JP3837214B2 - Installation method for concrete bridge girder support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for installing a concrete bridge girder support, and more particularly to a method for installing a concrete bridge girder support capable of easily fastening a rubber-like elastic support body installed at an end of a concrete bridge girder such as a road bridge. is there.
[0002]
[Prior art]
Conventionally, precast concrete T-shaped bridge girder (main girder) used in road bridges, etc., is formed in a T-shaped cross section at the factory. Girder concrete is cast to construct a bridge.
In addition, when installing a rubber-like elastic bearing body at the end of a bridge girder, the anchor bar and upper bar used for fastening with the rubber-like elastic bearing body when the main girder is produced are embedded in advance and produced. Things were going on.
[0003]
[Problems to be solved by the invention]
However, when the anchor bar and the upper bar are embedded in the main girder in advance in a factory or the like, there is a problem that there are many restrictions on the setting of the bar arrangement position and it is very difficult to manufacture and install. In addition, there is a problem that much labor and time are required for changing the rubber-like elastic support.
[0004]
It is an object of the present invention to provide a concrete bridge girder support installation method that can easily perform the installation work of the support by simultaneously performing the fastening of the main girder and the rubber-like elastic support at the time of placing the horizontal girder. is there.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention forms the upper collar of the rubber-like elastic bearing body at an interval wider than the main girder width in the direction perpendicular to the bridge axis, and a plurality of anchor bars are provided on the upper collar. Standing at a pitch, laying a prefabricated main girder between the anchor bars, and placing a concrete cross girder with the anchor bar embedded in the space on the side of the main girder and the upper arm, The gist is to integrally fasten the rubber-like elastic bearing body and the main girder via a concrete cross girder.
[0006]
The present invention is configured as described above, and the rubber-like elastic support body and the main girder are integrated with each other via a concrete cross girder that is cast in a state where the anchor bar is embedded in the space on the side of the main girder and the upper collar. By fastening to, it is possible to easily change the rubber-like elastic support body and erection of the bridge girder, and to simplify the production of the bridge girder.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a partial cross-sectional view of a road bridge end portion embodying the present invention, FIG. 2 is an enlarged cross-sectional view of part A of FIG. 1, FIG. 3 is a side view of FIG. A precast concrete bridge girder (main girder) 3 is pre-fabricated at a predetermined interval on the rubber elastic support 2 installed in the factory at a predetermined interval. The concrete cross beam 5 is driven in the state where the anchor bar 4 is embedded. Reference numeral 6 denotes a paved road surface installed on the bridge girder (main girder) 3.
[0008]
In the present invention, as shown in FIGS. 2 and 3, the upper rods 7 fixed on the rubber-like elastic support 2 are formed at intervals wider than the main beam width H in the direction perpendicular to the bridge axis. 7, a plurality of the anchor bars 4 are erected at a predetermined pitch at intervals wider than the main beam width H in the direction perpendicular to the bridge axis. In addition, 8 has shown the incisor.
Next, the installation method of concrete bridge girder support will be described.
First, the upper elastic member 7 of the rubber-like elastic support body 2 is formed at an interval wider than the main girder width H in the direction perpendicular to the bridge axis, and a plurality of anchor bars 4 are erected on the upper elastic member 7 at a predetermined pitch. Set it up. Then, the prefabricated main girder 3 is installed between the anchor bars 4, and the anchor bar 4 and the reinforcing bar 8 erected at a predetermined pitch on the side surface of the main girder 3 and the space X on the upper collar 7. The concrete cross girder 5 is laid in an embedded state.
[0009]
Thereby, the rubber-like elastic support body 5 and the main girder 3 can be integrally fastened through the concrete cross beam 5.
In addition, when changing the rubber-like elastic support 2, it can be dealt with by adjusting the width of the upper collar 7 in the direction perpendicular to the bridge axis and the pitch interval of the anchor bars 4. Without changing the width of the main girder 3, it is possible to cope with it by notching a thickness t corresponding to the upper collar 7 on the lower surface of the main girder 3 as shown in FIGS.
[0010]
The main girder 3 and the concrete horizontal girder 5 are preferably constructed so as to transmit a sufficient shearing force by the reinforcing bar 8 or the like.
[0011]
【The invention's effect】
According to the present invention, the upper collar of the rubber-like elastic bearing body is formed at intervals wider than the main girder width in the direction perpendicular to the bridge axis as described above, and a plurality of anchor bars are formed on the upper collar at a predetermined pitch. Standing up, laying a prefabricated main girder between the anchor bars, and placing a concrete cross girder with anchor bars embedded in the space on the side of the main girder and the upper arm, The rubber-like elastic support body and the main girder are integrally fastened through the cross beam, so that the rubber-like elastic support body can be easily changed and the bridge girder can be easily installed. The production of bridge girders can be simplified.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of an end portion of a road bridge embodying the present invention.
FIG. 2 is an enlarged cross-sectional view of a portion A in FIG.
FIG. 3 is a side view of FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Abutment (pier pier) 2 Rubber elastic support body 3 Bridge girder (main girder) 4 Anchor bar 5 Concrete cross girder 6 Pavement surface 7 Upper bar 8 Reinforcement bar H Main girder width X Space on main girder side and upper girder t thickness

Claims (1)

An upper collar of the rubber-like elastic bearing body is formed at an interval wider than the width of the main beam in the direction perpendicular to the bridge axis, and a plurality of anchor bars are erected on the upper collar at a predetermined pitch. A prefabricated main girder is installed between them, and a concrete cross girder is placed with the anchor bar embedded in the space on the side of the main girder and on the upper arm, and rubber elasticity is provided through this concrete cross girder. Installation method for concrete bridge girder bearings that integrally fasten the bearing body and main girder.

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