JPH0453216B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is used for drainage treatment, earth retaining, and fixing of covers covering foam blocks in structures such as embankments and retaining walls made of synthetic resin foam blocks. Concerning the concrete blocks that will be installed for this purpose.

(Prior Art) Currently being attempted is a construction method in which foam blocks made of synthetic resin are stacked on soft ground and a road is laid on top of the blocks. This construction method prevents ground subsidence due to the lightweight nature of the foam blocks, and also enables quick and low-cost construction.

In addition, on land with level differences, foam blocks are stacked in an inverted triangle shape on the land below the boundary of the level difference to reduce horizontal earth pressure and make the slope of the retaining wall closer to vertical, thereby increasing the use of listed land. The inventors of the present invention have also proposed a construction product that improves the degree of damage.

(Problems to be Solved by the Invention) In the embankment using the foam blocks described above, drainage treatment becomes a problem because the foam blocks are impermeable to water.

In addition, roads built on foam block embankments must be earth-retained.

Furthermore, since foam blocks deteriorate when exposed to ultraviolet light, the walls of the foam blocks must be covered with a sun-blocking cover.

It is desirable to minimize the number of types of concrete blocks used in road construction, etc. to reduce errors during construction. Therefore, common use of construction parts is an important design issue.

SUMMARY OF THE INVENTION Therefore, the purpose of the present invention is to improve wastewater treatment in road embankments, retaining walls, and other foam block structures in general.
To provide a concrete block having multiple functions and uses such as earth retaining and wall cover fixing.

[Means for solving problems]

In order to achieve the above object, the present invention is configured as follows.

It is formed into a substantially T-shaped cross section, has a first side and a second side that are substantially on the same plane, and further has a third side rising from the boundary between the first side and the second side. a concrete block having: a hole provided through the second side; a hole provided through the third side; and a hole provided through the base end of the third side. In a structure formed by stacking foam blocks, the concrete block is placed upside down vertically and horizontally on the lower surface of the outer end surface of the foam block, and the second side and the third side of the concrete block It is made by fixing a cover that covers the outer end surface of the foam block in the hole between the side and the top and bottom.

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

1 and 2 show a foam block construction in which concrete blocks according to the invention are used. In this example, a road embankment is exemplified as a foam block structure, but the foam block structure of the present invention is not limited to this. It also includes embankments.

Foam blocks 2 are stacked on soft ground 1,
Road 3 will be built on top of it. Here, the foamed block 2 is a block molded product of synthetic resin such as foamed polystyrene, foamed polyethylene, foamed urethane, etc., and foamed polyethylene (foamed styrene) is particularly desirable because it is inexpensive.

This construction is performed as follows.

Prefabricated concrete blocks 4A are placed against the ground 1 in the depth direction of the diagram, and foam blocks 2 are stacked on top of them.

This concrete block 4A is constructed as shown in FIG.

With reference to FIG. 3, it is formed into a substantially T-shaped cross section,
A third side 7 stands up from the first side 5 and the second side 6. The first side and the second side are substantially on the same plane, the third side rising from the boundary between the first side and the second side is the longest, and the second side 6 is the shortest.

The angle formed by the first side 5 and the third side 7 is made equal to the slope of the wall surface 16 of the foam block construction, which will be described later.

On the first side 5 side at the tip of the third side 7,
A stepped portion 8 is formed, and a plurality of holes 10 are provided in the narrow tip portion 9 in the longitudinal direction of the block. or,
The second side 6 has a plurality of holes 1 in the longitudinal direction of the block.
1 is provided.

Near the intersection 12 of the three sides, that is, at the rising base end of the third side 7, there is a space 13 between the first side 5 and the third side 7 to the second side 6 and the third side 7. A plurality of water drains 15 communicating with the space 14 between the blocks are penetrated in the longitudinal direction of the block.

The concrete block 4A constructed in this manner is installed with the first side 5 located on the lower surface of the foam block 2 and the third side 7 provided with a gap in front of the wall surface 16 of the foam block 2. In other words,
Here, the concrete block 4A is used as an inverted T-shaped retaining wall with the first side 5 and the second side 6 as the bottom plate and the third side 7 as the front wall.

A geotextile 17, which is a water-permeable synthetic fiber or synthetic resin material, is inserted into the gap between the wall surface 16 and the third side 7.

A differential soil layer 18 with good water permeability is laid on top of this concrete block 4A.

Foam blocks 2 are stacked vertically and horizontally on this sandy soil layer 18. The foam blocks 2 are fastened to each other by fasteners 19A and 19B. The fasteners 19A and 19B are used by bending a claw 20 formed on the edge of a metal plate such as an iron plate, and biting the claw 20 into the foam block 2. this house,
The fastening tool 19A has a claw 20 bent in the opposite direction, and is used for fastening the inside of the foam block 2 construct. On the other hand, the fastening tool 19B has claws 20 bent in one direction, and is used for fastening the wall surface 16 of the foam block 2 construct.

A foam block backfilling material 22 made of a mixture of natural earth and sand and synthetic resin foam particles is filled between the foam block 2 and the ground 21 behind it. The reason for using such a mixture is to eliminate the inconvenience caused by direct contact between the earth 21 and the foam block 2, which have different properties, and to provide continuity of the materials.

At the stage when the foam blocks 2 are stacked up to a halfway height, the following anchor device is provided to prevent the foam blocks 2 from protruding or popping out from the wall surface 16.

Tension members 23 made of steel rods, iron bands, etc. are arranged horizontally on the foam block 2 at regular intervals in the depth direction. A pile 25 is driven into a step 24 formed on the slope of the ground 21, and a tension member 23 is attached to the pile 25.
A hook-shaped ground fixing portion 26 provided at one end of the ground is engaged and fixed.

On the other hand, the other end 27 of the tension member 23 projects from the wall surface 16. Said tying tool 19B
The other end 27 of the tension member 23 is passed through the hole 28 in the center of the foam block 2, and the claw 20 is bitten into the foam block 2. Next, a spacer 29 is passed through the other end 27,
The other end 27 is passed through a cover 36 (described later) that covers the wall surface 16, and the other end 27 is inserted outside the cover 36.
A nut 31 is screwed onto the threaded portion 30 of the holder. The tightening force of the nut 31 is
9. Acts on the wall surface 16 of the foam block 2 via the fastener 19B to restrict the wall surface 16.

As a result, the tension member 23 pulls the foam block 2 from behind, thereby stabilizing the wall surface 6 of the foam block 2.

A foam block 2 is further stacked on top of this anchor device, and a formwork 33 is installed on the edge of the foam block 2 on the exposed 32 of the foam block 2.
The concrete floor slab 34 with reinforced concrete will be poured on-site. This listed concrete floor slab 34 improves the integrity of the foam block 2,
The entire foam block construction is stabilized.

At the edge of this listed concrete slab 34, a concrete block 4B, which is the same as the concrete block 4A, is installed with the length and width of the concrete block 4A reversed and facing each other in the depth direction.
That is, the third side 7 of the concrete block 4B lies on the listed concrete floor slab 34, the first side 5 stands up, and the second side 6 faces downward with a distance from the wall surface 16. It will be done. Hole 10 on third side 7
Bolt 35 is passed through the listed concrete slab 3.
It is fixed at 4.

In other words, here, concrete block 4B
is used as an L-shaped retaining wall with the third side 7 as the bottom plate and the first side 5 as the front wall.

A cover 36 made of a corrugated iron plate is fixed between the second side 6 of the upper concrete block 4B and the stepped portion 8 of the third side 7 of the lower concrete block 4A. That is, the upper end of the cover 36 has the hole 1
1, and the lower end is fixed by a bolt 38 passed through hole 10. This cover 36 covers the wall surface 1 of the foam block 2.
6 to prevent the foam block 2 from being exposed to ultraviolet rays and prevent the foam block 2 from deteriorating.

A permeable sandy soil layer 39 is laid on top of the concrete block 4B, and a road 3 paved with concrete or asphalt is further laid thereon.

The sandy soil layer 18 laid under the foam block 2 and the sandy soil layer 39 laid over the foam block 2 are provided for drainage.

Drainage from the upper sandy soil layer 39 flows through the drain 15 of the concrete block 4B through the gap 40 between the wall surface 16 and the cover 36, and permeates through the geotextile 17. Then, the water flows through the foam block backfilling material 22 and flows out from the drain 15 of the concrete block 4A together with the waste water that permeates the sandy soil layer 18 below.

As mentioned above, the lower concrete block 4A
serves as an earth retainer for the sandy soil layer 18, and the upper concrete block 4B functions as an earth retainer for the sandy soil layer 39 and the road 3.

(Effects of the invention) It can be installed on the bottom surface of stacked foam blocks and on the exposed surface, and can be used as a retaining wall for earth retaining.

Drainage water, including drainage from the drainage channels of the concrete blocks installed above, flows out from the drains of the concrete blocks installed below.

By fixing the top and bottom ends of the foam block covers between the concrete blocks installed above and the concrete blocks installed below, the foam blocks are prevented from being exposed to ultraviolet rays and deterioration of the foam blocks is prevented. It can be prevented.

It is economical because the concrete block has multiple functions such as drainage, earth retaining, and fixing the cover for covering the foam block, and can be used simply by installing the same block vertically and horizontally.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a concrete block in use according to an embodiment of the present invention, and is a diagram showing a part of FIG. 2. FIG. 2 is an overall view of FIG. 1. FIG. 3 is a perspective view of the above embodiment. 2: Foam block, 3: Road, 4A, 4B: Concrete block, 5: First side, 6: Second side, 7: Third side, 10, 11: Hole, 12: Intersection, 13, 14 : Space, 15: Drainage, 18,3
9: sandy soil layer, 35, 37, 38: bolt, 3
6: Cover.

Claims (1)

[Scope of Claims] 1. It is formed into a substantially T-shaped cross section, and has a first side and a second side that are substantially on the same plane, and further extends from the boundary between the first side and the second side. a concrete block having a third side that stands up; a hole provided through the second side; a hole provided through the third side; and a base end of the third side. and a water drain provided through the concrete block, and the concrete block is installed upside down on the lower surface of the outer end surface of the foam block in a structure made of stacked foam blocks, and the concrete block is installed vertically and horizontally, and A concrete block for use in a foam block construction, characterized in that a cover for covering the outer end face of the foam block is fixed at the top and bottom to holes between the side and the third side.