Enhanced In-Situ Testing for Geotechnical Analyses and Foundation Design
The course provides an overview on the types of in-situ geotechnical tests (SPT, CPT, CPTu, DMT, PMT, VST) and geophysical methods (Refraction, CHT, DHT, SASW), and places special emphasis on the utilization of the expedient SCPTu (and related SDMTa) for efficient collection of site-specific data for geotechnical investigations. Up to five independent readings on soil response are collected in a single sounding, particularly the tip stress, sleeve friction, porewater pressure, time dissipations and downhole shear wave velocity. Interpretative methods are reviewed for obtaining a suite of soil parameters and properties often required in geotechnical analyses, especially numerical modelling simulations. The usefulness of the small-strain shear modulus (Gmax), obtained from field shear wave measurements, is documented as an initial state parameter, representing the beginning of all stress-strain-strength curves (drained, undrained, static and dynamic). Numerous case studies are interwoven to show the general applicability of the approaches in soil behavior, as well as direct applications to full-scale foundation response.
Geotechnical engineers, site planners, foundation designers, tract developers, and construction engineers involved with building sites, foundation installation, land construction, numerical analyses and real estate development
How You Will Benefit
Learn various methods to determine soil stratigraphy.
Evaluate geotechnical design parameters for analytical and/or numerical simulation of foundation response.
Use up-to-date methods for assessing ground conditions and soil parameters for shallow and deep foundation systems from in-situ test data.
In-situ testing introduction
Effective friction angle from in-situ tests
Critical state soil mechanics for dummies
Profiling OCR in clays, silts, and sands by CPTU and DMT
First-order preconsolidated evaluation from in-situ tests
Undrained shear strength
Evaluation of Ko in soils
Permeability and coefficient of consolidation from piezo-dissipation tests
Piedmont residual soils
Equivalent elastic soil modulus
Stiffness and stress-strain-strength response of soils
Nonlinear footing response
Axial pile response from SCPTU
Future directions and research
Manual on Subsurface Investigations (2002)
Circular on Interpretation of Soil & Rock Properties (2002)
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