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Retaining Walls and Earth Retention 20 SE Licensure and 26 GeoLegend: 38 Nature Sides with 44 Soil Nailing in Partial Practice Laws Harry Poulos the Hidden Flaw the 2010s MARCH // APRIL 2016 Retaining Walls AND Earth Retention Proudly published by the Geo-Institute of ASCE SierraScape Vegetated Wall Whatever you’re facing, Tensar Geogrid primary reinforcement we’ll help you face it. Tensar Retaining Wall Systems conquer any type of site Reinforced fill Mesa Wall challenge by combining structural integrity with functionality Retained and aesthetics. We oer a variety of facing options including Granular fill fill stone, vegetated, and architectural because there is no such Finished grade thing as one-size-fits-all. For more information on our complete line of retaining walls and steepened slope solutions, visit Foundation tensarcorp.com or call 800-TENSAR-1. March // April 2016 Features 38 Nature Sides with the Hidden Flaw 66 Highway Retaining Walls Are Assets Lessons learned from failures of earth-support systems. A risk-based approach for managing them. By James W. Niehoff By Mo Gabr, Cedrick Butler, William Rasdorf, Daniel J. Findley, and Steven A. Bert 44 Soil Nailing in the 2010s Its evolution and coming of age. By Carlos A. Lazarte, Helen D. Robinson, ON THE COVER and Allen W. Cadden Clockwise from top left corner: Stabilization of loess bluff using soil nail, anchored, and MSE 52 Emergency Retaining Wall walls along Mississippi River in Natchez, MS Replacement (courtesy of Hayward Baker, Inc.); Permanent The East 26th Street slide repair in Baltimore, MD. soil nail wall in the mid-western U.S. (courtesy of By Joseph K. Cavey, James A. Guinther, GEI Consultants, Inc.); Braced excavation during construction of Transbay Transit Center in San and Anthony E. Passaro Francisco, CA (courtesy of Brian Haux – SkyHawk Photography, skyhawkphoto.com); Anchored 60 Stabilizing Variable and Sloping soldier beam and lagging excavation support at Ground “The Shell” in Arlington, VA (courtesy of Steele Achieving innovation through adaptation. Foundation, LLC). By Mark K. Seel and Luis Berroteran CONNECT WITH US www.asce.org/geo twitter.com/GeoInstitute facebook.com/GeoInstitute LinkedInGeo GeoInstituteASCE 2 GEOSTRATA MARCH/APRIL 2016 GEOPIER IS GROUND IMPROVEMENT® Delivering cost-effective, reliable, engineered foundation systems PROVIDING CUSTOMIZED SOLUTIONS FOR ALL SOIL TYPES SEND US YOUR PROJECT DATA Geopier’s goal is to bring you advanced, innovative ground Let our geotechnical engineers customize a solution that meets your improvement technology in a way that is easy to use every day. needs. Submit your project details to receive a feasibility assessment Geopier Rammed Aggregate Pier® and rigid inclusion products and cost estimate at geopier.com/feasibilityrequest enable you to: • Improve variable fill soils in place • Replace deep foundations For more information call 800-371-7470, • Control settlement e-mail [email protected] or visit geopier.com. • Increase soil bearing capacities ©2016 Geopier Foundation Company, Inc. The Geopier® technology and brand names are protected under U.S. patents and trademarks listed at www.geopier.com/patents and other trademark applications and patents pending. Other foreign patents, patent applications, trademark registrations, and trademark applications also exist. SITEMASTER INCLINOMETER SOFTWARE EDITORIAL BOARD j James L. Withiam, PhD, PE, D.GE, M.ASCE, D’Appolonia [email protected] SiteMaster is a comprehensive inclinometer j J. Tanner Blackburn, PhD, PE, M.ASCE, Hayward Baker package used for processing and managing [email protected] inclinometer data. j Jeff Dunn, PhD, PE, D.GE, GE, M.ASCE, Arup March // April 2016 [email protected] j Morgan Eddy, PE, M.ASCE, Steele Foundation, LLC SiteMaster works with any inclinometer system [email protected] which produces a text data fi le. Data are stored j Ken Fishman, PhD, PE, M.ASCE, McMahon & Mann systematically in an easy to modify folder, with 8 President’s Letter Consulting Engineers [email protected] By Kord Wissmann corresponding displacement graphs organized j Brian Hubel, PE, GE, M.ASCE, Black & Veatch Corp. in a simple and effi cient manner. 10 From the Editorial Board [email protected] By Kenneth L. Fishman j Michael P. McGuire, PhD, PE, M.ASCE, Lafayette College [email protected] SiteMaster also features a reporting tool 11 Letters j Peter G. Nicholson, PhD, PE, D.GE, F.ASCE, allowing reports to be quickly generated and Nicholson Geotechnical 12 Technical Activities Update [email protected] exported in PDF or MS Word format. 16 COREBITS PEOPLE j William K. Petersen, PE, M.ASCE, Schnabel Engineering [email protected] For more information, please visit: www.geokon.com/SiteMaster 20 As I See It: SE Licensure and j Veronica L. Streich, PE, M.ASCE Partial Practice Laws [email protected] By Richard J. Finno j Chris Woods, PE, D.GE, M.ASCE, Densification, Inc. Departments [email protected] 24 As I See It: Geotechnical Reports 2015-16 G-I BOARD OF in the Hands of Others GOVERNORS By Martin Walker j Kord Wissmann, PhD, PE, D.GE, M.ASCE – President 26 Lessons Learned from GeoLegends: j Garry H. Gregory, PhD, PE, D.GE, M.ASCE – Harry G. Poulos Vice President j Youssef M. A. Hashash, PhD, PE, F.ASCE – Treasurer By Merve Gizem Bozkurt, Jiannan Chen, Hulya j Allen Cadden, PE, D.GE, F.ASCE – Past President with Digital Salihoglu, and Kuo Tian Digital Inclinometer System /Model GK-604D j James Collin, PhD, PE, D.GE, M.ASCE NEW! Compass 34 The GeoCurmudgeon: j Patrick J. Fox, PhD, PE, D.GE, M.ASCE On the Benefits of Being Different j Beth A. Gross, PhD, PE, M.ASCE The Model GK-604D Digital Inclinometer System By John P. Bachner Applications j Kancheepuram N. Gunalan, PhD, PE, D.GE, F.ASCE consists of a Model 6100D Digital Inclinometer Probe, 74 Look Who’s a D.GE j Brad Keelor – Secretary (non-voting) a cable mounted on a reel, which transmits the probe Landslides An interview with Tom Witherspoon Unstable Slopes GEOSTRATA STAFF signals via Blootooth© to a Handheld Field PC readout. Dam Embankments 76 G-I ORGANIZATIONAL j Stefan Jaeger – Publisher The latest model incorporates a Digital Compass to Landfi lls MEMBER NEWS j Dianne Vance, CAE – Director of Advertising [email protected] enable initial spiral surveys to be conducted using Slurry Walls 79 COREBITS CHAPTERS j Kristie C. Kehoe – Content Coordinator the same probe. In addition the pulley wheel, Caissons Piles 80 COREBITS INDUSTRY j Helen Cook – Content Editor cable-grip assembly grips the cable directly Sheet Piling 82 COREBITS CAREER j Elizabeth Cuscino – Content Editor thus taking the load off the cable markers and Tunnels j Sean Richardson – Production Manager 83 COREBITS CALENDAR preserving their spacing. ADVERTISING SALES MANAGERS 83 What’s Coming in May/June 2016 GEOSTRATA j Brooke King, Kelli Nilsson, McCall Mohanna GEOSTRATA DESIGN 84 GeoPoem: Sonnet on Earth Pressures j THOR Design Studio, www.thor.design By Mary C. Nodine GEOSTRATA is a forum for the free expression and interchange of ideas. The opinions and positions stated within are those of the authors, and not necessarily those of GEOSTRATA, the Geo-Institute, or the American Society of Civil Engineers (ASCE). GEOSTRATA—ISSN 1529-2975—is published bi-monthly by ASCE, 1801 Alexander Bell Drive, Reston, VA 20191-4400 and is a free ASCE/Geo-Institute membership benefit, not available by GEOSTRATA is published by the Geo-Institute subscription. ADDRESS CHANGES: ASCE/G-I members should and the American Society of Civil Engineers. e-mail [email protected], or click on “My Profile” at asce.org. Copyright © 2016 by the American Society of Civil Engineers. All rights reserved. Materials may not be reproduced or translated without written permission from ASCE. Periodicals postage paid at Herndon, VA, and at additional mailing offices. POSTMASTER: Send address changes to GEOSTRATA, 1801 Alexander Bell Drive, Reston, VA 20191-4400. The World Leader in Vibrating Wire Technology™ www.geokon.com/GK-604D 1 • 603 • 448 •1562 Geokon is ISSUE NO. 2 • VOLUME 20 4 GEOSTRATA MARCH/APRIL 2016 [email protected] ISO 9001:2008 www.geokon.com registered SITEMASTER INCLINOMETER SOFTWARE SiteMaster is a comprehensive inclinometer package used for processing and managing inclinometer data. SiteMaster works with any inclinometer system which produces a text data fi le. Data are stored systematically in an easy to modify folder, with corresponding displacement graphs organized in a simple and effi cient manner. SiteMaster also features a reporting tool allowing reports to be quickly generated and exported in PDF or MS Word format. For more information, please visit: www.geokon.com/SiteMaster with Digital Digital Inclinometer System /Model GK-604D NEW! Compass The Model GK-604D Digital Inclinometer System Applications consists of a Model 6100D Digital Inclinometer Probe, a cable mounted on a reel, which transmits the probe Landslides Unstable Slopes signals via Blootooth© to a Handheld Field PC readout. Dam Embankments The latest model incorporates a Digital Compass to Landfi lls enable initial spiral surveys to be conducted using Slurry Walls the same probe. In addition the pulley wheel, Caissons Piles cable-grip assembly grips the cable directly Sheet Piling thus taking the load off the cable markers and Tunnels preserving their spacing. The World Leader in Vibrating Wire Technology™ www.geokon.com/GK-604D 1 • 603 • 448 •1562 Geokon is [email protected] ISO 9001:2008 www.geokon.com registered Aggravated by your Boring Log software? Surprised by overusage charges? Shocked by lack of new functionality? 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