IL255805A

IL255805A - A metal curb and an urban road catch basin

Info

Publication number: IL255805A
Application number: IL255805A
Authority: IL
Original assignee: Tamam Yosef And Sons Tech Ltd
Priority date: 2015-07-06
Filing date: 2017-11-21
Publication date: 2018-01-31
Also published as: IL255805B; WO2017006311A1

Description

WO 2017/006311 PCT/IL2016/050699 STRUCTURE OF STORM WATER CATCH BASIN AND CURB HVLET CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of U.S. Provisional Patent Application 62/ 188,748 ﬁled on O6-July-201 5,which is incorporated herein by reference.

TECHNICAL FIELD

[0002] The invention relates to drainage of roads and more specifically, it relates to the structure of curb gutter and sidewalk for storm drainage.

BACKGROUND ART

[0003] Road flooding is common during wintertime in Israel. This is usually caused by leaves and trash that block the drainage openings in the road and in the curb. It is important to note that the water drainage system needs constant maintenance. During the summer trash tends to drop down the drains and either fill the drain basin or block the openings. During winter, and autumn, leaves fall and block the openings and must be cleaned once in a while, even during storms, to keep the water flow at a high enough level in order to decrease the probability of a flooded roadway.

[0004] The drainage system in Israel is built with the basin located underneath the road.

The basin is covered with a grate and there is a second drain curb inlet. The basin, as such, is built like a box that is located underneath the road, but has a little adage that is located underneath the edge of the curb; this allows water to fall into the basin from the curb inlet.

[0005] This drainage system is lacking and cannot handle Israeli winters, which usually floods a few times every year, whenever there is a large amount of rainfall. The system cannot handle the flow of water because of two conditions; one that is known is blockage WO 2017/006311 PCT/IL2016/050699 by trash and leaves. The other, previously unknown, was the construction of the current catch basins. The fact that there is not enough space for the water to flow freely from the curb inlet causes vortices that slow the drainage efficiency.

[0006] Patent publication No. 2014/0097133 A1 "Retractable Screen Systems and Methods for Catch Basins” introduces a system that closes the curb inlet with a spring-loaded assembly. This prevents leaves and garbage from entering the catch basin. The gate opened by the pressure of the water flowing the drain opening. This way garbage does not stick to the particular curb inlet, because it is normally closed, just like the rest of the curb.

This does not solve the problem of flooding, it might just reduce the amount of maintenance required for the system, but while the rain falls, this system still will not be able to cope with the flood.

[0007] US Pat. No. 6,972,088 B2 ”Pivota| Gate for Catch Basin of a Storm Drain System” discloses a gate that closes the curb inlet that is opened by water. Note that addition of a gate in the curb inlet causes reduction of the area of the curb inlet cross-section, thus clogging of the water flow path by debris is more severe.

SUMMARY OF INVENTION Technical Problem

[008] Curbed drain catch basins are entry points for urban water runoff. Trash and debris, such as bottles, cans, plastic wrappers, leaves can block the water flow resulting street ﬂooding. The object the disclosed invention is to prevent street ﬂooding. Typically the height of a pavement is 6” (15 cm). The curb stone is made out of concrete, and as a result the height of the curb inlet is 3” (7.5 cm). In many cases the depth of the curb inlet is 3”.

This happens when the collecting pipes are under the road, and the basin is built under the road and the curb stone.

WO 2017/006311 PCT/IL2016/050699 Solution To Problem

[009] A new structure of curb stone, made of steel plate is presented. Because of the small thickness of the steel plate, 15” (instead of 3”) the height of the curb inlet is increased by 50%, to be 4.5”, which enables bottles and leaves to pass through. In addition, the use of metal ensures bigger depth of the curb inlet. The inner part of the curb stone is rounded, to prevent vortices, thus enabling free flow of the drainage water and debris. The prevent the debris from reaching the sewer system, the exit of the connecting pipe is higher than the bottom of the catch basin. Thus the debris remains at the bottom of the catch basin, which is periodically cleaned. Access to the catch basin is thorough the grate, that can be lifted.

BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG 1 shows the structure of currently used one unit of road drainage.

[0011] FIG. 2 presents the structure of currently used multi-unit road drainage.

[0012] FIG. 3 shows cross-section of currently used unit of road drainage.

[0013] FIG. 4 shows cross-section of one embodiment of road drainage according to the disclosed invention.

[0014] FIG. 5 shows cross-section of another embodiment of road drainage according to the disclosed invention.

[0015] FIG. 6 shows cross-section of another embodiment of road drainage according to the disclosed invention.

[0016] FIG. 7 shows a top view of the road and sidewalk with road drainage according to the disclosed invention.

WO 2017/006311 PCT/IL2016/050699 DETAILED DESCRIPTION

[0017] Full description of the invention is given hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiment set forth herein; rather this embodiment is provided so that the disclosure will be thorough, and will fully convey the scope of the invention to those skilled in the art.

[0018] It is the object of the present invention to provide efficient storm road drainage that is not blocked by debris materials such as leaves, cans and bottles, and has high volumetric flow rate. It is also an object of the invention to prevent the debris from reaching the sewage system.

[0019] FIG. 1 shows the structure of currently used one unit of road drainage 100. The unit is comprised of a catch basin 110, which is built mostly under the road and the curbstone 120. The catch basin 110 is connected to the sewer system via a pipe 112. A grate 114, which is in the road level, covers the top of the basin, which is under the road, and a curbstone 120, which has curb inlet 122, covers the part of the basin, which lies under the curb.

[0020] Where high volumetric flow rate is required, multi-unit road drainage, as presented in FIG. 2 is constructed. This multi-unit system is comprised of a main catch basin unit 110, which is connected to the pipe 112, and it includes additional plurality of auxiliary catch basins 210 attached in series to the main catch basin unit. The auxiliary catch basin units 210 are covered by a grate 114 and curbstone 120, and water can flow from it to the main catch basin unit 110 via an opening 212. It should be noted that the basin is constructed only under the curbstone of the sidewalk.

[0021] FIG. 3 presents cross section A-A of the currently used road drainage shown in FIG 1.

This figure emphasizes the small water path through the curb inlet 122 and 320. Typically, 4 WO 2017/006311 PCT/IL2016/050699 the height of the curb inlet 122 and passage 320 is about eight centimeters . Such an opening is easily blocked by trash and leaves. In addition, water coming from the curb inlet meet the nearby vertical wall of the basin 322, which causes vortices that slow the drainage efficiency. The sidewalk material 310 is built at the same level of the curbstone.

[0022] A cross-section of one embodiment of the disclosed invention is presented in FIG 4.

The basin 410 is built under the road and under the sidewalk. The basin 410 is covered by the grate 114 on the road and by metal plate 420 on the area of the sidewalk. The metal plate 420 is shaped as a step where its high part faces the road and its lower part faces the sidewalk. Because of the small thickness of the metal plate 420 relative to the thickness of concrete curbstone 120 in FIG 3, the size of the curb inlet 424 is 50% bigger. In addition, the width of the passage 426 is significantly bigger so that it cannot be blocked by trash or leaves. In addition, the distance to the opposite vertical wall 322 is big enough to prevent vortices in the flow of the water. The top of the metal plate 420, which is at the level of the sidewalk, is covered by cast iron floor 428, and functions as part of the sidewalk. Note that the edge 422 of the metal plat 420 is rounded, to prevent damage to vehicles. The sidewalk material 310 is partially built on the metal plate 420. Note that the connecting pipe 112 in FIG 4 is positioned above the bottom of the catch basin 410. Therefore, the debris is accumulated in the space 430. This area has to be periodically cleaned. This space can be accessed by lifting the grate 114.

[0023] FIG 5 presents another embodiment of the disclosed invention in which the basin 510 is constructed under the whole width of the sidewalk. In addition, a slope 522 in the metal plate 520 deflects the incoming water from the curb inlet downward towards the catch basin, thus further reducing the resistance to the flow of water.

[0024] FIG 6 presents a similar structure to that represented in FIG 5, with the addition of support rod 610.

[0025] A top view of the structure of the drainage according to the disclosed invention is presented in FIG 7. The dotted lines 720 denote the location of the catch basin, which is under the road 710 and the sidewalk 310. The grate 114 is on the road and enables water WO 2017/006311 PCT/IL2016/050699 to flow into the catch basin. On the side walk 310 only the cast iron floor 428 is visible. The rest of the sidewalk has the same appearance regardless of the length of the basin beneath it.

Claims

255805/2 7 CLAIMS

1. An urban road catch basin assembly comprising: a. a catch basin formed under at least a portion of a sidewalk and under at least a portion of a road; b. a metal curb installed at the side of the sidewalk over the catch basin, said metal curb is step-like shaped and comprising a higher portion configured to extend toward the road to a first extent, a lower portion configured to extend toward and under the sidewalk to a second extent, and a middle portion interconnecting the higher portion and the lower portion, said higher portion, said middle portion and said lower portion being formed as a single, uniform member, and said second extent being greater than said first extent; and c. a grate mounted on the catch basin at the side of the road, wherein the catch basin comprises a first space extending under the higher portion and a second space extending under the lower portion, and wherein the second space has a volume greater than that of the first space.

2. An urban road catch basin assembly according to Claim 1, further comprising a connecting pipe configured for connecting the catch basin to a sewage system.

3. An urban road catch basin assembly according to Claim 2, wherein said connecting pipe is extending from a sidewall of the catch basin above a bottom of the catch basin.

4. An urban road catch basin assembly according to Claim 1, wherein the second space and the first space have a uniform, equi-leveled base surface.

5. An urban road catch basin assembly according to Claim 1 or 4, wherein a top wall surface of the second space extends lower than at least a portion of a top wall surface of the first space. 02513216\76-01 255805/2 8

6. An urban road catch basin assembly according to any one of Claims 1 to 5, a top wall surface of the first space near a road facing edge extends higher than a top wall surface of the second space.

7. An urban road catch basin assembly according to any one of Claims 1 to 6, wherein an area of the lower portion is greater than an area of the higher portion.

8. An urban road catch basin assembly according to any one of Claims 1 to 7, further comprising a top metal plate covering the higher portion.

9. An urban road catch basin assembly according to any one of Claims 1 to 8, wherein said higher portion has a rounded edge facing the road.

10. An urban road catch basin assembly according to any one of Claims 1 to 9, wherein said higher portion is formed as a plate.

11. An urban road catch basin assembly according to any one of Claims 1 to 10, wherein said lower portion is formed as a plate.

12. An urban road catch basin assembly according to any one of Claims 1 to 11, wherein an external wall portion of the middle portion, facing the lower portion, extends substantially normal to the lower portion and the higher portion.

13. An urban road catch basin assembly according to any one of Claims 1 to 12, wherein an inside wall portion of the middle portion extends at an obtuse angle between a bottom face of the higher portion and a bottom face of the lower portion.

14. An urban road catch basin assembly according to any one of Claims 1 to 13, wherein an inside wall portion of the middle portion is formed as a slope. 02513216\76-01 255805/2 9

15. An urban road catch basin assembly according to any one of Claims 1 to 14, wherein said higher portion is parallel to said lower portion.

16. An urban road catch basin assembly according to any one of Claims 1 to 15, wherein an upper face of the lower portion extends below a bottom face of the higher portion. 02513216\76-01