Retaining Wall Drainage, Deckdrain, Eastern Peripheral Expressway, Delhi, India
|Client:||National Highway Authority of India|
|Contractor:||Ashoka Buildcon Limited|
|Consultant:||URS Scott Wilson Pvt Ltd / AECOM- CEG JV|
|Product:||Deckdrain Drainage Geocomposite|
|Benefits:||- Easy to install|
- Cost effective Vs traditional drainage media
- Improved program time
The 135km long upgraded Eastern Peripheral Expressway completes the ring road around Delhi passing through 3 districts and will especially relieve traffic congestion in the Faridabad- Ghaziabad area. The project includes road widening to six lanes, flyovers, rail over-bridges, pedestrian and vehicular underpasses.
Providing a suitable drainage system for the many structures on the road subject to monsoon rain, especially earth retaining structures, is of paramount importance. Water must be drained away rapidly from the back of the retaining structures to avoid additional water pressure and earth pressures due to a reduction in shear strength of the soil.
Traditionally, a 600mm gravel layer or porous concrete blocks are placed behind the earth retaining structures.
The disadvantages are:
- It is difficult to select and supply the correct filter grading to match fill material without clogging
- Placing of stone or blocks is time consuming and damages the back of wall waterproofing layer
- The cramped areas behind an abutment leaves little room for manoeuvre with delivery or placement of both blocks or stone.
ASHOKA Buildcon obtained approval from URS Scott Wilson to install a ABG Deckdrain drainage geocomposite to avoid all of the difficulties and risks in using a drainage filter stone or blocks. ABG Deckdrain met the specified flow requirements at all working temperatures, protected the structure from damage and provided a secondary waterproofing layer to the wall. Easy to install in tight working conditions, the ABG Deckdrain geocomposite is simply cut, jointed, wrapped around corners and over the base drainage pipe.
ABG Deckdrain geocomposite for vertical wall drainage
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ABG manufacturers the only BBA approved wall drainage geocomposite for use by Highways Authorities.
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