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The Leading Edge In Underpinning Technology Underpinning Systems Certified Installers of > Vibrationless installation > No spoils to remove > Excellent lateral stability > From 10 ton to 50 ton loads! > Excellent solution for tight access and low headroom requirements NEW BUILD PILES - UNDERPINNING SYSTEMS-RETAINING WALLS This ring beam foundation for a water tank was 2.5’ thick x 8’ tall x 35’ diameter. When the tank was installed and start- ed to be filled with water, it started to compress the organic material just below the bottom of the foundation, which end- ed up sinking 5 -3/8”! CMI excavated down to the bottom of the foundation and installed 16 Stelcor grouted piles about 30’ below grade. These piles were load tested to 60 Tons! Counterforce underpinning brackets were then installed on each pile and the sinking foundation was transferred to the pile system. Hydraulic jacks were used to lift the structure back to it’s original elevation. After backfilling, CMI installed 33 Stelcor piles in the floor area, and a structural concrete floor was poured on top to support the rest of the tank load. TM
