JP2003321804A - Expansion joint for felloe guard section and method for constructing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that each of a felloe guard section for a concrete girder and the felloe guard section for an abutment is damaged when they collide with each other or they collide with a concrete spacer material installed between them by the impulses of an earthquake or the like. <P>SOLUTION: An expansion joint for the felloe guard sections, which is composed of hollow cylindrical bodies made of steel at both ends and one or more of the hollow cylindrical bodies made of steel positioned between the hollow cylindrical bodies and in which fixtures installed and fixed to the girder felloe guard section or the abutment felloe guard section are fixed to the hollow cylindrical bodies made of steel at both ends respectively, the peripheral sizes of external surfaces and internal surfaces are made to differ to the adjacent hollow cylindrical bodies made of steel and each hollow cylindrical body made of steel is fitted mutually, the hollow cylindrical bodies in required lengths are manufactured and the fitting sections of each hollow cylindrical body are bound by binding tools excepting the fitting section of the hollow cylindrical body mutually fitted to the hollow cylindrical body at one end. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab expansion joint installed between slabs of concrete girders mounted on an abutment facing each other.

[0002]

2. Description of the Related Art Usually, an abutment is composed of a concrete girder mounting portion and a road surface portion, and both sides of the road surface portion are covered with a ground covering portion facing the ground covering portion of the concrete girder mounted on the mounting portion. Are formed.

When the concrete girder is placed on the placing portion of the abutment, an expansion joint is installed between the facing surfaces of the concrete girder and the abutment. The expansion joint is usually installed between the road surfaces of the concrete girder and the road surface of the abutment, but is rarely installed between the ground cover of the concrete girder and the ground cover of the abutment.

The expansion joints are installed on the facing surfaces of the road surface of the concrete girder and the road surface of the abutment, and are not installed between the facing ground coverings in addition to the bridge itself being large in size. This is because it is very difficult to integrally fabricate between the facing surfaces of the road surface portion and the facing surface of the ground covering portion because the positions and shapes are different and bending is difficult.

Therefore, a space member made of concrete or the like is provided between the concrete girder and the abutment to treat the space between the facing girder and the abutment. It is usual to install the device with a gap considering the amount of expansion and contraction.

[0006]

However, when a padding material formed of concrete or the like is placed between the ground cover of the concrete girder and the ground cover of the abutment, expansion and contraction between them are considered. Even if a gap is provided, when the concrete girder or abutment moves unexpectedly such as when an earthquake occurs, when each ground cover collides with this padding material or when the padding material is not installed. Has a problem that the ground coverings of concrete girders and abutments of abutments are damaged due to the phenomenon that the ground coverings of the opposite sides collide with each other.

The present invention is intended to solve the above problems by the following points.

[0008]

In order to solve the above-mentioned problems, the present invention provides an expansion joint installed between ground cover parts and a method of constructing the expansion joint.

First, the expansion joint for the ground cover comprises a steel hollow cylindrical body at both ends and one or more steel hollow cylindrical bodies located between the steel hollow cylindrical bodies. Fixing fixtures that are attached and fixed to the girder ground cover or the abutment ground cover, respectively, are attached to the cylinders, and each steel hollow cylinder has outer and inner circumferential dimensions with respect to the adjacent steel hollow cylinders. Differently so that they can be fitted together to form a row of steel hollow cylinders of the required length, and the fitting portion of each steel hollow cylinder fits with the steel hollow cylinder at one end. Except for the fitting portion of the steel hollow cylinder, it is constructed by joining with a joining tool.

In this structure, the fittings fixed to the steel hollow cylindrical bodies at both ends are, for example, mounted on the closed surfaces by closing one opening of the steel hollow cylindrical body.

In this structure, the joining tool for joining the fitting portions of the steel hollow cylindrical bodies which are fitted to each other is weaker in strength than the steel hollow tubular body.

Next, as a construction method of the expansion joint for the ground cover, after the concrete girder is placed on the abutment, the expansion joint for the ground cover is placed on the facing surface of the ground cover facing the concrete girder and the abutment. 1 or 2 in which the outer circumference and inner circumference of the steel hollow cylinders are different from each other so that the steel hollow cylinders located at both ends of the steel hollow cylinder can be fitted to the steel hollow cylinders adjacent to the steel hollow cylinder. The above steel hollow cylinders are fitted and connected continuously, and the fitting part of each steel hollow cylinder is fitted to one steel hollow cylinder fixed to the concrete girder and the abutment of the abutment. Provided is a construction method in which a fitting member is joined to a hollow steel tubular body to be joined by a joining tool.

More specifically, after placing the concrete girder on the abutment, steel hollow cylinders located at both ends of the expansion joint for the ground covering are attached to the facing surface of the ground covering facing the concrete girder. 1 or 2 or more steel hollow cylinders whose outer and inner circumferential dimensions are different from each other so that they can be fitted to the steel hollow cylinders adjacent to the steel hollow cylinders by fixing with a tool. , And the fitting part of each steel hollow cylinder is fixed to the abutment and the ground cover of the concrete girder. The fitting part with the steel hollow cylinder that mates with one steel hollow cylinder. Excluding the above, there is provided a method for constructing an expansion joint for a ground cover, which is joined with a joining tool having a strength lower than that of a hollow steel tube.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 3 are a front view, a side view and a side sectional view taken along the line AA showing an embodiment of an expansion joint for a ground cover according to the present invention.

The expansion joint 1 for the ground cover is composed of hollow cylinders 11 and 11 located at both ends and hollow cylinders 12 and 13 located between the hollow cylinders 11 and 11. Hollow cylinders 11, 1
1, 12, 13 are all front plates 11a, 11a, 12
a, 13a, top plates 11b, 11b, 12b, 13b,
Back plate 11c, 11c, 12c, 13c, bottom plate 11
d, 11d, 12d, 13d, front plate 11
Slope portions 11e, 11e, 12e, 13e as vehicle tire support portions are formed on a, 11a, 12a, 13a, and are formed as steel hollow cylinders as a whole.
The shape of the cylindrical body is not limited, and for example, the slope 11
Needless to say, e, 11e, 12e, and 13e may be directly launched from below.

The hollow cylinders 11, 11 located at both ends are both fittings for fixing and fixing to the mutually facing surfaces of the concrete girder cover or bridge abutment cover, which will be described later, in this embodiment. Are side plates 11f, 11 in which the stud bolts 2, 2 close the openings of the hollow girder bodies 11, 11 on the side of the concrete girder cover or the bridge base cover.
It is fixedly attached via f. The method of attaching the attachment is not limited, and the attachment may be attached to another surface without using the side plate. Further, it goes without saying that the mounting tool is not limited to the stud bolt.

In principle, the hollow cylinders 11, 11 located at both ends have the same outer and inner circumferential dimensions, and the hollow cylinders 11, 12, 13, 11 are adjacent to each other on the outer surface and the inner surface. The inner surface has different circumferential dimensions so that they can be fitted to each other, and they are fitted with each other to form a hollow cylinder row having a length required for installation between the concrete girder cover and the bridge abutment.

The fitting portion of each hollow cylindrical body is a fitting portion of the hollow cylindrical body that fits with the hollow cylindrical body at one end, and in this embodiment, the fitting portion of the hollow cylindrical body 11 and the hollow cylindrical body 13. Except for, the fitting portions of the hollow cylindrical body 11 and the hollow cylindrical body 12 and the fitting portions of the hollow cylindrical body 12 and the hollow cylindrical body 13 which are adjacent to each other are joined using the rivet 3 made of aluminum. In this embodiment, a rivet whose strength is weaker than that of the hollow cylinder is used as the coupling tool. Of course, the coupler is not limited to rivets.

In this way, the steel hollow cylinders located at the both ends as a whole and 1 or 2 located between the steel hollow cylinders.
An expansion joint for the ground covering part, which is formed of the above hollow steel tubular body, is formed.

4 and 5 are a plan view and a BB of the plan view for explaining the construction method of the expansion joint for the ground covering part according to the present invention.
It is a cross-sectional view (one abutment side facing the concrete girder and one ground cover side facing the road surface are omitted).

First, the abutment 5 facing the concrete girder 4
Is placed on the placing surface 5c of the concrete via the trough 6, and between the ground covering portions 5a of the abutment 5 facing the ground covering portion 4a of the concrete girder 4,
The expansion joint 1 for the ground cover, which is made of the above-mentioned steel hollow cylinder, is installed.

For the installation, the opposing concrete girders 4 are prepared by using the fixtures 2 prepared in advance as described above and fixed to the hollow cylinders 11 located at both ends as they are.
Although it may be attached to the ground covering portion 4a and the ground covering portion 5a of the abutment 5, the construction may be performed by mounting as follows.

Hollow cylinders 11 and 11 are attached to the facing surfaces of the ground cover 4a of the concrete girder 4 and the ground cover 5a of the abutment 5, respectively. In this embodiment, the stud bolts 2, 2 that are fixtures fixed to the side plates 11f, 11f that close one opening of the hollow tubular bodies 11, 11 are opposed to the stud bolts 2, 2 that face the concrete girder 4 and the abutment. It is performed by burying the ground covering portions 5a of No. 5 on the respective facing surfaces.

Next, the hollow cylinders 11 and 11 adjacent to the hollow cylinders 11 and 11 are connected to one hollow cylinder 11 and the other hollow cylinder 11 to the hollow cylinder 13. Ground covering portions 4a of the concrete girders 4 that are fitted and face each other
And the ground covering portion 5a of the abutment 5 are continuous. As described above, each hollow cylindrical body is formed such that the outer circumferential surface and the inner circumferential surface of the hollow cylindrical body are different from each other so that they can be fitted to each other.

The fitting portion of each hollow cylindrical body is a fitting portion of the hollow cylindrical body that fits with the hollow cylindrical body at one end, and in this embodiment, the fitting portion of the hollow cylindrical body 11 and the hollow cylindrical body 13. Except for the above, the fitting portions of the hollow cylindrical body 11 and the hollow cylindrical body 12 which are adjacent to each other and the fitting portions of the hollow cylindrical body 12 and the hollow cylindrical body 13 which are adjacent to each other are coupled using the rivets 3. In this embodiment, a rivet having a strength lower than that of the hollow cylindrical body is used as the coupling tool.

In this way, as a whole, the expansion joints for the ground cover, which are made of steel hollow cylinders located at both ends and one or more steel hollow cylinders located between the steel hollow cylinders, are constructed. To be done.

Reference numeral 7 is a road surface portion 4b of the concrete girder 4.
It is an expansion joint installed between the road surface portion 5b of the abutment 5 and the abutment 5.

[0029]

As described above, the present invention has the following effects.

In the first to fifth aspects, the plurality of steel hollow cylindrical bodies are fitted to each other with different circumferential dimensions of the outer surface and the inner surface so that they can be fitted to each other, so that the required length can be obtained. A row of hollow steel cylinders can be manufactured, and the length between the girder ground cover and the abutment can be appropriately adjusted.

In the first to fifth aspects of the present invention, the fitting portion of each steel hollow cylindrical body is fitted with one of the steel hollow cylindrical bodies attached to the ground covering portion of the concrete girder and the ground covering portion of the abutment. When the concrete girders and abutments expand and contract by joining with the joining tool except fitting of the hollow steel tubular bodies that fit together, the steel hollow barrels not joined by the joining tools move each other. , Absorb this expansion and contraction.

According to the third and fifth aspects, the joining tool for joining the fitting portions of the steel hollow cylindrical bodies to be fitted to each other is joined by a joining tool having a strength lower than that of the steel hollow tubular body, so that an earthquake or the like is caused. Even if you feel more than expected or irregular movement due to a stronger impact, the couplers will rupture and the hollow steel cylinders will fit deeply into each other, and Can avoid damage.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a ground covering expansion joint according to the present invention.

FIG. 2 is a side view showing an embodiment of an expansion joint for ground covering according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view showing a construction method of the expansion joint for the ground covering portion according to the present invention.

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

1 Expansion joint for ground cover 11 Steel hollow cylinder 12 Steel hollow cylinder 13 Steel hollow cylinder 11a, 12a, 13a front plate 11b, 12b, 13b Top plate 11c, 12c, 13c Rear plate 11d, 12d, 13d bottom plate 11e, 12e, 13e Slope plate 11f side plate 2 Mounting tool (stud bolt) 3 Couplings (rivets) 4 concrete girders 4a Ground cover 4b Road surface 5 abutments 5a Ground cover 5b Road surface 5c Placement part 6 shoes 7 Expansion joint

Claims (5)

[Claims] 1. A steel hollow cylinder at both ends and one or more steel hollow cylinders located between the steel hollow cylinders,
The steel hollow cylinders at both ends are fixed with fittings that are attached and fixed to the girder ground cover or the abutment ground cover, respectively, and each steel hollow cylinder has an outer surface and an adjacent outer surface with respect to adjacent steel hollow cylinders. The inner circumferences of the hollow cylinders are made different so that they can be fitted so that they fit together, forming a row of steel hollow cylinders of the required length. The fitting portion of each steel hollow cylinder has a steel hollow cylinder at one end. An expansion joint for a ground covering part, characterized in that it is joined with a joining tool except for the fitting part of a steel hollow cylindrical body that fits with. 2. The fixture fixed to the steel hollow cylinders at both ends is attached to the girder cover or bridge abutment by closing one opening of the steel hollow cylinder and fixing it to the closing surface. It fixes, The expansion joint for ground covering of Claim 1 characterized by the above-mentioned. 3. The expansion joint for the ground cover portion, wherein the fitting for joining the fitting portions of the steel hollow cylindrical bodies to be fitted to each other is weaker than the steel hollow cylindrical body. 4. A concrete girder is placed on an abutment, and a steel hollow cylinder is fixed to each of the facing surfaces of the facing portions of the concrete girder and the abutment, and the steel adjacent to the steel hollow cylinder is fixed. One or two or more steel hollow cylinders having different outer and inner circumferential dimensions so that they can be fitted to each other, are fitted and continuous to each other, and the respective steel hollow cylinders are fitted together. Characterized in that the parts are connected with a coupling tool except for the fitting part of the steel hollow cylindrical body which is fitted to one steel hollow cylindrical body fixed to the respective ground coverings of the concrete girder and abutment Construction method of expansion joint for ground cover. 5. A concrete girder is placed on an abutment, and a steel hollow cylinder is fixed to each of the facing surfaces of the ground cover facing the concrete girder using a fitting, and the steel hollow cylinder is also fixed. The outer and inner circumferences of the adjacent hollow steel cylinders have different circumferential dimensions so that they can be fitted to each other.
Alternatively, two or more steel hollow cylinders are fitted and connected continuously, and the fitting portion of each steel hollow cylinder is fitted to one steel hollow cylinder fixed to the abutment and the concrete girder cover. A method for constructing an expansion joint for a ground cover, which is characterized by joining with a joining tool having a strength lower than that of the steel hollow cylinder except for a fitting portion with a hollow steel cylinder to be fitted.