Reinforced concrete diaphragm wall
SEFI-INTRAFOR
-Major urban excavations in the aquifer
-Underground reservoirs or access shafts to deep sewers
-Open or below grade trenches :
highways
railways
underground railways
-Deep, load-bearing foundations :
linear X or H-shaped supporting
walls to lower high loads
retaining walls
MAIN PLANT USED
-Cable-operated grab :
width from 520 to 1520 mm
mounted on standard or hydraulic crane
-Hydraulic grab with Kelly :
guided and equipped with inclinometer controlling verticality
possibility of correcting verticality with the so-called "active grab"
-Hydraulic cutter
used in hardened ground
