JPH0330406Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an expansion joint device, and more specifically, to an expansion joint device for structures such as road bridges.

[Prior art and its problems]

Conventionally, expansion joint devices have been widely used in road bridges as means for absorbing displacement of girder ends caused by temperature changes in the bridge, creep and drying shrinkage of concrete, repeated loads, and the like.

By the way, in this type of expansion joint device, fixing fittings are arranged at the edges of the floorboards facing each other with a clearance between them,
The ends of the flexible expansion joint members are connected to the attachment parts provided on the fixing metal fittings, and these fixing metal fittings are fixed to the floor plate using anchor bars and covering concrete similar to the floor plate concrete. The anchoring part is easily damaged due to the displacement of the end of the girder, and if damage occurs, various inconveniences may occur, such as abnormal noises caused by passing vehicles, accidents caused by the damaged part jumping up, and traffic jams due to impact on the vehicle. Become.

Therefore, ultra-early-strengthening concrete is used as covering concrete in order to quickly repair damaged anchorage parts, but this ultra-early-strengthening concrete lacks reliability in construction due to its low workability (softness in construction). In addition, problems requiring further improvement were pointed out, such as cracks occurring due to poor bending fatigue resistance.

[Means for solving problems]

Therefore, in this invention, in order to solve the above-mentioned problem, through-holes are opened at predetermined intervals along the edge of each floorboard, and fixing fittings are attached to the floorboard through tightening bolts inserted into these through-holes. At the same time, by covering the exposed part of the fixing fitting, including the floor plate fastening part, with resin concrete, it is possible to not only strengthen the anchoring part, but also facilitate construction and improve durability. .

In this case, filling the through holes with rubber-based grout can further improve the adhesion between the fixing fittings and the floorboards.Also, if resin concrete using a binding material containing liquid rubber is used as the resin concrete, This is suitable because it facilitates construction and further improves impact resistance and bending fatigue resistance.

[Effect]

In the expansion joint device according to this invention, the fixture is firmly fixed to the floorboard by the tightening force of the fastening bolt installed in the through hole of the floorboard and the adhesive force of the resin concrete.

〔Example〕

Next, preferred embodiments of the expansion joint device according to the present invention will be described in detail below with reference to the accompanying drawings.

In the accompanying drawings, the expansion joint device according to the present invention has floorboards 10 and 1 facing each other with a predetermined clearance a therebetween.
Elasmeric mortar layer 1 along the edge on 2
4 are formed, through holes 16 are opened at predetermined intervals, and fixing fittings 1 are formed at predetermined positions in the mortar layer 14.
8a and 18b are arranged facing each other, and these fixing fittings 1
The fixing fittings 18a and 18b are fastened together via a fastening tool, for example, a high-tensile bolt 20, which is attached to the through hole 16, and the exposed portions of the fastening fittings 18a and 18b, including the fastening portions, are covered with resin concrete 22, and further the fastening fittings 18a are and 18b are connected via a conventionally known flexible expandable joint member 24 made of rubber or the like.

That is, each of the fixing fittings 18a, 18b has a finger joint portion 26a, 26b extending on one end side, and the high tension bolt 20 on the other end side.
It is constructed by opening a long slot 28 for insertion, and these fixing fittings 18a, 18
b is set so that its upper surface is located substantially on the same plane as the paved surface B. In addition, each fixing metal fitting 18
Both ends of the flexible expansion joint member 24 connecting parts a and 18b are finger joint parts 26a and 26b.
and the long groove holes 28, 28.
, it is fixed by a stopper 30.

On the other hand, the through hole 16 is filled with, for example, rubber grout 32, and the fixing metal fitting 18 is inserted into the attached high-tensile bolt 20 through the long groove hole 28.
The fixtures 18a, 18b are configured to be securely fixed to the floorboards 10, 12 when they are fastened together with the nuts 34.

In addition, the nut 34 of the high-tensile bolt 20 and the exposed portions of the fixing fittings 18a, 18b are made of a bonding material containing a predetermined amount of liquid rubber in addition to epoxy resin to provide elasticity, bending fatigue resistance, and adhesion. Floorboard 1 is made of resin concrete with improved quick curing properties (product name: Elastomerits, manufactured by Kawada Kogyo Co., Ltd.).
0,12.

Note that the fixing fittings 18a, 18 adjacent to each other
Preferably, a', 18b, and 18b' are connected by a stopper 38 with a water stopper rubber 36 inserted therein to prevent rainwater from entering.

When using the expansion joint device according to the present invention constructed as described above, the high-tensile bolts 20 inserted through the through holes 16 of each floor plate 10, 12 are horizontally positioned using the long groove holes 28. The fixing fittings 18a and 18b are tightened with nuts 34, and the fixing fittings 18a and 18b are connected by a flexible expansion joint member 24.
The exposed portions such as a and 18b may be covered with resin cocrete 22.

In addition, the displacement at the end of the floor plate is
8a, 18b to the flexible expansion joint member 24, and is absorbed by the deformation of this joint member 24.
8 is firmly held by the stopper 30, so that inconveniences such as damage during deformation can be prevented as much as possible. In addition, if the joint member 24 is damaged due to long-term use, it is only necessary to replace the damaged joint member with a new joint member, and in addition, the fixing fitting 18
When repairing or replacing the resin concrete 22, only the resin concrete 22 portion may be removed and the high-tensile bolts 20 may be retightened or other repairs may be carried out.

[Effect of idea]

As mentioned above, according to the expansion joint device according to the present invention, the fixing metal fittings are tightly connected to the floorboard via the fastening bolts and grout installed in each through hole, so it is possible to improve the durability of the anchoring part. Not only that, but the exposed parts of the fixing fittings are covered with resin concrete, which makes the construction more reliable and easier, and also prevents cracks as much as possible by improving bending fatigue resistance. It has various advantages such as improving impact resistance and abrasion resistance, thereby improving the durability of the entire device, and its practical effects are extremely large.

Although the preferred embodiment of the expansion joint device according to the present invention has been described above, the present invention is not limited to this embodiment. Of course, various modifications such as chipping can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view showing a preferred embodiment of the expansion joint device according to the present invention, and FIG. 2 is an explanatory cross-sectional view taken along the line -- in FIG. 1. 10, 12... Floor board, 14... Mortar layer, 1
6...Through hole, 18...Fixing metal fittings, 20...High tensile strength bolt, 22...Resin concrete, 24...
Flexible expansion joint member, 26... Finger joint part, 28... Long slot for insertion, 29... Mounting part, 30, 38... Fastener, 32... Grout, 3
4...Natsuto, 36...Water stop rubber.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Fixing fittings are installed on the edges of the floorboards facing each other with a predetermined gap in between, and the ends of the flexible expansion joint members are installed on the mounting portions of each fixing fitting. In the expansion joint device, through holes are opened at predetermined intervals along the edge of each floor plate, and the fixing fittings are tightly connected to the floor plate via tightening bolts inserted into each through hole, and this fixing An expansion joint device characterized in that an exposed portion of the metal fitting including the floor plate fastening portion is covered with resin concrete. (2) The expansion joint device according to claim 1, wherein the through hole is filled with rubber grout. (3) The expansion joint device according to claim 1 or 2 of the utility model registration claim, which uses resin concrete using a binding material containing liquid rubber as the resin concrete.