SAFETY CONTROL OF EMBANKMENT FOUNDATION BASED ON ELASTIC-PLASTIC BACK ANALYSIS

概要

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A new procedure for predicting the ultimate bearing capacity of an embankment foundation is discussed, and its applicability to construction safety control is reviewed in connection with observational construction. The procedure developed in this paper consists of the following three processes : (1) An elastic consolidation back-analysis is performed by using the values monitored in the field. (2) Elastic-plastic soil parameters, for a constitutive model proposed by Sekiguchi and Ohta, are estimated by interpreting the elastic soil parameters obtained from the back-analysis of process (1). (3) Ultimate height of an embankment is computed by the coupled elastic-plastic deformation-water flow finite element analysis using the imaginary viscosity method. The procedure is applied to actual embankments, around which displacements are monitored, and is verified to be able to predict the subsequent settlement, as well as the safety factor of embankment foundation which periodically changes as construction progresses. An easy-to-understand diagram for safety control of embankment foundations is summarized in the form of a flow chart, so that engineers may apply it in engineering practice.
社団法人地盤工学会の論文
1989-06-15