102 40 Screw Piles and Helical Anchors 34 Spread Footings Revisite

101 Pages·2015·13.08 MB·English

28 A Foundation 34 S pread Footings 40 S crew Piles and 46 F oundation
Engineering Trip Revisited Helical Anchors Engineering… 102
JANUARY // FEBRUARY 2015
FOUNDATIONS
Proudly published by the Geo-Institute of ASCE

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e-mail [email protected] or visit geopier.com. a perfect application for the Geopier SRT system. SRT is a
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and patents pending. Other foreign patents, patent applications, trademark registrations, and trademark applications also exist.
January // February 2015
Features
28 A Foundation Engineering Trip 52 E valuating Bridges with
Down the Mississippi Unknown Foundations for
Foundations for Mississippi River bridges from Susceptibility to Scour
Minnesota to Louisiana. North Carolina applies risk-based guidelines to over
By Dan Brown, Paul Axtell, and Steve Dapp 3,750 bridges.
By Mohammed A. Mulla
34 Spread Footings Revisited
Geotechnical advances lead to expanded use for 58 Bill Shannon and Stan Wilson
bridge abutments. Geotechnical pioneers with a 60-year legacy.
By Derrick Dasenbrock By Hollie Ellis
40 Screw Piles and Helical Anchors E2n8 gAi nFeoeurnindga tTiroinp 34 SprReeavdis Fitoeodtings 40H eSlcircaewl A Pnilcehso arnsd En4g6i Fnoeuernidnagt…io 1n0 2 ON THE COVER
180 years of use in geotechnical engineering. A worker prepares one of the many dowel
By Alan J. Lutenegger and Samuel P. Clemence JANUARY // FEBRUARY 2015 holes for post-tensioned threaded rods that
will be used to connect the old pile cap to a
new 8-ft–thick, reinforced concrete foundation
46 Foundation Engineering… 102 FOUNDATIONS pTohsisit cioonnesdtr uovcetiro tnh ew tilol pa lolof wth feo er xtihseti tnrga npsilfee rc oapf .
So much has changed in the years since Nat Fox first superstructure loads away from the damaged
experimented with select over-excavation existing H-Pile foundation to the new 48-in–
Proudly published by the Geo-Institute of ASCE diameter, drilled shaft foundations bearing
in his backyard.
on bedrock 175 ft below. This work is being
By Kord J. Wissmann performed in Wilmington, DE, as part of the
I-495 Emergency Repair Project on the piers
that had suffered foundation damage in 2014.
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2
GEOSTRATA JANUARY/FEBRUARY 2015
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Geo-Strata_0614_fin.indd 1 6/12/14 5:02 PM
January // February 2015
6 Letters
8 President’s Letter
By Allen Cadden
10 From the Editorial Board
By Morgan A. Eddy
12 COREBITS PEOPLE
Departments
14 COREBITS STUDENTS
16 A s I See It: Are We Getting Better?
By Alan Macnab
20 A s I See It: So You Call It Dirt?!
By Lakshmi N. Reddi
24 L essons Learned from
GeoLegends:
J. Carlos Santamarina
By Hai (Thomas) Lin, Yi Dong, Lusu Ni,
and Suguang (Sean) Xiao
64 The GeoCurmudgeon:
Tell Me a Story
By John P. Bachner
66 L ook Who’s a D.GE
An interview with Edward J. Garbin, Jr.
68 G -I ORGANIZATIONAL
MEMBER NEWS
72 COREBITS EVERYTHING G-I
74 C OREBITS CAREER
76 C OREBITS INDUSTRY
79 I FCEE 2015 Showcase of Exhibitors
96 G eoPoem: External Bracing
By Mary C. Nodine
GEOSTRATA is published by the Geo-Institute and the American Society of Civil Engineers.
4
GEOSTRATA JANUARY/FEBRUARY 2015
BIG
We Have News!

INTERPRET ANALYZE PREPARE
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terms described in the Creative Commons 3.0 Attribution License.
Professor of Geotechnical
Letters
Engineering
→ The Department of Civil, Environmental and
Geomatic Engineering (www.baug.ethz.ch) at
ETH Zurich invites applications for a Professor of 2C2o Fnustturruec otifo Unn Mdoerngitrooruinngd In4t2e Glleiog eITn tR eCvoomlpuatciotnio: nAut5o0 mInantoedva Mtoionnitso irni ng56 ICmopnrsotvriuncgt Uionnd Qerugarloituynd
Geotechnical Engineering. S2EP0T/1OC4TPGEEROFTOERCMHANNICCAEL M SOTRNUITCOTRUIRNEGS OF
SEPTEMBER // OCTOBER 2014 DDAATTAA MMAANNAAGGEEMMEENNTT SSYYSSTTEEMM AANNDD
CCOONNSSTTRRUUCCTTIIOONN MMOONNIITTOORRIINNGG RREESSUULLTTSS FFRROOMM
PERFORMANCE WWOOLLFF CCRREEEEKK DDAAMM RREEHHAABBIILLIITTAATTIIOONN
→ Candidates should hold a PhD degree in civil MONITORING OF
and/or geotechnical engineering and have a GSTEROUTCECTUHRNEICSAL BJVaanaym ndRe eMosybsi caeRh roBta saeBetlaen Zcm, ohPacuGncs;,,o PRPlaEoh,,b D PP ,RE GPo,E fM,f ;D . A.GSCE,E M; .ASCE;
strong background in mechanics of solids and
geotechnical engineering design as well as proved
etexapcehriinegn cdeo imn athines r. elevant research/industry and 000463_GPerooSturatda_lSye pptOuctb20l1is4_hFuelldBo obk_yF ItNhALe.in Gdd e 1o-Institute of ASCE 9/3/14 12:53 PM 000463_GeoStra3ta_2SeptOcGt2E01O4_SFTulRlBAooTkA_F ISNEAPL.TinEddM B32ER/OCTOBER 2014 9/3/14 12:54 PM000463_GeoStrata_SeptOct2014_FullBook_FINAL.indd 33 Figure 1. Completing deep seepage cutoff wall conswtrwucwt.iaosnc ein.o trigg/hget oquar3ter3s.9/3/14 12:54 PM
GEOSTRATA Now the Best Magazine in Our Field
→ The candidates should have a record of out- j j I was reading the GEOSTRATA September/October issue,
standing scientific/industrial achievements in and decided to send an email of thanks for the hard work.
geotechnical engineering and present a well- The Editor’s Letter is very interesting, not only for the
developed, novel and creative research programme summary regarding the history of the magazine (of which I
was not completely aware), but also for the description of
with a clear emphasis on cutting edge research
the new changes. I like the new format; its reorganization
(experimental research background is an asset).
of topics and its visual impact make the magazine more
They should be clearly committed to interdiscipli-
appealing. For example, pages 32-33 attract the immediate
nary research in an interdisciplinary environment.
attention of any geotechnical engineer.
A track record of and a strong desire to work with
For many years, I considered the ICE’s Ground
national and international scientific and professio-
Engineering journal (from the U.K.) as the best magazine
nal organisations are also important.
in our fi eld, but I think these days are gone. GEOSTRATA
really has become the one I look forward to reading. The
→ The candidates should be committed to excel-
collection of topics you have put together during the past
lence in education and support and implementation years is amazing. Very informative topics, easy to read and
of modern teaching methods in Geomechanics follow, and always with great construction pictures. At the
and Geotechnical Engineering courses. The new end of the day, that is what you want to see: amazing pictures
professor will be expected to teach undergraduate that illustrate the beauty of our profession. The magazine is
level courses (German or English) and graduate incredible, very enjoyable.
level courses (English). They must have a vigorous Thank you very much for continually improving this maga-
zine, for including new sections but also maintaining the older
record of scientific publication and externally
ones that help us to keep track of our profession. I am sure your
funded research or outstanding industrial achie-
work is appreciated by many others; it is just that we do not
vements, through individual and collaborative,
show it as often as we should!
national or international projects.
Sebastian Lobo-Guerrero, PhD, PE, M.ASCE
American Geotechnical & Environmental Services, Inc.
→ Please apply online at
Canonsburg, PA
www.facultyaffairs.ethz.ch
Send your Letters to the Editor to [email protected].
→ Applications should include a curriculum vitae,
Letters may be edited for space and clarity.
a list of publications, a list of projects carried out
to date and a teaching and research statement. Errata
The letter of application should be addressed to The bio for Dr. Jinsong Huang on p. 48 of the November/
the President of ETH Zurich. The closing date for December 2014 issue should have included a reference
applications is 15 February 2015. ETH Zurich is an that he is Research Academic at the Australian Research
equal opportunity and family friendly employer and Council Centre of Excellence for Geotechnical Science and
is further responsive to the needs of dual career Engineering, University of Newcastle, NSW, Australia.
couples. We specifically encourage women to apply.
Letters
EDITORIAL BOARD
j James L. Withiam, PhD, PE, D.GE, M.ASCE, D’Appolonia
[email protected]
j J. Tanner Blackburn, PhD, PE, M.ASCE, Hayward Baker
[email protected]
j Jeff Dunn, PhD, PE, D.GE, GE, M.ASCE, Arup
jeff [email protected]
President’s Letter j Morgan Eddy, PE, M.ASCE, Steele Foundation, LLC
[email protected]
j Ken Fishman, PhD, PE, M.ASCE, McMahon & Mann
Consulting Engineers
kfi [email protected]
j Beth Gross, PhD, PE, M.ASCE, Geosyntec Consultants
[email protected]
j Brian Hubel, PE, GE, M.ASCE, Black & Veatch
Corporation
As we enter a new year, Washington is [email protected]
experiencing change, the markets are an j Peter G. Nicholson, PhD, PE, D.GE, F.ASCE, University of
Hawaii at Manoa
ever-changing conundrum, computers and [email protected]
j William K. Petersen, PE, M.ASCE, Schnabel Engineering
devices change faster than we can fi gure [email protected]
j Veronica L. Streich, PE, M.ASCE, HNTB Corporation
out how to fully use them, and friends and
[email protected]
colleagues change as well.
2014-15 G-I BOARD OF
GOVERNORS
One thing that does not change is the fact that fi nding
ALLEN CADDEN j Allen Cadden, PE, D.GE, M.ASCE – President
solutions to problems is a team effort. When we bring
j Kord Wissmann, PhD, PE, D.GE, M.ASCE –
together the best people with the combination of skills
Vice President
needed, solutions are found: often the best solution, and defi nitely a better
j Garry H. Gregory, PhD, PE, D.GE, M.ASCE – Treasurer
solution than I could have come up with on my own. I could only wish to be an
j William M. Camp, III, PE, D.GE, M.ASCE – Past President
expert in everything. However, I recognize my limitations, and when a problem
j Patrick J. Fox, PhD, PE, M.ASCE
is presented, I’m not afraid to bring in the best people to work together and fi nd
j Beth A. Gross, PhD, PE, M.ASCE
the right solution. I always like to say, “surround yourself with really smart people,
j Kancheepuram N. Gunalan “Guna”, PhD, PE, D.GE,
they make you look good.” F.ASCE
As an aside, the market and economy as well as scope of projects today have j Youssef M. A. Hashash, PhD, PE, F.ASCE
enlightened me that sometimes the best experts for a project work for your competi- j Robert Schweinfurth, A.M.ASCE – Secretary
tors, so partnering to solve challenges also creates opportunities for new alliances. non-voting Board member
If we refl ect on engineering challenges we face as civil engineers, we need a vari-
GEOSTRATA STAFF
ety of expertise ranging from geotechnical (I had to say that one fi rst) to civil design,
j Stefan Jaeger – Publisher
structural, traffi c planning, environmental, and hydrology, etc. These disciplines
j Dianne Vance, CAE – Director of Advertising
are often unique, but occasionally overlap. There are important efforts underway to [email protected]
encourage and often require continuing education to remain competent in our areas j Robert Schweinfurth, A.M.ASCE – G-I Director
of expertise as part of our responsibility to maintain our professional licensure. There [email protected]
are further efforts to develop designations such as Diplomate status from AGP and j Jennifer M. Canning – Content Editor
specialty licensure to recognize a higher level of competency in a discipline. j Elizabeth Cuscino – Content Editor
The challenge we will face, however, as these designations gain acceptance, is j Kristie C. Kehoe – Content Coordinator
to ensure that recognizing one’s accomplishments does not preclude another from j Helen Cook – Content Editor
practicing in an area in which they are dully qualifi ed: Particularly when there is not a j Sean Richardson – Production Manager
unique designation and defi nition of services for that skill set. Confusing, yes, but the
ADVERTISING SALES MANAGERS
Earth Retaining Structures Committee brought just such a condition to our attention.
j Amy Hakim, Kelli Nilsson, Brooke King
The Structural Engineering Licensure Coalition (SELC) advocates that jurisdictions
require S.E. licensure for anyone who provides structural engineering services for GEOSTRATA DESIGN
designated structures. SELC recommends that each licensing board adopt rules to j THOR Design Studio, www.thordesignstudio.com
defi ne appropriate thresholds for these structures. The scope of designated structure
GEOSTRATA is a forum for the free expression and interchange of
coverage from state licensing boards has included such items as retaining walls. ideas. The opinions and positions stated within are those of the
authors, and not necessarily those of GEOSTRATA, the Geo-
Although structural engineering can be a signifi cant component of retaining walls,
Institute, or the American Society of Civil Engineers (ASCE).
many systems are predominantly soil structure interaction problems. More specifi - GEOSTRATA—ISSN 1529-2975—is published bi-monthly by ASCE,
1801 Alexander Bell Drive, Reston, VA 20191-4400 and is a free
cally, geosynthetic reinforced walls, soil nail walls, and even excavation bracing system
ASCE/Geo-Institute membership benefit, not available by
designs are heavily controlled by geotechnical issues. Often the fi ner details of the subscription. ADDRESS CHANGES: ASCE/G-I members should
e-mail [email protected], or click on “My Profile” at asce.org.
geotechnical issues have a signifi cant impact on the design of the retaining system.
Copyright © 2015 by the American Society of Civil Engineers. All
Led by Allen Marr working with our new Governor Youssef Hashash, a joint rights reserved. Materials may not be reproduced or translated
without written permission from ASCE. Periodicals postage paid at
Geo-Institute and Structural Engineering Institute, task force is now forming to study
Herndon, VA, and at additional mailing offices. POSTMASTER: Send
continued on page 11 j j address changes to GEOSTRATA, 1801 Alexander Bell Drive, Reston,
VA 20191-4400.
8
GEOSTRATA JANUARY/FEBRUARY 2015
ISSUE NO. 1 • VOLUME 19