JPH0790810A - Reinforced earth arch structure - Google Patents

Abstract

PURPOSE:To provide a reinforced earth arch structure favourable N in traveling characteristics of a vehicle and excellent in earthquake resistance by assembling and stacking left and right side panels on both sides of an arch bridge pier and filling light banking earth between these left and right panels. CONSTITUTION:Bridge piers made of cast-in-place reinforced concrete or precast concrete are constructed with specified intervals. Between these bridge piers, a bridge girder 2 is constructed over. A plural number of arch beams 2a constituting the bridge beam 2 are integrally connected to each other by a connecting member 2b. The arch beam 2a is made of concrete to make a large span possible. On both sides of the bridge girder 2, left and right side panels 3 are piled so as to be, so called, breaking joints. Between the left and right side panels, a tie-bolt 4 is furnished, and by a turnbackle 4a, an interval between the both panels 3 is adjusted. Between these left and right side panels 3, light banking earth is filled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced soil arch structure applied to bridges and the like.

[0002]

2. Description of the Related Art Generally, an arch structure may be applied to a structure such as a bridge in consideration of decoration and the like. Conventionally, this type of arch structure is a reinforced concrete structure. Often built by.

Therefore, if the general road leading to this type of bridge is not paved, the traveling vehicle will travel from the unpaved general road onto the concrete paved road, and the traveling characteristics of the vehicle will be significantly deteriorated. become. For this reason, it is desirable that the road surface of the bridge should have the same structure as an unpaved road.

As one of the methods for solving this problem, it is possible to apply a reinforced soil construction method using soil and a reinforcing material, but since it has a complicated shape, the construction becomes difficult and it is not practical.

Further, it takes a lot of manpower and labor, and since the weight is considerable, there is a problem that it is disadvantageous against an earthquake in addition to workability.

The present invention has been made to solve the above problems, and an object thereof is to provide a reinforced earth arch structure which is easy to construct, has good running characteristics of a vehicle, and is excellent in earthquake resistance. To do.

[0007]

The reinforced soil arch structure according to the first aspect of the present invention comprises bridge piers constructed at predetermined intervals, arch-shaped bridge girders installed between the piers, and The left and right sides of the bridge girder are provided with a plurality of left and right side panels that are stacked while being connected to each other, a plurality of connecting members that connect the left and right side panels, and a lightweight embankment material filled between the left and right side panels. Is built by.

Further, in the reinforced soil arch structure of the above paragraph,
The bridge girder is constructed by joining a plurality of arch beams constructed in an arch shape from prestressed concrete in the width direction of the bridge girder and integrally connecting the plurality of arch beams with a plurality of connecting members.

[0009]

【Example】

Example 1. 1 to 3 show an embodiment of a reinforced soil arch structure according to the present invention, in which the reference numeral 1 denotes a pier, 2
Is a bridge girder that is constructed in the shape of an arch and is bridged between bridge piers 1 and 1, 3 is a left and right side panel that is built on the left and right sides of this bridge girder 2 to a predetermined height, and 4 is a left and right side panel 3,3 A tie bolt as a connecting member for connecting the 5 is a lightweight embankment material filled between the left and right side panels 3, 3, 6 is a crushed foundation stone laid on the lightweight embankment material 5 to a predetermined thickness, and 7 is this Reference numeral 9 is a leveling concrete placed on the basic crushed stone 6 to a predetermined thickness, 8 is a handrail installed on the leveling concrete 7, and 9 is a finish by asphalt pavement or the like.

The bridge piers 1 are constructed of cast-in-place reinforced concrete or precast concrete at predetermined intervals.

The bridge girder 2 is constructed in a plate-like arch shape by a plurality of arch beams 2a having a predetermined curvature and formed in an arch shape, and a plurality of connecting members 2b for binding the arch beams 2a. ing.

The arch beam 2a is constructed of prestressed concrete so that it can have a large span.
A plurality of 2a are attached to each other in the width direction, and are integrally connected by a plurality of connecting members 2b penetrating these arch beams 2a ,. Connecting member 2b
For example, high-strength steel wire such as PC steel wire is used.

The left and right side panels 3 are formed from a precast concrete board in a rectangular plate shape and are adjacent to each other.
The joints between 3 and 3 are stacked so that they are so-called jumble joints that are not continuous in the vertical direction.

The side panels 3 are connected in the vertical direction and the width direction by a plurality of reinforcing bars 10 which continuously penetrate the side panels 3 in the vertical direction. In addition, each side panel 3
The reinforced mortar insertion hole 11 formed in the above is filled with mortar 11 so that the side panel 3 and the reinforcing bar 10 are integrated.

A turnbuckle 4a is attached to the middle portion of each tie bolt 4 so that the length of the tie bolt 4 can be changed and the space between the left and right side panels 3, 3 can be adjusted.

The lightweight embankment material 5 is filled between the left and right panels 3, 3 above the bridge girder 2, and the tie bolts 4 are completely embedded in the lightweight embankment material 5.

The lightweight embankment material 5 includes, for example, a foamed mortar, a clay-containing soil mixture containing a foamed polyurethane foam material, a coal ash, a mixture of coal husk and coal, a curable fluid containing a lightweight aggregate, and the like. All of them have the property of flowing during construction and hardening with the passage of time.

Further, styrofoam blocks, styrofoam beads and hardening materials, and hardening fluids obtained by adding soil or fly ash to these are also used.

Further, among the above materials, it is possible to fill a space which cannot be filled with the styrofoam block with a fluid for integration.

In this case, the most suitable lightweight embankment material 5 should be selected in consideration of the running characteristics of the vehicle depending on the construction site.

Further, as a method of connecting the left and right side panels 3 and 3, in addition to the tie bolts 4, a rebar mesh or geogrid can be used, or these can be used together.

The foundation crushed stone 6 is laid on the lightweight embankment 5 while carefully rolling it, and the leveling concrete 7 is placed on the foundation crushed stone 6 to have a predetermined thickness. A finish 9 such as asphalt pavement is provided on the top of the road so that it has substantially the same running characteristics as an unpaved road.

Example 2. FIG. 4 shows another embodiment of the reinforced soil arch structure according to the present invention. In the figure, the same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The left and right side panels 3, 3 are these side panels 3
Reinforcing bars 10 (see FIG. 3) continuously penetrating vertically in the vertical direction and the concavo-convex portions formed at the left and right edge portions of each side panel 3.
The 3a and 3a are meshed with each other to be connected in the vertical and horizontal directions. The other structure is exactly the same as that of the first embodiment.

[0025]

The present invention is constructed as described above, and the reinforced soil arch structure according to the present invention has bridge piers constructed at predetermined intervals, arch-shaped bridge girders installed between the piers, and this bridge girder. The left and right sides of the plurality of left and right side panels that are stacked while being connected to each other, a plurality of connecting members that connect the left and right side panels, and a lightweight embankment filled between the left and right side panels. Therefore, the workability is extremely better than that of the conventional reinforced concrete construction method, and the running characteristics of the vehicle are also very good due to the cushioning effect of the lightweight embankment material. It has the effect of improving the earthquake resistance by reducing the weight.

Further, the bridge girder is constructed by joining a plurality of arch beams made of prestressed concrete in an arch shape in the width direction of the bridge girder and integrally connecting them by a plurality of connecting members. There is also an effect that the width of the bridge girder can be set arbitrarily according to the scale.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a reinforced soil arch structure according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a partially cutaway side view showing an installed state of a side panel.

FIG. 4 is a side view showing another embodiment of the reinforced soil arch structure according to the present invention.

[Explanation of symbols]

1 ... Bridge pier, 2 ... Bridge girder, 3 ... Side panel, 4 ... Tie bolt (connecting member), 5 ... Light embankment material, 6 ... Foundation crushed stone, 7 ...
Leveling concrete, 8 ... handrail, 9 ... finish, 10 ... reinforcing bar, 11 ... mortar.

Claims (2)

[Claims] 1. A bridge pier constructed at predetermined intervals, an arch-shaped bridge girder installed between the piers, and a plurality of left and right side panels that are stacked while being connected to each other on the left and right sides of the bridge girder, A reinforced earth arch structure constructed by including a plurality of connecting members for connecting the left and right side panels and a lightweight embankment material filled between the left and right side panels. 2. The bridge girder is constructed by joining a plurality of arch beams constructed in an arch shape from prestressed concrete in the width direction of the bridge girder and integrally connecting them with a plurality of connecting members. The reinforced soil arch structure according to claim 1, wherein: