Deep Dynamic Compaction with Trine Replacement (DDRP) It is implemented by lifting a concrete cube weighing 20 tons upwards to a height of 20 meters and then leaving it A free fall falls from above and hits the ground, transferring the high impact energy to The soil is compacted, leaving behind a deep pit (crater) as a result of soil subsidence. is filled This drilling with the tooth (breaking the stone), and this process is done in three stages with a number of Specific beats for each stage Square is the first company in this field in Egypt, as it was implemented under the supervision of the Works Engineering for the Armed Forces