JPH0554540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fastening tool for fastening together foam blocks in a construction made of stacked synthetic resin foam blocks.

(Prior Art) A construction method is currently being attempted in which foamed synthetic resin blocks are stacked on soft ground and a road is laid on top of them. According to this construction method, the lightweight nature of the foam blocks prevents ground subsidence and enables rapid construction.

In addition, on land with steps, foam blocks are stacked in an inverted triangle shape at the boundary between the listed and lowered areas to reduce horizontal earth pressure and make the slope of the retaining wall that covers the steps closer to vertical. The present inventors have already proposed a construction method that aims to improve the degree of land use by expanding the area.

(Problems to be Solved by the Invention) In the embankment in which the foam blocks are stacked, it is important that the stacked foam blocks have good integrity and have a stable stacked structure that does not shift from one another.

As a means of securing laminated foam blocks,
A device has also been proposed in which a cut is made in the edge of a metal plate, the cut is raised to form a claw, and each claw is stuck into an adjacent foam block to be fastened (Japanese Patent Laid-Open No. 62-41822 (see publication), but
In the previously proposed claws, the individual claws are simply bent at equal angles, and therefore cannot be considered as a sufficient fastening means that takes into account the possibility of preventing slippage.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fastening tool that can fasten foam blocks together and improve the integrity of stacked foam blocks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that a plurality of comb-shaped claws with sharp tips are formed on the edge of one metal plate, and A plurality of claws are bent at non-uniform bending angles, and the claws bite into two or more foam blocks to tightly connect the foam blocks to each other.

(Example) An example of the present invention will be described below based on the drawings.

As shown in FIG. 6, foam blocks 1 are stacked and a road 2 is laid on top of them. Here, the foamed block is a block molded product of synthetic resin such as foamed polystyrene, foamed polyethylene, foamed urethane, etc., and foamed polyethylene (foamed polystyrene) is particularly desirable because it is inexpensive.

This construction is done as follows.

A concrete block 4A is installed on the ground 3 on the lower side of the land with steps, and a permeable sandy soil layer 5 is laid on top of the concrete block 4A.

Foam blocks 1 are stacked on top of this sandy soil layer 5. The foam blocks 1 are fastened to each other by a fastening tool 6. This binding tool 6 will be explained in detail later.

The boundary between the foam block 1 and the earth pressure acting end surface 7 of the difference is filled with a foam block backfilling material 8 made of a mixture of natural earth and sand and foamed particles of synthetic resin. Such a mixture is used for the earth pressure acting end surface 7.
This is to eliminate the inconvenience caused by the difference in the properties of the foam block 1 and the foam block 1, and to maintain continuity between the natural soil and the foam block.

A formwork 10 is installed on the edge of the stacked foam blocks 1, and a concrete slab 11 is cast on site by filling the formwork 10.
This listed concrete version 11 is a foam block 1
This will improve the integrity of the

A concrete block 4B is placed on the edge of this listed concrete slab 11 and fixed with bolts 12. A permeable sandy soil layer 13 is laid on top of it, and a road 2 paved with concrete or asphalt is further laid on top of it. The upper concrete block 4B is the same as the lower concrete block 4A, and is installed upside down.

The upper and lower ends of a cover 14 made of a corrugated iron plate are fixed between the upper concrete block 4B and the lower concrete block 4A with bolts 15 and 16. This cover 14 is made of foam block 1
The foam block 1 is coated with UV rays to prevent the foam block 1 from being exposed to ultraviolet rays, thereby preventing deterioration of the foam block 1.

Drainage from the upper sandy soil layer 13 comes out of the drain 17 of the upper concrete block 4B and falls through the wall 18 of the foam block 1 and the gap 19 inside the cover 14. Then, the water flows down the foam block backfill material 8 and passes through the sandy soil layer 13 below, as well as the water drain 20 of the concrete block 4A below.
is discharged from.

The foam block construction constructed in this way is
Since the foam block 1 is extremely lightweight, ground subsidence can be prevented. In addition, when installed at the boundary of land with steps, the slope of the retaining wall (corresponding to cover 14) can be made closer to vertical, which can improve the utilization of listed land. becomes.

In the above-described foam block structure, the foam blocks 1 are fastened together by a fastener 6. This fastener 6 will be explained in detail next.

Referring to FIG. 2, the fastening tool 6 is made by cutting a metal plate 21 such as an iron plate into a rectangular shape, and forming a plurality of comb-shaped claws 23 with sharp tips at intervals of 2 on each side edge. ing. All of these claws 23 are bent in one direction, or some of them are bent in one direction and the rest are bent in the opposite direction. The claw 23 bites into the foam block 1.

As shown in FIGS. 3A and 3B, by making the condition of each pawl 23 non-uniform, the tightened state can be made stronger.

A is the extended direction angle α of the claw 23 and the proximal width h
The bending angle θ is made non-uniform, and the bending angle θ is made non-uniform. When making these stretching direction angle, proximal width, and bending angle non-uniform, it is not necessarily necessary to make all of them non-uniform, and it is sufficient to make any one of them non-uniform. The present invention does not exclude cases where two or more of them are made non-uniform.

Returning to FIG. 2, in the center of the metal plate 22 there is a fifth
Hole 2 for passing steel rod 26 for anchor as shown in the figure
5 is provided.

The state of use of this fastener 6 is shown in FIGS. 1, 4, and 5. 1 shows part A of FIG. 6, FIG. 4 shows part B of FIG. 6, and FIG. 5 shows part C of FIG. 6.

Referring to FIG. 1, the claws 23 of the fastening tool 6 are bent in one direction and the opposite direction, and the claws 23 bite into the upper and lower foam blocks 1 to tighten them.

Referring to FIG. 1, the claws 23 of the fastening tool 6 are bent in one direction and the opposite direction, and the claws 23 bite into the upper and lower foam blocks 1 to tighten them.

In the case shown in FIG. 4, the upper and lower foam blocks 1 are tightly bound together on the wall surface 18 of the foam block 1, and the displacement (protrusion) of the seam of the foam blocks 1 is regulated. In this case, claw 23
is bent only in one direction.

Similarly, in the case shown in FIG.
The upper and lower foam blocks 1 are tightly connected at the wall surface 18 of the block 1, and a steel rod 24 is passed through them as follows. The steel rod 24 passed through the hole 25 of the fastening device 6 is passed through the boundary between the upper and lower foam blocks 1, and its end is engaged with a pile 26 in the earth pressure acting end surface 7, as shown in FIG. 6, and becomes an anchor. ing. The other end of the steel rod 24 passes through the cover 14 and a spacer 27 interposed in the gap 19 between the wall surface 18 and the cover 14,
It is tightened and fixed by a nut 28 on the outside. This further improves the integrity of the foam block 1. Hole 25 of tying tool 6
In addition to steel rods, the foam block 1 can also be reinforced through reinforcing bars (not shown).

However, the present invention is not limited to the above embodiments.

For example, as shown in FIG. 7, the claw 23 of the fastening tool 6 may be bent by forming a claw 23A inside the metal plate 21, as shown in FIG. 7, instead of around the metal plate 21. In this case, since the number of claws 23 is large, the fastening force is large.

In addition, the foam block structure to which the present invention is applied is not limited to embankments for preventing subsidence on soft ground, but also retaining walls that utilize the self-supporting properties of stacked foam blocks, and structures placed on the side of structures. It is used in a broad sense, including those that reduce the earth pressure that acts on the earth.

(Effects of the Invention) The present invention is characterized in that the claw formed on the edge of the metal plate is bent in one direction or in the opposite direction, and any one or more of the extension angle, base width, and bending angle of the claw is considered to be uneven.

Therefore, according to the present invention, the foam blocks can be bonded together, the integrity of the stacked foam blocks can be improved, and the stability of the foam block structure can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a usage state of an embodiment of the present invention. FIG. 2 is a plan view of the embodiment. In FIG. 3, A is a front view of the claw of the embodiment, and FIG. 3B is a side view of the claw. FIG. 4 is a sectional view showing another example of another usage state of the embodiment. FIG. 5 is a sectional view showing an example of still another usage state. FIG. 6 is a cross-sectional view of the foam block structure. FIG. 7 is a perspective view of another embodiment of the invention. 1...Foam block, 21...Metal plate, 23...Claw.

Claims (1)

[Claims] 1 A plurality of comb-like claws with sharp tips are formed on the edge of a single metal plate, and any one or more of the extension angle, base width, and bending angle of the plurality of claws are made uneven. A fastening tool for a synthetic resin foam block construction, characterized in that the claws bite into two or more foam blocks to fasten the foam blocks together.