Anti-shearing, anti-bending and anti-fatigue anchor rod

Abstract

A shear-resistant, bending-resistant and fatigue-resistant anchor rod 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; the front end ground extending part of the main reinforcement of the reinforcement cage framework anchor rod is connected with a shear-resistant, bending-resistant and fatigue-resistant anchor rod main reinforcement rod body through a nut.

Description

Technical Field

[0001] The utility model relates to an anchor rod component, in particular to an anchor rod used for fixing a photovoltaic support. Background Art

[0002] There are already a variety of technologies in the existing anchor rod application, such as the applicant's enlarged head steel cage application anchor rod, that is, CNZL2017103161244 discloses an application of a variable diameter steel cage and anchor rod, and the applicant's CN201721149658.4 is a prefabricated prestressed anchor rod member, which is formed by wrapping and solidifying the main reinforcement applied by prestressing, including but not limited to concrete, cement mortar, cement slurry or other curable materials to form a prefabricated prestressed anchor rod member; the main reinforcement is steel bar, and steel bar reinforcement materials can be selected and configured, and the reinforcement materials are including but not limited to steel cage, stirrups, steel sleeves, wire mesh cages, pressure plates, pressure flanges, etc.; the main steel bars and the configured steel bar reinforcement materials are solidified together.

[0003] CN202120971151.7 discloses an anti-corrosion water-stop anchor rod, comprising an anchor rod body and an anchoring structure at the top, wherein the anchor rod body is the main steel bar, and the main steel bar adopts bonded or unbonded fine-rolled threaded steel bars, steel strands, and prestressed tension rods, the top of the anchor rod member is anchored to the bottom plate of the building, and the bottom of the anchor rod member is anchored to the straight-through section or the enlarged head section anchor head concrete solidification material, and the concrete solidification material is combined with the anchor head and the main steel bar to form an anchor pile system; the anchoring structure at the upper end of the main steel bar adopts Anchor the structure with a three-piece set of high-strength nuts or a three-way high-strength nut or a high-strength nut flange and pour concrete solidification material; the enlarged head section is an expandable end plate, a ground anchor, a pressure plate, a fixed diameter anchor head or a root-shaped enlarged head, a variable diameter steel cage, a fiber cage or a capsule-type or combined capsule-type enlarged head; a water-swellable sealing material sealing ring or a sealing pad is provided on the main steel bar of the anchor rod at the top and bottom anchorage of the anchor rod member or at the junction of the bottom of the existing anchor rod member and the straight-through section or the enlarged head section anchor head.

[0004] Whether the anchor rod is used for the steel cage with an enlarged head or a non-enlarged head, 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 to 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.

[0005] 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. High-strength threaded steel bars or steel strands are often used for the anchor rod body, but high-strength threaded steel bars are not easy to bend, and they are brittle and easy to break when they are affected by external forces and have an inclination angle; while steel strands are very flexible but too weak in rigidity; therefore, high-strength threaded steel bars or steel strands can no longer meet the application of anchor rod bodies, especially in photovoltaic projects and other fields where the anchor rod angle requirements are very strict. 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 support rod. However, when the upper structure is subjected to external force 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. Utility Model Content

[0006] The utility model aims to provide an anchor rod which is resistant to shearing, bending and fatigue, especially an anchor rod used for fixing photovoltaic brackets, etc. The upper end of the anchor rod is reinforced, and the rod body of the ordinary anchor rod is protected in the reinforced body.

[0007] The technical solution of the utility model is a shear-resistant, bending-resistant and fatigue-resistant anchor rod, comprising a fixed or enlarged head steel cage, the steel cage and the poured solidification material are solidified; the solidification material comprises fiber concrete, superfluid concrete, concrete or cement mortar, fiber cement mortar, cement slurry, and is combined to form an anchor rod with a fixed or enlarged head steel cage as a skeleton; the main steel bars of the steel cage skeleton anchor rod, the front end of the ground extension part is connected with the shear-resistant, bending-resistant and fatigue-resistant anchor rod main steel bar rod body through nuts, the uppermost end of the shear-resistant, bending-resistant and fatigue-resistant anchor rod main steel bar rod body is provided with a steel exposed surface, and a steel (may also be polymer fiber) connector is fixed on the steel exposed surface; the steel connector is fixed with a flexible (or rigid) photovoltaic bracket pull rod or pull rope. The flexible rope is generally a steel rope or steel cable.

[0008] The uppermost shear-resistant, bending-resistant, and fatigue-resistant anchor rod body is made of (but not limited to) spring steel (manganese steel), high-strength alloy steel round steel rod, etc. The round steel rod is connected to the main reinforcement of the steel cage with a nut. The diameter of the spring steel round steel rod is the same as that of the medium-high-strength threaded steel bar, and it has both the rigidity of the above-mentioned medium-high-strength threaded steel bar and the flexibility of the steel strand. However, it currently includes but is not limited to spring steel, high-strength alloy steel and other round steel rods (columns). In photovoltaic, support, anti-floating and other projects involving anchor rods, when it is not convenient to use high-strength threaded steel bars, the shear-resistant, bending-resistant, and fatigue-resistant anchor rod of the present invention has a good effect. This type of steel rod (rod, column) material is now produced or processed with threads, so that it can exert its bending, shear, and fatigue resistance characteristics when applied to the anchor rod body, so as to facilitate better application in photovoltaic and other projects with strict requirements on the anchor rod angle.

[0009] Beneficial effect: The present invention does not use conventional high-strength threaded steel bars or steel strands, because they are relatively brittle and easily break when affected by external forces and have an inclination angle; and the steel strands have good flexibility but weak rigidity; therefore, high-strength threaded steel bars or steel strands can no longer meet the application requirements of anchor rod bodies, especially in fields such as photovoltaic projects that have very strict requirements on anchor rod angles.

[0010] The shear-resistant, bending-resistant and fatigue-resistant anchor rod body of the utility model is made of (but not limited to) spring steel, leaving a steel connector for fixing the surface of the steel cage or prestressed anchor and other anchors, and the steel connector is fixed on the concrete anchor rod to form a whole. The shear-resistant, bending-resistant and fatigue-resistant anchor rod body of the utility model enlarged head anchor rod is connected and fixed with a flexible (generally steel rope, steel cable) photovoltaic bracket pull rod through a steel connector. 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. Because the steel cage is subjected to external loads (mainly wind loads), it will be subjected to repeated non-directional forces. The good toughness of the present invention can withstand it, and it is not easy to cause the anchor rod (steel bar) exposed on the ground to break; the service life of the anchor rod is long and the reliability is greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1-Figure 5 The utility model is a schematic diagram of a rod structure of a main anchor rod steel bar that is resistant to shear, bending and fatigue, corresponding to a thread at one end ( Figure 1 ), threaded at both ends ( Figure 2 )、Intermediate thread( Figure 3 ), multiple thread ( Figure 4 ), full rod thread ( Figure 5 ) of the rod body;

[0012] Figure 6 It is a schematic diagram of the application structure of the anchor rod main reinforcement rod body of the utility model which is resistant to shear, bending and fatigue. DETAILED DESCRIPTION

[0013] Figure 1-Figure 5 The anchor rod body with medium shear resistance, bending resistance and fatigue resistance is generally threaded at one end or both ends, or all ends, to facilitate threaded connection with the adjacent lower threaded steel bar (short nut or long nut is acceptable).

[0014] Figure 6 Application of anchor rod body with medium shear, bending and fatigue resistance as tension anchor rod: 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 rod by threaded connection or welding, riveting, buckling, etc. The upper end of the anchor rod, i.e. the front end of the steel cage skeleton anchor rod, can be a local reinforcement area.

[0015] 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.

[0016] 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 set (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.

[0017] After the steel connector is fixed, it can also be fixed to the anchor rod as a whole by concrete.

[0018] The threaded rotating sleeve ring can be a U-shaped buckle set (connecting frame) that can be welded, or it can be a rotating threaded sleeve (ring or spring) connected to the nut at the end of the steel cage anchor rod.

[0019] 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.

[0020] 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.

[0021] The end of the anchor rod body is an anchor rod body 1-1 (main steel bar) which is resistant to shear, bending and fatigue and is threadedly connected to the lower high-strength steel bar.

[0022] The front end portion 1-2 of the anchor rod 1 (rebar or rebar cage) may be provided with a reinforcement area, which is used to reinforce the end of the rebar cage. The reinforcement structure typically adds woven steel bars or fibers at the cage to improve the overall structure of the concrete and the cage, thereby facilitating the strengthening of the upper rebar cage structure that is directly subjected to stress and easily damaged. The reinforced anchor rod end prevents the upper structure from being subjected to repeated and non-directional stress damage to the anchor rod body caused by external forces (such as wind loads, etc.).

[0023] If prestressed anchor rods are used, reaction supports for testing / applying prestress should be set up in advance.

[0024] 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. Ground 7.

[0025] After the steel connector is fixed, it is also fixed to the integral concrete of the anchor rod by concrete solidification.

[0026] The steel connector 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).

[0027] 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.

[0028] Specifically, the connecting parts include welded U-shaped buckle kits, welded connection stop brackets, etc.

[0029] The steel connector is a rotating threaded collar or one or more U-shaped sleeves 4-1 fixed to the exposed steel surface of the steel cage by thread connection or welding.

[0030] 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 (typical diameter 32mm), and the front end of the fine-rolled steel bar can be provided with a (extended) nut to tighten and fix it, and a collar with an internal thread is engaged and connected on this extended nut (the outer side of the nut has an external thread machined on it); the U-shaped buckle kit is fixed on the outside of the collar.

[0031] 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, a spiral connection between a threaded ring and a nut, a threaded ring, a nut of a finished steel bar, and a stop frame directly welded on the nut of the finished steel bar;

[0032] The nut of the fine-rolled steel bar is fixed with a connector or a prestressed anchor, a prestressed clip and an anchor connector. Specifically, the anchor connector is a connecting device provided in the anchor that is fixed to the anchor plate, such as a U-shaped buckle kit, a spiral connection between a threaded ring and a nut, a threaded ring, and a nut of the fine-rolled steel bar. A connection stop frame is directly welded on the nut of the fine-rolled steel bar.

[0033] The steel cage can be covered with a bladder bag.

[0034] The photovoltaic bracket is used to fix the enlarged head anchor rod, and the materials of various components include carbon fiber, basalt fiber, glass fiber, aramid fiber, 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.

[0035] 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 pull rope.

[0036] 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 anchor rod that is resistant to shear, bending and fatigue, characterized in that: It includes a fixed or enlarged head steel cage, which solidifies with the poured solidifying material; an anchor rod with a fixed or enlarged head steel cage as a skeleton; the main steel bars of the steel cage skeleton anchor rod, the front end protruding from the ground is connected with a shear-resistant, bending-resistant and fatigue-resistant anchor rod main steel bar rod body through nuts; one end, both ends or the entire rod of the shear-resistant, bending-resistant and fatigue-resistant anchor rod body at the top of the anchor rod is threaded.

Images