Enhanced In-Situ Geo Testing — This 2-day course on enhanced in-situ testing includes a review of available methods for geotechnical site investigation, including soil borings with standard penetration testing (SPT), vane shear testing (VST), flat plate dilatometer (DMT), pressuremeter (PMT), and cone penetration testing (CPT), as well as geophysics applications, including crosshole (CHT), downhole (DHT), spectral analysis of surface waves (SASW, MASW, CSW). The emphasis focuses on CPT and her sisters, including piezocone (CPTU), and seismic piezocone (SCPTU) towards the basic evaluations of soil behavior type, geostratigraphy, and the interpretion of geoparameters, including: unit weight, relative density, effective friction angle of sands and clays, yield stress ratio, undrained shear strength, stiffness, elastic modulus, and the use of dissipation tests for assessing the coefficient of consolidation and permeability. Case studies from various geologic settings and applications are presented throughout the course. The SCPTU is particularly cost-effective and efficient as it provides 5 independent readings on soil behavior with depth: (1) cone tip resistance, qt; (2) sleeve friction, fs; (3) penetration porewater pressure, u2; (4) dissipation readings with time, t50; and (5) shear wave velocity, Vs. The value of shear wave velocity from SCPTU is featured as it provides the fundamental stiffness of the ground: i.e. Gmax = G0 = small-strain shear modulus. Detailed modules cover the evaluation of both static (flow) and cyclic liquefaction from CPT. The course addresses direct CPT methods for assessing the capacity and displacement response of both shallow & deep foundations, as well as new developments in penetrometer technology.
No prereqs
Taught by nobody this semester.