Moscow City, Russia

Several large high-rise projects in Moscow have required foundations through the Voskrensky clay layer and into the Suvorov Limestone. Since the behaviour of the Limestone is relatively unknown pile tests have been recommended to verify the foundation designs. Bi-directional testing using O-cells was employed as these tests are particularly appropriate for verifying rock socket behaviour. Tests were performed on 900 mm and 1200 mm diameter piles, located on three separate plots, mobilising total capacities in excess of 60MN.

LOADTEST have been contracted to perform tests on four of these plots. Total mobilised capacities were in excess of 40MN on Plots 9 and 10, and capacities of over 60MN were achieved on Plot 13. The effective mobilised capacity in each of the test piles was carried out to the desired maximum loading, and upon request taken to higher loads; in the case of plot 13, the piles were tested to twice the required capacity.

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