Stratigraphic profiling, slip surface detection, and assessment of remolding in sensitive clay landslides using the CPT

A multi-year cone penetration testing program was conducted at a landslide subject to episodic retrogression in Mud Creek, Ottawa, assess whether hand-operated mobile test (CPT) could yield new insights into the current degree of remolding under progressive failure metastable areas where conventional tracked rigs are unable gain access. The CPT rig permitted tests be performed through entire thickness Champlain Sea deposit rate 0.5 cm/s, with similar results standard 2 cm/s. Measurements pore pressure varied considerably size, magnitude response decreasing size. elevation slip surface identified tip resistance as point transition between remolded soil above and intact below surface, whereas further m required elevate pressures values indicative behaviour. In situ measurements shear strength corresponding layers profiles compared indicated that had 50% its fully strength.