KR100777807B1 - Bridge bearing and method for installation by using the same - Google Patents

Abstract

A bridge bearing and method for installation by using the same are provided to control the displacement derived from stress caused by an external shock load. A pair of support bars allowing a horizontal buffering part(200) to be coupled to two end portions of a vertical buffering part(130). The horizontal buffering part(200) includes a transfer bracket(230), a pair of tension bolts(214a), a support bracket(210), and an elastic member(220). The transfer bracket is coupled to the support bar. The tension bolts are couple to two sides of the transfer bracket. The support bracket is coupled to a lower plate while being spaced apart from two sides of the transfer bracket by a predetermined distance. The support bracket guides a transfer path of each tension bolt. The elastic member is interposed between the transfer bracket and the support bracket so that a predetermined elastic force is exerted on the transfer bracket.

Description

Bridge device and installation method {BRIDGE BEARING AND METHOD FOR INSTALLATION BY USING THE SAME}

1 is a simplified diagram showing a conventional bridge structure.

Figure 2 is a perspective view showing a teaching apparatus according to the present invention.

Figure 3 is a partial cross-sectional front view showing a teaching apparatus according to the present invention.

Figure 4 is a side view showing a teaching apparatus according to the present invention.

5 is an exploded perspective view showing a coupling state of the teaching apparatus according to the present invention.

Figure 6 is a flow chart showing the installation procedure of the chair apparatus according to the present invention.

7A to 7E are exemplary views sequentially showing the installation of the teaching apparatus according to the present invention.

Figure 8 is a simplified diagram showing the bridge structure when using the bridge apparatus according to the present invention.

** Description of the symbols for the main parts of the drawings **

10 bridge 12 superstructure

14: shift 16: pier

100: teaching device 110: the top plate

120: lower plate 130: vertical buffer

200: horizontal shock absorber 210: support bracket

220: elastic member 230: transfer bracket

The present invention relates to a bridge device, and more particularly to a bridge device capable of buffering the occurrence of the horizontal displacement occurring in the upper structure of the bridge and the impact load applied to the bridge pier at the same time.

In general, bridges consist of structures of various types and shapes depending on the type of facility to be supported and the purpose of use, and its role is to provide sufficient strength by safely maintaining the function of the bridges and facilities supported by the bridge. And must be durable.

As shown in FIG. 1, a plurality of bridges 16 are provided at predetermined distances between the two side shifts 14, and are continuously installed over each of the shifts 14 and the upper end of each bridge 16. Consisting of the upper structure 12 is provided, between the upper structure 12 and the bridge 16 is provided a bridge device (20a, 20b) to relax and transfer the deformation of the upper structure (12).

Unlike the building structure, the structure such as the bridge 10 is longer than the width, the length of the upper structure 12 due to seasonal temperature changes and crossover is severe. In particular, when the temperature change is large, such as in Korea, if the deformation limit of the bridge 16 cannot accommodate the temperature expansion of the bridge upper structure 12, the bridge structure (mainly the bridge 16 )) Can have serious adverse effects on structural characteristics.

Therefore, by placing horizontal displacement in accordance with the temperature change in the contact portion between the bridge upper structure 12 and the pier 16 to install the cushioning device (20a, 20b) on the top of the pier 16 so that the temperature stress does not work Done.

Here, the bridge device (20a, 20b) is a device that is installed so that the upper structure 12, which is the slab structure of the bridge is properly mounted on the bridge 16 for supporting it, the fixed end, one-way movable end according to its function It is divided into three types, such as two-way operation stage.

Such, the bridge device (20a, 20b) transfers the load of the bridge (10) to the bridge 10 substructure, such as bridge 16, the bridge 14, without difficulty, expansion and contraction by the temperature change of the bridge (10) It is important to ensure that the effects of deformation do not fall on the bridge 16, while the effects of deformation (eg, earthquakes) on the undercarriage of the bridge 10, such as the bridge 16, the bridge 14, are affected by the superstructure 12. It should be kept as short as possible.

Looking at the installation state of the conventional bridge device (20a, 20b), mainly in the center portion of the bridge 10 is installed a fixed stage bridge device (20a), the one-way movable end or two-way movable end in both directions based on the center portion The teaching device 20b of the system is continuously installed.

At this time, the horizontal deformation of the upper structure (12) generated by the change in temperature is the upper structure in the movable end bridge device (20b) installed in both directions relative to the fixed end bridge device (20a) installed in the center of the bridge (10) Corresponding to the deformation of (12) to properly distribute the deformation of the upper structure (12).

In addition, when an impact load such as an earthquake occurs, the one-way movable end or the two-way movable end type bridge device 20b has a very low resistance to the horizontal direction, and thus, the pier of the central part where the fixed end bridge device 20a is installed ( 16) Increase the scale so that the impact load caused by the earthquake is absorbed by the piers in the center, or when the earthquake occurs, a bridge device (not shown) with a separate shock absorber is added in order to act as a fixed end. To install.

However, in the case of the bridge apparatus 20a or 20b according to the related art as described above, the size of the bridge 16 located in the center of the bridge 10 becomes large for the installation of the fixed end bridge apparatus 20a. There is a problem that the construction cost of 10) is increased.

In addition, there is no self-correcting device (presetting device) for the horizontal displacement in the case of the bridge device to which the shock absorbing device is added according to the prior art, according to the temperature around the bridge 10 and the curing of concrete during the installation of the bridge device. If the horizontal deformation of the upper structure 12 is not considered due to the effect of drying shrinkage, there is a problem that the horizontal displacement of the upper structure 12 affects the piers.

The present invention has been made to solve the above problems, an object of the present invention is to provide a teaching device having a displacement control and a buffer structure against the stress caused by the external impact load.

In addition, the present invention has been made to solve the above problems, it is an object of the present invention to provide a teaching device having a correction structure for the displacement caused by the external temperature change during installation of the teaching device.

In addition, the present invention has been made to solve the above problems, and an object of the present invention is to provide a method for installing a teaching device having a displacement control, a buffer structure and a correction structure caused by external impact load and temperature change. .

The bridge device according to the present invention for achieving the above object, the upper plate is fixed to the upper structure of the bridge, the lower plate is fixed to the upper portion of the bridge, the vertical impact on the upper plate can be alleviated and horizontally movable relative to the lower plate In the teaching apparatus having a vertical buffer unit and a horizontal buffer unit for cushioning the horizontal shock generated by the horizontal movement of the vertical buffer unit, a pair of support that is coupled to each of the horizontal buffer unit on the outer both ends of the vertical buffer unit A bar is provided, and the horizontal shock absorbing portion is coupled to the support bar, a pair of tension bolts respectively coupled to both sides of the transfer bracket, and a predetermined distance from both sides of the transfer bracket are coupled to the lower plate and each A support bracket for guiding the tension path of the tension bolt, and between the transport bracket and the support bracket, respectively. It is provided with an elastic member that is interposed to exert a predetermined elastic force on the transfer bracket.

A guide slit for guiding the transfer of the vertical buffer portion is formed on the upper surface of the lower plate, and a guide protrusion is inserted into the guide slit under the vertical buffer portion.

The upper surface of the lower plate is further provided with a slide plate for reducing the friction with the vertical buffer.

The vertical shock absorber, a piston integrally formed in the lower portion of the upper plate, the piston is inserted and coupled, the contact is moved in contact with the lower plate, the cylinder on which the support bar is coupled to the conveying bracket is formed, the cylinder and the An elastic pad provided between the pistons to mitigate vertical impact, and a sealing member interposed between the outer circumferential surface of the piston and the inner circumferential surface of the cylinder to prevent foreign matter from entering.

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One end of the tension bolt is fixed by screwing the transfer bracket, and the other end is provided to penetrate the elastic member and the support bracket, and a temporary fixing nut for adjusting the position of the transfer bracket on the outer side with respect to the support bracket. Is combined.

Method for installing the bridge device according to the present invention for achieving the above object, in the method of installing the bridge device, the step of placing a bed block for fixing the bridge device to the end of the bridge, the bridge The seating device is seated on the bed block, and the anchoring socket of the seating device is inserted into the bed block to fix the seating device, taking into account the length deformation according to the temperature deviation of the upper structure and drying shrinkage due to curing. By adjusting the tightening of the temporary fixing nut screwed to both ends of the horizontal buffer portion, the distance between the transfer bracket and each support bracket located on both sides of the transfer bracket according to the length before deformation of the upper structure free Performing setting and fixing the set state, installing the superstructure to the upper portion of the chair apparatus. System, and a step of releasing the fixed state of the pre-set so that the pre-set state buffer applied to the horizontal portion in accordance with the deformation of the upper structure.

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The fixing of the presetting may include: removing the temporary fixing nut coupled to the tension bolt holding the transfer bracket with respect to the support bracket, thereby fixing the fixing force of the transfer bracket fixed by the tension bolt. Release it.

As the pre-setting of the horizontal shock absorber is released, the closer to the service temperature (or average temperature) of the bridge, the interval between the support brackets located on one side of the transfer bracket and the support brackets located on the other side of the transfer bracket The interval between them is equal, and acts the elastic force by the elastic member in both directions of the conveying direction of the conveying bracket.

The elastic member cushions horizontal vibrations transmitted between the piers and the upper structure.

Hereinafter, with reference to the accompanying drawings will be described in detail the method of installing the teaching apparatus and the teaching apparatus according to the present invention.

In the description of the present invention, the terms defined are defined in consideration of functions in the present invention, and should not be understood as meanings that limit the technical components of the present invention.

Figure 2 is a perspective view showing the teaching apparatus according to the invention, Figure 3 is a partial cross-sectional front view showing the teaching apparatus according to the invention, Figure 4 is a side view showing the teaching apparatus according to the invention, Figure 5 is a present invention Is an exploded perspective view showing the coupling state of the device according to the present invention.

First, in describing the present invention, the bridge 10 may be provided between the upper structure 12, the shifts 14 supporting both ends of the upper structure 12, and the shifts 14 of the upper structure 12. It is composed of a plurality of bridges 16 supporting the lower and each configuration is a known technique, so detailed description thereof will be omitted (see FIG. 8).

As shown, the teaching apparatus 100 according to the present invention has a vertical impact (or vibration) to the upper plate fixed to the upper structure, the lower plate 120 fixed to the upper portion of the pier 16, and the upper plate 110. At the same time, the vertical shock absorber 130 is provided to be movable horizontally with respect to the lower plate 120, and the vertical shock absorber 130 is fixed to the lower plate 120 to exert an elastic force against the movement of the vertical shock absorber 130. It is provided with a horizontal buffer unit 200 for buffering the horizontal shock (or vibration) transmitted to.

The upper plate 110 is fixed by welding or bolted to a sole-plate 116 fixed to the lower surface of the upper structure 12 of the bridge 10, a vertical buffer to be described later The piston 131 inserted into the 130 is formed to protrude, and the upper side of the outer peripheral surface is formed on the support bracket 210 of the horizontal shock absorber 200 to be described later, the horizontal guide groove 112 is formed to prevent separation. .

The lower plate 120 is to be seated and fixed to the bed block (16a) is placed on the upper end of the pier 16, the through-hole (217) is inserted into the fixing bolt 217 to be fixed to the anchor socket 17 on the outer peripheral surface ( 126 is formed, and an anchor socket 17 is inserted and fixed to the bed block 16a at the end of the fixing bolt 217, and extends in one direction at the center portion to guide the movement of the vertical buffer unit 130. Guide slit 122 is formed.

The guide slit 122 is inserted into the guide protrusion 135 of the vertical buffer unit 130, which will be described later, so that the vertical buffer unit 130 is limited to be movable only in one direction. Are installed in the same direction.

In addition, the upper surface of the lower plate 120 is further provided with a slide plate 124 for guiding the movement of the vertical buffer unit 130 seated on the lower plate 120 smoothly. The slide plate 124 is provided of a stainless material.

The vertical buffer unit 130 is provided between the upper plate 110 fixed to the upper structure 12 and the lower plate 120 fixed to the pier 16 to support the upper plate 110 with respect to the lower plate 120. do. The vertical shock absorbing part 130 has a piston groove 133a into which the piston 131 formed on the upper plate 110 is inserted, and a guide inserted into the guide slit 122 formed on the lower plate 120 at the lower side thereof. It is provided with the cylinder 133 in which the protrusion 135 was formed.

The inside of the cylinder 133 is provided with an elastic pad 134 made of natural rubber or synthetic rubber, and the vertical shock transmitted to the piston 131 by the elastic pad 134 is directly transmitted to the cylinder 133. Buffer it.

In addition, a sealing member (for example, an O-ring) is provided on the outer circumferential surface of the piston 131 and the inner circumferential surface of the cylinder 133 to prevent foreign substances such as dust from entering the space between the piston 131 and the cylinder 133. ) 132 may be interposed. In this case, a fixing groove (not shown) to which the sealing member 132 is fixed may be further formed on the outer circumferential surface of the piston 131.

On the other hand, a pair of support bars 136 are provided at both ends of the outer circumferential surface of the cylinder 133 to be coupled to the horizontal buffer unit 200 in a direction perpendicular to the direction in which the guide slits 122 are formed, and the support bars 136 are coupled to each other. The horizontal shock absorber 200 is prevented from being transmitted directly to the cylinder 133 in the horizontal direction.

In addition, a lower surface of the cylinder 133 is further provided with a PTFE (Poly Tetra Fluoro Ethylene) plate (not shown) in contact with the slide plate 124 provided on the lower plate 120 to reduce frictional resistance with the slide plate 124. The description of PTFE will be omitted since it is a known technique.

The horizontal shock absorber 200 is provided on both sides of the lower plate 120 in a direction parallel to the guide slit 122 to prevent the horizontal shock transmitted from the lower plate 120 is directly transmitted to the vertical buffer 130. It is to. Here, the horizontal shock absorber 200 is provided as a pair of symmetrical to each side of the chair 100, each description will be omitted.

The horizontal shock absorber 200 includes a pair of tension bolts 214a coupled to both sides of the transport bracket 230 and the transport bracket 230 to which the cylinder 133 of the vertical shock absorber 130 is coupled, The support bracket 210 is coupled to the lower plate 120 at predetermined intervals on both sides of the transfer bracket 230 and guides the transfer path of each tension bolt 214a, and the transfer bracket 230 and the support bracket 210 are separated from each other. It is provided with an elastic member 220 interposed therebetween to exert a predetermined elastic force on the transfer bracket 230.

Here, the transfer bracket 230 is formed in the center of the cylinder fixing groove 232 is inserted into the support bar 136 of the cylinder 133, both sides of the transfer bracket 230 in the direction of movement of the transfer bracket 230 A pair of tension bolt fixing grooves 234 are formed in which a pair of tension bolts 214a are fixed in a parallel direction (ie, a direction parallel to the guide slit 122 formed on the lower plate 120).

And each of the tension bolts (214a) is a thread formed on both ends, one end is fixed by screwing the tension bolt fixing groove 234 of the transfer bracket 230, the other end is the elastic member 220 and the support bracket 210 The temporary fixing nut 214b is coupled to each other. Here, the temporary fixing nut 214b is removed after the installation of the chair apparatus 100 is completed. The removal of the temporary fixing nut 214b will be described later in the operation description.

On the other hand, the tension bolt 214a may be provided in a plural number or a plurality of parallel to each side of the transfer bracket 230. In this case, when the plurality of tension bolts 214a are provided, it is possible to prevent distortion of the transfer bracket 230 when the transfer bracket 230 is moved.

And the support bracket 210 is provided to face each of both ends of the lower plate 120 to guide the transfer path of the tension bolt (214a). This, the support bracket 210 is the same as the 'L' shaped body and the fixing hole 216 for coupling to the through-hole 126 formed in the lower plate 120 is inserted into the fixing bolt 217 in the horizontal lower portion Is formed.

In addition, a pair of through-holes 212, which are coupled to the transfer bracket 230 and inserted into the pair of tension bolts 214a through the elastic member 220, are respectively inserted in the vertical upper end portion. In addition, a separate support protrusion 218 may be further provided inside the upper end of the support bracket 210 to limit the detachment of the top plate by mounting the horizontal guide groove 112 formed on the top plate.

On the other hand, the elastic member 220 is formed of a high elastic polyurethane material, the through hole 222 through which each tension bolt 214a is formed. The elastic member 220 may use a polyurethane material having a different elastic modulus according to the type of bridge 10, the deformation amount of the upper structure 12, etc. in which the bridge device 100 is installed.

Referring to the coupling state of the horizontal shock absorber 200 once again, the support bracket 210, the elastic member 220-the transfer bracket 230, the elastic member 220-the support bracket in the order of the transfer bracket 230 The elastic force applied to the transfer bracket 230 may be adjusted according to the tightening state of the temporary fixing nut 214b coupled to the tension bolt 214a and coupled to the outer end of the tension bolt 214a.

That is, by adjusting the tightening state of the temporary fixing nut 214b coupled to the tension bolt 214a of the horizontal shock absorber 200, the initial position of the transfer bracket 230 can be adjusted to temporarily adjust after installation of the upper structure 12. Removing the fixing nut 214b may correspond to the deformation of the upper structure 12, it is possible to adjust the elastic force applied to both sides of the transfer bracket 230, the vibration transmitted to the upper structure 12 through the bridge 16 (Or the vibration transmitted from the superstructure 12 to the pier 16) can exert a buffer force.

Accordingly, the installation method of the teaching apparatus 100 according to the present invention will be described in detail through the embodiment. Each element mentioned below should be understood with reference to the above description and drawings.

Figure 6 is a flow chart showing the installation procedure of the teaching apparatus according to the present invention, Figures 7a to 7e is an exemplary view showing the installation of the teaching apparatus according to the present invention in sequence, Figure 8 using the teaching apparatus according to the present invention This is a simplified diagram showing the structure of the bridge in case of.

First, in describing the installation of the teaching device 100 according to the present invention, each component part (for example, the upper plate 110, the lower plate 120, and the vertical buffering) in a separate production plant for the teaching device 100 according to the present invention. The unit 130 and the horizontal buffer unit 200 may be transferred to the installation site in an assembled state, and may be assembled and installed at the installation site. Therefore, the assembly process for the chair apparatus 100 will be omitted.

In addition, the bridge device 100 according to the present invention is to be interposed between the upper structure 12 and the bridge 16 of the bridge 10 can be installed a plurality of bridge device 100 in the conventional bridge (10). However, in the present invention, the installation of one chair apparatus 100 will be described as an example.

First, the bed block 16a for fixing the bridge device 100 to the upper end of the bridge 16 is constructed as shown in Figure 7a is poured. In this case, a separate sleeve 16b for inserting the anchor socket 17 coupled to the pedestal device 100 is inserted into the bed block 16a to be poured and fixed to the piers 16 according to the curing of the bed block 16a. (Step S110).

Thereafter, the seat device 100 is seated on the top of the bridge 16, and each anchor socket 17 of the bridge device is inserted into the sleeve 16b of the bed block 16a, and the non-shrinkage to the sleeve 16b. The pill 16c is poured to fix the teaching device 100 to the pier 16 (step S120).

At this time, the bridge device 100 is fixed to the bridge 16 is the initial state of the first assembled state is not a separate pre-setting. Thus, as shown in FIG. 7B, the apparatus may be configured in consideration of the length deformation according to the temperature deviation during the installation of the upper structure 12 of the bridge 10 and the drying shrinkage due to the curing of the upper structure 12. 100) is performed (step S 130).

Here, the presetting of the chair apparatus 100 may be performed by adjusting the tightening of the temporary fixing nut 214b screwed to both ends of the horizontal shock absorber 200. That is, in consideration of the deformation of the upper structure 12, the upper structure 12 by differently adjusting the distance (L, L ') between the transfer bracket 230 and each support bracket 210 located on both sides of the transfer bracket 230. ) To counteract variations. At this time, the distance between the transfer bracket 230 and each support bracket 210 is preferably formed to be always smaller than the elastic member 220.

Subsequently, when the installation and presetting of the bridge device 100 for the bridge 16 is completed as shown in FIG. 7C, the upper structure 12 of the bridge 10 is installed above the bridge device 100 ( Step S140). In this case, the upper structure 12 installed in the chair apparatus 100 is further provided with a sole plate 116 for connecting the chair apparatus 100 and the upper structure 12, the sole plate 116 and the chair apparatus The coupling of 100 can be joined by welding or bolts.

When the installation of the upper structure 12 of the bridge 10 is completed, as shown in FIG. 7D, the presetting of the chair apparatus 100 is released (step S150). That is, the temporary fixing nut 214b of the tension bolt 214a which fixes the conveying bracket 230 to the support bracket 210 is separated and the fixing force applied to the conveying bracket 230 by the tension bolt 214a is removed. Release it.

Accordingly, the horizontal shock absorbing unit 200 of the teaching device 100 has a gap L between the support brackets 210 positioned at one side of the transfer bracket 230 and a support bracket 210 positioned at the other side of the transfer bracket 230. The distance between the bridge (L ') is maintained at the initial preset interval, the closer to the actual use temperature (or average temperature) of the bridge 10, the upper structure 12 of the bridge 10 is deformed as the transfer bracket ( The distance L 'between the support bracket 210 positioned at one side of the 230 and the support bracket 210 positioned at the other side of the transfer bracket 230 are the same as illustrated in FIG. 7E. Is changed.

At this time, the interval L 'between the support bracket 210 positioned at one side of the transfer bracket 230 and the support bracket 210 positioned at the other side of the transfer bracket 230 are equal to each other. Accordingly, the elastic force by the elastic member 220 acts in both directions of the conveyance bracket 230.

Here, the elastic force of the elastic member 220 applied to the conveying bracket 230 is a vibration transmitted to the upper structure 12 through the pier 16 (or a vibration transmitted from the upper structure 12 to the pier 16). Demonstrates cushioning power.

In addition, by adjusting the tightening state of the temporary fixing nut 214b coupled to the tension bolt 214a of the horizontal shock absorber 200 at the time of initial installation of the bridge device 100, it is applied to the upper structure 12 or the pier 16. The elastic force (that is, the buffering force) applied to the transfer bracket 230 may be adjusted according to the magnitude of the vibration.

The bridge device 100 according to the present invention as described above is installed in a plurality of bridges 16 located in the center of the bridges 16 of the bridge 10 as shown in Figure 8 to the bridge 16 Exerts a buffering force to the vibration transmitted to the upper structure 12 (or the vibration transmitted from the upper structure 12 to the pier 16). At this time, the pier 16 located on the outer side of the upper structure 12 is provided with a one-way / two-way movable stage bridge device (not shown).

That is, the damping force to the vibration (or vibration transmitted from the upper structure 12 to the pier 16) transmitted to the upper structure 12 through the bridge 16 by the bridge device 100 of the present invention installed in the central portion. While supporting the upper structure 12 of the bridge (10).

Although described in detail with respect to preferred embodiments of the present invention as described above, those of ordinary skill in the art, without departing from the spirit and scope of the invention as defined in the appended claims Various modifications may be made to the invention. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

On the other hand, in the above-described teaching apparatus according to the present invention, the top plate, the bottom plate, the vertical buffer portion, it may be installed in reverse arrangement of the horizontal buffer portion. However, if the configuration as described above includes the essential configuration of the teaching device according to the present invention will not be able to escape the technical spirit of the present invention.

In addition, the above-mentioned bridge device according to the present invention does not mention the type of bridge is installed, but can be installed between the upper structure and the bridge of the bridge commonly referred to as the 'road bridge,' usually referred to as 'railroad bridge' It can be installed between the superstructure and the piers.

In addition, in the case of the 'railroad bridge', it is possible to control the horizontal displacement caused by the longitudinal load and the starting braking load of the pole rail installed in the upper structure of the 'railroad bridge'.

As described above, according to the installation method of the bridge device and the bridge device according to the present invention, by controlling the elastic force of the horizontal shock absorbing portion is possible to control the displacement of the impact load transmitted between the upper structure and the piers between the upper structure and the piers There is an effect that can buffer the shock transmitted to.

In addition, according to the installation method of the chair and the device according to the present invention, by adjusting the installation position of the transfer bracket of the horizontal shock absorbing unit so that the amount of elastic contraction of the elastic member occurs in accordance with the seasonal temperature change of the upper structure to the temperature change Accordingly, there is an effect that can buffer the external force applied to the piers by the upper structure.

Claims (11)

An upper plate fixed to the upper structure of the bridge, a lower plate fixed to the upper part of the bridge, a vertical buffer part provided to relieve vertical impact on the upper plate and to be movable horizontally with respect to the lower plate, and a horizontal movement of the vertical buffer part. In the teaching device having a horizontal shock absorber for cushioning the horizontal shock generated by A pair of support bars are provided at each of the outer ends of the vertical buffer unit to couple the horizontal buffer unit to each other. The horizontal shock absorbing portion is coupled to the support bracket, the pair of tension bolts respectively coupled to both sides of the transfer bracket, and the predetermined distance from both sides of the transfer bracket are coupled to the lower plate and the transfer of each of the tension bolts And a support bracket for guiding a path, and an elastic member interposed between the transfer bracket and the support bracket to exert a predetermined elastic force on the transfer bracket. The method of claim 1, A guide slit is formed on the upper surface of the lower plate for guiding the transfer of the vertical buffer portion, and a guide protrusion is inserted into the guide slit at the lower portion of the vertical buffer portion. The method of claim 2, The upper surface of the lower plate is a chair, characterized in that the slide plate is further provided for reducing the friction force with the vertical buffer. The method of claim 1, wherein the vertical buffer portion, A piston integrally formed in the lower portion of the upper plate, The cylinder is inserted and coupled, the cylinder is moved in contact with the lower plate, the support bar is coupled to the transfer bracket on both sides, An elastic pad provided between the cylinder and the piston to mitigate vertical impact; And a sealing member interposed between the outer circumferential surface of the piston and the inner circumferential surface of the cylinder to prevent foreign substances from entering. delete The method of claim 1, One end of the tension bolt is fixed by screwing the transfer bracket, and the other end is provided to penetrate the elastic member and the support bracket. A temporary fixing nut is coupled to the outer side with respect to the support bracket for adjusting the position of the transfer bracket. In the method of installing the chair apparatus of claim 1, Placing a bedblock for fixing the scaffolding device to an end of the piers; The seating device is seated on the bed block of the pier, and the anchor socket of the piercing device is inserted into the bed block to fix the seating device, In consideration of the length deformation according to the temperature deviation of the upper structure and the drying shrinkage according to the curing, the tightening of the temporary fixing nut screwed to both ends of the horizontal buffer portion, by adjusting the tightening of the transfer bracket and the transfer bracket Adjusting the interval between the respective support brackets according to the length before deformation of the upper structure to perform presetting and fixing the set state; Installing the upper structure to an upper portion of the teaching device; And releasing the fixed state of the presetting so that the presetting state of the horizontal buffer part is applied according to the deformation of the upper structure. delete The method of claim 7, wherein The step of releasing the presetting, The method of installing a chair apparatus, characterized in that for releasing the fixing force of the transfer bracket fixed by the tension bolt by separating the temporary fixing nut coupled to the tension bolt for fixing the transfer bracket to the support bracket. . The method of claim 9, As the pre-setting of the horizontal shock absorber is released, the closer to the service temperature (or average temperature) of the bridge, the interval between the support brackets located on one side of the transfer bracket and the support brackets located on the other side of the transfer bracket The spacing between the same, the method of installing the chair device, characterized in that the elastic force acts by the elastic member in both directions of the conveying direction of the conveying bracket. The method of claim 10, The elastic member, the installation method of the bridge device, characterized in that for cushioning the horizontal shock transmitted between the bridge and the upper structure.

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