Georgia Tech – Global Learning Center, Fifth & Spring Street, Atlanta GA
- GT GLC at Tech Square: 84 Fifth Street NW, Atlanta, Georgia 30308
- Georgia Tech Professional Education – Online Registration: www.pe.gatech.edu
- Registration opens at 07:30 a.m.
- Class Sessions both days from 08:00 a.m. to 5:00 p.m.
- Continuous Break – Food & Drink Refreshments of all sorts all day long.
- Hard copy notes
- Free CD electronic version of notes and reference materials
- Instructor: Professor Paul W. Mayne, PhD, P.E.
Online Registration: www.pe.gatech.edu
ABSTRACT
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, CSW, MASW, PSW, and ReMi), and places special emphasis on the utilization of the expedient SCPTù (and related SDMTà) for efficient collection of site-specific data for geotechnical investigations. Up to five independent readings on soil response are collected in a single sounding, in particular, the cone tip stress (qt), sleeve friction (fs), porewater pressure (u2), time rate dissipations (t50), and downhole shear wave velocity (Vs). Interpretative methods are reviewed for obtaining a suite of soil parameters & properties often required in geotechnical analyses, especially numerical modelling simulations. The importance and usefulness of the small-strain shear modulus (Gmax), obtained from shear wave velocities, is documented as an initial state parameter, representing the beginning of all stress-strain-strength curves (drained, undrained, static, dynamic). Numerous case studies are interwoven to show the general applicability of the approaches in soil behavior, as well as applications to full-scale foundation response. The use of Gmax in shallow and deep foundation performance is demonstrated, specifically in the derivation of load-displacement-capacity evaluations. Methods of indirect and direct capacity assessment by CPT are reviewed.
WHO SHOULD ATTEND
Geotechnical engineers, site planners, foundation designers, tract developers, structural, civil, and construction engineers involved with heavy construction, site investigation, building sites, foundation systems, and land development should attend this course. The use of modern methods for assessing soil parameters for shallow & deep foundation systems from in-situ test data. Students will receive a full set of hard copy notes, plus a free CD with the notes and affiliated documents, including the NHI Manual on Subsurface Investigations (2002), FHWA Evaluation of Soil & Rock Properties (2002), and NCHRP (2007) Synthesis 368 on Cone Penetration Testing, as well as separate NSF, GTRC, and ARO reports on related topics.
COURSE OUTLINE – 2 day event
01 – In-Situ Testing Introduction
· Drilling and Sampling
· Overview of various in-situ tests, including:
o Standard Penetration Testing (SPT)
o Vane Shear Test (VST)
o Flat Plate Dilatometer Test (DMT)
o Pressuremeter Test ( PMT)
o Cone Penetration (CPT)
o Piezocone (CPTu)
02 – Geophysical Methods
· Mechanical waves (compression P-, shear S-, Rayleigh R-waves)
· Methods for measurement by in-situ geophysics, including:
· Refraction (RF), Crosshole (CHT), Downhole (DHT), Surface Waves (SASW), and direct push methods (SCPT and SDMT)
· Electromagnetic Waves: ground penetrating radar (GPR), surface electrical resisitivity (SER), and electrical conductivity (EM).
03 – Effective Friction Angle from In-Situ Tests
· Drained Penetration – clean quartz sands
· Case Study – west campus – Georgia Tech
· Undrained Effective Penetration Method NTH Method)
· Case Studies: Sandpoint, Idaho; Newbury, Massachusetts.
04 – Critical State Soil Mechanics for Dummies
· Overview on CSSM in simple terms
· Shear strength and consolidation
· Supporting lab and oedometer data
05 – Profiling OCR in Clays by CPTU and DMT
· Cavity Expansion-Critical State Formulation
· Type 1 and 2 piezocones
· Calibrations with laboratory chamber tests
· Field case studies
· Approach for flat plate dilatometer
06 – First-Order Preconsolidation from In-Situ Tests
· Approximate methods for evaluating Pc’ from in-situ tests in all soil types
· Cone, Piezocone, Dilatometer, Vane, Pressuremeter, and Vs
· Case studies: 1. Port of Anchorage, Alaska; 2. Sandpoint, Idaho; 3. Blessington Sands
· New 2014 generalized approach for sands, silts, and clays
(Presented at 2014 ASCE GeoCongress)
07 – Undrained Shear Strength
· Characteristic Mode
· Strength Anisotropy
· Sampling Disturbance Effects on Lab Results
· Case Study – Troll Offshore Site, North Sea
· Case study – Cooper Marl, Charleston, SC
08 – Evaluation of Ko in Soils
· General Ko-OCR relationships in Soils
· CPT Calibration Chamber database method for quartzitic sands
· Case study applications
09 – Permeability & Time Rate: Piezo-Dissipation Tests
§ Monotonic Porewater Pressure Decays
§ Strain Path Solution
§ Dilatory Response
§ Piezodissipation testing at the “dark chocolate” clay
Canadian Geotechnical Test Site 1, Gloucester, Ontario
10 – Piedmont Residual Soils
· Nontextbook Geomaterials
· Opelika National Geotechnical Experimentation Site
11 – Stiffness and Equivalent Elastic Soil Modulus
· Importance of Initial Small-Strain Shear Modulus (Gmax)
· Strain and stress-level dependency
· Foundation displacements evaluated by elastic continuum solutions
· Case study: Dorm B mat settlements evaluated by DMT
12 – Nonlinear Stress-Strain-Strength of Soils
· Approximate nonlinear stress-strain-strength evaluations from SCPT
· Case studies for clay test sites
· Case studies for undisturbed sands sampled by freezing methods
13 – Nonlinear Footing Response
· Hybrid limit plasticity-elastic solutions for load-displacement capacity
· Class “A” and “C” Predictions – Case Studies at TAMU, Bothkennar, Belfast
· Direct CPT method for shallow footings based on full-scale load tests
14 – Axial Pile Response from SCPTu
· Direct vs Indirect (rational) CPT Methods for Capacity
· Elastic Continuum Framework for Displacements
· Applications to Osterberg Load Cell
· Selection of Case Studies from the following:
1. Amherst NGES soft clay, Massachusetts
2. Texas A&M NGES College Station
3. Opelika NGES, Alabama
4. I-85 Drilled Shaft Foundation, Coweta County, Georgia
5. GT Campus, Atlanta, GA
6. Southern Companies, Jackson County, GA
7. GDOT Viaduct O-Cell in Piedmont Residuum at CNN, Atlanta
8. The 2009 Michael W. O’Neill Lecture (CIGMAT, Houston)
9. Foothills Medical Center (O-Cell), Calgary, Alberta
10. Arthur Ravenel Bridge, Charleston, SC
11. Golden Ears Bridge, Vancouver (O-Cell).
12. Large driven open pipe at Euripides site, Holland
13. Pitt River Bridge, BC
14. Pinners Point Interchange, Virginia
15 – Future Directions & Research
· · Upcoming advances in field testing and in-situ test devices:
a. T-bar
b. PROD (offshore robotics)
c. Ball penetrometers
d. RotoAutoSeis
e. Frequent-interval shear wave profiling (FiSDMT)
f. Continuous shear wave profiling (CiSCPTu)
g. Clustering (geostatistics)
h. ShearPro (program to reduce downhole data by cross-correlation)
i. Twitch testing (rate effects and delineation of drained-semi-drained-undrained response) and other improvements in field procedures and data processing are discussed.
· SPECIAL LECTURES:
Epilogue CPT’14 – KEYNOTE
3rd international symposium on cone penetration testing, Las Vegas (May 12-14, 2014): www.cpt14.com
Online Registration: www.pe.gatech.edu
Course ID CIVE 2001p
DLPE: Phone: 404.385.3500
Distance Learning & Professional Education
Contact Representatives:
Catherine Shaw: catherine.shaw@pe.gatech.edu
Chris Walker: chris.walker@pe.gatech.edu
Respectfully yours
Paul
Paul W. Mayne, PhD, P.E.
Professor – Geosystems Engineering Group
School of Civil & Environmental Engineering
Georgia Institute of Technology
Mason Building 2245
Atlanta, GA 30332-0355
Phone: 404-894-6226
Fax: 404-894-2281
Email: paul.mayne@ce.gatech.edu
GT In-Situ: http://geosystems.ce.gatech.edu/Faculty/Mayne
CEE Website: www.ce.gatech.edu/research/geosystems
Vice President for North American: www.issmge.org
Technical Committee on In-Situ Testing: www.webforum.com/tc16
ASCE GeoCharacterization – Atlanta – Feb 2014: www.asce.org/geo
3rd IS Cone Penetration Test (Las Vegas 2014): www.cpt14.com
3rd IS Frontiers in Offshore Geotechnics – Oslo – June 2015: http://www.isfog2015.no
XVI European Conf. Soil Mechanics and Geotechnical Engineering – Sept 2015. Edinburgh: xvi-ecsmge-2015.org.uk
XV PanAmerican Conf. Soil Mechanics & Geotechnical Engineering – Nov. 2015 Buenos Aires: conferencesba2015.com.ar
