CN216379511U - Prestress and non-prestress heat-shrinkable sleeve anti-corrosion anchor rod - Google Patents

Abstract

A kind of prestressed and non-prestressed thermal shrinkage bush anticorrosion anchor rod, the main steel reinforcement of the anchor rod is 1-5, when the main steel reinforcement adopts the coupling nut to connect, the coupling nut connects the main steel reinforcement of the anchor rod to the rated length, the main steel reinforcement of the anchor rod is the finish rolling deformed steel bar; the nut connector or/and the main reinforcing steel bar of the anchor rod are/is sleeved with a thermoplastic film sleeve, and the main reinforcing steel bar and the connecting nut of the thermoplastic film sleeve are poured with concrete curing materials.

Description

Prestress and non-prestress heat-shrinkable sleeve anti-corrosion anchor rod

Technical Field

The utility model relates to an anti-corrosion structure of a connection structure of an anchor rod and the anchor rod, in particular to an anchor rod of a prestressed and non-prestressed anchor rod main rib sleeved by a heat-shrinkable sleeve.

Background

The types of anchor rods are various, such as anchor rods with single main reinforcing steel bars and a plurality of main reinforcing steel bars; the anchor rods adopting the main reinforcing steel bars have more and more purposes, and particularly have higher and higher requirements on corrosion resistance of the anchor rods and connecting structures when being used in a large amount in the construction of buildings, roads and tracks; the anti-corrosion and waterproof requirements of the anti-floating anchor rod are high, and the anti-floating anchor rod is difficult to treat due to the fact that the anti-floating anchor rod is large in number and small in diameter, and is always a pain point for anchor rod application. The anti-floating anchor rod durability measures mainly comprise: the thickness of the protective layer, the free section is filled with anticorrosive grease, and the rib body is sprayed with coatings such as epoxy and the like. And part of anticorrosion measures are difficult to construct, the construction quality is difficult to guarantee, or the anticorrosion measures are easy to damage in the construction process, and the actual operation is difficult. The design and the service life of the main reinforcement body of the anchor rod need to be required according to a 50Y + mode, and the surface corrosion prevention of the main reinforcement and the connecting structure (generally adopting a connecting nut with the length meeting the requirement) is more worthy.

Heat shrink tubing, also known as heat shrink protective tubing, currently provides insulation protection for wires, cables, and wire terminals. The coating has the advantages of high-temperature shrinkage, softness, flame retardance, insulation, corrosion prevention and the like, and is widely applied to insulation protection of various wire harnesses, welding spots and inductors and rust prevention and corrosion prevention of metal pipes and bars; the heat shrinkable tube has the performances of flame retardance, insulation and temperature resistance, and is a special polyolefin heat shrinkable tube and also made of EVA (ethylene vinyl acetate). It is soft and elastic. Heated (125 ℃) can contract, and the material is widely applied to insulation protection of various wire harnesses, welding spots and inductors, and rust prevention and corrosion prevention of metal pipes and bars. At present, an electric wire connector is usually used, a proper heat-shrinkable tube is selected and sleeved on the electric wire connector, a heat gun is used for heating, and the heat-shrinkable tube shrinks to firmly sleeve the connector. Generally, the insulation function is achieved by packaging of electronics, electric appliances, batteries and the like. The hot air blower can be contracted by using the hot air blower, and has the functions of insulation, protection and the like. The material of the heat shrinkable tube is mainly plastic, including PVC, ABS, EVA, PET, etc.

The heat-shrinkable sleeve is a heat-shrinkable packaging material which shrinks when heated, and commonly used PVC heat-shrinkable sleeves, pet heat-shrinkable sleeves, irradiation cross-linked pe heat-shrinkable sleeves, 10KV high-voltage busbar protection heat-shrinkable sleeves, 35KV high-voltage busbar protection heat-shrinkable sleeves, glue-containing double-wall heat-shrinkable sleeves and wood-grain-like heat-shrinkable sleeves. A heat-shrinkable double-wall casing (hereinafter referred to as a double-wall pipe) is a high-end product (hot melt adhesive + PE) in a PE heat-shrinkable casing; at present, no prestressed or non-prestressed heat-shrinkable sleeve anchor rod is available.

CN201310321525.0 provides a prestressed drilling, anchoring and grouting anchor cable and a supporting method, wherein the prestressed drilling, anchoring and grouting anchor cable comprises a hollow grouting anchor cable with a sleeve head, a sleeve, a lock, a gasket and a tray; the front end of the sleeve is provided with a drill bit, and the sleeve is provided with an anchoring hole and a thread. The hollow grouting anchor cable drives the sleeve to drill, the hollow grouting anchor cable is pushed inwards through threads during reverse rotation, the metal nail at the front end of the sleeve head punctures the anchoring agent package inside the sleeve, the anchoring agent is discharged through the anchoring hole in the sleeve after being mixed, and the gap between the sleeve and the wall of the drilled hole is filled with the anchoring agent, so that the anchoring effect is achieved. The one-time drilling, anchoring and grouting support for the loose coal rocks is realized, and the problem that anchor cables are difficult to enter due to drill hole jamming and collapse of the loose coal rocks is solved.

CN201710363883 is a method for overcoming the deformation of an anti-floating fixed diameter anchor head or an enlarged head anchor rod system, when a drill hole is drilled to a designed depth, high-pressure jet grouting construction or mechanical reaming construction can be carried out, a pull rod of the anchor rod and the fixed diameter anchor head or the enlarged head are put down, an enlarging mechanism enlarges the enlarged head to a designed size after the enlarged head is in place, and then high-pressure grouting or pouring concrete forms a pile in the enlarged section and the whole free section; the tie rod in the anchor rod adopts a thread main reinforcing steel bar which can apply prestress; binding the spiral stirrups and the main reinforcing steel bars of the foundation slab on the substrate, and avoiding collision with the prestressed main reinforcing steel bars in the binding process; and finally, the formwork is erected to pour the foundation concrete foundation slab.

CN2020106672629 a prestressed non-adhesive anchor rod main reinforcement, anchor rod and construction method; a construction method of an enlarged head prestressed concrete anchor rod of CN 2020105188239; CN 2020104738975A prefabricated prestressed anchor rod with guiding device and construction method and CN 2020103929335A post-tensioned prestressing applying device of anchor rod are both applied to prestressed and non-prestressed heat shrinkable sleeve anchor rods; the main reinforcing steel bars can be a single finish rolling anchor rod main reinforcing steel bar or a plurality of anchor rod main reinforcing steel bars, and a bearing plate is provided with a porous and prestress applying device for the main reinforcing steel bars when the anchor rod main reinforcing steel bars are arranged;

the anti-floating tensile combined anchor rod components (including bonding anchor rods and non-bonding anchor rods) are provided with corresponding construction methods. The concrete and the main reinforcing steel bars in the anchor rod are not bonded, the main reinforcing steel bars in the anchor rod can stretch out and draw back or slide in the pipe column or the thermoplastic film sleeve, a post-tensioning method, namely, prestress is applied on a construction site, and the nuts are fastened while the main reinforcing steel bars are prestressed.

The anchor rod is main for the atress piece main muscle principal steel bar (including the principal muscle principal steel bar or with the principal muscle principal steel bar through coupling nut's principal muscle principal steel bar connection structure) as the structure of basic load, the principal muscle principal steel bar can adopt ordinary principal steel bar, include finish rolling principal steel bar or add anticorrosive processing in surface again, unbonded anchor rod principal steel bar can also have following structure: the surface of the main reinforcement main steel bar is provided with an anti-corrosive grease layer, and a thermoplastic film sleeve is arranged outside the anti-corrosive grease layer; coating the anticorrosive grease layer by a anticorrosive grease layer coating device, coating a polyethylene or polypropylene plastic film on the anticorrosive grease layer without bonding ribs by a plastic extruder, and forming a plastic sleeve (pipe) by a cooling cylinder mold; the plastic sleeve is wrapped by concrete or cement mortar, cement paste or other curable materials and is solidified; applying prestress on main reinforcement main steel bars after prestress (applying prestress after fixing is finished) to form a prestress anchor rod assembly; and locking the main reinforcing steel bar of the main reinforcement by using a nut, and tensioning the main reinforcing steel bar to apply prestress to form the prestressed anchor rod assembly. When the thermoplastic film sleeve main reinforcing steel bar, especially the post-tensioned prestressing anti-floating tensile main reinforcing steel bar anchor rod is applied, the prestressed main reinforcing steel bar actually forms a main reinforcing steel bar with a free section, and has the effect of stress application.

Surface treatment of the main reinforcing bars is necessary for corrosion prevention. The top of the anchor rod main steel bar is fixed by a flange nut (kit) embedded and sleeved on the main steel bar (pull rod), or can be fixed by an anchor plate and a nut and connected with a main steel bar framework system of a foundation slab, and the top of the anchor rod main steel bar is fixed by the flange nut (kit) when a post-tensioning method applies stress (post-stressing); grouting or pouring concrete into the gap between the main steel bar and the hole to complete the prestressed anchor rod piece; and finally, installing a formwork and pouring a concrete foundation slab fixing anchor plate. And when the pre-fabricated prestressed anchor rod component is adopted, post-stressing is not needed. The pre-tensioning method does not require stress application and has been prepared as a pre-stressed unit.

The end part of the main reinforcement is provided with a main reinforcement cage or a main reinforcement cage with enlarged diameter (variable diameter), and a connecting nut device is also needed; then one of the materials is wrapped by concrete or cement mortar, cement paste or other curable materials and is solidified; and pouring concrete or cement mortar, cement paste or other curable materials to wrap the concrete or cement mortar, and solidifying the concrete or cement mortar and the cement paste to form the application of the prestressed anchor pile with the enlarged head. When the components connected with the anchor rod are connected with the variable-diameter main reinforcement cage, the fixed-diameter main reinforcement cage, the bag or the reducing cage, the end plate bearing part or other anchor heads, the length of the main reinforcement corresponding to the variable-diameter main reinforcement cage, the fixed-diameter main reinforcement cage, the bag or other anchor heads is reserved at the lower end of the anchor rod component, the bottom of the anchor head is connected with an anchor backing plate (the main reinforcement is welded or is connected through a connecting nut), the proper length of the main reinforcement can be reserved, and the main reinforcement is connected with the top of the finished anchor head through the connecting nut; by improving the rod piece and the anchor head, the anchor rod assembly and the variable-diameter main reinforcement cage, the fixed-diameter main reinforcement cage, the bag or other anchor heads form an organic whole.

The main reinforced anchor rod is one non-adhesive pre-or post-tensioned prestressed floating-resisting tensile steel bar with anticorrosive grease layer of anticorrosive grease, anticorrosive asphalt, polymer material or other anticorrosive material.

The number of the main reinforcing steel bars in the anchor rod assembly, which are subjected to post-tensioning pre-stressing, is one or more than one, but is generally not more than 10 (otherwise, the main reinforcing steel bars form concrete piles), and the specification, the performance, the strength and the diameter of the main reinforcing steel bars can be specifically determined according to the design requirements; the length, the shape and the area of the cross section of the prestressed anchor rod assembly are set according to specific engineering technical requirements; when the length of the rod piece required by engineering is overlong, two or more main steel bar rod pieces can be connected by adopting a nut connector or other modes so as to achieve the required length; the main steel bar nut connector can also be embedded in the anchor rod in advance, the main steel bar can be round steel, steel pipes, steel strands and other section steel, and the two ends of the section steel can also be provided with threads.

The anchor rod assembly and the main reinforcement cage with the variable diameter cover a large range in a solid geometry, and the solid geometry is not shown here.

The application fields include but are not limited to the functional application of anti-floating and tensile strength, and the specific application includes building, roads, mining, tunnel bridges, foundation pits, mountain slope protection and geological disaster treatment; also used in the fields of pressure-resistant engineering and the like. The prefabricated prestressed anchor rod body can be used as a prefabricated prestressed compression-resistant pile according to the requirements of engineering design purposes.

The connecting nut of the prestressed anchor rod and the non-prestressed anchor rod is required. The main steel bar of the prestressed main steel bar actually forms a main steel bar of a free section when the thermoplastic film sleeve main steel bar (shown in the figure in the embodiment) is applied, especially when the post-tensioned prestressed anti-floating tensile main steel bar anchor rod is applied, and the thermoplastic film sleeve can be a sleeve made of various materials such as metal, PP, PE, PV, plastic and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a prestressed and non-prestressed heat-shrinkable sleeve anchor rod. The defect of simple coating protection of the anchor rod piece can be guaranteed, and particularly the damage of a protective layer caused by the fact that the rod body is easy to damage through a coating layer at the position of the connecting nut is avoided.

The technical scheme of the utility model is that the prestressed and non-prestressed heat-shrinkable sleeve anti-corrosion anchor rod comprises 1-5 main steel bars of the anchor rod, wherein when the main steel bars are connected by adopting the connecting nuts, the connecting nuts are used for connecting the main steel bars of the anchor rod to a rated length, and the main steel bars of the anchor rod are finish-rolled deformed steel bars; the nut connector or/and the main reinforcing steel bar of the anchor rod are/is sleeved with a thermoplastic film sleeve, and the main reinforcing steel bar and the connecting nut of the thermoplastic film sleeve are poured with concrete curing materials. And sleeving a thermoplastic film sleeve on the main steel bar of the nut connector or the anchor rod, performing hot air shrinkage, and pouring concrete curing materials on the main steel bar of the thermoplastic film sleeve and the connecting nut.

The main reinforcing steel bars are 1-5, and are respectively sheathed by thermoplastic films, and the heat-shrinkable sleeve is naturally subjected to heat-shrinkable treatment by hot air with corresponding temperature.

Can also be used for the main reinforcement without bonding: the heat-shrinkable sleeve is directly sleeved on the surface of the main steel bar, and the surface of the heat-shrinkable sleeve is coated with grease and then is added with the plastic sleeve. Or the surface of the finish-rolled thread main reinforcing steel bar is provided with an anti-corrosion grease layer, a heat-shrinkable sleeve is arranged outside the anti-corrosion grease layer, and the heat-shrinkable sleeve is heated and shrunk to grip and wrap the anchor bar, so that the anti-corrosion effect of the anchor bar is achieved.

The main reinforcing bar of anchor rod is the main reinforcing bar of many formula anchor rods, generally does not exceed 5. 2-5 are most often used.

The utility model is applicable to the fields including but not limited to the functional application of anti-floating and tensile strength, and the specific application includes building, road, mining, tunnel and bridge, foundation pit and mountain slope protection, and geological disaster treatment; also used in the fields of pressure-resistant engineering and the like. The prefabricated prestressed anchor rod body can be used as a prefabricated prestressed compression-resistant pile according to the requirements of engineering design purposes.

Has the advantages that: the prestressed and non-prestressed heat-shrinkable sleeve anchor rod can ensure the defects of simple coating protection of the anchor rod piece and damage of a protective layer caused by easy damage at the connecting nut. The (prefabricated) prestress connecting anchor rod has a large application range and value in basement anti-floating, foundation pit supporting and the like. The utility model uses the pre-tensioning or post-tensioning prestressed anchor rod to make the bearing capacity reach the applied prestress value required by design, the deformation of the free section of the prestressed anchor rod can be continuously adjusted, and the construction of the scheme is simpler and basically has no influence on the construction of the foundation. Has positive effect on improving the engineering quality and the safety of the technology. The utility model particularly relates to a combination of an anchor rod, a lower end, a reducing main steel bar cage and a grouting body or a concrete anchor head, so that a strong foundation support is obtained in mechanics, and the tensile resistance is reliably transmitted. The utility model can ensure the defects of simple coating protection of the anchor rod piece, in particular to the damage of a protective layer caused by the easy damage of a coating layer at the position of the rod body passing through the connecting nut. The utility model can also be used for unbonded main reinforcement.

Drawings

Fig. 1 and 2 are large diagrams of two kinds of equal-diameter anchor rods with heat-shrinkable sleeves sleeved on main ribs, and the form of the bottom bearing part is not limited to the above form;

fig. 3 and 4 are large graphs of the equal-diameter anchor rods with heat-shrinkable sleeves sleeved on two main ribs, and fibers are added in the grouting materials. The bottom pressure-bearing part is not limited to the above form;

fig. 5 and 6 are two kinds of expanded head anchor rods with heat-shrinkable sleeves sleeved on main ribs, and the bottom bearing part is not limited to the above form;

fig. 7 and 8 are two kinds of expanded head anchor rods with heat-shrinkable sleeves sleeved on main ribs, and fibers are added into grouting materials. The bottom pressure-bearing part is not limited to the above form;

FIG. 9 is a schematic view of a helical rib enlarged footing anchor rod with a heat shrinkable sleeve sleeved on a main rib;

FIG. 10 is a schematic view of a fixed rib enlarged footing anchor rod with a heat shrinkable sleeve sleeved on a main rib;

FIG. 11 is a schematic view of a spiral rib enlarged footing anchor rod with a heat shrinkable sleeve sleeved on a main rib, wherein fibers are added in a grouting material;

FIG. 12 is a schematic view of a fixed rib enlarged footing anchor rod with a heat shrinkable sleeve sleeved on a main rib, wherein fibers are added in a grouting material;

FIG. 13 is a schematic view of a simple enlarged anchor head with a heat shrinkable sleeve sleeved on a main rib;

FIG. 14 is a schematic view of an enlarged anchor head of a ground anchor with a pull rod having a heat shrinkable sleeve sleeved on a main rib;

FIG. 15 is a schematic view of a simple enlarged anchor head with a heat shrinkable sleeve sleeved on a main rib, wherein fibers are added in a grouting material;

FIG. 16 is a schematic view of an enlarged anchor head of a ground anchor with a pull rod having a heat shrinkable sleeve sleeved on a main rib, wherein fibers are added into a grouting material;

FIG. 17 is a schematic view of a variable diameter anchor rod with a heat shrinkable sleeve sleeved over a main reinforcement, without limitation to the main reinforcement cage;

fig. 18 is a large-scale view of a variable-diameter main reinforcement cage enlarged footing anchor rod with a heat-shrinkable sleeve sleeved on a main reinforcement, and fibers are added into a grouting material. The main reinforcement cage is not limited to the above form;

fig. 19 and 20 are two kinds of massive views of the bag type enlarged head anchor rod with the heat-shrinkable sleeve sleeved on the main ribs;

fig. 21 and 22 are two general views of a bag type enlarged head anchor rod with a heat-shrinkable sleeve sleeved on a main rib, and fibers are added into a grouting material;

fig. 23 and 24 are large views of bag type variable-diameter main reinforcement cage enlarged head anchor rods with heat-shrinkable sleeves sleeved on two main reinforcements. The main reinforcement cage is not limited to the above form;

fig. 25 and 26 are large diagrams of two kinds of bag-type variable-diameter main reinforcement cage enlarged head anchor rods with heat-shrinkable sleeves sleeved on main reinforcements, and fibers are added into grouting materials. The main reinforcement cage is not limited to the above form;

fig. 27 is a large view of a variable diameter fiber cage enlarged head anchor rod with a mesh cage, wherein a heat-shrinkable sleeve is sleeved on a main rib. The fiber cage is not limited to the above form;

fig. 28 is a view showing a variable diameter fiber cage enlarged head anchor rod with a mesh cage, wherein a heat-shrinkable sleeve is sleeved on a main rib, and fibers are added into a grouting material. The fiber cage is not limited to the above form;

fig. 29 is a large view of a variable diameter fiber cage enlarged head anchor rod with a mesh sheet, wherein a heat-shrinkable sleeve is sleeved on a main rib. The fiber cage is not limited to the above form;

fig. 30 is a schematic view of a variable diameter fiber cage enlarged head anchor rod with a mesh sheet, wherein a heat-shrinkable sleeve is sleeved on a main rib, and fibers are added into a grouting material. The fiber cage is not limited to the above form;

fig. 31 and 32 are large views of two kinds of bag-type variable-diameter fiber cage enlarged head anchor rods with heat-shrinkable sleeves sleeved on main ribs. The fiber cage is not limited to the above form. The grouting material may be added with fibers;

fig. 33 is a large view of an expanded bearing plate anchor rod with a heat shrinkable sleeve sleeved on a main rib, and the expanded bearing plate is not limited to the above form;

fig. 34 is a schematic view of an expanded pressure-bearing plate expansion head anchor rod with a heat-shrinkable sleeve sleeved on a main rib, and fibers are added into a grouting material. The expandable bearing plate is not limited to the above form;

fig. 35 is a large-scale view of an expanded bearing plate anchor rod with a mesh cage, wherein a heat-shrinkable sleeve is sleeved on a main rib, and the expanded bearing plate is not limited to the above form;

fig. 36 is a schematic view of an expanded pressure-bearing plate expansion head anchor rod with a mesh cage, wherein a heat-shrinkable sleeve is sleeved on a main rib, and fibers are added into a grouting material. The expandable bearing plate is not limited to the above form;

fig. 37 and 38 are large views of two kinds of bag-type expansion bearing plate expansion head anchor rods with heat-shrinkable sleeves sleeved on main ribs, and the expansion bearing plates are not limited to the above forms. The grouting material may be added with fibers;

fig. 39 is a schematic view of a root-shaped ground anchor enlarged head anchor rod with a heat-shrinkable sleeve sleeved on a main rib, and the root-shaped ground anchor head is not limited to the above form. The grouting material may be added with fibers;

fig. 40 is a schematic view of a root-shaped ground anchor enlarged head anchor rod with a mesh sheet, wherein a heat-shrinkable sleeve is sleeved on a main rib, and the root-shaped ground anchor head is not limited to the above form. The grouting material may be added with fibers;

fig. 41 is a schematic view of a bag-type root-shaped ground anchor enlarged head anchor rod with a heat-shrinkable sleeve sleeved on a main rib, and the root-shaped ground anchor head is not limited to the above form. The grouting material may be added with fibers;

fig. 42 is a schematic view of a double-layered root-shaped ground anchor enlarged head anchor rod with a heat-shrinkable sleeve sleeved on a main rib, wherein the number and the style of the root-shaped ground anchor head layers are not limited to the above form. The grouting material may be added with fibers;

fig. 43 is a schematic view of a double-layered root-shaped anchor enlarged head anchor rod with a mesh sheet, wherein a heat-shrinkable sleeve is sleeved on a main rib, and the number and the style of the root-shaped anchor head layers are not limited to the above form. The grouting material may be added with fibers;

fig. 44 is a view showing a bag type double-layered root-shaped anchor enlarged head anchor rod in which a heat-shrinkable sleeve is sleeved on a main rib, and the number and the type of the root-shaped anchor head are not limited to the above forms. The grouting material may be added with fibers;

fig. 45 is a schematic structural view of the main reinforcing bar anchor rod connecting device of the present invention.

FIG. 46 is a schematic view of the connection structure of the free section main reinforcing bar (upper half) and the anchor rod with the bonding section (anchoring section, lower half) main reinforcing bar according to the present invention; the main reinforcing steel bars of the main reinforcing steel bar anchor rod with the bonding section (anchoring section and lower half section) extend to the upper half section, so that the upper half section can be subjected to post-stressing cast-in-place.

FIG. 47 is a schematic view of the (prefabricated) connection structure of the unbonded main reinforcing steel bar anchor rod (free section, upper half section) and the unbonded section (anchored section, lower half section) of the main reinforcing steel bar anchor rod of the present invention; and is also the basic structure of the present invention, the applications of fig. 1-46 are based on various basic applications of the structure of fig. 47.

Detailed Description

As shown, and particularly the labels of FIGS. 45-47, the unnumbered figures are all various applications of the present invention; the anchor rod is characterized in that the anchor rod comprises an anchor rod main steel bar 1, a nut connector 2, a heat-shrinkable sleeve 3, an anchor rod member poured by concrete or mortar 4 and a main steel bar prepared by pouring concrete or mortar 4 or an outer layer of finish-rolled coarse main steel bar; the end of the anchor rod or the anchor rod piece can be provided with a fixing plate or a bearing plate.

The outer layer of the main reinforcement of the anchor rod without the main reinforcement is provided with an anti-corrosive grease layer and a thermoplastic film sleeve.

The heat-shrinkable sleeve 3 is particularly sleeved on a nut connector, and two (more) prestressed or non-prestressed anchor rods are connected together through a connecting device; the connecting device is characterized in that the connecting nut is used for connecting main steel bars of two anchor rods, the length of the connecting nut and the length of the covering nut are added with allowance, or the two prestressed anchor rods are welded and connected through flanges or main steel bars, the main steel bars of the two prestressed anchor rods are respectively fixed on the flanges and connected with the two flanges through bolts, the two flanges with the radius larger than that of the anchor rods are adopted, the peripheral bolts of the two flanges are connected, or the two flanges are locked by hoop bolts (an anchor locking structure), and the direct main steel bar welding can be used without the flanges. The thermoplastic film sleeve can be made of various materials such as PP, PE, PVC, other plastics and the like, and can be made of double-layer materials, and the application of the thermoplastic film sleeve can adopt various prior arts. PP, PE and PVC have low cost and good weather resistance.

The prefabricated combined assembled anti-floating tensile anchor rod is divided into two main reinforcement structures of an adhesive main reinforcement and an unbonded main reinforcement, and a cast concrete outer sleeve or an independent outer sleeve column component is adopted.

The pre-fabricated prestressed anchor is a pre-tensioned pre-fabricated prestressed anchor for pre-stressing and anchoring the main steel bar by the coagulation force of concrete, or a prestressed anchor for locking and anchoring the independent outer casing string component and the main steel bar.

The pre-fabricated prestressed anchor can pre-stress anchor the main steel bar by the coagulation force of concrete, etc., or can be anchored by an independent outer casing string component and the main steel bar, or can be a post-tensioned prestressed anchor. The post-tensioned prestressed anchor rod is characterized in that prestress is applied to the anchor rod on a construction site after the release of the anchor rod is finished, and the prestress is immediately anchored.

The tubular column is the tubular column shape overcoat of stock owner reinforcing bar, pass the tubular column with the stock owner reinforcing bar, arrange the both ends of finished product tubular column in with the foraminiferous loading board that is greater than the tubular column internal diameter of central authorities, fix the owner reinforcing bar end at the loading board or with the main reinforcement end welding or the nut is fixed on the loading board with the nut when the stock that the loading board surface exposes is exerted stress, the main reinforcing bar is single finish rolling stock owner reinforcing bar, or several finish rolling stock owner reinforcing bars, the loading board will have porous and many owner reinforcing bar's prestressing force applying device during several finish rolling stock owner reinforcing bars.

The lower end connecting structure of the anti-floating tensile anchor rod of the concrete prefabricated pipe column is grouting body or concrete of an expansion head. When adopting the main reinforcing cage of variable diameter, pour the concrete foundation who forms a diameter and be greater than the precast tubular column of concrete, wrap up the main reinforcing cage of variable diameter, the upper end of the main muscle of anchor rod main reinforcement lower extreme nut connection or welded fastening main reinforcing cage of variable diameter.

Adopt the main reinforcing bar of unbonded anchor rod, unbonded anchor rod main reinforcing bar surface is equipped with the anticorrosive grease layer, and anticorrosive grease layer is equipped with the thermoplastic film cover outward.

The anchor rod main reinforcing steel bars of the combined anchor rod are connected into a required length by adopting a nut connector or a welding mode. The main reinforcement nut connector can be embedded in the anchor rod in advance.

The anchor rod main reinforcing steel bars in the anchor rod assembly are connected in parallel by one to 5 pieces.

The combined anchor rod is a pre-tensioned prestressed anti-floating tensile main steel bar anchor rod, the tubular column is a tubular column-shaped outer sleeve of an anchor rod main steel bar, the anchor rod main steel bar penetrates through the tubular column, the bearing plate with a hole in the center and larger than the inner diameter of the tubular column is arranged at the two ends of a finished tubular column, when the anchor rod exposed out of the surface of the bearing plate is stressed, the main steel bar end is fixed on the bearing plate or welded and fixed on the bearing plate by a nut, the main steel bar is a single finish rolling anchor rod main steel bar or a plurality of finish rolling anchor rod main steel bars, and a device for applying the prestress of the porous main steel bars and a plurality of main steel bars to the bearing plate is required during the finish rolling of the anchor rod main steel bars. The finished pipe column is prepared by pouring concrete or cement mortar, cement paste or other curable materials, and a main steel reinforcement framework can be arranged inside the pipe column.

The prestress meter and the optical fiber loop can be pre-embedded in the pipe column, the prestress application holding state of the pre-fabricated prestressed anchor can be monitored at any time, and the condition deviating from the standard can be monitored, so that effective measures and methods can be adopted to adjust and correct in time; meanwhile, necessary conditions are prepared for the intellectualization of the finished anchor rod and the quality monitoring of the full service cycle; through scientific technologies and methods such as 5G, the Internet, a block chain, big data, two-dimensional codes and three-dimensional codes, the whole-course and main node dynamic and traceable identification and detection can be carried out on the states, engineering safety performance, quality conditions and the like of the underground structure, and the safety and stability of a pile foundation are guaranteed.

The main reinforcement of the variable-diameter main reinforcement cage does not need prestress, so that a concrete foundation with the diameter larger than that of a concrete prefabricated pipe column is formed, and the foundation is grouted through a grouting pipe; has greater tensile and compressive capabilities. ) Therefore, the pipe column is an important element of the pipe column assembly type anti-floating tensile anchor assembly prefabricated by concrete. The lower end of the anchor rod main steel bar fixes the upper end of the main steel bar; especially the mode such as spiro union or welding is fixed.

The extension continuous type anchor rod is a rod piece which can be continuously formed into an extension continuous type anchor rod and finally becomes an assembly. The anchor rod components are assembled to form an engineering part with compression resistance and tensile resistance (mainly tensile resistance and better effect) in practical application.

The anchor rod is main for the atress piece main muscle principal steel bar (including the principal muscle principal steel bar or with the principal muscle principal steel bar through coupling nut's principal muscle principal steel bar connection structure) as the structure of basic load, the principal muscle principal steel bar can adopt ordinary principal steel bar, include finish rolling principal steel bar or add anticorrosive processing in surface again, unbonded anchor rod principal steel bar can also have following structure: the surface of the main reinforcement main steel bar is provided with an anti-corrosive grease layer, and a thermoplastic film sleeve is arranged outside the anti-corrosive grease layer; coating oil by an oiling device, coating the oil without binding ribs with a polyethylene or polypropylene plastic film by a plastic extruder, and molding a plastic sleeve (pipe) by a cooling cylinder mold; the plastic sleeve is wrapped by concrete or cement mortar, cement paste or other curable materials and is solidified; applying prestress on main reinforcement main steel bars after prestress (applying prestress after fixing is finished) to form a prestress anchor rod assembly; and locking the main reinforcing steel bar of the main reinforcement by using a nut, and tensioning the main reinforcing steel bar to apply prestress to form the prestressed anchor rod assembly.

When the thermoplastic film sleeve main reinforcing steel bar, in particular to a post-tensioned pre-stressed anti-floating tensile main reinforcing steel bar anchor rod, is applied, the pre-stressed main reinforcing steel bar actually forms a main reinforcing steel bar with a free section, but does not extend any more, and has the effect of applying stress.

The end part of each anchor rod unit is provided with a fixed nut connector or other main steel bar connecting structures to be connected with the anchor rod unit with the other length, and when the nut connector is adopted, the fixed nut connector is matched with the main steel bar at the end part of the adjacent unit; for example: each pre-stressed bolt member unit (especially various pre-stressed bolt member units) is prepared or prepared into 3, 4, 5 and 7 meter-sized units (net length), and the different sized units are mutually connected into the bolt members with different length requirements by using the embedded connecting nuts 13, for example, two bolt members with different sizes can be conveniently connected into the bolt members with different lengths from 7 to 14 meters. Three anchor rods with different fixed lengths can be conveniently connected into anchor rod pieces with different lengths of 15-21 meters. Three or more anchor connections are not shown in the drawings but are not beyond the scope of the utility model. Preferably, a pre-fabricated prestressed anchorage member unit is adopted.

The above description is only exemplary of the present invention and should not be taken as limiting the utility model, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A prestressed and non-prestressed heat-shrinkable sleeve anticorrosion anchor rod is characterized in that 1-5 main steel bars of the anchor rod are provided, when the main steel bars are connected by adopting connecting nuts, the connecting nuts are used for connecting the main steel bars of the anchor rod to a rated length, and the main steel bars of the anchor rod are finish-rolled deformed steel bars; the connecting structure at the lower end of the anchor rod is grouting body or concrete of the expansion head, the nut connector or/and the main steel bar of the anchor rod are/is sleeved with the thermoplastic film sleeve, and the main steel bar and the connecting nut of the thermoplastic film sleeve are poured with concrete curing materials.

2. The anti-corrosion anchor rod with prestressed and non-prestressed heat-shrinkable sleeves as claimed in claim 1, wherein the heat-shrinkable sleeve is also used at the joint of the lower end of the anchor rod and the enlarged head.

3. The prestressed and non-prestressed heat-shrinkable sleeve anti-corrosion anchor rod as claimed in claim 1, wherein the main reinforcing steel bar of the anchor rod is a finish-rolled deformed steel bar, and an anti-corrosion grease layer is arranged on the surface of the finish-rolled deformed steel bar, and the heat-shrinkable sleeve is arranged outside the anti-corrosion grease layer.

4. The anti-corrosion anchor rod of claim 1, wherein the heat-shrinkable film sleeve is directly fitted over the surface of the main reinforcing bar, and the surface of the heat-shrinkable film sleeve is coated with grease and then covered with plastic.

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