Applicability of CPT for Construction Control of Seawall on Soft Clay Improved by Sand Drain Method

Increase in Undrained Shear Strength of Clay with Respect to Rate of Consolidation

“…After sv ? goes beyond point C, su starts to increase along the line from C to D. Fukasawa et al (2004) and Asada et al (2005) proved this view of increase in su by means of a series of direst shear test conducted for Osaka-bay clay and Ariake clay, respectively. The value of sv ?…”

“…8(b) at z W H＝0.7 represent the existence of thin sediment of volcano ash fallen about 6,300 years ago (Endo et al, 1995). Fukasawa et al (2004) reported that a sudden drop in pore water pressure was measured during CPTu penetration at the same depth. Based on this fact, consolidation analysis in this section expects this layer to be able to drain pore water.…”