JPH07252806A - Bearing method of preslide type bridge birder - Google Patents

Abstract

PURPOSE:To obtain a bearing method of a preslide type bridge girder which is firm against the extending or contracting movement of the bridge girder. CONSTITUTION:A lower slide plate is fixed on the upper face of an upper metallic plate 2 fixed on the upper face of a rubber layer and an upper slide plate is fixed at the lower face of a metallic support plate 4 arranged thereon. And the metallic support plate 4 is fixed at the lower part of a steel soleplate 7 fixed at the lower part of a bridge girder 6. A non-slip member 10 is fitted to extend over the fitting holes provided above the metallic support plate 4 and the fitting holes below the steel soleplate 7 to fix the lower metallic plate 11 fixed at the underface of the rubber layer 1 to the lower structure 12. And the upper part of a prevent, ive metal tool 13 against shearing breakage of the rubber layer, fixed at the lower metallic plate 11, is detachably fixed to the upper metallic plate 2. Next, after the upper slide plate has been slid and transferred on the lower slide plate by the longitudinal movement of the bridge girder, the upper metallic plate is fixed not to move against the metallic support plate and then the preventive metal tool against the shearing breakage of the rubber layer is released from the connection with the upper metallic plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when constructing a structure such as a steel bridge girder or a concrete bridge girder, slides a rubber bearing for a structure bearing while preventing shear deformation of a rubber layer in the rubber bearing. The present invention relates to a pre-slide type bridge girder bearing method for moving and installing.

[0002]

2. Description of the Related Art Conventionally, when constructing a structure such as a concrete bridge girder, as a method of installing a rubber bearing for a structure bearing by sliding it while preventing shear deformation of a rubber layer in the rubber bearing. The method disclosed in Japanese Patent Publication No. 4-9882 is known.

[0003]

In the case of the above-mentioned conventional slide type bridge girder support device, elongated holes extending in the front-rear direction are provided at the four corners of the movable supporting board, and the left and right sides of each elongated hole are arranged in the left-right direction. Since it is necessary to provide a large number of locking teeth extending to the bottom of the fixed member and engaging teeth at the bottom of the fixed member, the structure is complicated. Since the upper part of the bearing is fitted in the concave part of the upper support plate, the mounting strength of the rubber bearing is weak, and the upper and lower fitting parts of the rubber bearing cannot be sheared. However, there is a drawback that it cannot be sheared.

[0004]

In order to advantageously solve the above-mentioned problems, in the pre-sliding type bridge girder bearing method of the present invention, the upper metal plate 2 fixed to the upper surface of the rubber layer 1 has a lower portion on the upper surface thereof. The sliding plate 3 is fixed, and the upper sliding plate 5 is fixed to the lower surface of the metal supporting plate 4 arranged on the upper part of the lower sliding plate 3, and the steel sole plate 7 fixed to the lower part of the bridge girder 6 is fixed. The metal support plate 4 is fixed to the lower part, and the metal support plate 4 slides over a fitting hole 8 provided on the upper side of the metal support plate 4 and a fitting hole 9 provided on the lower side of the steel sole plate 7. A lower metal plate 11 fitted with a prevention member 10 and fixed to the lower surface of the rubber layer 1 is fixed to a lower structure 12, and a lower portion of the lower metal plate 11 is detachably fixed to the rubber layer shearing. The upper part of the prevention fitting 13 is detachably connected to the upper metal plate 2, The longitudinal movement of the bridge girder 6,
After sliding the upper slide plate 5 over the lower slide plate 3, the upper metal plate 2 is fixed so as not to move with respect to the metal supporting plate 4, and then the rubber layer shearing prevention metal 13 and the upper part are fixed. The connection with the metal plate 2 is released.

[0005]

1 to 4 show a first step of a pre-sliding type bridge girder supporting method according to an embodiment of the present invention, in which a plurality of metal plates are embedded and fixed at intervals in the vertical direction. The upper metal plate 2 is fixed to the upper surface of the rubber layer 1 having 15 and the lower slide plate 3 made of a tetrafluoroethylene plate is integrally fixed to the upper surface of the upper metal plate 2, and the lower slide plate 3 An upper slide plate 5 made of a stainless steel plate is fixed to the lower surface of the metal support plate 4 arranged on the upper side with an adhesive, and the upper slide plate 5 is slidable in the longitudinal direction of the bridge girder 6 with respect to the lower slide plate 3. The steel sole plate 7 is abutted and fixed to the lower surface of the lower flange 14 of the bridge girder 6 by welding.

A circular fitting hole 8 is provided above the central portion of the metal support plate 4, and a circular fitting hole 9 is provided below the central portion of the steel sole plate 7. A slip prevention member 10 made of a metal disk is fitted over the fitting holes 8 and 9, and a lower slide plate 3 fixed to the upper surface of the upper metal plate 2 is attached to the lower surface of the metal support plate 4. The upper slide plate 5 fixed to the metal support plate 4 is placed thereon, the projecting portions 16 are provided on the front and rear portions of the left and right sides of the metal support plate 4, and the front and lower rear end portions of the metal support plate 4 are A plurality of connecting bolts 19 are respectively inserted into through holes 18 for bolt insertion which are provided with the stopper protrusions 17 and extend over the front and rear ends of the metal supporting plate 4 and the stopper protrusions 17. The connecting bolt 19 is attached to the steel sole plate 7. It is screwed into eclipsed the female screw hole 20.

A lower metal plate 11 is integrally fixed to the lower surface of the rubber layer 1, and anchor bolts 21 are inserted into the left and right sides of the lower metal plate 11, that is, the front and rear portions on both sides in the width direction of the bridge girder 6, The anchor bolt 21 protruding from the lower surface of the lower metal plate 11 is embedded in the lower structure 12, and a nut 22 for fixing the lower metal plate 11 is screwed onto the upper portion of the anchor bolt 21.

Rubber layer shearing preventive metal fittings 13 are mounted on the middle portions of the left and right sides of the lower metal plate 11 and fixed by a plurality of bolts 23, and inserted into the upper part of the rubber layer shearing preventive metal fittings 13. Multiple connecting bolts 2
4 is screwed into a female screw hole 25 provided in the upper metal plate 2.

When the concrete pavement material placed on the upper portion of the bridge girder 6 is dried and shrunk in the above-described state, the rubber layer 1 between the upper metal plate 2 and the lower metal plate 11 becomes Since the rubber layer shearing preventive metal 13 and the bolts 23 and the connecting bolts 24 are held so as not to perform shear deformation, the bridge girders 6 will be dried and contracted by the pavement material of the bridge girders 6 as shown in FIGS. And a steel sole plate 7, a metal support plate 4, and an upper slide plate 5 fixed to the lower slide plate 3 fixed to the upper surface of the upper metal plate 2.
Slide over. 5 and 6 show a state in which the movement of the steel sole plate 7, the metal support plate 4, and the upper slide plate 5 fixed to the bridge girder 6 has been completed due to the drying shrinkage of the pavement material on the bridge girder 6. There is.

Next, as shown in FIGS. 7 to 9, a spacer body 26 and a spacer accommodating cover 27 are provided between the stopper protrusions 17 and the front and rear ends of the upper metal plate 2.
And a clip 29 is abutted on the lower surface of the spacer 28, and the clip 29, the front end portion and the rear end portion of the metal supporting plate 4, and the stopper projection 17 are inserted. The connecting bolt 19 has a female screw hole 2 formed in the steel sole plate 7.
It is screwed to 0.

10 to 14 show a spacer accommodating cover 27 and a spacer body 26 used in an embodiment of the present invention. The spacer accommodating cover 27 includes a plate body 30 and a longitudinal direction thereof. The spacer main body 26 is accommodated in the spacer accommodating cover 27 to constitute a spacer 28. The stopper 31 is fixed to both ends of the spacer 31 and a plurality of through holes 32 for inserting bolts.

From the state shown in FIGS. 7 to 9, the rubber layer shearing prevention metal fitting 13 may be removed, or the rubber layer shearing prevention metal fitting 13 may not be removed and the protrusions provided on the front, rear, left and right sides of the metal support plate 4 may be removed. A movement restricting device may be provided between the portion 16 and the shearing prevention fitting 13.

[0013]

According to the present invention, the lower slide plate 3 is fixed to the upper surface of the upper metal plate 2 fixed to the upper surface of the rubber layer 1,
An upper slide plate 5 is fixed to the lower surface of a metal support plate 4 arranged above the lower slide plate 3, and the metal support plate is attached to the lower part of a steel sole plate 7 fixed to the lower part of a bridge girder 6. The plate 4 is fixed, and the anti-slip member 10 is fitted over the fitting hole 8 provided on the upper side of the metal supporting plate 4 and the fitting hole 9 provided on the lower side of the steel sole plate 7. The lower metal plate 11 fixed to the lower surface of the rubber layer 1 is fixed to the lower structure 12, and the upper portion of the rubber layer shearing prevention metal fitting 13 whose lower part is detachably fixed to the lower metal plate 11, Removably fixed to the upper metal plate 2 and then bridge girder 6
By moving the upper slide plate 5 to the lower slide plate 3 in the longitudinal direction of
After sliding on, the upper metal plate 2 is fixed so as not to move with respect to the metal support plate 4, and then the coupling between the rubber layer shearing prevention fitting 13 and the upper metal plate 2 is released. Therefore, the structure is simple and can be manufactured at low cost. Since the upper metal plate 2 is fixed to the upper surface of the rubber layer 1 and the lower metal plate 11 is fixed to the lower surface of the rubber layer 1, the rubber layer 1 can be effectively used, and slides over the fitting hole 8 provided on the upper side of the metal supporting plate 4 and the fitting hole 9 provided on the lower side of the steel sole plate 7. Since the prevention member 10 is fitted, the metal support plate 4
And the steel sole plate 7 can be strongly prevented from sliding, and therefore, a low-strength means can be adopted as a means for connecting the metal support plate 4 and the steel sole plate 7.

[Brief description of drawings]

FIG. 1 is a side view showing a first step of a pre-slide type bridge girder bearing method according to an embodiment of the present invention.

FIG. 2 is a side view showing a part of FIG. 1 in an enlarged manner.

FIG. 3 is a vertical cross-sectional side view showing a rubber bearing having a plurality of metal plates between an upper metal plate and a lower metal plate.

FIG. 4 is a vertical cross-sectional side view showing a state in which an upper slide plate fixed to a lower surface of a metal supporting plate is placed on a lower slide plate fixed to an upper surface of an upper metal plate.

FIG. 5 is a side view showing a second step in which the bridge girder, the steel sole plate fixed to the bridge girder, the metal support plate, and the upper slide plate slide on the lower slide plate.

FIG. 6 is a partially cutaway side view showing a part of FIG. 5 in an enlarged manner.

FIG. 7 is a side view showing a third step in which an upper metal plate is fixed to a metal support plate via a spacer.

8 is a partially cutaway side view showing a part of FIG. 7 in an enlarged manner.

FIG. 9 is an enlarged side view showing an upper left side portion of FIG.

FIG. 10 is a bottom view showing the spacer storage cover.

FIG. 11 is a front view showing a spacer storage cover.

FIG. 12 is a side view showing a spacer storage cover.

FIG. 13 is a plan view showing a spacer body.

FIG. 14 is a front view showing a spacer body.

[Explanation of symbols]

 1 Rubber Layer 2 Upper Metal Plate 3 Lower Sliding Plate 4 Metal Support Plate 5 Upper Sliding Plate 6 Bridge Girder 7 Steel Sole Plate 8 Fitting Hole 9 Fitting Hole 10 Anti-Slip Member 11 Lower Metal Plate 12 Lower Structure 13 Rubber Layer Anti-shear fitting 14 Steel lower flange 15 Metal plate 16 Projection 17 Stopper protrusion 18 Bolt insertion through hole 19 Connection bolt 20 Female screw hole 21 Anchor bolt 22 Nut 23 Bolt 24 Coupling bolt 25 Female screw hole 26 Spacer body 27 Spacer Storage cover 28 Spacer 29 Clip 30 Plate 31 Stopper 32 Bolt insertion hole

Claims (1)

[Claims] 1. A lower slide plate 3 is fixed to the upper surface of an upper metal plate 2 fixed to the upper surface of a rubber layer 1, and the lower slide plate 3 is fixed.
An upper slide plate 5 is fixed to the lower surface of the metal support plate 4 arranged on the upper part of the bridge, and the metal support plate 4 is fixed to the lower part of the steel sole plate 7 fixed to the lower part of the bridge girder 6. ,
The slip prevention member 10 is fitted over the fitting hole 8 provided on the upper side of the metal support plate 4 and the fitting hole 9 provided on the lower side of the steel sole plate 7, and the rubber layer 1 The lower metal plate 11 fixed to the lower surface is fixed to the lower structure 12, and the upper part of the rubber layer shearing prevention metal 13 whose lower part is detachably fixed to the lower metal plate 11 is attached to the upper metal plate 2. After being detachably fixed, the longitudinal movement of the bridge girder 6 causes the upper slide plate 5 to slide over the lower slide plate 3, and then the upper metal plate 2 is not moved with respect to the metal support plate 4. Pre-slide type bridge girder bearing method for fixing the rubber layer shearing prevention metal fitting 13 and the upper metal plate 2