A prestressed fiber cloth tension system applied to bridge reinforcement construction

Abstract

A kind of prestressed fiber cloth tensioning system applied to bridge reinforcement construction, relate to the method for reinforcing bridge, including fixed mechanism, fiber cloth and tensioning mechanism;Fixed mechanism includes thin steel plate and two groups of pressing tool;Tensioning mechanism includes tensioning fixed seat, counter-force block, jack, round shaft, screw rod and pressing plate;Jack is connected between tensioning fixed seat and counter-force block, sets up tensioning stroke groove on tensioning fixed seat, round shaft is arranged in tensioning stroke groove, and round shaft is connected with counter-force block by screw rod;Pressing plate is set on the side of tensioning fixed seat, and pressing plate is connected with tensioning fixed seat by support;Strut is set between pressing plate and tensioning fixed seat;One end of fiber cloth is pressed between thin steel plate and bridge, and fiber cloth is pressed by pressing tool, and after passing through pressing plate and strut, the other end passes through strut and pressing plate again.Fiber cloth avoids collapse, sliding phenomenon in the process of tensioning.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for reinforcing a bridge, in particular to a prestressed carbon fiber cloth tensioning system. BACKGROUND

[0002] With the rapid development of China's economy, the transportation industry has also developed rapidly. However, due to the influence of the economy, technology, transportation demand and other factors at that time, the design load of some road bridges is generally low, the bridge deck is too narrow, which leads to serious lack of use function, serious decline of bearing capacity, and various problems of the overall structure of the bridge. In recent years, the fiber cloth and plate reinforcement method has become mature, and good reinforcement effect has been achieved. However, if fiber plates are used, the gap between the plates needs to be filled with anchor nails to form a patch, which is harmful to the landscape of the bridge. If fiber cloth is used, such as the invention patent with the announcement number CN201695347U, two tensioning assemblies are used, and the fiber cloth is prone to collapse and slip during the tensioning process. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a prestressed fiber cloth tensioning system applied in the reinforcement construction of a bridge. The fiber cloth avoids collapse and slip during the tensioning process.

[0004] The application aims at realizing a prestressed fiber cloth tensioning system applied to bridge reinforcement construction, which comprises a fixing mechanism located at the lower surface of the bridge, fiber cloth and a tensioning mechanism; the fixing mechanism comprises a thin steel plate and two groups of pressing tools, the thin steel plate is connected with the bridge through first bolts, and the two groups of pressing tools are connected at the two ends of the thin steel plate respectively; the pressing tool comprises a bottom plate, a side plate, a handle and a pressing rod, the bottom plate is connected with the thin steel plate, the side plate is connected with the bottom plate perpendicularly, one end of the handle is integrally provided with an eccentric sleeve, the eccentric sleeve is hinged with the side plate through a hinge shaft, the hinge shaft is eccentrically arranged with the eccentric sleeve, the eccentric sleeve forms a long radius part and a short radius part, after the handle is rotated, the long radius part of the eccentric sleeve abuts against the bottom plate, one end of the pressing rod is connected with the handle, the other end of the pressing rod is provided with an adjusting rod, and the adjusting rod is connected with a pressing block; the tensioning mechanism comprises a tensioning fixing base, a counterforce block, a jack, a round shaft, a lead screw and a pressing plate; the tensioning fixing base is connected with the bridge, the tensioning fixing base is in the shape of an open rectangle at one end, and the opening direction of the tensioning fixing base is towards the fixing mechanism; the counterforce block is arranged at the side of the tensioning fixing base away from the fixing mechanism, the jack is connected between the tensioning fixing base and the counterforce block, a tensioning stroke groove is arranged on the tensioning fixing base, the round shaft is arranged in the tensioning stroke groove, and the round shaft is connected with the counterforce block through the lead screw; a pressing plate is arranged at the side of the tensioning fixing base towards the fixing mechanism, and the pressing plate is connected with the tensioning fixing base through a support; a pressing strip is arranged between the pressing plate and the tensioning fixing base, and the pressing strip is connected with the bridge through second bolts; one end of the fiber cloth is pressed between the thin steel plate and the bridge, and the fiber cloth is pressed by the pressing tool, the fiber cloth winds around the round shaft after passing through the pressing plate and the pressing strip, and the other end of the fiber cloth passes through the pressing strip and the pressing plate again.

[0005] The tensioning stroke groove of the application has two, which are arranged at the two sides of the tensioning fixing base respectively; two positioning grooves are arranged radially on the round shaft, and the round shaft at the positioning groove is arranged in the tensioning stroke groove; the round shaft moves in the tensioning stroke groove and cannot move axially.

[0006] The application connects a stop rod on the tensioning fixing base, and the other end of the stop rod is arranged below the counterforce block.

[0007] The pressing plate of the application is arc-shaped towards the fiber cloth.

[0008] The adjusting rod of the application is worn on the pressing rod, two nuts are threadedly connected on the adjusting rod, and the two nuts are located at the upper and lower sides of the pressing rod respectively.

[0009] The pressing block of the application is arc-shaped towards the fiber cloth.

[0010] The beneficial effect of the present application is that during construction, one end of the fiber cloth is pressed between the thin steel plate and the bridge, and the fiber cloth is pressed by the pressing block, the fiber cloth is wound around the round shaft after being pressed by the pressing plate and the pressing strip, and the other end is pressed by the pressing strip and the pressing plate. The tensioning is carried out by the jack on the counterforce block, and the counterforce block and the round shaft are connected by high-strength silk rods to ensure the strength of the tensioning end. The pressing plate ensures that the fiber cloth is evenly stressed during tensioning, and reduces the collapse and sliding phenomenon of the fiber cloth during tensioning. The system is arranged parallel to the working surface, is simple to install, has clear stress, and is suitable for bridge reinforcement work. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The appearance of the present application.

[0012] Figure 2 The Figure 1 middle A view.

[0013] Figure 3 The Figure 2 middle B-B view.

[0014] Figure 4 The Figure 1 middle C part enlarged view.

[0015] In the figure, 1 is a fixed mechanism, 2 is a fiber cloth, 3 is a tensioning mechanism, 4 is a thin steel plate, 5 is a pressing tool, 6 is a first bolt, 7 is a bottom plate, 8 is a side plate, 9 is a handle, 10 is a pressing rod, 11 is an eccentric sleeve, 12 is a hinge shaft, 13 is an adjusting rod, 14 is a nut, 15 is a pressing block, 16 is a tensioning fixing seat, 17 is a counterforce block, 18 is a jack, 19 is a round shaft, 20 is a silk rod, 21 is a pressing plate, 22 is a tensioning stroke groove, 23 is a positioning groove, 24 is a support, 25 is a pressing strip, 26 is a second bolt, and 27 is a blocking rod. DETAILED DESCRIPTION

[0016] As Figures 1 to 4 shown, the prestressed fiber cloth tensioning system applied to bridge reinforcement construction includes a fixed mechanism 1 located on the lower surface of the bridge, a fiber cloth 2 and a tensioning mechanism 3.

[0017] The fixed mechanism 1 includes a thin steel plate 4 and two groups of pressing tools 5, and the thin steel plate 4 is connected with the bridge through a first bolt 6.

[0018] The two compression tools 5 are arranged at the two ends of the thin steel plate 4 respectively, and each of the compression tools 5 comprises a bottom plate 7, a side plate 8, a handle 9 and a pressing rod 10. The bottom plate 7 is connected with the thin steel plate 4, and the side plate 8 is connected with the bottom plate 7 perpendicularly. One end of the handle 9 is integrally provided with an eccentric sleeve 11, and the eccentric sleeve 11 is hingedly connected with the side plate 8 through a hinge shaft 12. The hinge shaft 12 is arranged eccentrically with the eccentric sleeve 11. The eccentric sleeve 11 forms a long radius part and a short radius part. After the handle 9 is rotated, the long radius part of the eccentric sleeve 11 abuts against the bottom plate 7. After the handle 9 is reversely rotated, the long radius part of the eccentric sleeve 11 is away from the bottom plate 7. One end of the pressing rod 10 is connected with the handle 9, and the other end of the pressing rod 10 penetrates through an adjusting rod 13. Two nuts 14 are threadedly connected on the adjusting rod 13, and the two nuts 14 are arranged on the upper and lower sides of the pressing rod 10 respectively. The adjusting rod 13 is connected with a pressing block 15.

[0019] One end of the fiber cloth 2 is pressed between the thin steel plate 4 and the bridge, and the fiber cloth 2 is pressed by the pressing block 15. The surface of the pressing block 15, which faces the fiber cloth 2, is arc-shaped.

[0020] The tensioning mechanism 3 comprises a tensioning fixing base 16, a counter-force block 17, a jack 18, a round shaft 19, a lead screw 20 and a pressing plate 21. The tensioning fixing base 16 is connected with the bridge. The tensioning fixing base 16 is in the shape of an open rectangle, and the opening direction of the tensioning fixing base 16 faces the fixing mechanism 1. Tensioning stroke grooves 22 are arranged on the two sides of the tensioning fixing base 16.

[0021] Two positioning recesses 23 are arranged radially on the round shaft 19. The round shaft 19 penetrates through the tensioning fixing base 16, and the round shaft 19 at the positioning recesses 23 is arranged in the tensioning stroke grooves 22. The round shaft 19 moves in the tensioning stroke grooves 22 and cannot move axially. The round shaft 19 is connected with the counter-force block 17 through the lead screw 20. The pressing plate 21 is arranged on the side of the tensioning fixing base 16, which faces the fixing mechanism 1. The pressing plate 21 is connected with the tensioning fixing base 16 through a support 24. The surface of the pressing plate 21, which faces the fiber cloth 2, is arc-shaped. A pressing strip 25 is arranged between the pressing plate 21 and the tensioning fixing base 16. The pressing strip 25 is connected with the bridge through a second bolt 26. A stop rod 27 is connected with the tensioning fixing base 16. The other end of the stop rod 27 is arranged below the counter-force block 17.

[0022] The fiber cloth 2 passes through the pressing plate 21 and the pressing strip 25, and then winds around the round shaft 19. The other end of the fiber cloth 2 passes through the pressing strip 25 and the pressing plate 21 again.

[0023] In construction, one end of the fiber cloth 2 is pressed between the thin steel plate 4 and the bridge, after rotating the handle 9, the long radius part of the eccentric sleeve 11 is against the bottom plate 7, and drives the pressing block 15 to rotate and press the fiber cloth 2, the fiber cloth 2 passes through the pressing plate 21 and the pressing strip 25, and then winds around the round shaft 19, and the other end passes through the pressing strip 25 and the pressing plate 21 again. The tension is given to the counterforce block 17 by the jack 18, and the counterforce block 17 is connected with the round shaft 19 by using the high-strength screw rod 20, so as to ensure the strength of the tension end. The pressing plate 21 ensures that the fiber cloth 2 is uniformly stressed during the tensioning process, and reduces the collapse and sliding phenomenon of the fiber cloth 2 during the tensioning process. The system is arranged parallel to the operation surface, is simple to install, has clear stress, and is suitable for bridge reinforcement operation.

[0024] The fiber cloth 2 is wound on the round shaft 19, and is fixed by being clamped and glued through the pressing plate 21 and the pressing strip 25, and then the tensioning process is carried out. The tensioning stress structure achieves the following effects in actual use.

[0025] 1. Clear structure stress

[0026] During the tensioning process of the tensioning mechanism, the fiber cloth is parallel to the tensioning operation surface, so that the stress of the clamp end can be uniformly ensured, and ideal effect is achieved in actual operation. Compared with the tensioning end of other wedge-shaped block clamps, the fiber cloth is wound and held differently, the device reduces the stress concentration phenomenon in the tensioning process, and avoids the collapse and sliding phenomenon of the fiber cloth in the tensioning end clamp.

[0027] The device can uniformly distribute the transverse compressive stress of the fiber cloth during the tensioning process, so that the tensioning effect of the fiber cloth reaches the design state.

[0028] 2. Low mold processing cost

[0029] Compared with other tensioning wedge-shaped block clamps, the tensioning mechanism has a greatly reduced manufacturing cost. The wedge-shaped block clamp needs to consider the production and manufacturing cost, tolerance and the influence of later deformation, and other factors. The manufacturing and maintenance cost is much higher than that of the device.

[0030] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A prestressed fiber cloth tensioning system applied in bridge reinforcement construction, comprising a fixing mechanism located at the lower surface of the bridge, a fiber cloth and a tensioning mechanism; characterized in that: the fixing mechanism comprises a thin steel plate and two sets of pressing tools, the thin steel plate is connected with the bridge through first bolts, and the two sets of pressing tools are connected at the two ends of the thin steel plate; the pressing tool comprises a base plate, a side plate, a handle and a pressing rod, the base plate is connected with the thin steel plate, the side plate is connected with the base plate perpendicularly, one end of the handle is integrally provided with an eccentric sleeve, the eccentric sleeve is hinged with the side plate through a hinge shaft, the hinge shaft is eccentrically arranged with the eccentric sleeve, the eccentric sleeve forms a long radius part and a short radius part, after the handle is rotated, the long radius part of the eccentric sleeve abuts against the base plate, one end of the pressing rod is connected with the handle, the other end of the pressing rod is provided with an adjusting rod, and the adjusting rod is connected with a pressing block; the tensioning mechanism comprises a tensioning fixing base, a counterforce block, a jack, a round shaft, a lead screw and a pressing plate; the tensioning fixing base is connected with the bridge, the tensioning fixing base is in the shape of an open rectangle at one end, and the opening direction of the tensioning fixing base faces the fixing mechanism; the counterforce block is arranged on the side of the tensioning fixing base away from the fixing mechanism, the jack is connected between the tensioning fixing base and the counterforce block, a tensioning stroke groove is arranged on the tensioning fixing base, the round shaft is arranged in the tensioning stroke groove, and the round shaft is connected with the counterforce block through the lead screw; a pressing plate is arranged on the side of the tensioning fixing base facing the fixing mechanism, the pressing plate is connected with the tensioning fixing base through a support; a pressing strip is arranged between the pressing plate and the tensioning fixing base, and the pressing strip is connected with the bridge through second bolts; one end of the fiber cloth is pressed between the thin steel plate and the bridge, and the fiber cloth is pressed by the pressing tool, the fiber cloth winds around the round shaft after passing through the pressing plate and the pressing strip, and the other end of the fiber cloth passes through the pressing strip and the pressing plate again; the side of the pressing plate facing the fiber cloth is arc-shaped.

2. The prestressed fiber sheet tensioning system applied to the bridge reinforcement construction according to claim 1, characterized in that: The tensioning stroke groove has two, which are arranged on the two sides of the tensioning fixing base respectively; two positioning grooves are arranged radially on the round shaft, and the round shaft at the positioning groove is arranged in the tensioning stroke groove; the round shaft moves in the tensioning stroke groove and cannot move axially.

3. The prestressed fiber sheet tensioning system applied to the bridge reinforcement construction according to claim 1, characterized in that: A stop rod is connected on the tensioning fixing base, and the other end of the stop rod is arranged below the counterforce block.

4. The prestressed fiber sheet tensioning system applied to the bridge reinforcement construction according to claim 1, characterized in that: The adjusting rod is worn on the pressing rod, two nuts are threadedly connected on the adjusting rod, and the two nuts are located on the upper and lower sides of the pressing rod respectively.

5. The prestressed fiber sheet tensioning system applied to the bridge reinforcement construction according to claim 1, characterized in that: The side of the pressing block facing the fiber cloth is arc-shaped.

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