 8, and the pile body 2 does not need to be damaged or modified.

The pile body connecting column 10 is a hollow pipe body structure which is communicated with the inside of the pile body 2 and has an upper end and a lower end. When the mounting plate 7 is provided, the mounting plate 7 is of an annular plate structure.

If the blade can not be opened, a round bar or other components can be inserted into the top end of the pile body 2 until the components are abutted to the inner side surface of the blade 5, and the blade 5 can be forcedly opened after vertical abutting force is applied because the inner side surface of the flanging 5-2 of the blade 5 is an inclined surface.

In order to facilitate understanding of the use of the pilar uplift assembly 1, the following description is made with reference to fig. 2 to 5: after the pile body anti-pulling assembly 1 is installed on the pile body 2, the pile body anti-pulling assembly 1 is in a closed state in an initial state, namely the blade group is located at a blade closed position, as shown in the attached drawing 4, each blade 5 is provided with a soil inlet part 5-3 so as to be convenient for cutting into soil, and a flange 5-2 at the bottom of each blade 5 is contracted into a cone shape so as to be convenient for the pile body 2 to be pressed into the soil. At the in-process that pile body 2 inserted soil, because pile body 2 receives decurrent power, taut intermediate junction spare 6 is downward, and it is inseparable with the inside taut shrink of each blade 5, reduces the pile resistance, fills earth gradually in the cone apex round mouth that the import of first soil formed simultaneously, prevents that later stage pile foundation device from easily subsiding. The outer side of the blade 5 is provided with a first limiting bulge 5-1, and the upper end of the blade is provided with a soil inlet part 5-3. When the pile body 2 is subjected to upward pulling force, the first limiting protrusion 5-1 outside the blade 5 increases the friction force of the blade 5, the stroke of the blade 5 is blocked, the internal mounting plate 7 moves upwards along with the pile body 2, so that the middle connecting rod 6-3 is pushed to rotate around the first connecting part 6-2 and the second connecting part 6-1, the blade 5 is pushed to be unfolded outwards, the pressure of the blade 5 and soil is increased, meanwhile, the soil inlet part 5-3 of the blade 5 cuts soil outside the blade 5 into the blade 5 to increase resistance, and a gap at the lower end of the pile body 2 is filled. When the blade 5 is spread to a certain state, the middle connecting rod 6-3 is limited with the first connecting part 6-2 and the second connecting part 6-1, the middle connecting rod 6-3 can not rotate around the connecting point any more, the blade 5 is prevented from contracting again when the middle connecting rod 6-3 passes through the point vertical to the axis of the pile body 2, and the bottom of the pile body 2 is embedded and fixed.

In one embodiment, in order to facilitate the downward movement of the pile 2, the outer diameter of the blade group in the direction perpendicular to the axis of the pile 2 is preferably smaller than or equal to the outer diameter of the pile 2 when the blade group is in the blade closed position. At the moment, the pile body pulling-resistant component 1 is arranged at the bottom end of the pile body 2

In order to balance the stress on the periphery of the pile body 2, the axis of the pile body connecting column 10 is preferably coincident with the axis of the pile body 2. Specifically, the blades 5 are circumferentially and uniformly distributed by taking the axis of the pile body 2 as a center line.

In addition to the above aspects, the blade 5 is preferably formed integrally. The blade 5 is of an integrally formed structure.

In order to prolong the service life of the blade 5, the surface of the blade 5 is preferably provided with an anticorrosive coating. In particular, the blade 5 can be directly machined from a corrosion-resistant material. Wherein the blade 5 may be of sheet metal construction.

The application provides a pile foundation device, including pile body 2 and install pile body resistance to plucking subassembly 1 on pile body 2. The pile body uplift assembly 1 is any one of the pile body uplift assemblies 1, and the specific structure of the pile body uplift assembly 1 is described in the foregoing, and the present application including the pile body uplift assembly 1 has the technical effects as described above. Specifically, the pile body 2 may be a tubular pile structure.

Specifically, when the pile foundation device piles downwards, the blades 5 are in a closed state, so that the pile body can move downwards conveniently; when the pile foundation device is subjected to upward acting force, specifically, the pile body 2 can be subjected to upward pulling force at the moment, the inside of the blade 5 enters soil, the blade 5 is unfolded under the action of the soil along with the increase of the soil, and specifically, when the blade 5 does not move upwards under the action of the soil at the upper part of the blade, the pile body 2 connected with the blade does not move upwards any more.

The application provides a pair of photovoltaic power plant, include the pile foundation device and with installing photovoltaic module 4 on the pile foundation device, wherein the pile foundation device is any kind of pile foundation device of the aforesaid. Specifically, photovoltaic support 3 is installed on pile foundation device top, and photovoltaic module 4 is installed on photovoltaic support 3.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a pile body resistance to plucking subassembly, its characterized in that includes the blade group, the blade group includes blade (5), the blade group have blade (5) be the closed position of closed state the blade reach blade (5) are under the soil effect, blade (5) are the blade of expansion state and open the position.

2. The pile uplift assembly according to claim 1, wherein each blade group comprises a plurality of blades, and the blades (5) of each blade group are arranged in a ring shape.

3. Pile pulling resistance assembly according to claim 2, wherein the bottom ends of all the blades (5) form a cone structure close to the axial position of the pile (2) when the blade set is in the blade closed position.

4. The piling uplift assembly of claim 3, wherein when the blade group is in the blade closed position:

the bottom ends of the cone structures are mutually abutted;

or the bottom end of the cone structure is used for abutting against the side wall of the pile body (2);

or the bottom end of the cone structure is used for being arranged in a clearance with the side wall of the pile body (2).

5. Pile body uplift assembly according to claim 3 or 4, characterized in that the bottom end of the blades (5) comprises flanges (5-2), the flanges (5-2) of all the blades (5) being closed to form the cone structure.

6. Pile pull-resistant assembly according to claim 1, characterised in that the soil access (5-3) of the blade (5) tip is provided with a second soil inlet for soil access inside the blade group.

7. Pile body uplift assembly according to claim 6, characterized in that the blades (5) are in a blade closed position:

the top end of the soil inlet part (5-3) is of a sharp-angled structure with a high middle part and low two sides;

or the top end of the soil inlet part (5-3) is of a V-shaped structure with two high sides and a low middle part.

8. Pile body uplift assembly according to claim 1, characterized in that the outer wall of the blade (5) is provided with a first stop protrusion (5-1).

9. The pile uplift assembly according to claim 8, wherein the upper surface of the first limiting protrusion (5-1) and the outer wall of the blade (5) form a soil clamping groove capable of accommodating soil.

10. The pile pulling-resistant assembly according to claim 1, further comprising a second stop lug for fitting on the side wall of the pile (2).

11. The pile body pulling-resistant assembly according to claim 1, further comprising an intermediate connecting member (6) for limiting the position of the blade group, wherein two ends of the intermediate connecting member (6) are respectively connected with the blade group and the pile body (2).

12. The pile uplift assembly according to claim 11, further comprising a pile connection column (10), wherein the pile connection column (10) is fixed relative to the pile (2), and the intermediate connector (6) is mounted at the periphery of the pile connection column (10).

13. Pile body uplift assembly according to claim 1, characterized in that the blades (5) are shaped as flat plates, arc-shaped plates or polygonal plates.

14. Pile foundation installation comprising a pile body (2), characterized in that it further comprises a pile body uplift assembly (1) according to any one of claims 1-13 mounted on the pile body (2).

15. Piling device according to claim 14, characterised in that the blades (5) are in a closed state when the piling device is driving downwards; when the pile foundation device is acted by upward force, the blades (5) are unfolded under the action of soil.

16. A photovoltaic power plant comprising a pile foundation arrangement and a photovoltaic module (4) mounted on the pile foundation arrangement, characterized in that the pile foundation arrangement is a pile foundation arrangement according to claim 14 or 15.