In many situations, access is the main constraint
on a worksite :

  • interventions in high mountain areas
  • underpinning works
  • tunnel works
  • any work carried out in a confined space
  • cliffs, gorges
Helicopter transfer of ‘bigs bags’ of concrete to the worksite

Techniques used :

  • helicopter transport
  • reduced-size, demountable machinery
  • autonomous equipment
  • ventilation devices
  • lighting devices
  • on-site living and office facilities
  • rope works
  • spider excavators
Excavation works with spider excavator

Base camps

Comprehensive autonomous facilities in mountain area
Sharing the pleasures of mountain living with its dwellers
Transportation by helicopter of on-site facilities to the worksite

Materials transportation with our special vehicles « Quad 6×6 »

Helicopter transportation

Preparation of the DZ (drop zone) for lift-off
Transfer of the projected concrete station to the worksite
ransfer of the compressor for blasting
or projected concrete to the worksite

Transportation by helicopter and acrobatic access works

Casting fresh concrete for mountain works – Mérens les Vals (Ariège)
Concrete mixer truck feeding the skips brought to the site by helicopter. Well filling in the Chassezac gorges (Ardèche)
Acrobatic drilling on cliff at the CFL 68
Concrete being projected from a cliff onto the back of a building using acrobatic work methods

Spider excavators

Hillside stabilization after Blasting.
Stabilization realized with a special excavator-mounted tool and a spider excavator held by two hoists

Craning of spider excavator at bottom of wall to access worksite on the Tarn river
– Saut de Sabo

Stabilization and excavation works at bottom of small cliff
Creation of a hillside access with
5T mini-excavator and HRB Altitude 2500 m

Work in confined spaces

Surveying clean-up operations for a very deep mine well in order to devise and install a permanent sealing system
Forced ventilation for tunnel repair
Preparing to inject a sinkhole in an old sanitation tunnel (Béziers – 34)

Reinforcement of small-section tunnel using dry-projected concrete