JPH07216825A - Movement limiting device for bridge girder movable end - Google Patents

Abstract

PURPOSE:To prevent the generation of dislocation to a slip-off stopper even when the slip-off stopper receives the vibration of vehicles traveling on a bridge girder. CONSTITUTION:A laterally extended slip-off stopper 2 is integrally provided in line with the center upper part of a lower supporting member 1 through a supporting shaft 3. The supporting shaft 3 is fitted in the longitudinally movable state to an upper supporting member 4, and the upper supporting member 4 is provided with stopper supporting parts 5 positioned at the lower parts of both lateral ends of the slip-off stopper 2. In the state of a spacer 6 being interposed between the lower and upper supporting members 1, 4, the lower and upper supporting members 1, 4 are connected to each other by bolts 7, and the lower supporting member 1 is fixed to a lower structure 8. Longitudinally extended girder concrete 9 is then placed, and after the hardening of the girder concrete 9, the connection between the lower and upper supporting members 1, 4 by the bolts 7 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for movably supporting a movable end of a bridge girder and supporting the bridge girder so as not to be separated upward from an understructure such as a pier or abutment.

[0002]

2. Description of the Related Art Conventionally, as a device for supporting a movable end of a bridge girder so that the bridge girder does not move upward from a lower structure such as a bridge pier or abutment, for example, Japanese Patent Publication No. 63-4.
The one shown in Japanese Patent No. 6804 is known.

[0003]

According to the conventional example shown in FIG. 11 of the publication, the side block is fixed by the anchor bolt and the nut screwed to the anchor block, so that the side block travels above the bridge girder. Due to the vibration of the vehicle, the nut may loosen and the side block may come off the sole plate.

[0004]

In order to advantageously solve the above-mentioned problems, in the movement limiter for the movable end of the bridge girder of the present invention, a retaining member extending in the left-right direction is provided at the upper center of the lower support member 1. The stoppers 2 are integrally connected to each other via a support shaft 3, the support shaft 3 is fitted to the upper support member 4 so as to be movable in the front-rear direction, and the stoppers 2 are located at the lower portions of both left and right ends of the stopper 2. Is provided with a stopper support portion 5, and a spacer 6 is interposed between the lower support member 1 and the upper support member 4, the lower support member 1 and the upper support member 4 are connected by a bolt 7, Support member 1 to lower structure 8
Then, the girder concrete 9 extending in the front-rear direction is cast, and after the girder concrete 9 is hardened, the connection between the lower support member 1 and the upper support member 4 by the bolt 7 is released.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, as shown in FIGS. 1 to 5, a plurality of vertical locking holes 1 are provided on an upper portion of a lower structure 8 such as a pier or abutment.
0 is provided, the lower steel support member 1 arranged above the lower structure 8 is provided with the same number of female screw holes 11 as the locking holes 10, and the male screw portion 13 at the upper end of the lower anchor member 12 is provided. The upper part of the lower anchor member 12 and the lower surface of the lower support member 1 are fixed by welding.

A steel retaining stopper 2 extending in the left-right direction is arranged above the central portion of the lower supporting member 1, and an upper small-diameter shaft portion 14 and a lower large-diameter portion 14 are disposed below the retaining stopper 2. A steel support shaft 3 including a shaft portion 15 is integrally provided, and a lower portion of the support shaft 3 is integrally provided at an upper central portion of the lower support member 1.

A steel upper support member 4 disposed above the lower support member 1 is provided with a pair of horizontal ridges 16 located between the stopper 2 for retaining and the lower large-diameter shaft portion 15. A hole 17 is provided, and on the upper surface of the upper support member 4,
A steel cover plate 18 that closes the upper portion of the elongated hole 17 is fixed by welding, and the elongated hole 17 in the upper supporting member 4 is arranged so as to be oriented in the left-right direction.
17 are fitted into the stopper 2 and the support shaft 3 for preventing slipping off, and then the upper support member 4 is rotated by 90 °, and as shown in FIGS. The parts 5 are arranged on the lower left and right sides of the stopper 2 for preventing slipping off.

The male screw portions 20 provided on the lower portions of the plurality of upper anchor members 19 are screwed into the female screw holes 21 provided on the upper portion of the upper support member 4, and each upper anchor member 19 is formed.
The lower part of the and the upper surface of the upper support member 4 are fixed by welding. A packing 6 made of a plurality of fiber-mixed hard rubbers is interposed between the lower support member 1 and the upper support member 4, and a rubber shock absorber tube 22 is fitted on the lower large-diameter shaft portion 15 to form a lower support member. Lower connecting members 23 made of steel angle members are fixed to the left and right side surfaces of 1 by bolts 24, and upper connecting members 25 made of steel angle members are fixed to the left and right sides of the upper support member 4 by welding. A cap nut 26 is fixed to the upper connecting member 25 by welding, and a bolt 27 that is inserted into the lower connecting member 23 from below is screwed into the cap nut 26 to allow the cap nut 2 to move.
The bolt 6 connecting the lower support member 1 and the upper support member 4 is constituted by 6 and the bolt 27.

A hydraulic jack 28 is provided between the center of the lower surface of the lower support member 1 in the left-right direction and the center of the lower support member 1 in the left-right direction, and the upper surface of the lower structure 8. The level of the lower support member 1 is adjusted by each hydraulic jack 28.

Next, as shown in FIGS. 6 and 7, a room temperature hardening material 29 made of mortar or concrete is filled between the locking hole 10 and the lower anchor member 12 provided in the lower structure 8. After the room temperature curable material 29 has hardened, the hydraulic jacks 28 are removed, and then FIG.
Further, as shown in FIG. 9, the room temperature curable material 30 is cast between the lower surface of the lower support member 1 and the upper surface of the lower structure 8.

After the room temperature curable material 30 is cured,
The girder concrete 9 is cast, the upper support member 4 and the upper connecting member 25 are embedded in the girder concrete 9, and the bolt 27 connecting the lower connecting member 23 and the upper connecting member 25 is removed. To be done.

[0012]

According to the present invention, the stopper 2 for preventing slipping out extending in the left-right direction is provided at the upper center of the lower support member 1.
A stopper support portion that is integrally connected via a support shaft 3, has the support shaft 3 fitted to the upper support member 4 so as to be movable in the front-rear direction, and is located below the left and right ends of the retaining stopper 2. 5 is provided, and the spacer 6 is interposed between the lower support member 1 and the upper support member 4, the lower support member 1
The upper support member 4 and the upper support member 4 are connected to each other by bolts 7, the lower support member 1 is fixed to the lower structure 8, and the girder concrete 9 extending in the front-rear direction is cast. , The lower support member 1 by the bolt 7
Since the connection between the upper support member 4 and the upper support member 4 is released, the stopper 2 for retaining is provided integrally with the lower support member 1 through the support shaft 3, so that the stopper 2 for retaining runs on the bridge girder. Even if it receives vibration of the vehicle, it does not relax or misalign, and since the lower support member 1 is fixed to the lower structure 8 and the long hole 17 is fixed to the girder concrete 9. It is possible to surely prevent the positional deviation between the left and right end portions of the stopper 2 for preventing slipping out and the stopper support portions 5 on both the left and right sides.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view showing a state where a movement restricting device for a movable end of a bridge girder according to an embodiment of the present invention is not fixed to a lower support member and concrete for a girder.

FIG. 2 is a partially longitudinal side view of the portion shown in FIG.

FIG. 3 is a vertical sectional front view of a portion shown in FIG.

FIG. 4 is a vertical sectional side view of a portion shown in FIG.

FIG. 5 is a cross-sectional plan view showing a relationship between a long hole and a stopper for retaining the upper support member.

FIG. 6 is a partially longitudinal front view showing a state in which a room temperature curable material is filled between a locking hole of a lower structure and a lower anchor member.

FIG. 7 is a partially longitudinal side view of the portion shown in FIG.

FIG. 8 is a vertical cross-sectional front view showing a state in which a room temperature curable material is cast between a lower support member and a lower structure, and girder concrete is cast.

FIG. 9 is a vertical sectional front view showing a state in which a lower connecting member is removed.

[Explanation of symbols]

 1 Lower Support Member 2 Stopper Stopper 3 Spindle 4 Upper Support Member 5 Stopper Bearing 6 Spacer 7 Bolt 8 Lower Structure 9 Concrete for Girder 10 Locking Hole 11 Female Screw Hole 12 Lower Anchor Member 13 Male Screw Part 14 Upper Small Diameter Shaft Part 15 Lower large-diameter shaft part 16 Projection 17 Long hole 18 Lid plate 19 Upper anchor member 20 Male screw part 21 Female screw hole 22 Rubber buffer cylinder 23 Lower connecting member 24 Bolt 25 Upper connecting member 26 Cap nut 27 Bolt 28 Hydraulic jack 29 Room Temperature Curable Material 30 Room Temperature Curable Material

Claims (1)

[Claims] 1. A stopper 2, which extends in the left-right direction, is integrally connected to a central upper portion of a lower support member 1 through a support shaft 3, and the support shaft 3 is attached to the upper support member 4 in the front-rear direction. The stopper support portions 5 are provided so as to be movable in any direction and located at the lower left and right ends of the stopper 2 for retaining, and the spacer 6 is provided between the lower support member 1 and the upper support member 4.
With the interposition of the lower support member 1 and the upper support member 4
Are connected by bolts 7, the lower support member 1 is fixed to the lower structure 8, and concrete 9 for the girder extending in the front-rear direction is placed. After the concrete 9 for the girder is hardened, the bolt 7 is used. A movement limiting device for a movable end of a bridge girder that releases the connection between the lower support member 1 and the upper support member 4.