JP2000087312A - Object support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an object support structure in which the positioning precision and the directional precision of the subject to be supported are relieved and the execution is simple. SOLUTION: A concrete pedestal 2 is integrally formed on the upper end 1 of a bridge pier and a base plate 3 is installed on the pedestal 2 and fixed by anchor bolts 4. The lower flange 6 of a support body 5 is fixed to the base plate 3 by bolts 7. The base plate 3 is fixed to the pedestal 2 in advance by anchor bolts 4. A guide pin 11 having a square horizontal sectional shape, protruded on the upper flange 8 of the support body 5 is engaged with a recessed hole 19 provided with an inlet opening 17 having a square horizontal sectional shape, to decide the position and direction of the bridge pier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which an object is supported on a lower structure via an elastic bearing, and more particularly to a structure suitable for supporting a bridge girder on a pier.

[0002]

2. Description of the Related Art When a bridge girder is supported on a pier, rubber bearings are widely used along with steel bearings.

In this rubber bearing, a girder is supported on a pier by a bearing having a laminated structure in which a metal plate and rubber are laminated. The metal plate and the rubber are usually vulcanized and bonded.

[0004] The following pre-installation methods are used to install the bearings.
There is after installation.

[0005] In the case of pre-installation, prior to the construction of the upper structure, the support is installed at a predetermined position on the lower structure,
Fix with non-shrink mortar. This method is often used for the construction of cast-in-place concrete bridges. In the case of post-installation, the bearing is temporarily installed at the position where the box was removed, and after the superstructure is erected, the installation position is checked again, and if necessary, the position is corrected and fixed with non-shrink mortar. This method is used for the construction of steel bridges and precast concrete bridges. In addition, as one method of the post-installation method, there is a method of installing the lower shoe by adjusting the welding position of the lower shoe on the base plate. In this method, the support is temporarily installed on the base plate that has been adjusted in height and fixed, and after the installation of the upper structure is completed, the flat position is adjusted, and the lower shoe is welded to the predetermined position and fixed And the error can be easily corrected.

[0006]

In the case of the above-mentioned pre-installation, it is necessary to position and orient the bearing body very accurately, which is troublesome. Even in the case of post-installation, it is necessary to accurately position the anchor bolt holes for fixing the support to the pier.
In the method (1), it takes time to perform welding control on site.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an object support structure in which the positioning and orientation accuracy of a support body is reduced and the construction is simple.

[0008]

According to a first aspect of the present invention, there is provided an object support structure in which an object is supported on an upper surface of a lower structure via an elastic support, wherein the upper surface of the elastic support and the object are supported. A guide pin protrudes from one of the lower surface and a concave hole is provided on the other, and the guide pin is inserted into the concave hole. At least one of the guide pin and the concave hole has
A tapered portion for guiding the insertion of the guide pin is provided, and the guide pin and the inner surface of the concave hole engaging with the guide pin have a non-circular horizontal cross-sectional shape.

In such an object support structure, when an object is loaded on the elastic support installed on the lower structure, the guide pin is smoothly guided into the concave hole by being guided by the tapered portion. The center of the hole coincides with the center, and the lower structure and the object are aligned. Therefore, the positioning accuracy when the elastic bearing is installed on the lower structure is reduced. In addition, since the guide pin and the inner surface of the concave hole have a non-circular horizontal cross-sectional shape, the directions of the elastic bearing body and the object can be matched.

According to a second aspect of the present invention, there is provided a support structure in which an object is supported on an upper surface of a lower structure via an elastic support, wherein a lower surface of the elastic support and an upper surface of the lower structure are connected. A guide pin is protruded on one side and a concave hole is provided on the other, and the guide pin is inserted into the concave hole,
At least one of the guide pin and the concave hole is provided with a tapered portion for guiding the insertion of the guide pin, and the guide pin and the inner surface of the concave hole engaging with the guide pin have a non-circular horizontal cross-sectional shape. It is characterized by having.

In such an object support structure, an elastic support is attached to the lower surface of the object, and the object is loaded on the lower structure by lowering the support on the lower structure. In this case as well, the guide pin is smoothly guided into the concave hole by being guided by the tapered portion, whereby the center between the guide pin and the concave hole is aligned, and the positioning of the lower structure and the object is performed. Therefore, when the connecting member of the elastic bearing is provided on the lower structure, the positioning accuracy of the connecting member is reduced. In addition, since the guide pin and the inner surface of the concave hole have a non-circular horizontal cross-sectional shape, the directions of the elastic bearing body and the object can be matched.

According to a third aspect of the present invention, there is provided a support structure in which an object is supported on an upper surface of a lower structure via an elastic support, and a guide pin is provided on one of the upper surface of the elastic support and the lower surface of the object. Is protruded and a concave hole is provided on the other side,
The guide pin is inserted into the concave hole, and at least one of the guide pin and the concave hole is provided with a tapered portion for guiding the insertion of the guide pin. The upper surface of the elastic bearing body and the object An auxiliary guide pin is protruded from one of the lower surfaces and an auxiliary concave hole is provided on the other, and the auxiliary guide pin is inserted into the auxiliary concave hole.

In such an object support structure, when an object is loaded on the elastic support installed on the lower structure, the guide pin is guided by the tapered portion and smoothly enters the concave hole, whereby the guide pin and the concave are formed. The center of the hole coincides with the center, and the lower structure and the object are aligned. Therefore, the positioning accuracy when the elastic bearing is installed on the lower structure is reduced. In addition, since the auxiliary guide pin and the auxiliary concave hole are engaged with each other in addition to the guide pin and the concave hole, the directions of the elastic bearing body and the object can be matched.

According to a fourth aspect of the present invention, there is provided a support structure in which an object is supported on an upper surface of a lower structure via an elastic support, wherein one of the lower surface of the elastic support and the upper surface of the lower structure is provided. A guide pin is protruded and a concave hole is provided on the other side, and the guide pin is inserted into the concave hole. At least one of the guide pin and the concave hole has a tapered shape for guiding the insertion of the guide pin. An auxiliary guide pin is provided on one of a lower surface of the elastic bearing and an upper surface of the lower structure, and an auxiliary concave hole is provided on the other. It is characterized by being inserted into a hole.

In such an object support structure, an elastic support is attached to the lower surface of the object, and the object is loaded on the lower structure such that the support is lowered onto the lower structure. In this case as well, the guide pin is smoothly guided into the concave hole by being guided by the tapered portion, whereby the center between the guide pin and the concave hole is aligned, and the positioning of the lower structure and the object is performed. Therefore, when the connecting member of the elastic bearing is provided on the lower structure, the positioning accuracy of the connecting member is reduced. In addition, since the auxiliary guide pin and the auxiliary concave hole are engaged with each other in addition to the guide pin and the concave hole, the directions of the elastic bearing body and the object can be matched.

In the present invention, it is preferable that the lower structure is a bridge pier, the object is a bridge girder, and the elastic bearing is a laminate of rubber and a metal plate.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a configuration diagram of the object bearing structure according to the first embodiment of the present invention in a direction perpendicular to the bridge axis, FIG. 1 (b) is an enlarged view of the vicinity of the concave hole in FIG. FIG. 2 is a structural view of the object support structure according to the embodiment in the bridge axis direction, FIGS. 3 (a) to 3 (c) are construction process diagrams of the object support structure according to the embodiment in the bridge axis direction, FIG. (A) to (d) are cross-sectional views showing an engagement relationship between a guide pin and a guide hole during construction, and FIG. 5 is a perspective view of the guide pin. The first
2 (a) and FIG. 2 are longitudinal sectional views of the right half.

In this embodiment, a pedestal 2 is integrally formed of concrete on a pier top 1 made of concrete, a base plate 3 is installed on the pedestal 2, and the base plate 3 is fixed by anchor bolts 4. ing. The lower flange 6 of the elastic support 5 is fixed to the base plate 3 by bolts 7.
The support 5 has a structure in which a laminated body of the rubber 9 and the metal plate 10 is interposed between the upper flange 8 and the lower flange 6.

A guide pin 11 is provided at the center of the upper flange 8.
Are fixed by welding or the like. As shown in FIG. 5, the lower half of the guide pin 11 is a prism-shaped portion 11b, and the upper half is a tapered portion (a truncated pyramid-shaped portion) having a smaller diameter as it goes upward.
11a.

The bridge girder 13 is made of concrete in this embodiment, and a metal plate 15 such as an iron plate is fixedly attached to the lower surface of the bridge axial direction end by an anchor bolt 14. An opening 17 into which the guide pin 11 is inserted is provided in a central portion of the plate 15.

As shown in FIG. 4 (a), the opening 17 has a tapered portion 17a having a lower half having a rectangular horizontal cross-sectional shape, and a rectangular shape having an upper half having a rectangular horizontal cross-sectional shape. It is a hole 17b. The tapered portion 17a has a tapered shape in which the size of the square becomes larger downward. This opening 1
7 is provided with a concave portion 18 in the concrete portion above,
The opening 17 and the concave portion 18 form a concave hole 19. Reference numeral 18a denotes a metal casing surrounding the concave portion 18.

The upper flange 8 is provided with a plurality of bolt insertion holes at predetermined intervals along the outer edge, the plate 15 is provided with a female screw hole, and the bolt 20 is connected to the bolt insertion hole. It is configured to be screwed into this female screw hole.

To carry out the work of placing the girder 13 on the pier,
First, as shown in FIG.
With bolts 7. (The base plate 3 is fixed to the pedestal 2 in advance by the anchor bolts 4.) Next, the spar 13 is lowered onto the support 5 as shown in FIG. 3 (b).
At this time, the upper end of the guide pin 11 engages with the opening 17.

When the center of the guide pin 11 is slightly deviated from the center of the opening 17, the tapered portion 11a of the guide pin 11 contacts the tapered portion 17a of the opening 17 as shown in FIGS. 4 (b) and 4 (c). And the center of the guide pin 11 is the opening 1
The support 5 is deformed in the horizontal shear direction so as to be drawn to the center of the support 7.

When the direction of the guide pin 11 is slightly deviated from the direction of the concave hole 19, the supporting member 5 is set so that the direction of the side of the guide pin 11 and the direction of the side of the opening 17 coincide.
Deform to twist.

Eventually, the lower half 1 of the prismatic pillar-shaped guide pin 11 will be described.
1b is aligned with the rectangular hole 17b of the opening 17, the guide pin 17 is inserted deeply into the concave hole 19 as shown in FIG. 4 (d), and the plate 15 is seated on the upper flange 8 of the support body 5. Then, the bolt 20 is fastened to the plate 15 through the upper flange 8 to connect the support body 5 and the plate 15. In this case, the relative position and direction of the support 5 and the plate 15 are almost exactly as designed, and the bolt insertion hole of the upper flange 8 and the female screw hole of the plate 15 are aligned. Can be easily tightened.

As described above, when the girder 13 is loaded on the support 5 mounted on the pedestal 2 of the pier top 1, the opening 1
Even if the center of 7 and the center of the guide pin 11 are slightly displaced or the directions of both are slightly displaced, the beam 13 is placed on the support body 5 while being aligned and aligned, and both are firmly connected. be able to. If the position or direction of the opening 17 is deviated from the center of the guide pin 11, the guide pin 11 engages with the opening 17, causing distortion in the support body 5. It is not enough to make an impact.

FIG. 6 shows a guide pin 110 and an auxiliary guide pin 2 employed in the third embodiment of the present invention.
It is a perspective view of the upper flange 8 'with 10.

The guide pin 110 has a tapered portion having a truncated conical shape at the distal end 111 and a straight cylindrical portion at the proximal end 112. The auxiliary guide pin 210 has a distal end 211
Is a truncated conical tapered portion, and the proximal end 212 is a straight cylindrical portion.

When using the bearing 5 having the upper flange 8 'with the guide pin 110 and the auxiliary guide pin 210, the bridge girder 13 is provided with a concave hole and an auxiliary concave hole. And the auxiliary guide pin 21
0 is engaged with the auxiliary concave hole. By engaging the guide pin and the concave hole and the auxiliary guide pin and the auxiliary concave hole in this manner, even if the position and the direction of the support body 5 and the bridge girder 13 are slightly shifted, both can be accurately positioned. Positioning and orientation can be firmly connected.

In the above embodiment, the guide pin 1
1, 110 and an auxiliary guide pin 210 are provided on the upper flange 8 of the support body 5, and a concave hole 19 and an auxiliary concave hole are provided on the spar 13, but the guide pin and auxiliary guide pin are provided on the spar 13 and the concave hole is supported. It may be provided on the body 5. However, in order to prevent damage to the guide pins and the auxiliary guide pins during transportation and during standby for construction, it is preferable to provide the support pins 5 with the guide pins and the auxiliary guide pins.

In the embodiments of the first and third aspects of the present invention, the support 5 is installed on the pedestal 2 first.
In the second and fourth embodiments of the present invention, the support 5 is attached to the lower surface of the spar 13 in advance. In the case of the second and fourth aspects, the lower flange 6 is provided with a guide pin or a concave hole, and the base plate 3 is provided with a concave hole or a guide pin. In the case of claim 4, an auxiliary guide pin is further provided on the lower flange 6, and an auxiliary concave hole is provided on the base plate 3. Even in this case, the guide pin of the support 5 is aligned with the concave hole, and in the case of claim 4, the girder 13 is mounted on the pier while the auxiliary guide pin is further aligned with the auxiliary concave hole. By doing so, the positioning and orientation accuracy of the base plate 2 can be relaxed, and the positioning and orientation accuracy of the support 5 with respect to the beam 13 can also be relaxed.

In the present invention, the tapered portion may be provided only on one of the guide pin and the concave hole, but preferably provided on both sides as shown in the figure. Similarly, it is preferable to provide a tapered portion in both the auxiliary guide pin and the auxiliary concave hole.

The present invention is also applicable to a steel bridge support. Further, the present invention is also applicable to a bearing structure for various objects other than the bridge girder.

[0035]

As described above, according to the object support structure of the present invention, when performing the work of supporting the object via the elastic support, the positioning accuracy and the direction accuracy of the support and the like are relaxed, and the work is performed. It will be very easy to do.

The present invention is very suitable for supporting heavy objects such as bridge girders.

[Brief description of the drawings]

FIG. 1A is a configuration diagram of a body support structure according to an embodiment in a direction perpendicular to a bridge axis, and FIG. 1B is an enlarged view of the vicinity of a concave hole in FIG.

FIG. 2 is a configuration diagram of an object bearing structure according to an embodiment in a bridge axis direction.

FIG. 3 is a construction process diagram in the bridge axis direction of the object bearing structure according to the embodiment.

FIG. 4 is a cross-sectional view showing an engagement relationship between a guide pin and a concave hole during construction.

FIG. 5 is a perspective view of a guide pin.

FIG. 6 is a perspective view of a guide pin and an auxiliary guide pin employed in another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge pier end 2 Pedestal 3 Base plate 5 Elastic bearing 6 Lower flange 8 Upper flange 11, 110 Guide pin 11a, 111 Tapered portion 13 Bridge girder 15 Plate 17 Opening 17a Tapered portion 18 Depression 19 Concave hole 210 Auxiliary guide pin 211 Tapered portion

Claims (6)

[Claims] 1. A support structure in which an object is supported on an upper surface of a lower structure via an elastic support, wherein a guide pin protrudes from one of an upper surface of the elastic support and a lower surface of the object and the other. The guide pin is inserted into the concave hole, and at least one of the guide pin and the concave hole is provided with a tapered portion for guiding the insertion of the guide pin. An object supporting structure, characterized in that the inner surface of the concave hole engaging with the pin and the guide pin has a non-circular horizontal cross-sectional shape. 2. A support structure in which an object is supported on an upper surface of a lower structure via an elastic support, and a guide pin protrudes from one of the lower surface of the elastic support and the upper surface of the lower structure. A concave hole is provided on the other side, the guide pin is inserted into the concave hole, and at least one of the guide pin and the concave hole is provided with a tapered portion for guiding the insertion of the guide pin, The object support structure, wherein the guide pin and the inner surface of the concave hole engaged with the guide pin have a non-circular horizontal cross-sectional shape. 3. A support structure in which an object is supported on an upper surface of a lower structure via an elastic support, wherein a guide pin protrudes from one of the upper surface of the elastic support and the lower surface of the object, and the other end. The guide pin is inserted into the concave hole, and at least one of the guide pin and the concave hole is provided with a tapered portion for guiding the insertion of the guide pin. An auxiliary guide pin is protruded on one of the upper surface of the support body and the lower surface of the object, and an auxiliary concave hole is provided on the other,
The object supporting structure, wherein the auxiliary guide pin is inserted into the auxiliary concave hole. 4. A support structure in which an object is supported on an upper surface of a lower structure via an elastic support, and a guide pin protrudes from one of the lower surface of the elastic support and the upper surface of the lower structure. A concave hole is provided on the other side, the guide pin is inserted into the concave hole, and at least one of the guide pin and the concave hole is provided with a tapered portion for guiding the insertion of the guide pin, An auxiliary guide pin is protruded on one of the lower surface of the elastic bearing member and the upper surface of the lower structure, and an auxiliary concave hole is provided on the other, and the auxiliary guide pin is inserted into the auxiliary concave hole. An object support structure characterized by the following. 5. The object supporting structure according to claim 3, wherein the concave hole and the guide pin have a circular horizontal cross-sectional shape. 6. The structure according to claim 1, wherein the lower structure is a pier, the object is a bridge girder, and the elastic bearing is a laminate of rubber and a metal plate. Characteristic bearing structure.