JPH0772420B2 - Concrete block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a concrete such as a retaining wall block, a drainage channel block, a shelf channel block, and a box culvert, which are used when making a retaining wall, a drainage channel, a drainage tunnel and the like. It relates to blocks.

[Conventional technology]

Conventionally, for example, when constructing a retaining wall block, this retaining wall block is dropped on a base (crushed stone) with a truck crane, etc. , The right and left side edge parts of the retaining wall plate are correctly butted, but the base is not always flat, so it is not possible to align the front side of the upper retaining wall plate with the right and left side edges of the respective retaining wall plates correctly aligned. It was extremely difficult.

Therefore, the retaining wall block is lifted with a truck crane or the like every time construction is performed, and an intervening object is interposed between the base and the base plate so that the side edges are correctly abutted and the front surface of the retaining wall plate is flush. Although it was corrected, it became a very troublesome work, and there was a drawback that the work efficiency was reduced accordingly.

[Problems to be Solved by the Invention]

The present invention solves such a drawback, and a concrete block that can be easily and correctly installed at a predetermined position by swinging or sliding about a protrusion as a fulcrum without using a crane or the like. Providing is a technical challenge.

[Means for Solving the Problems]

The structure will be described with reference to the accompanying drawings. Concrete characterized in that one or a plurality of protrusions 2 are formed so as to project at or near the center of gravity of the lower surface 1'of the base plate 1 of the block body a. It relates to blocks.

[Work]

An example of the retaining wall block will be described. A truck crane or the like suspends the block body a on the base 3 so that the left and right end portions of the retaining wall plate 4 can be correctly abutted with each other and the front and rear positions are aligned with a predetermined position. To do.

At this time, when the block body a is slightly displaced from the predetermined position, the block 2a is slightly raised above the base 3 with the protrusion 2 formed on the lower surface 1'of the base plate 1 as a fulcrum. Since it is placed, the lower surface 1 ′ of the base plate 1 is rocked more than when it is placed exactly on the base 3,
Easy to slide.

Therefore, it is possible to easily correct the correct position and correct state.

For example, it is easy to align the front surface of the retaining wall plate 4 flush with the correct inclination state, or to align the left and right with the adjacent block body a.

〔Example〕

A block body a in the drawing shows a case where a retaining wall 5 is integrally provided on two back portions of the retaining wall plate 4.

The protrusion 2 in the drawing is simply the base plate 1 in concrete molding.
The case where the projection 2 is integrally formed on the lower surface 1 ′ of the above is illustrated. However, as shown in FIG. May be formed.

In any case, if you correct it to the correct position and correct posture, insert pebbles into the gap 8 between the base plate 1 and the base 3 to maintain that state, or use an appropriate spacer 7 to hold the posture and keep the gap. 8 is filled with concrete and fixed on the base 3.

In order to set this block body a in a correct state, it is desirable to use a spirit level together.

As a result of repeated tests by the applicant, the protrusion 2 is the base plate 1
It has been confirmed that a sufficient effect can be exhibited by projecting about 2 cm from the lower surface 1'of.

When the block body a is large, the number of the projections 2 is not one, but a plurality of the projections 2 are scattered in the vicinity of the center of gravity so as to withstand the load.

〔The invention's effect〕

Since the present invention is configured as described above, for example, the retaining wall block is placed on the base, the right and left side end portions of the retaining wall plate are exactly abutted with each other, and the front surface of the retaining wall plate is in the correct position. When installed side by side in the correct posture, the block body can be rocked with a slight force and can be slid with a slight force because only the protrusion is supported on the base. Become.

Therefore, it is also possible to properly join neighboring block bodies,
In addition, it is easy to make the wall surfaces of the neighbors flush with each other without using a truck crane or the like, so that the construction efficiency is significantly improved.

In addition, since a protrusion is formed on the lower surface of the base plate of the block body, even if a gap is created between the base plate and the base, if concrete is poured into this gap, the block body will be supported on the base without any support. Can be fixed.

Thus, the present invention is particularly effective for large concrete blocks.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a vertical sectional side view of a block body, FIG. 2 is a sectional view of an essential part, FIG. 3 is a sectional view of an essential part of another example, and FIG. Bottom view, FIG. 5 is a bottom view of another example. a ... Block body, 1 ... base plate, 1 '... bottom surface, 2 ...
Protrusion.

Claims (1)

[Claims] 1. A concrete block characterized in that one or a plurality of projecting portions are formed so as to project at or near a center of gravity of a lower surface of a base plate of a block body.