JPH10245812A - Material body bearing construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ease a positioning accuracy of a bearing body and to provide a material body bearing construction capable of being easily executed. SOLUTION: A pedestal 2 is monolithically provided to a pier upper surface 1 with concrete, a base plate 3 is mounted on the pedestal 2, and the base plate 3 is fixed with anchor bolts 4. A lower flange 6 of a bearing body 5 is fixed to the base plate 3 with bolts 7. In order to carry out execution of work for mounting a girder 13 on the pier, the bearing body 5 is fixed to the base plate 3 with the bolts 7. (The base plate 3 is fixed to the pedestal 2 with the bolts 4 in advance). Then, the girder 13 is lowered down to the bearing body 5 and is fixed with bolts 20.

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 in 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 pre-installation, it is necessary to position the bearing 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 has as its object to provide an object support structure in which the positioning accuracy of a support body is relaxed and 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.

In such an object supporting structure, when an object is loaded on an elastic bearing mounted on a 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.

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.

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 the present invention, it is preferable that 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.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1A is a configuration diagram of the object support structure according to the embodiment in a direction perpendicular to the bridge axis, FIG. 1B is an enlarged view of the vicinity of the concave hole in FIG. 1A, and FIG. 2 is an embodiment. Fig. 3 (a) to 3 (a) are structural diagrams of the object bearing structure in the bridge axis direction according to
(C) is a construction process diagram in the bridge axis direction of the object bearing structure according to the embodiment, and FIGS. 4 (a) to (d) are cross-sectional views showing an engagement relationship between a guide pin and a guide hole during construction. .
1 (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. This guide pin 11
The lower half is a columnar portion 11b, and the upper half is a tapered portion (truncated conical portion) 11a having a smaller diameter as it goes upward.

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 a lower surface of an end in the bridge axis direction 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 in the lower half and a straight cylindrical hole 17b in the upper half. The tapered portion 17a has a tapered shape having a larger diameter as it goes downward. A concave portion 18 is provided in the concrete portion above the opening 17, and a concave hole 19 is formed by the opening 17 and the concave portion 18. In addition,
Reference numeral 18a denotes a metal casing surrounding the concave portion 18.

In order 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.

The lower half 1 of the columnar shape of the guide pin 11 is soon formed.
1b matches the straight cylindrical 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.

The upper flange 8 is provided with a bolt insertion hole in advance, the plate 15 is provided with a female screw hole, and the bolt 20 is screwed into the female screw hole.

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, the beam 13 can be placed on the support body 5 while being aligned and firmly connected to each other. If the center of the guide pin 11 is displaced from the center of the opening 17, the guide pin 11 shifts toward the center of the opening 17, causing distortion in the support member 5. Is not enough to affect.

In the above embodiment, the guide pin 11
Is provided on the upper flange 8 of the support body 5 and the concave hole 19 is provided on the spar 13.
May be provided on the support body 5. However, in order to prevent the guide pins 11 from being damaged during transportation or during construction standby, the guide pins 11 are preferably provided on the support body 5.

In the above embodiment, the support 5 is mounted on the pedestal 2 first, but the support 5 may be mounted on the lower surface of the girder 13 in advance. In this case, the lower flange 6 is provided with the guide pin 11 or the concave hole 19, and the base plate 3 is provided with the concave hole 19 or the guide pin 11. Even in this way, the guide pin 1 of the support 5
Girder 1 while matching the center of 1 with the center of opening 17
3 can be mounted on the pier, the positioning accuracy of the base plate 2 can be eased, and the spar 1
The positioning accuracy with respect to 3 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 as shown in the figure.

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.

[0027]

As described above, according to the object support structure of the present invention, when the object is supported via the elastic support, the positioning accuracy of the support and the like is reduced, and the work is extremely simple. Will be able to do it.

The 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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge pier top 2 Pedestal 3 Base plate 5 Elastic bearing 6 Lower flange 8 Upper flange 11 Guide pin 11a Tapered part 13 Bridge girder 15 Plate 17 Opening 17a Tapered part 18 Recess 19 Concave hole

Claims (3)

[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. Object bearing structure. 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. An object support structure characterized by the following. 3. The bearing structure according to claim 1, wherein 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. .