KR101216177B1 - Elastomeric bearing pad assembly and construction method for the same - Google Patents

Abstract

PURPOSE: An elastic bearing assembly for a bridge and a construction method thereof are provided to easily install and replace a pad portion and to reduce the maintenance costs of the pad. CONSTITUTION: An elastic bearing assembly for a bridge comprises an upper plate(10), a lower plate(20), a pad portion(30), a first auxiliary plate(40), and support anchors(50). The upper plate is fixed to the bottom surface of the upper structure of a bridge and has a cut portion and multiple first fastening holes. The lower plate is fixed to the top surface of the lower structure of the bridge. The pad portion comprises a rubber pad and multiple metal plates. The metal plates are arranged inside the rubber pad at uniform intervals and are installed between the upper and lower plates. The first auxiliary plate is installed on the bottom of the upper plate and has multiple second fastening holes corresponding to the first fastening holes and multiple third fastening holes coupled to the pad portion. The support anchors are installed on the bottom of the lower plate and are inserted into the top surface of the lower structure of the bridge.

Description

Elastomeric bearing assembly for bridge and construction method {ELASTOMERIC BEARING PAD ASSEMBLY AND CONSTRUCTION METHOD FOR THE SAME}

The present invention relates to an elastic bearing assembly for a bridge and a construction method thereof, and more particularly, when the elastic bearing is old and needs replacement, the replacement and maintenance is easy, and when the elastic bearing is installed on a pillar of a bridge. An elastic support assembly for bridges and an installation method thereof are easily installed.

In general, since the vehicle travels at a high speed on the bridge with the upper plate on the bridge, the load changes every moment on the bridge, and thermal deformation according to the season changes in the large bridge with the relatively long length of the upper plate. Due to the increase in the amount of expansion of the upper plate, it must be able to accommodate the relative movement at the contact portion of the upper plate and the bridge, and must have a support structure that can cushion the impact on the bridge horizontally, such as earthquakes or vibrations.

To this end, an elastic support using a rubber pad is installed, as a conventional elastic support for bridges, Korean Patent No. 319957, as shown in Figure 1, the upper plate fixed to the upper structure of the bridge, the pillar of the bridge It consists of a rubber pad provided between the lower plate and the upper plate, the lower plate is fixed to the lower structure, the rubber pad is disclosed an elastic support having a structure in which a plurality of steel plates and rubber are sequentially stacked.

However, the elastic bearing disclosed in the prior art has a problem that it is difficult to replace the rubber pad and the upper and lower plates when the rubber pad is aged or damaged over time.

In addition, in the construction of the elastic bearing according to the prior art, in order to install the elastic bearing on the pillar of the piers, the sleeve is embedded in the piers before the concrete pouring of the piers and the top is closed with adhesive tape to prevent the concrete from entering the sleeve. After pier concrete is poured and the pier concrete hardens, the sleeve is removed and an elastic bearing support anchor is installed there.

However, in the construction of the elastic support according to the prior art described above, it is difficult to remove the sleeve having a long length of 50 cm or more after concrete hardening, so that defects easily occur during installation of the support anchor of the elastic support, and construction cost and effort are high. There was a problem.

The present invention is to solve the above problems of the prior art, an object of the present invention is to provide an elastic support assembly that is easy to install and easy to replace and maintain when the elastic support is old and needs replacement. It is.

Another object of the present invention is to provide an elastic bearing assembly capable of lowering the height of the elastic bearing while maintaining the effective thickness of the elastic bearing.

In addition, another object of the present invention is to provide a method for constructing an elastic support assembly that is easy to embed and remove the sleeve for the installation of the elastic support support anchor when installing the elastic support in the piers.

In order to achieve the above object, the elastic support assembly according to the present invention is fixed to the bottom of the upper structure of the bridge, and the upper plate having a plurality of first fastening holes in the incision and the edge cut in concave on the bottom, A lower plate fixed to an upper surface of the lower structure of the bridge, a rubber pad formed of a rubber material having elasticity, and a plurality of rubber plates installed in the rubber pad and spaced apart from each other by a predetermined distance and installed between the upper plate and the lower plate. A pad portion having a metal plate, a plurality of second fastening holes inserted into the cutout portion of the upper plate and having a plurality of second fastening holes corresponding to the first fastening holes at the edges, and a plurality of third fastening holes formed to be fastened to the pad portion; The first auxiliary plate is fastened to the pad portion and the other side is fastened to the upper plate, one side is the lower Is fixed to the lower surface of the other side plate is characterized in that a support anchor that is inserted into the upper surface of the lower structure the bridge.

Here, it is provided on the outside of the pad portion and is fixed to the upper plate or the lower plate is characterized in that it further comprises a projection for preventing and protecting the separation of the pad portion.

Here, the lower plate is further provided with a plurality of lower plate fastening holes in the second incision and the rim concave in the upper surface, is inserted into the second incision of the upper plate and corresponds to the lower plate fastening hole in the rim A plurality of second lower plate fastening holes and a plurality of fourth fastening holes are formed to be fastened to the pad portion, one side is fastened to the pad portion and the other side is provided with a second auxiliary plate fastened to the lower plate do.

Here, a third cut portion concavely cut is formed on a bottom surface of the first auxiliary plate, and a fourth cut portion concavely cut is formed on an upper surface of the lower plate, and the pad portion is the third cut portion and the fourth cut portion. It is characterized in that the insert is installed in the incision.

Here, a screw thread is formed on the inner surface of the lower end of the support anchor, and is further provided with a height adjuster for adjusting the distance between the lower plate and the upper surface of the lower structure of the bridge by screwing to the support anchor. .

Here, it further comprises a sleeve form embedded in the substructure of the bridge to be removed after the concrete hardening of the bridge, the sleeve form is an inner foam formed in a hollow cylindrical shape, the inner foam surrounds the inner surface of the wavy shape It characterized in that it comprises an external foam having a corrugated surface formed.

In addition, the construction method of the elastic bearing assembly according to the present invention, the inner form formed in the hollow cylindrical shape when the reinforcement of the lower structure of the bridge, and the outer form surrounding the inner form and the wavy surface formed in the wavy surface on the inner surface Embedding a sleeve foam having a; and placing and hardening concrete in the substructure of the bridge, and then removing the inner foam and then pressing the outer foam inward toward the corrugated surface to remove the outer foam. Removing the foam from the undercarriage of the bridge, installing a support anchor in the space formed by the sleeve foam, installing a lower plate on top of the support anchor, and a rubber pad on the lower plate. Fastening a pad part having a plurality of metal plates, and installing a first auxiliary plate on the pad part. After inserting the first auxiliary plate to the incision formed in the series, and a bottom surface, through the fastening hole formed in the rim it characterized in that it comprises the step of fastening the top plate to the top of the first auxiliary plate.

According to the elastic bearing assembly according to the present invention having the above-described configuration, the auxiliary plate is provided between the upper plate and the pad portion without being directly installed on the upper plate fixed to the upper structure of the pier by welding or the like, and the auxiliary plate is mounted on the auxiliary plate. The upper plate and the auxiliary plate are attached to the side when the pad part needs to be replaced by aging or damage by fastening the pad part and joining the upper plate and the auxiliary plate by screws or bolts at the side edges. After disengaging the screw or bolt, the pad part can be easily removed from the auxiliary plate, so that it is easy to install, replace or maintain, and reduce the cost and time required for replacement or maintenance.

In addition, by forming the cutout portion in the auxiliary plate or the lower plate and inserting the pad portion into the cutout portion, the pad portion can be accurately maintained so that the pad portion can be easily installed and the pad portion can be stably prevented from being released from the position.

In addition, according to the construction method of the elastic support assembly of the present invention, by applying the inner foam formed in the hollow cylindrical shape and the outer foam formed with a wavy wave shape on the inner surface, the outer foam after the concrete hardening of the pier substructure to the corrugated surface side Since the sleeve foam can be easily removed from the pier undercarriage, even if the support anchor is long, the corresponding sleeve foam can be easily buried and removed, thereby simplifying the construction and reducing the cost and time required for construction. .

1 is a view showing an elastic bearing according to the prior art.
2 is a partially cutaway perspective view of the elastic bearing assembly according to the present invention.
3A to 3C are a plan view, a sectional view, and a separated sectional view of FIG. 2, respectively.
4 is a detailed view of portion A of FIG. 3.
5 is a view showing another example of the elastic bearing assembly according to the present invention.
6a and 6b are views showing another example of the elastic bearing assembly according to the present invention.
7 is a view showing a sleeve form of the elastic bearing assembly according to the present invention.
8 is a flowchart illustrating a construction method of the elastic bearing assembly according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the elastic support assembly and its construction method according to the present invention.

≪ Example 1 >

2 to 4 and 7 are views showing an embodiment of the present invention.

As shown in FIGS. 2 to 4 and 7, the elastic support assembly 1 according to the present invention includes an upper plate 10, a lower plate 20, a pad part 30, and a first auxiliary plate ( 40 and the support anchor 50 is configured.

The upper plate 10 is fixed to the upper structure of the bridge, for example, a slab steel frame of the bridge by welding or the like method. In the present embodiment, the upper plate is formed to have a substantially square shape and a certain thickness. A plurality of first fastening holes 11 are provided at the side edges of the upper plate 10 at regular intervals. Fastening means such as bolts or screws are inserted into the first fastening holes.

In addition, the bottom surface of the upper plate 10 is cut away from the bottom to the upper side at a position spaced a predetermined length from the end is formed with a cutout portion (12). The first auxiliary plate described later is inserted into the cutout 12.

The first auxiliary plate 40 is installed below the upper plate. The first auxiliary plate 40 is formed to have a size corresponding to the size of the cutout of the upper plate, the side edge of the first auxiliary plate 40 corresponds to the first fastening hole 11 of the upper plate. A plurality of second fastening holes 41 are formed. The second fastening hole 12 is formed to coincide with the position where the first fastening hole is formed, and the fastening means penetrating the first fastening hole is inserted into the second fastening hole and fastened.

In addition, a plurality of third fastening holes 42 penetrating the first auxiliary plate in the thickness direction are formed on an upper surface of the first auxiliary plate 40. A fastening means such as a bolt or a screw is inserted into the third fastening hole and fastened to a fastening hole formed in a pad part to be described later to fasten the first auxiliary plate and the pad part. Thus, the first auxiliary plate is fastened to the side with the upper plate, it is configured to be fastened in the vertical direction to the pad portion.

As described above, without installing the pad portion directly on the upper plate fixed to the upper structure of the piers by welding or the like, the auxiliary plate is installed between the upper plate and the pad portion and the pad portion is fastened to the auxiliary plate, And the auxiliary plate by a screw or bolt at the side rim, so that when the pad part needs to be replaced by aging or damage, the upper plate and the auxiliary plate are released from the screw or bolt on the side and the auxiliary plate is removed. After removing the screw and bolt of the plate and the pad part, the pad part can be easily removed from the auxiliary plate, so that it is easy to install, replace or maintain, and reduce the cost and time required for replacement or maintenance. Can be.

The pad part 30 is installed below the first auxiliary plate. The pad part 30 is composed of a rubber pad 31 formed of a rubber material having elasticity, and a plurality of metal plates 32 embedded in the rubber pad. The plurality of metal plates 32 are arranged to be spaced apart at regular intervals in the rubber pad, and are configured to accommodate the vertical load by preventing the expansion of the rubber pad 31 and increasing the load capacity against the vertical load.

In addition, a fastening hole 33 into which the fastening means penetrating the first auxiliary plate in the thickness direction is inserted into the upper and lower surfaces of the pad part 30, and the fastening means penetrating the lower plate in the thickness direction is inserted. Fastening holes 34 are provided respectively.

A lower plate 20 is provided below the pad part 30 to be fixed to an upper surface of a lower structure of the bridge, for example, a bridge or a pillar of the bridge. In the present embodiment, the lower plate is formed to have a substantially square shape and a predetermined thickness in the same manner as the upper plate. The lower plate 20 is provided with a fastening hole 21 through which a fastening means such as a bolt or a screw passes, and the fastening hole 34 formed in the lower surface of the pad part by passing the fastening means from the bottom of the lower plate. Is inserted into and configured to fasten the pad portion and the lower plate.

A support anchor 50 is installed on the bottom of the lower plate. The support anchor is fixed to the lower plate by inserting a fastening means from an upper surface of the lower plate to fix the support anchor.

The other side of the support anchor is inserted into an insertion hole previously formed in the upper surface of the lower structure of the bridge, and then casts concrete into the insertion hole to be integrally connected with the lower structure.

In addition, the support anchor 50 may further include a height adjusting unit 52. A hollow part is formed on an inner surface of the lower end of the support anchor, and a thread 51 is provided on an inner wall of the hollow part. The height adjusting portion 52 is formed with a screw thread 52a for screwing into a screw thread formed in the hollow portion, and the lower portion is configured to have an enlarged tip having a larger diameter than the side on which the screw thread 52a is formed. It is desirable to configure so that the structure can be more stably supported. The thread 52a may be inserted into the hollow portion of the support anchor and screwed to the support anchor to adjust the distance between the lower plate and the upper surface of the lower structure of the bridge.

Protruding protrusions 60 are provided on the bottom surface of the upper plate and / or the upper surface of the lower plate. The protruding protrusion is composed of an upper protruding protrusion 62 fixed to the bottom of the upper plate and protruding toward the lower side, and a lower protruding protrusion 61 fixed to the upper surface of the lower plate and protruding toward the upper side. Wedges are formed at the portions where the plate and the lower plate are fixed to each other, thereby limiting the relative movement of the bridge top plate relative to the bridge by the interaction of the upper protrusions and the lower protrusions, and a large force in the horizontal direction such as an earthquake. When acting, the rubber pad can be deformed while absorbing impact force, and protects the rubber pad from being damaged from external factors.

On the other hand, the elastic bearing assembly 1 according to the present invention further includes a sleeve form (70). The sleeve form 70 is pre-embedded at the position where the elastic bearing is to be installed in the formwork of the substructure at the time of reinforcement of the substructure of the bridge, and is configured to be removed after the concrete is cured after concrete pouring of the bridge.

The sleeve foam 70 includes an outer foam 71 and an inner foam 72.

The outer foam 71 is a foam main body 71a formed of a plastic material such as PVC, and a corrugated surface formed of the same material as the foam main body 71a and integrally installed on the foam main body and formed in a wave shape toward the inside. 71b is provided.

The inner foam 72 is formed of a material such as paper or PVC and is formed to a thickness that can withstand a predetermined size of pressure, is accommodated in the outer foam and disposed in contact with the inner surface of the outer foam. In addition, the hook 73 fixed to the inner foam may be further installed at a predetermined position in the longitudinal direction of the inner foam 72, ie, within a range of the worker's hand.

As a result, the sleeve form is buried in advance before concrete placement of the bridge undercarriage, and when concrete is cured after concrete placement of the bridge, the hook is gripped and the inner foam is removed from the outer foam. At this time, since the inner foam is not attached to the concrete of the substructure, the inner foam can be easily removed by simply grasping and pulling out the hook. Then, if the outer foam is pressed toward the side where the corrugated surface is formed, that is, toward the center of the outer foam, the corrugation of the corrugated surface can be easily bent as it expands, even if the outer foam is in contact with concrete. It can be easily removed.

Therefore, even if the length of the support anchor is long, the embedding and removal of the corresponding sleeve form is easy, so the construction is simple and the cost and time required for the construction can be reduced.

On the other hand, the construction method of the elastic bearing assembly according to the present invention having the configuration as described above will be described.

As shown in Fig. 8, first, a sleeve form having an inner foam formed in a hollow cylindrical shape at the time of reinforcement of the lower structure of a bridge, and an outer foam surrounding the inner foam and having an inner wavy surface formed on the inner surface thereof. Buried At this time, the upper opening of the sleeve foam is temporarily closed by means of a tape or the like.

Then, after the concrete is poured into the undercarriage of the bridge and cured, the inner foam is removed and the outer foam is pressed inwards towards the corrugated surface to remove the outer foam to remove the sleeve form from the undercarriage of the bridge. Simply remove

Then, the support anchor is installed in the space formed by the sleeve form.

Then, a lower plate is installed on the upper portion of the support anchor through fastening means, and a pad portion having a rubber pad and a plurality of metal plates is fastened to the lower plate.

Then, the first auxiliary plate is installed on the upper part of the pad part by fastening means such as a bolt, the first auxiliary plate is inserted into the cutout formed on the bottom, and then the first auxiliary plate is formed through the fastening hole formed in the edge. Fastening the upper plate to the top of the plate to complete the installation of the elastic bearing assembly.

<Example 2>

5 is a view showing another example of the elastic bearing assembly according to the present invention.

In the embodiment shown in FIG. 5, since the configuration of the lower plate is different from that of the first embodiment and the other configuration is the same, the same reference numerals are assigned to the same components, and redundant descriptions are omitted.

As shown in Fig. 5, the lower plate 20 'of this embodiment has a cutout and an auxiliary plate like the upper plate of the first embodiment.

On the upper surface of the lower plate 20 'is formed a recessed second cutout 21'. A plurality of lower plate fastening holes are formed at the edge of the lower plate 20 '.

The second auxiliary plate 22 'is inserted into the second cutout 21'. The second auxiliary plate 22 ′ is provided with a plurality of second lower plate fastening holes corresponding to the lower plate fastening holes, and a fastening hole penetrating the second auxiliary plate in a thickness direction is formed. It is fastened to the upper and lower direction and the other side is configured to be fastened in the side direction to the lower plate (20 ').

As a result, the pad part can be easily removed from the lower plate and the second auxiliary plate similarly to the upper plate of the first embodiment, thereby making it easy to install, replace or maintain, and reduce the cost and time required for replacement or maintenance. can do.

<Example 3>

6a and 6b are views showing still another example of the elastic bearing assembly according to the present invention. In the present embodiment, since the configuration of the lower plate and the first auxiliary plate is different from that of the first embodiment and the other configuration is the same, the same reference numerals are assigned to the same components, and duplicate descriptions are omitted.

As shown in Figs. 6A and 6B, a third cutout portion 41 which is concavely cut is formed on the bottom of the first auxiliary plate. In addition, the upper surface of the lower plate is formed with a concave fourth cut portion 22 is formed.

As a result, since the pad part is inserted into and installed in the third and fourth cutout parts, the pad part can be accurately maintained, and the pad part can be easily installed and stably prevented from being displaced from the pad part.

This embodiment is merely a part of the technical idea included in the present invention clearly, and modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical idea included in the specification of the present invention are all Obviously, it is included in the technical idea of the present invention.

1: elastic bearing assembly
10: upper plate 20: lower plate
30: pad portion 40: first auxiliary plate
50: support anchor
60: protrusion

Claims (7)

An upper plate fixed to the bottom of the upper structure of the bridge, the upper plate having a plurality of first fastening holes in the cutout and the rim which are concavely cut in the bottom;
A lower plate fixedly installed on an upper surface of the lower structure of the bridge;
A pad part having a plurality of metal plates disposed between the upper plate and the lower plate, the rubber pad being formed of an elastic rubber material and disposed in the rubber pad and spaced apart from each other by a predetermined distance;
A plurality of third fastening holes are inserted into the cutout portion of the upper plate and formed at the edge thereof to be fastened to a plurality of second fastening holes corresponding to the first fastening holes and the pad part, and one side is fastened to the pad part; The other side and the first auxiliary plate is fastened to the upper plate,
One side is fixed to the bottom surface of the lower plate and the other side elastic support assembly characterized in that it has a support anchor inserted into the upper surface of the lower structure of the bridge.
The method of claim 1,
It is installed on the outside of the pad portion is fixed to the upper plate or the lower plate elastic support assembly characterized in that it further comprises a projection for preventing and protecting the separation of the pad portion.
The method of claim 1,
The lower plate is further provided with a plurality of lower plate fastening holes in the second incision and the edge cut in concave on the upper surface,
A second auxiliary plate inserted into the second cutout of the upper plate and having a plurality of second lower plate fastening holes corresponding to the lower plate fastening holes formed at an edge thereof, one side of which is fastened to the pad part and the other of which is fastened to the lower plate; An elastic bearing assembly comprising a plate.
The method of claim 1,
The bottom of the first auxiliary plate is formed with a concave third cut portion,
The upper surface of the lower plate is formed with a concave fourth cut portion,
And the pad part is inserted into and installed in the third and fourth incisions.
The method of claim 1,
A thread is formed on an inner surface of the lower end of the support anchor,
And a height adjusting part screwed to the support anchor to adjust a distance between the lower plate and the upper surface of the lower structure of the bridge.
The method of claim 1,
Further provided with a sleeve form buried in the substructure of the bridge is removed after the concrete hardening of the bridge,
And the sleeve foam has an inner foam formed in a hollow cylindrical shape, and an outer foam surrounding the inner foam and having an inner wavy surface formed with a wavy wave shape.
Embedding a sleeve form having an inner foam formed in a hollow cylindrical shape when reinforcing the lower structure of the bridge, and an outer foam surrounding the inner foam and having an inner wavy surface formed thereon;
After the concrete is poured into the undercarriage of the bridge and cured, the inner foam is removed and the outer foam is pressed inwards toward the corrugated surface to remove the outer foam to remove the sleeve form from the undercarriage of the bridge. Wow,
Installing a support anchor in a space formed by the sleeve form;
Installing a lower plate on an upper portion of the support anchor;
Fastening a pad part having a rubber pad and a plurality of metal plates to the lower plate;
Installing a first auxiliary plate on the pad part;
And inserting the first auxiliary plate into a cutout formed at a bottom surface, and then fastening the upper plate to an upper portion of the first auxiliary plate through a fastening hole formed at an edge thereof. .

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