Registration open: NHERI @ UTexas EF Annual Workshop

[announce at designsafe-ci.org]

What: Stiffness-based ground improvement monitoring workshop, NHERI at UTexas
Where: Portland, OR
When: Sept. 11-12, 2019

Registration now open on the DesignSafe website:
https://www.designsafe-ci.org/learning-center/workshop-190911/

You are invited to attend a workshop on Stiffness-based Ground Improvement
Monitoring in Portland, OR. This workshop is hosted by the NHERI EF at the
University of Texas at Austin (NHERI at UTexas) in collaboration with Portland
State University and the Center for Bio-mediated and Bio-inspired
Geotechnics (CBBG) at Arizona State University.

The workshop will be held from *1 pm Wednesday, Sept. 11 to 12 pm Thursday,
Sept. 12 2019*. The proposed workshop will include a half-day seminar at
Portland State University (on Sept. 11, 2019) followed by a half-day field
demonstration of field tests (on Sept. 12, 2019) of the NSF-RAPID Project
CMMI-1935670 (Project title: RAPID Liquefaction Mitigation of Silts using
MIDP and Field Testing with NHERI at UTexas Large Mobile Shakers, Project PI:
Arash Khosravifar).

The overall objective of Project CMMI-1935670 is to evaluate the potential
for microbially induced desaturation and precipitation (MIDP) via
dissimilatory reduction of nitrogen to mitigate liquefaction potential in
relatively fine-grained soils. The project addresses a major seismic
problem in Oregon, where a substantial portion of the infrastructure is
founded on non-plastic to low-plasticity silts that are susceptible to
liquefaction in a Magnitude 9 Cascadia Subduction Zone earthquake. The site
selected for study is near the Critical Energy Infrastructure (CEI) hub
located in northwest Portland, where 90% of the Oregon’s liquid fuel and
all jet fuels for Portland’s airport are handled. The seismic vulnerability
of fuel tanks at the CEI hub is a critical impediment to Oregon’s
resilience and energy reliability in the wake of a major earthquake. The
sensitivity of the fuel tanks to vibrations deterred the energy sector in
the CEI hub from using conventional ground improvement methods, which are
known to be intrusive; however, a bio-remediated technique that is less
intrusive may be a viable solution; hence, this workshop.

The NHERI at UTexas Stiffness-based Ground Improvement Monitoring Workshop
will highlight the potential use of NHERI at UTexas equipment for:

   1. direct-push, crosshole (DPCH) seismic testing to evaluate compression
   (P) and shear (S) wave velocities,
   2. in-situ shaking tests: small-to-medium strains, and
   3. long-term monitoring of compression (P) and shear (S) wave velocities.

Those with ideas about small, proof-of-concept tests that could piggyback
on the workshop and be used to generate preliminary proposal data are
encouraged to contact us in advance of the workshop. Please contact Farnyuh
Menq (fymenq at utexas.edu), NHERI at UTexas Site Operations Manager, with any
questions regarding the workshop, piggyback proof-of-concept tests, or the
equipment facility.

[image: UT-2-Shakers at 1x.png]
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