BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:America/Los_Angeles X-LIC-LOCATION:America/Los_Angeles BEGIN:DAYLIGHT TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:b9e01ea974b1c973998ee990e12fc78f97 CATEGORIES:Regional Meeting SUMMARY:OC REGIONAL DINNER MEETING June 2019 LOCATION:Maggianos Little Italy\, 3333 Bristol St.\, Costa Mesa, CA 92626\, USA DESCRIPTION:
Presented By: Dr. Ahmed Elgamal, UCSD
Please join us on Tu esday June 11th at Maggiano's by South Coast Plaza for a ground breaking (s haking?) presentation on cutting edge research completed by UCSD graduate s tudents in partnership with one of CalGeo's affiliate members. This researc h project was instigated at our 2018 Annual Conference in Santa Rosa when C liff Frazao from EagleLift suggested a research topic to the UCSD students in attendance. We are pleased to announce that preliminary research tests h ave been completed and papers are being furiously written and submitted. Ge t a first look at this new technology for liquefaction mitigation!
A shake table testing program is conducted at the Universit
y of California, San Diego to assess potential of the polymer injection tec
hnique as a liquefaction countermeasure. Each test is instrumented with acc
elerometers, pore pressure sensors and displacement transducers in order to
provide insights into the dynamic response of the soil and foundation syst
em. Furthermore, two Cone Penetration Tests (CPT) are performed pre- and po
st-injection to assess the extent of soil improvement.
Strong b
ase excitation is imparted by the shake table, resulting in liquefaction an
d excessive foundation settlement in the original benchmark experiment. In
the second test, after application of the polymer injection countermeasure,
major reduction is observed in the tendency for liquefaction, and in the r
esulting foundation settlement. Careful excavation after the shaking event
provided additional insights as to configuration of the solidified polymer
within the sand stratum, increasing the overall soil confinement, and provi
ding solidified load paths for the shallow foundation load towards the more
competent stratum. As such, these mechanisms have the potential to provide
for: i) a marked increase in the soil resistance to liquefaction, and ii)
a significant reduction in settlement of overlying shallow foundations.
This testing program is a first of its kind, and offers insight int
o the behavior of liquefiable ground remediated by the polymer injection te
chnique. The potential for effective outcomes is highlighted, and efforts t
o establish analysis and design guidelines are warranted.
Ahmed Elgamal is a professor in t he Department of Structural Engineering at the UCSD Jacobs School of Engine ering. Prior to UCSD, Elgamal was a faculty member at the Rensselaer Polyte chnic Institute and Columbia University, and technical director for the Ren sselaer Geotechnical Centrifuge Research Center. He studied Civil Engineeri ng and Engineering Mechanics at Cairo University (B.Sc.), and Princeton Uni versity (M.A. and Ph.D.), and was a research fellow at CalTech. He is a rec ipient of the Shamsher Prakash Award and the NSF Presidential Young Investi gator Award. Elgamal was also a Lilly Teaching Fellow (1991-1992). He is a member of the American Society of Civil Engineers. Professor Elgamal served as chair of the Department of Structural Engineering from 2003 to 2007.
5:45pm Registration & Cocktails (sponsored by EagleLift)
6:30pm Dinner
7:15pm Presentation
8:30pm Conclusion
Cost: $50 CalGeo Members, $65 Non-members, $20 Students
THIS EVENT IS SOLD OUT!
We will be recording the presen tation and it will be available to CalGeo members on theĀ Members Club page within a day or two.
Thank you to EageLift for insti gating this research project at UCSD and for being our bar sponsor! Cheers!
CONTACT:Kelly Cabal, kelly@calgeo.org (949) 391-2436 with any questions. DTSTAMP:20240328T130611 DTSTART;TZID=America/Los_Angeles:20190611T174500 DTEND;TZID=America/Los_Angeles:20190611T210000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR