CN218466526U - Plug-in type connecting joint of spiral anchor foundation - Google Patents

Abstract

A plug-in type connecting joint of a spiral anchor foundation comprises an anchor rod and anchor disks positioned at two ends of the anchor rod, wherein the anchor rod comprises a front section of anchor rod and a rear section of anchor rod which have the same pipe diameter, the front section of anchor rod is fixedly connected with a transition section, the rear section of anchor rod is movably connected with an insertion section, and the transition section is connected with the insertion section; the transition section is of a reducing structure. The utility model discloses structural style is simple, can avoid conventional bolted connection to twist the disturbance of the end that the in-process cover exceeded the steel sleeve pipe outside the joint, bolt to the earth body around the stock soon, avoids producing big departure district or deficient soil district between stock and the earth body, guarantees the level and the vertical bearing capacity of stock part to improve the bearing capacity performance and the design reliability level on spiral anchor basis.

Description

Plug-in type connecting joint of spiral anchor foundation

Technical Field

The utility model belongs to transmission line basis field, concretely relates to bayonet attach fitting in spiral anchor basis.

Background

The screw anchor foundation is an anchoring structure body which is composed of screw anchors, an upper bearing platform and other components and mainly utilizes deep soil body to resist the action of an upper structure. In recent years, the spiral anchor foundation is widely tried out in the field of power transmission line iron tower foundations as a new technology.

At present, the spiral anchor foundation still has some problems. As one of design optimization ideas of the spiral anchor foundation, the improvement of the bearing capacity performance of a single spiral anchor foundation is a key problem, and the diameter of an anchor disc of a single anchor and the length of an anchor rod are required to be increased. The spiral anchor rod is usually processed by a single steel pipe and is limited by the factory length of the steel pipe or the clearance of a drilling and anchoring machine, and the anchor rod inevitably needs to reach the length required by design through a connecting joint. The conventional connecting joint is usually connected by a bolt and an outer sleeve steel sleeve, and the soil body around the anchor rod is ground by a pier head and a nut of the bolt in the construction screwing process, so that the soil body is disturbed, the partial bearing capacity of the anchor rod is not favorably exerted, the actual construction effect and the design calculation result deviate, and the essential safety of the foundation is influenced.

CN110030025A discloses a self-expanding type pipe seam anchor rod for large deformation of surrounding rock and its preparation and application method, the anchor rod is formed from rod body in which self-expanding explosive column is placed and tray, on the pipe wall of the rod body contacted with self-expanding explosive column a resistance-increasing seam is cut, on the pipe wall of the rod body rear portion of self-expanding explosive column an annular resistance-increasing groove is set, the rear end of threaded rod series-connected with self-expanding explosive column is passed through the tray and connected with fastening nut, and the tray is not fixedly connected with rod body. When in use, the self-expanding explosive column is soaked in water, then the anchor rod is inserted into the drilled hole, and the fastening nut is screwed down to ensure that the tray is tightly attached to the wall of the surrounding rock; the self-expansion anchoring agent is utilized to generate radial expansion pressure through volume expansion in a hydration reaction to play an anchoring role; when the surrounding rock is greatly deformed, the deformation force of the rock body is applied to the self-expansion explosive column through the tray, the fastening bolt and the threaded rod, the self-expansion explosive column is subjected to friction sliding with the rod body when the stress exceeds the designed resistance, the constant-resistance yielding can be kept through the resistance-increasing seam and the resistance-increasing groove in the sliding process, and the anchoring effect can be continuously played after the displacement. Although the patent relates to a connection anchor rod, the principle of the connection mode adopts external pressure, is irrelevant to the anchor rod, and is not suitable for the anchor rod of a power transmission line foundation.

SUMMERY OF THE UTILITY MODEL

The technical problem that utility model will solve is: how to realize the plug-in connection of the anchor rod provides a plug-in connection joint of a spiral anchor foundation.

The technical scheme of the utility model specifically does:

a plug-in type connecting joint of a spiral anchor foundation comprises an anchor rod and anchor disks positioned at two ends of the anchor rod, wherein the anchor rod comprises a front section of anchor rod and a rear section of anchor rod which have the same pipe diameter, the front section of anchor rod is fixedly connected with a transition section, the rear section of anchor rod is movably connected with an insertion section, and the transition section is connected with the insertion section; the transition section is of a reducing structure.

The transition section is connected with the front anchor rod through a butt welding seam.

The outer diameter of the insertion section is slightly smaller than the inner diameter of the rear anchor rod, and the insertion section and the rear anchor rod are connected through a pin.

The corresponding position of insertion section and back anchor rod sets up the bolt hole, sets up the pin in the bolt hole, and the pin both ends flush with the stock crust, and the gap between the bolt hole is glued or is set up the draw-in groove mode through the packing structure and fix.

The outer diameter of the insertion section is 2 to 3mm smaller than the inner diameter of the rear anchor rod.

The wall thickness of the steel pipes of the transition section and the insertion section is larger than that of the anchor rod.

The transition section realizes the gradual change of the diameter and the thickness by utilizing the steel pipe of the insertion section through hot working, and the transition section and the steel pipe are of an integrated structure.

The beneficial effects of the utility model are that: the structure type is simple, the disturbance of the conventional bolt connection on the soil body around the anchor rod by the end socket of the steel sleeve pipe sleeved outside the joint in the screwing process and the bolt exceeding the steel sleeve pipe can be avoided, a large separation area or a deficient soil area is avoided from being generated between the anchor rod and the soil body, the level and the vertical bearing capacity of the anchor rod part are ensured, and therefore the bearing capacity performance and the design reliability level of the spiral anchor foundation are improved.

Drawings

Fig. 1 is a schematic structural view of a plug-in type connecting joint of a spiral anchor foundation provided by the present invention;

fig. 2 is a schematic structural view of a pin fixed by a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1, a plug-in type connection joint of spiral anchor foundation includes stock 2 and the anchor plate 1 that is located 2 both ends of stock, and stock 2 includes the same front section stock 21 and the back section stock 22 of pipe diameter, and wherein, front section stock 21 connects changeover portion 3, and back section stock 22 connects insertion section 4, the gradual change of diameter and thickness is realized through hot working to the steel pipe that 3 usable insertion sections 4 of changeover portion, and the two structure as an organic whole, then with front section stock 21 is through butt weld connection.

Furthermore, the transition section 3 is of a reducing structure, and the diameter of the front section anchor rod 21 is gradually changed to the diameter of the insertion section 4; that is, the front end of the transition section 3 is smoothly transited to the front anchor rod 21, and the rear end thereof is inserted into the insertion section 4.

Further, the outer diameter of the insertion section 4 is slightly smaller than the inner diameter of the rear anchor rod 22, and bolt holes are arranged at corresponding positions of the insertion section and the rear anchor rod and connected through a pin 5; 5 both ends of pin flush with the stock crust, for preventing not hard up droing in the work progress, it is fixed through filling structural adhesive or modes such as setting up the draw-in groove with the gap between the bolt hole. As shown in fig. 2, in order to fix the steel plate in the slot, a steel plate with a corresponding size is wedged in the slot. It should be noted that the manner of fixing the pin is various, and various modifications and variations made thereto are intended to fall within the scope of the present invention. Further, the diameter and the number of the pins 5 are determined by calculation according to actual conditions, and may be two, three or more pins 5.

Further, the outer diameter of the insertion section 4 is smaller than the inner diameter of the rear anchor rod 22 by 2-3 mm, so that insertion connection is realized.

The wall thickness of the steel pipe of the transition section 3 and the wall thickness of the steel pipe of the insertion section 4 are larger than that of the anchor rod 2, and the specific thickness is determined through design calculation according to geological conditions at different positions.

Further, the lengths of the front anchor rod 21 and the rear anchor rod 22 are limited by the delivery length of the steel pipe, and the screw anchor length required by the design needs to be achieved through the connecting joint.

The application method of the embodiment comprises the following steps: firstly screwing the spiral anchor disc 1 of the rear anchor rod 22 into the soil by using an anchor screwing machine, and reserving the upper end of the rear anchor rod 22; welding the front anchor rod 21 to the transition section 3, then inserting the transition section 3 into the insertion section 4, inserting the insertion section 4 into the rear anchor rod 22, adjusting the position so that bolt holes are aligned, then penetrating the pin 5 into the bolt holes and fixing the bolt holes, and continuously screwing by using an anchoring machine until the depth required by the design is reached.

While the preferred embodiments of the present invention have been described, it should be understood that various changes and modifications may be made therein by those skilled in the art without departing from the general concept of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.

Claims (7)

1. The utility model provides a bayonet attach fitting of spiral anchor basis, includes stock (2) and is located anchor disc (1) at stock (2) both ends, its characterized in that: the anchor rod (2) comprises a front anchor rod (21) and a rear anchor rod (22) which have the same pipe diameter, wherein the front anchor rod (21) is fixedly connected with the transition section (3), the rear anchor rod (22) is movably connected with the insertion section (4), and the transition section (3) is connected with the insertion section (4); the transition section (3) is of a reducing structure.

2. A screw anchor base plug-in connector according to claim 1, wherein: the transition section (3) is connected with the front anchor rod (21) through butt welding.

3. A screw anchor base plug-in connector according to claim 1, wherein: the outer diameter of the insertion section (4) is slightly smaller than the inner diameter of the rear anchor rod (22), and the insertion section and the rear anchor rod are connected through a pin (5).

4. A screw anchor base plug-in connector according to claim 3, wherein: insert section (4) and back anchor rod (22) and correspond the position and set up the bolt hole, set up pin (5) in the bolt hole, pin (5) both ends flush with the stock crust, and the gap between the bolt hole is glued or is set up the draw-in groove mode through filling the structure and fix.

5. A screw anchor base plug-in connector according to claim 3, wherein: the outer diameter of the insertion section (4) is 2 to 3mm smaller than the inner diameter of the rear anchor rod (22).

6. A screw anchor base plug-in connector according to claim 1, wherein: the wall thickness of the steel pipe of the transition section (3) and the insertion section (4) is larger than that of the anchor rod (2).

7. A screw anchor foundation plug-in connector as defined in claim 1, wherein: the transition section (3) realizes gradual change of the diameter and the thickness by utilizing the steel pipe of the insertion section (4) through hot working, and the transition section and the steel pipe are of an integrated structure.

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