JP2787770B2 - Elastic bearing device for bridge and its installation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic bearing device for a bridge provided between an upper structure such as a bridge girder and a lower structure such as a pier or an abutment, and a method of installing the same.

[0002]

2. Description of the Related Art Conventionally, at both ends in the longitudinal direction of a girder of a steel upper supporting member, projections projecting in a direction orthogonal to the longitudinal direction of the girder (girder width direction) are integrally provided, and a lower portion fixed to an abutment is provided. A support member is integrally provided with the lower support member to protrude upward so as to face the protrusion at a distance from the protrusion, and a rubber layer is provided between the upper support member and the lower support member. A rubber stopper is interposed between the holding member and one of the side protrusions in the longitudinal direction of the spar while the rubber layer is shear-deformed in the direction opposite to the spar shrinkage direction. There is known a rubber bearing device in which a concrete girder is built on an upper part of an upper supporting member in the rubber bearing device in a state.

After the concrete girder is built, the stopper is pulled out by a jack or the like and removed, so that the rubber bearing can be set to a neutral position where the rubber bearing is not sheared and deformed after the concrete girder has dried or creeped. When the spar moves in the longitudinal direction, a structure having a movement restricting member that supports the spar by engaging the side projecting portion with the holding member is known.

[0004]

On the other hand, there is a case of a long concrete girder having a girder having a length of 100 m to 200 m in recent years. In this case, at the time of an earthquake, the laterally projecting portion or the holding member is in the longitudinal direction of the girder. When they move relative to each other and hit each other, a huge collision force of a bridge girder made of concrete or the like acts on the holding member or the side projection, so it is necessary to increase the size of the holding member or the side projection. In addition, there is a problem that the entire rubber bearing device becomes large in size, so that the weight becomes large and the abutment needs to be designed large. Also,
If the movement restriction member is destroyed during an earthquake, there is a problem that it is difficult to repair the destroyed member and the like.

[0005] Therefore, A. There is a design philosophy that it is more reasonable to support the lateral protrusion and the holding member with a rubber bearing without abutment in the longitudinal direction of the girder, and to support the rubber bearing while cushioning the shear deformation resistance of the rubber bearing. However, also in this case, B.I. When erection or construction of a concrete girder or the like, it is necessary to install the rubber bearing in a state where the rubber bearing has been sheared in advance. The present invention relates to the conventional problems and the A
It is an object of the present invention to provide an elastic bearing device for a bridge and a method for installing the same, which can simultaneously and advantageously eliminate both the conditions (A) and (B).

[0006]

According to a first aspect of the present invention, a lower support member fixed to a lower structure and an upper support fixed to an upper structure are provided. In a bearing device in which an elastic bearing member 5 is provided between the supporting member 4 and the holding member 6 projecting upward from the lower supporting member 2, a bearing member 8 having a projecting portion 7 is attached to the upper supporting member. A stopper 9 is detachably mounted between the projection 7 and the holding member 6 in a state where the elastic bearing member 5 is preliminarily sheared and deformed.

In the second invention, the lower structure 1
An elastic support 5 is provided between a lower support member 2 fixed to the upper structure 3 and an upper support member 4 fixed to the upper structure 3, and a holding member 6 is provided on the lower support member 2 to protrude upward. A supporting member provided on the upper support member so as to protrude in the girder width direction so as to face the holding member; and a support member having the protruding portion is provided on the upper support member. And the elastic support 5 is provided between the protrusion 7 and the holding member 6.
Is preliminarily sheared and a stopper 9 is detachably interposed.

[0008] In the third invention, the lower structure 1
In a bridge longitudinal direction of the upper support member 4 in an elastic support device for a bridge having an elastic support member 5 between a lower support member 2 fixed to the upper member and an upper support member 4 fixed to the upper structure 3. At one end, a support member 8 having a protrusion 7 protruding in the girder width direction is detachably attached, and a holding member 6 protruding upward so as to face the protrusion 7 is provided on the lower support member 2. A stopper 9 is detachably interposed between the projecting portion 7 and the holding member 6 in a state where the elastic bearing member 5 is sheared and deformed in the longitudinal direction of the beam, and then the lower support member 2 is fixed to the lower structure. Then, after constructing the upper structure 3 on the upper part of the upper support member 4, the stopper 9 is removed, and then the bearing member 8 is removed.

Further, in the fourth invention, the lower structure 1
An elastic support 5 is provided between a lower support member 2 fixed to the upper member 3 and an upper support member 4 fixed to the upper structure 3, and a holding member 6 is provided on the upper support member 4 to project downward. In the bearing device, a support member 8 having a protrusion 7 is detachably attached to the lower support member 2, and the elastic support body 5 is pre-shear-deformed between the protrusion 7 and the holding member 6. In this state, the stopper 9 is detachably interposed.

In the fifth invention, the lower structure 1
An elastic support 5 is provided between a lower support member 2 fixed to the upper member 3 and an upper support member 4 fixed to the upper structure 3, and a holding member 6 is provided on the upper support member 4 to project downward. In the bearing device, a support member 8 having a protrusion 7 is detachably attached to the lower support member 2, and the elastic support body 5 is pre-shear-deformed between the protrusion 7 and the holding member 6. In this state, the stopper 9 is detachably interposed.

Further, in the sixth invention, the lower structure 1
The lower support member 2 fixed to the upper structure and the upper support member 4 fixed to the upper structure 3 have an elastic support member 5 between the lower support member 2 and the upper support member 4. At one end, a support member 8 having a projecting portion 7 projecting in the girder width direction is detachably attached, and a holding member 6 projecting downward so as to face the projecting portion 7 is provided on the upper support member 4. A stopper 9 is detachably interposed between the projecting portion 7 and the holding member 6 in a state where the elastic bearing member 5 is sheared and deformed in the longitudinal direction of the beam, and then the lower support member 2 is fixed to the lower structure. Then, after constructing the upper structure 3 on the upper part of the upper support member 4, the stopper 9 is removed, and then the bearing member 8 is removed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 4 show an embodiment of the present invention, in which an upper part of an anchor member 11 such as a plurality of anchor bolts is welded to a lower part of a steel lower supporting member 2 having a locking ridge 56 at a lower part. Alternatively, the lower portion of the steel lower support member 2 and the anchor member 11 are embedded and fixed in the concrete lower structure 1 such as an abutment, and the central portion of the horizontal upper surface 12 of the lower support member 2 is fixed by screwing. Is provided with a locking recess 13 having a circular cross section. The locking recess 13 has an upper projecting portion 16 and a lower projecting portion 17 on the upper surface and the lower surface of a central portion of a steel plate 14 having a substantially rectangular flat surface.
The lower protruding portion 16 of the steel lower plate 18 provided with is fitted and locked, and the lower surface of the steel plate 14 of the steel lower plate 18 is placed on the horizontal upper surface 12 of the lower support member 2. When the steel lower plate 18 is mounted on the lower supporting member 2, the elastic
Are previously fixed to the steel lower plate 18 with bolts or the like.

On the upper surface 12 of the lower support member 2, a plurality of female screw holes 25 are provided at both ends in the longitudinal direction of the girder (bridge axis direction) at intervals in a direction perpendicular to the bridge axis.
A pair of holding members 6 extending in the bridge axis direction are integrally and protruded from the both ends in the girder width direction (direction orthogonal to the bridge axis) in parallel and upward with a space therebetween. At the upper end of the inner side surface, there is provided an inwardly extending step portion 28 extending in the bridge axis direction, comprising a horizontal bearing upper surface 26 and a vertical bearing wall surface 27 connected at a right angle thereto.

Female screw holes 29 are provided at both ends in the bridge axis direction of the vertical bearing wall surface 27 in each of the inwardly facing steps 28.

FIGS. 8 to 1 show the respective vertical bearing wall surfaces 27.
As shown in FIG. 0, one side surface of a plate-like cushioning rubber packing body 30 made of an elastic material such as rubber is provided with a slip bearing member 31 such as an ethylene tetrafluoride layer, and the other side surface is made of a stainless steel plate or the like. The metal plate 32 of the shock-absorbing rubber packing 34 having the lateral holes 33 for bolt insertion at both ends is disposed so as to contact the vertical support wall surface 27, The buffer packing 34 is placed on the upper support surface 26 by a small screw or bolt 35 inserted into the passage horizontal hole 33 and screwed into the female screw hole 29 of the vertical support wall 27. 27.

Around the lower projecting portion 17 of the steel lower plate 18, there are provided a plurality of stepped vertical through holes 37 having an enlarged diameter hole on the lower surface side. The plate 20 is provided with a plurality of female screw holes 37, which are inserted through through holes in the steel lower plate 18 and are screwed into female screw holes 41 of the steel lower support plate 20 by hexagon socket head cap screws 38. The lower steel plate 18 and the elastic bearing 5 are integrally fixed.

Both ends of the steel lower plate 18 in the longitudinal direction of the girder (bridge axis direction) are provided so as to protrude from the elastic bearing member 5. A plurality of bolt insertion vertical holes 48 are provided at intervals in a direction perpendicular to the direction. Further, the steel lower plate 18 is provided with locking recesses 62 that are laterally opened at both ends in the girder width direction (direction perpendicular to the bridge axis) at one end side in the longitudinal direction of the bridge girder (bridge axis direction). ing.

The lower support member 2 and the steel lower plate 18 are spaced apart from each other in the longitudinal direction of the girder at a position apart from the stepped through hole 40 provided in the lower steel plate 18 in the girder width direction. And is integrally fixed by a bolt 49 screwed into the female screw hole 25 of the lower support member 2.

The steel lower plate 18 is shown in FIG.
As shown in FIG. 9 and FIG. 20, the central through-hole of the rectangular steel plate 14 is provided with upper projecting portions 16 on the upper and lower surfaces of the steel plate 14.
A steel column 15 having a circular cross section is fitted or fixed or fixed by welding or the like so that the lower protruding portion 17 protrudes.

Next, the configuration of one embodiment of the elastic bearing member 5 which is placed and locked on the steel lower plate 18 is shown in FIG.
This will be described with reference to FIGS. A steel lower support plate 20 having a locking concave portion 19 opening downward, a steel upper supporting plate 22 having a locking concave portion 21 opening upward, and a plurality of intermediate metal plates 24 such as steel plates interposed therebetween. These are integrally laminated and fixed with an elastic material layer 23 made of an elastic material such as rubber interposed therebetween, and the steel lower support plate 20, the intermediate metal plate 24, and the steel upper support plate 22 A plurality of (four in the illustrated case) plastic deformation-type energy absorbing resistance members 55 made of columnar lead are attached to each of the through holes to form the elastic bearing member 5.

The locking recess 19 of the lower support plate 20 in the elastic bearing 5 is fitted and locked in the upper projecting portion 16 of the steel lower plate 18 and the elastic bearing 5 is It is placed on the lower plate 18 made of glass.

The steel lower plate 18 and the elastic bearing member 5 are inserted into a stepped vertical through hole 36 provided on the lower surface of the steel lower plate 18 and having a diameter-enlarging hole. As described above, the lower portion of the steel lower plate 18 is integrally fixed with a hexagon socket head cap screw 38 screwed into a female screw hole 37 provided in the lower supporting plate 20 of the body 5 and having a downward opening. The protrusion 17 is fitted and locked in the locking recess 13 of the lower support member 2.

A steel plate 14 having a substantially rectangular flat surface is provided in the locking recess 21 of the steel upper support plate 22 in the elastic bearing body 5.
The lower projecting portion 17 of the steel upper plate 39 provided with the upper projecting portion 16 and the lower projecting portion 17 on the upper and lower surfaces of the steel upper support plate 22 is fitted and locked.
The steel upper plate 39 is directly or elastic material layer 2
3 is placed via a conformable layer 57 integral with the third member 3.

Around the upper projecting portion 16 of the steel upper plate 39, a plurality of stepped vertical through holes 40 having an enlarged diameter hole on the upper surface side are provided, and a steel upper support in the elastic bearing member 5 is provided. The plate 22 is provided with a plurality of female screw holes 41, which are inserted through the through holes 40 in the steel upper plate 39, and are provided with the female screw holes 4 in the steel upper support plate 22.
The steel upper plate 39 and the elastic support 5 are integrally fixed by a hexagon socket head cap screw 42 screwed into 1.

Both ends of the steel upper plate 39 in the longitudinal direction of the girder (bridge axis direction) are provided so as to protrude from the elastic bearing member 5. A plurality of bolt insertion vertical holes 43 are provided at intervals in the direction perpendicular to the support plate, and both side ends of the steel upper plate 39 are provided with support member locking recesses opening laterally (in the direction of the girder width). 44 are provided.

On the lower surface side of the center of the support member body 46 of the upper support member 4, a locking concave portion 45 which opens downward is provided, and the flat lower surface of the upper support member 4 is attached to the steel upper plate 39. Placed on the locking recess 4
5 is fitted and locked to the upper protruding portion 16 of the steel upper plate 39.

A lower part of an anchor member 47 such as an anchor bolt is fixed to the upper part of the upper support member 4 by screwing or welding. Further, a plurality of female screw holes 61 are provided at both ends in the longitudinal direction of the girder on the lower surface side of the upper support member 4 at intervals in the girder width direction.

The upper support member 4 and the steel upper plate 39 are spaced apart from the stepped through hole 40 provided in the steel upper plate 39 in the longitudinal direction of the girder in the width direction of the girder. And is integrally fixed by a bolt 49 screwed into the female screw hole 61 of the upper support member 4.

At one end of the upper support member 4 in the longitudinal direction of the girder, there is provided a supporting member locking concave portion 44a which opens laterally at both ends in the girder width direction (side). The support member locking concave portion 44 of the steel upper plate 39 is provided at a position where the support member 4 is overlapped when the upper support member 4 is fixed to the steel upper plate 39.

FIGS. 14 and 15 show the upper support member 4 and the recesses 44a, 44 in the steel upper plate 39, respectively.
FIG. 2 shows a bearing member 8 having a locking arm 54 and a projection 7 fitted and locked to the steel upper plate 3 at both ends of a steel bearing member body 8a extending in the girder width direction.
9 and a projecting portion 7 projecting from the dimension in the girder width direction of the upper support member 4 are integrally provided, and a bolt insertion through-hole 58 extending in the longitudinal direction of the girder is provided at an upper portion of the support member main body 8a at intervals. A plurality of L-shaped locking arms 54 are provided in parallel at a distance from one end of the support member 8 in the longitudinal direction of the beam at a position away from the end face of the projecting portion 7 in the beam width direction.
Are integrally provided, and the locking portions 54a of the locking arms 54 are arranged so as to protrude inward and face each other. The distance between the locking arms 54 is slightly larger than the dimension of the steel upper plate 39 and the upper support member 4 in the girder width direction. The dimensions of the locking portion 54a are set so that they can be fitted so as to substantially match the locking recesses 44, 44a.

Each locking portion 54a of the bearing member 8
Are inserted into the bolt insertion holes 58 of the support member 8 and screwed into the female screw holes 59 of the upper support member 4. The support member 8 is fixed to the upper support member 4 by 60. In this state, the longitudinal end face of each protrusion 7 projecting laterally (in the width direction of the girder) is provided at the end of the upper support member 4 in the longitudinal direction of the girder so as to face the holding member 6. Have been. That is, one side surface of each protrusion 7 in the longitudinal direction of the beam and one side surface of the holding member 6 in the longitudinal direction of the beam are disposed so as to face each other.

As described above, the lower support member 2, the steel lower plate 18, the elastic support 5, the steel upper plate 39, and the upper support member 4 to which the support member 8 having the protruding portion 7 is attached. However, when a pre-shearing deformation is applied to the elastic bearing member 5 of the bearing device which is sequentially attached by bolts or the like and the stopper 9 is attached, the stopper concave portion 62 of the steel lower plate 18 may be provided. In the appropriate pre-shearing deformation imparting device (not shown), the engaging metal fitting on the fixed frame side is engaged, and the upper supporting member 4 or the steel upper plate 39 on the side opposite to the side on which the support member 8 is attached is attached. By engaging the locking fitting on the movable frame side which is engaged with a hydraulic jack such as a hydraulic pressure in the preliminary shear deformation applying device, By extending the length, the steel lower plate 18 on the lower support member 2 side engaged with one fixed-side locking bracket and the upper support member engaged with the other movable-side locking bracket. 4 or the steel upper plate 39 is relatively displaced in the bridge axis direction.
Is inserted between the holding member 6 and the protruding portion 7 of the support member 8, and then the jack of the pre-shearing device is shortened, so that the stopper 9
And the projection 7 on the support member 8.

Next, the installation procedure of the bridge bearing device according to the present invention will be described. Between the lower support member 2 and the upper support member 4 with the support member 8, an elastic support member 5a with a locking plate, in which the steel lower plate 18, the elastic support member 5, and the steel upper plate 39 are integrally fixed, is provided. With the interposition, the elastic support body 5a with the locking plate is fixed to the upper and lower support members 2 and 4 with bolts or hexagon nuts or the like. By moving the upper support member 4 and the lower support member 2 in the bearing device in this state relatively in a direction opposite to the direction of contraction of the girders, the elastic bearing member 5 is pre-shear-deformed, and each holding member caused by this is deformed. A stopper body 9a of a flat L-shaped steel stopper 9 and an adjusting plate 50 such as a shim plate as necessary are interposed in a gap between one end face of the member 6 in the beam longitudinal direction and the protruding portion 7 of the support member 8. Let it.

The pre-shearing deformation of the elastic bearing member 5 and the mounting of the stopper 9 may be performed in a factory or on-site. However, in consideration of temperature correction due to the temperature or the like, the pre-shearing deformation and the stopper 9 etc. Mounting is more preferable than on-site construction because dimensional accuracy is improved.

As described above, the lower support member 2 of the elastic support device for a bridge provided with the elastic support member 5 held in a pre-shear deformed state is fixed to the lower structure 1 such as a concrete abutment or a pier. After that, the upper support member 4
The concrete 51 constituting the upper structure 3 such as a bridge girder is cast on the upper part of the building to build the upper structure 3.

After the concrete has hardened, as shown in FIGS. 27 and 28, a hydraulic jack or another jack is provided between each engaging piece 52 of the steel L-shaped stopper 9 and the holding member 6. The pull-out jack 53 is interposed, and then the stopper 53 is pressed by the jack 53 to pull out from the space between the holding member 6 and the protruding portion 7 of the support member 8 to obtain the state shown in FIG.

Next, the bolt for attaching the support member is removed, and the support member 8 having the protrusion 7 projecting sideways is removed from the upper support member 4. In this state, since the protruding portion 7 has been removed, there is no member that restricts the longitudinal movement of the upper structure 3, and when the upper structure 3 moves in the longitudinal direction due to an earthquake or the like, The elastic bearing member 5 is in a state of receiving the elastic resistance only by the shear deformation.

When the upper structure 3 such as a girder moves in the girder width direction due to an earthquake or the like, the upper structure 3 is supported by the holding member 6 of the lower support member 2.

Next, a pre-stress is introduced into the upper structure 3, and the upper structure 3 is contracted and creeped by the introduction of the pre-stress, and the upper structure is dried and shrunk.
The elastic bearing body 5 of the elastic bearing device is subjected to shear deformation in the pre-shear deformation releasing direction.

In the above embodiment, the lower support member 2
A holding member 6 is provided on the upper support member 4, and a support member 8 having a protrusion 7 is detachably attached to the upper support member 4. However, as shown in FIGS. 33 to 37, the support member 8 is fixed to the lower structure 1. A support member 8 having a protrusion 7 similar to that of the above embodiment is detachably attached to one end of the lower support member 2 in the longitudinal direction of the beam, and a holding member 6 projecting downward is provided on the upper support member 4. Can be implemented in the same manner as in the above-described embodiment, and the same effects can be obtained. Therefore, this embodiment will be described with reference to FIGS. 33 to 37.

In the case of this embodiment, a planar substantially rectangular convex portion having a horizontal upper surface 12 is provided on the upper portion of the lower support member 2 fixed to the lower structure 1, and the convex portion in the longitudinal direction of the girder is provided. At one end, at both ends in the girder width direction, there are provided support member locking recesses 44 that are opened laterally (girder width direction), and the lower steel plate 18 is formed so as to match the locking recesses 44. The supporting member 8 having a projection 7 projecting in the width direction of the girder is provided on the lower supporting member 2 and a bolt 60 screwed into a female screw hole 59 is provided on the lower supporting member 2. It is detachably fixed to. The locking recess 62 of the steel lower plate 18 engaged with the preliminary shear deformation applying device may be left as it is, but the corresponding locking recess 62 may be
It is provided in.

A pair of holding members 6 extending in the bridge axis direction are integrally and protruded downward and in parallel with each other at both ends in the girder width direction on the lower surface of the upper support member 4. At the lower end of the opposing inner surface, there is provided an inwardly extending step portion 28 extending in the bridge axis direction, comprising a horizontal bearing lower surface and a vertical bearing wall surface 27 connected at a right angle thereto. The other configuration is the same as that of the above-described embodiment, and the same can be applied to the support member 8 described later and other modified forms.

As described above, the support member 8 having the projecting portion 7 projecting in the girder width direction is detachably attached to one end of the girder longitudinal direction of one of the upper support member 4 and the lower support member 2. If the holding member 6 is provided so as to face the projection 7 on the other side, the same effect can be obtained.

In the above embodiment, the support member 8 is locked to both the upper support member 4 and the steel upper plate 39 (or both the lower support member 2 and the steel lower plate 18). The support member 8 may be locked only to the upper support member 4 (or the lower support member 2).

In the above embodiment, the steel upper plate 39 and the steel lower plate 18 are provided. However, each of the plates 18 and 39 may be omitted.
In this case, the steel lower support plate 2 in the elastic support 5
The locking concave portion 19 at 0 is a convex portion for locking, or a locking member such as a steel columnar block is fitted over the locking concave portion 19 and the locking concave portion 13 of the lower support member 2. You may make it engage and lock. When the steel upper plate 39 is omitted, the locking concave portion 21 of the steel upper support plate 22 of the elastic bearing member 5 is replaced with a locking convex portion, or the locking concave portion 21 and the upper support Member 4
A locking member such as a steel cylindrical block may be fitted and locked with the locking recess 45 in the above.

Further, in the above embodiment, the upper structure 3 made of concrete is shown, but the upper structure 3 may be made of steel.

In the above embodiment, in order to receive the horizontal force acting when the elastic bearing 5 is subjected to shear deformation, the locking arms 5 are attached to both ends of the single supporting member 8.
38, instead of one supporting member 8, as shown in FIG. 38, a separate and independent short supporting member 8 of the upper supporting member 4 (or the lower supporting member 2) is provided. The bolts 60 may be attached to both ends in the girder width direction. The locking portion 54 as in each of the above examples.
When the support member 8 having the locking arm 54 having the locking portion 54a is used, the locking arm 54 having the locking portion 54a can bear the horizontal force. Can be As shown in FIG. 39, the locking arm 54 in the support member 8 and the locking recesses 44 in the upper support member 4 (or the lower support member 2) and the steel upper plate 39 (or the steel lower plate 18). 44a may be omitted. In this case, the axial section of the bolt 60 may be increased, or the number of bolts 60 may be increased.

[0048]

According to the first, second, fourth and fifth aspects of the present invention, the elastic bearing device for the bridge is installed and fixed to the lower structure 1 with the elastic bearing member 5 preliminarily sheared and deformed. And the upper structure 3 can be erected or built on the upper support member 4, and after the upper structure 3 made of steel or concrete is erected or built, the stopper 9 is held. By pulling out from between the member 6 and the projecting portion 7 of the support member 8 and removing the support member 8, the upper structure 3 such as a girder contracts or the upper structure 3 due to an earthquake or the like moves in the bridge axis direction (girder longitudinal direction). Direction), it can be supported while buffering by the elastic support body 5, and therefore, as in the conventional case, the upper support member 4 fixed to the upper structure 3 side is provided on the lower support member 2 side. Girder longitudinal And abuts against the slip limiting member or the like, there is no risk of destroying it. Further, the girder can be supported in a buffered state without exerting a large supporting force on the lower support member 2, and the structure of the support device is simple.

According to the third or sixth aspect of the present invention, the elastic support member is provided between the lower support member 2 fixed to the lower structure 1 and the upper support member 4 fixed to the upper structure 3. A support member 8 having a projecting portion 7 projecting in the girder width direction is detachably attached to one end of the upper support member 4 (or the lower support member 2) in the girder longitudinal direction in the elastic bearing device for a bridge provided with the bridge member 5. The lower support member 2 (or the lower support member 4) is provided with a holding member 6 protruding upward so as to face the protrusion 7 and an elastic bearing is provided between the protrusion 7 and the holding member 6. A stopper 9 is detachably interposed in a state where the body 5 is shear-deformed in the longitudinal direction of the spar, then the lower support member 2 is fixed to the lower structure, and then the upper structure 3 is mounted on the upper support member 4. After building, remove the stopper 9 Next, since the support member 8 is removed, the bridge elastic support device without a protrusion that restricts the movement of the upper support member 4 in the longitudinal direction of the girder is easily installed between the lower structure 1 and the upper structure 3. The elastic support 5 can be easily installed in a state where the elastic support 5 is sheared in the longitudinal direction of the upper structure 3, and the stopper 9 is removed, so that the restriction on the shear deformation of the elastic support 5 is released. Since the support member 8 is configured to be detachable, the protrusion 7 can be automatically removed by removing the support member 8. Also, the installation procedure is simple.

[Brief description of the drawings]

FIG. 1 is a front view showing an elastic bearing device for bridge support according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partial vertical front view of FIG. 1;

FIG. 4 is a partial vertical side view of FIG. 2;

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a front view showing a lower support member.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a front view of the cushioning rubber packing.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a sectional view taken along line BB of FIG. 8;

FIG. 11 is a plan view of an elastic bearing body.

FIG. 12 is a front view of FIG. 11;

FIG. 13 is a sectional view taken along line CC of FIG. 11;

FIG. 14 is a plan view showing a bearing member having a protrusion.

FIG. 15 is a front view of a bearing member with a protrusion.

FIG. 16 is a plan view showing a relationship between an upper support member and a support member having a protrusion.

FIG. 17 is a plan view of the upper support member.

FIG. 18 is a front view of the upper support member.

FIG. 19 is a plan view showing a steel upper plate.

FIG. 20 is a side view of FIG. 19;

FIG. 21 is a plan view showing a steel lower plate.

FIG. 22 is a side view of FIG. 21.

FIG. 23 is a partially longitudinal side view showing a state where the elastic bearing device is fixed to the lower structure.

FIG. 24 is a partial vertical front view of a portion shown in FIG. 23;

FIG. 25 is a partial vertical front view of FIG. 23;

FIG. 26 is a longitudinal sectional front view showing a state in which an upper structure is built.

FIG. 27 is a partially longitudinal side view showing a state in which a jack for pulling out a stopper has been arranged after the structure has been built.

FIG. 28 is a partial cross-sectional plan view showing a state where a jack for pulling out a stopper is arranged.

FIG. 29 is a partial plan view showing a state where the jack is extended and pulled out.

FIG. 30 is a partial cross-sectional plan view showing a state where a bearing member having a protrusion is removed.

FIG. 31 is a partial longitudinal side view showing the elastic bearing device in the state shown in FIG. 30;

FIG. 32 is a partially longitudinal side view showing a state of a neutral position where contraction of the spar has been completed and the elastic body has not undergone shear deformation.

FIG. 33 is a front view showing an elastic bearing device for bridge support according to another embodiment of the present invention.

FIG. 34 is a side view of FIG. 33.

FIG. 35 is a partial longitudinal side view of FIG. 34;

36 is a sectional view taken along line DD of FIG. 34.

FIG. 37 is a plan view showing a lower support member.

FIG. 38 is a partial cross-sectional plan view showing an elastic bearing device for bridge support using another embodiment of a bearing member having a protrusion.

FIG. 39 is a partial cross-sectional plan view showing a bridge bearing elastic bearing device using another embodiment of the bearing member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower structure 2 Lower support member 3 Upper structure 4 Upper support member 5 Elastic support 6 Holding member 7 Side projection 8 Support member 9 Stopper 10 Projection 11 Anchor member 12 Upper surface 13 Locking recess 14 Steel plate 15 Steel Cylindrical body 16 Upper protruding part 17 Lower protruding part 18 Steel lower plate 19 Locking recess 20 Lower support plate 21 Locking recess 22 Upper support plate 23 Elastic material layer 24 Intermediate metal plate 25 Female screw hole 26 Bearing upper surface 27 Vertical Bearing surface 28 Inward step 29 Internal thread hole 30 Rubber packing body for buffer 31 Slip bearing material 32 Metal plate 33 Bolt insertion horizontal hole 34 Rubber packing for buffer 35 Bolt 36 Stepped vertical through hole 37 Female screw hole 38 Hex socket bolt 39 steel upper plate 40 stepped vertical through hole 41 female screw hole 42 hexagon socket head bolt 43 vertical hole 44 locking recess 4 5 Locking recess 46 Support member main body 47 Anchor member 48 Through hole 49 Bolt 50 Adjusting plate 51 Concrete 52 Engagement piece 53 Pull-out jack 54 Locking arm 55 Resistance member 56 Locking ridge 57 Familiar layer 58 Through hole 59 Female screw hole 60 Bolt 61 Female screw hole 62 Locking recess

Claims (6)

(57) [Claims] An elastic bearing is provided between a lower support member fixed to the lower structure and an upper support member fixed to the upper structure, and the lower support member faces upward. In a bearing device provided with a holding member 6 projecting from the supporting member 8, a supporting member 8 having a projecting portion 7 is detachably attached to the upper support member 4, and between the projecting portion 7 and the holding member 6. An elastic bearing device for a bridge, wherein a stopper 9 is removably interposed in a state where the elastic bearing member 5 is preliminarily sheared and deformed. 2. An elastic bearing member 5 is provided between a lower support member 2 fixed to the lower structure 1 and an upper support member 4 fixed to the upper structure 3, and the lower support member 2 faces upward. The upper support member 4 is provided with a protruding portion 7 protruding in the girder width direction.
In a bearing device provided so as to face the support member, a support member 8 having the protrusion 7 is detachably attached to the upper support member 4, and is provided between the side protrusion 7 and the holding member 6. An elastic bearing device for a bridge, wherein a stopper 9 is removably interposed in a state where the elastic bearing member 5 is subjected to preliminary shear deformation. 3. An elastic bearing device for a bridge, comprising an elastic bearing member 5 between a lower supporting member 2 fixed to a lower structure 1 and an upper supporting member 4 fixed to an upper structure 3. A support member 8 having a protrusion 7 projecting in the width direction of the girder is detachably attached to one end of the upper support member 4 in the longitudinal direction of the girder, and faces upward to the lower support member 2 so as to face the protrusion 7. The stopper 9 is detachably interposed between the projecting portion 7 and the holding member 6 in a state where the elastic support 5 is sheared and deformed in the longitudinal direction of the girder. An elastic bearing for a bridge, wherein the support member 2 is fixed to the lower structure, the upper structure 3 is built on the upper support member 4, the stopper 9 is removed, and then the support member 8 is removed. How to install the device. 4. An elastic bearing 5 is provided between a lower support member 2 fixed to the lower structure 1 and an upper support member 4 fixed to the upper structure 3, and the upper support member 4 faces downward. In a bearing device provided with a holding member 6 protruding from the support member 8, a support member 8 having a protrusion 7 is detachably attached to the lower support member 2, and between the protrusion 7 and the holding member 6, An elastic bearing device for a bridge, wherein a stopper 9 is removably interposed in a state where the elastic bearing member 5 is preliminarily sheared and deformed. 5. An elastic bearing 5 is provided between a lower supporting member 2 fixed to the lower structure 1 and an upper supporting member 4 fixed to the upper structure 3, and the elastic supporting member 5 faces down to the upper supporting member 4. The lower supporting member 2 has a projecting portion 7 projecting in the girder width direction.
In a bearing device provided so as to face the support member, a support member 8 having the protrusion 7 is detachably attached to the lower support member 2, and is provided between the side protrusion 7 and the holding member 6. An elastic bearing device for a bridge, wherein a stopper 9 is removably interposed in a state where the elastic bearing member 5 is subjected to preliminary shear deformation. 6. An elastic bearing device for a bridge, comprising an elastic bearing member 5 between a lower supporting member 2 fixed to a lower structure 1 and an upper supporting member 4 fixed to an upper structure 3. A support member 8 having a protrusion 7 projecting in the width direction of the girder is detachably attached to one end of the lower support member 2 in the longitudinal direction of the girder, and faces downward to the upper support member 4 so as to face the protrusion 7. The stopper 9 is detachably interposed between the projecting portion 7 and the holding member 6 in a state where the elastic support 5 is sheared and deformed in the longitudinal direction of the girder. An elastic bearing for a bridge, wherein the support member 2 is fixed to the lower structure, the upper structure 3 is built on the upper support member 4, the stopper 9 is removed, and then the support member 8 is removed. How to install the device.