CN216239871U - An external prestressed reinforcement system of a broken-line dispersed anchor - Google Patents

Abstract

The utility model provides a broken line type external prestress reinforcement system for a dispersion anchor, which comprises two anchor units (1), at least one steel strand (2) and a plurality of vibration reduction cable clamps (3), wherein the two anchor units (1) are respectively arranged at two ends of the bottom surface of a bridge, the anchor units (1) anchor the steel strand (2) and enable the steel strand (2) to be bent downwards in a broken line manner at the two ends, the vibration reduction cable clamps (3) are uniformly arranged on the bottom surface of the bridge between the anchor units (1), and the steel strand (2) penetrates through the vibration reduction cable clamps (3). The utility model ensures higher reinforcing efficiency through the end part steering and dispersing anchoring device and simultaneously meets the requirements of tensioning and anchoring structure and stress.

Description

An external prestressed reinforcement system of a broken-line dispersed anchor

technical field

The utility model relates to the field of structural reinforcement, in particular to an external prestress reinforcement system of a broken line type dispersed anchor.

Background technique

The external prestressing method is a reliable method for the reinforcement of concrete structures. By actively applying external prestressing to the structure, it can achieve the purpose of improving the structural stress distribution under the dead load state, and improving the crack resistance and bearing capacity of the structure. The common external prestressed reinforcement system is composed of prestressed structures (such as high-strength steel strands, high-strength steel wires, high-strength steel bars, and high-strength carbon fiber boards, etc.) and anchoring structures. The external prestressing of broken lines needs to be set up with steering structures, and the prestressed structures have free length. When it is larger, a vibration damping structure needs to be installed.

In the external prestressing reinforcement of beam structures, for small and medium-span simply supported T beams, the main external prestressing reinforcement methods currently used are: There are two ways of arranging the prestressed carbon fiber plates in a straight line on the bottom surface: the former is similar to the external prestressing arranged in the box girder, and the overall steel bundle with a larger cross-sectional area is used, which requires reliable steering and anchoring devices; the latter is arranged at the bottom of the beam, which can obtain High reinforcement efficiency, and the carbon fiber board is arranged close to the bottom of the beam, which has little effect on the clearance under the bridge, but the prestressed carbon fiber board needs to use special anchors and fixtures, and the production process control requirements of carbon fiber boards and anchor fixtures are high, and the yield rate is high. Relatively low, the cost of high-quality prestressed carbon fiber board reinforcement system is high, and although carbon fiber board has high tensile strength, it has the disadvantage of low flexural strength, and it is easy to be damaged due to vehicle scratches during operation. In addition, carbon fiber The fire resistance of the plate is poor, and the prestressing system may suddenly fail after the prestressing system is caught on fire, which brings unpredictable risks to the structure and the safety of pedestrians and vehicles passing under the bridge.

There is now a need for a broken-line dispersed anchor external prestressed reinforcement system, which adopts the external bundles arranged at the broken line at the bottom of the beam, and through the end turning and dispersed anchoring device, to ensure that the structure of tension and anchoring can be achieved while achieving high reinforcement efficiency. and stress requirements.

SUMMARY OF THE INVENTION

In order to solve the problem of low flexural strength of linearly arranged prestressed carbon fiber plates in the prior art, the risk of damage to the reinforcement structure by being scratched by passing vehicles, and the problem of stress concentration in the anchoring area of large-area external prestressed steel strands, the utility model provides A broken-line dispersed anchoring body external prestressing reinforcement system is proposed, which adopts the method of laying a plurality of small-area high-strength steel strands on the bottom surface of the beam body to carry out the external broken-line prestressing reinforcement of the beam body, and solves the above problems.

The external prestressing reinforcement system of broken-line dispersed anchors provided by the utility model comprises two anchoring units, at least one steel strand and several vibration-absorbing cable clips. The unit anchors the steel strand and bends the steel strand downward in a broken line at both ends. The damping cable clips are evenly arranged on the bottom surface of the bridge between the anchor units, and the steel strand passes through the damping cable clips; the anchoring unit includes Anchoring seat, anchors with the same number of steel strands and steering gears with the same number of steel strands, the anchoring seat is a plate structure, the anchoring seat is arranged on the bottom surface of both ends of the bridge through connecting bolts, and the anchoring device is arranged on the lower surface of the anchoring seat , the steering gear is arranged under the anchoring seat through the connecting bolt, the steering gear functional area is coaxial with the anchoring functional area, and the steering gear functional area is arranged on the upper surface of the steering gear.

For the external prestressed reinforcement system of broken-line dispersed anchors described in the present invention, as a preferred method, the anchoring unit includes an anchoring seat, an anchoring device with the same number of steel strands, and a diverter with the same number of steel strands, and the anchoring seat It is a plate-like structure, the anchoring seat is arranged on the bottom surface of both ends of the bridge through connecting bolts, the anchoring device is arranged on the lower surface of the anchoring seat, the diverter is arranged under the anchoring seat through connecting bolts, and the functional area of the steering device and the functional area of the anchoring device are coaxial. The steering gear functional area is arranged on the upper surface of the steering gear.

In the external prestressing reinforcement system of the broken-line dispersed anchor body according to the present invention, as a preferred mode, the anchoring device includes a first fixing plate, a second fixing plate, a supporting plate, an anchoring plate and an anchoring plate, and the first fixing plate is connected to the anchor plate. The second fixing plate is arranged parallel to the bottom surface of the anchoring seat, the supporting plate is arranged on one side of the first fixing plate and the second fixing plate and is perpendicular to the first fixing plate and the second fixing plate, and the supporting plate connects the plate surface of the first fixing plate and the supporting plate The opposite sides of the plates are parallel, the angle between the support plate on the side connecting the first fixed plate and the second fixed plate and the anchoring seat is an acute angle, the other side of the support plate is in contact with the anchor plate, and the free surface of the anchor plate is set in contact with the anchor plate The plate, the anchor plate, the anchor plate and the support plate are provided with through holes on the same plate surface for passing the steel strand, and the anchor plate is used for anchoring the steel strand.

For the external prestressing reinforcement system of the broken-line dispersed anchor body described in the present invention, as a preferred way, the diverter includes a diverter body, a guide groove and a number of pairs of mounting screw holes, the diverter body is a strip-shaped structure, and the diverter body is a strip-shaped structure. The level of the upper surface of one end of the body is lower than the level of the upper surface of the other end of the steering gear body. The mounting screw holes are symmetrically and vertically arranged on both sides of the steering gear body. The upper surface is provided with guide grooves along the slope of the upper surface.

As a preferred method of the external prestressing reinforcement system of the broken-line dispersed anchor body described in the utility model, the upper surface of the diverter is lowered toward both sides of the bridge.

As a preferred method for the external prestressing reinforcement system of the broken-line dispersed anchors of the present invention, the mounting bolts of the steering gear are covered with spacers above the steering gear, and the height of the spacers gradually increases toward both ends of the bridge.

In the fold-line dispersed anchor external prestressing reinforcement system described in the present invention, as a preferred way, the vibration damping cable clamp includes a limit steel piece, a number of elastic blocks and anchor bolts, and the upper surface of the limit steel piece is provided with a number of longitudinal Limit through slot, the elastic block is arranged inside the limit through slot, the elastic block is provided with a number of longitudinal through holes, the sum of the longitudinal through holes of each elastic block is equal to the number of steel strands, the steel strand passes through the longitudinal through holes, and the limit The steel piece and the elastic block are provided with vertical installation holes which are projected out of position with the longitudinal through holes in the direction of the vertical longitudinal through holes, and the anchor bolts install the limit steel pieces on the bottom surface of the bridge through the installation holes.

The beneficial effects of the utility model are as follows:

(1) The beam body is prestressed externally by laying multiple small-area high-strength steel strands on the bottom surface of the beam body, which facilitates the decentralized anchoring of the steel bundles through a small anchoring structure and reduces the stress concentration effect in the anchoring area;

(2) Considering the need for anchoring and tensioning space at both ends of the steel bundle, the distance between the steel bundle and the bottom of the beam is too large, which significantly reduces the headroom at the bottom of the beam and increases the damage to the reinforcement structure caused by the passing vehicles. By setting a steering device at the end of the steel bundle, the purpose of adding a steel bundle in the middle of the span does not significantly reduce the headroom under the bridge;

(3) The steering device is arranged near the anchoring end of the steel bundle, and adopts modular small steel components, which are reliable in force, small and flexible, and easy to assemble;

(4) In order to reduce the adverse effect of structural vibration on the prestressed beams during operation, the prestressed tendons are arranged with a certain distance in the longitudinal direction, and the vibration-damping cable clips are arranged to adapt to the characteristics that the net distance between the steel beams and the bottom of the beam is small;

(5) The cable clamp adopts a small anti-buckle limit steel piece, and a modular vibration damping rubber for easy installation is provided between the steel piece and the steel strand (with PE protection).

Description of drawings

Figure 1 is a schematic diagram of a broken-line dispersed anchor external prestressed reinforcement system;

Fig. 2 is a schematic diagram of an anchor unit of a broken-line dispersed anchor body external prestressed reinforcement system;

Figure 3 is a schematic diagram of a broken-line dispersed anchor external prestressed reinforcement system anchorage;

FIG. 4 is a schematic diagram of a diverter of a broken-line dispersed anchor external prestressed reinforcement system;

FIG. 5 is a schematic diagram of a vibration-absorbing cable clamp of a broken-line dispersed anchor external prestressed reinforcement system.

Reference number:

1. Anchoring unit; 11. Anchoring seat; 12. Anchoring device; 121. First fixing plate; 122. Second fixing plate; 123. Supporting plate; 124. Anchoring plate; 131, steering gear body; 132, guide groove; 133, installation screw holes; 2, steel strand; 3, vibration damping cable clamp; 31, limit steel parts; 32, elastic block;

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

Example 1

As shown in Fig. 1, a broken-line scattered anchor external prestressing reinforcement system includes two anchoring units 1, at least one steel strand 2 and several vibration-absorbing cable clips 3, and the two anchoring units 1 are respectively arranged on two sides of the bottom surface of the bridge. At the end position, the anchoring unit 1 anchors the steel strand 2 and bends the steel strand 2 downward in a folded line at both ends. Pass through the vibration damping cable clip 3.

As shown in FIG. 2, the anchoring unit 1 includes an anchoring seat 11, an anchoring device 12 having the same number as the steel strand 2, and a diverter 13 having the same number as the steel strand 2. The anchoring seat 11 is a plate-like structure, and the anchoring seat 11 passes through The connecting bolts are arranged on the bottom surfaces of both ends of the bridge, the anchors 12 are arranged on the lower surface of the anchoring seat 11, the steering gear 13 is arranged under the anchoring seat 11 through the connecting bolts, the functional area of the steering gear 13 and the functional area of the anchoring gear 12 are coaxial, and the steering gear 13 The functional area is arranged on the upper surface of the steering gear 13 .

As shown in FIG. 3 , the anchor 12 includes a first fixing plate 121 , a second fixing plate 122 , a supporting plate 123 , an anchoring plate 124 and an anchoring plate 125 . The first fixing plate 121 and the second fixing plate 122 are arranged parallel to the anchoring plate 121 . On the bottom surface of the seat 11, the support plate 123 is disposed on one side of the first fixed plate 121 and the second fixed plate 122 and is perpendicular to the first fixed plate 121 and the second fixed plate 122, and the support plate 123 connects the plate surface of the first fixed plate 121 and the support The opposite faces of the plates 123 are parallel, the angle between the supporting plate 123 on the side connecting the first fixing plate 121 and the second fixing plate 122 and the anchoring seat 11 is an acute angle, and the other side of the supporting plate 123 is in contact with an anchor plate 125, and the anchor plate The free surface of the plate 125 is arranged in contact with the anchor plate 124. The anchor plate 124, the anchor plate 125 and the support plate 123 are provided with through holes for passing the steel strand 2 on the same plate surface, and the anchor plate 124 is used for anchoring the steel strand. line 2.

As shown in FIG. 4 , the diverter 13 includes a diverter body 131, a guide groove 131 and several pairs of mounting screw holes 133. The diverter body 131 is a strip-shaped structure, and the level of the upper surface of one end of the diverter body 131 is lower than that of the diverter. The upper surface of the other end of the main body 131 is at the level of the upper surface. The mounting screw holes 133 are symmetrically and vertically arranged on both sides of the steering gear body 131 for fixing the steering gear body 131 under the anchoring seat 11 through mounting bolts. The upper surface of the steering gear body 131 is along the upper The surface slope is provided with the guide groove 131 . The upper surface of the diverter 13 is lowered toward both sides of the bridge. The mounting bolts of the steering gear 13 are covered with spacers above the steering gear 13, and the height of the spacers gradually increases toward both ends of the bridge.

As shown in FIG. 5 , the vibration damping cable clamp 3 includes a limit steel piece 31 , a plurality of elastic blocks 32 and an anchor bolt 33 . The upper surface of the limit steel piece 31 is provided with a number of longitudinal limit through grooves, and the elastic block 32 is arranged in the limit Inside the through slot, the elastic block 32 is provided with a number of longitudinal through holes, the sum of the longitudinal through holes of each elastic block 32 is equal to the number of steel strands 2, the steel strands 2 pass through the longitudinal through holes, the limiting steel piece 31 and the elastic block 32 is provided with a vertical installation hole that is different from the projection of the longitudinal through hole in the direction perpendicular to the longitudinal through hole, and the anchor bolt 33 installs the limiting steel piece 31 on the bottom surface of the bridge through the installation hole.

The height of the elastic block 32 is smaller than the height of the limiting steel piece 31 .

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (6)

1. An external prestressed reinforcement system of broken-line dispersed anchors, characterized in that: it comprises two anchoring units (1), at least one steel strand (2) and a number of vibration-damping cable clips (3), two of the anchoring units (1). The units (1) are respectively arranged at both ends of the bottom surface of the bridge, and the anchoring unit (1) anchors the steel strand (2) and bends the steel strand (2) downward in a folded line at both ends, The vibration-damping cable clips (3) are evenly arranged on the bottom surface of the bridge between the anchoring units (1), and the steel strands (2) pass through the vibration-damping cable clips (3); the anchorage The unit (1) comprises an anchoring seat (11), an anchor (12) with the same number as the steel strand (2), and a diverter (13) with the same number as the steel strand (2). The seat (11) is a plate-like structure, the anchoring seat (11) is arranged on the bottom surfaces of both ends of the bridge by connecting bolts, the anchoring device (12) is arranged on the lower surface of the anchoring seat (11), and the diverter ( 13) The connecting bolts are arranged below the anchoring seat (11), the functional area of the diverter (13) is coaxial with the functional area of the anchor (12), and the functional area of the diverter (13) is arranged in the The upper surface of the diverter (13). 2 . The external prestressed reinforcement system of a broken-line dispersed anchor according to claim 1 , wherein the anchor ( 12 ) comprises a first fixing plate ( 121 ), a second fixing plate ( 122 ), a support A plate (123), an anchoring plate (124) and an anchoring plate (125), the first fixing plate and the second fixing plate are arranged in parallel on the bottom surface of the anchoring seat (11), the supporting plate (123) are arranged on one side of the first fixing plate (121) and the second fixing plate (122) and are perpendicular to the first fixing plate (121) and the second fixing plate (122), and the support plate ( 123) The plate surface connecting the first fixing plate (121) is parallel to the opposite surface of the supporting plate (123), and the supporting plate (123) is connecting the first fixing plate (121) and the second The angle between one side of the fixing plate (122) and the anchoring seat (11) is an acute angle, and the other side of the supporting plate (123) is in contact with the anchor plate (125), and the anchor plate (125) ) The anchoring plate (124) is arranged in contact with the free surface, and the anchoring plate (124), the anchoring plate (125) and the supporting plate (123) are provided with a A through hole through which the strand (2) passes, and the anchor plate (124) is used for anchoring the steel strand (2). 3 . The external prestressed reinforcement system of a broken-line dispersed anchor according to claim 1 , wherein the diverter ( 13 ) comprises a diverter body ( 131 ), a guide groove ( 132 ) and a plurality of pairs of mounting screw holes (133), the diverter body (131) is a strip-shaped structure, the level of the upper surface of one end of the diverter body (131) is lower than the level of the upper surface of the other end of the diverter body (131), The mounting screw holes (133) are symmetrically and vertically arranged on both sides of the steering gear body (131), and are used for fixing the steering gear body (131) under the anchoring seat (11) through mounting bolts, so A guide groove (132) is provided on the upper surface of the diverter body (131) along the slope of the upper surface. 4 . The external prestressing reinforcement system of broken-line dispersed anchors according to claim 3 , wherein the upper surface of the diverter ( 13 ) is lowered toward both sides of the bridge. 5 . 5. A broken-line dispersed anchor external prestressing reinforcement system according to claim 4, characterized in that: the mounting bolts of the diverter (13) are sleeved with spacers above the diverter (13), so The height of the pads increases gradually toward the ends of the bridge. 6 . The external prestressed reinforcement system of broken-line dispersed anchors according to claim 1 , wherein the vibration-damping cable clamp (3) comprises a limit steel piece (31), a plurality of elastic blocks (32) and An anchor bolt (33), the upper surface of the limiting steel member (31) is provided with a plurality of longitudinal limiting through grooves, the elastic block (32) is arranged inside the limiting through groove, and the elastic block (32) ) is provided with a plurality of longitudinal through holes, the sum of the longitudinal through holes of each elastic block (32) is equal to the number of the steel strands (2), and the steel strands (2) pass through the longitudinal through holes , the limiting steel piece (31) and the elastic block (32) are provided with vertical mounting holes that are projected out of the longitudinal through hole in the direction perpendicular to the longitudinal through hole, and the anchor bolt (33) The limiting steel member (31) is installed on the bottom surface of the bridge through the installation hole.

Images