Variable-diameter mountain photovoltaic foundation pile foundation

Abstract

The utility model discloses a variable-diameter mountain photovoltaic foundation pile foundation which comprises a foundation pile hole formed in a mountain and foundation pile anchor bars embedded in the foundation pile hole and formed in a criss-cross binding mode, and the tops of the foundation pile anchor bars stretch out of the foundation pile hole and are bent in the circumferential direction to be fixed to the bottom of a photovoltaic support column. The fixing positions of the photovoltaic support columns and the foundation pile anchor bars are sleeved with variable-diameter steel molds, and the variable-diameter steel molds and the foundation pile holes are filled with cast-in-place concrete. The diameter-variable steel mold is composed of two half molds which can be opened and closed and are fixed into a whole through a fastener, each half mold comprises a columnar half mold located on the upper portion and a conical half mold located on the lower portion, and the diameter of the conical half mold is gradually reduced downwards. And the durability of the foundation pile is ensured under the condition of water and soil corrosion.

Description

TECHNICAL FIELD

[0001] The utility model relates to a variable-diameter mountain photovoltaic pile foundation belongs to mountain photovoltaic field. BACKGROUND

[0002] Mountain often exists the problem that traffic infrastructure is weak, road is narrow and rugged. Generally speaking, when mountain gradient is greater than 35 - 40 degrees, large pile driving equipment cannot be transported to the construction site, and photovoltaic pile driving equipment can only rely on manual transport to the site, and single person or three or four people share handheld drill to carry out pile drilling operation. However, the handheld drill has limited power, and the drill bit is small, and the diameter of the formed pile hole is only 150mm - 160mm, and since the surrounding of the pile body is a rock layer, the small diameter pile can also meet the stress requirement.

[0003] The land of forest light and grass light requires photovoltaic modules to be a certain height from the ground, and the large diameter photovoltaic support column can meet the stress requirement due to the large wind load in mountainous areas.

[0004] The connection between the photovoltaic support column and the pile usually adopts plug-in connection, and the large photovoltaic support column and the pile hole diameter do not match, or the pile protection layer is too small, which cannot meet the specification requirements, and the pile is easy to be damaged under the condition of long-term water and soil corrosion.

[0005] How to realize the matching of the diameter of the photovoltaic support column and the pile hole, make the protection layer of the pile reinforcement meet the specification requirements, and then protect it from being corroded and damaged under long-term action, which has become a problem to be solved in the development process of mountain photovoltaic. INVENTION CONTENTS

[0006] The utility model discloses a variable-diameter mountain photovoltaic pile foundation to solve the above technical problem, which reduces the difficulty of hole forming, matches the large photovoltaic support column with the small pile hole, and makes the pile protection layer meet the national specification, so that the durability of the pile is guaranteed under the condition of water and soil corrosion.

[0007] To solve the above technical problem, the utility model adopts the technical scheme of:

[0008] A variable-diameter mountain photovoltaic pile foundation, comprising a pile hole opened on a mountain and a pile anchor bar embedded in the inside of the pile hole and bound in a longitudinal and transverse staggered manner, the top of the pile anchor bar is bent outward after extending out of the pile hole and is fixed with the bottom of a photovoltaic support column, a variable-diameter steel mold is provided outside the fixed position of the photovoltaic support column and the pile anchor bar, and the variable-diameter steel mold and the inside of the pile hole are filled with cast-in-place concrete; the variable-diameter steel mold is two half molds that can be opened and closed and are fixed as a whole through fasteners, and each half mold comprises a columnar half mold located at the upper part and a conical half mold located at the lower part, the diameter of which gradually decreases downward.

[0009] The further improvement of the utility model technical scheme lies in that the fixing mode of the foundation pile anchor and the photovoltaic support column is welding.

[0010] The further improvement of the utility model technical scheme lies in that the slope of the mountain is greater than 35 DEG.

[0011] The further improvement of the utility model technical scheme lies in that the fastener is the fixed tie that is fastened on the outer wall of the two half molds, and the fixed tie is at least one.

[0012] The further improvement of the utility model technical scheme lies in that the fixed tie is the self-locking nylon tie.

[0013] The further improvement of the utility model technical scheme lies in that the fastener includes the fixed plate formed by the outward extension of the half mold and the bolt fastening the fixed plate, and the fixed plate is provided with the through hole through which the bolt can pass.

[0014] The further improvement of the utility model technical scheme lies in that the outer wall of the variable-diameter steel mold is uniformly provided with multiple longitudinal arrangement reinforcing edges, and the reinforcing edge is the convex edge with the semicircular cross section.

[0015] Due to the adoption of the above technical scheme, the utility model has the following technical progress:

[0016] The utility model reduces the hole forming difficulty, matches the larger photovoltaic support column with the smaller foundation pile hole, and the foundation pile protection layer can meet the national standard, so that the durability of the foundation pile is guaranteed in the case of water and soil corrosion.

[0017] The bending of the foundation pile anchor and the welding with the photovoltaic support column form the shape of large upper and small lower, so that the larger photovoltaic support column is matched with the smaller foundation pile hole, and the strength of the connection position of the foundation pile anchor and the photovoltaic support column is greatly improved by the filling of the cast-in-situ concrete in the conical mold of the lower part of the variable-diameter steel mold, and the use durability of the photovoltaic support column is enhanced.

[0018] The variable-diameter steel mold of the utility model is of the open disassembly structure, is fastened through the fastener, can be repeatedly used, and reduces the cost; the setting of the reinforcing edge greatly increases the strength of the variable-diameter steel mold and greatly improves the service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is a kind of structural schematic diagram of the variable-diameter steel mold of the utility model;

[0021] Figure 3It is another structure schematic view of the variable-diameter steel mold of the utility model;

[0022] Figure 4 It is a structure schematic view of the variable-diameter steel mold provided with reinforcing edges of the utility model;

[0023] Among them, 1, the anchor bar of the pile, 2, the photovoltaic support column, 3, the hole of the pile, 4, the cast-in-place concrete, 5, the variable-diameter steel mold, 501, the columnar half mold, 502, the conical half mold, 503, the fixed plate, 504, the reinforcing edge, 6, the fixed binding belt. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in combination with examples:

[0025] As Figure 1 shown, a variable-diameter mountain photovoltaic pile foundation, including the hole of the pile 3, the anchor bar of the pile 1, the variable-diameter steel mold 5, and the cast-in-place concrete 4 filled in the variable-diameter steel mold 5 and the hole of the pile 3.

[0026] The hole of the pile 3 is arranged in the mountain rock layer with a certain slope, and the slope of the mountain is generally greater than 35°, which is a small-diameter hole of the pile. The anchor bar of the pile 1 is formed by binding the steel bars longitudinally and transversely, and is buried in the hole of the pile 3 by the cast-in-place concrete. The top of the anchor bar of the pile 1 is bent after extending out of the hole of the pile 3, and is fixed to the bottom of the photovoltaic support column 2, and the fixing mode is generally welding. After the anchor bar of the pile 1 and the photovoltaic support column 2 are welded, they form an inverted trapezoidal shape, so that the larger photovoltaic support column and the smaller hole of the pile are matched. The fixing position of the photovoltaic support column 2 and the anchor bar of the pile 1 is provided with the variable-diameter steel mold 5, the variable-diameter steel mold 5 and the hole of the pile 3 are filled with the cast-in-place concrete 4, and a pile protection layer is formed.

[0027] One structure of the variable-diameter steel mold 5 of the utility model is shown in Figure 2 , including two half molds that can be opened and closed, each half mold includes a columnar half mold 501 located at the upper part and a conical half mold 502 located at the lower part, the diameter of which gradually decreases downward. After the two half molds are closed, they are fastened by the fixed binding belt 6. The fixed binding belt 6 is generally a self-locking nylon binding belt, and multiple fixing channels can be fixed during fixing.

[0028] Another structure of the variable-diameter steel mold 5 of the utility model is shown in Figure 3 , which is different from Figure 2 structure in that the fastener is not a fixed binding belt, but includes a fixed plate 503 formed by extending the half mold outward and a bolt fastening the fixed plate 503, and the fixed plate 503 is provided with a through hole through which the bolt can pass, and the bolt and the fixed plate 503 are fastened.

[0029] The variable-diameter steel mold 5 can further be provided with multiple reinforcing ribs 504 arranged in longitudinal direction on the outer wall of the variable-diameter steel mold 5, and the reinforcing rib 504 is a convex rib with a semicircular cross section. Figure 4 The reinforcing rib greatly increases the strength of the variable-diameter steel mold and greatly improves the service life.

[0030] The two half molds are arranged outside the fixed position of the photovoltaic support column 2 and the foundation pile anchor 1, and after being fastened, a cavity with a cylindrical shape in the upper part and a tapered shape with a large upper part and a small lower part is formed, and the tapered cavity is located at the position where the foundation pile anchor 1 is bent in the circumferential direction. The inside of the cavity of the variable-diameter steel mold 5 and the foundation pile hole 3 is filled with cast-in-place concrete 4 to form a foundation pile protection layer.

[0031] The bending of the foundation pile anchor and the welding with the photovoltaic support column form a shape with a large upper part and a small lower part, so that the larger photovoltaic support column and the smaller foundation pile hole are matched, and the cast-in-place concrete filled in the tapered mold at the lower part of the variable-diameter steel mold greatly improves the strength of the connection position of the foundation pile anchor and the photovoltaic support column and enhances the use durability of the photovoltaic support column.

[0032] The installation process of the utility model is as follows:

[0033] S1. Process the foundation pile anchor 1, bend the top of the foundation pile anchor 1 in the circumferential direction and weld it together with the bottom of the photovoltaic support column 2;

[0034] S2. Complete the foundation pile hole 3 in the construction area, and put in the fixed foundation pile anchor 1 and the photovoltaic support column 2;

[0035] S3. Pour concrete into the foundation pile hole 3 to the ground;

[0036] S4. Put in two half molds and fix them through fasteners;

[0037] S5. Continue to pour concrete into the cavity of the variable-diameter steel mold 5 to the top of the mold;

[0038] S6. After the concrete is cured, the variable-diameter steel mold 5 can be used.

Claims

1. A variable diameter mountain photovoltaic pile foundation, characterized by: The invention comprises a pile hole (3) opened on a mountain and pile anchor bars (1) embedded in the pile hole (3) and bundled in a crisscross pattern. The top of the pile anchor bar (1) extends out of the pile hole (3), is bent in the circumferential direction, and is fixed to the bottom of the photovoltaic support column (2). A variable-diameter steel mold (5) is provided on the outer surface of the fixed position of the photovoltaic support column (2) and the pile anchor bar (1), and the inside of the variable-diameter steel mold (5) and the pile hole (3) is filled with cast-in-place concrete (4). The variable-diameter steel mold (5) is composed of two half molds that can be opened and closed and fixed together by fasteners. Each half mold comprises a columnar half mold (501) located at the upper part and a conical half mold (502) located at the lower part, the diameter of which gradually decreases downward.

2. The variable diameter mountain photovoltaic pile foundation according to claim 1, characterized in that: The foundation pile anchor bar (1) and the photovoltaic support column (2) are fixed by welding.

3. The variable diameter mountain photovoltaic pile foundation according to claim 1, characterized in that: The slope of the mountain is greater than 35°.

4. The variable diameter mountain photovoltaic pile foundation according to claim 1, characterized in that: The fastener is a fixing strap (6) wound around the outer walls of the two half-moulds for fastening, and there is at least one fixing strap (6).

5. The variable diameter mountain photovoltaic pile foundation according to claim 4, characterized in that: The fixing tie (6) is a self-locking nylon tie.

6. The variable diameter mountain photovoltaic pile foundation according to claim 1, characterized in that: The fastener comprises a fixing plate (503) formed by extending the half mold outward and a bolt for fastening the fixing plate (503), and a through hole through which the bolt can pass is provided on the fixing plate (503).

7. The variable diameter mountain photovoltaic pile foundation according to claim 1, characterized in that: The outer wall of the variable diameter steel die (5) is evenly distributed with a plurality of longitudinally arranged reinforcing ridges (504), and the reinforcing ridges (504) are raised ridges with a semicircular cross section.

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