JPH08232206A - Expansion joint - Google Patents

Abstract

PURPOSE: To provide an expansion joint capable of sufficiently absorbing the expansion of a first beam and a second beam. CONSTITUTION: An expansion joint 3 is provided with a first angle bar 4 of L-shaped section to be fixed to a first beam 1 and a second angle bar 5 of L-shaped section to be fixed to a second beam 2, and a rubber joint packing 6 is arranged between the first angle bar 4 and the second angle bar 5. A through hole 21 is made in the joint packing 6, and a bolt 12 fixed to a first vertical part 8 of the first angle bar 4 is inserted in the through hole 21 to prevent the joint packing 6 from falling. A through hole 18 through which the bolt 12 is passed is made in a second vertical part 15 of the second angle bar 5 opposite to the bolt 12, and when the first vertical part 8 is brought close to the second vertical part 15, the bolt 12 is advanced into the through hole 18, and the bolt 12 is not abutted on the second vertical part 15, and the expansion joint 3 can sufficiently absorb the expansion of the first and second beams 1, 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged between a first member and a second member constituting a bridge and absorbs expansion and contraction of the bridge (temperature change, dry expansion and contraction, creep change, load change, etc.). Expansion joints.

[0002]

2. Description of the Related Art The members constituting a bridge include a plurality of beams and
There are fixing members that support the beams. A gap is provided between the two beams or between the beam and the fixing member in consideration of expansion and contraction of the beam. An expansion joint that fills the gap and absorbs the amount of expansion and contraction is used for this gap. An expansion joint called a simple joint is used between the two beams having a relatively small expansion and contraction amount or between the beam and the fixing member.

This expansion joint is shown in FIG.
A metal first vertical portion 103 fixed by an anchor bolt 102 to the upper side surface at the end of one first beam 101 (first member), and the upper side surface at the end of the other second beam 104 (second member). The second vertical portion 106 and the first vertical portion 103 made of metal, which are fixed to the anchor bolts 105.
And an elastically deformable rubber joint packing 107 disposed between the second vertical portion 106 and the second vertical portion 106. The joint packing 107 is placed on a horizontal metal projection 108 that is fixed to the side surface of the first vertical portion 103 in the horizontal direction by welding or the like, and is prevented from falling.

[0004]

In the expansion joint shown above, the first and second beams 101 and 104 extend to form the first and second beams.
When the vertical portions 103 and 106 come close to each other, the first vertical portion 10
The end portion of the horizontal projection 108 fixed to the third vertical portion is the second vertical portion 1
It hits the side of 06. Then, first,
The second vertical portions 103 and 106 are inaccessible.

That is, in the conventional expansion joint, the amount by which the beam expands and the distance between the first vertical portion 103 and the second vertical portion 106 becomes smaller is not determined by the amount of compressive deformation of the joint packing 107, but by this amount. The distance between the end of the horizontal protrusion 108 and the side surface of the second vertical portion 106, which is smaller than the amount of compressive deformation, is determined. Therefore, the expansion joint of the conventional structure,
It was not possible to sufficiently absorb the elongation of the members that make up the bridge.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an expansion joint capable of increasing the amount of absorption due to the approach of a first member and a second member constituting a bridge. It is in.

[0007]

The expansion joint of the present invention adopts the following technical means in order to achieve the above object. The expansion joint is arranged between the first member and the second member, and absorbs the amount of expansion and contraction between the first member and the second member, and extends along the upper surface of the end portion of the first member. A first angle bar made of a metal having a substantially L-shaped cross section, the first horizontal part being fixed by the first horizontal part, and the first vertical part being fixed along the side surface of the end part of the first member; A second horizontal portion fixed along the upper surface of the end portion of the two members, and a second vertical portion fixed along the side surface of the end portion of the second member. A second angle bar and an elastically deformable joint packing arranged between the first vertical portion and the second vertical portion are provided.

Further, the joint packing is formed with a through hole penetrating in the horizontal direction, and the first vertical portion is formed with a through hole.
A horizontal protrusion inserted into the through hole of the joint packing is fixed, and an insertion hole through which the horizontal protrusion fixed to the first vertical portion can be inserted is formed in the second vertical portion.

[0009]

When at least one of the first member and the second member forming the bridge extends, the first vertical portion of the first angle bar and the second vertical portion of the second angle bar come close to each other, and the joint packing is performed. Elastically deforms to absorb the elongation of at least one of the first member and the second member. At this time, even if the first member or the second member has a large elongation amount and the first vertical portion and the second vertical portion are extremely close to each other,
Since the horizontal protrusion fixed to the vertical portion is inserted into the insertion hole of the second vertical portion, the first vertical portion and the second vertical portion can approach each other without being affected by the horizontal protrusion.

[0010]

As described above, the expansion joint of the present invention allows the first vertical portion and the second vertical portion to approach each other without being affected by the horizontal projections, and is The amount of absorption due to the proximity of the first member and the second member can be increased.

[0011]

EXAMPLE Next, the expansion joint of the present invention will be explained based on an example shown in the drawings. [Structure of Embodiment] FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 is a sectional view of an expansion joint, and FIG. 2 is a top view of the expansion joint. One first beam 1 (an example of a first member) that is arranged to extend in the horizontal direction and that constitutes an elevated structure or a bridge;
The first beam 1 and the second beam 2 are provided between the other end of the first beam 1 and the other second beam 2 (an example of the second member) that extends in the horizontal direction and is spaced from the end of the first beam 1. An expansion joint 3 that absorbs the amount of expansion and contraction is provided.

The expansion joint 3 includes a first angle bar 4 fixed to the upper corner of the end of the first beam 1 and a second angle bar fixed to the upper corner of the end of the second beam 2. 5 and 1
It is mainly composed of joint packing 6 arranged between angle bar 4 and second angle bar 5.

The first angle bar 4 is made of metal (for example, iron) having an L-shaped cross section, and the first horizontal portion 7 fixed along the upper surface of the end portion of the first beam 1 and the first beam 1. And a first vertical portion 8 fixed along the side surface of the end portion of the. A first anchor bolt 9 is welded and fixed to the first vertical portion 8, and the first anchor bolt 9 is sealed with a first concrete 11 having a reinforcing bar, whereby the first angle bar 4
However, it is firmly fixed to the end portion of the first beam 1.

Also, the first vertical portion 8 of the first angle bar 4
After the hole is formed, the bolt 12 is inserted toward the second angle bar 5. The bolt 12 is a horizontal projection that is inserted into a through hole (described later) of the joint packing 6, and is fixed to the first vertical portion 8 by welding. Further, a first trapezoidal joint 13 fitted into a fitting groove 22 (described later) provided on the side surface of the joint packing 6 is fixed to the surface of the first vertical portion 8 on the second vertical portion side by welding. There is.

The second angle bar 5 is made of metal (for example, iron) having an L-shaped cross section, and has a second horizontal portion 14 fixed along the upper surface of the end portion of the second beam 2 and the second beam 2. And a second vertical portion 15 which is fixed along the side surface of the end portion. The second anchor bolt 16 is welded and fixed to the second vertical portion 15, and the second anchor bolt 16 is sealed by the second concrete 17 having the reinforcing bar, whereby the second angle bar 5 is It is firmly fixed to the end of the second beam 2.

The second vertical portion 1 of the second angle bar 5
5 is provided with an insertion hole 18 through which the bolt 12 fixed to the first vertical portion 8 can be inserted. This insertion hole 18
The diameter of the bolt 12 is larger than that of the bolt 12 so that the bolt 12 can be easily moved inside the hole. Further, on the surface of the second vertical portion 15 on the first vertical portion 8 side, a second trapezoidal joint 19 that fits into a fitting groove 22 (described later) provided on the side surface of the joint packing 6 is integrally provided. ing.

The joint packing 6 is an elastic body made of rubber (for example, neoprene rubber) which is elastically deformable and excellent in durability, and has a deformation hole 20 formed therein for facilitating the compression deformation of the joint packing 6. Has been done. Further, on both side surfaces of the joint packing 6, through holes 21 penetrating in the horizontal direction are formed.
Are formed. Through the through hole 21, the bolt 12 fixed to the first vertical portion 8 is inserted, and the joint packing 6
It is provided with a diameter slightly larger than the diameter of the bolt 12 so that the bolt 12 can move inside the hole. Further, fitting grooves 22 having a substantially trapezoidal cross section are formed on both side surfaces of the joint packing 6. This fitting groove 2
2 is fitted in the first trapezoid joint 13 and the second trapezoid joint 19 respectively.

On the other hand, the first horizontal portion 7 and the second horizontal portion 14
As shown in the top view of FIG. 2, the holes 23 are provided at predetermined intervals.
Are formed. This hole 23 is used to confirm the pouring state of the first concrete 11 and the second concrete 17 inside. A nut 24 is fixed to a part of the hole 23 below the first horizontal portion 7 and the second horizontal portion 14 by welding. This nut 24 is used for the expansion joint 3
Connection bar 2 that integrates the first angle bar 4, the second angle bar 5, and the joint packing 6 until the construction of
This is for fixing 5 and the connecting bar 25 is to be removed after the construction.

[Operation of Embodiment] Next, the operation of the expansion joint 3 will be described. When the first beam 1 and the second beam 2 contract and the space between the first beam 1 and the second beam 2 expands, it acts so as to expand between the first angle bar 4 and the second angle bar 5. Even in this state, the bolt 12 fixed to the first vertical portion 8
The state of being inserted into the through hole 21 of the joint packing 6 is maintained, and the joint packing 6 is prevented from falling.

On the contrary, the first beam 1 and the second beam 2 extend,
When the first beam 1 and the second beam 2 approach each other, the first angle bar 4 and the second angle bar 5 act so as to approach each other. Then, the joint packing 6 is elastically deformed by the compressive force between the first vertical portion 8 and the second vertical portion 15, and the interval between the first vertical portion 8 and the second vertical portion 15 becomes narrow. This time,
Even if the first beam 1 and the second beam 2 have a large elongation amount and the first vertical portion 8 and the second vertical portion 15 are extremely close to each other, the bolt 12 fixed to the first vertical portion 8 is , And is inserted into the insertion hole 18 of the second vertical portion 15. That is, the bolt 12 does not hit the second vertical portion 15, and the first vertical portion 8 and the second vertical portion 15 can approach each other.

On the other hand, when the vehicle passes over the expansion joint 3, the first and second angle bars 4 and 5 receive the load of the vehicle and the impact caused by running, so that the first and second concrete 11,
Tell 17. Here, the corner portion of the first concrete 11 is protected by the first angle bar 4, and the corner portion of the second concrete 17 is protected by the second angle bar 5. The load received by the first horizontal portion 7 of the first angle bar 4 is received by the first concrete 11,
The load received by the first vertical portion 8 of the first angle bar 4 is received by the first concrete 11 via the first anchor bolt 9. Similarly, the load received by the second horizontal portion 14 of the second angle bar 5 is received by the second concrete 17, and the load received by the second vertical portion 15 of the second angle bar 5 is received by the second anchor bolt 16. The second concrete 17 is received via. In this way, the first and second concrete 1
The corners 1 and 17 have the first and second angle bars 4,
Since the load is dispersed and transmitted while being reinforced by 5, the occurrence of breakage of the first and second concrete 11 and 17 is prevented.

[Effects of Embodiment] Expansion joint 3 of this embodiment
As described above, the first vertical portion 8 and the second vertical portion 15 can approach each other without being affected by the bolt 12,
The expansion absorption amount of the first beam 1 and the second beam 2 in the expansion joint 3 is determined by the amount of compressive deformation of the joint packing 6. That is, it is possible to increase the amount of absorption of the elongation of the first beam 1 and the second beam 2 as compared with the related art.

In addition to the first and second vertical portions 8 and 15,
Since the first horizontal portion 7 and the second horizontal portion 14 are integrally provided, damage to the first and second concrete 11 and 17 can be suppressed. That is, the durability is excellent, and the cost required for repair can be kept low. Further, since the proportion of repair work is reduced, it is possible to reduce the influence of the repair work on the traveling vehicle.

Further, the first horizontal portion 7 and the second horizontal portion 1
Since 4 can be connected by the connecting bar 25 until the construction is completed, the workability of the expansion joint 3 is improved.

[Modification] In the above embodiment, the first beam and the second beam are used as an example of the first member and the second member, and
Although the example in which the expansion joint is provided between the beam and the second beam is shown, the expansion joint of the present invention may be applied between the beam and the fixing member. Although bolts are used as an example of horizontal projections for the purpose of reducing the production cost, rod-shaped projections having no screws on the surface may be used.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an expansion joint (Example).

FIG. 2 is a top view of the expansion joint (Example).

FIG. 3 is a schematic sectional view of an expansion joint (prior art).

[Explanation of symbols]

 1 1st beam (1st member) 2 2nd beam (2nd member) 3 Expansion joint 4 1st angle bar 5 2nd angle bar 6 Joint packing 7 1st horizontal part 8 1st vertical part 12 Bolt (horizontal protrusion) 14 2nd horizontal part 15 2nd vertical part 18 insertion hole 21 through hole

Claims (1)

[Claims] 1. A device disposed between a first member and a second member,
An expansion joint that absorbs the amount of expansion and contraction between the first member and the second member, the first horizontal portion being fixed along an upper surface of an end portion of the first member, and an end portion side surface of the first member. A first metal part having a substantially L-shaped cross section with a first vertical part fixed along the
The angle bar, a second horizontal portion fixed along the upper surface of the end portion of the second member, and a second vertical portion fixed along the side surface of the end portion of the second member have a substantially L-shaped cross section. Second made of metal
An angle bar; and an elastically deformable joint packing arranged between the first vertical portion and the second vertical portion, wherein the joint packing has a through hole penetrating in a horizontal direction. A horizontal protrusion inserted into the through hole of the joint packing is fixed to the first vertical portion, and an insertion hole into which the horizontal protrusion fixed to the first vertical portion can be inserted to the second vertical portion. Expansion joint characterized in that