KR101883167B1 - bridge structure seismic reinforcement method using cable - Google Patents

Abstract

The present invention relates to a bridge structure seismic reinforcement method using a cable comprising a lower structure installing step, an abutment installing step, a pier installing step, an anchoring device installing step, a cable fixing and installing step, and an upper structure installing step. A cable for connecting an abutment or a pier with another abutment or another pier and a cable for connecting the pier with another abutment or another pier are mounted on an anchoring device in order to reduce displacement at upper portions of the abutment and the pier and prevent destruction of a bridge by reducing power to transfer instantaneous tensile strength under earthquake. Moreover, a spiral stiffener is combined to the pier to greatly enhance seismic performance without any bad influence on load carrying capacity of a pier foundation. Fiber is wrapped around the pier and a fiber reinforcement resin panel is mounted to enhance strength and durability by preventing cracks by vibration of the pier, neutralization due to various pollutions, erosion by a water current, and corrosion by damage from sea wind.

Description

Bridge structure seismic reinforcement method using cable]

The present invention relates to a seismic strengthening method for a bridge structure using a cable, and more particularly, to a seismic strengthening method using a cable, which comprises a substructure installation step, an alternate installation step, a bridge installation step, a fixing device installation step, a cable fixing installation step, The present invention relates to a bridge structure seismic reinforcement method using a cable for preventing breakage of a bridge by the force of momentary force transmission when an earthquake occurs.

In Korea, the earthquake has been regarded as a safe zone for many years. However, it has been argued that the earthquake in Gyeongju and Pohang recently experienced earthquakes and that there are many fault zones connecting to east and west. Seismic design for buildings and bridges over 6 stories is mandatory.

When a bridge receives a seismic load, vertical and horizontal loads due to the earthquake are added as well as vertical loads due to the dead loads and traffic loads of the bridge itself. In this case, a bridge without an earthquake-resistant design can not resist the horizontal load of the earthquake and it is destroyed. Particularly, bridge piers in bridges cause large damage due to collapse of upper structure due to fracture of bridge pier without seismic design with typical compression members.

Therefore, by coping effectively with external shocks and vibrations caused by earthquakes, it is possible to improve the seismic performance and to prevent the collapse of the upper structure by using epoxy or by enlarging the cross section of the bridge by using an anchor, And a method of using a method of increasing the bearing capacity. However, the method has been problematic in that it is sensitive to the external climate change, and it is difficult to achieve the original purpose due to the decrease of the adhesive strength of the resin over time.

In order to solve the above problems, various methods for preventing the destruction of the bridge structure and the bridge structure have been proposed, and the following techniques have been proposed.

The proposed technique is a device for preventing falloff using a wire rope (Korean Patent Registration No. 10-0788941 (Dec. 18, 2007)), in which a plurality of bridge columns are arranged in a horizontal direction The bridge girder is inserted through a lifting hole formed at one end of the bridge girder which is fixed to one side of the bridge pier, A first wire rope for wrapping around the outer circumferential surface of the other end of the coping portion and fixing the bridge pier and the bridge girder, and a second wire rope inserted through the piercing hole formed at the other end of the bridge girder, And a second wire for clamping the bridge pier and the bridge girder respectively while wrapping the outer circumferential surface of one side of the coping portion on the upper part of the pier intersecting with the first wire rope, It is installed on the rope and the edge of the coping of said pier top is to include an edge guide member for holding the fixed end and guide the first and second wire rope.

The above prior art can prevent falling of the bridge deck structure due to vibration and slip phenomenon during an earthquake or flood while maintaining the stability of the bridge piers. Even when the wire rope is expanded and contracted due to the temperature change and the flow of the bridge deck structure, Since the wire rope is not worn by the corner guide member which is provided at the corner of the portion and guides the wire rope, safety can be greatly improved even when used for a long period of time. However, since the wire rope is fixed to a plurality of girders, .

Apparatus for preventing falloff using wire rope (Korean Patent Registration No. 10-0788941 (December 18, 2007))

SUMMARY OF THE INVENTION The object of the present invention is to provide a bridge structure in which a cable connecting an alternating or piercing bridge to another alternating bridge or pier bridge to a fixing device and a cable provided between the alternating bridge bridge and another alternating bridge bridge bridge, And to provide a reinforcement method.

It is another object of the present invention to provide a bridge structure seismic strengthening method using a cable for binding a spiral reinforcement to alternate or piers.

Another aspect of the present invention is to provide a bridge structure seismic retrofitting method using a cable for wrapping fibers around an alternate or pier to be reinforced and installing a fiber reinforced resin panel.

In order to solve the above-mentioned problems and to achieve the object, the method of reinforcing a bridge structure using a cable according to an embodiment of the present invention includes a substructure installing step (S100) for installing a substructure on a ground to be installed;

An alternate installation step (S200) of installing an alternation (100) at both ends of the place where the lower structure is installed;

A pier installation step (S300) in which a plurality of bridge columns (200) are installed between the installed alternations (100);

A fixing device installing step (S400) of installing a plurality of fixing devices (300) on the upper surface of the installed alternation (100) or pierce (200);

A cable fixing installation step (S500) of fixing the cable (400) to the installed fixing device (300); And

And an upper structure installing step (600) for installing an upper structure on the upper part of the alternation (100) or the bridge pier (200)

The fixing device 300 is installed on the upper surface of the alternation 100 or the pier 200 in a " C " shape, and applies chemical liquid to fix the liquid.

When the cable 400 is fixedly installed between the fixing devices 300, the cable 400 is fixed to a tension that does not cause deflection.

The fusing device 300 includes a cable 400 connecting between alternate 100 or pier 200 and other alternation or pier and a connection between the alternate 100 or pier 200 and another alternate or pier The cable 400 is installed in a crossed manner.

The alternation 100 or pier 200 may be tapered to the base and chipped to alternate 100 or pier 200 surfaces to provide a plurality of piercing spirals The stiffener is vertically fixed and spaced at regular intervals from the top of alternating 100 or pier 200 base along alternation 100 or pier 200 and the plurality of vertical reinforcement spiral stiffeners A spiral stiffener for winding a spiral is wound and rolled up, a plurality of the spiral stiffeners for vertical positioning and the spiral stiffener for spiral winding are installed around the placement portion to which the spiral stiffener is laid, the concrete mortar is laid in the inside, Once the solidification of the concrete mortar is completed, the mold can be removed.

The alternative 100 or pier 200 is designed to wrap the reinforcing fibers closely to a desired thickness along the perimeter to be reinforced and to place the alternate 100 or pierced 200 outside of the wrapped reinforcing fibers. A pair of fiber reinforcing panels which can be coupled to the periphery are wrapped and fixed and the joint portions of the fiber reinforcing panels are sealed and then an epoxy resin for bonding is injected into the reinforcing fiber through the fiber reinforcing panel.

As described above, the present invention has the following effects.

(1) According to the present invention, there is provided a fixing device in which a cable connecting an alternating or piercing bridge to another alternating bridge or bridge bridge, and a cable connecting the alternating bridge bridge to another alternating bridge bridge bridge are provided, And it has the effect of preventing the destruction of the bridge by reducing the force of transmission of the tensional force momentarily when an earthquake occurs.

(2) The present invention has an effect that the seismic performance can be greatly improved without binding the spiral reinforcement to alternating or piercing and adversely affecting the bearing capacity.

(3) According to the present invention, fibers are wrapped around alternating piers or piers, and fiber reinforced resin panels are installed to prevent cracks due to vibration, to prevent neutralization due to various pollution, to prevent erosion by water currents, It has an effect of improving strength and durability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart of a bridge structure seismic strengthening method using a cable according to a preferred embodiment of the present invention.
FIG. 2 is a view showing a form of failure at the time of occurrence of an earthquake on the right side of the existing bridge.
3 is a view showing a form in which a tension structure is transmitted to the left when an earthquake occurs on the right side of a bridge structure according to a preferred embodiment of the present invention.
FIG. 4 is a view showing a type of failure when an existing bridge is seismically generated on the left side.
FIG. 5 is a view showing a form in which a tension is transmitted to the right when an earthquake occurs in a bridge structure according to a preferred embodiment of the present invention.
FIG. 6 is a view illustrating a configuration in which a fixing device and a cable are crossed over a bridge pier according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Since the terms described below are defined in consideration of the functions of the present invention, they may vary depending on the intention or custom of the user, the operator, and the definition thereof is " And should be based on the description throughout this specification.

FIG. 1 is a flow chart of a seismic retrofitting method of a bridge structure using a cable according to a preferred embodiment of the present invention, FIG. 2 is a view showing a type of breakage at the time of occurrence of an earthquake on the right side of a conventional bridge, FIG. 4 is a view showing a type of failure at the time of occurrence of an earthquake at the left side of the existing bridge, and FIG. 5 is a view showing a state of failure at the left side of the bridge according to an embodiment of the present invention. FIG. 6 is a cross-sectional view of a bridge structure according to a preferred embodiment of the present invention, in which a fixing device and a cable are crossed with each other. FIG. Fig.

1 to 6, the bridge structure seismic strengthening method using a cable according to the present invention includes a substructure installing step (S100) for installing a substructure on a ground to be installed;

An alternate installation step (S200) of installing an alternation (100) at both ends of the place where the lower structure is installed;

A pier installation step (S300) in which a plurality of bridge columns (200) are installed between the installed alternations (100);

A fixing device installing step (S400) of installing a plurality of fixing devices (300) on the upper surface of the installed alternation (100) or pierce (200);

A cable fixing installation step (S500) of fixing the cable (400) to the installed fixing device (300); And

And an upper structure installing step (600) for installing an upper structure on top of the alternation (100) or pier (200).

The fixing device 300 is installed in an upper part of the alternation 100 or the pier 200 so as to apply and fix the chemical liquid and to fix the alternation 100 or the pier 200 and other alternation or piercing And a cable 400 connecting the alternate 100 or pier 200 to another alternate bridge or pier are installed in an intersecting manner.

When the cable 400 is fixedly installed between the fixing devices 300, the fixing device 300 fixes the cable 400 to a tension that does not cause deflection. 200 and the fixing device 300. In addition,

The alternation 100 or pier 200 is formed with a foundation reinforcing pile 210 at the bottom and the base reinforcing pile 210 is injected into the ground hole and the chemical pouring solution is injected into the ground hole to fix.

 The above-mentioned constructions can prevent collapse when an earthquake collapses because the alternation 100 or pier 200 that can be collapsed due to the individual behavior is integrated by the cable 400 and the fixing device 300.

In addition, the alternation 100 or pier 200 may be tapered to the base and chiseled by alternate 100 or pier 200 surfaces to provide surface cleanliness, (100) or piers (200) and spiral stiffeners for the plurality of vertical stiffeners from a top surface of the alternating (100) or pierce (200) foundation in a spiral shape at regular intervals A plurality of spiral stiffeners for vertical positioning and a spiral stiffener for spiral winding are installed around the construction part to which the reinforced spiral stiffener is laid, and a concrete mortar is installed in the interior of the building, After completion of the solidification of the concrete mortar, the mold can be removed.

The reinforcing fiber may be used either alone or in combination of two or more selected from the group consisting of fiber roving cloth, glass fiber, Kevlar fiber, aramid fiber and carbon fiber. have.

In addition, the present invention can perform the following construction on the alternation 100 or the pier 200 considering the problems that may occur over time for the purpose of reinforcing the seismic performance.

The bridge pierces the reinforcing fibers in close contact with each other along the perimeter of the alternation 100 or bridge pier 200 to be reinforced, A pair of fiber reinforced panels that can be coupled to the periphery of the pier 200 may be wrapped and fixed, the joint portions of the fiber reinforced panels may be sealed, and epoxy resin for bonding may be injected into the reinforcing fiber through the fiber reinforced panel , Which has the advantage of improving strength and durability by preventing cracks due to vibration, preventing neutralization due to various pollution, preventing erosion by water flow and preventing corrosion by salt corrosion.

A structure for binding the spiral reinforcement to the alternating 100 or pier 200 and a structure for wrapping the fibers around the alternate 100 or the pier 200 to provide a fiber reinforced resin panel, The effect of the bridge is minimized when an earthquake occurs.

Bridge structure using cable according to the present invention The bridge structure by seismic strengthening method is mainly used in a river, a lake or a river, and is limited to a small bridge structure having a length of less than 50 m between alternation and alternation. However, the length is not limited to 50 m or less as described above, and the user may be used for large bridge structures of 50 m or more in some cases.

As described above, the bridge structure seismic strengthening method using a cable according to the present invention is characterized in that a cable 400 connecting the cable 400 to the fixing device 300 alternately or alternately with the pier 200, A cable 400 connecting between the alternation 100 or pier 200 and another alternation or pier may be provided to reduce the displacement of the alternations 100 and piers 200 and to reduce the momentum Thereby preventing the breakage of the bridge.

While the present invention has been described with reference to a limited number of embodiments and drawings, it is to be understood that the invention is not limited thereto and that various changes and modifications within the spirit and scope of the appended claims, Of course, it is possible to modify it.

S100: substructure installation step S200: alternate installation step
S300: Pier installation step S400: Fusing device installation step
S500: Cable fixing installation step S600: Upper structure installation step
100: Shift 200: Pier
210: basic reinforcement file 300: fixing device
400: Cable

Claims (5)

In a bridge structure seismic strengthening method using a cable,
The bridge structure seismic retrofitting method
A step of installing a substructure for installing a substructure on the ground to be installed;
An alternate installation step in which an alternate installation is provided at both ends of a place where the lower structure is installed;
A pier installation step in which a plurality of piers are installed between the installed shifts;
A fixing device installing step of installing a plurality of fixing devices on the upper surface of the alternate pier or pier;
A cable fixing step of fixing a cable to the installed fixing device; And
And an upper structure installing step of installing the upper structure on the alternate or pierced bridge,
The fixing device is installed in an alternating or "
The alternating or pierched beams may include a pair of fiber reinforcement panels alternately wrapped around the lapped reinforcing fibers or coupled around the piers, And the adhesive epoxy resin is injected into the reinforcing fiber through the fiber reinforcing panel after the joint portions of the fiber reinforcing panels are sealed,
Wherein the fixing device is constituted integrally with the alternating pier or bridge and the fixing device,
Wherein a cable having a predetermined length is formed when the cable is fixed to the fixing device. The method according to claim 1,
Wherein the cable is fixed at a tension that does not cause deflection when the cable is fixedly installed between the fixing devices. The method according to claim 1,
Wherein the fixing device comprises a cable connecting an alternating or piercing bridge to another alternating bridge or bridge bridge and a cable connecting the alternating bridge bridge to another alternating bridge bridge bridge or bridge bridge crossing bridge. Method. The method according to claim 1,
The alternating or piercing is carried out in a trench to the foundation and alternating or piercing the surface of the pier to clean the surface and a plurality of vertical reinforcement spiral stiffeners vertically fixed at regular intervals along the perimeter, A spiral stiffener for spirally winding a spiral stiffener along a plurality of spiral stiffeners for vertical placement at regular intervals from the upper surface of the alternate or pier foundation in a spiral manner and winding the spiral stiffener for a plurality of vertical stiffeners, Wherein the concrete mortar is installed in the interior of the space around the sparged reinforcing member and the concrete can be removed when the solidification of the concrete mortar is completed after a predetermined period of time. Reinforcement method. delete

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