JPH0676479U - Drainage concrete pipe - Google Patents

Abstract

(57) [Summary] [Purpose] The flow velocity of water flowing through a concrete pipe for drainage is increased to prevent water from being accumulated due to the accumulation of sand and dust, and also to facilitate work during construction. Improve efficiency. [Constitution] Drainage concrete pipe A is drainage block body 1
And a lid block body 2. The drain groove block body 1 is provided with a water passage groove 13 having a triangular cross section and a narrower lower side. Fitting grooves 16 and 17 are provided on the upper surfaces 14 and 15 of the wall portion of the drainage groove block body 1. The back side of the side surface 132 is the space portion 1 except for the reinforcing wall 18.
9 is formed. The upper surface 20 of the lid block body 2 is formed to be inclined toward the water guiding holes 22 and 22a. At the end of the lid block body 2, a riding portion 21 higher than the upper surface 20 is formed. Water guiding grooves 24, 24a are provided from the water guiding holes 22, 22a to the ends of the upper surface 20. On the lower surface 23 of the lid block body 2, fitting protrusions 25 and 26 corresponding to the fitting grooves 16 and 17 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drainage concrete pipe to be buried near a road.

[0002]

[Prior art]

 In general, a drainage concrete pipe having a water guide hole on the upper surface is buried near the road to improve water drainage on the road. The cross-sectional shape of the drainage concrete pipe on the bottom side of the water passage is usually U-shaped. Moreover, the concrete pipe for drainage is integrally molded by a formwork device using a core.

[0003]

[Problems to be solved by the device]

 However, the conventional drainage concrete pipe as described above has the following problems. (A) Since the width on the upper side and the width on the bottom side of the water passage are almost the same, the flow velocity of water is almost the same at the top and bottom of the water passage when rainwater flows. In other words, the flow velocity (flowing water pressure) is uniform throughout the water passage, and the flow velocity at the bottom does not become too high. As a result, sand, leaves, and other debris may easily accumulate at the bottom of the water passage, causing water to stop flowing. (B) The drainage concrete pipe is integrally molded. Therefore, it generally has a considerable weight, and in the adjustment work at the time of embedding without using a working machine for hanging, the physical burden on the worker becomes large and the work efficiency becomes poor.

[0004]

[Means for Solving the Problems]

 Means of the present invention taken to solve the above problems are as follows. In the first invention, a drain groove block body having an upper portion opened over its entire length to form a water passage and a water guiding hole are provided, and the drain groove block body is capped on the upper portion of the drain groove block body without shifting its position. This is a concrete pipe for drainage, which is equipped with a lid block body that is made possible.

According to a second aspect of the invention, a drain groove block body having an upper portion opened over the entire length to form a water passage and a water guiding hole, and the position of the drain groove block body is displaced above the drain groove block body. A drainage concrete pipe comprising: a lid block body that can be crowned without a crown;

[0006]

[Action]

 The drainage block body and the lid block body are formed separately from each other, and they are combined into a tubular shape when used for construction. The drainage block block and lid block block can be handled separately during handling, transportation, and transportation during construction. In the case where the bottom side of the water passage of the drainage gutter block is narrow, the cross-sectional area of the bottom side of the water passage is small, so the running water pressure on the bottom side is smaller than that on the top side. Larger and faster water flow.

[0007]

【Example】

 The present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is an exploded perspective view of a concrete pipe for drainage according to the present invention, and FIG. 2 is a sectional view showing a state in which a drainage block block body and a lid block body are combined. Reference numeral A is a concrete pipe for drainage, which is formed by combining the drainage block body 1 and the lid block body 2. The drainage groove block body 1 is formed to have a required length, and the outer bottom surface 10 and the three outer side surfaces 11 and 12 form a flat surface with the corners forming a right angle. The upper part of the drainage channel block body 1 is open, and a water channel 13 is formed over the entire length. Among the water flow channels 13, the side surface 131 on the arrow a side (road side) is formed vertically except for the upper part inclined inward.

Further, the side surface 132 on the arrow b side (road shoulder side) is a slope of about 45 degrees that is inclined downward to the arrow a side. The side surfaces 131 and 132 are connected at the bottom, and the corners are curved. With this structure, the width of the water passage groove 13 becomes narrower toward the bottom. Fitting grooves 16 and 17 are provided over the entire lengths of the upper surfaces 14 and 15 of the wall portion that sandwich the water passage 13 of the drain groove block body 1, respectively. In addition, on the back side of the side surface 132, in order to reduce the weight, a space portion 19 is formed by omitting the reinforcing walls 18 at both ends in the length direction and the intermediate portion. (See Figure 2)

The lid block body 2 is formed to have the same length as the drain groove block body 1. The upper surface 20 of the lid block body 2 on the arrow a side is formed so as to be inclined slightly downward to the arrow b side. In addition, a riding portion 21 higher than the upper surface 20 is formed over the entire length at the end portion of the lid block body 2 on the arrow b side.

In addition, water guide holes 22 and 22a are formed at six locations at the same interval at the end of the upper surface 20 on the riding section 21 side. The water guide holes 22 and 22a penetrate to the lower surface 23, and the lower side is narrow. The water guiding holes 22a at both ends in the length direction of the lid block body 2 are formed by vertically dividing the water guiding hole 22 in the middle portion into half, and when connecting to another lid block body 2, the water guiding holes are formed. It has the same shape as 22.

Water guiding grooves 24, 24 a are provided from the water guiding holes 22, 22 a to the end of the upper surface 20 on the arrow a side. The width of the water guiding groove 24a at both ends in the length direction of the lid block body 2 is about half the width of the water guiding groove 24. Fitting ridges 25 and 26 corresponding to the fitting grooves 16 and 17 are provided near the both ends of the lower surface 23 of the lid block body 2.

The method of use and the operation of this embodiment will be described with reference to FIGS. 1 and 2. When using the concrete pipe A for drainage, the drainage groove block body 1 and the lid block body 2 are assembled by fitting the fitting grooves 16 and 17 and the fitting ridges 25 and 26, and the contact surfaces are bonded with an epoxy adhesive. Adhesive with an agent, etc. to integrate. This combination work may be performed in advance at the material storage site before construction or at the site during construction.

When combining at the site, first insert the drainage block body 1 into a groove dug along the road to adjust the depth and direction, and then cover the drainage block body 1 with the lid block body 2. , Unite. In this way, since the drainage channel block body 1 and the lid block body 2 can be transported and handled separately, the physical burden on the operator is reduced and the construction work can be performed compared to the case where both are integrated. It is easier to remove and work efficiency is improved.

When rainwater or the like enters the constructed concrete pipe A for drainage, the bottom side of the water flow channel 13 having a narrow width and a small cross-sectional area has a larger running water pressure than the top side, and thus Will flow faster. As a result, sand, tree leaves, dust, etc. that enter the water passage 13 together with the rainwater are swiftly flown, so that it is difficult for the sand, the leaves, and the like to accumulate in the water passage 13 and the water is unlikely to stay.

FIG. 3 is a sectional view showing another embodiment of the drainage concrete pipe. In this embodiment, the drainage groove block body 1 has substantially the same structure as a normal U-shaped block. As described above, since the concrete pipe A for drainage has a structure in which the drainage block body 1 and the lid block body 2 are combined and integrated, the lid block body 2 may be replaced with one having a different structure as necessary. It is possible and advantageous in construction management. In the drawings, the same or equivalent parts as those of the above-mentioned embodiment are designated by the same reference numerals. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims for utility model registration.

[0016]

[Effect of device]

 The present invention has the above configuration and has the following effects. (A) If concrete pipes for drainage are combined at the site, the drainage block block body and lid block body can be transported and handled separately, so it takes more workers than when both are integrated. The physical burden is reduced, construction becomes easier, and work efficiency improves. (B) When rainwater enters the constructed concrete pipe for drainage, the water pressure at the bottom side of the water flow channel, which has a narrow width and a small cross-sectional area, becomes larger than that at the upper side, and the flow velocity of the water increases. Will be faster. As a result, the sand, leaves, and debris that enter the inside of the water ditch along with the rainwater are swiftly flown, so it is difficult for them to accumulate inside the water ditch, and water retention is also unlikely to occur. (C) Since the concrete pipe for drainage has a structure in which the drainage block body and the lid block body are combined and integrated, it is possible to replace the lid block body with a different structure as necessary, and construction management Is also advantageous.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a concrete pipe for drainage according to the present invention.

FIG. 2 is a cross-sectional view of a state in which a drain groove block body and a lid block body are combined.

FIG. 3 is a cross-sectional view showing another embodiment of the drainage concrete pipe.

[Explanation of symbols]

 A Concrete pipe for drainage 1 Drain groove block body 13 Water passage groove 16, 17 Fitting groove 2 Lid block body 22, 22a Water guide hole 25, 26 Fitting protrusion

Claims (2)

[Scope of utility model registration request] 1. A drainage block body having an upper portion opened over its entire length to form a water passageway and a water guiding hole so that the drainage block body can be crowned without being displaced in position. A concrete pipe for drainage, which includes a lid block body. 2. A drainage block body having an upper part opened over its entire length to form a water passageway, and a water guiding hole so that the upper part of the drainage block body can be crowned without being displaced. A drainage concrete pipe, comprising: a lid block body, wherein the water passage groove is formed to have a narrow bottom portion side.