JPH0332615Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a small drainage ditch installed at the entrance of a so-called gas station.

[Prior art] Drainage ditches are installed at the entrance of gas stations (the boundary from the pedestrian path to the paved premises of the gas station) to drain water from car washes or rainwater, etc. Due to the constant traffic of heavy vehicles,
The width of this drainage ditch is made relatively small and a strong structure is required.

The structure of the conventional drainage ditch is as shown in Figure 6.
Generally, the construction is carried out by arranging two rows of pedestrian and roadway blocks 20 and forming grooves 21.

However, according to this drainage ditch structure, the construction work to level the blocks 20 facing each other is time-consuming, and the blocks 20 and the concrete floor 22 do not fit well, and heavy vehicles come and go. This has the disadvantage that the bond is broken, the blocks 20 are lifted up, or the concrete floor 22 is cracked.

[Purpose of the present invention] In view of the above-mentioned circumstances, the purpose of the present invention is to provide a drain block for gas station drains that can be constructed more rationally and that does not cause separation from the concrete floor (technical). assignment).

[Structure and operation of the present invention] In order to achieve the above object, the drain block of the present invention adopts the following structure (technical means). That is, in a precast concrete drainage ditch block which is composed of opposing side walls 1, 1 and a bottom part 2, and has a U-shaped cross section with a cut groove 4 formed in the longitudinal direction of the center, both outer sides of the upper edge It is characterized in that triangular protrusions 5 are formed in the longitudinal direction.

A drainage ditch is formed by sequentially arranging these precast concrete drainage ditch blocks.

Even when the drain block is affected by the coming and going of vehicles, the triangular protrusions 5 on the outer side of the upper edge of the block engage with the earthen concrete floor and do not cause peeling.

[Effects] The precast concrete drain block of the present invention has the above-described structure and functions, and therefore has the following unique effects.

Since this drain block is manufactured in a factory, the quality is uniform and a certain standard can be obtained, resulting in improved construction accuracy.

Since peeling between the main drainage ditch block and the earthen floor concrete is difficult to occur, there is no damage to the main drainage ditch block or the earthen floor concrete, and their durability is improved.

[Example] Hereinafter, an example of the drain block of the present invention will be described based on the drawings.

1 to 3 show one embodiment thereof.

This drain block H is made of concrete, and has opposing side walls 1, 1 and a bottom 2.
It is integrally formed in the shape of a letter, and the reinforcing bar net (meshyu) 3
Reinforced accordingly. A cut groove 4 is formed in the central longitudinal direction of the U-shaped portion, through which drainage water flows down. The cross-sectional shape of this drain block H is formed into a U-shape that opens slightly upward as shown.

Triangular protrusions 5 having a substantially triangular shape in the longitudinal direction are formed on both outer sides of the upper edge of the side wall portion 1 .
That is, the upper side portion 5a of the triangular protrusion 5 is formed as a slope that gradually widens as it reaches the bottom, and the lower side portion (jaw portion) 5b is formed as a slope that continues to the outer surface of the side wall portion 1 at a steeper angle than the lower end of the upper side portion 5a. be done. This triangular protrusion 5 occupies 1/3 to 1/4 of the height h of the side wall portion 1.

The end of this drain block H may be formed into a flat surface as shown in FIG. 2, but as shown in FIGS.
As shown in the figure, both ends have protrusions 7 that engage each other.
and a recess 8 can also be formed.

This drain block H is relatively small in cross-sectional size and length, and is manufactured in a factory as a so-called precast product.

Incidentally, to show an example of the specifications of this drain block H (see Figures 1 and 2), the width B is 26 cm, the bottom width b is 20 cm, the height h is 23 cm, and the length l is 80 cm. The wall thickness is 5.7 cm at the side wall portion 1 and 5 cm at the bottom portion 2.

The installation and operation of this drain block H will be explained (see Fig. 4).

The ground on which the drainage ditch is to be installed is dug and concrete 10 is poured, and the main drainage ditch blocks H are successively arranged and installed on top of this while keeping the level. This drain block H has both side wall portions 1, 1 integrally, and is manufactured in a factory to ensure constant quality, so this work can be done accurately and easily. Further, when using the drain block H having the engaging portions 7 and 8 on the end faces, there is no difference in level between adjacent drain groove blocks H, and the connection work can be easily performed. The joints between blocks H are filled with mortar. In this state, the concrete floor 12 is poured.

By solidifying the earthen floor concrete 12, it closely engages with the triangular ridges 5 of the main drain block H. That is, the lower side part, that is, the jaw part 5b of the triangular convex strip 5 digs into the dirt floor concrete 12, and the upper side part 5a is buried in the dirt floor concrete 12 and is prevented from floating up. Therefore, even when heavy vehicles pass, the main drainage ditch block H and the earthen floor concrete 12
The engagement with the drain block H does not break, and neither the lifting of the drain block H nor the cracking of the concrete floor 12 occurs.

FIG. 5 shows another embodiment of the precast drain block of the present invention.

This precast drain gutter block I is used at a corner (or a bent part), and the groove part 4 is bent into an L-shape. The same reference numerals are given to the same members as in the previous embodiment.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the precast small drain block of the present invention, FIG. 1 is a cross-sectional view of one embodiment, FIG. 2 is a three-dimensional view thereof, and FIG. 3 is an end surface and other views. FIG. 4 is a diagram showing the installed state of this block, and FIG. 5 is a three-dimensional diagram of another embodiment. FIG. 6 is a sectional view showing the structure of a conventional small drainage ditch. H, I...Small drain block, 1...Side wall part,
2...Base part, 4...Notch groove, 5...Triangular protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a concrete drain block consisting of opposing side walls 1, 1 and a bottom 2, with a cut groove 4 formed in the longitudinal direction of the center and a U-shaped cross section, the upper edge triangular protrusions 5 in the longitudinal direction on both outer sides of
A precast concrete drain block characterized by forming: