JP2000170120A - Full web type arch structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a full web type arch structure capable of stabilizing a side wall part and thinning the wall thickness of the side wall part. SOLUTION: The width direction end of an arch rib 2 is made to overhang a side wall part 4 sideward, and the overhang 3 of an arch rib being a part of the arch rib 2 is provided. Furthermore, a support wall 5 connecting between the upper face of the overhang 3 and the outer face of the side wall part 4 is provided, and soil pressure applied on the side wall part 4 is taken over the arch rib 2 through a support wall 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filled arch structure such as a filled arch bridge in which a backfill material such as earth and sand is filled.

[0002]

2. Description of the Related Art In the structure of a full-filled arch bridge, which is one of the full-filled arch structures, conventionally, side walls rise from both ends in the width direction of the arch rib, and are formed by the arch rib and a pair of side walls. Is filled with backfill soil. On the backfill soil, a structure such as a road floor plate is laid.

[0003]

In the above-mentioned filling-type arch bridge, since the earth pressure of the filled backfill soil is received by the side wall, the side wall is so formed as to be able to receive the earth pressure. Therefore, there is a problem that the dead load of the arch bridge increases as the target arch bridge becomes larger.

In addition, since the side wall receiving the earth pressure is supported by the arch rib at the lower end thereof, a required strength is required at the joint between the arch rib and the side wall. The present invention
The present invention has been made in view of the above problems, and has as its object to provide a full-filled arch structure capable of stabilizing a side wall portion and reducing the wall thickness of the side wall portion.

[0005]

In order to solve the above-mentioned problems, the present invention provides an arch rib, a pair of side walls rising from both sides in the width direction of the arch rib, and a space formed by the arch rib and the pair of side walls. In a filled arch structure composed of backfill material such as earth and sand or concrete filled in the arch ribs, the arch ribs are formed so that the width direction ends of the arch ribs protrude laterally beyond the side walls. And a supporting wall connecting the upper surface of the overhang portion and the outer surface of the side wall portion.

According to the present invention, the load received by the side wall portion from the backfill material is transmitted from the outer surface of the side wall portion to the support wall, and the load transmitted to the support wall is supported by the projecting portion of the arch rib. Thus, the earth pressure applied to the side wall portion is shared by the arch ribs.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a full-filled arch bridge will be described as an example, but a similar configuration can be applied to other full-filled arch structures.

As shown in FIG. 1 which is a cross-sectional view, side wall portions 4 stand up from both sides in the width direction of an arch rib 2, and the arch rib 2 and a pair of side wall portions 4 of the satiety type arch bridge 1 according to the present embodiment. Is filled with backfill soil 6 (backfill material).

However, both sides in the width direction of the arch rib 2 project laterally beyond the side wall portion 4, respectively.
Is formed as an overhang 3 of the arch rib.
On the basis of the overhang 3 of the arch rib, the side wall 4
A support wall 5 is provided between the outer surface of the arch rib and the projecting portion 3 of the arch rib, and the outer surface of the side wall portion 4 and the upper surface of the projecting portion 3 of the arch rib are connected.

The support wall 5 is provided at right angles to the outer surface of the side wall 4, that is, at right angles to the earth pressure.
Are arranged at predetermined intervals. By providing the support wall 5 and the projecting portion 3 of the arch rib as described above, the earth pressure applied to the side wall 4 from the backfill soil 6 is transmitted to the support wall 5 and shared by the arch rib 2.

As a result, the wall thickness of the side wall portion 4 can be designed to be thin, and the weight of the suffocated arch bridge 1 can be reduced.
Here, the load transmitted to the support wall 5 is transmitted to the protruding portion 3 of the arch rib and is supported by the protruding portion 3 of the arch rib. However, since the protruding portion 3 has an arch shape, The transmitted load can be reliably supported.

A side wall 4 (not shown) having the same form and function as the support wall 5 may be provided inside the side wall 4 as needed to further reinforce the side wall 4. Next, FIG. 2 shows an example in which the full-bodied arch bridge 1 having the above configuration is adopted. In this example, the amount of overhang of the arch rib overhang 3 from the side wall 4 is set to be larger at the end side than at the center in the longitudinal direction of the arch rib 2 and the arch rib 2
This is an example in which the support wall 5 is provided in the vicinity of both ends in the longitudinal direction.

In general, in the arch bridge 1, the height of the side wall portion 4 is higher at the longitudinal end portion than at the longitudinal center portion of the arch bridge 1, and the height at the longitudinal end portion is higher. Earth pressure increases. For this reason, in this example, the supporting wall 5 is provided at that portion to stabilize the side wall portion 4.

[0014]

As described above, when the present invention is employed, by providing the protruding portion of the arch rib and the support wall, the earth pressure on the side wall portion of the full-filled arch structure can be reduced via the support wall. Therefore, there is an effect that the stability of the side wall portion is improved, and the wall thickness of the side wall portion can be designed to be thinner than before.

Further, there is a secondary effect that the aesthetic appearance of a filled arch structure such as a filled arch bridge is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a satiety arch bridge according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an installation example of a full-bodied arch bridge according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filled arch bridge 2 Arch rib 3 Overhang of arch rib 4 Side wall part 5 Support wall 6 Backfill soil (backfill material)

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yukio Akashi 5-1-1, Sumiyoshi, Tokushima City, Tokushima Prefecture F-term (reference) 2D059 BB31 GG55

Claims (1)

[Claims] 1. An arch rib, a pair of side walls rising from both sides in the width direction of the arch rib, and a backing material such as earth and sand or concrete filled in a space formed by the arch rib and the pair of side walls. In the abdominal arch structure, an overhang portion of the arch rib formed so that the width direction end of the arch rib projects laterally from the side wall portion is provided, and the overhang portion upper surface and the outer surface of the side wall portion are provided. A full-filled arch structure comprising a support wall connecting between the arches.