JP3154050U - Drainage blocker combined with overflow and infiltration - Google Patents

Abstract

A drainage block that continuously drains rainwater that has penetrated road surface rainwater and pavement into sewers, etc., and diverts it to underground storage when the drainage volume exceeds a certain level, thereby enabling control of outflow. I will provide a. The drain block 1 is semi-embedded up to the upper side of the vertical groove using the cradle 3 on the permeation trench 20, and the lower end of the outer surface is opened on the upper side of the low water flow portion 22 on the curb side. It has an overflow port 5 that communicates directly with the apron 8B. [Selection] Figure 1

Description

  The present invention relates to a drainage block construction that also serves as a storage permeation for suppressing outflow of rainwater.

Conventionally, in rainwater drainage facilities such as ordinary roads, urban sewers, etc. except for rainwater storage and penetration facilities that use permeable or perforated concrete gutters, pedestrian boundary L-type, U-shaped gutters, pipe gutter gutters, etc. with precast concrete The drainage block is used to continuously collect surface water and permeation through the pavement from the side along the road and discharge it to the end of the flow. Sometimes the burden on sewers and rivers increases.
In addition, the design of discharge facilities based only on the flow capacity contributes to a decrease in the amount of groundwater, etc., and drainage capacity at a normal water level under conditions suitable for the introduction of topography / geological infiltration facilities with high infiltration capacity and low groundwater level. However, it is also required to serve as an outflow suppression by overflow overflow infiltration at high water levels.

  JP-A-11-50517   JP 2000-345508 A

  In drainage facilities that discharge road surface rainwater and pavement permeation to sewers, etc., it is possible to maintain constant discharge from the cross section of water flow and maintain the normal discharge from the cross section of water flow under conditions suitable for infiltration facilities with high penetration capability and low groundwater level. If a certain level is exceeded, the excess will be diverted to overflow overflow infiltration, and a drainage blocker that will be able to control the amount of rainwater outflow is obtained.

Use a precast concrete drainage block with a structure that has an overflow opening at the level of the flat water level on the inner side along the flow of the water flow part, and has a structure in which the lower end of the outer side is open and directly connected to the falling apron on the upper side of the groove. Single-grain crushed stone, for example, osmotic trenches with a structure that prevents the inflow of earth and sand with a permeable sheet by replacing with crushed stone having a particle size range of 20 to 40 mm and a porosity of 30 to 40%, or an osmotic pipe in which a permeable pipe or the like is embedded A drainage block is placed on the trench and semi-buried continuously up to the top of the groove, and when the water level rises while maintaining constant drainage from the water flow section to the sewer, etc. The upper drainage block semi-buried part is received and penetrated.
In this case, the outflow water to the open groove at the lower end of the drain block outer side surface spreads and sinks into the upper part of the permeation trench due to the part of the fall from the overflow apron drop apron and the part reaching the open outer side surface.

  While draining as planned, only the high water level can be used for overflow storage and infiltration, maintaining road functions, etc., and at the same time reducing the burden on sewers and rivers by controlling runoff.

  The drainage capacity is the same as in the past in hydraulic calculations, and economic design by reducing the cross section of water flow is possible by taking into account the overflow and infiltration.

  A water flow is generated in the low water part every rain, and the water flow surface can be maintained in the same way as the conventional method.

The location of the overflow port is higher than the low water flow section, and it is difficult for sediment to flow in.
Furthermore, vacuum can be used, and it is suitable for maintenance management such as cleaning of side grooves.

  All overflow water falls into the upper part of the infiltration trench along the outside of the drainage block and sinks and sinks into the gap of the replacement material. Therefore, the width of the entire infiltration trench is formed by adding the side replacement material to the drainage block width, and has a high storage capacity in a large section. Can be obtained.

  As with conventional products, drainage blocks are suitable for factory production and can be easily and inexpensively supplied with overflow ports, vertical grooves and falling apron sections.

  It is a notch slope figure which shows the Example of the pedestrian boundary L type drainage block for drainage pavement installed in the upper part of the osmosis | permeation trench.   It is a notch slope figure which shows the Example of the drop lid side groove | channel drainage block installed in the upper part of the osmosis | permeation trench.   It is a notch slope figure which shows the Example of the pipe gutter side drainage block installed in the upper part of the osmosis | permeation trench.   It is sectional drawing along the AA line of FIG.   It is sectional drawing along the BB line of FIG.   It is sectional drawing along the AA line of FIG.   It is sectional drawing along the AA line of FIG.   It is a slope view which shows the Example of the drainage block of FIG.   It is a slope view which shows the Example of the drainage block of FIG.   It is a slope view which shows the Example of the drainage block of FIG.

  The drainage block has an overflow port on the inner surface of the water passage, and has a structure in which the lower part of the outer surface is open and directly connected to the falling apron on the upper side of the groove. As for the overflow port, the falling apron, and the vertical groove, the size and the like are provided so as not to reduce the strength of the main body, but they are formed by concave cutting on the drainage block's face, or by plastic bonding, etc. It is also possible to embed a processed product.

Since the infiltration trench is formed by replacing the original roadbed with single-grain crushed stone having a high porosity, the drainage block is mainly supported by a cradle and the replacement material is less likely to be compacted.
Further, the infiltration trench is not limited to the crushed stone method, and various construction methods that increase the storage capacity by enlarging the voids in combination with a plastic material void, a concrete porous material, a perforated product, and the like are also possible.

  It is common to use a long product for the P-type road boundary L-type block, and to install a cradle every span of 2m in accordance with the block length. Suitable for part construction.

Fig. 1 Fig. 2 Fig. 3 shows a construction state of the embodiment.
FIG. 1 shows an embodiment of a drainage work that uses an L-shaped drainage block at the boundary of a pedestrian road and is semi-embedded and installed on the upper part of a previously formed infiltration trench. FIG. It is the Example of the drainage which semi-buried the drainage block of the gutter side groove in the upper part of the osmosis | permeation trench.

In the embodiment of FIG.
The L-shaped drainage block (1) for the pedestrian road boundary is semi-embedded up to the upper side of the vertical groove (8A) on the permeation trench (20) formed in advance using the cradle (3).
The infiltration trench (20) is provided with sand (11) in the excavated groove and filled with a single-grain crushed stone having a high porosity as a replacement material (10). In this case, the water-permeable sheet (12) is interposed between the side surface and the upper surface of the crushed stone.
In addition, although a porous permeation pipe | tube etc. may be embed | buried in crushed stone, this Example is a case only of crushed stone.
As shown in FIG. 8, the cradle (3) has the width, thickness, and length necessary for placing the drainage block (1) and transmitting the design load to the roadbed.
The drainage block (1) has an outer bottom recess (4) by flanges (6) and (6) on both sides along the water flow direction on the bottom, and is installed on the infiltration trench (20) via a filter (13) and semi-embedded. However, in order to maintain the porosity of the replacement material (10), the cradle (3) is used to form the hollow reservoir (9) shown in FIG. 4 and FIG.
As shown in FIG. 4 and FIG. 8, the upper surface water passing portion of the drainage block (1) is directly connected to the falling apron (8B) portion of the vertical groove (8A) with the lower end of the outer surface open on the upper side of the low water passing portion (22). Overflow ports (5) are provided at equal intervals. In this embodiment, the filter (13) is previously attached to the outer bottom surface of the drainage block (1).
Further, in this embodiment, as shown in FIG. 5 and FIG. 8, slits (7) are provided at equal intervals in the drainage block (1), and permeable rainwater from the drainage pavement (14) on the impervious pavement (15) is received. It discharges to the hollow reservoir (9).

In the embodiment of FIG.
The drainage block (1) of the drop lid side groove is semi-embedded up to the upper side of the vertical groove (8A) on the permeation trench (20) formed in advance using the cradle (3).
The cradle (3) has the width, thickness and length necessary for placing the drainage block (1) and transmitting the design load to the roadbed, and is used so that the infiltration trench (20) is less likely to be consolidated. Yes.
The drainage block (1) is a combination of the cover plate (2), and the drainage block (1) has a water flow portion at the upper side of the low water flow portion (22) as shown in FIG. Overflow ports (5) that directly communicate with the falling apron (8B) portion of the open groove (8A) are provided at equal intervals.

In the embodiment of FIG.
The drainage block (1) of the pipe side groove is semi-embedded to the upper side of the vertical groove (8A) on the permeation trench (20) formed in advance using the cradle (3). It has an inflow port (21).
The cradle (3) has a width, thickness and length necessary for placing the drainage block (1) and transmitting the design load to the roadbed, and is used so that the infiltration trench (20) is less likely to be consolidated. .
As shown in FIG. 7 and FIG. 10, the drainage block (1) has a drainage block (8B) that is directly connected to the falling apron (8B) of the groove (8A) with the lower end of the outer surface open on the upper side of the low-fluidity section (22). The flow ports (5) are provided at equal intervals, and in this embodiment, the filter (13) is fixed to the open outer surface of the vertical groove (8A).

  Maintaining the required drainage capacity by making slight improvements to conventional methods in rainwater drainage facilities such as roads, and at the same time, reducing the burden on sewers and rivers and contributing to groundwater recharge, making it highly economical Design becomes possible.

  The drainage block is not limited to the overflow storage and penetration method shown in the embodiment, but can be used for various purposes such as direct installation on a foundation without penetration trench and installation on base concrete by closing the overflow opening.

The material of the water permeable sheet and the filter is polyester, polypropylene, etc. according to the technical guidelines in general rainwater storage and infiltration facilities, the tensile strength is 30 kgf / 5 cm or more, the water permeability is 10 ⁻¹ to 10 ⁻² cm / sec or more, and the thickness. The standard is 0.1 to 0.2 mm or more.

DESCRIPTION OF SYMBOLS 1 Drain block 2 Lid 3 Receiver 4 Outer bottom recessed part 5 Overflow port 6 Flange 7 Slit 8A Vertical groove 8B Falling apron 9 Hollow storage part 10 Replacement material 11 Laying sand 12 Permeable sheet 13 Filter 14 Drainage equipment 15 Not Permeable pavement 20 Permeation trench 21 Inlet 22 Low water passage

Claims (2)

  Rainwater drainage that serves as both overflow storage penetration and drainage for the high water level above the overflow port (5) that is semi-buried to the top of the vertical groove using the cradle (3) on the previously formed penetration trench (20) Pedestrian boundary that constitutes a road and has an overflow port (5) that directly connects with the falling apron (8B) portion of the vertical groove (8A) with the lower end of the outer surface open at the upper edge of the low water flow portion (22) curb side L-shaped drainage block (1).   The storm water drainage channel according to claim 1, wherein the overflow port is directly connected to the falling apron (8B) portion of the vertical groove (8A) with the lower end of the outer surface open on at least one upper side of the low water flow portion (22). (1) A drainage block (1) comprising a lid-end side groove and a pipe trough side groove provided with (5).

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