Swissboring Overseas Piling Corporation since its establishment in U.A.E. has made valuable contribution to the Geotechnical Industry in U.A.E. by managing almost 21 no. rotary drilling rigs of various capacities.& We have been actively engaged in the geotechnical works from single storey villas to high rise towers from drilling shallow depths to as deep as 100.0 m below ground level.& RETENTION SYSTEMS Excavations are usually supported by reinforced bulkheads made of rectangular panels, or by ranks of piles. Rectangular panels can be executed by means of bentonite mud, through the excavation with buckets hydraulic or mechanic or by using hydrocutters.& Ranks of piles can be, in turns, made by means of traditional excavation techniques using drilling mud.& An advantageous alternative technique is the CSP ,Cased Secant Piles, which allows the execution of piles without drilling mud. This alternative offers organizational advantages for the site as well as lower costs due to the reduction of the material to be dumped.