JP2524965B2 - Bridge slab erection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge slab installation structure.

[0002]

2. Description of the Related Art Conventionally, as a floor slab such as a lining plate, as shown in Japanese Patent Publication No. 41-19863, a flat surface 4 is used.
A rectangular floor slab is known.

[0003]

Since the floor slab composed of the conventional lining slab has a square shape in plan view, if the two supporting beams supporting the slab have a horizontal deviation, The floor slab is no longer supported at four points. Therefore, if a vehicle traveling above one of the unsupported floor slabs among the four supported parts of the floor slab rides, there is rattling on the floor slab. It has the drawback of occurring.

[0004]

In order to advantageously solve the above-mentioned problems, in the construction structure of the bridge slab of the present invention, a large number of isosceles triangular slabs 1 are alternately arranged at their tops. Arranged so as to face one side portion and the other side portion in the width direction, placed on a plurality of support beams 2 and adjacent to each other in the bridge longitudinal direction 2
The laterally tightened PC steel material 3 is inserted over the equilateral triangle slab 1, and the isosceles triangular slabs 1 adjacent to each other in the bridge longitudinal direction are joined by the laterally tightened PC steel material 3.

[0005]

7 to 9 show an isosceles triangular floor slab 1 used in the first embodiment of the present invention.
A reinforced concrete isosceles triangle slab main body 4 is provided with a locking hole 6 for inserting a shift preventing member 5 in a portion to be mounted on a support beam 2 composed of a main girder, and the isosceles 3 A PC steel material insertion hole 8 for inserting the horizontally tightened PC steel material 3 is provided at a position passing through the longitudinal center of each hypotenuse 7 of the rectangular floor slab main body 4, and a rear portion of the isosceles triangular triangular slab main body 4 A concave arc surface 9 is provided on the hypotenuse, and a convex arc surface 10 is provided on the front hypotenuse of the isosceles triangle slab main body 4, so that the isosceles triangle slab bodies 4 adjacent to each other in the bridge longitudinal direction are provided. The concave arc surface 9 and the convex arc surface 10 are fitted to each other. A sidewalk 11 is integrally connected to the wide-width side end between the pair of oblique sides in the isosceles triangle slab body 4.

1 to 6 show a bridge using the isosceles triangular floor slab 1 shown in FIGS. 7 to 9, in which several supporting beams 2 made up of main girders are respectively arranged in the front-back direction. Is arranged so as to extend to the abutment or bridge pier, and on the upper surface of the upper flange 12 of the support beam 2,
At a position where it is inserted into the locking hole 6, a shift preventing member 5 having a head portion 13 at its upper end is fixed by welding, and further, on the upper surface of the upper flange 12, for height adjustment made of super-fast hardening Faber mortar. Mortar 14 is applied.

Next, a large number of isosceles triangular slabs 1 are formed in the upper part of each support beam 2 at the apex, that is, the narrow end.
They are arranged so as to alternately face one side portion and the other side portion in the bridge width direction, are placed on the height adjusting mortar 14 of each support beam 2, and each shift preventing member 5 is placed in two. It is inserted into the locking hole 6 in the equilateral triangular slab 1.

Next, the non-shrinkable mortar 15 is filled in the engaging hole 6 and isosceles 3 adjacent to each other in the longitudinal direction of the bridge.
The horizontally tightened PC steel material 3 is inserted into the PC steel material insertion holes 8 arranged in series in the bridge width direction of the rectangular floor slab 1, and the horizontally tightened PC steel material is inserted.
The isosceles triangular slabs 1 that are adjacent to each other in the longitudinal direction of the bridge are laterally tightened by the nuts 16 screwed to the ends of the steel material 3. In addition,
In FIG. 3 and FIG. 4, the support beam 2 is installed over the abutment or pier 17, and adjacent support beams 2 are connected via a lower connecting member 18 and a brace 19.

FIGS. 10 to 13 show a bridge slab erection structure according to a second embodiment of the present invention, which is a positive 3
The isosceles triangular slabs 1 made of prismatic plates are arranged in two rows, and the tops of the isosceles triangular slabs 1 alternately face one side and the other side in the width direction of the bridge. Although they are arranged, other configurations are the same as in the case of the first embodiment.

[0010]

According to the present invention, a large number of isosceles triangular slabs 1 are arranged so that the tops thereof alternately face one side and the other side in the bridge width direction, and a plurality of supports are provided. It is placed on the beam 2 and the laterally tightened PC steel material 3 is inserted through the isosceles triangular plate slabs 1 that are adjacent to each other in the longitudinal direction of the bridge.
Since the isosceles triangle slabs 1 adjacent to each other in the longitudinal direction of the bridge are joined by, the isosceles triangle slab 1 is supported by three points, so that a vehicle such as an automobile rides on the isosceles triangle slab 1. However, the isosceles triangle slab 1 does not rattle, and a large number of isosceles triangle slabs 1 are alternately oriented to one side portion and the other side portion in the bridge width direction. By arranging and fixing them, a large number of isosceles triangular slabs 1 can be easily installed and fixed, and further, two adjacent isosceles triangular slabs 2 in the bridge longitudinal direction
Since the equilateral triangular slab 1 is laterally fastened by the lateral fastening PC steel material 3, each isosceles triangular slab 1 can be strongly integrated.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of an erection structure of a bridge deck according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a part of FIG. 1 in an enlarged manner.

FIG. 3 is a vertical sectional front view showing the construction structure of the bridge slab according to the first embodiment of the present invention.

FIG. 4 is a vertical sectional front view showing a left end portion of FIG. 3 in an enlarged manner.

FIG. 5 is a vertical cross-sectional front view showing an insertion portion of a horizontally tightened PC steel material and a shift prevention portion of a bridge floor slab.

6 is a plan view of a portion shown in FIG.

FIG. 7 is a plan view showing an isosceles triangular slab.

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

FIG. 9 is a vertical cross-sectional side view showing a state where isosceles triangular slabs adjacent to each other in the bridge longitudinal direction are fitted to each other.

FIG. 10 is a plan view showing a construction structure of a bridge deck according to a second embodiment of the present invention.

FIG. 11 is a plan view showing a part of FIG. 10 in an enlarged manner.

FIG. 12 is a vertical sectional front view showing a construction structure of a bridge deck according to a second embodiment of the present invention.

FIG. 13 is a vertical sectional front view showing a part of FIG. 12 in an enlarged manner.

[Explanation of symbols]

 1 2 isosceles triangular slab 2 support beam 3 lateral tightening PC steel 4 2 2 equilateral triangle slab main body 5 misalignment member 6 locking hole 7 oblique side 8 PC steel insertion hole 9 concave arc surface 10 convex arc surface 11 sidewalk 12 Upper flange 13 Head 14 Height adjusting mortar 15 Mortar 16 Nut 17 Abutment or pier 18 Lower connecting material 19 Brace

Claims (1)

(57) [Claims] 1. A plurality of isosceles triangular floor slabs 1 are placed on a plurality of support beams 2 with their tops alternately facing one side and the other side in the bridge width direction. A bridge in which the laterally tied PC steel material 3 is inserted over the isosceles triangular slabs 1 adjacent to each other in the bridge longitudinal direction, and the laterally tied PC steel materials 3 join the adjacent isosceles triangular slabs 1 in the longitudinal direction of the bridge. Floor slab erection structure.