GB2509967A - Drainage system for impermeable surface - Google Patents
Drainage system for impermeable surface Download PDFInfo
- Publication number
- GB2509967A GB2509967A GB1301012.9A GB201301012A GB2509967A GB 2509967 A GB2509967 A GB 2509967A GB 201301012 A GB201301012 A GB 201301012A GB 2509967 A GB2509967 A GB 2509967A
- Authority
- GB
- United Kingdom
- Prior art keywords
- caps
- grid
- impermeable
- cored
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000565 sealant Substances 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 description 9
- 239000004575 stone Substances 0.000 description 8
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000003339 best practice Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The drainage system, for use with car parks and other similar impermeable surfaces, comprises a grid of vertical cored holes provided in the impermeable surface 2, which are provided with caps 1 and which allow water to flow directly to a porous sub-base 6. The caps are preferably installed so as to be flush with the surface. A sealant 3 may be provided around the bevelled edge of the cap to form a seal with the cored edge of the hole. The cored hole may be provided lined with a small diameter pipe 4 and provided with gravel 5 at the base of the hole.
Description
Asphalt sustainable urban drainage system (SUDS) This invention relates to a system for draining rainfall from impermeable surfaces (such as car parks) in a sustainable way, which attenuates the water and reduces the risk of flooding.
In urban environments, where a large proportion of the ground surface is covered with impermeable material such as asphalt and concrete, rainfall cannot infiltrate into the ground. Instead, it fills up any depressions in the surface (ponding'), before rapidly moving over the surface to conventional drainage systems. The rapid movement of the water to the drainage can lead to very large quantities of water entering traditional systems in a short period of time, which frequently back-up' and cause flooding of the area. As climate change is increasing both the frequency and intensity of rainfall events in the UK, many antiquated drainage systems in our cities are unable to cope with the volumes of water involved.
Government policy on developments and flood risk is laid out in Planning Policy Statement PP525 (Communities and Local Government, 2006). PPS2S states that SUDS improve the management of surface water, and requires that SUDS be promoted by planning authorities to attenuate rainfall and help improve water quality. The document states that SUDS solutions are suitable for any type of site. Best practice guidance for the design, construction, operation and maintenance of such systems is set out in the SUDS Manual' (CIRIA, 2007).
Commonly used SUDS include swales, attenuation basins, attenuation tanks and permeable pavements (using permeable asphalt, or concrete block paving with grit in the joints to allow water through).
Permeable asphalt and concrete block permeable paving is often prohibitively expensive. Permeable asphalt also has a reduced service life compared with conventional asphalt, and concrete block permeable paving may require regular maintenance.
This invention uses a grid of vertical cored holes with caps in conventional impermeable asphalt surfacing. This allows rainfall to flow directly from the impermeable surface to a porous sub-base, where the water is stored prior to leaving the site, either by infiltration to the ground below or controlled discharge to storm drainage. The cap allows the maximum volume of water to enter the sub-base, with maintenance minimised and no risk of tripping or heel entry.
The caps are installed flush with the surface level, and come in a range of colours to blend with the surrounding surfacing. Contrasting caps may be installed to delineate areas, such as car parking bays.
Preferably, a sealant is applied around the bevelled edge of the cap to form a seal with the cored edge of the hole. This protects the edge from any subsequent erosion. Gravel is included in the base of the cored hole to prevent the local wash-out of the sub-base. The cored hole would preferably be lined with a vertical small diameter pipe.
The system may be used in newly constructed hardstanding areas. It may also be used in existing areas of impermeable surfacing where flooding is an issue. Any area of asphalt or concrete will have a granular stone sub-base, installed prior to the surfacing. The use of a grid of vertical cored holes with caps in such surfacing would allow potential flood water to travel down to the dry stone sub-base under gravity, which could contain up to 40% voids for the storage of water. The water may then infiltrate directly into the ground below.
Attenuation of water in a stone sub-base is effective at removing pollution from runoff and as a consequence oil separators are not generally required.
Following flooding of rivers, ponding of water is often observed on impermeable services even after the river has retreated (usually due to blocked drains). A grid of vertical cored holes with caps in the surfacing would give this water a route to dissipate through the impermeable surface.
An example of the invention will now be described by referring to the accompanying drawings: * Figure 1 shows a car park with ponding and surface run-off to drains.
* Figure 2 shows the car park after the installation of a grid of vertical cored holes with caps to remediate the ponding and allow the water to be attenuated in the stone sub-base.
* Figure 3 shows the invention used to form a new car park sustainable urban drainage system.
A traditional hard surfacing (1) is shown in Figure 1, with surface run-off of rainfall (2) moving rapidly to drains (3), with no attenuation. Ponding of surface water occurs in depressions in the impermeable surface (4). The stone sub-base of the hardstanding (5) is inaccessible to the surface water, and the potential storage in the stone voids is unutilised. The water also has no opportunity to infiltration into the natural ground below.
Figure 2 shows the same area of impermeable hardstanding (1) after the installation of a grid of vertical cored holes with caps (4). While surface run-off (2) may still enter the existing drains (3), the areas of ponding are dissipated to the stone sub-base (5). The discharge to the existing drainage (3) is also significantly reduced as water may percolate through the cored holes with caps into the voids of the stone sub-base. Infiltration to the natural ground below is also utilised.
A new design for an area of hardstanding is shown in Figure 3, using a grid of vertical cored holes with caps (1) in conventional impermeable asphalt surfacing (2). Preferably, a sealant (3) is applied around the bevelled edge of the cap to form a seal with the cored edge of the hole. The cored hole would preferably be lined with a vertical small diameter pipe (4). This protects the edge and cored hole from any subsequent erosion. Gravel (5) is included in the base of the cored hole to prevent the local wash-out of the sub-base. This arrangement allows rainfall to pass from the impermeable surface to the porous coarse graded aggregate sub-base (6) (with a minimum of 32% voids), where the water is stored prior to leaving the site, either by infiltration to the ground below through a permeable geotextile liner (7) or by controlled discharge to storm drainage.
Claims (8)
- Claims 1. A grid of vertical cored holes with caps in impermeable surfacing, allowing water to flow directly under gravity from the surface to a porous sub-base.
- 2. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which the cap allows water to pass through, with no risk of tripping or heel entry.
- 3. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which the caps are installed flush with the surface level.
- 4. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which the caps are such a colour as to blend in with the surrounding surfacing.
- 5. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which the colour of the caps contrasts with the surfacing to delineate areas, such as car parking bays.
- 6. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which a sealant is applied around the bevelled edge of the cap to form a seal with the cored edge of the hole.
- 7. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which the cored hole is lined with a small diameter pipe.
- 8. A grid of vertical cored holes with caps in impermeable surfacing according to claim 1, in which gravel is included in the base of the cored hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1301012.9A GB2509967A (en) | 2013-01-21 | 2013-01-21 | Drainage system for impermeable surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1301012.9A GB2509967A (en) | 2013-01-21 | 2013-01-21 | Drainage system for impermeable surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201301012D0 GB201301012D0 (en) | 2013-03-06 |
| GB2509967A true GB2509967A (en) | 2014-07-23 |
Family
ID=47843626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1301012.9A Withdrawn GB2509967A (en) | 2013-01-21 | 2013-01-21 | Drainage system for impermeable surface |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2509967A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106012752A (en) * | 2016-06-14 | 2016-10-12 | 江西师范大学 | Construction method of environment-friendly road |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4382716A (en) * | 1981-03-02 | 1983-05-10 | Troy Miller | Blowout recovery system |
| US20050047866A1 (en) * | 2003-09-02 | 2005-03-03 | Chen Jui Wen | Construction of environmental and water-permeable paving |
| KR100704972B1 (en) * | 2006-12-14 | 2007-04-09 | (주)한성개발공사 | Driveway with road block with absorbing holes |
| GB2461808A (en) * | 2008-07-16 | 2010-01-20 | George Lyall Walker | Method of adapting a pavement |
| GB2483550A (en) * | 2010-09-09 | 2012-03-14 | Jui-Wen Chen | Method for manufacturing artificial paving |
| CN101922137B (en) * | 2010-08-17 | 2012-08-22 | 赖意珍 | Asphalt road surface drainage pile |
-
2013
- 2013-01-21 GB GB1301012.9A patent/GB2509967A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4382716A (en) * | 1981-03-02 | 1983-05-10 | Troy Miller | Blowout recovery system |
| US20050047866A1 (en) * | 2003-09-02 | 2005-03-03 | Chen Jui Wen | Construction of environmental and water-permeable paving |
| KR100704972B1 (en) * | 2006-12-14 | 2007-04-09 | (주)한성개발공사 | Driveway with road block with absorbing holes |
| GB2461808A (en) * | 2008-07-16 | 2010-01-20 | George Lyall Walker | Method of adapting a pavement |
| CN101922137B (en) * | 2010-08-17 | 2012-08-22 | 赖意珍 | Asphalt road surface drainage pile |
| GB2483550A (en) * | 2010-09-09 | 2012-03-14 | Jui-Wen Chen | Method for manufacturing artificial paving |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106012752A (en) * | 2016-06-14 | 2016-10-12 | 江西师范大学 | Construction method of environment-friendly road |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201301012D0 (en) | 2013-03-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |