Suggestions on Checking Computation of Underlying Stratum With Soft Soil in Pile Foundation

The different methods of checking computation of underlying weak layer in pile foundation which are suggested in different codes or handbooks are analyzed. Some suggestions are proposed:the self-weight stress of soil which is between the base of cap and ground surface are added in or subtracted from separately in different stress calculations, the shaft friction around the pile group which is deducted in computation of additional stress is the characteristic value rather than limit value, and the checking computation is carried out from ground surface of basement in the case of strip footing and individual footing in basement.