KR20110126828A - Expansion joint to control distances among rails and energy released during earthquake motion - Google Patents

Abstract

PURPOSE: An expansion joint device having interval regulating part and a vibration absorbing part is provided to the stability and function of a bridge by efficiently reducing collision impact due to external impact or earthquake. CONSTITUTION: An expansion joint device having interval regulating part comprises multiple bottom rails(20), a guide bar(10), an upper rail(30), an X-link(40), a hinge shaft, a horizontal shock absorbing member(50), a perpendicular shock absorbing member(60), and a protection box. Multiple lower rails are horizontally arranged. The guide bar includes a guide hole, and a lower rail is fixed on. The guide hole is formed in order to guide the horizontal movement of each lower rail. An upper rail is integrally combined on the top of each lower rail. A hinge shaft supports the crossed connection part between each frame of X-link. The protection box is combined with each lower rail, locating in both side end point part and has the internal space for securing the drift space of the guide bar.

Description

EXPANDION JOINT TO CONTROL DISTANCES AMONG RAILS AND ENERGY RELEASED DURING EARTHQUAKE MOTION}

The present invention relates to an expansion joint device, and more particularly, to a rail-type expansion joint device having a vibration damping function by maintaining an equal distance between rails and controlling immediate behavior against impact and earthquake loads. .

In general, large-scale structures such as bridges and buildings are subject to deformation stresses caused by various factors such as temperature changes, creep and shrinkage, construction errors, loading loads, earthquakes and ground subsidence. If the stress is constrained without being released, there is a risk of cracking and damage to the structure. Therefore, when constructing a large structure, there is a gap between the gaps, which are spaced at regular intervals. Expansion joints are installed to smoothly accommodate the dynamic behavior of the structure while closing the joint gaps.

As an example, when a large structure is a bridge, the bridge is composed of a plurality of bridges at the bottom and a plurality of tops that are seated on the top of the bridges to form a road, and the tops and the tops are connected to both tops. The joint gap portion is provided with a suitable clearance width so as to accommodate the dynamic behavior of the smoothly.

In addition, by connecting and closing the joint gap in a horizontal direction, the vehicle traveling on the upper part can run smoothly, and rainwater or various foreign substances flow into and fall through the joint gap to contaminate and corrode the lower facilities of the bridge. In order to prevent the joint gap portion is to be installed elastic expansion joints.

Expansion joints should be able to exert an excellent performance as the most frequent failure and replacement factor in the overall structure of the structure, while directly affecting the safety and durability of the structure.

The performance required for expansion joints should basically provide complete and durable functions of expansion and sealing, as well as speedy construction and should reduce traffic control during repairs as much as possible.

Such expansion joints typically include rail type, finger type, and mono cell type, depending on their shape. Among them, the rail type has a relatively wide gap between the joint gaps, and thus the allowable amount of expansion and contraction. In the case where this should be large, for example, it is frequently used for large bridges and the like.

On the other hand, in the conventional rail-type expansion joint device is configured so that a plurality of rails are connected to each other to allow the flow of the gap has an advantage that can be effectively installed in the bridge with a large gap gap.

However, the conventional rail type expansion joint device has a problem that the impact load applied from the wheels of the passing vehicle is concentrated to a specific rail portion due to the non-uniform flow of a plurality of rails are reported as a major cause of destruction of the expansion joint.

The present invention has been proposed to improve the above problems in the prior art, the expansion joint between the structure that can be effectively attenuated such energy in the event of an external impact such as earthquake, as well as the interval between rails can be kept constant at all times. The purpose is to improve the safety and function of the bridge by providing a.

The present invention for achieving the above object, a plurality of lower rail sphere; A guide for forming a guide hole for guiding a horizontal movement of each of the lower rail balls, and having a lower rail ball positioned at one end thereof fixed thereto; An upper rail sphere integrally coupled to an upper portion of each lower rail sphere; An X link having a plurality of frames connected to each other in an intersecting form at a lower portion to maintain equal spacing of the lower rail holes; A hinge shaft rotatably supporting a connection portion intersecting each frame of the X-link; A horizontal shock absorbing member for connecting and supporting the hinge shafts in a horizontal direction; A vertical shock absorbing member for connecting and supporting the hinge shafts in a vertical direction; Characterized in that configuration comprising ;; the housing is coupled to both ends of the lower rail sphere.

The rail-type expansion joint device of the present invention has the effect of preventing the damage of the parts due to the concentration of load of the passing vehicle can be maintained constant evenly between each rail when the rail clearance gap change.

In particular, since each connecting portion of the X-link supporting the lower rail opening is stably supported by the shock absorber in the vertical and horizontal directions, it is possible to effectively cushion the shock caused by external vibration and earthquake.

1 is a perspective view of one side bottom portion of the lower joint of the expansion joint according to an embodiment of the present invention.
Figure 2 is another side upper perspective view of the expansion joint lower drive unit of an embodiment of the present invention.
Figure 3 is a completed side structural view of the expansion joint device of the present invention.
Figure 4 as showing the construction state of the expansion joint device of the present invention,
4a is a state diagram at minimum flow.
4b is a normal state diagram.
4c is a state diagram at the maximum flow time.
Figure 5 is a side structural view of the expansion joint according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, looking at the structure of the rail-type expansion joint according to an embodiment of the present invention through Figures 1 to 4, a plurality of lower rail holes 20 arranged horizontally in the lower portion of the device is connected to the X link 40 And the equal intervals are maintained, X-link 40 has a hinge shaft 41 is projected to the connecting portion between each frame, of which the lower rail opening 20 is connected by the hinge shaft 41 of the upper end It is structured.

In addition, each hinge shaft 41 is connected to the horizontal shock absorbing member 50 and the vertical shock absorbing member 60 horizontally and vertically, thereby enhancing the vibration suppression function to cushion the vibration and shock acting from the outside. It was.

The shock absorbing member 60 is preferably configured as a shock absorber (Shock absorber). Such a shock absorber is able to withstand a sudden dynamic behavior compared to a general spring or rubber, and can effectively respond to a sudden external shock such as a vehicle crash or earthquake.

In addition, the upper rail holes 30 are individually fixed to the upper portion of each of the lower rail holes 20, both sides of the protective housing 70 to form a predetermined interior space is located, both sides of the protective housing 70 is coupled to the lower rail opening 20 located at both ends.

In particular, one end of the guide stand 10 is fixed to the lower rail opening 20 to form a fixed end, and the other end forms a free end, so that one side of the protective housing 70 secures a flow space of the guide stand 10. It has a relatively long length for.

In the figure, reference numeral 31 denotes a buried sphere which is embedded in the concrete mortar (2).

With reference to Figure 4 will be described the effect of the construction of the present invention expansion joint device forming a structure as described above.

The expansion joint of the present invention is fixed installation is made by curing the mortar (2) after installing the middle of both sides by blocking out the connection between the concrete upper slab (1) of the bridge.

At this time, both the protective housing 70 and the rail holes (20, 30) located at both ends of the protective housing 70 and the two ends are made to form the buried fixed integrally to the concrete mortar (2).

The rail-type expansion joint device is installed in this way is usually maintained as a constant distance between the rails as shown in Figure 3b to form a form supporting the joint portion of the bridge slab.

On the other hand, when the deformation of the structure occurs due to the external temperature change and the physical force acts, the dynamic behavior of the upper slab (1) occurs, as shown in Figure 3a or the gap of the gap is reduced or as shown in Figure 3c The clearance gap is increased, but the gap between the rails can be kept constant.

That is, when such dynamic behavior occurs, the interval between the lower rail holes 20 is maintained at equal intervals by the bellows-shaped X-link 40 supported at the bottom, and the flow of each lower rail hole 20 is maintained. It can be seen that the stable guide flow in the horizontal direction is made along the guide hole 11 formed in the guide (10).

In addition, the shock absorber shock absorbing members 50 and 60 installed on the hinge shafts 41 at each connection portion absorb vibrations in the horizontal and vertical directions, thereby minimizing the impact force of the bridge.

Therefore, the expansion joint device of the present invention can be maintained at equal intervals while the expansion amount is applied to each rail at a constant value, so that the load of the passing vehicle is uniformly acting as a whole, resulting in parts damage and deformation. This can be prevented.

On the other hand, Figure 5 shows the structure of the expansion joint according to another embodiment of the present invention.

That is, as shown, one side of the guide hole 11 of the guide hole 10 is provided with a built-in elastic spring 80, one end of the elastic spring 80 and the lower rail opening 20 located at the most end and The connection is configured, the urethane coating layer 21 for buffering and oxidation prevention is formed on the side wall surface of the lower rail opening 20.

This configuration prevents the end from sagging because the end of the guide stand 10 forming the free end is supported by the elastic support force of the elastic spring 80, and also when the contact between the lower rail holes 20 occurs In addition to preventing damage, corrosion of the contact surface can be obtained.

Therefore, the structure of the rail according to the embodiment can be stably supported while reducing maintenance costs.

In addition, although specific embodiments of the present invention have been described and illustrated above, it will be apparent that the rail type expansion joint structure of the present invention may be variously modified and implemented by those skilled in the art.

However, such modified embodiments should not be understood individually from the spirit or scope of the present invention, such modified embodiments will be included within the appended claims of the present invention.

10: guide stand 11: guideman
20: lower rail opening 21: urethane coating layer
30: upper rail opening 40: X link
41: hinge axis 50: horizontal shock absorbing member
60: vertical shock absorbing member 70: protective enclosure
80: elastic spring

Claims (5)

A plurality of lower rail holes 20 arranged horizontally;
A guide hole (10) formed to guide the horizontal movement of each of the lower rail holes (20), the lower rail holes (20) being positioned at one end thereof being fixed;
An upper rail tool 30 integrally coupled to an upper portion of each of the lower rail tools 20;
An X-link 40 having a plurality of frames connected to each other in an intersecting form at a lower portion to maintain equal intervals of the lower rail holes 20;
A hinge shaft (41) rotatably supporting a connecting portion intersecting between the frames of the X-link (40);
A horizontal shock absorbing member (50) for connecting and supporting the hinge shafts (41) in a horizontal direction;
A vertical shock absorbing member (60) for connecting and supporting the hinge shafts (41) in the vertical direction;
A protective housing (70) coupled to each of the lower rail holes (20) positioned at both ends of the lower rail holes (20) and forming an inner space for securing a flow space of the guide stand (10);
Expansion joint device having an equal distance between rails and a vibration damping function characterized in that the configuration comprising a. The method according to claim 1,
The horizontal shock absorbing member 50 is an expansion joint device having an equal interval control and vibration damping function between the rails, characterized in that consisting of a shock absorber (Shock absorber) for mitigating vibration. The method according to claim 1,
In the guide hole 11 formed in the guide 10, a hinge shaft 41 is formed in which a connection between the other lower rail holes 20 and the X link 40 except for the lower rail holes 20 located at one end is inserted. Expansion joint device having an equal interval control and vibration damping function between the rail is mounted. The method according to claim 3,
One side of the guide hole 11 is provided with a built-in elastic spring 80, one end of the elastic spring 80 is connected to the lower rail hole 20 located at the most end, the interval between the rails, characterized in that configured And expansion joint device having a damping function. The method according to claim 1,
Side wall surface of the lower rail sphere 20, the urethane coating layer 21 for cushioning and preventing oxidation is formed, the expansion joint having a function of equal intervals between the rails and vibration damping.

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