Prefabricated assembly type spiral anchor foundation

Abstract

A prefabricated assembly type spiral anchor foundation comprises two half frustum pieces which are oppositely arranged. Hand holes are oppositely formed in the upper parts and the lower parts of the two half frustum sheets; connecting bolts are arranged in opposite hand holes of the two half frustum sheets; a through hole is formed in the center of the two half frustum pieces in a combined mode. A spiral anchor rod is rotationally arranged in the through hole; a flange plate is arranged at the top of the spiral anchor rod; a plurality of reinforcing rib plates are arranged between the flange plate and the spiral anchor rod; the lower end of the spiral anchor rod is pointed cone-shaped; the spiral anchor rod is provided with a plurality of spiral anchor discs on the lower sides of the two half frustum sheets; the spiral anchor disc arranged at the lowermost end is close to the lower end of the spiral anchor rod. According to the semi-frustum piece prefabricated in advance, the influence of on-site construction pouring on the environment is reduced, such as emission of pollutants such as noise and dust, and the semi-frustum piece can be directly installed on a construction site where heavy concrete construction equipment cannot be transported to and a narrow site where on-site pouring of a concrete platform reinforcement body is difficult to carry out. And the application environment is wide.

Description

Technical Field

[0001] The utility model belongs to the field of power transmission line foundations, and in particular relates to a prefabricated assembled spiral anchor foundation. Background Art

[0002] Electric power transmission uses towers to support transmission lines. When the tower is erected and installed, a screw anchor foundation is usually set at the tower foot. It is connected to the steel base of the tower foot in the soil, becoming the tower foundation to jointly resist upward pull, downward pressure and horizontal forces. The screw anchor causes less disturbance to the soil during the process of being screwed into the ground, and can fully utilize the bearing capacity of the original soil to form a stable support effect for the tower. Usually, in order to increase the friction of the screw anchor foundation in the soil and increase the stability of the entire tower, the screw anchor foundation is screwed into the ground and then concrete is poured on the screw anchor to form a concrete platform reinforcement. This increases the friction fixing effect between the screw anchor and the soil and enhances the overall stability and bearing capacity of the screw anchor foundation. However, during the construction of the tower foundation, after screwing the screw anchor and pouring the concrete, it is necessary to wait for the concrete to solidify, and subsequent construction cannot be carried out immediately. The concrete curing period is long, which greatly delays the progress of the tower construction. In addition, some construction sites are narrow and heavy concrete construction equipment cannot be transported to the construction site, making it difficult to cast the concrete platform reinforcement on site. Utility Model Content

[0003] The purpose of the present utility model is to provide a prefabricated assembled spiral anchor foundation to solve the problem of increasing the friction of the spiral anchor foundation in the soil and increasing the stability of the overall power tower. After the spiral anchor foundation is screwed into the ground, concrete is poured on part of the spiral anchor to form a concrete platform reinforcement, thereby increasing the friction fixing effect between the spiral anchor and the soil and enhancing the overall stability and bearing capacity of the spiral anchor foundation. However, during the construction of the power tower foundation, after the spiral anchor is screwed and concrete is poured, it is necessary to wait for the concrete to solidify, and subsequent construction cannot be carried out immediately. The concrete curing period is long, which greatly delays the progress of the power tower construction. In addition, some construction sites are narrow, and heavy concrete construction equipment cannot be transported to the construction site, making it difficult to carry out on-site pouring of the concrete platform reinforcement.

[0004] To achieve the above objectives, the specific technical solution of the prefabricated assembled spiral anchor foundation of the present invention is as follows:

[0005] A prefabricated assembled spiral anchor foundation comprises two oppositely arranged half-cone pieces; hand holes are arranged oppositely on the upper and lower parts of the two half-cone pieces; connecting bolts are arranged in the opposite hand holes of the two half-cone pieces; a through hole is formed in the center parts of the two half-cone pieces; a spiral anchor rod is rotatably arranged in the through hole; a flange plate is arranged on the top of the spiral anchor rod; a plurality of reinforcing ribs are arranged between the flange plate and the spiral anchor rod; the lower end of the spiral anchor rod is a pointed cone; a plurality of spiral anchor plates are arranged on the lower sides of the two half-cone pieces of the spiral anchor rod; the spiral anchor plate arranged at the lower end is arranged close to the lower end of the spiral anchor rod.

[0006] Furthermore, the two semi-truncated cone pieces are combined into a truncated cone shape with a bottom diameter larger than a top diameter.

[0007] Furthermore, a plurality of longitudinal reinforcements are vertically arranged on the outer side and the inner side of the semi-truncated cone piece; and multiple layers of stirrups are horizontally arranged on the semi-truncated cone piece.

[0008] Furthermore, sealing rings are provided at the connection positions between the two ends of the connecting bolt and the semi-cone piece.

[0009] Furthermore, the spiral anchor rod is provided with stiffening plates at positions inside the two half frustum pieces; and annular ribs are provided at both ends of the stiffening plates.

[0010] Furthermore, annular limiting holes are provided in the combination of the two semi-cone plates relative to the stiffening plate and the two annular ribs.

[0011] Furthermore, the spiral anchor rod can be optionally arranged on a common tower leg concrete platform; the tower leg concrete platform reserves a through hole with a diameter larger than the diameter of the spiral anchor plate.

[0012] The utility model provides a prefabricated assembled spiral anchor foundation with the following advantages: by arranging two semi-conical pieces on the upper part of the spiral anchor rod, a reinforcement body is formed when the spiral anchor rod is set in the soil, the friction fixing effect of the spiral anchor rod when it is set in the soil is increased, and the overall stability and bearing capacity of the spiral anchor foundation are enhanced; and the two pre-arranged semi-conical pieces do not need to be cast on site and wait for the concrete to solidify, and subsequent construction can be carried out immediately to prevent delays in the construction progress of the power tower; and the two prefabricated semi-conical pieces have high construction efficiency and will not affect the construction progress, and convenient on-site installation can reduce construction time and labor costs, and during the production process, quality control and testing can be carried out in the construction factory to ensure that it meets the design requirements before installation, avoiding quality problems that may occur during on-site construction; the prefabricated semi-conical pieces reduce the impact of on-site construction pouring on the environment, such as the emission of pollutants such as noise and dust, and for construction sites where heavy concrete construction equipment cannot be transported, and narrow sites where it is difficult to cast the concrete platform reinforcement body on site, the installation work can be carried out directly, and the applicable environment is relatively wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A magnified schematic diagram of area A in the middle;

[0015] Figure 3 This is a schematic diagram of the connecting bolt installation structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the longitudinal reinforcement and stirrup installation structure of the utility model;

[0017] Figure 5 This is a schematic diagram of the tower leg concrete platform and spiral anchor installation structure of the utility model;

[0018] Explanation of the markings in the figure: 1. Semi-cone piece; 2. Hand hole; 3. Connecting bolt; 4. Spiral anchor rod; 5. Flange plate; 6. Reinforcement rib; 7. Spiral anchor plate; 8. Longitudinal reinforcement; 9. Stirrups; 10. Sealing ring; 11. Stiffening plate; 12. Annular rib; 13. Annular limit hole; 14. Tower leg concrete platform. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a prefabricated assembled spiral anchor foundation of the present invention in conjunction with the accompanying drawings.

[0020] like Figure 1-5 As shown, the utility model is a prefabricated assembled spiral anchor foundation, comprising two relatively arranged half-cone pieces 1; hand holes 2 are relatively arranged on the upper and lower parts of the two half-cone pieces 1; connecting bolts 3 are arranged in the two half-cone pieces 1 relative to the hand holes 2; a through hole is formed in the center parts of the two half-cone pieces 1; a spiral anchor rod 4 is rotatably arranged in the through hole; a flange plate 5 is arranged on the top of the spiral anchor rod 4; a plurality of reinforcing ribs 6 are arranged between the flange plate 5 and the spiral anchor rod 4; the lower end of the spiral anchor rod 4 is a pointed cone; the spiral anchor rod 4 is provided with a plurality of spiral anchor plates 7 on the lower side of the two half-cone pieces 1; the spiral anchor plate 7 arranged at the lower end is arranged close to the lower end of the spiral anchor rod 4.

[0021] Combine Figure 1-5As shown, when in use, the two halves of the frustum 1 are relatively set on the upper part of the spiral anchor rod 4, and the connecting bolts 3 are passed through the hand holes 2 relatively set on the two halves of the frustum 1 to fix the two halves of the frustum 1 to form an integral reinforcement body. The spiral anchor rod 4 is then screwed into the ground through a screwing device and connected to the steel base of the tower foot through the flange plate 5. The spiral anchor rod 4 with a pointed cone at the lower end is more accurately screwed and positioned, with less screw-in resistance, good guidance, and less disturbance to the surrounding soil. The reinforcement body formed by fixing the two halves of the frustum 1 increases the stability of the spiral anchor foundation, increases the friction fixing effect of the spiral anchor rod 4 when it is set in the soil, and enhances the overall stability and bearing capacity of the spiral anchor foundation. The two pre-set half frustum pieces 1 do not need to be cast on site and wait for After the concrete solidifies, subsequent construction can be carried out immediately to prevent delays in the construction of the power tower. The two prefabricated semi-cone segments 1 have high construction efficiency and will not affect the construction progress. Convenient on-site installation can reduce construction time and labor costs. In the production process, quality control and testing can be carried out in the construction factory to ensure that it meets the design requirements before installation, avoiding quality problems that may occur during on-site construction. The prefabricated semi-cone segments 1 reduce the impact of on-site construction pouring on the environment, such as the emission of pollutants such as noise and dust. For construction sites where heavy concrete construction equipment cannot be transported, and narrow sites where it is difficult to carry out on-site pouring of concrete platform reinforcements, installation work can be carried out directly, and the applicable environment is relatively wide.

[0022] The spiral anchor rod 4 is provided with a stiffening plate 11 at a position inside the two half frustum pieces 1; annular ribs 12 are provided at both ends of the stiffening plate 11, and annular limiting holes 13 are provided in the two half frustum pieces 1 relative to the stiffening plate 11 and the two annular ribs 12. When the two half frustum pieces 1 are set on the upper part of the spiral anchor rod 4, the stiffening plate 11 and the annular ribs 12 provided at both ends are opposite to the annular limiting holes 13 of the two half frustum pieces 1. The stiffening plate 11 and the annular ribs 12 provided at both ends are limited by the annular limiting holes 13, so that the two half frustum pieces 1 are limited in the vertical direction of the spiral anchor rod 4 and cannot move, thereby increasing the stability and bearing capacity of the two half frustum pieces 1 on the spiral anchor rod 4 when the spiral anchor foundation is set in the ground, and increasing the tensile strength of the spiral anchor rod 4 in the vertical direction through the friction between the two half frustum pieces 1 and the ground.

[0023] Sealing rings 10 are provided at the connection positions between the two ends of the connecting bolt 3 and the semi-cone piece 1. After the spiral anchor rod 4 and the two semi-cone pieces 1 are screwed into the ground, the hand holes 2 of the two semi-cone pieces 1 are sealed with cement mortar to increase the flatness of the surface of the two semi-cone pieces 1 and protect the connecting bolt 3. The provided sealing ring 10 can effectively prevent the cement mortar from entering the hand hole 2, forming an anti-corrosion sealing effect on the connecting bolt 3.

[0024] like Figure 4As shown, the two half-cone pieces 1 are combined into a cone shape with a bottom diameter larger than the top diameter, and a plurality of longitudinal bars 8 are vertically arranged on the outside and inside of the half-cone piece 1; the half-cone piece 1 is horizontally provided with multiple layers of stirrups 9. The multiple longitudinal bars 8 provided increase the vertical support effect and tensile strength of the two half-cone pieces 1, and the multiple layers of stirrups 9 increase the overall strength of the half-cone piece 1. When the spiral anchor foundation is set in the ground, the two half-cone pieces 1 combined into a cone shape can provide better support for the spiral anchor foundation and increase the anti-pullout effect.

[0025] like Figure 5 As shown, the spiral anchor rod 4 can be optionally set on the commonly used tower leg concrete platform 14; the tower leg concrete platform 14 reserves a through hole with a diameter larger than the diameter of the spiral anchor plate 7. In addition to using the semi-cone piece 1 as a reinforcement to increase stability and support effect, the concrete platform pre-set at the tower leg position can also be used as a reinforcement for the spiral anchor foundation. By reserving a through hole with a diameter larger than the diameter of the spiral anchor plate 7 on the tower leg concrete platform 14, the spiral anchor rod 4 is screwed into the soil in the through hole using a screwing device, and then the tower leg concrete platform 14 and the spiral anchor rod 4 are combined into a whole using concrete mortar, thereby further increasing the stable support effect of the spiral anchor foundation.

[0026] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A prefabricated screw anchor foundation, characterized in that: The invention comprises two oppositely arranged half-cone pieces (1); the upper and lower parts of the two half-cone pieces (1) are oppositely provided with hand holes (2); connecting bolts (3) are provided in the two half-cone pieces (1) relative to the hand holes (2); the central parts of the two half-cone pieces (1) are combined to form a through hole; a spiral anchor rod (4) is rotatably provided in the through hole; a flange plate (5) is provided at the top of the spiral anchor rod (4); a plurality of reinforcing ribs (6) are provided between the flange plate (5) and the spiral anchor rod (4); the lower end of the spiral anchor rod (4) is a pointed cone; the spiral anchor rod (4) is provided with a plurality of spiral anchor discs (7) on the lower sides of the two half-cone pieces (1); the spiral anchor disc (7) provided at the lower end is provided close to the lower end of the spiral anchor rod (4).

2. The prefabricated assembled spiral anchor foundation according to claim 1, characterized in that: The two semi-truncated cone pieces (1) are combined into a truncated cone shape with a bottom diameter larger than a top diameter.

3. The prefabricated assembled spiral anchor foundation according to claim 1, characterized in that: A plurality of longitudinal reinforcements (8) are vertically arranged on the outer side and the inner side of the semi-cone plate (1); and multiple layers of stirrups (9) are horizontally arranged on the semi-cone plate (1).

4. The prefabricated assembled spiral anchor foundation according to claim 1, characterized in that: Sealing rings (10) are provided at the connection positions between the two ends of the connecting bolt (3) and the semi-cone plate (1).

5. The prefabricated assembled spiral anchor foundation according to claim 1, characterized in that: The spiral anchor rod (4) is provided with a stiffening plate (11) at a position inside the two half frustum plates (1); and annular ribs (12) are provided at both ends of the stiffening plate (11).

6. The prefabricated assembled spiral anchor foundation according to claim 5, characterized in that: The two semi-cone plates (1) are provided with an annular limiting hole (13) at positions relative to the stiffening plate (11) and the two annular ribs (12).

7. The prefabricated assembled spiral anchor foundation according to claim 1, characterized in that: The spiral anchor rod (4) can be optionally arranged on a commonly used tower leg concrete platform (14); the tower leg concrete platform (14) reserves a through hole with a diameter larger than that of the spiral anchor plate (7).

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