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Advantages the DMT Can Bring to Your Next Project

The Flat Plate Dilatometer test (DMT) can be used to investigate soil properties and has many applications in geotechnical engineering.  Dilatometer testing has several benefits compared to other standard-of-practice in situ methods, such as the Standard Penetration Test (SPT) and Cone Penetration Test (CPT). Benefits of the DMT include the direct measurement of the small strain elastic modulus of the soil.  Additional geotechnical engineering parameters can be evaluated with the dilatometer data including lateral stress, shear strength and overconsolidation ratio.  The Dilatometer testing method is considered to be less intrusive to the soil than the SPT and CPT, allowing GRI to more accurately characterize the in situ soil strength and stiffness.

Because the test directly measures the elastic modulus of the soil, estimated foundation settlements are less conservative than traditional analysis methods.  The settlement evaluation can be completed using a linear elastic modulus based settlement evaluation with the foundation load and footprint.  Case studies have shown settlements estimated using the DMT elastic modulus are in good agreement with field measurements, generally out-performing estimates from SPT, CPT, or consolidation tests(Monaco et al., 2007).  DMT results also allow us to quickly estimate shear strength profiles, soil types, preconsolidation stress, overconsolidation ratio, and effective stress friction angle.

Engineering Applications of DMT Data

DMT4-reduced – Settlement Analysis of Shallow Foundations
– Liquefaction Analysis
– Slope Stability Analysis
– Deep Foundation Design
– Soil Characterization

The DMT was acquired by GRI in 2013 when Wes Spang joined GRI as a Principal.  Wes has over 30 years of experience and has been using the DMT for geotechnical design for the past 20 years.  Our other in-house DMT specialist is Jason Bock, a project engineer who has 10 years of experience and about 5 years of experience using the DMT for soil characterization and foundation design.

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GRI and KPFF Win the 2015 COPRI Project Excellence Award for Port Of Newport International Terminal Renovation

COPRI Blog Photo2The Coasts, Oceans, Ports, and Rivers Institute (COPRI) announced in June that the 2015 Project Excellence Award in the Large Project Category was awarded to GRI and KPFF Consulting Engineers for the Port of Newport International Terminal Renovation.  GRI Principal, Scott Schlechter accepted the award at the ASCE ceremony held in Boston, Massachusetts earlier this month.  This project also received the ACEC-Oregon 2014 Grand Award for Engineering Excellence in the Transportation-Marine/Ports Category.

The Port of Newport International Terminal is located in Yaquina Bay on the Pacific Coast in Newport, Oregon, and serves the fishing and timber industries of the Northwest.  Due to major deterioration of the WWII concrete hull ships that were sunk to create the berths, significant portions of the Ports facility were shut down.  Goals for this project were to develop a design to renovate the facility that could be implemented in phases as funding was available and to create a terminal that would once again serve the large fishing and timber industry in the area.  It was also necessary to remediate ongoing contamination issues that developed as the most unstable ship continued to break apart and leak fuel-based contaminants into the bay.

Success of the project has allowed the Port of Newport to fulfill its mission to build and maintain waterfront facilities and promote/support projects and programs in cooperation with other community organizations and businesses that will retain and create new jobs and increase community economic development.

GRI has been involved with this project since 2000.  We worked closely with the owner, design team, and CM/GC contractor to select the design and construction alternative that best met the challenging geotechnical, structural, environmental, and financial constraints of the project.  The project was successfully completed in November 2013.

GRI is honored to have been a part of such a challenging but rewarding project, and we strive to continue to deliver the same degree of excellence to every project.

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GRI Welcomes Three New Team Members!

Mike, Lindsi, and Christina joined our Beaverton office in August 2015.  Mike and Lindsi have been extremely busy in expanding our pavement engineering group and are currently developing new strategies to enhance GRI’s services.  Christina was sent to the field during her first week and is currently shadowing our project engineers for several of our projects.

MaloneyMike Maloney, PE
Principal Pavement Engineer

Mike brings with him 27 years of pavement engineering experience, including pavement management, forensic investigations, and pavement designs for virtually every type of pavement.  He has completed numerous projects for ODOT, the Port of Portland, TriMet, and every major city and county throughout Oregon and southwest Washington.  He has provided rehabilitation recommendations for over 1,000 miles of roadway and 750 acres of airfield and industrial yard pavement.

 

 

 

 

 

HammondLindsi Hammond, PE
Project Engineer

Lindsi has more than seven years of pavement engineering experience.  Her project work includes pavement management, pavement evaluation, and pavement design.  As a project engineer, she is responsible for completing the implementation and update of pavement management systems for airport and roadway systems, backcalculating falling weight deflectometer (FWD) data, and designing pavements using AASHTO, Asphalt Institute, FAARFIELD, PerRoads, PCASE, and Portland Cement Association methods.

 

 

 

 

 

Jones-2Christina Jones, EIT
Staff Engineer

Christina just finished her master’s degree in civil engineering at the University of Colorado.  For her master’s research, she worked with a research group  and conducted centrifuge experiments studying the seismic response of deep, braced excavations near high-rise buildings at the Center for Geotechnical Modeling at the University of California, Davis.

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GRI Adds Pile Driving Analyzer (PDA) Testing Services

20150210_124246GRI specializes in engineering services for deep foundations and dynamic pile load testing with the Pile Driving Analyzer (PDA).

The advantages of using our PDA
services include the following:

 – Reduces Project Costs
 – Confirms Pile Capacity Estimates
– Evaluates Pile Damage or Integrity
– Provides Pile Hammer Efficiency
– Provides Pile Stresses During Driving
– Less Expensive than a Static Load Test
– Quicker Results than a Static Load Test

The PDA provides cost savings on projects with the use of higher resistance factors allowed by building codes and reduces unnecessary pile lengths/cost.  GRI owns and operates the PDA Model 8G 4 Channel System.  GRI engineersChris Ell and Seth Reddy, PhD have extensive experience providing PDA testing services and both hold PDA certificates.  Chris and Seth continue their education and experience with PDA testing services and recently completed the rigorous PDA training course and PDA Proficiency examination by GRL Engineers/Pile Dynamics, Inc. in Cleveland, Ohio.

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Southridge High School Community Plaza

Southridge_blog_picA dedication ceremony was held on September 19, 2014, for the new Southridge High School Community Plaza, which honors active military and deceased members of the Southridge and greater Beaverton communities.  The plaza is located on the east side of the Southridge High School football stadium and includes open walkways and low walls etched with the names of recognized members.  The plaza also includes new restrooms, concession facilities, and ticket booths for stadium events.  GRI volunteered design- and construction-phase services for the project.

You can read more about the plaza and the dedication here.  We are pleased to have had the opportunity to provide our services in support of our community and those who serve our country in the military.

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Celebrating 30 Years in Business

30yr_blog_picOn June 19, we gathered with friends and family to show off our modern new Beaverton office and celebrate our 30th anniversary.  We’ve come a long way since 1984 — our original staff of seven has grown to 33 talented and hardworking individuals, and we’ve opened offices in Vancouver, Washington, and Brookings, Oregon.

As we look back on the past 30 years, we gratefully acknowledge our devoted staff and valued clients and look forward to many more years of continued success and partnerships.

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New Digs for GRI Beaverton

b_move2After months of planning and construction, the move is over and we’re finally enjoying our spacious, modern new offices and laboratory on Nimbus Avenue!

Thanks to the tireless guidance of GRI office manager Patty Norgaard, the transition went off without a hitch, and we are up and running just in time to celebrate our 30th anniversary in June.

Our new address is:

9750 SW Nimbus Avenue
Beaverton, OR  97008

Our phone and fax numbers remain the same:

p: 503-641-3478  f: 503-644-8034

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GRI Rocks the 2014 Shamrock Run

Shamrock_blog_picOn March 16th, GRI hit the streets of Portland along with 35,000 participants in the 35th annual Shamrock Run, benefitting the OHSU Doernbecher Children’s Hospital.  Nearly a third of our staff along with friends and family participated in the various events ranging from a 5k walk to 15k run up Terwilliger Boulevard.  The morning started out with a little drizzle, but the clouds soon parted and made for an absolutely perfect day for a run.  After the race, a portion of our team met up for lunch to share our race stories and show off our kilts!

Each of our team members did an awesome job, and we’re happy to help out such a great organization while kicking off the start of the running season.

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GRI’s Newest Principal

Schlechter_web_2We are excited to announce that Scott Schlechter has been promoted to Principal at GRI.

Scott joined GRI in 2000 after completing his Master’s degree in Civil/Geotechnical Engineering at Oregon State University.  Throughout his career, Scott has excelled, quickly becoming recognized as a leader in the field.  In 2011, Scott’s efforts were recognized by the American Society of Civil Engineers’ Oregon Section when he received the Young Engineer of the Year award.  Scott has been active in leadership roles with ASCE and ACEC throughout his professional career and is currently serving on the ASCE Coast Oceans Ports and Rivers Institute national committee.  Scott leads GRI’s earthquake engineering group and has co-authored several papers on seismic design of pile-supported structures in sloping embankments with soft or liquefiable soils.

Scott is a professional engineer in Oregon, Washington, California, Idaho, and Wyoming, and a professional geotechnical engineer in Oregon.  He has completed seismic and geotechnical design studies for many infrastructure projects, including two large campus expansion projects at Oregon Health & Science University, the planned Jordan Cove LNG Terminal in Coos Bay, Oregon, and the Port of Newport International Terminal project in Newport, Oregon, which recently received the American Council of Engineering Companies of Oregon’s 2014 Grand Award for Engineering Excellence.

We are thrilled to have Scott as a part of the GRI family, and proud to offer him this well-earned promotion.

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