Earth Retention Systems

1makuluwa Earth retention systems are walls that are erected to uphold soil and prevent it from descending and causing an undue disaster. The commonly used types of retention systems are gabion walls, reinforced concrete walls and random rubble masonry walls; these are used island wide. Soil Tech introduces three newer and much more convenient methods of retention which are the Expanded Polystyrene (EPS) system, the ACROSOLS system and the ERDOX system.

EPS is a closed cell, firm and lightweight plastic foam and for a period of about 50 years, EPS has been used in construction of embankments of all kinds. Soil Tech has used EPS in three projects that it has undertaken. EPS is used in form of large blocks, to fill the void in between a stabilized slope and a cover to protect it. It can be used in conjunction with any conventional wall or with a more modern technique of slope protection. For example, for a road embankment, the slope may be stabilized and then EPS may be filled and finally it may be covered with a layer of shotcrete.

ACROSOLS and ERDOX are frame systems, from France and Austria respectively. Instead of a wall to hold back loose soil, ACROSOLS and ERDOX frames are installed into the soil, and stay in place with the use of nails that are anchored deep into the soil or rock.

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Advantages of EPS, ACROSOLS and ERDOX over Conventional Earth Retaining Structures :

  • No requirement for excavations
  • Considerably lesser consumption of material usage, i.e. soil, sand, metal, cement.
  • Lesser workforce and machinery is required.
  • Can be used in limited work space areas, for example, in limited Right Of Way areas.
  • Convenient – lightweight, easy to handle, quick installation and construction.
  • Neither construction nor function is affected by adverse weather conditions.
  • Economic cost reduces in terms of traffic and environment damage.
  • Environmental friendly.
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