Anchor rod applied to photovoltaic support

Abstract

An anchor rod applied to a photovoltaic support comprises a fixed or expanded head reinforcement cage, and the reinforcement cage and a poured solidification material are solidified; the solidification material comprises fiber concrete, superfluid concrete, concrete or cement mortar, and the fiber cement mortar and the cement mortar are combined to form the anchor rod with a fixed or expanded head reinforcement cage as a framework; a steel exposed surface is arranged at the front end of the reinforcement cage framework, a steel connector is fixed on the steel exposed surface, and the steel connector is fixed with a photovoltaic support pull rod or a pull rope. The steel connector is a rotary threaded sleeve or one or more U-shaped sleeves and is fixed to the steel exposed face of the reinforcement cage anchor rod in a threaded connection or welding, riveting or buckling mode.

Description

Technical Field

[0001] The utility model relates to an anchor rod system for fixing an enlarged head using a photovoltaic bracket. Background Art

[0002] There are many technologies in the existing anchor rod application, such as the anchor rod for enlarged head steel cage of the applicant, i.e. CN2017103161244 discloses an application of a variable diameter steel cage and anchor rod, including an axial rod, two groups of a plurality of ribs with the same number of roots, and first and second splines. The two groups of a plurality of ribs with the same number of roots and the first and second splines constitute a first variable diameter steel cage unit, the first spline of the variable diameter steel cage unit is fixed to the end of the axial rod, the first and second splines are sleeved on the axial rod or the pile foundation rod, the first and second splines respectively fix the first end of the first group and the second group of ribs surrounding the axial rod, the second end of each rib of the first group is flexibly connected with the second end of a corresponding rib of the second group, the second spline sleeve slides on the axial rod, the second spline before and after sliding respectively corresponds to the original state of the variable diameter steel cage unit and the second diameter state with an enlarged diameter after release, and a limiting or positioning device for the second spline is provided on the axial rod or the pile foundation rod. This variable diameter steel cage skeleton has a good effect. As a tension member that penetrates deep into the ground, the anchor rod is connected to the engineering structure at one end and penetrates deep into the ground at the other end (bottom or far end). The whole anchor rod is divided into a free section and an anchoring section. The free section refers to the area where the tension at the anchor rod head is transmitted to the anchor body, and its function is to apply prestress to the anchor rod; the anchoring section refers to the area where the cement slurry bonds the prestressed tendons to the soil layer, and its function is to increase the bonding friction between the anchor body and the soil layer, increase the bearing pressure of the anchor body, and transmit the tension of the free section to the deep soil.

[0003] Whether it is an enlarged head or a non-enlarged head steel cage anchor rod, especially the former, when it is used for tensile resistance, the steel cage is located deep in the stratum. When the steel cage is lowered into the deep stratum with the anchor rod, a limiting device needs to be set, otherwise the steel cage cannot be lowered to the predetermined position. The limiting device in the prior art adopts a nut or an anchor (limiting the pressure plate and the steel cage from the upper part of the pressure plate); and there is also a nut under the pressure plate. The nut is generally screwed on the main reinforcement rod of the fine-rolled threaded steel. The nuts that limit the pressure plate at the upper and lower parts are generally the same nut, which is required to withstand the tensile force of the pressure plate and the entire anchor rod. The cost is relatively high and there is a certain amount of installation work.

[0004] At present, the application of enlarged head anchor rods in photovoltaic projects is mainly for the anchoring of photovoltaic brackets. Generally speaking, the photovoltaic brackets that need to be fixed are up to 20 meters long and 1-2 meters wide. The rod body of the enlarged head anchor rod is mostly made of high-strength threaded steel bars (steel ropes, steel cables or polymer fiber materials can also be used), and in previous applications, the main steel bars of the enlarged head anchor rod are exposed to the ground for a section and then connected and fixed with the flexible (generally steel ropes, steel cables) photovoltaic bracket tie rods. However, when the upper structure is subjected to external loads (mainly wind loads), the section of the anchor rod (steel bar) exposed to the ground is also repeatedly subjected to non-directional forces, which can easily cause the anchor rod (steel bar) exposed to the ground to break; there have been many cases of such accidents, and solving this problem is the task of this application. Summary of the invention

[0005] The purpose of the utility model is to provide a steel cage with a limiting device (i.e., the skeleton of the anchor rod) and an anchor rod, especially a nut at the bottom that bears the tensile force of the pressure plate and the entire anchor rod, and at the same time has a device for limiting the upward movement of the steel cage, and the anchor rod body and the steel cage with variable diameter and constant diameter have good integrity. In the drawings, we have carried out local reinforcement treatment on the upper end of the anchor rod, and protected the anchor rod body in the reinforcement body, and also made different connection forms.

[0006] The technical solution of the utility model is a method of fixing or enlarging the head anchor rod using a photovoltaic support, comprising a fixed or enlarged head steel cage, wherein the steel cage and the poured solidifying material are solidified; the solidifying material

[0007] It includes fiber concrete, superfluid concrete, concrete or cement mortar, fiber cement mortar, cement slurry, forming a fixed or enlarged head steel cage as the framework of the anchor rod; the front end of the steel cage framework anchor rod is provided with a steel exposed surface, and a steel (may also be polymer fiber) connector is fixed on the steel exposed surface, and the steel connector is fixed to the flexible (or rigid) photovoltaic support rod or rope. The flexible rope is generally a steel rope or cable.

[0008] The steel connector is a rotating threaded sleeve (ring or spring) or one or more U-shaped sleeves fixed to the exposed steel surface of the steel cage anchor by threaded connection or welding, riveting, snap connection, etc.

[0009] The upper end of the anchor rod, i.e. the front end steel connector area of ​​the reinforcement cage framework anchor rod, can be a local reinforcement area.

[0010] The steel connector is a connector for connecting the end of the steel cage anchor rod or the anchor; the structure of the connector of the anchor is shown in the figure (the figure is a schematic example), which is provided with a connecting device fixed to the anchor pad in the anchor, and the connecting device is a U-shaped buckle kit; or the steel connector is a rotating threaded sleeve (ring or spring) connected to the nut at the end of the steel cage anchor rod.

[0011] The spirally fixed threaded collar connected to the end of the steel cage anchor is a structure welded on the nut of the fine-rolled steel bar (lengthened and thickened). A U-shaped buckle kit (connecting frame) or a rotating threaded collar (ring or spring) connected to the nut at the end of the steel cage anchor is directly welded on the nut of the fine-rolled steel bar.

[0012] After the steel connector is fixed, it can also be fixed to the anchor rod as a whole by concrete.

[0013] The threaded rotating sleeve ring may be a U-shaped buckle set (connecting frame) that can be welded, or a rotating threaded sleeve (ring or spring) that is connected to the nut at the end of the steel cage anchor rod.

[0014] The steel connector is fixed to the flexible (generally steel rope, steel cable) photovoltaic support rod or rope. The upper end of the anchor rod is partially reinforced, mainly because the main body composed of the steel cage and the solidified material is an integral structure, which will not cause the extended anchor rod to expose the individual steel bars to be subjected to the stress of the photovoltaic support rod or rope. The anchor rod of the present invention can also be a steel cage structure composed of steel cables or steel ropes, which can be a steel cage with a stress structure or a steel cage without a stress structure, and steel cages of equal diameter or variable diameter can also be used.

[0015] A feasible solution is to fix steel connectors on prestressed anchors and other anchors and then fix them with flexible (usually steel ropes or cables) photovoltaic support rods or ropes.

[0016] Beneficial effects: The utility model provides an anchor rod steel cage skeleton, and the other end (bottom end or distal end) of the anchor rod fixes the steel cage and the anchoring section that is in place and deep in the stratum increases the solidification effect of the anchor body and the soil layer in the area where the prestressed tendons or non-prestressed enlarged heads are bonded to the solidifying materials (concrete, etc.) and the rock soil layer. Only the steel cage or prestressed anchor and other anchor surfaces are fixed with steel connectors, and the steel connectors are fixed on the concrete anchor rod as a whole. The integral connection with the anchor rod is good, and the photovoltaic bracket that can be fixed is up to 20 meters long and 1-2 meters wide. When the main reinforcement of the steel cage is exposed to a section of the upper structure and is subjected to external force loads (mainly wind loads), the section of the anchor rod (rebar) exposed to the ground is subjected to repeated non-directional forces, which can easily cause the anchor rod (rebar) exposed to the ground to break; the utility model can overcome this difficulty. The rod body of the enlarged head anchor rod is made of high-strength threaded steel bars or stress-structured anchor rods (either steel strands or wire ropes). The main steel bars (steel strands) of the anchor rod do not protrude from the ground (one section) and are then connected and fixed with the flexible (usually steel ropes or cables) photovoltaic bracket pull rods through steel connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model.

[0018] Figure 2a , 2b, 2c, and 2d are schematic diagrams of the overall structure being installed on the ground after the concrete in the four reinforcement areas solidifies;

[0019] Figure 3 The utility model is a practical connection structure.

[0020] Figure 4a , 4b , 4c are three practical connection structures of the steel connector of the utility model. DETAILED DESCRIPTION

[0021] Figure 1 This is a schematic diagram of the structure of the utility model. The front end portion 1-2 of the anchor rod 1 (rebar or rebar cage) may be provided with a reinforcement area, and the reinforcement area is used to reinforce the end of the rebar cage. The reinforcement structure typically adds woven steel bars or fibers at the cage to make the overall structure of the concrete and the cage better, so as to facilitate the reinforcement of the upper rebar cage structure. The area that is directly subjected to force and is easily damaged; the reinforced anchor rod end prevents the upper structure from being subjected to repeated and non-directional force damage to the anchor rod body caused by external forces (such as wind loads, etc.).

[0022] If prestressed anchor rods are used, reaction supports for testing / applying prestress should be set up in advance.

[0023] The anchor rod body 1-1 (main steel bar) can be one or more; the material of the rod body includes high-strength threaded steel bars, ordinary steel bars, steel strands (steel ropes), glass fibers, carbon fibers, basalt fibers, various steel rods, pipes, springs, etc.

[0024] Figure 2a , 2b 2c and 2d are schematic diagrams of the installation of the overall structure on the ground after the concrete of the four reinforcement areas solidifies, exposing different areas of the ground, but not the rods of the anchor rods; in the figure, the steel cage solidifies with the poured solidifying materials 1-3; the solidifying materials include fiber concrete, superfluid concrete, concrete or cement mortar, fiber cement mortar, and cement slurry to form an anchor rod with a fixed or enlarged head steel cage as a skeleton; the upper end of the steel cage (anchors or steel cages are provided at the anchor rods) is provided with steel bars (exposed surface), and a steel connector is fixed on the steel exposed surface, and the steel connector 3 is fixed to the flexible (generally steel rope, steel cable) photovoltaic bracket rod or rope 4 (also through a U-shaped sleeve 4-1), photovoltaic bracket 6. The steel exposed surface itself can be the periphery of an anchor pad. Ground 7. Spring-type pull rod 4-2.

[0025] The upper end of the anchor rod is locally reinforced in the steel connector area. The local reinforcement area 1-5 is solidified into a whole with the concrete through a (small) steel cage (1-6), stirrups, steel (fiber) mesh, sleeve or a combination of the above structures connected and fixed to the end of the main reinforcement.

[0026] The spirally fixed threaded collar connected to the nut at the end of the steel cage can be a structure welded on the nut of the fine-rolled steel bar (lengthened and thickened), and the nut of the fine-rolled steel bar can also be directly welded to a U-shaped buckle kit (connecting frame).

[0027] After the steel connector is fixed, it is also fixed to the integral concrete of the anchor rod by concrete solidification.

[0028] The steel connector 3 is a connector for connecting the end anchor of the main steel bar 1-1 of the steel cage; the structure of the connector of the anchor is as follows, which is provided with a connecting device fixed to the anchor pad in the anchor, and the connecting device is a U-shaped buckle kit; or the steel connector can also be a threaded rotating ring connecting the nut at the end of the steel cage, and the threaded rotating ring is welded to a U-shaped buckle kit (connecting frame).

[0029] The steel connector is a threaded rotating ring, and a threaded rotating ring is fixed to the nut of the fine-rolled steel bar as the steel connector; or a prestressed anchor is used to fix a connecting piece on the anchor pad outside the anchor plate as the steel connector.

[0030] Specifically, the connecting parts include welded U-shaped buckle kits, welded connection stop brackets, etc.

[0031] The steel connector 3 is a rotating threaded collar or one or more U-shaped sleeves 3-1 fixed to the exposed steel surface of the steel cage by thread connection or welding.

[0032] The spirally fixed threaded collar connected to the nut at the end of the steel cage (preferably an extended and thickened nut) can be a structure welded on the (extended and thickened) nut of the fine-rolled steel bar, and the U-shaped buckle kit (connecting frame) can also be directly welded on the nut of the fine-rolled steel bar: the main reinforcement of the anchor rod can be a fine-rolled steel bar (typically with a diameter of 32mm), and the front end of the fine-rolled steel bar can be provided with a (extended) nut to be tightened and fixed, and a collar with an internal thread is engaged and connected on this extended nut (external thread machined on the outer side of the nut); the U-shaped buckle kit is fixed on the outside of the collar.

[0033] The end of the steel cage is fixed with a prestressed anchor, a prestressed clip and an anchor connector. Specifically, the anchor connector is a connection device fixed to the anchor plate in the anchor, such as a U-shaped sleeve 3-1 piece, a spiral connection between the threaded ring and the nut, a threaded ring, a nut of the finished steel bar, and a stop frame directly welded on the nut of the finished steel bar;

[0034] The nut of the finished rolled steel bar is fixed with a connector or a prestressed anchor, prestressed clip and anchor connector. Specifically, the anchor connector is a connection device fixed to the anchor plate in the anchor, such as a U-shaped buckle kit, a spiral connection between a threaded ring and a nut, a threaded ring, a nut of the finished rolled steel bar, and a stop bracket directly welded on the nut of the finished rolled steel bar; Reference Figure 4a , 4b4c. Another structure that can be designed is that the end of the tie rod has its own thread, and the tie rod can be directly connected to the U-shaped buckle kit or connected with an anchor.

[0035] The variable diameter steel bar cage (one main bar structure) adopted in the present application can refer to several prior applications of the present applicant, including a group of vertical bars, an axial rod (main bar), at least two groups of a plurality of bars of the same number and at least two splines (circular fixed connectors), a group of vertical bars has the same number of bars as each group and surrounds the axial rod, the spline is sleeved on the axial rod or the pile foundation rod, the two splines respectively flexibly fix the first ends of the first group and the second group of bars surrounding the axial rod, the second end of the bar is flexibly fixed on the vertical bar, the lower end has a pressure plate and a nut, the pressure plate is fixed to the steel bar cage, the main bar is a fine-rolled threaded steel bar, the nut matches the thread of the fine-rolled threaded steel bar, the pressure plate is a metal plate, a hole is provided in the center of the pressure plate, the hole is a smooth round surface or a threaded hole matching the fine-rolled threaded steel bar, below the pressure plate are nuts, plates with threads, flange nuts, nuts and plates combined to take into account both anchoring and limiting components, the pressure plate is fixed to the nuts.

[0036] Ways to fix the pressure plate and the nut: welding, bolt connection, riveting, flexible connection buckle, etc. The nut and the pressure plate can be fixed and then placed in the position in the drilled hole.

[0037] The axial rod is the rod body of the anchor rod, which may be a main steel bar or a sleeve may be arranged on the main steel bar.

[0038] It is also possible for multiple parallel main steel bars to form an anchor rod.

[0039] The steel cage can be covered with a bladder bag.

[0040] The materials of the photovoltaic bracket used to fix the enlarged head anchor rod and various components include but are not limited to: carbon fiber, basalt fiber, glass fiber, aramid fiber glass, glass fiber reinforced resin, resin, geotextile, canvas, ultra-high molecular weight polyethylene fiber, boron olefins, polytetrafluoroethylene, graphene, carbon element-related materials and their composite materials, polymers, polymer materials, nanomaterials, steel, other metals, composite metals, metal materials and non-metallic materials, etc.

[0041] The working process of the utility model is as follows: the rod body in the steel cage of the utility model can be made of finely rolled steel bars, steel strands, basalt fiber, glass fiber, carbon fiber, fiber reinforced composite (FRP) materials, etc., and is formed into a whole after concrete casting. After the anchor rod and the steel connector are installed as a whole, they are installed with the flexible photovoltaic bracket pull rod or rope.

[0042] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An application of photovoltaic support anchor rod, characterized in that: It includes a fixed or enlarged head steel cage, which solidifies with the poured solidifying material; the front end of the steel cage skeleton anchor is provided with a steel exposed surface, a steel connector is fixed on the steel exposed surface, and the steel connector is fixed to the flexible or rigid photovoltaic support rod or rope; the steel connector is a rotating threaded sleeve or one or more U-shaped sleeves fixed to the steel exposed surface of the steel cage anchor by threaded connection or welding, riveting, or snap connection.

2. The photovoltaic support anchor rod according to claim 1 is characterized in that: The upper end of the anchor rod, i.e. the front end steel connector area of ​​the steel cage frame anchor rod, is the local reinforcement area.

3. The photovoltaic support anchor rod according to claim 1 is characterized in that: The steel connector is a connector for connecting the end of the steel cage anchor rod or the anchor; the structure of the connector of the anchor is as follows: it is provided with a connecting device fixed to the anchor pad in the anchor, and the connecting device is a U-shaped buckle kit; or the steel connector is a rotating threaded sleeve connecting the nut at the end of the steel cage anchor rod.

4. The photovoltaic support anchor rod according to claim 1 is characterized in that: The rotating threaded sleeve connected to the end of the steel cage anchor rod is a structure welded on the nut of the finely rolled steel bar. The nut of the finely rolled steel bar is directly welded with a U-shaped buckle set or a rotating threaded sleeve connected to the nut at the end of the steel cage anchor rod.

5. The photovoltaic support anchor rod according to claim 1 is characterized in that: The rotating threaded sleeve can be used to weld U-shaped buckle sets or connect the end nuts of steel cage anchor rods.

Images