JPH0527724B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a synthetic resin foam block used for constructing embankments, retaining walls, etc.

(Prior Art) Currently being attempted is a construction method in which foamed synthetic resin blocks are stacked on soft ground and a road is built on top of them.

This construction method has the advantages of being able to prevent ground subsidence due to the lightweight nature of the foam blocks, and allowing for quick construction.

In addition, on land with steps, it is desirable to make the slope of the retaining wall at the step closer to vertical in order to make effective use of the listed land. Therefore, the present inventors have proposed a construction method in which foam blocks are stacked on the land below to reduce the horizontal earth pressure and make the slope of the retaining wall closer to vertical.

(Problems to be Solved by the Invention) However, the foam block is a foamed molded product of synthetic resin such as expanded polystyrene, and has resistance to compressive loads but no resistance to tensile loads. Therefore, when a tensile load was applied to the foam block construction, there was a risk that the foam block would break.

It is therefore an object of the present invention to provide a synthetic resin foam block for construction that is resistant to tensile loads.

(Means for Solving the Problems) In order to achieve the above object, a reinforcing member made of a bendable material that resists tensile loads is embedded in the synthetic resin foam block of the present invention.

(Example) An example of the present invention will be described below based on the drawings. In this embodiment, a road embankment is exemplified as a foam block structure, but the foam block structure is not limited to this.

First, a road embankment is illustrated as an example of a foam block construction in FIG.

Foam blocks 2 made of synthetic resin such as expanded polystyrene (styrene foam) are stacked vertically and horizontally on a soft ground 1, and a road 3 paved with concrete or asphalt is laid on top of the blocks 2.

The embankment using the foam blocks 2 has the advantage that ground subsidence can be prevented because the foam blocks 2 are lightweight, and construction can be performed more quickly than other construction methods, such as when replacing the soil on the land.

The foam blocks 2 are fastened to each other by a fastener 4. The fastener 4 has claws 4a around the metal plate.
are bent, and the claws 4a bite into adjacent foam blocks 2 to tightly connect the foam blocks 2 to each other. Also, road 3 and foam block 2
The T-shaped fitting 5 improves the bondability.

The outer periphery of the foamed block 2 in the lower stage X is covered with a restraining material 6 made of a mesh material having tensile resistance such as a wire mesh, a net, or a rope. This maintains the integrity of the foam blocks 2 in the lower stage
In addition to preventing uneven settlement,
This is to increase resistance to bending stress generated in the foam block 2 due to traffic loads. In this embodiment, in order to improve construction efficiency, the restraining material 6 covering the lower stage X is divided into a plurality of restraining materials 6a, 6b, .

Further, the restraining material 6 covers the wall surface 8 of the foam blocks 2 in the lower stage X and the upper stage (including the middle stage) Y, and also prevents the foam blocks 2 from protruding or popping out from the wall surface 8.

By the way, the foam block 2 is a foam made of synthetic resin such as foamed polystyrene (styrene foam), foamed polyethylene, and foamed urethane. This synthetic resin foam has a property of being resistant to compressive loads, but weak to tensile loads. Therefore, there is a risk that the foam block 2 will break due to the tensile load of a car traveling on the road 3.

Therefore, in order to resist the tensile load, as shown in Fig. 1, reinforcing structural members 9 made of a bendable and tensile resistant material such as wire mesh are buried in two horizontal stages in the foam block. It is.

The foam block 2 of the present invention is manufactured, for example, as follows. That is, particles (beads) of polystyrene or the like containing a blowing agent are first foamed, then allowed to ferment, then placed in a mold and heated with steam to re-foam, allowed to grow, the beads are fused and integrated, and then cooled. Manufactured by A reinforcing member 9 is provided during refoaming in the mold.

Note that the present invention is not limited to the embodiments described above.

For example, the reinforcing member is not limited to wire mesh, but may be any material that is bendable and has tensile resistance, such as a soft synthetic resin sheet member, cloth, or rubber.

Structures using foam blocks are not limited to road embankments, but can be applied to a variety of other things, such as retaining walls or structures in which foam blocks are placed on the side of a structure to reduce earth pressure acting on the structure.

(Effects of the Invention) Since the foam block of the present invention is embedded with a reinforcing member made of a bendable material that resists tensile loads, it is strong against tensile loads and the durability of the foam block is improved. Therefore, when used as a road or land embankment, it prevents uneven subsidence of the ground and becomes stable over a long period of time.

Furthermore, since the reinforcing member is a bendable member, the applied load is dispersed, and there is no breakage due to load concentration.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a foam block according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the foam block construction of FIG. 1: Road, 2: Foam block, 9: Reinforcement member.

Claims (1)

[Scope of Claims] 1. A foam block used in a construction method in which foam blocks made of synthetic resin are stacked vertically and horizontally to reduce earth pressure in the vertical and horizontal directions, wherein the foam blocks are bendable to resist tensile loads. A synthetic resin foam block for construction, characterized by having a reinforcing member made of a material embedded therein.