LIFECYCLE COST POST-EVALUATIONS ON SOFT GROUND TREATMENTS WITH ACTUAL CONSTRUCTION AND MAINTENANCE COSTS

Abstract

The paper analyzes the effectiveness of the applied treatments with reference to their actual lifecycle costs that are summations of actual construction and maintenance costs. The maintenance costs and residual settlements are collected for 10 years after the opening of Do-Oh Expressway for the section between Sapporo and Iwamizawa. Then, the relationship between maintenance costs and residual settlements has been analyzed and formulated. This study has also proved that the various treatments applied for the section are most effective ones and thus, far more cost effective than the alternative, i. e. construction of bridges on the soft ground section.