CN218933194U - Group anchor type screw anchor foundation adopting flange connection - Google Patents

Abstract

A group anchor type spiral anchor foundation adopting flange connection comprises a steel bearing platform, wherein a tower leg main material is connected above the steel bearing platform, a plurality of short steel pipes are fixed below the steel bearing platform, each short steel pipe is connected with an anchor rod through a flange, and a plurality of spiral anchor plates are arranged on the anchor rod. The group anchor type screw anchor foundation adopting flange connection is simple in structure, all components can be processed in factories, quality of the foundation structure body is guaranteed, field welding and field corrosion prevention can be avoided, foundation design and construction level are effectively improved, and popularization and application of screw anchor foundations are facilitated.

Description

Group anchor type screw anchor foundation adopting flange connection

Technical Field

The utility model relates to a transmission line iron tower foundation, in particular to a group anchor type spiral anchor foundation connected by flanges.

Background

The screw anchor foundation consists of screw anchor, upper bearing platform and other components and is one anchoring structure with deep soil body to resist the acting force of upper structure. The foundation is mainly made of steel members, is prefabricated in a factory, and is stable in quality. The foundation is mechanically constructed, the construction procedures are few, the construction is simple, and the use of concrete materials can be obviously reduced or avoided, so that the construction period is greatly shortened. Meanwhile, the spiral anchor is not required to be excavated in a large range during construction, the ground surface damage range is relatively small, and the environmental protection benefit is obvious. In addition, the disturbance of the spiral anchor to the soil body is small, the inherent strength of the undisturbed soil body can be fully exerted, and the saving of the basic material is realized.

In the construction process of the spiral anchor foundation, the construction equipment is difficult to realize accurate positioning, and certain eccentricity exists after the anchor rod is screwed. The roof bolt top after the construction is welded the connecting piece in addition at home and abroad generally, then is connected with the iron tower. The requirements on the welding process are high in field welding, and the quality acceptance requirements are difficult to meet. For the screw anchor foundation needing to adopt the group anchor type, the field welding workload is very huge, and even the overhead welding is needed for realizing the connection of the anchor rod and the upper steel bearing platform, so that the difficulty is high and the quality is difficult to ensure, and the popularization and the application of the screw anchor foundation are seriously restricted.

Disclosure of Invention

The utility model aims to solve the technical problems that: a group anchor type screw anchor foundation adopting flange connection aims at solving the problems that an existing screw anchor needs field welding, cannot be positioned accurately, is high in construction difficulty and the like.

The technical scheme of the utility model is as follows:

a group-anchored screw anchor foundation employing flange connections, comprising: the steel pile cap, the tower leg main material is connected to steel pile cap top, and a plurality of short steel pipe is fixed to steel pile cap below, and every short steel pipe all passes through flange joint stock, is provided with a plurality of spiral anchor disc on the stock.

The spiral anchor discs are a plurality of, are fixed on the anchor rod along the axial direction of the anchor rod, and are arranged at intervals between adjacent spiral anchor discs.

The number of the anchor rods is 3, and the anchor rods are arranged at different inclination angles or equal inclination angles.

A first stiffening plate is arranged between the steel bearing platform and the main material of the tower leg, and a second stiffening plate is arranged between the steel bearing platform and the short steel pipe.

The beneficial effects of the utility model are as follows: the group anchor type screw anchor foundation adopting flange connection is simple in structure, all components can be processed in factories, quality of the foundation structure body is guaranteed, field welding and field corrosion prevention can be avoided, foundation design and construction level are effectively improved, and popularization and application of screw anchor foundations are facilitated.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a view from 1-1 of FIG. 1;

FIG. 3 is a schematic view of the flange connection of the embodiment of FIG. 1;

fig. 4 is a view from 2-2 in fig. 3.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In order to avoid field welding, ensure the processing quality of the foundation and reduce the construction difficulty, the utility model provides a group anchor type screw anchor foundation adopting flange connection, as shown in figure 1, comprising: the steel pile cap 3, tower leg main material 7 is connected to steel pile cap 3 top, and fixed a plurality of short steel pipe 4 of steel pile cap 3 below, every short steel pipe 4 all passes through flange 5 and connects stock 1, is provided with a plurality of spiral anchor plate 2 on stock 1.

Further, a group anchor type spiral anchor foundation connected through flanges is adopted, a section of short steel pipe 4 is added between the top of the anchor rod 1 and the steel bearing platform 3, the top of the anchor rod 1 is connected with the short steel pipe 4 through flanges 5, and the leveling of the top of the anchor rod and the connection with the steel bearing platform are achieved. The key point of the embodiment is that the short steel pipe 4 and the steel bearing platform 3 are simulated by using a square paper model, the spatial position relation among all parts of the foundation structure is determined through on-site lofting, and then the square paper model is returned to a factory to process the whole foundation upper structure.

As an improvement of the technical scheme, the flange 5 should be arranged upwards as much as possible on the premise of meeting the design requirement, so as to avoid local earth excavation.

Further, the number of the spiral anchor plates 2 is several, the spiral anchor plates are fixed on the anchor rod along the axial direction of the anchor rod 1, and the adjacent spiral anchor plates are arranged at intervals.

As an improvement of the technical scheme, the number of the anchor rods 1 is multiple, the number is determined according to design calculation, and a schematic plan layout of 3 anchor rods is shown in fig. 2; in addition, the anchor rods are arranged at different inclination angles or equal inclination angles, and the inclination angles are preferably determined according to design calculation. In view of this, any modification or variation to the number of anchors and the inclination angle is considered to be within the scope of the present patent.

Further, a first stiffening plate 8 is arranged between the steel bearing platform 3 and the main tower leg material 7, and a second stiffening plate 6 is arranged between the steel bearing platform 3 and the short steel pipe 4, so that the connection rigidity of the connection node is increased, and the force transfer performance is improved.

Further, the steel bearing platform 3 is welded with the upper tower leg main material 7, the short steel pipes 4 and the corresponding stiffening plates, and is processed in a factory, so that field welding is avoided.

The construction method of the flange-connected group-anchor type screw anchor foundation comprises the following steps:

s1, on-site measurement lofting is carried out to determine screwing positions and angles of all anchor rods, and the anchor rods 1 are screwed to the designed depth in sequence; in order to facilitate the connection of the anchor rod and the upper structure, determining whether local earth excavation is needed according to the position of the flange node;

s2, simulating the short steel pipe 4 by using square paper and fixing the short steel pipe on the top of the anchor rod 1; determining the elevation of the bottom surface of the steel bearing platform 3 through on-site measurement lofting, and cutting square paper at the height; repeating the process until all the check papers on the tops of the anchor rods A, B, C are cut and marked;

s3, simulating the steel bearing platform 3 by using square paper, placing the steel bearing platform on the top surface of the square paper simulating the short steel pipe 4, setting out and determining the placement position of the square paper simulating the steel bearing platform 3 according to information such as foundation setting, and the like on site, and marking the contact position between the square paper, namely the actual connection position of the steel bearing platform 3 and the short steel pipe 4;

s4, returning the square paper to a factory for processing the whole foundation upper structure, and simultaneously welding a tower leg main material 7 with the steel bearing platform 3 for simplifying a tower leg connecting structure; polishing and galvanizing after finishing;

and S5, conveying the foundation upper structure processed in the factory to a construction site for installation, wherein if local earthwork excavation exists, backfilling and tamping are needed, so that the construction operation of the group anchor type screw anchor foundation connected by adopting the flange is completed.

According to the group anchor type screw anchor foundation adopting flange connection, the spatial position relation among all parts of the foundation structure is determined through on-site measurement lofting, then the whole foundation upper structure is processed in a factory, and finally the foundation upper structure is transported to on-site construction and installation, so that the construction difficulty can be greatly reduced.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several changes and modifications can be made without departing from the general inventive concept, and these should also be regarded as the scope of the utility model.

Claims (4)

1. A group-anchored screw anchor foundation employing flange connection, comprising: the steel pile cap (3), tower leg main material (7) are connected to steel pile cap (3) top, and fixed a plurality of short steel pipe (4) of steel pile cap (3) below, every short steel pipe (4) all connect stock (1) through flange (5), are provided with a plurality of spiral anchor disc (2) on stock (1).

2. A group anchor type screw anchor foundation employing flange connection as claimed in claim 1, wherein: the spiral anchor plates (2) are arranged in a plurality, are fixed on the anchor rod along the axial direction of the anchor rod (1), and are arranged at intervals between adjacent spiral anchor plates.

3. A group anchor type screw anchor foundation employing flange connection as claimed in claim 1, wherein: the number of the anchor rods (1) is 3, and the anchor rods (1) are arranged at different inclination angles or equal inclination angles.

4. A group anchor type screw anchor foundation employing flange connection as claimed in claim 1, wherein: a first stiffening plate (8) is arranged between the steel bearing platform (3) and the main material (7) of the tower leg, and a second stiffening plate (6) is arranged between the steel bearing platform (3) and the short steel pipe (4).

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