KR102585929B1 - Method and Apparatus for Reinforcing the Parent Moment of the Bridge Structure - Google Patents

Abstract

The present invention is a method and device for reinforcing the negative moment of a bridge structure, by installing strands, some of which are disposed on the upper surfaces of the bridge main body and the cantilever portion, and the other portions, which are disposed through the cantilever portion at a predetermined angle, to reduce the tension of the strands. A method and device for reinforcing the negative moment of a bridge structure, which can increase the structural stability of the bridge structure by reinforcing the negative moment at the connection portion of the bridge main body and the cantilever portion by generating an upward force in the cantilever portion. It's about.

Description

Method and Apparatus for Reinforcing the Parent Moment of the Bridge Structure}

The present invention is a method and device for reinforcing the negative moment of a bridge structure, by installing strands, some of which are disposed on the upper surfaces of the bridge main body and the cantilever portion, and the other portions, which are disposed through the cantilever portion at a predetermined angle, to reduce the tension of the strands. A method and device for reinforcing the negative moment of a bridge structure, which can increase the structural stability of the bridge structure by reinforcing the negative moment at the connection portion of the bridge main body and the cantilever portion by generating an upward force in the cantilever portion. It's about.

A cantilever is a beam that is fixed at one end and not supported at the other end. It supports the bending moment and shear force that occurs at the fixed end and is constructed to install an expandable footbridge for pedestrians on the left and right sides of the bridge structure. You can.

Meanwhile, when a load is continuously applied to the cantilever, the structural safety of the connection between the main body of the bridge structure and the cantilever may be reduced. In addition, the structural stability of the bridge structure is weakened due to the deterioration of the concrete at the connection, loosening the bond between the concrete and the reinforcing bar, or water seeping into the loosened concrete, which can eventually cause an accident in which the bridge structure collapses. there is.

Meanwhile, Domestic Registered Patent No. 10-1765044 is a cantilever-type footbridge with a shear reinforcement material inserted into the connection area, and is a cantilever type footbridge with a shear reinforcement material inserted into the connection area to increase the adhesion between the fixed end of the girder and the connection area of the bridge. A footbridge is being built. However, this technology is intended to increase the adhesion between the girder and the bridge, and there is no disclosure of a configuration that improves the structural stability of the bridge structure by generating an upward force on the bridge side.

As a result, there is a need to develop a method that can resist the moment and shear force generated at the connection portion of the cantilever portion by generating an upward force on the cantilever side in a cantilever bridge structure.

Domestic registered patent KR 10-1765044 B1 “Cantilever type footbridge with shear reinforcement inserted into the connection area”

The present invention is a method and device for reinforcing the negative moment of a bridge structure, by installing strands, some of which are disposed on the upper surfaces of the bridge main body and the cantilever portion, and the other portions, which are disposed through the cantilever portion at a predetermined angle, to reduce the tension of the strands. A method and device for reinforcing the negative moment of a bridge structure, which can increase the structural safety of the bridge structure by reinforcing the negative moment at the connection portion of the bridge main body and the cantilever portion by generating an upward force in the cantilever portion. The purpose is to provide.

In order to solve the above problems, as a method of reinforcing the negative moment of the bridge structure including the bridge body portion and the cantilever portion, the packaging is removed by removing a portion of the upper surface of the bridge structure across the bridge body portion and the cantilever portion. A packaging removal step that forms a part; A drilling step of drilling a hole at a predetermined interval along the width direction of the packaging removal portion from a first point at one end of the packaging removal portion on the cantilever portion through the cantilever portion at a predetermined angle to a second point on the lower surface of the cantilever portion; a plurality of first steel wire bending units for bending each of the plurality of steel wires drawn out from each of the plurality of perforations formed at the first point; A plurality of first steel wire fixing parts or a plurality of second steel wire bending parts for fixing each of the plurality of steel wires at a third point located at the other end of the packaging removal part extending from each of the plurality of first steel wire bending parts; And a first steel wire fixing part for fixing the steel wire pulled out from each of the plurality of perforations formed at the second point; a fixer installation step of installing a; A strand installation step of installing a strand, a part of which is inserted into the hole and extending from the second point to the first point, and the other part extending from the first point to the third point on the packaging removal part; A strand tensioning step of tensioning the strand and fixing the tensioned strand at the first strand anchoring portion at the second point; And a packaging step of pouring mortar and asphalt concrete into the packaging removal part to hide the first steel wire bending part, and the first steel wire fixing part or the second steel wire bending part, and packaging the third point and the second steel wire bending part. A method of reinforcing the negative moment of a bridge structure is provided, in which an upward force is generated in the cantilever portion by the tension of the strand acting between points, and the negative moment is reinforced at the connection portion of the bridge body portion and the cantilever portion.

According to one embodiment of the present invention, a method of reinforcing the negative moment of the bridge structure includes forming a plurality of carbon fibers extending from the first point to the third point while the strand is tensioned by the strand tensioning step. It further includes a carbon fiber construction step of attaching, wherein the carbon fiber is formed by a tensile force caused by the carbon fiber acting in the same direction as the tension force of the strand acting between the third point and the second point. The bonding force of the bonding surface between the bridge body portion and the cantilever portion between the second point and the third point can be strengthened.

According to one embodiment of the present invention, the first steel wire fixing part includes a first surface horizontal to the lower surface of the cantilever part; A triangular frame including a second surface, one end of which is in contact with one end of the first surface and forming a predetermined angle with the first surface, wherein the first surface and the second surface have an overall triangular shape with one side open. wealth; and a triangular support part disposed in a space between the first surface and the second surface of the triangular frame part.

According to one embodiment of the present invention, the second surface is perpendicular to an imaginary line formed by a strand inserted into the perforation, and one end of the strand drawn out from the second point penetrates the first surface to form the strand. Can be fixed on 2 sides.

According to one embodiment of the present invention, in the anchorage installation step, when the second steel strand bending part is installed at the third point, a hole is drilled in the vertical direction from the third point and positioned below the third point in the vertical direction. It further includes a second steel wire fixing part installation step of installing a second steel wire fixing part at the fourth point, wherein the steel wire installation step includes one end of the steel wire bent at the second steel wire bending part at the third point. , It can be extended to the second steel wire fixing part at the fourth point and fixed to the second steel wire fixing part.

In order to solve the above problems, it is a device for reinforcing the negative moment of the bridge structure including the bridge main body and the cantilever part, spanning the bridge main body and the cantilever part to remove the packaging of a portion of the upper surface of the bridge structure. A portion is formed, and at predetermined intervals along the width direction of the packaging removal portion, a hole is drilled from a first point at one end of the packaging removal portion on the cantilever portion through the cantilever portion at a predetermined angle to a second point on the lower surface of the cantilever portion, a plurality of first steel wire bending units for bending each of the plurality of steel wires drawn out from each of the plurality of perforations formed at the first point; A plurality of first steel wire fixing parts or a plurality of second steel wire bending parts for fixing each of the plurality of steel wires at a third point located at the other end of the packaging removal part extending from each of the plurality of first steel wire bending parts; and a first steel wire fixing part that fixes the steel wire pulled out from each of the plurality of perforations formed at the second point; a part is inserted into the perforation and extends from the second point to the first point, and the other part is inserted into the perforation and extends from the second point to the first point. installs a strand extending from the first point to the third point on the packaging removal part, tensions the strand, and anchors the tensioned strand in the first strand anchoring portion at the second point, Mortar and asphalt concrete are poured and packed in the packaging removal part to conceal the first steel wire bending part, the first steel wire fixing part, or the second steel wire bending part, and the tension force of the steel wire acting between the first point and the second point is applied. An upward force is generated in the cantilever portion, thereby reinforcing the negative moment at the connection portion of the bridge body portion and the cantilever portion.

According to one embodiment of the present invention, tension is introduced to the strand extending from the lower side of the cantilever part to the cantilever part and the bridge main body, thereby generating an upward force in the cantilever part, and the joint surface of the cantilever part and the bridge main body. By reinforcing the bonding force, the structural safety of the bridge structure can be strengthened.

According to one embodiment of the present invention, the tension of the strand can be strengthened by attaching a plurality of carbon fibers in the same direction as the strand extending from the cantilever portion to the bridge main body.

According to one embodiment of the present invention, the strand can be fixed to a member perpendicular to the strand without bending it on the lower side of the cantilever part.

According to one embodiment of the present invention, one end of the strand can be extended and anchored to the lower surface of the bridge body or cantilever part.

According to an embodiment of the present invention, the strands and carbon fibers are arranged in a direction perpendicular to the bridge axis (transverse direction) of the bridge structure, so that negative moment acting in the direction perpendicular to the bridge axis can be offset.

Figure 1 generally shows loads and member forces acting on a bridge.
Figure 2 shows steps of a method for reinforcing negative moment of a bridge structure according to an embodiment of the present invention.
Figure 3 shows a front view of a device for reinforcing the negative moment of a bridge structure according to an embodiment of the present invention.
Figure 4 shows a perspective view of a device for reinforcing the negative moment of a bridge structure according to an embodiment of the present invention.
Figure 5 shows the overall appearance of the first steel wire fixing part installed on the lower surface of the cantilever part according to an embodiment of the present invention.
Figure 6 shows a detailed view of the first steel wire fixing unit according to an embodiment of the present invention.
Figure 7 shows a first steel wire bending part and a first steel wire fixing part according to an embodiment of the present invention.
Figure 8 shows a front view of a device for reinforcing the negative moment of a bridge structure according to another embodiment of the present invention.
Figure 9 shows a perspective view of a device for reinforcing the negative moment of a bridge structure according to another embodiment of the present invention.
Figure 10 shows a front view of a device for reinforcing negative moment of a bridge structure according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth to facilitate a general understanding of one or more aspects. However, it will also be appreciated by those skilled in the art that this aspect(s) may be practiced without these specific details. The following description and accompanying drawings set forth in detail certain example aspects of one or more aspects. However, these aspects are illustrative and some of the various methods in the principles of the various aspects may be utilized, and the written description is intended to encompass all such aspects and their equivalents.

Additionally, various aspects and features may be presented by a system that may include multiple devices, components and/or modules, etc. It is also understood that various systems may include additional devices, components and/or modules, etc. and/or may not include all of the devices, components, modules, etc. discussed in connection with the drawings. It must be understood and recognized.

As used herein, “embodiments,” “examples,” “aspects,” “examples,” etc. may not be construed to mean that any aspect or design described is better or advantageous over other aspects or designs. . The terms '~part', 'component', 'module', 'system', 'interface', etc. used below generally refer to computer-related entities, such as hardware, hardware, etc. A combination of and software, it can mean software.

Additionally, the terms “comprise” and/or “comprising” mean that the feature and/or element is present, but exclude the presence or addition of one or more other features, elements and/or groups thereof. It should be understood as not doing so.

Additionally, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are generally understood by those skilled in the art to which the present invention pertains. It has the same meaning as Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the embodiments of the present invention, have an ideal or excessively formal meaning. It is not interpreted as

Figure 1 generally shows loads and member forces acting on a bridge.

As shown in (a) of Figure 1, when the bridge structure is viewed from the front, the upper structure of the bridge structure has a bridge body portion 2 on which the load is supported by the lower structure and an outer side from the bridge body portion 2. It may include a cantilever portion 1 having a protruding structure. In general, the cantilever portion 1 may be formed to extend and protrude from the bridge body portion 2 in a direction perpendicular to the bridge axis (transverse direction).

Meanwhile, as shown, due to the load of the cantilever portion (1), a tensile force is generated in the direction perpendicular to the bridge axis at the connection portion between the cantilever portion (1) and the bridge body portion (2), and the bonding force of the cantilever portion (1) decreases. It can be. In this way, the connection between the cantilever part (1) and the bridge main part (2) may correspond to a hazardous cross section.

In addition, as shown in (b) of FIG. 1, when the bridge structure is viewed from the side, tensile force may be generated due to the load of the cantilever portion 1 that is not supported by the lower structure and the vehicle load.

Meanwhile, in the past, a method has been proposed to improve the structural safety of the bridge structure by improving the bonding force between the cantilever portion (1) and the bridge body portion (2). However, by generating an upward force in the cantilever portion (1), the cantilever portion ( There was no structure proposed to reduce the tensile force caused by the load in 1) and reinforce the negative moment.

Hereinafter, the device and construction method of the present invention to improve the above problems will be described in more detail.

Figure 2 shows the steps of a method for reinforcing the negative moment of a bridge structure according to an embodiment of the present invention, and Figures 3 and 4 show a device for reinforcing the negative moment of the present invention that can be constructed by the above steps. It shows.

As shown, the method of reinforcing the negative moment of the bridge structure including the bridge body portion (2) and the cantilever portion (1) is to span the bridge body portion (2) and the cantilever portion (1) to form the bridge structure. A packaging removal step of removing a portion of the packaging from the upper surface to form a packaging removal section; At predetermined intervals along the width direction of the packaging removal unit, from a first point at one end of the packaging removal unit on the cantilever unit 1 side, the cantilever unit 1 is penetrated at a predetermined angle to the lower surface of the cantilever unit 1. A drilling step of drilling (50) to the second point of; a plurality of first steel wire bending portions (10) for bending each of the plurality of steel wires (40) drawn out from each of the plurality of perforations (50) formed at the first point; A plurality of first steel wire fixing parts 30 or a plurality of bending parts for fixing each of the plurality of steel wires 40 at a third point located at the other end of the packaging removal part extending from each of the plurality of first steel wire bending parts 10. The second steel wire bending portion (31); And a first steel wire fixing part (20) for fixing the steel wire (40) drawn out from each of the plurality of perforations (50) formed at the second point; a fixture installation step of installing a; A strand (40) is installed, some of which are inserted into the perforation (50) and extend from the second point to the first point, and the other part extends from the first point to the third point on the packaging removal part. Strand installation stage; A strand tensioning step of tensioning the strand 40 and fixing the tensioned strand at the first strand fixing part 20 at the second point; And a packaging step of pouring mortar and asphalt concrete into the packaging removal part to hide the first steel wire bending part 10, and the first steel wire fixing part 30 or the second steel wire bending part 31. And, an upward force is generated in the cantilever part (1) due to the tension of the strand (40) acting between the third point and the second point, so that the bridge body part (2) and the cantilever part (1) The negative moment can be reinforced at the connection part of .

Specifically, the device for reinforcing the negative moment of the bridge structure of the present invention can be constructed through steps S1 to S8.

Step S1 is a packaging removal step, and a packaging removal portion can be formed by removing a portion of the upper surface of the bridge structure across the bridge body portion (2) and the cantilever portion (1). Specifically, the packaging removal part may be formed in a rectangular shape with a predetermined area when viewed from the top.

When the bridge structure is viewed from above, one side is in the direction perpendicular to the bridge axis and the other side is in the direction of the bridge axis. The pavement removal section can be formed by removing the pavement in a predetermined area.

Preferably, in the direction perpendicular to the bridge axis, a portion may be formed on the bridge body portion (2) side, and another portion may be formed on the cantilever portion (1) side.

Hereinafter, the area corresponding to the cantilever part (1) side of the packaging removal part is referred to as the first point (the point where the first steel wire bending part 10 is installed in FIG. 3), and the area corresponding to the bridge main part (2) side. is defined as the third point (the point where the first steel wire fixing part 30 is installed in FIG. 3).

Step S2 is a perforation step, and a perforation 50 can be formed that penetrates the cantilever part 1 at a predetermined angle from a point of the packaging removal part to the lower side of the cantilever part 1. Specifically, a plurality of perforations 50 may be formed by penetrating the cantilever portion 1 at predetermined intervals along the width direction (throwing direction) of the packaging removal portion. Preferably, a strand 40 may be inserted into each of the plurality of perforations 50.

That is, the perforation 50 may be formed by penetrating from the first point to the lower side of the cantilever portion 1 at a predetermined angle. Hereinafter, the point where the perforation 50 is formed on the lower side of the cantilever portion 1 is defined as the second point.

Step S3 is an anchorage installation step, and a plurality of members capable of bending or anchoring the strand 40 can be installed at each of a plurality of points of the bridge structure. Specifically, the plurality of members may be divided into a first steel wire bending part 10, a first steel wire fixing part 20, and a first steel wire fixing part 30, etc., depending on the installed location and purpose.

The first steel strand bending part 10 may be installed at a first point corresponding to the cantilever part 1 of the packaging removal part. Specifically, a plurality of first steel strand bending parts 10 may be installed at positions corresponding to each of the plurality of perforations 50 formed at predetermined intervals in the width direction (throwing direction) of the packaging removal part. Preferably, the plurality of first steel wire bending parts 10 are inserted into each of the plurality of perforations 50 and can bend the plurality of steel wires 40 drawn out toward the packaging removal unit.

The first steel wire anchoring unit 20 may be installed at a second point corresponding to the lower surface of the cantilever unit 1. Specifically, the first steel wire fixing unit 20 can fix the steel wire 40 drawn out from each of the plurality of perforations 50 formed at predetermined intervals in the axial direction on the lower surface of the cantilever part 1.

In one embodiment of the present invention, the first steel wire fixing unit 20 is a single member and can fix the steel wire 40 drawn out from each of the plurality of perforations 50. Alternatively, in another embodiment of the present invention, the first steel wire fixing unit 20 may be comprised of a plurality of members, and each member may fix the steel wire 40 drawn out from each of the plurality of perforations 50 . A more detailed description of this will be provided later.

The first steel wire fixing part 30 may be installed at a third point corresponding to the bridge main part 2 side of the pavement removal part. Specifically, from the plurality of first steel strand bending parts 10 installed at predetermined intervals in the width direction (crossing axis direction) of the packaging removal part, A plurality of first steel wire fixing parts 30 may be installed at three points. Preferably, the third point corresponds to a point extending from the first point in a direction perpendicular to the axis of the packaging removal unit, and the steel wire 40 bent at the first steel wire bending portion 10 at the first point is the third point. It extends to the first steel wire fixing part 30 at the point, and one end can be fixed to the first steel wire fixing part 30.

Meanwhile, step S4 is the second steel wire fixing unit installation step. In another embodiment of the present invention, the second steel wire bending part 31 is installed at the third point, and the second steel wire bending part 31 is installed in the vertical direction downward from the second steel wire bending part 31. A second steel wire fixing unit 90 can be further installed at the fourth location.

Preferably, the second steel wire bending portion 31 bends the steel wire 40 at the third point, and one end of the bent steel wire 40 may be fixed to the second steel wire fixing part 90 at the fourth point. . A more detailed description of this will be provided later.

Step S5 is a steel wire installation step, and the steel wire 40 can be installed in the first steel wire bending part 10, the first steel wire fixing part 20, and the first steel wire fixing part 30. Specifically, a portion of the strand 40 may be inserted into the perforation 50 penetrating the first and second points, and the other portion may extend from the second point to the third point.

Preferably, one end of the strand 40 drawn out from the second point side perforation 50 is fixed to the first strand wire fixing part 20, and a part of the strand 40 drawn out from the first point side perforation 50 is bent at the first steel wire bending part 10, and the other end of the steel wire 40 extending to the third point may be fixed to the first steel wire fixing part 30.

Meanwhile, as described above, the device for reinforcing the negative moment of the bridge structure of the present invention may further include a second steel wire fixing part (90), and in that case, the second steel wire fixing part (90) also includes a steel wire (40). This can be installed.

Step S6 is a steel wire tensioning step, in which the steel wire 40 installed in the first steel wire bending part 10, the first steel wire fixing part 20, and the first steel wire fixing part 30 is tensioned, and the steel wire 40 is tensioned. The strand 40 can be fixed in the first strand fixing unit 20. Specifically, by tensioning the strand 40, a tension force is generated in the strand 40. Preferably, an upward force is generated in the cantilever part (1) by the tension of the steel wire (40) fixed to the first steel wire fixing part (30) and the first steel wire fixing part (20), thereby reinforcing the negative moment of the bridge structure. It can also be done at the connection part between the cantilever part (1) and the bridge body part (2) by the tension of the steel wire (40) fixed to the first steel wire bending part (10) and the first steel wire fixing part (30). Bonding strength can be strengthened.

Meanwhile, in one embodiment of the present invention, in a state in which the steel wire 40 installed in the first steel wire bending part 10, the first steel wire fixing part 20, and the first steel wire fixing part 30 are tense, the packaging Carbon fiber 60 may be further installed in the removal portion parallel to the strand 40.

Specifically, step S7 is a carbon fiber construction step, between a plurality of steel wires 40 located on the packaging removal part and extending from the first steel wire fixing part 20 to the first steel wire fixing part 30, that is, the Construction can be done by attaching carbon fibers 60 that are parallel to the plurality of strands 40 and extend from the first point to the third point. A more detailed description of carbon fiber construction will be provided later.

Step S8 is a packaging step, and mortar and asphalt concrete can be poured into the packaging removal area to repackage the area corresponding to the packaging removal area. Specifically, mortar and asphalt concrete are poured into the unpacking area where the first steel wire bending part (10), the first steel wire fixing part (30), the carbon fiber (60), and the steel wire (40) are installed, so that the corresponding elements are not exposed to the outside. You can avoid it.

The device of the present invention constructed through the above-described steps may have the form shown in FIGS. 3 and 4.

Specifically, the packaging removal portion can be formed by removing the packaging of a portion of the upper surface of the bridge structure across the cantilever portion (1) and the bridge body portion (2). Preferably, as shown in FIG. 4, when the packaging removal unit is viewed from above, one side of the packaging removal unit may be arranged in a direction perpendicular to the crossing axis, and another side may be arranged in the crossing axis direction.

In addition, one side of the pavement removal portion disposed in the bridging direction is located on the cantilever portion (1) side, and the other side of the pavement removal portion disposed in the bridging direction facing the side is located on the bridge main body portion (2). can be located That is, the pavement removal portion may correspond to an area where the pavement has been removed spanning the cantilever portion 1 and the bridge body portion 2.

A plurality of first steel wire bending parts 10 may be installed at predetermined intervals in the axial direction along one side of the cantilever part 1 of the packaging removal part. In addition, a plurality of first steel wire fixing parts 30 may be installed at predetermined intervals in the bridge axis direction along the other side of the bridge main part 2 of the pavement removal part.

Preferably, the first steel wire bending part 10 and the first steel wire fixing part 30 may be installed at positions corresponding to each other.

The first steel wire anchoring unit 20 may be installed on the lower surface of the cantilever unit 1.

In addition, a hole 50 can be formed through the cantilever portion 1 from the first point where the first steel wire bending part 10 is installed to the second point where the first steel wire fixing part 20 is installed. there is.

Preferably, the perforation 50 is formed by penetrating the cantilever portion 1 at a predetermined angle (more preferably an obtuse angle) from the first point, based on an imaginary line passing through the first point and the third point. You can.

As a result, as shown in FIG. 3, one end of the strand 40 is fixed to the first strand anchoring portion 20 at the second point, and penetrates the perforation 50 from the second point to the first point, It may be bent at the first steel wire bending part 10 at the first point, extend from the first point to the third point, and be fixed to the first steel wire fixing part 30 at the third point.

In addition, when the steel wire 40 bent and fixed to the first steel wire bending part 10, the first steel wire fixing part 20, and the first steel wire fixing part 30 is tensioned, the tension force of the steel wire 40 The structural stability of the bridge structure can be strengthened by this.

Specifically, when the steel wire 40 is tensioned, the cantilever part 1 is caused by the tension force (direction A in FIG. 4) acting between the first steel wire bending part 10 and the first steel wire fixing part 20. ), an upward force may occur. In other words, the strand 40 can reinforce the negative moment of the cantilever portion 1 by reducing the load on the cantilever portion 1.

Meanwhile, the strand 40 can be a general steel wire (strand) used in civil engineering or structures, or a coated steel wire manufactured so that the steel wire (strand) is protected with a lubricant and a thin outer shell.

Meanwhile, Figures 3 and 4 are images before the above-described packaging step is performed. In a preferred embodiment, mortar and asphalt concrete are poured into the packaging removal section, and the first steel strand bending section 10 installed in the packaging removal section is shown. The winding part (30), the steel wire (40), etc. may not be exposed to the outside.

Figure 5 shows the overall appearance of the first steel wire fixing part 20 installed on the lower surface of the cantilever part 1 according to an embodiment of the present invention.

As shown in FIG. 5, the first steel wire fixing part 20 includes a first surface 210 horizontal to the lower surface of the cantilever part 1; and a second surface 220, one end of which is in contact with one end of the first surface 210 and forming a predetermined angle with the first surface 210, and the first surface 210 and the second surface (220) is a triangular frame portion 21 having an overall triangular shape with one side open; and a triangular support portion 22 disposed in a space between the first surface 210 and the second surface 220 of the triangular frame portion 21.

As described above, the first steel wire fixing part 20 is installed on the lower surface of the cantilever part 1, and the steel wire 40 drawn out from the hole 50 penetrating the cantilever part 1 at a predetermined angle is fixed thereto. It can be. Specifically, the first steel wire fixing unit 20 may have a plurality of steel wires 40 drawn out from each of a plurality of perforations 50 formed at predetermined intervals in the axial direction on the lower surface of the cantilever part 1.

Meanwhile, as shown in Figure 5 (a), in one embodiment of the present invention, the first steel wire fixing part 20 is a single member and may be a single member extending in the bridging direction of the bridge structure. Specifically, one surface of the first steel wire fixing part 20 is in contact with a portion of the lower surface of the cantilever part 1 where the plurality of perforations 50 are formed, and the steel wire 40 drawn out from each of the plurality of perforations 50 is first. 1 It can be fixed to the steel wire fixing unit 20.

In this way, in one embodiment of the present invention, the plurality of strands 40 drawn out from the second point on the lower surface of the cantilever portion 1 can be fixed together in one member.

Meanwhile, as shown in (b) of FIG. 5, in another embodiment of the present invention, a plurality of first steel wire fixing parts 20 may be installed at predetermined intervals in the throttling direction of the bridge structure. Specifically, the first steel wire fixing part 20 is installed at a position corresponding to each of the plurality of perforations 50 formed on the lower surface (second point) of the cantilever part 1, and the first steel wire fixing part 20 is drawn out from each of the plurality of perforations 50. The strand 40 may be fixed to each of the plurality of first strand fixing parts 20.

That is, in another embodiment of the present invention, the first steel wire fixing portion 20 may be installed in the same number as the first steel wire bending portion 10 and the first steel wire fixing portion 30, respectively.

Figure 6 shows a detailed view of the first steel wire fixing unit 20 according to an embodiment of the present invention.

As shown in FIG. 6, the second surface 220 is perpendicular to an imaginary line formed by the strand 40 inserted into the perforation 50, and one end of the strand 40 drawn out at the second point Silver may penetrate the first surface 210 and be fixed on the second surface 220 .

Specifically, the first steel wire fixing part 20 may include a triangular frame part 21 that has an overall triangular shape. Specifically, the first surface 210 of the triangular frame unit 21 may be fixedly installed by directly contacting the lower surface of the cantilever unit 1. Preferably, the first surface 210 is connected to the lower surface of the cantilever unit 1 through one or more anchors 70 in a state in which the first surface 210 is in parallel contact with the lower surface of the cantilever unit 1. It can be attached and installed.

Meanwhile, the first surface 210 may further include a through hole through which the strand 40 can pass. Preferably, the first steel wire fixing part 20 may be installed so that the through hole of the first surface 210 is located at a position corresponding to each of the plurality of perforations 50 formed at the second point.

Meanwhile, one end of the second surface 220 of the triangular frame portion 21 is in contact with one end of the first surface 210, and may form a predetermined angle with the first surface 210. That is, the triangular frame portion 21 including the first side 210 and the second side 220 may have an overall triangular shape with one side open.

Meanwhile, the strand 40 passing through the through hole of the first surface 210 may be anchored at the second point.

That is, in a preferred embodiment of the present invention, the strand 40 may be fixed to the second surface 220 in a state perpendicular to the second surface 220. Specifically, the strand 40 inserted into the perforation 50 and drawn out at the second point may penetrate the through hole of the first surface 210 and one end may be anchored at the second point, and at this time, the strand 40 and The second surface 220 may be vertical (area indicated by a square dotted line in FIG. 6).

Meanwhile, the first steel wire fixing part 20 may further include a support part 22 disposed between the first surface 210 and the second surface 220 of the triangular frame part 21. Specifically, the support portion 22 has one side in contact with the first side 210, the other side in contact with the second side 220, and a triangular space between the first side 210 and the second side 220. It may be a support that physically supports the second surface 220 by filling it.

Preferably, the second surface 220 of the support portion 22 moves toward the first surface 210 due to compressive stress acting in the direction from the second point to the first point, so that the first surface 210 and the second surface It is possible to prevent (220) from coming into contact with or the angle of the strand 40 and the second surface 220, which are perpendicular to each other, from being distorted.

To summarize, the first surface 210 is a member for installing the first steel wire fixing part 20 on the lower surface of the cantilever part 1, and when the first steel wire fixing part 20 is installed, the first surface 210 ) is not parallel to the lower surface of the cantilever portion (1) or perpendicular to the strand (40).

Meanwhile, the second surface 220 is a member for fixing the strand 40 on the lower side of the cantilever part 1. When the first strand fixing part 20 is installed, the second surface 220 is the strand 40 ) can be perpendicular to That is, according to one embodiment of the present invention, the strand 40 is not anchored to the first surface 210, which is not perpendicular to the strand 40, or to the lower surface of the cantilever portion 1, but to a surface perpendicular to the strand 40. By fixing the strand 40 on the two sides 220, there is no need to bend the strand 40.

Additionally, in the present invention, by disposing the support part 22 in the space between the first surface 210 and the second surface 220, the second surface 220 can be supported more firmly.

On the other hand, in another embodiment of the present invention, when the first steel wire fixing part 20 is installed, the first surface 210 is parallel to the lower surface of the cantilever part 1 or is perpendicular to the steel wire 40, the first steel wire fixing part 20 is installed. The strand 40 can be anchored only on the surface 210. In addition, members such as U-beam steel, H-beam steel, and square steel pipe having a flat surface such as the first surface 210 can be used.

Figure 7 shows the first steel wire bending part 10 and the first steel wire fixing part 30 according to an embodiment of the present invention.

As shown in FIG. 7, the method of reinforcing the negative moment of the bridge structure includes a plurality of carbon fibers extending from the first point to the third point in a state in which the strand 40 is tensioned by the strand tensioning step. It further includes a carbon fiber construction step of attaching (60), wherein the carbon fiber (60) acts in the same direction as the tension force of the strand (40) acting between the third point and the second point. By the tensile force of the carbon fiber 60, the bonding force of the bonding surface between the bridge body portion 2 and the cantilever portion 1 between the second point and the third point can be strengthened.

As described above, in one embodiment of the present invention, the packaging removal portion corresponds to an area where the pavement of the upper surface of the bridge structure is removed across the cantilever portion (1) and the bridge body portion (2), and the cantilever portion of the packaging removal portion ( The first steel wire bending part 10 may be installed at the first point on side 1), and the first steel wire fixing part 30 may be installed at the third point on the bridge main part 2 side of the pavement removal part.

Meanwhile, when the steel wire 40 bent and fixed to the first steel wire bending part 10, the first steel wire fixing part 20, and the first steel wire fixing part 30 is tensioned, the first steel wire bending part 10 ), the cantilever The bonding force at the connection surface between the section 1 and the bridge body section 2 can be strengthened.

Meanwhile, in one embodiment of the present invention, it is disposed on the packaging removal part and may further include a plurality of carbon fibers 60 arranged in parallel with a plurality of strands 40 extending from the second point to the third point. . Specifically, as described above, a plurality of first steel wire bending parts 10 and first steel wire fixing parts 30 are installed on the packaging removal unit at preset intervals, and a pair of first steel wire bending parts 10 and a first steel wire fixing part 30 are installed on the packaging removal unit. A plurality of carbon fibers 60 may be disposed between each steel strand fixing portion 30.

Meanwhile, in one embodiment of the present invention, the carbon fiber 60 is a material with high tensile strength, and the carbon fiber 60 is oriented in the same direction in which the tension of the strand 40 acting between the third point and the first point acts. Resistance due to (60) may act.

In other words, the carbon fiber 60 may correspond to a member for additionally reinforcing the strand 40, which strengthens the bonding force of the joint surface between the cantilever portion 1 by pulling the first point and the third point.

In addition, as described above, mortar and asphalt concrete can be poured into the packaging removal part so that the carbon fibers 60 are not exposed to the outside.

Figure 8 shows a front view of a device for reinforcing the negative moment of a bridge structure according to another embodiment of the present invention.

As shown in FIG. 8, in the anchorage installation step, when the second steel wire bending portion 31 is installed at the third point, a hole is drilled in the vertical direction from the third point, and the vertical direction of the third point is It further includes a second steel wire fixing part installation step of installing the second steel wire fixing part 90 at the fourth point located on the lower side, wherein the steel wire installation step includes the second steel wire bending part 31 at the third point. ), one end of the strand 40 bent at can be extended to the second strand wire fixing part 90 at the fourth point and fixed to the second strand wire fixing part 90.

Meanwhile, in another embodiment of the present invention, the structural safety of the bridge structure can be further improved by installing the second steel wire fixing part 90. Specifically, the second steel wire bending part 31 (rather than the first steel wire fixing part 30) is installed at the third point, and the bridge body part (2) is installed from the third point where the second steel wire bending part 31 is installed. ) can be perforated 50 in the vertical direction to form a second perforation 80, and a second steel strand fixing part 90 can be installed at the fourth point corresponding to the lower side of the bridge main body 2.

That is, the second steel wire bending part 31 will be installed instead of the first steel wire fixing part 30 at the third point corresponding to the bridge main part (2) side of the pavement removal area where the first steel wire fixing part 30 is installed. You can.

As a result, as shown in FIG. 8, one end of the strand 40 is fixed to the first strand anchoring portion 20 at the second point, and penetrates the perforation 50 from the second point to the first point, It is bent at the first steel wire bending part 10 at the first point, extended from the first point to the third point, bent at the second steel wire bending part 31 at the third point, and again from the third point to the fourth point. It can be fixed to the second steel wire fixing part 90 at the fourth point by penetrating the second perforation 80 up to the point.

In this way, the second steel wire bending part 31 is installed at the third point, the second steel wire fixing part 90 is installed at the fourth point, and the second perforation 80 passing through the third and fourth points is formed. At this time, one end of the strand 40 is extended and fixed to the fourth point corresponding to the lower end of the bridge main body 2, rather than the third point on the packaging removal area, so that it can be fixed and installed more firmly.

Figure 9 shows a perspective view of a device for reinforcing the negative moment of a bridge structure according to another embodiment of the present invention.

As described above, a portion of the strand 40 disposed on the packaging removal part of FIG. 4 is disposed in a direction perpendicular to the bridge axis, and generates an upward force on the cantilever portion 1 protruding from the bridge main body 2 in the direction perpendicular to the bridge axis. You can reinforce the negative moment in the direction perpendicular to the bridge axis.

Meanwhile, in another embodiment of the present invention, the negative moment in the throttling direction can be reinforced by changing the orientation of the strand 40. Specifically, as shown in Figure 9, in another embodiment of the present invention, the strand 40 can be arranged in the throttling direction so that the tension of the strand 40 acts in the throttling direction.

Specifically, as shown in Figures 9 (a) and (b), in another embodiment of the present invention, when the packaging removal part is viewed from above, one side of the packaging removal part is in a direction perpendicular to the throttling axis, and the other side is in the direction perpendicular to the throttling axis. Can be placed in any direction.

At this time, a plurality of third steel wire fixing units 100 may be installed at predetermined intervals in a direction perpendicular to the bridge axis. Additionally, a plurality of fourth steel wire fixing units 110 may be installed at predetermined intervals in a direction perpendicular to the bridge axis at a point extending from the third steel wire fixing unit 100 in the bridge axis direction.

Preferably, a pair of third steel wire fixing units 100 and fourth steel wire fixing units 110 are located on the cantilever part 1 side, and a pair of third steel wire fixing units 100 and fourth steel wire fixing units 110 are located on the side of the cantilever part 1. The fixing unit 110 may be located on the bridge body unit 2 side.

As a result, when the strands 40 installed in the third steel wire fixing unit 100 and the fourth steel wire fixing unit 110 are tensioned, the compressive stress of the strand 40 may act in the throttling direction.

In addition, between the plurality of steel wires 40 installed in each pair of the third steel wire fixing part 100 and the fourth steel wire fixing part 110, a plurality of carbon fibers 60 are provided in parallel with the strands 40. can be placed. That is, the resistance of the carbon fiber 60 may also act in the throttling direction.

Meanwhile, in another embodiment of the present invention, the perforation 50 penetrating the cantilever part 1 at a predetermined angle and the first steel wire fixing part 20 installed on the lower surface of the cantilever part 1 are not included. You can.

In this way, when the strand 40 and the carbon fiber 60 are arranged in a form extending in the bridge axis direction, the cantilever portion 1 or the bridge main body protrudes in the bridge axis direction from the upper structure supported by the lower structure in the bridge. The negative moment occurring in the bridge structure due to the load in (2) can be partially offset, and as a result, the structural safety of the bridge structure can be strengthened.

Figure 10 shows a front view of a device for reinforcing negative moment of a bridge structure according to another embodiment of the present invention.

As shown in (a) of FIG. 10, in another embodiment of the present invention, the fourth steel wire fixing unit 110 and the third steel wire fixing unit 100 are spaced apart from the packaging removal unit in the transverse direction by a predetermined distance. It can be installed in a certain position, and the strands 40 installed in the third steel wire fixing part 100 and the fourth steel wire fixing part 110 can also be arranged in the transverse direction.

Meanwhile, as shown in Figure 10 (b), in another embodiment of the present invention, the structural safety of the bridge structure is further improved by installing the fifth steel wire anchorage unit 120 and the sixth steel wire anchorage unit 130. You can do it.

Specifically, in another embodiment of the present invention, a plurality of third steel wire bends 101 are installed at predetermined intervals in a direction perpendicular to the bridge axis, and a bridge axis perpendicular angle is formed at a point extending from the third steel wire bending unit 101 in the bridge axis direction. A plurality of fourth steel strand bending parts 111 may be installed at predetermined intervals in the direction.

That is, the third steel wire bending unit 101 is installed instead of the third steel wire fixing unit 100 at the point where the third steel wire fixing unit 100 is installed in FIG. 9, and the fourth steel wire bending unit 111 is installed at the fourth steel wire fixing unit 100. It may be installed instead of the fourth steel wire fixing unit 110 at the point where the strand fixing unit 110 is installed.

Meanwhile, from the point where the third steel wire bending part 101 is installed, the bridge body part 2 or the cantilever part 1 is perforated 50 in the vertical direction to form a hole 50 in the lower part of the bridge body part 2 or the cantilever part 1. The fifth steel wire anchoring unit 120 can be installed on the side.

Likewise, from the point where the fourth steel wire bending part 111 is installed, the bridge body part (2) or the cantilever part (1) is perforated (50) in the vertical direction to form a hole (50) in the bridge body part (2) or the cantilever part (1) The sixth steel strand fixing part 130 can be installed on the lower side.

As a result, as shown in (b) of FIG. 10, one end of the strand 40 is anchored to the fifth strand anchorage 120 installed on the lower side of the bridge main body 2 or the cantilever portion 1. , passes through the hole formed from the fifth steel wire fixing part 120 to the third steel wire bending part 101, and is bent at the third steel wire bending part 101 installed on the packaging removal part, and the third steel wire bending part ( It extends from 101) to the fourth steel strand bending part 111, and is bent at the 4th steel strand bending part 111 installed on the packaging removal part, and from the 4th steel strand bending part 111 to the 6th steel strand fixing part 130. It can penetrate the hole formed up to ) and be anchored to the sixth steel strand anchorage portion 130 installed on the lower side of the bridge body portion (2) or the cantilever portion (1).

As such, in another embodiment of the present invention, both ends of the strand 40 are not fixed on the packaging removal part, but are extended and anchored to the lower side of the bridge main body 2 or the cantilever part 1, so that the strand 40 ) can be installed more firmly.

As described above, although the embodiments have been described with limited examples and drawings, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent. Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the claims described below.

1: Cantilever part 2: Bridge main part
10: first steel wire bending part 20: first steel wire fixing part
21: triangular frame part 22: support part
210: Page 1 220: Page 2
30: First steel wire fixing part 31: Second steel wire bending part
40: strand 50: perforation
60: Carbon fiber 70: Anchor
80: Second perforation 90: Second steel wire fixing unit
100: 3rd steel strand fixing part 101: 3rd steel strand bending part
110: 4th steel strand fixing part 111: 4th steel strand bending part
120: 5th steel wire fixing part 130: 6th steel wire fixing part

Claims (6)

As a method of reinforcing the negative moment of a bridge structure including a bridge body portion and a cantilever portion,
A packaging removal step of forming a packaging removal portion by removing packaging from a portion of the upper surface of the bridge structure across the bridge body portion and the cantilever portion;
A drilling step of drilling a hole at a predetermined interval along the width direction of the packaging removal portion from a first point at one end of the packaging removal portion on the cantilever portion through the cantilever portion at a predetermined angle to a second point on the lower surface of the cantilever portion;
a plurality of first steel wire bending units for bending each of the plurality of steel wires drawn out from each of the plurality of perforations formed at the first point; A plurality of first steel wire fixing parts or a plurality of second steel wire bending parts for fixing each of the plurality of steel wires at a third point located at the other end of the packaging removal part extending from each of the plurality of first steel wire bending parts; And a first steel wire fixing part for fixing the steel wire pulled out from each of the plurality of perforations formed at the second point; a fixer installation step of installing a;
A strand installation step of installing a strand, a part of which is inserted into the hole and extending from the second point to the first point, and the other part extending from the first point to the third point on the packaging removal part;
A strand tensioning step of tensioning the strand and fixing the tensioned strand at the first strand anchoring portion at the second point; and
It includes a packaging step of pouring mortar and asphalt concrete into the packaging removal part to conceal the first steel wire bending part, and the first steel wire fixing part or the second steel wire bending part,
An upward force is generated in the cantilever portion by the tension of the strand acting between the third point and the second point, so that the negative moment is reinforced at the connection portion of the bridge body portion and the cantilever portion,
The first steel wire fixing unit,
a first surface horizontal to the lower surface of the cantilever unit; A triangular frame including a second surface, one end of which is in contact with one end of the first surface and forming a predetermined angle with the first surface, wherein the first surface and the second surface have an overall triangular shape with one side open. wealth; and
A method of reinforcing the negative moment of a bridge structure, comprising: a triangular support part disposed in a space between the first surface and the second surface of the triangular frame part.
In claim 1,
The method of reinforcing the negative moment of the bridge structure is,
In a state where the strand is tensioned by the strand tension step,
It further includes a carbon fiber construction step of attaching a plurality of carbon fibers extending from the first point to the third point,
The carbon fiber is,
By the tension force of the carbon fiber acting in the same direction as the tension force of the strand acting between the third point and the second point, the bridge body portion and the cantilever portion between the second point and the third point A method of reinforcing the negative moment of a bridge structure, reinforcing the bonding force of the joint surface between the two sides.
delete In claim 1,
The second surface is perpendicular to an imaginary line formed by a strand inserted into the perforation,
A method of reinforcing the negative moment of a bridge structure, wherein one end of the strand drawn out from the second point penetrates the first surface and is anchored to the second surface.
As a method of reinforcing the negative moment of a bridge structure including a bridge body portion and a cantilever portion,
A packaging removal step of forming a packaging removal portion by removing packaging from a portion of the upper surface of the bridge structure across the bridge body portion and the cantilever portion;
A drilling step of drilling a hole at a predetermined interval along the width direction of the packaging removal portion from a first point at one end of the packaging removal portion on the cantilever portion through the cantilever portion at a predetermined angle to a second point on the lower surface of the cantilever portion;
a plurality of first steel wire bending units for bending each of the plurality of steel wires drawn out from each of the plurality of perforations formed at the first point; A plurality of first steel wire fixing parts or a plurality of second steel wire bending parts for fixing each of the plurality of steel wires at a third point located at the other end of the packaging removal part extending from each of the plurality of first steel wire bending parts; And a first steel wire fixing part for fixing the steel wire pulled out from each of the plurality of perforations formed at the second point; a fixer installation step of installing a;
A strand installation step of installing a strand, a part of which is inserted into the hole and extending from the second point to the first point, and the other part extending from the first point to the third point on the packaging removal part;
A strand tensioning step of tensioning the strand and fixing the tensioned strand at the first strand anchoring portion at the second point; and
It includes a packaging step of pouring mortar and asphalt concrete into the packaging removal part to conceal the first steel wire bending part, and the first steel wire fixing part or the second steel wire bending part,
An upward force is generated in the cantilever portion by the tension of the strand acting between the third point and the second point, so that the negative moment is reinforced at the connection portion of the bridge body portion and the cantilever portion,
The anchorage installation step is,
When the second steel wire bending part is installed at the third point, a second steel wire fixing part is installed at the fourth point located vertically below the third point by drilling a hole in the vertical direction from the third point. Further including a steel wire fixing unit installation step,
The strand installation step is,
One end of the steel wire bent at the second steel wire bending part at the third point is extended to the second steel wire fixing part at the fourth point and fixed to the second steel wire fixing part, reinforcing the negative moment of the bridge structure. method.
A device for reinforcing the negative moment of a bridge structure including the bridge body portion and the cantilever portion,
Forming a packaging removal section by removing a portion of the upper surface of the bridge structure across the bridge body section and the cantilever section,
At predetermined intervals along the width direction of the packaging removal portion, drilling is performed from a first point at one end of the packaging removal portion on the cantilever portion through the cantilever portion at a predetermined angle to a second point on the lower surface of the cantilever portion,
a plurality of first steel wire bending units for bending each of the plurality of steel wires drawn out from each of the plurality of perforations formed at the first point; A plurality of first steel wire fixing parts or a plurality of second steel wire bending parts for fixing each of the plurality of steel wires at a third point located at the other end of the packaging removal part extending from each of the plurality of first steel wire bending parts; And a first steel wire fixing unit for fixing the steel wire pulled out from each of the plurality of perforations formed at the second point,
Installing a strand, one part of which is inserted into the perforation and extending from the second point to the first point, and the other part extending from the first point to the third point on the packaging removal part,
Tensioning the strand and fixing the tensioned strand at the first strand anchoring portion at the second point,
Mortar and asphalt concrete are poured and packed on the packaging removal part so that the first steel wire bending part, the first steel wire fixing part, or the second steel wire bending part is concealed,
An upward force is generated in the cantilever portion by the tension of the strand acting between the third point and the second point, so that the negative moment is reinforced at the connection portion of the bridge body portion and the cantilever portion,
The first steel wire fixing unit,
a first surface horizontal to the lower surface of the cantilever unit; A triangular frame including a second surface, one end of which is in contact with one end of the first surface and forming a predetermined angle with the first surface, wherein the first surface and the second surface have an overall triangular shape with one side open. wealth; and
A device for reinforcing the negative moment of a bridge structure, comprising: a triangular support part disposed in a space between the first surface and the second surface of the triangular frame part.

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