JP2001003313A - Installation structure of bridge bearing device and installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide installation structure of a bridge bearing device and an installation method capable of easily carrying out work for installing an elastic bearing body to a lower structure, at the same time, acting on an anchor bolt while buffering lateral, abrupt and large impact force and shear force caused by horizontal movement by means of a cylindrical member or a cylindrical impact absorption member and preventing the anchor bolt from large impact force abruptly acting thereon. SOLUTION: This structure is so constituted that an anchor bolt 9 is inserted into an anchor bolt insertion hole 13 of a base plate 5 in an elastic bearing device and that a bridge elastic bearing device is fixed to a lower structure 2 with the anchor bolt 9. In that case, the inside diameter of an anchor bolt insertion hole 1 in the base plate 5 is so formed that it is larger than an outside diameter of a vertical intermediate section of the anchor bolt 9 inserted from an upper side of the anchor bolt insertion hole 13 and embedded in the lower structure 2 to fix, the cylindrical impact absorption member attached anchor bolt 9 fitting and interlocking a cylindrical impact absorption member 10 is inserted into the anchor bolt insertion hole 1 of the base plate 5 and, at the same time, the circumferential surface of the cylindrical impact absorption member 10 is so placed that it approaches the inside circumferential surface of the anchor bolt insertion hole 1 to oppose them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation structure and an installation method of a support device such as a bridge elastic support device for a substructure.

[0002]

2. Description of the Related Art In recent years, according to the revision of the specification for road bridges, in a type B bearing, when a bearing device is designed such that the lifting force is opposed to the lifting force by the adhesion force of an anchor bolt, the lifting force (of the bearing capacity of the bearing device) is considered. It is necessary to largely estimate the lift in design. For this reason, in order to increase the adhesion between the anchor bolt and the concrete of the substructure, a different diameter steel bar (D2
12 to 5D51) or an anchor bolt equivalent thereto, for example, as shown in FIG. 12, the outer diameter of the shaft cross section formed by welding a 6φ steel wire or a rebar in a spiral shape to a normal round steel for anchor becomes large. It becomes necessary to use the anchor bolt 9 (9A) with the spiral rebar 24.

In general, in the case of a bearing device such as a base plate integrated type distributed bearing used for the upper structure 14 such as a pretension type T-shaped girder or a post tension type T-girder, a substructure (lower structure) is used. The structure in which the anchor bolt 9 (9A) to be fixed to the side of the object 2 can be inserted from above the base plate 5 facilitates the installation of the bearing device and allows the transport work to be performed with only the bearing device.
Since the carrying work is facilitated and the carrying and attaching work in a state where the anchor bolt 9 (9A) projecting downward is suspended is not performed, there is an advantage that the space in the vertical direction is reduced, and This has the advantage that the method of mounting the bearing device is simplified. However, as shown in FIG. 10, a step of the type in which the diameter (outer diameter) d of the anchor bolt body 21 is larger than the diameter d1 of the small diameter male screw shaft 8 on the upper part of the anchor bolt 9 (9B) made of different diameter steel bars or the like. When the anchor bolts 9 (9B) are set from the upper side of the base plate 5 by suspending the anchor bolts 9 (9B) using the anchor bolts 9 (9B), or the anchor bolts with the spiral reinforcing bars 24 are suspended and set. If you do, the anchor bolt body 2
1 or the diameter (inner diameter) D of the anchor bolt insertion hole 13 of the base plate 5 than the outer diameter of the shaft section cross section.
In this case, there is a problem that the gap between the small-diameter male screw shaft portion 8 at the upper part of the anchor bolt 9 (9B) and the anchor bolt insertion hole 13 becomes too large.

As described above, when the gap between the anchor bolt insertion hole 13 in the base plate 5 of the bearing device 22 and the anchor bolt 9 (9B) is large, horizontal force due to seismic force acts on the lower structure 2. In the case or when the upper structure 14 supported by the elastic bearing device sheared in the lateral direction is displaced in the lateral direction due to the vibration, the base plate 5 also moves laterally and bears the load of the upper structure on the anchor bolt 9. This is not preferable because a sudden large lateral impact force (shear force) due to the lateral movement of the base plate 5 is applied.

Conventionally, when a bridge bearing device such as a bridge elastic bearing device is installed on a substructure, (1) as shown in FIGS. 7 to 10, an anchor bolt insertion hole 13 in a base plate 5 of the bearing device is used. Anchor bolt body 21 having a diameter (inner diameter) D of anchor bolt 9 (9B)
Is smaller than the outer diameter d of the anchor bolt 9 (9B) from above the base plate 5, the upper end of the anchor bolt 9 is inserted from below the base plate 5, and the anchor bolt 9 (9B) is inserted. ), The nut 12 is screwed into the male screw shaft 8 at the upper end, and the entire bearing device 22 is lifted and conveyed to a predetermined installation position with the anchor bolt 9 (9B) suspended from the base plate 5. (2) As shown in FIG. 12, when the anchor bolt 9 (9A) with the spiral rebar 24 is set from above the base plate 5, with respect to the bolt shaft diameter d1 of the anchor bolt 9 (9A), The outer diameter dimension d3 of the shaft portion cross section becomes larger, and the dimension D of the anchor bolt insertion hole 13 of the base plate 5 needs to be further larger than the outer diameter dimension d3. Otherwise, after the base plate 5 is installed, it is not possible to perform post-installation by inserting the anchor bolt 9 (9A) into the base plate 5. When the dimension D of the anchor bolt insertion hole of the base plate 5 is set large, the steel washer 11 fitted to the anchor bolt 9 (9A) is attached to the base plate 5 with respect to the steel washer 11 as shown in FIG. It is necessary to weld almost the entire circumference 25, and the gap between the anchor bolt insertion hole 13 of the base plate 5 and the bolt shaft (male screw shaft 8) of the anchor bolt 9 (9A) becomes relatively large. There is.

[0006]

In the case of the prior art (1), the anchor bolt 9 is provided from above the base plate 5.
(9B) cannot be inserted, the upper end of the anchor bolt 9 (9B) is inserted from below the base plate 5, and the nut 12 is inserted into the upper end of the anchor bolt 9 (9B).
Are screwed together, and the entire support device 22 is lifted and conveyed to a predetermined installation position in a state where the anchor bolt 9 (9B) is hung on the base plate 5, so that the anchor bolt 9 (9B) hung downward ) Collides with the lower structure 2 or the like during the transportation, and the anchor bolt 9 (9)
B) or the lower structure 2 may be damaged, or may collide with the lower structure 2 and fall out of the base plate 5 during the downward conveyance, thereby damaging the rubber layer 23 of the bearing device 22. In addition, anchor bolt 9 (9
B) must be conveyed in a state of being suspended from the base plate 5, so if the anchor bolts 9 (9B) have a large vertical dimension as in the state of being suspended from the base plate 5, a large space is required accordingly. Needed. In the case of (2), since it is necessary to weld the entire circumference of the steel washer 11, the welding operation of the welded portion is complicated, and the rubber portion of the bearing is not affected by the adverse effect of the welding heat. As described above, it is necessary to keep a relatively large distance from the washer welded portion 11, and it is necessary to perform a high level of skill in the welding operation, and since these operations are performed on site, the construction cost is high. Problem.

According to the present invention, it is not necessary to transport the anchor bolts 9 suspended from the base plate 5 of the elastic support 4, and after the elastic support 4 is transported and arranged, the cylindrical member or the cylindrical shock absorber is absorbed. The anchor bolt 9 with the cylindrical shock absorbing material, into which the material is fitted and locked, is attached to the base plate 5 of the elastic support 4.
, The work of mounting the elastic bearing member 4 on the lower structure 2 can be easily performed, and when a horizontal force due to seismic force acts on the lower structure 2 or in a lateral direction. When the upper structure 14 supported by the elastic bearing member which has been sheared and deformed in the lateral direction is displaced in the lateral direction due to the vibration, the sudden and large impact force and shear force in the lateral direction due to the lateral movement of the base plate 5 cause the cylindrical member or the cylindrical member to move. It is intended to act on the anchor bolt 9 while being buffered by the shock-absorbing material, and to prevent a sudden large impact force from acting on the anchor bolt 9.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, in an installation structure of a bridge bearing device according to a first aspect of the present invention, an anchor bolt of a base plate is inserted into an elastic bearing body integrally provided with a base plate. In an installation structure of a bridge bearing device in which an anchor bolt is inserted into a through hole and an elastic bearing is fixed to a lower structure by the anchor bolt, the inner diameter of the anchor bolt insertion hole in the base plate is determined by inserting the anchor bolt into the through hole. An anchor bolt with a cylindrical member, which is formed to be larger than the outer diameter of the shaft cross-sectional area of the anchor bolt that is inserted from the upper side of the through hole and embedded and fixed in the concrete lower structure, and the cylindrical member is fitted and locked, While being inserted into the anchor bolt insertion hole of the base plate, the outer peripheral surface of the tubular member is Characterized in that in proximity to the inner peripheral surface of the Nkaboruto insertion holes are arranged so as to face.

According to a second aspect of the present invention, in the installation structure of the bridge support device according to the first aspect, the tubular member is more rigid than a polymer material such as urethane rubber, hard rubber, or synthetic resin, or an anchor bolt. Characterized in that it is a cylindrical shock absorber made of a metal material having a low hardness.

According to the third aspect of the present invention, the anchor bolt is inserted into the anchor bolt insertion hole of the base plate of the elastic support body integrally provided with the base plate, and the lower part of the anchor bolt is inserted into the lower structure. In the installation method of the bridge bearing device, the inner diameter of the anchor bolt insertion hole in the base plate is inserted from above the anchor bolt insertion hole and embedded and fixed in the concrete lower structure. An anchor bolt with a tubular member, which is formed larger than the outer diameter of the shaft cross section of the anchor bolt and the bridge support device is arranged at a predetermined level of the lower structure, and then the tubular member is fitted and latched. The outer peripheral surface of the tubular member is inserted into the anchor bolt insertion hole of the base plate to fix the anchor. It is arranged so as to be close to and opposed to the inner peripheral surface of the bolt insertion hole, suspended and locked above the base plate, and the lower part of the anchor bolt is arranged in an anchor bolt storage recess in the lower structure. Then, concrete is filled into the anchor bolt storage recess so as to bury the lower portion of the anchor bolt, and the concrete is hardened.

According to a fourth aspect of the present invention, in the method for mounting a bridge support device according to the third aspect, the tubular member is more rigid than a polymer material such as urethane rubber, hard rubber, or synthetic resin, or an anchor bolt. Characterized in that it is a cylindrical shock absorber made of a metal material having a low hardness.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 4 are explanatory views for explaining an installation procedure of an elastic bearing device for a bridge integrally provided with a base plate 5 according to the present invention, and show an embodiment of an installation structure. First, as shown in FIG. 1, a plurality of anchor bolt insertion recesses 1 are placed on the upper part of a concrete lower structure 2 such as a bridge pier or an abutment so as to be located at four corners of a plane rectangle by box removal or the like.
And the upper surface 3 of the concrete substructure 2
A plurality of steel height adjustment liner plates 6 are arranged (for example, at four locations) between the anchor bolt insertion recesses 1 in the front-rear and left-right directions, and a rubber-like elastic layer 4a is provided at an intermediate portion. The base plate 5 of the elastic support 4 having the upper metal plate 18 integrally on the upper surface of the elastic support 4 and the steel base plate 5 on the lower surface of the elastic layer 4a is integrated with the plurality of height adjusting liner plates 6.
Place over.

Next, as shown in FIG. 2, a polymer material such as urethane rubber, hard rubber or synthetic resin is previously hollowed on an upper part of an anchor bolt 9 having a male screw shaft portion 8 at an upper end portion of a different diameter steel bar 7. A tubular shock absorbing material 10 having a buffering action and formed in a tubular shape is fitted and locked, and a steel washer 11 is placed on the upper end of the shock absorbing material 10. Nut 12 is attached to anchor bolt 9
Screwed into the male screw shaft 8. Next, the anchor bolt 9 with the shock absorbing material 10 in this state is inserted into the anchor bolt insertion hole 13 from above the base plate 5, and a steel having an outer diameter larger than the anchor bolt insertion hole 13 above the base plate 5. The washer 11 is locked. In this embodiment, the vertical dimension of the cylindrical shock absorber 10 is set to be longer than the vertical dimension (plate thickness) of the anchor bolt insertion hole 13 in the base plate 5. The gap between the cylindrical shock absorber 10 and the anchor bolt insertion hole 13 is approximately 0 mm on one side.
It is set to 1.5 mm. With such a gap, a relatively large gap between the cylindrical shock absorbing material 10 and the anchor bolt insertion hole 13 is filled to eliminate rattling, and the horizontal force can be transmitted reliably. Therefore, when the upper structure moves due to horizontal force such as an earthquake,
Alternatively, when the base plate 5 is displaced in the lateral direction when the upper structure returns to the original state from the state in which the rubber layer in the elastic bearing device is sheared (the state in which the upper structure is also moving), the anchor bolts in the base plate 5 are used. The inner surface of the insertion hole 13 abuts against the shock absorbing material 10, and the anchor bolt 9 bears a horizontal force while being buffered by the shock absorbing material 10. Does not come.

Next, as shown in FIG. 3, the anchor bolts 9 with the shock absorbing material 10 are inserted into all the anchor bolt insertion holes 13 in the elastic support 4 from above the base plate 5, and the anchor bolts 9 are made of steel. The base plate 5 is suspended and supported by the washer 11 and the nut 12, and the lower part of the anchor bolt 9 is arranged at a predetermined position in the anchor bolt insertion recess 1. Next, as shown by a two-dot chain line in FIGS. 2 and 3, an upper structure 14 such as a T-shaped T-shaped cross section is erected on the upper portion of the elastic bearing body 4, and as shown in FIG. The steel lower shoe 17 of the object 14 and the upper metal plate 18 of the elastic support 4 are fixed with bolts 19, and the formwork 15 is disposed on the upper surface 3 of the lower structure 2 around the base plate 5.

Next, as shown in FIG. 4, a hardening adhesive or concrete 16 is poured so as to bury the anchor bolt insertion recess 1 and the lower portion of the base plate 5.
The anchor bolt 9 is embedded and fixed. Then, after the hardened adhesive or concrete 16 has hardened, the nut 1
2 to tighten the bridge support device 22
Is firmly installed and fixed to the lower structure 2.

In the above embodiment, since the inner diameter of the cylindrical shock absorbing material 10 is smaller than the shaft diameter (outer shape) of the portion to be fitted to the anchor bolt 9, it is small enough to be able to be inserted and locked therein. There is no danger that the shock absorber 10 will be displaced from the mounting position of the anchor bolt 9. In addition, cylindrical shock absorber 1
Since the lower end of the anchor bolt 9 is disposed so as to rest on the annular upper surface 23 of the upper surface of the large-diameter shaft portion of the anchor bolt 9,
There is no possibility that the cylindrical shock absorber 10 is displaced downward.

FIG. 6 shows another modification of the anchor bolt 9 having a cylindrical shock absorber used in the present invention. In this embodiment, the anchor bolt 9 is composed of a lower anchor bolt 9A and an upper anchor bolt 9A. 9B and a steel coupler 20 connecting them. That is, the lower part of the coupler 20 made of a steel female screw cylinder is screwed and connected to the male screw shaft 8 at the upper end of the lower anchor bolt 9A, and the head 21A of the upper anchor bolt 9B.
The upper end of the cylindrical shock absorber 10 is in contact with the lower surface of the steel washer 11 while the large diameter steel spring washer or steel washer 11 is in contact with the lower surface of Absorbent 1
0 is fitted and locked so that the inner surface of the cylindrical shock absorber 10 is pressed against the intermediate shaft portion of the upper anchor bolt 9B.
The lower male screw portion 21B of the upper anchor bolt 9B is screwed and connected to the coupler 20. In the case of this embodiment, the outer diameter of the coupler 20 is set smaller than the outer diameter of the cylindrical shock absorber 10, so that it is inserted from above the base plate 5 and The bolt 9 can be suspended and locked. Since other configurations are the same as those of the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.

FIG. 7 shows another modification using the anchor bolt 9 with a cylindrical shock absorbing material having a cushioning function used in the present invention.
The cylindrical part 11b of the flanged washer 11A having the cylindrical part 11b having substantially the same diameter as the anchor bolt insertion hole 13 is fitted over the main body part of the anchor bolt 9 and the male screw shaft part 8, and the flange is provided. Washer 1
The lower surface of the upper flange 11c in 1A is placed on the upper surface of the base plate 5, and the anchor bolt 9 with a cylindrical shock absorber is installed at a predetermined level. The flanged washer 11A is preferably made of a metal material having a rigidity lower than the rigidity of the anchor bolt 9, such as extremely mild steel and low yield point steel. Note that other configurations are the same as those of the above-described embodiment.
The same reference numerals are given and the description is omitted.

In practicing the present invention, as a cylindrical shock absorbing material having a buffering action, a polymer material such as urethane rubber, hard rubber or synthetic resin having a rigidity smaller than the rigidity of the anchor bolt 9 or extremely mild steel, It is preferable to use a member having an energy absorbing function such as a metal material such as a yield point steel. Further, a turning tool engaging portion may be provided on the head of the steel anchor bolt 9.

As in the above-described embodiment, the width of the upper steel plate 18 is adjusted to the anchor bolt insertion hole 13 of the base plate 5.
If it is smaller than the dimension between the cylindrical shock absorbers 10
The attached upper anchor bolt 9 can be easily arranged from above. Since the upper anchor bolt 9B with the cylindrical shock absorber 10 is carried in from the upper side, only the width of the upper steel plate 18 may be reduced.

[0021]

According to the present invention, an anchor bolt is inserted into an anchor bolt insertion hole of a base plate of an elastic bearing, and the elastic bearing for a bridge is fixed to a substructure by the anchor bolt. In the installation structure of the device, the inner diameter of the anchor bolt insertion hole in the base plate is the outer diameter of the cross section of the shaft portion of the anchor bolt that is inserted from above the anchor bolt insertion hole and embedded and fixed in the concrete lower structure. Formed larger than the dimensions, and a substantially cylindrical member or a tubular member or a tubular shock absorbing material anchor bolt fitted with a tubular shock absorbing material is inserted into the anchor bolt insertion hole of the base plate, The outer peripheral surface of the cylindrical member or the cylindrical shock absorbing material is close to the inner peripheral surface of the anchor bolt insertion hole. When the horizontal force due to the seismic force acts on the lower structure 2, or the upper structure 14 supported by the elastic bearing device sheared in the horizontal direction moves in the lateral direction due to the vibration. When the base plate 5 is displaced, a large lateral impact force and shear force due to the lateral movement of the base plate 5 are applied to the anchor bolt 9 while being buffered by a tubular member or a tubular shock absorber having a rigidity smaller than that of the anchor bolt such as urethane. Since it acts, it is possible to prevent a sudden large impact force from acting on the anchor bolt 9.

Further, a bridge support device is provided in which an anchor bolt is inserted into an anchor bolt insertion hole in a base plate of the bridge support device, and a lower portion of the anchor bolt is embedded and fixed in a lower structure. In the installation method, the inner diameter of the anchor bolt insertion hole in the base plate is larger than the axial cross-sectional outer diameter of the shaft portion of the anchor bolt inserted from above the anchor bolt insertion hole and embedded and fixed in the concrete lower structure. After the bridge bearing device is arranged at a predetermined level of the lower structure, an anchor bolt with a shock absorbing material such as a tubular member or a tubular member in which a tubular shock absorbing material is fitted and locked is formed. Insert the outer peripheral surface of the cylindrical member or the cylindrical shock absorbing material into the anchor bolt insertion hole of the base plate so as to be forward. It is arranged so as to be close to and opposed to the inner peripheral surface of the anchor bolt insertion hole, suspended and locked on the upper side of the base plate, and the lower part of the anchor bolt is arranged in the anchor bolt storage recess in the lower structure. Then, concrete is filled into the anchor bolt storage recess and hardened so as to bury the lower part of the anchor bolt, so that it is not necessary to suspend and transport the anchor bolt 9B to the bearing device as in the related art. There is no danger that the anchor bolt 9 collides with the lower structure 2 and comes out of the base plate 5 to damage the rubber layer 23 of the bearing device 22. Further, since the anchor bolts 9 are not conveyed while being suspended from the base plate 5, the elastic support 4 is suspended and conveyed in a large vertical state such as when the anchor bolts 9 are suspended from the base plate 5. Can be easily carried out, and the tubular member or the tubular anchor bolt 9 with a shock-absorbing material can be suspended from the base plate 5 in a state where the bearing device is temporarily installed on the lower structure 2. Since the locking is performed by lowering, the level of the cylindrical member or the anchor bolt 9 with the cylindrical shock absorbing material can be relatively easily adjusted and arranged at an accurate position.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an installation process of an elastic bearing device for a bridge according to the present invention.

FIG. 2 is a vertical sectional front view showing a state in which an anchor bolt is suspended from a base plate of an elastic bearing body.

FIG. 3 is a longitudinal sectional front view showing a state in which an elastic bearing and an anchor bolt are arranged at a predetermined level of a lower structure.

FIG. 4 is a longitudinal sectional front view showing a state in which an elastic bearing body is installed at a predetermined level of a lower structure.

5 is a partially longitudinal front view showing a part of FIG. 4 in an enlarged manner.

FIG. 6 is a partially longitudinal front view showing a state in which an anchor bolt according to another embodiment that can be used in the present invention is suspended and locked on a base plate.

FIG. 7 is a partially longitudinal front view showing a state in which an anchor bolt of still another embodiment that can be used in the present invention is suspended and locked on a base plate.

FIG. 8 is a vertical sectional front view showing a process of installing a conventional elastic bearing for a bridge.

FIG. 9 is a longitudinal sectional front view showing a state in which a conventional elastic bearing for a bridge is suspended and conveyed by a crane or the like.

FIG. 10 is a longitudinal sectional front view showing a part of FIG. 8 in an enlarged manner.

FIG. 11 is a longitudinal sectional front view showing a state in which an anchor bolt is suspended and locked on a base plate of an elastic bearing body and is arranged at a predetermined level of a lower structure.

FIG. 12 is a vertical sectional front view showing a relationship between a conventional anchor bolt and an anchor bolt insertion hole in a base plate.

FIG. 13 is a longitudinal sectional front view showing a part of a state where a conventional anchor bolt is suspended and locked on a base plate and is arranged at a predetermined level of a lower structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 recess for anchor bolt insertion 2 lower structure 3 upper surface 4 elastic bearing 5 base plate 6 height adjustment liner plate 7 bar rod of different diameter 8 male screw shaft 9 anchor bolt 10 shock absorber 11 steel washer 12 nut 13 anchor bolt insertion Passage hole 14 Upper structure 15 Formwork 16 Concrete 17 Steel lower shoe 18 Upper metal plate 19 Bolt 20 Coupler 21 Anchor bolt main body 22 Bearing device 23 Annular upper surface of large diameter shaft portion 24 Spiral rebar 25 Welding

Claims (4)

[Claims] In an elastic bearing body integrally provided with a base plate, an anchor bolt insertion hole of the base plate is provided.
In an installation structure of a bridge support device in which an anchor bolt is inserted and an elastic bearing body is fixed to a lower structure by the anchor bolt, an inner diameter of the anchor bolt insertion hole in the base plate is set to an upper side of the anchor bolt insertion hole. The anchor bolt with a tubular member is formed so as to be larger than the outer diameter of the cross section of the shaft portion of the anchor bolt inserted and fixed to the concrete lower structure, and the tubular member is fitted and latched with a substantially tubular member. A bridge support device which is inserted into an anchor bolt insertion hole and is arranged so that an outer peripheral surface of the tubular member is close to and opposed to an inner peripheral surface of the anchor bolt insertion hole. Installation structure. 2. The cylindrical member is a cylindrical shock absorber made of a polymer material such as urethane rubber, hard rubber or synthetic resin, or a metal material having a lower rigidity than the anchor bolt. An installation structure of the bridge bearing device according to claim 1. 3. An anchor bolt insertion hole in a base plate of an elastic bearing body integrally provided with a base plate,
In a method for installing a bridge bearing device in which an anchor bolt is inserted and a lower portion of the anchor bolt is embedded and fixed in a lower structure, an inner diameter of an anchor bolt insertion hole in the base plate is set to the anchor bolt insertion hole. An anchor bolt that is inserted from the upper side of the passage hole and is embedded and fixed in the concrete lower structure is formed to be larger than the outer diameter of the cross section of the shaft of the anchor bolt, and after the elastic bearing body is arranged at a predetermined level of the lower structure An anchor bolt with a cylindrical member having a substantially cylindrical member fitted and locked therein is inserted into an anchor bolt insertion hole of the base plate so that the outer peripheral surface of the cylindrical member is close to the inner peripheral surface of the anchor bolt insertion hole. At the top of the base plate, and suspended above the base plate, and A lower part of the anchor structure is disposed in an anchor bolt storage recess of the lower structure, and then the anchor bolt storage recess is filled with concrete and cured so as to bury the lower part of the anchor bolt. Installation method. 4. The cylindrical member is a cylindrical shock absorber made of a polymer material such as urethane rubber, hard rubber or synthetic resin, or a metal material having a lower rigidity than the anchor bolt. 3. The method for installing a bridge bearing device according to item 3.