High-strength steel wire anchor and installation process

Abstract

The application discloses a high-strength steel wire anchorage device and mounting process, which comprises a first anchor plate, a second anchor plate and high-strength steel wires. The first anchor plate and the second anchor plate are anchored on a bridge. Both ends of the high-strength steel wires are fixed by wire fixing devices. One wire fixing device is fixedly installed on the first anchor plate and forms a fixed anchor head. The other wire fixing device is slidably installed on the second anchor plate and forms a tensioning anchor head. The high-strength steel wires are tensioned to the designed tonnage force through a tensioning system, and then the tensioning bolts are locked. The tensioning force range is wide, and the tensioning force can reach 5 tons to 40 tons. Each bundle of high-strength steel wires can be tensioned at one time, the stress is uniform, the prestress loss is small, the anchorage device is thin, the additional load generated by reinforcement is small, and the cost is low.

Description

Technical Field

[0001] This invention relates to bridge reinforcement, and in particular to a high-strength steel wire anchor and its installation process. Background Technology

[0002] With the rapid development of transportation in my country, the mileage of expressways and national and provincial highways has increased rapidly, and the number of bridges has reached 960,000. 210,000 bridges were built before the 1990s, accounting for 22% of the total number of bridges. Early bridges, due to their low load-bearing capacity and long service life, have suffered damage and require reinforcement and repair. External prestressing is one of the main methods for bridge reinforcement and repair. Commonly used materials include prestressed steel strands, prestressed high-strength steel wires, and prestressed carbon fiber plates. High-strength steel wires, used as prestressed reinforcing bars and in structures such as cable-stayed bridge cables, are widely used in bridge construction due to their mature technology, simple construction, and low cost.

[0003] Currently, high-strength steel wire is mainly used as prestressing tendon in new construction projects, such as pier anchors. Its application in bridge reinforcement and maintenance is limited, primarily due to the lack of large-tonnage external prestressed high-strength steel wire anchorages. Based on years of experience in bridge inspection, reinforcement, and maintenance, and through summarization, experimentation, and research, the inventors of this patent have developed an ultra-thin external prestressed high-strength steel wire anchorage.

[0004] The existing external prestressed high-strength steel wire anchor consists of an anchor plate, anchor bolts, connectors, and tie rods. Its working principle is that the anchor plate is anchored to the bottom surface of the box girder by anchor bolts implanted in the concrete at the bottom of the beam. The high-strength steel wire is connected to the tie rods through the connectors. The tie rods pass through the longitudinal holes of the anchor plate. The tie rods at the anchoring end are fixed by tightening the tie rod nuts. After the tensioning end tie rods are subjected to the design tension force by the tensioning system, they are anchored to the anchor plate by tightening the nuts.

[0005] The advantages of this anchorage are its thin structure and low additional load for bridge reinforcement; the disadvantages are its complex structure, the need for separate tensioning of each tie rod during construction, the long construction period, the large prestress loss due to the force between the tie rods, and the small tonnage of the anchorage, which provides little prestress to the box girder. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-strength steel wire anchor and its installation process.

[0007] The objective of this invention is achieved through the following technical solution: A high-strength steel wire anchor includes a first anchor plate, a second anchor plate, and a high-strength steel wire. The first and second anchor plates are anchored to a bridge. Both ends of the high-strength steel wire are secured by a wire-fixing device. One wire-fixing device is fixedly installed on the first anchor plate to form a fixed anchor head, and the other wire-fixing device is slidably installed on the second anchor plate to form a tension anchor head. The wire-fixing device includes a wire-fixing plate and a wire-pressing plate. The top and / or bottom of the wire-fixing plate are longitudinally grooved, with one side of the groove serving as a wire threading head and the other side as a connecting head. The wire-pressing plate is detachably installed in the groove by locking screws. The bottom of the groove is transversely provided with several longitudinally spaced first wire-threading grooves. The first wire-threading grooves extend towards the wire-threading head and form a wire thread at the wire-threading head. The pressure plate has a second threading groove corresponding to the first threading groove. The first threading groove and the corresponding second threading groove form a receiving groove. The groove also has a first anti-reverse groove corresponding to the first threading groove. The first anti-reverse groove is connected to the first threading groove. The width of the first anti-reverse groove is greater than the width of the corresponding first threading groove. The pressure plate has a second anti-reverse groove. The second anti-reverse groove is connected to the second threading groove. The width of the second anti-reverse groove is greater than the width of the corresponding second threading groove. The second anti-reverse groove and the first anti-reverse groove form an anti-reverse cavity. The two ends of the high-strength steel wire have abutments. The two ends of the high-strength steel wire pass through the threading hole and the receiving groove of the corresponding fixing device in sequence, and the abutments of the high-strength steel wire are stuck in the corresponding anti-reverse cavity. The second anchor plate is equipped with a tension bolt, which is locked with the corresponding connector.

[0008] Optionally, the first anchor plate has an installation groove, and several limiting grooves are provided on the longitudinal side walls of the installation groove. The outer side wall of the connector for fixing the anchor head is provided with a limiting block corresponding to the limiting groove, and the limiting block is stuck in the corresponding limiting groove.

[0009] Optionally, the transverse side walls of the limiting groove are outwardly opening wedge-shaped surfaces, and the limiting block is provided with inclined surfaces corresponding to the wedge-shaped surfaces.

[0010] Optionally, a limiting block corresponding to the limiting groove is also provided on the outer wall of the pressure plate of the fixed anchor head.

[0011] Optionally, the connector of the fixed anchor head is provided with several waist-shaped holes through which anchor bolts pass, and the waist-shaped holes extend laterally.

[0012] Optionally, the first anchor plate includes a first U-shaped frame and a first base plate, the first base plate being installed at the bottom of the first U-shaped frame, and the first U-shaped frame and the first base plate forming an installation groove.

[0013] Optionally, a sliding groove is provided on the second anchor plate, and the fixing device of the tension anchor head is slidably installed in the sliding groove. The top of the connector of the tension anchor head is also provided with a reaction frame screw hole for installing the reaction frame.

[0014] Optionally, the second anchor plate includes a second U-shaped frame and a second base plate. The second base plate is installed at the bottom of the second U-shaped frame, and the second U-shaped frame and the second base plate form a sliding groove. The transverse side wall of the second U-shaped frame is provided with through holes for tension bolts to pass through.

[0015] Optionally, several first anti-reverse grooves are longitudinally connected and / or several second anti-reverse grooves are longitudinally connected.

[0016] A high-strength steel wire anchor installation process, characterized by the following steps:

[0017] S1: Preliminary preparation, a groove is opened on the bridge for the first anchor plate and the second anchor plate, and the corresponding anchor bolts are embedded in the groove.

[0018] S2: High-strength steel wire fixing: First, pass both ends of the high-strength steel wire through the wire hole. Then, use a wire-pressing machine to press the ends of the high-strength steel wire. After pressing, place the pressed ends of the high-strength steel wire in the first anti-reverse groove. Then, place the pressure plate in the groove and lock the pressure plate and the fixing plate with locking screws.

[0019] S3: Installation of high-strength steel wire anchors: Place the high-strength steel wire anchors on the bridge, ensuring that the first and second anchor plates are located in the corresponding grooves, and that the anchor bolts on the grooves pass through the corresponding anchor holes, and then tighten the anchor bolts.

[0020] S4: High-strength steel wire anchor assembly, install the fixed anchor head in the installation groove of the first anchor plate, and make the limiting block located in the corresponding limiting groove, and place the tensioning anchor head in the sliding groove of the second anchor plate, and then install the tensioning bolt on the second anchor plate, and make the tensioning bolt threadedly connected to the connector on the tensioning anchor head;

[0021] S5: Tensioning high-strength steel wire, install the counter-support frame on the connector of the tensioning anchor head through the reaction frame mounting bolts, then install the tensioner, and the tensioner will work to push the tensioning anchor head to move laterally, thereby tightening the high-strength steel wire. When the high-strength steel wire reaches the design tension value, tighten the locking nut on the tensioning bolt, and then disassemble the tensioner and the reaction frame.

[0022] The present invention has the following advantages: The high-strength steel wire anchor of the present invention fixes the anchor plate to the bottom surface of the box girder by means of anchor bolts implanted in the concrete of the box girder. The two anchor plates are equipped with fixed anchor heads and tensioning anchor heads respectively. After the high-strength steel wire is tensioned to the design tonnage force by installing the tensioning system, the tensioning bolt is locked. The tensioning force range is wide, and the tensioning force can reach 5 tons to 40 tons. Each bundle of high-strength steel wire can be tensioned at one time, with uniform stress and small prestress loss. At the same time, the anchor is thin, the additional load generated by reinforcement is small, and the cost is low. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram showing the connection between the high-strength steel wire and the wire fixing device;

[0026] Figure 4 This is a schematic diagram of the structure for fixing the anchor head;

[0027] Figure 5 This is a schematic diagram of the installation of high-strength steel wire in a wire fixing device.

[0028] Figure 6 for Figure 4 Schematic diagram of the cross section of AA;

[0029] Figure 7 A schematic diagram of the structure of the pressure plate on the anchor head;

[0030] Figure 8 Schematic diagram of the first anchor plate Figure 1 ;

[0031] Figure 9 Schematic diagram of the first anchor plate Figure 2 ;

[0032] Figure 10 This is a schematic diagram of the first U-shaped frame;

[0033] Figure 11 This is a schematic diagram of the tensioning anchor head.

[0034] Figure 12 This is a schematic diagram of the pressure plate for tensioning anchor heads;

[0035] Figure 13 Schematic diagram of the second anchor plate Figure 1 ;

[0036] Figure 14 Schematic diagram of the second anchor plate Figure 2 ;

[0037] Figure 15 Shear force analysis diagram for anchor bolts;

[0038] Figure 16 This is a schematic diagram of the installation of the tensioner and reaction frame;

[0039] In the diagram, 10-anchoring end, 20-high-strength steel wire, 30-tensioning end, 40-tensioner, 50-reaction frame, 100-first anchoring plate, 200-fixed anchor head, 300-second anchoring plate, 400-tensioning anchor head, 101-installation groove, 102-limiting groove, 103-first U-shaped frame, 104-first base plate, 201-fixing plate, 202-limiting block, 203-slotted hole, 204-threading head, 205 - Connector, 206- First wire-passing groove, 207- First anti-reverse groove, 208- Pressure plate, 209- Second wire-passing groove, 210- Second anti-reverse groove, 211- Wire-passing hole, 212- Receiving groove, 213- Anti-reverse cavity, 214- Groove, 215- Tensioning screw hole, 401- Second U-shaped frame, 402- Second base plate, 403- Sliding groove, 404- Tensioning bolt, 405- Through hole, 406- Reaction frame mounting bolt. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] like Figure 1 and Figure 2 As shown, a high-strength steel wire anchor includes a first anchor plate 100, a second anchor plate 300, and a high-strength steel wire 20. The first anchor plate 100 and the second anchor plate 300 are anchored to a bridge. In this embodiment, a groove is provided on the bridge for placing the first anchor plate 100 and the second anchor plate 300, and anchor bolts are embedded in the groove. Several anchor holes are provided on the first anchor plate 100 and the second anchor plate 300. During installation, the anchor bolts are passed through the corresponding anchor holes and then locked with lock nuts. Both ends of the high-strength steel wire 20 are secured by a fixing wire. The device is equipped with a wire fixing device, one of which is fixedly installed on the first anchor plate 100 to form a fixed anchor head 200, and the other wire fixing device is slidably installed on the second anchor plate 300 to form a tension anchor head 400. The tension anchor head 400 and the second anchor plate 300 form a tension end 30, and the fixed anchor head 200 and the first anchor plate 100 form an anchoring end 10. In use, the high-strength steel wire 20 is in a taut state, which allows the high-strength steel wire 20 to generate prestress. This prestress can be transferred to the bridge through the first anchor plate 100 and the second anchor plate 300, thereby achieving the reinforcement and maintenance of the bridge.

[0047] In this embodiment, as Figure 3 and Figure 5As shown, the wire fixing device includes a wire fixing plate 201 and a wire clamping plate 208. The top and / or bottom of the wire fixing plate 201 have longitudinally formed grooves 214. Preferably, both the top and bottom of the fixing plate have longitudinally formed grooves 214. When the wire fixing plate 201 has grooves 214, one side of the groove 214 is a wire threading head 204, and the other side is a connector head 205. The wire clamping plate 208 is detachably installed in the groove 214 by locking screws. In this embodiment, in the longitudinal direction, the groove 214... Both ends and the middle are provided with a row of screw holes, with at least two screw holes in each row. Furthermore, the bottom of the groove 214 has several longitudinally spaced first threading grooves 206 horizontally distributed. In this embodiment, first threading grooves 206 are provided on both sides of the screw holes in the middle, and the first threading grooves 206 on both sides are symmetrical to the screw holes in the middle row. When the high-strength steel wire 20 is installed, the prestress generated by the high-strength steel wire 20 can make the wire fixing device uniformly stressed. In this embodiment, such as... Figure 5 As shown, the first threading groove 206 extends towards the threading head 204 and forms a threading hole 211 on the threading head 204, as... Figure 7 and Figure 12 As shown, the wire pressing plate 208 has a second wire passing groove 209 corresponding to the first wire passing groove 206, such as... Figure 5 and Figure 6As shown, the first threading groove 206 and the corresponding second threading groove 209 form a receiving groove 212. A first anti-retraction groove 207 corresponding to the first threading groove 206 is also provided on the groove 214. The first anti-retraction groove 207 communicates with the first threading groove 206, and the width of the first anti-retraction groove 207 is greater than the width of the corresponding first threading groove 206. A second anti-retraction groove 210 is provided on the wire pressing plate 208, and the second anti-retraction groove 210 communicates with the second threading groove 209. The width of 10 is greater than the width of the corresponding second threading groove 209, and the second anti-reverse groove 210 and the first anti-reverse groove 207 form an anti-reverse cavity 213. The two ends of the high-strength steel wire 20 have abutments. The two ends of the high-strength steel wire 20 pass through the threading hole 211 and the receiving groove 212 of the corresponding fixing device in sequence, and the abutments of the high-strength steel wire 20 are stuck in the corresponding anti-reverse cavity 213. In this embodiment, since the top and bottom of the fixing plate are both longitudinally provided with grooves 214, the high-strength steel wire 20... After installation, there are two rows of high-strength steel wires 20. During installation, the two ends of the high-strength steel wires 20 are first passed through the wire holes 211. Then, a wire-end forming machine is used to form the ends of the high-strength steel wires 20. The formed ends are then placed in the corresponding first anti-reverse grooves 207. Finally, the wire clamping plate 208 and the wire fixing plate 201 are locked together with locking screws. At this point, due to the presence of the anti-reverse cavity 213, when the high-strength steel wires 20 are subjected to axial tensile force... The high-strength steel wire 20 will not come out of the fixing device. If the high-strength steel wire 20 is long, a support plate can be anchored on the bridge between the fixed anchor head 200 and the tension anchor head 400. The support plate has holes through which the high-strength steel wire 20 passes. By supporting the high-strength steel wire 20 through the support plate, the high-strength steel wire 20 between the fixed anchor head 200 and the tension anchor head 400 can be positioned. In addition, during the tensioning of the prestressed tendon, it can prevent the high-strength steel wire 20 from breaking and flying out to injure people.

[0048] In this embodiment, as Figure 2 and Figure 11 As shown, a tension bolt 404 is installed on the second anchor plate 300. The tension bolt 404 is locked to the corresponding connector 205. Furthermore, a tension screw hole 207 is provided on the connector 205, and the tension bolt 404 is threadedly connected to the tension screw hole 207. During the tensioning process of the high-strength steel wire 20 through the tensioner 40, the tension anchor head 400 will move laterally, and the tension bolt 404 will also move laterally. When the prestress of the high-strength steel wire 20 reaches the design prestress, the locking nut on the tension bolt 404 is tightened to prevent the high-strength steel wire 20 from retracting and to ensure the stability of the prestress of the high-strength steel wire 20.

[0049] In this embodiment, as Figure 9 and Figure 10As shown, the first anchor plate 100 has an installation groove 101, and several limiting grooves 102 are provided on the longitudinal side walls of the installation groove 101. The outer side wall of the connector 205 of the fixed anchor head 200 is provided with a limiting block 202 corresponding to the limiting groove 102. The limiting block 202 is stuck in the corresponding limiting groove 102. Through the cooperation of the limiting block 202 and the limiting groove 102, the relative positions of the fixed anchor head 200 and the first anchor plate 100 are fixed during the tensioning process of the high-strength steel wire 20.

[0050] In this embodiment, after the high-strength steel wire 20 reaches the designed prestress, it will exert a reaction force on the fixed anchor head 200, thereby forming a shear force between the limiting block 202 and the limiting groove 102. In order to prevent the limiting block 202 and the limiting groove 102 from failing, the transverse side walls of the limiting groove 102 are outwardly opening wedge-shaped surfaces. The limiting block 202 is provided with inclined surfaces corresponding to the wedge-shaped surfaces. Through the cooperation of the wedge-shaped surfaces and the inclined surfaces, the shear force can be distributed in the transverse and longitudinal directions, thereby preventing the limiting block 202 from being damaged and ensuring the service life of the fixed anchor head 200. Moreover, after the limiting block 202 is provided with inclined surfaces, the limiting block 202 becomes a trapezoidal structure, and the structural strength of the limiting block 202 is also increased, so that the limiting block 202 can more easily resist the shear force.

[0051] In this embodiment, since there are multiple limiting grooves 102, that is, when both sides of the groove 214 have limiting grooves 102, the outer side wall of the pressure plate 208 of the anchor head 200 is also provided with limiting blocks 202 corresponding to the limiting grooves 102. The fixing plate 201 and the pressure plate 208 are provided with limiting blocks 202 at the same time, which can reduce the relative displacement between the fixing plate 201 and the pressure plate 208 and reduce the shearing force of the locking screw.

[0052] In this embodiment, because a short-distance displacement will occur between the fixed anchor head 200 and the first anchor plate 100 during the tensioning process of the high-strength steel wire 20, therefore, as Figure 4 As shown, the connector 205 of the fixed anchor head 200 has several waist-shaped holes 203 through which anchor bolts pass, and the waist-shaped holes 203 extend laterally. During installation, the anchor bolts pass through the bottom of the fixed anchor head 200 and through the waist-shaped holes 203, and are then locked with nuts. In this way, during the tensioning process of the high-strength steel wire 20, the fixed anchor head 200 can be positioned at a short distance relative to the first anchor plate 100. The relative position of the fixed anchor head 200 and the first anchor plate 100 is fixed only after the wedge-shaped surface abuts against the inclined surface. Moreover, during installation, since the fixed anchor head 200 is suspended, the anchor bolts installed in the waist-shaped holes 203 can also prevent the fixed anchor head 200 from detaching from the first anchor plate 100.

[0053] In this embodiment, a sliding groove 403 is provided on the second anchor plate 300, and the wire fixing device of the tension anchor head 400 is slidably installed in the sliding groove 403. The top of the connector 205 of the tension anchor head 400 is also provided with screw holes for mounting the reaction frame 50. In this embodiment, as shown... Figure 8 and Figure 9 As shown, the first anchor plate 100 includes a first U-shaped frame 103 and a first base plate 104. The first base plate 104 is installed at the bottom of the first U-shaped frame 103, and the first U-shaped frame 103 and the first base plate 104 form an installation groove 101, as shown. Figure 13 and Figure 14 The second anchor plate 300 includes a second U-shaped frame 401 and a second base plate 402. The second base plate 402 is installed at the bottom of the second U-shaped frame 401, and the second U-shaped frame 401 and the second base plate 402 form a sliding groove 403. A through hole 405 for the tension bolt 404 is provided on the transverse side wall of the second U-shaped frame 401. After the groove is opened in the beam, the bottom of the groove is an uneven surface, resulting in high friction, which is not conducive to the movement of the tension anchor head 400 and the fixed anchor head 200. In this embodiment, the arrangement of the first base plate 104 and the second base plate 402 allows the tensioning anchor head 400 and the fixed anchor head 200 to contact the flat surface, resulting in less friction relative to the trough. This facilitates the movement of the tensioning anchor head 400 and the fixed anchor head 200. Furthermore, the separate processing of the U-shaped frame and the base plate during manufacturing reduces the processing difficulty and cost of the anchor plate, thereby reducing the overall volume and weight of the high-strength steel wire 20 anchor and consequently reducing the additional load of the high-strength steel wire 20 anchor on the beam.

[0054] Because the high-strength steel wire 20 requires a certain thickness for the anchor head to reach the design tension, and the anchor bolts are subject to shear forces, there are also requirements for the anchor bolts. The specific calculation formula is as follows:

[0055] Anchor head thickness calculation:

[0056]

[0057]

[0058] h = a + 2b

[0059] In the formula: such as Figure 6 As shown, 'a' represents the thickness of the anchor head groove 214 at the opening position;

[0060] b indicates the thickness of the 208 pressure plate, which is at least 6mm.

[0061] F represents the design tensile force of a single high-strength steel wire at 20;

[0062] φ represents the diameter of a 20mm hole in a high-strength steel wire;

[0063] L indicates a 20mm spacing between high-strength steel wires;

[0064] h indicates the thickness of the 204 thread end.

[0065] Formula for calculating the shear force of anchor bolts:

[0066]

[0067]

[0068] like Figure 15 As shown, b is the length between the inflection point and the concrete surface;

[0069] d is the bolt diameter;

[0070] [σ] represents the design stress of the concrete;

[0071] 'a' represents the cantilever length of the anchor bolt;

[0072] L is the drilling depth;

[0073] F represents the design shear force of the anchor bolt.

[0074] A high-strength steel wire 20 anchor installation process includes the following steps:

[0075] S1: Preliminary preparation: The first anchor plate 100 and the second anchor plate 300 are cut into the bridge, and the corresponding anchor bolts are embedded in the groove. During the preliminary preparation, the tension anchor head 400 and the fixed anchor head 200 should also be processed in the factory. The high-strength steel wire 20 is selected according to the needs.

[0076] S2: For the high-strength steel wire 20, first pass both ends of the high-strength steel wire 20 through the wire hole 211, and then use a wire-ending machine to end the ends of the high-strength steel wire 20. After the end-ending is completed, place the end-end of the high-strength steel wire 20 in the first anti-reverse groove 207, and then place the wire-pressing plate 208 in the groove 214, and lock the wire-pressing plate 208 and the wire-fixing plate 201 with locking screws.

[0077] S3: Installation of high-strength steel wire 20 anchorage: Place the high-strength steel wire 20 anchorage on the bridge, and make the first anchor plate 100 and the second anchor plate 300 located in the corresponding groove, and the anchor bolts on the groove pass through the corresponding anchor holes, and then tighten the anchor bolts.

[0078] S4: The high-strength steel wire 20 anchor is assembled by installing the fixed anchor head 200 in the mounting groove 101 of the first anchor plate 100, and making the limiting block 202 located in the corresponding limiting groove 102, and placing the tensioning anchor head 400 in the sliding groove 403 of the second anchor plate 300, and then installing the tensioning bolt 404 on the second anchor plate 300, and making the tensioning bolt 404 threadedly connected to the connector 205 on the tensioning anchor head 400;

[0079] S5: 20mm high-strength steel wire, such as... Figure 16 As shown, the counter-support frame is installed on the connector 205 of the tension anchor head 400 via the reaction frame mounting bolt 406. Then, the tensioner 40 is installed and operates, pushing the tension anchor head 400 to move laterally, thereby tightening the high-strength steel wire 20. When the high-strength steel wire 20 reaches the design tension value, the locking nut on the tension bolt 404 is tightened. Then, the tensioner 40 and the reaction frame 50 are disassembled. In this embodiment, the tensioner 40 and the reaction frame 50 are existing products, so their structure and working principle will not be described further.

[0080] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength steel wire anchor, characterized in that: The structure includes a first anchor plate, a second anchor plate, and a high-strength steel wire. The first and second anchor plates are anchored to the bridge. Both ends of the high-strength steel wire are secured by a wire-fixing device. One wire-fixing device is fixedly installed on the first anchor plate to form a fixed anchor head, while the other wire-fixing device is slidably installed on the second anchor plate to form a tension anchor head. Each wire-fixing device includes a wire-fixing plate and a wire-pressing plate. The top and / or bottom of the wire-fixing plate have longitudinally formed grooves, with one side of the groove serving as a wire threading end and the other side as a connecting end. The wire-pressing plate is detachable via locking screws. The device is installed within the groove. The bottom of the groove has several longitudinally spaced first threading grooves horizontally spaced. These first threading grooves extend towards the threading head and form threading holes at the threading head. The pressure plate has second threading grooves corresponding to the first threading grooves. The first threading grooves and their corresponding second threading grooves form a receiving groove. The groove also has a first anti-retraction groove corresponding to the first threading groove, which communicates with the first threading groove. The width of the first anti-retraction groove is greater than the width of the corresponding first threading groove. The pressure plate has... The second anti-reverse groove is connected to the second threading groove. The width of the second anti-reverse groove is greater than the width of the corresponding second threading groove, and the second anti-reverse groove and the first anti-reverse groove form an anti-reverse cavity. The two ends of the high-strength steel wire have abutments. The two ends of the high-strength steel wire pass through the threading hole and the receiving groove of the corresponding fixing device in sequence, and the abutments of the high-strength steel wire are stuck in the corresponding anti-reverse cavity. A tension bolt is installed on the second anchor plate, and the tension bolt is locked to the corresponding connector. The first anchor plate includes a first U-shaped frame and a first base plate. The first base plate is installed with... At the bottom of the first U-shaped frame, and the first U-shaped frame and the first base plate form an installation groove, a sliding groove is provided on the second anchor plate, and the fixing device of the tension anchor head is slidably installed in the sliding groove. The top of the connector of the tension anchor head is also provided with a reaction frame screw hole for installing the reaction frame. The second anchor plate includes a second U-shaped frame and a second base plate. The second base plate is installed at the bottom of the second U-shaped frame, and the second U-shaped frame and the second base plate form the sliding groove. A through hole for the tension bolt to pass through is provided on the transverse side wall of the second U-shaped frame.

2. The high-strength steel wire anchor according to claim 1, characterized in that: The first anchor plate has an installation groove, and several limiting grooves are provided on the longitudinal side walls of the installation groove. The outer side wall of the connector of the fixed anchor head is provided with a limiting block corresponding to the limiting groove, and the limiting block is stuck in the corresponding limiting groove.

3. A high-strength steel wire anchor according to claim 2, characterized in that: The transverse side walls of the limiting groove are outwardly opening wedge-shaped surfaces, and the limiting block is provided with an inclined surface corresponding to the wedge-shaped surface.

4. A high-strength steel wire anchor according to claim 3, characterized in that: The outer wall of the pressure plate of the fixed anchor head is also provided with a limiting block corresponding to the limiting groove.

5. A high-strength steel wire anchor according to any one of claims 1 to 4, characterized in that: The connector of the fixed anchor head has several waist-shaped holes through which anchor bolts pass, and the waist-shaped holes extend laterally.

6. A high-strength steel wire anchor according to claim 5, characterized in that: Several of the first anti-reverse grooves are longitudinally connected and / or several of the second anti-reverse grooves are longitudinally connected.

7. A high-strength steel wire anchor installation process, based on the high-strength steel wire anchor as described in claim 5, characterized in that: Includes the following steps: S1: Preliminary preparation, a groove is opened on the bridge for the first anchor plate and the second anchor plate, and the corresponding anchor bolts are embedded in the groove. S2: High-strength steel wire fixing: First, pass both ends of the high-strength steel wire through the wire hole. Then, use a wire-pressing machine to press the ends of the high-strength steel wire. After pressing, place the pressed ends of the high-strength steel wire in the first anti-reverse groove. Then, place the pressure plate in the groove and lock the pressure plate and the fixing plate with locking screws. S3: Installation of high-strength steel wire anchors: Place the high-strength steel wire anchors on the bridge, ensuring that the first and second anchor plates are located in the corresponding grooves, and that the anchor bolts on the grooves pass through the corresponding anchor holes, and then tighten the anchor bolts. S4: High-strength steel wire anchor assembly, install the fixed anchor head in the installation groove of the first anchor plate, and make the limiting block located in the corresponding limiting groove, and place the tensioning anchor head in the sliding groove of the second anchor plate, and then install the tensioning bolt on the second anchor plate, and make the tensioning bolt threadedly connected to the connector on the tensioning anchor head; S5: Tensioning high-strength steel wire, install the counter-support frame on the connector of the tensioning anchor head through the reaction frame mounting bolts, then install the tensioner, and the tensioner will work to push the tensioning anchor head to move laterally, thereby tightening the high-strength steel wire. When the high-strength steel wire reaches the design tension value, tighten the locking nut on the tensioning bolt, and then disassemble the tensioner and the reaction frame.

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