Specialized works:

  • nailed walls
  • anchored walls
  • berlinese walls
  • anchored sill
  • pile walls
  • ground injection
  • jet-grouting
  • gravity walls
  • reinforced concrete walls
  • riprap
  • gabion walls

Techniques used :

  • gravity grouting (IGU and IRS) of any types of nails, IGU and IRS
  • IGU and IRS-grouted ground anchors
  • IGU and IRS gravity-grouting of piles and micropiles
  • low and high-pressure injection, Jet-grouting
  • dry or wet-mix-projection of concrete veils
  • nets, screens and hung and pressed wire netting
  • sub-horizontal and vertical drains
  • riprap and gabions
  • any type of excavation

Ground stabilization techniques

Drilling station for nailed wall as a pile protection device at the Pont de Salars (12) – 3 Drills for simultaneous use with special arms – yield 300 ml/day.

Hairpin bend reinforcement for RN20 through Ariège (09) – Odex drilling in granite scree

2 drills for simultneous use with special arms and cradles.

Equipment machinery of any size and power is available for use in any situation. Our excavators are fitted with protective pads for roadway pavement preservation.

Nailed walls and berlinese walls

Drilling for reinforcement at -18 ml, Sète (34). Nail drilling at 30 ml with odex tubes EGT 3200 drill with automatic bar loader and PR 270 drill mounted on excavator

Drilling for reinforcement at -18 ml, Sète (34).

Slightly raised drill trajectory with Ø 200 odex over 30 ml to reach the bottom of an observation well in drainage tunnel Ø 1000 and 10 ml depth – Cliff at Biarritz (64)

Mast of excavator-mountedl hydraulic dril.
Excavation and installation of downward-inclined concrete blocks after berlinese wall, gunite spraying, anchor drilling and levelling out again

Nails, anchors and drains

Odex-drilling of 50 ml-subhorizontal drains in embankment

Nail reinforcement on collapsed wall situated down the road. Drilling with angle drive (providing torque transfer at righ angle) due to high-tension power line being situated juste above the works (work carried out with no electric power outage)

Socket pipe for IRS injection and P2 protection of Ø 40 mm Dywidag anchors.

Reinforcement of two collapsed walls in graveyard
– Nailed wall lined with reclaimed stones
– Drilling from crane truck

Nailing below ground level

Berlinese wall nailed down the road – Self-drilling injection nail – Col d’Ornon (Alpes – 38). Tracks equipped with rubber pads.

Reinforcement works on a site listed as a historical place – Royat (63) – Camera mounted on drill arm and receptor in excavator.

Gorge reinforcement following the collapse of part of RD 934 – Pyrénées Atlantiques (64).
1 drill station on excavator operating below ground level, 2 stations operating on ropes, one with ‘Blaireau’ DTH hammer, the other with CFL 68.

Specialized retaining structures

Reinforcement in a reduced space with pile walls and external reinforcement structures

Anchored berlinese wall and berlinese wall

Road, garden wall and house reinforced with:
anchored berlinese wall, nailed wall and sheet pile wall

Nailed wall in town for widening of road and embankment support – Wall lined with local stone

Wall nailed down the road – Col du Soulor – Hautes-Pyrénées

Coated berlinese wall with coping and fence.

Wall nailed up the road on RD
Lined with local stone

Nailed walls, braced with St Andrew’s crosses

Nailed walls, braced with St Andrew’s crosses

Several walls nailed up and down the road with anchored beam, riprap and wire netting – height 60 ml

Architectural anchored berlinese wall

Colored nailed wall to contain
landslide on hillside – Height85 m