Modification method of soil parameters identified by inverse analysis and settlement prediction of soft ground

Abstract

A settlement prediction method of soft ground is discussed in this paper. The method is based on the settlement data measured previously at the same site or the neighboring site of new construction. The prediction procedure proposed here are as follows. Firstly, the coefficients of volume compressibility and permeability are identified by inverse analysis. The analysis is limited to the one-dimensional problem here. Secondly, the identification results are modified based on the distribution of the initial void ratio, the relationship between the initial void ratio and the coefficient of volume compressibility, which were obtained from conducted consolidation tests, and the in-situ effective vertical stress. The procedure of the parameter modification has two patterns in the proposed method. The procedure pattern (1) corresponds to the case that the identified parameters are applied to the settlement prediction of the new construction in the neighboring site of the previous measurement site. The procedure pattern (2) corresponds to the case that the new construction is carried out on the same site, in which the settlement behavior was measured during the previous construction. The method is applied to the results of the laboratory model consolidation tests in this research to verify the applicability of the proposed method.