Figure F12. The T2P penetrometer is being co-developed at MIT, Penn State, and IODP-TAMU. It is designed to measure pore pressure and hydraulic conductivity in mudstones. The plot illustrates the dissipation at both the tip and the shaft after penetration in a December 2004 land deployment in Boston Blue Clay in Newburyport, Massachusetts (USA). Excess pore pressure ratio = (u uh)/(ui uh). u = pore pressure, uh = hydrostatic pressure, ui = peak insertion pressure.
Next Section | Table of Contents