重錘落下締固め工法における地盤の改良深度および改良程度に関する検討

Abstract

This paper examines the soil improvement effect (D_N, N^^-_2) of Dynamic Consolidation Method to sandy ground based on the past construction records. The main conclusions are summarized as follows. (1) D_N is the depth of the improvement required, taken as determined by the intersection of the two approximate curves of N-value before and after the improvement. Equations for estimating D_N are proposed. (2) Equations for estimating N^^-_2 are proposed, where N^^-_2 is the average of N-value after the improvement. (3) Proposed estimate equations are applied to two recently reported construction records, and the propriety of them is discussed.