KR101213715B1 - Expansion member and expansion joint having the same - Google Patents

Abstract

PURPOSE: An expansion member and an expansion joint with the same are provided to improve the durability of the expansion member because the expansion member contains a coupling stiffener and an expansion stiffener therein. CONSTITUTION: An expansion member(130) comprises joint portions(132), an expansion portion(134), coupling stiffeners(136), and expansion stiffeners(138). The joint portions are located at both ends of the expansion member and are coupled to end beams or middle beams. The expansion portion is connected to the joint portions and is expanded within a specific range. The coupling stiffeners are located inside the joint portions and reinforce the intensity and hardness of the joint portions. The expansion stiffeners are arranged inside the joint and expansion portions and comprise fiber bundles.

Description

Expansion member and expansion joint including the same {EXPANSION MEMBER AND EXPANSION JOINT HAVING THE SAME}

The present invention relates to an elastic member and an expansion joint device including the same, and more particularly to an expansion member that can be used in the bridge and an expansion joint including the same.

In general, in a relatively long bridge having a plurality of bridges, in order to cope with the expansion and contraction of the bridge according to the temperature change, the top plate of the bridge is divided into several parts in the longitudinal direction of the bridge, and the expansion joint between each divided top plate The device is installed.

The expansion joint is installed between the divided bridge top plate, the expansion and contraction in the direction of the bridge in accordance with the temperature change to accommodate the contraction and expansion of the bridge top plate, the direction perpendicular to the vertical axis and the vertical direction and the direction perpendicular to the bridge axis and the bridge axis It accommodates six degrees of freedom, such as vertical rotation.

In addition, the expansion joint may include an elastic member for preventing rain water from entering the lower structure. Such an elastic member serves as a drainage for flowing rain water and the like outwardly. As the soil, dirt, etc. introduced in the course of the rainwater flows, the load applied to the stretchable member increases, and thus, the stretchable member may be damaged or the coupling portion of the stretchable member may be detached. .

The present invention has been made to solve the above problems, and provides an elastic member which prevents the separation and reinforces the rigidity.

The present invention provides an expansion joint device including the expansion member.

Stretching member according to an embodiment of the present invention is provided between the top plate spaced apart from each other of the bridge, the elastic portion that can be stretched within a certain range in response to the behavior of the top plate, the coupling portion connected to both ends of the elastic portion, the coupling And a reinforcing reinforcement member disposed in the portion and extending in a direction perpendicular to the throttle, and the reinforcement portion and the reinforcement reinforcement member disposed in the engaging portion.

According to one embodiment, the coupling reinforcing member comprises a metal wire.

According to one embodiment, one end of the elastic reinforcing member is coupled directly to the coupling reinforcing member, the elastic reinforcing member may be wound at least once on the coupling reinforcing member.

According to an embodiment, the elastic reinforcing member may include a fiber bundle arranged in a predetermined direction, and the fiber bundle may include a tire cord branch.

According to one embodiment, the fiber bundles are arranged in the axial direction and in a direction perpendicular to the axial axis.

According to one embodiment, the fiber bundles are arranged in an oblique direction with respect to the direction of the axial direction and the axial direction.

According to one embodiment, the stretchable member further includes an inorganic flame retardant including at least one selected from the group consisting of metal hydroxides and boron compounds.

According to one embodiment, the stretching member further comprises a conductive filler including at least one selected from the group consisting of conductive channel black, conductive furnace black and acetylene black.

Stretch joint according to an embodiment of the present invention, is provided between the spaced apart top plate of the bridge, and includes a stretchable member, the stretchable member is stretchable within a certain range corresponding to the behavior of the top plate stretchable And a coupling part connected to both ends of the elastic part, a coupling reinforcement member disposed in the coupling part and extending in a direction perpendicular to the axial axis, and an elastic reinforcement member disposed in the elastic part and the coupling part.

According to one embodiment, the expansion joint device further includes an upper plate, a support for supporting the upper plate and an elastic member fixing portion protruding from the support to form a locking jaw, the engaging portion of the expansion member is the upper portion It is inserted into a space surrounded by the plate, the support and the elastic member fixing portion.

According to one embodiment, the expansion joint further comprises a non-contraction concrete portion and a finger plate disposed on the non-contraction concrete portion, the expansion member is disposed below the finger plate, and penetrates the expansion member Thus, it is coupled to the non-contraction concrete portion by a fixing member inserted into the non-contraction concrete portion.

According to an embodiment, the fixing member penetrates the elastic member reinforcing member, and the coupling part and the coupling reinforcing member are disposed on the fixing member.

The elastic member and the elastic joint apparatus including the same according to the present invention may include the elastic reinforcement member and the joint reinforcement member, and may not only improve durability of the elastic member, but also prevent detachment of the elastic member.

1 is a cross-sectional view of the expansion joint according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the expansion and contraction member of the expansion joint shown in FIG. 1.
FIG. 3 is a partial cutaway perspective view of the expansion member of the expansion joint shown in FIG.
Figure 4 is a cross-sectional view showing an elastic member according to another embodiment of the present invention.
5 is a partial cutaway perspective view showing an elastic member according to another embodiment of the present invention.
6 is a cross-sectional view showing the expansion joint according to another embodiment of the present invention.
FIG. 7 is an enlarged cross-sectional view of the expansion and contraction member of the expansion joint of FIG. 6.

Hereinafter, an elastic member and an expansion joint apparatus including the same according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

1 is a cross-sectional view of the expansion joint according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of the expansion member of the expansion joint shown in Figure 1, Figure 3 is a expansion joint shown in Figure 1 It is a partial cutaway perspective view of the elastic member.

Referring to Figure 1, the expansion joint is to respond to the six degrees of freedom motion including the expansion and contraction of the bridge according to the temperature change, the top plate divided into a plurality of to respond to the expansion and contraction of the bridge according to the temperature change It is provided between. The spacing of the upper plates may be increased and decreased within a predetermined range by external force and vibration applied to the bridge, and the expansion joint is capable of stretching in response to the change of the spacing. In detail, the expansion joint device includes end beams 110, intermediate beams 120, elastic members 130, support beams 140, a fixed box 150, a sliding box 160, and a guide box. 170).

The end beams 110 are formed in pairs and fixed to both ends of a divided bridge deck (not shown). That is, the end beams 110 are disposed to face each other at the end of the adjacent bridge deck.

The intermediate beams 120 are disposed between the end beams 110. The number of intermediate beams 120 may vary depending on the degree of expansion of the bridge deck. For example, when the degree of expansion of the bridge deck is small, the intermediate beam 120 may not be disposed or one or two intermediate beams 120 may be disposed. When the degree of expansion of the bridge deck is large, three or more intermediate beams 120 may be disposed. In this embodiment, the expansion joint includes three intermediate beams 120.

The support beam 140 is disposed below the intermediate beams 120 to cross the intermediate beams 120. The support beam 140 supports the intermediate beams 120. Thus, the support beam 140 prevents sagging of the intermediate beam 120 to facilitate vehicle traffic between the upper plates.

The fixed box 150 is fixed to one of the end beams 110, and the support beam 140 fixes the support beam 140 to allow six degrees of freedom.

The fixed box 150 includes a first rectangular frame 152, a first support member 154, and a second support member 157.

The first rectangular frame 152 has a form in which both sides are open, and is fixed to one lower portion of the end beams 110 and one end is configured to increase the angle so as to accommodate the transverse displacement even larger. Include.

The first support member 154 is fixed to the inner bottom surface of the first rectangular frame 152 and fixes the bottom surface of the support beam 140. The second support member 157 is fixed to the inner upper surface of the first rectangular frame 152, and fixes the upper surface of the support beam 140. The first support member 154 and the second support member 157 are compressed to the design displacement, and fatigue fatigue of the support beam 140 is accommodated while receiving the displacement by the impact load generated in the support beam 140. prevent. As the first support member 154 and the second support member 157 are compressed to the design displacement, the first support member 154 and the second support by excessive displacement, permanent creep, and low temperature shrinkage. The member 157 is not separated. The first support member 154 and the second support member 157 may be elastic bearings including steel sheets and elastic bodies that are alternately stacked.

The sliding box 160 is fixed to the lower side of the other one of the end beams 110, so as to enable six degrees of freedom movement including tilting and rotation (Torsional shear), sliding, etc. of the support beam 140 While supporting the support beam 140.

The sliding box 160 includes a second rectangular frame 162, a third support member 164, a fourth support member 167, and a housing 169.

The second rectangular frame 162 has a form in which both sides are open, and is fixed to the lower side of the other one of the end beams 110, and one end is configured to increase the angle to accommodate the transverse displacement even larger. It also includes.

The third support member 164 is fixed to the inner bottom surface of the second rectangular frame 162 to support the support beam 140, and the fourth support member 167 is the second rectangular frame 162. It is fixed to the inner upper surface of the support beam 140 to support. The third supporting member 164 and the fourth supporting member 167 may be elastic bearings including steel sheets and elastic bodies stacked alternately with each other, and further include a fluorine resin plate in contact with the supporting beam 140. Include.

The housing 169 is fixed to one side of the second rectangular frame 162 and provides a space for the support beam 140 to move horizontally. The housing 169 may have a shape that increases the angle of the other side in contact with the upper structure. For example, the housing may have a trapezoidal shape in a horizontal cross section. Thus, the housing 169 can easily accommodate the displacement (direction) perpendicular to the throttle during an earthquake.

The guide boxes 170 are fixed to the lower portions of the intermediate beams 120, respectively, and guide the sliding of the support beam 140 according to the expansion and contraction of the bridge.

The guide box 170 includes a frame 172, a fifth support member 174, and a polyacetal resin plate 176.

The frame 172 has a substantially U shape and is fixed to the lower portion of each intermediate beam 120. For example, the frame 172 may be fixed to the intermediate beam 120 by fastening screws or welding. In addition, one end of the frame 172 may be configured to increase the angle to accommodate the transverse displacement even larger.

The fifth supporting member 174 is fixed to the inner lower surface of the frame 172, and supports the lower surface of the supporting beam 140 to slide the supporting beam 140 with respect to the fifth supporting member 174. do. Since the configuration of the fifth support member 174 is substantially the same as the third support member 164 or the fourth support member 167, a detailed description thereof will be omitted.

The polyacetal resin plate 176 is disposed between the intermediate beam 120 and the support beam 140. The polyacetal resin plate 176 may be fixed to the bottom surface of the intermediate beam 120. The polyacetal resin plate 176 allows the support beam 140 to slide with respect to the intermediate beam 120.

Referring to FIG. 2, the intermediate beam 120 protrudes from an upper plate 121 directly contacting a vehicle or the like, a support 122 supporting the upper plate 121, and the support 122 to form a locking step. It includes an elastic member fixing part 124. The elastic member fixing part 124 protrudes in the horizontal direction from the side surface of the support part 122, the end is bent toward the upper plate 121.

2 and 3, the elastic member 130 includes a coupling part 132, an elastic part 134, a coupling reinforcement 136, and an elastic reinforcement 138.

The coupling part 132 is positioned at both ends of the elastic member 130, and is coupled to the end beam 110 or the intermediate beam 120. The stretchable portion 134 is connected to the coupling portion 132 and is substantially stretched. The coupling part 132 is inserted into a space surrounded by the elastic member fixing part 124, the support part 122, and the upper plate 121. The width of the coupling part 132 is larger than the gap between the end of the elastic member fixing part 124 and the upper plate 121. When a vertical load is applied to the elastic part 134, the coupling part 132 faces the space between the end of the elastic member fixing part 124 and the upper plate 121, that is, in the axial direction. Tensile force is applied. However, since the width of the coupling part 132 is larger than the distance between the end of the elastic member fixing part 124 and the upper plate 121, the coupling part 132 is the elastic member fixing part 124. It may not pass through the space between the end of the) and the upper plate 121, thereby preventing the elastic member 130 from being separated.

In order to install the stretchable member 130, the coupling portion 121 of the stretchable member 130 may have the stretchable member fixing portion 124, the support 122, and the upper plate in a direction perpendicular to the axial axis. It can be inserted into a space surrounded by 121).

 The coupling part 132 and the elastic part 134 may include an elastic material that is easy to stretch, for example, rubber, polyurethane, and the like.

Specifically, rubber (natural rubber, synthetic rubber), anti-aging agent (for example, 3C), polyacrylonitrile, octamine, softener (process oil), reinforcing agent (carbon black), filler (calcium carbonate), vulcanization aid (Stearic acid, magnesium oxide, zinc oxide), vulcanizing agents (NA-22, TT) and the like can be stirred to prepare a rubber mixed dough for producing the stretchable member 130.

The rubber mixed dough may further include a conductive filler for preventing dust adhesion. The conductive filler prevents the generation of static electricity to adsorb foreign substances. For example, conductive channel black, conductive furnace black, acetylene black and the like can be used as the conductive filler. These may be used alone or in combination.

The rubber mixed dough may further include an inorganic flame retardant for improving flame retardancy. The inorganic flame retardant may include a metal hydroxide, a boron compound, and the like, specifically, the metal hydroxide may include aluminum hydroxide, magnesium dihydroxide, calcium hydroxide, basic magnesium carbonate, hydrotalcite, huntite, hydromagnesite, and the like. have. These may be used alone or in combination.

The coupling reinforcing material 136 is located in the coupling part 132. Accordingly, the coupling reinforcing material 136 is disposed in a space surrounded by the elastic member fixing part 124, the support part 122, and the upper plate 121. The coupling reinforcing material 136 reinforces the strength and hardness of the coupling portion 132. For example, the coupling reinforcing member 136 may be a wire made of metal such as steel or SUS, and may have a shape extending in a predetermined direction, for example, a direction perpendicular to the throttle on a plane.

Since the coupling part 132 is made of an elastic material such as rubber, when the applied load is increased, the coupling part 132 may be excessively contracted, resulting in the detachment of the elastic member 130. By reinforcing the strength and hardness of the coupling portion, it is possible to prevent the separation of the elastic member 130.

The elastic reinforcing material 138 is provided in the coupling part 132 and the elastic part 134. The elastic reinforcement 138 may be a fiber bundle arranged in a predetermined direction, or a fiber bundle arranged to have a net shape. For example, in the present embodiment, the elastic reinforcement 138 may include a fiber bundle having a net shape arranged in the direction of the axial direction and the direction perpendicular to the axial direction.

The coupling part 132 and the elastic part 134 is coated with a rubber so as to have good adhesion. Each fiber bundle may be made of various fibers resistant to tensile strength such as rayon, nylon, and tire cord branches, and preferably, tire cord branches may be used.

The elastic reinforcing member 138 may improve durability of the elastic member 130 by serving to maintain its own shape within the elastic range of the elastic material, improve the support force by the tensile force, and reduce the fatigue due to bending. . In addition, it is also possible to improve the durability against various stretching and rotation caused by the six degrees of freedom of the upper plate movement. Therefore, damage to the stretchable member 130 may be prevented.

Meanwhile, since the elastic member 130 is disposed between the end beam 110 and the intermediate beam 120 and between the intermediate beams 120, rainwater is disposed between the end beam 110 and the intermediate beam 120. To prevent entry into the substructure through the gaps. Therefore, the lower structure can be prevented from being damaged by the rainwater.

Figure 4 is a cross-sectional view showing an elastic member according to another embodiment of the present invention. Referring to FIG. 4, the elastic member 230 includes a coupling part 232, an elastic part 234, a coupling reinforcement 236, and an elastic reinforcement 238. The stretchable member 230 is substantially the same as the stretchable member 130 illustrated in FIGS. 2 and 3 except that the stretchable reinforcement 238 is directly coupled to the coupling reinforcement 236.

Specifically, the elastic reinforcement 238 may be wound at least once on the coupling reinforcement 236. According to the present embodiment, the elastic reinforcing member 238 is coupled with the coupling reinforcing member 236, thereby more effectively improving the durability of the elastic member 230, and due to the difference in elasticity of the elastic reinforcing member 238 and rubber Separation from the stretchable portion 234 can be prevented.

5 is a partial cutaway perspective view showing an elastic member according to another embodiment of the present invention. Referring to FIG. 5, the elastic member 330 includes a coupling part 332, an elastic part 334, a coupling reinforcing material 336, and an elastic reinforcing material 338. The stretchable member 330 is substantially the same as the stretchable member 130 shown in FIGS. 2 and 3 except that the direction of orientation of the bundled fiber bundles in the bond reinforcement 336 is different.

Specifically, the fiber bundle of the elastic reinforcement 338 is arranged in a direction that is not parallel to the direction of the axial direction and perpendicular to the throttle, that is, in an oblique direction. The fiber bundles arranged as above may increase durability without inhibiting the stretching of the elastic reinforcement 338 as compared to the fiber bundles arranged in the axial direction.

The stretch reinforcement 338 of the stretchable member 330 shown in FIG. 5 is not coupled to the bond reinforcement 336, but in other embodiments, the stretch reinforcement 338 may be bonded to the stretch reinforcement 338, similar to that shown in FIG. 336 may be combined with each other.

6 is a cross-sectional view of the expansion joint according to another embodiment of the present invention, Figure 7 is an enlarged cross-sectional view of the expansion member 570 of the expansion joint of FIG.

6 and 7, the bridge includes an upper structure 512 spaced apart from each other, and the expansion joint is installed between the upper structures 512. The expansion joint shown in Fig. 1 is rail type, but the expansion joint is finger plate type.

Specifically, the expansion joint device includes a non-contraction concrete portion 522 seated on each upper structure 512, the non-contraction concrete portion 522 has a support plate 532 and a finger plate 542 Is placed. The support plate 532 is fixed to the non-contraction concrete portion 522 by a coupling member 562. The finger plate 542 is disposed and fixed on the support plate 532 and includes a plurality of fingers protruding in the axial direction toward the finger plate of the other, each finger is adjacent fingers of the other finger plate It is alternately arranged with each of the fingers of the finger plate of the other piece so as to be inserted therebetween.

An elastic member 570 is disposed below the finger plate 542. The elastic member 570 may be fixed to the non-contraction concrete portion 522 by the fixing member 572. In detail, the fixing member 572 may penetrate the elastic member 570 and be inserted into the non-contraction concrete portion 522 in the horizontal direction.

The elastic member 570 prevents rainwater from entering the lower structure through the finger plates 542. Thus, the lower structure can be prevented from being damaged by the rainwater.

The elastic member 570 includes a coupling part 577, an elastic part 578, a coupling reinforcement 575, and an elastic reinforcement 576.

The coupling part 577 is positioned at both ends of the elastic member 570, and is positioned above the fixing member 572. The stretchable portion 578 is connected to the coupling portion 577 and is substantially stretched. The coupling part 577 and the elastic part 578 may include an elastic material that is easily stretchable, for example, rubber or polyurethane.

The coupling reinforcement 575 is located in the coupling portion 577. Thus, the coupling reinforcing material 136 is located above the fixing member 572. The coupling reinforcement 575 may be a wire made of metal such as steel or SUS, and may have a shape extending in a predetermined direction, for example, a direction perpendicular to the throttle. Therefore, even if the engaging portion of the elastic member 570 is partially damaged, the coupling reinforcing material 575 is caught by the fixing member 572, the position of the coupling portion 577 can be fixed, as a result Separation of the elastic member 570 can be prevented.

The elastic reinforcement 576 serves to maintain its own shape within the elastic range of the elastic material, improve the support force by the tensile force, reduce the fatigue due to bending, and couple with the coupling reinforcement 575. Accordingly, the fixing member 572 penetrates the elastic reinforcing member 576 and is coupled to the non-contraction concrete portion 522.

Through such a configuration, it is possible to efficiently improve the durability of the elastic member 570 and to prevent the elastic member 570 from being separated.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

Stretch members and expansion joints according to the present invention can be used in construction, bridges, plants, offshore structures and the like.

10: lower support 20: upper support
30: fireproof member 32: side fixing member
34: lower fixing plate 36: upper fixing plate

Claims (17)

The expansion joint is provided between the spaced apart top plate of the bridge, the expansion member including an elastic member, an upper plate, a support for supporting the upper plate and an elastic member fixing portion protruding from the support to form a locking jaw, The absence,
An elastic unit capable of stretching within a predetermined range corresponding to the behavior of the upper plate;
Coupling parts connected to both ends of the elastic part;
A coupling reinforcement member disposed in the coupling portion and including a wire of a metal material extending in a direction perpendicular to the throttle; And
An elastic reinforcement member disposed in the elastic part and the coupling part,
The coupling portion of the elastic member is inserted into a space surrounded by the upper plate, the support portion and the elastic member fixing portion,
The elastic reinforcing member includes a fiber bundle arranged in a predetermined direction, the expansion joint device characterized in that wound at least once on the coupling reinforcing member. delete delete delete delete The expansion joint according to claim 1, wherein the fiber bundle comprises a tire cord branch. 2. The expansion joint according to claim 1, wherein the fiber bundles are arranged in the axial direction and in a direction perpendicular to the axial direction. The expansion joint according to Claim 1, wherein the fiber bundles are arranged in an oblique direction with respect to the axial direction and a direction perpendicular to the axial direction. The expansion joint according to claim 1, wherein the expansion member further comprises an inorganic flame retardant including at least one selected from the group consisting of metal hydroxides and boron compounds. The expansion joint according to claim 1, wherein the expansion member further comprises a conductive filler including at least one selected from the group consisting of a conductive channel black, a conductive furnace black, and an acetylene black.
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