Flexible support end uplift pile foundation

Abstract

The utility model relates to the technical field of photovoltaic equipment, in particular to a flexible support end uplift pile foundation which comprises a tubular pile, one end of the tubular pile extends into a tubular pile hole excavated in the ground, and the other end of the tubular pile is located above the ground. The space between the tubular pile hole and the outer wall of the tubular pile is filled with the pile periphery filler; the expansion pier extends into the ground from the earth surface, the expansion pier is connected to the outer wall of the pipe pile in a surrounding mode, the expansion pier is connected with the pile periphery filler, and the diameter of the expansion pier is larger than that of the pipe pile. The side friction resistance of the tubular pile and the undisturbed soil around the tubular pile is improved through the filler around the tubular pile, the interface of the tubular pile and the undisturbed soil around the tubular pile becomes more uneven through the filler around the tubular pile, the friction force is increased, and therefore the uplift bearing capacity of the tubular pile is improved. The horizontal bearing capacity of the tubular pile is only provided by the upper section of the soil penetration depth of the pile, and the contact area between the tubular pile and undisturbed soil around the pile is increased by the upper expanding pier, so that the horizontal bearing capacity of the tubular pile is increased.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic technology, and particularly relates to an anti-pulling pile foundation for the end of a flexible support. Background Art

[0002] At present, traditional photovoltaic supports are mostly built on sites such as deserts and gobi with large floor areas and high flatness. It is difficult to build in areas with poor topographical conditions, so the construction and development are limited by land resources. In recent years, a large-span cable structure flexible photovoltaic support is being applied more and more. It uses suspension cables to bear the load of photovoltaic modules, and has the characteristics of strong topographical adaptability, high clearance, and high land utilization rate. The suspension cable of the flexible support is connected to the foundation at the end. Therefore, the end tension foundation of the flexible support simultaneously bears large horizontal forces and uplift forces. In order to improve construction efficiency, most of the flexible support foundations use micro-pile foundations. However, a single micro-pile foundation is often difficult to provide large horizontal bearing capacity and uplift bearing capacity. This is mainly because the diameter of the micro-pile foundation is small and the contact area with the soil is small, so that the horizontal bearing capacity and uplift bearing capacity of the flexible support foundation built with the micro-pile foundation are poor. Summary of the Invention

[0003] The present application aims to at least partly solve one of the above technical problems in the prior art. To this end, an embodiment of the present application provides an anti-pulling pile foundation for the end of a flexible support, which improves the uplift bearing capacity of the pipe pile and increases the horizontal bearing capacity of the pipe pile.

[0004] An anti-pulling pile foundation for the end of a flexible support, comprising:

[0005] A pipe pile, one end of the pipe pile extends into a pipe pile hole excavated on the ground, and the other end is located above the ground;

[0006] A pile circumference filler, which is filled between the pipe pile hole and the outer wall of the pipe pile;

[0007] An enlarged pier, the enlarged pier extends from the ground surface into the ground, the enlarged pier is circumferentially connected to the outer wall of the pipe pile, the enlarged pier is connected to the pile circumference filler, and the diameter of the enlarged pier is larger than the diameter of the pipe pile.

[0008] In an optional or preferred embodiment, a water-dispersing structure is provided at the bottom of the section of the pipe pile extending out of the ground.

[0009] In an optional or preferred embodiment, the water-dispersing structure and the enlarged pier are of an integral structure.

[0010] In an optional or preferred embodiment, one end of the pipe pile extending into the pipe pile hole is blocked.

[0011] In an alternative or preferred embodiment, the end of the pipe pile extending into the pipe pile hole is sealed with slightly expansive concrete.

[0012] In an alternative or preferred embodiment, the filling material around the pile is cement slurry.

[0013] In an alternative or preferred embodiment, the filling material around the pile is fine aggregate concrete.

[0014] Based on the above technical solutions, the embodiments of the present application have at least the following beneficial effects: With the above technical solutions, the present application improves the side friction resistance between the pipe pile and the original soil around the pile through the filling material around the pile. The filling material around the pile makes the interface between the pipe pile and the original soil around the pile more uneven, increasing the frictional force and thus improving the uplift bearing capacity of the pipe pile. The horizontal bearing capacity of the pipe pile is only provided by the upper section of the pile penetration depth. The upper enlarged pier increases the contact area between the pipe pile and the original soil around the pile, thereby increasing the horizontal bearing capacity of the pipe pile. Description of the Drawings

[0015] The following further illustrates the present application in conjunction with the drawings and embodiments;

[0016] Figure 1 is a schematic structural view of the uplift pile foundation at the end of the flexible support provided by the embodiment of the present application;

[0017] Figure 2 is Figure 1 the sectional view taken along the line A-A in Detailed Embodiments

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] The following further describes in detail the embodiments of the present application in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0020] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0022] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on the top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under the bottom of" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0023] Currently, traditional photovoltaic supports are mostly built on sites such as deserts and gobi with large floor areas and high flatness. It is difficult to build in areas with poor topographical conditions, so the construction and development are restricted by land resources. In recent years, a large-span cable structure flexible photovoltaic support has been increasingly used. It uses suspension cables to bear the load of photovoltaic modules and has the characteristics of strong terrain adaptability, high clearance, and high land utilization rate. The suspension cable of the flexible support is connected to the foundation at the end. Therefore, the flexible support end-pull foundation simultaneously bears large horizontal forces and uplift forces. To improve construction efficiency, most flexible support foundations use micro-pile foundations. However, a single micro-pile foundation is often difficult to provide large horizontal bearing capacity and uplift bearing capacity, mainly because the diameter of the micro-pile foundation is small and the contact area with the soil is small, which results in poor horizontal bearing capacity and uplift bearing capacity of the flexible support foundation built with micro-pile foundations.

[0024] Refer to Figure 1 、Figure 2 , this application provides a flexible support end anti-pull pile foundation, including a pipe pile 100, a pile circumference filler 200, and an enlarged pier 300.

[0025] One end of the pipe pile 100 extends into a pipe pile hole excavated on the ground, and the other end is above the ground. The pile circumference filler 200 is filled between the pipe pile hole and the outer wall of the pipe pile 100. The enlarged pier 300 extends from the ground surface into the ground interior, the enlarged pier 300 is connected around the outer wall of the pipe column 100, the enlarged pier 300 is connected to the pile circumference filler 200, and the diameter of the enlarged pier 300 is greater than the diameter of the pipe pile 100.

[0026] This application improves the side friction resistance between the pipe pile 100 and the original soil 400 around the pile through the pile circumference filler 200. The pile circumference filler 200 makes the interface between the pipe pile 100 and the original soil 400 around the pile more uneven, increasing the friction force, thereby improving the anti-pull bearing capacity of the pipe pile 100. The horizontal bearing capacity of the pipe pile 100 is only provided by the upper section of the pile penetration depth. The upper enlarged pier 300 increases the contact area between the pipe pile 100 and the original soil 400 around the pile, thereby increasing the horizontal bearing capacity of the pipe pile 100.

[0027] In some embodiments, a water-dispersing structure 500 is provided at the bottom of the section of the pipe pile 100 extending out of the ground. To prevent rainwater from accumulating at the bottom of the section of the pipe pile 100 extending out of the ground.

[0028] In this application, the water-dispersing structure 500 is an annular conical structure provided around the pipe pile 100 at the bottom of the section of the pipe pile 100 extending out of the ground.

[0029] In some embodiments, the water-dispersing structure 500 and the enlarged pier 300 are an integral structure. To improve the connection performance between the water-dispersing structure 500 and the enlarged pier 300. When pouring the enlarged pier 300, it is poured and formed together with the water-dispersing structure 500, shortening the construction period.

[0030] In some embodiments, one end of the pipe pile 100 extending into the pipe pile hole is sealed with concrete 600. The concrete 600 extends into the pipe pile 100 for a certain length.

[0031] In some embodiments, the pile circumference filler 200 is cement slurry. The cement slurry uses ordinary Portland cement with a strength grade greater than 42.5.

[0032] In some embodiments, the pile circumference filler 200 is fine aggregate concrete.

[0033] In some embodiments, one end of the pipe pile 100 extending into the pipe pile hole on the ground is sealed with micro-expansion concrete. To prevent the original soil 400 around the pile in the pipe pile hole from entering the interior of the pipe pile 100.

[0034] The present application also provides a construction method for the anti-pulling pile foundation at the end of a flexible support, including the following steps:

[0035] Step 1: Seal the end of the pipe pile 100 with concrete 600.

[0036] Step 2: Excavate the foundation pit for the enlarged pier 300 at the pile foundation position.

[0037] Step 3: Use a long-bolt drilling machine to drill a hole in the center of the excavated foundation pit to drill a pipe pile hole for installing the pipe pile 100.

[0038] Step 4: Mechanically implant the pipe pile 100 into the drilled pipe pile hole.

[0039] Step 5: Fill the gap between the outer wall of the pipe pile 100 and the pipe pile hole with the pile circumference filler 200.

[0040] Step 6: Pour the enlarged pier 300 and the apron structure 500 in the foundation pit of the enlarged pier 300.

[0041] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0042] The above has described the embodiments of the present application in detail with reference to the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present application.

Claims

1. A flexible support end anti-pulling pile foundation, characterized in that Including: A pipe pile, one end of the pipe pile extends into a pipe pile hole excavated on the ground, and the other end is located above the ground; A pile perimeter filler, which is filled between the pipe pile hole and the outer wall of the pipe pile; An enlarged pier, the enlarged pier extends from the ground surface into the ground, the enlarged pier is circumferentially connected to the outer wall of the pipe pile, the enlarged pier is connected to the pile perimeter filler, and the diameter of the enlarged pier is larger than the diameter of the pipe pile.

2. The anti-pulling pile foundation at the end of the flexible support according to claim 1, characterized in that: A water-dispersing structure is provided at the bottom of the section of the pipe pile extending out of the ground.

3. The anti-pulling pile foundation at the end of the flexible support according to claim 2, characterized in that: The water-dispersing structure and the enlarged pier are of an integral structure.

4. The anti-pulling pile foundation at the end of the flexible support according to claim 1, wherein: One end of the pipe pile extending into the pipe pile hole is blocked.

5. The anti-pulling pile foundation at the end of the flexible support according to claim 4, characterized in that: One end of the pipe pile extending into the pipe pile hole is blocked with slightly expansive concrete.

6. The anti-pulling pile foundation at the end of the flexible support according to claim 1, characterized in that: The pile perimeter filler is cement slurry.

7. The anti-pulling pile foundation at the end of the flexible support according to claim 1, characterized in that: The pile perimeter filler is fine aggregate concrete.

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