Novel spiral anchor pile group foundation steel bearing platform

Abstract

The invention relates to the technical field of iron towers, in particular to a novel spiral anchor pile group foundation steel bearing platform which comprises a large cross beam, a small cross beam, connecting pieces, foundation anchors and connecting bolts. The lower portions of the four ends of the large cross-shaped beam are each connected with a small cross-shaped beam through a connecting bolt, the lower portions of the four ends of each small cross-shaped beam are each connected with a connecting piece through a connecting bolt, and the lower portion of each connecting piece is connected with a foundation anchor. All the components are connected through high-strength connecting bolts, the construction difficulty is greatly reduced, and the construction efficiency is improved. And secondly, through the vertical spaced arrangement of the spiral anchor foundation anchors, the disturbance influence of all the foundation anchors on the soil body during spiral anchor drilling is reduced, and the overall bearing capacity of the spiral anchor foundation is improved. The arc-shaped plates are arranged on the large cross-shaped beam and the small cross-shaped beam, stress concentration at the center welding position is transited, the stiffening ribs are arranged, the overall rigidity of the spiral anchor pile group bearing platform is improved, and the overall bearing capacity is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of iron towers, and in particular to a novel spiral anchor pile group foundation steel cap. Background Art

[0002] At present, the construction of power transmission line projects still remains in the state of "manpower-based, machinery-assisted", with a low degree of mechanization, simple construction equipment, high labor intensity, low operating efficiency, and high hazards. With the rapid development of the economy and society, there is a shortage of labor for front-line construction personnel, and labor costs continue to increase. The construction method of manpower-based, machinery-assisted will inevitably be unsustainable. As a new type of foundation that can be mechanized, the spiral anchor foundation can be prefabricated and mass-produced in the factory, which can not only provide reliable safety guarantees, but also greatly reduce the investment of manpower and material resources on the construction site, saving a lot of construction time and cost. However, since the vertical compressive bearing capacity, vertical pull-out bearing capacity, and lateral horizontal force bearing capacity of a single spiral anchor foundation cannot meet the requirements of the transmission tower to resist external loads, it is necessary to transform multiple spiral anchor foundations into a whole to jointly bear the external load. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present application provides a novel spiral anchor pile group foundation steel cap to solve the above problems.

[0004] The technical solutions adopted in this application are as follows:

[0005] A novel spiral anchor pile group foundation steel cap comprises a large cross beam 1, a small cross beam 2, a connecting piece 5, a foundation anchor 6 and connecting bolts;

[0006] The four ends of the large cross beam 1 are each connected to a small cross beam 2 via connecting bolts 4, and the four ends of each small cross beam 2 are each connected to a connecting piece 5 via connecting bolts 2, and each connecting piece 5 is connected to a base anchor 6 at its bottom.

[0007] Furthermore, the large cross beam 1 includes a top plate 1-3 and a bottom plate 1-5, a flange 1-1 is arranged at the center of the top plate 1-3, a center steel pipe 1-2 is arranged below the flange 1-1, and the top plate 1-3 and the bottom plate 1-5 are welded around the center steel pipe 1-2 to form a "cross" shape;

[0008] A web plate 1-6 and web plate stiffening ribs 1-10 are arranged between the top plate 1-3 and the bottom plate 1-5, and the web plate stiffening ribs 1-10 are located on both sides of the web plate 1-6 and are arranged in the vertical direction;

[0009] The connection between the two adjacent top plates 1-3 is welded through an arc plate 1-4, and the connection between the two adjacent bottom plates 1-5 is welded through an arc plate 1-4; the stiffening rib 1-8 is arranged between the upper and lower parts of the arc plate 1-4 and is welded with the central steel pipe 1-2, the top plate 1-3, and the bottom plate 1-5 by butt welding;

[0010] A vertical round tube 1-7 matched with the connecting bolt 24 is arranged at one end between the top plate 1-3 and the bottom plate 1-5 away from the central steel tube 1-2.

[0011] Furthermore, the small cross beam 2 includes a top plate 2 3-1 and a bottom plate 2 3-2, the top plate 2 3-1 and the bottom plate 2 3-2 are provided with a web 2 3-7, the top plate 2 3-1 and the bottom plate 2 3-2 are connected together through the web 2 3-7 by a butt weld and form a "cross" shape, and a center steel pipe 2 3-3 is provided at the center of the small cross beam, and the center steel pipe 2 3-3 is adapted to the connecting bolt 2 4;

[0012] The connection between the two adjacent top plates 3-1 is welded by an arc plate 3-6, and the connection between the two adjacent bottom plates 3-2 is welded by an arc plate 3-6;

[0013] The four ends of the small cross beam 2 are all provided with end steel pipes 3-4 matched with the connecting bolts 2, and a stiffening plate 3-5 is provided on one side of the end steel pipe 3-4 along a 45° direction and welded with a fillet weld.

[0014] Furthermore, the connecting member 5 includes an inverted "U"-shaped top plate 4-1 and a rectangular bottom plate 4-2. The two sides of the top plate 4-1 are welded to the bottom plate 4-2 by butt welds. Bolt holes 4-3 with the same diameter are arranged in the centers of the top plate 4-1 and the bottom plate 4-2.

[0015] Furthermore, the base anchor 6 is welded and fixed on the bottom plate three 4 - 2 of the connecting member 5 .

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention relates to a spiral anchor pile group foundation steel cap, in which a large cross beam is connected to an upper structure by bolts via a flange, a large cross beam is connected to a small cross beam by connecting bolts via a steel pipe at the end of the large cross beam and a steel pipe at the center of the small cross beam, a small cross beam is connected to a connecting piece by connecting bolts via a steel pipe at the end of the small cross beam and bolt holes on a U-shaped plate, and a spiral anchor base anchor is welded to a bottom plate of the connecting piece, thereby realizing the connection of the entire structure.

[0018] The components of this application are connected by high-strength connecting bolts, which greatly reduces the construction difficulty and increases the construction efficiency. Secondly, by arranging the spiral anchor base anchors vertically at intervals, the disturbance effect of each base anchor on the soil during spiral anchor drilling is reduced, and the overall bearing capacity of the spiral anchor foundation is improved. By setting arc plates on the large cross beam and the small cross beam, the stress concentration at the center welding point is transitioned, and stiffening ribs are set to improve the overall stiffness of the spiral anchor pile cap and strengthen the overall bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the steel cap structure of the spiral anchor pile group foundation of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the large cross beam of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the small cross beam of this application;

[0022] Figure 4 This is a schematic diagram of the connector structure of this application;

[0023] In the attached drawings: 1 is a large cross beam; 2 is a connecting bolt 1; 3 is a small cross beam; 4 is a connecting bolt 2; 5 is a connecting piece; 6 is a base anchor; 1-1 is a flange; 1-2 is a central steel pipe 1; 1-3 is a top plate 1; 1-4 is an arc plate 1; 1-5 is a bottom plate 1; 1-6 is a web plate 1; 1-7 is a round tube; 1-8 is a stiffening rib; 1-10 is a web stiffening rib; 3-1 is a top plate 2; 3-2 is a bottom plate 2; 3-3 is a central steel pipe 2; 3-4 is an end steel pipe; 3-5 is a stiffening plate; 3-6 is an arc plate 2; 3-7 is a web plate 2; 4-1 is a top plate 3; 4-2 is a bottom plate 3; 4-3 is a bolt hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments; based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0025] like Figure 1 As shown, the present application discloses a novel spiral anchor pile foundation steel cap, comprising a large cross beam 1, a small cross beam 2, a connecting piece 5, a base anchor 6 and connecting bolts; each of the four ends of the large cross beam 1 is connected to a small cross beam 2 through a connecting bolt 4, each of the four ends of the small cross beam 2 is connected to a connecting piece 5 through a connecting bolt 2, each of the connecting pieces 5 is connected to a base anchor 6 below, and the base anchor 6 is welded and fixed to the bottom plate 3 4-2 of the connecting piece 5.

[0026] like Figure 2 As shown, the large cross beam 1 of the present application comprises a top plate 1-3 and a bottom plate 1-5, a flange 1-1 is arranged at the center of the top plate 1-3, a center steel pipe 1-2 is arranged below the flange 1-1, and the top plate 1-3 and the bottom plate 1-5 are welded around the center steel pipe 1-2 to form a "cross" shape;

[0027] A web plate 1-6 and web plate stiffening ribs 1-10 are arranged between the top plate 1-3 and the bottom plate 1-5, and the web plate stiffening ribs 1-10 are located on both sides of the web plate 1-6 and are arranged in the vertical direction;

[0028] The connection between the two adjacent top plates 1-3 is welded through an arc plate 1-4, and the connection between the two adjacent bottom plates 1-5 is welded through an arc plate 1-4; a stiffening rib 1-8 is arranged between the upper and lower parts of the arc plate 1-4 and is welded to the central steel pipe 1-2, the top plate 1-3 and the bottom plate 1-5 by butt welds; a vertical round tube 1-7 compatible with the connecting bolt 2-4 is arranged at one end between the top plate 1-3 and the bottom plate 1-5 away from the central steel pipe 1-2.

[0029] like Figure 3 As shown, the small cross beam 2 described in the present application includes a top plate 2 3-1 and a bottom plate 2 3-2, the top plate 2 3-1 and the bottom plate 2 3-2 are provided with a web 2 3-7, the top plate 2 3-1 and the bottom plate 2 3-2 are connected together through the web 2 3-7 by a butt weld and form a "cross" shape, and a center steel pipe 2 3-3 is provided at the center of the small cross beam, and the center steel pipe 2 3-3 is adapted to the connecting bolt 2 4;

[0030] The connection between the two adjacent top plates 3-1 is welded through an arc plate 3-6, and the connection between the two adjacent bottom plates 3-2 is welded through an arc plate 3-6; the four ends of the small cross beam 2 are provided with end steel pipes 3-4 compatible with the connecting bolts 2, and a stiffening plate 3-5 is provided on one side of the end steel pipe 3-4 along the 45° direction and welded using a fillet weld.

[0031] like Figure 4 As shown, the connecting member 5 includes an inverted "U"-shaped top plate 3 4-1 and a rectangular bottom plate 3 4-2. The two sides of the top plate 3 4-1 are welded to the bottom plate 3 4-2 by butt welds. Bolt holes 4-3 with the same diameter are arranged in the centers of the top plate 3 4-1 and the bottom plate 3 4-2.

[0032] The present application connects the large cross beam to the upper structure through a flange with bolts, the large cross beam to the small cross beam through the steel pipe at the end of the large cross beam and the steel pipe in the center of the small cross beam with a connecting bolt 2, and the small cross beam to the connecting piece through the steel pipe at the end of the small cross beam and the circular hole on the U-shaped plate with a connecting bolt 1, which greatly reduces the construction and connection difficulties of multiple spiral anchor foundations, has a good welding effect, and ensures the reliable connection between the spiral anchor foundation anchor rod and the pedestal. Secondly, through the vertical spacing arrangement of the spiral anchor foundation anchors, the disturbance effect of each base anchor on the soil during the spiral anchor drilling is reduced, and the overall bearing capacity of the spiral anchor foundation is improved. At the same time, by setting arc plates on the large cross beam and the small cross beam, the stress concentration at the center welding is transitioned, and stiffening ribs are set to improve the overall stiffness of the spiral anchor pile pedestal, and the overall bearing capacity of the foundation is strengthened.

[0033] During specific use, first, after the foundation anchor is drilled into the soil, the top of the foundation anchor and the bottom plate of the connecting piece are welded with a fillet weld; secondly, when all the foundation anchors are welded to the connecting piece, the prefabricated small cross beam is placed on the connecting piece and connected through connecting bolts. When connecting, gaskets are set at both ends of the bolts, and the connecting bolt nuts and gaskets are placed on the inner side of the U-shaped top plate of the connecting piece; finally, when all the small cross beams are connected to the connecting piece, the large cross beam is placed on the small cross beam and connected through connecting bolt 2. When connecting, gaskets are set at both ends of the bolts.

[0034] It should be noted that, although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application.

[0035] The present application and its implementation methods are described above, and such description is not restrictive. The drawings show only one implementation method of the present application, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the inventive purpose of the present application, they should all fall within the protection scope of the present application.

Claims

1. A new type of spiral anchor pile foundation steel cap, characterized by: It comprises a large cross beam (1), a small cross beam (3), a connecting piece (5), a base anchor (6) and connecting bolts; The four ends of the large cross beam (1) are each connected to a small cross beam (3) via a second connecting bolt (4), the four ends of each small cross beam (3) are each connected to a connecting piece (5) via a first connecting bolt, and the base anchor (6) is connected to the bottom of each connecting piece (5).

2. The novel spiral anchor pile foundation steel cap according to claim 1 is characterized by: The large cross beam (1) comprises a top plate (1-3) and a bottom plate (1-5), a flange (1-1) is arranged at the center of the top plate (1-3), a center steel pipe (1-2) is arranged below the flange (1-1), and the top plate (1-3) and the bottom plate (1-5) are welded around the center steel pipe (1-2) to form a "cross" shape; A web plate 1 (1-6) and web plate stiffening ribs (1-10) are arranged between the top plate 1 (1-3) and the bottom plate 1 (1-5), and the web plate stiffening ribs (1-10) are located on both sides of the web plate 1 (1-6) and are arranged in the vertical direction; The connection between the two adjacent top plates (1-3) is welded through an arc plate (1-4), and the connection between the two adjacent bottom plates (1-5) is welded through an arc plate (1-4); a stiffening rib (1-8) is arranged between the upper and lower parts of the arc plate (1-4) and is welded with a central steel pipe (1-2), a top plate (1-3), and a bottom plate (1-5) by butt welding; A vertical round tube (1-7) matched with connecting bolt 2 (4) is arranged at one end between the top plate 1 (1-3) and the bottom plate 1 (1-5) away from the central steel tube 1 (1-2).

3. The novel spiral anchor pile foundation steel cap according to claim 2 is characterized by: The small cross beam (3) comprises a top plate (3-1) and a bottom plate (3-2), the top plate (3-1) and the bottom plate (3-2) are provided with a web (3-7), the top plate (3-1) and the bottom plate (3-2) are connected together through the web (3-7) by a butt weld to form a "cross" shape, and a center steel pipe (3-3) is provided at the center of the small cross beam, and the center steel pipe (3-3) is matched with a connection bolt (4); The connection between the two adjacent top plates (3-1) is welded via an arc plate (3-6), and the connection between the two adjacent bottom plates (3-2) is welded via an arc plate (3-6); The four ends of the small cross beam (3) are all provided with end steel pipes (3-4), and a stiffening plate (3-5) is provided on one side of the end steel pipe (3-4) along a 45° direction and is welded by a fillet weld.

4. The novel spiral anchor pile foundation steel cap according to claim 3 is characterized by: The connecting member (5) comprises an inverted "U"-shaped top plate three (4-1) and a rectangular bottom plate three (4-2), the two sides of the top plate three (4-1) and the bottom plate three (4-2) are welded by butt welding, and the centers of the top plate three (4-1) and the bottom plate three (4-2) are both provided with bolt holes (4-3) with the same diameter.

5. The novel spiral anchor pile foundation steel cap according to claim 4 is characterized by: The base anchor (6) is welded and fixed on the bottom plate three (4-2) of the connecting member (5).

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