Earth Mechanics, Inc.

Engineering resilience for a safer future

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About the firm

Earth Mechanics, Inc. is a California-based geotechnical and earthquake engineering practice founded in 1989, specializing in transportation infrastructure. With over 36 years of practice, it holds the record for providing geotechnical and foundation design services for the seismic retrofitting of more than 1,000 bridges in California, including seven of the nine state-owned toll bridges. Operating four offices across California, it maintains an extensive library of more than 100 technical publications in soil mechanics, seismology, and soil-structure interaction.

Established
1989
Team
Small
Firm type
Geotechnical Engineering · Transportation Engineering

People

Alahesh ThurairajahPresident and Principal

Raj VaratharajVice President and Principal

Denise CasadTreasurer and Principal

Eric BrownSecretary and Principal

Kandiah (Arul) ArulmoliDirector and Principal

Lino CheangCo-Founder and Senior Consultant

Mike KapuskarPrincipal Engineer

Andrew KorkosPrincipal Engineer

Hubert LawPrincipal Engineer

Amir ZandSenior Engineer

Andrew LeePrincipal Engineer

Capabilities

Geomechanical & Seismology

Service website

Integrated geomechanics and seismology practice, contributing to government reports, technical papers, and industry standards for infrastructure projects.

  • Soil Mechanics

    Analyzing soil behavior under stress and strain to determine physical properties for foundation stability.

  • Rock Mechanics

    Evaluating rock masses and joints to design safe slopes, excavations, and tunnel supports.

  • Earthquake Engineering

    Analyzing structural responses to seismic events and designing mitigation strategies for ground shaking.

Geotechnical Site Investigation

Service website

Conducting site characterization utilizing engineers, geologists, and technicians to deliver data tailored to specific project requirements.

  • Soil Investigation

    Field drilling, sampling, and in-situ testing to characterize subsurface soil profiles.

  • Rock Investigation

    Core drilling and structural logging of rock formations to determine rock mass characteristics.

Soil Infiltration Testing & Groundwater Monitoring

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Specializing in Better Management Practice (BMP) studies for stormwater management, working closely with Caltrans on site screenings at more than 200 freeway locations along the California coast.

Soils & Rock Laboratory Testing

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Operating in-house soil and rock mechanics laboratories, providing comprehensive testing services for geotechnical projects.

Ground Motion & Seismic Hazard Evaluation

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Developing design ground motions for major infrastructure projects, following state-of-the-art procedures and contributing to the evolution of seismic analysis methods.

Geotechnical Analysis & Foundation Design

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Work in this area is organized into supported delivery tasks.

  • Providing Analytical

    Support includes Providing analytical.

  • Design Services For Transportation

    Support includes design services for transportation.

  • Waterfront Infrastructure

    Support includes waterfront infrastructure.

  • Bridges

    Support includes bridges.

  • Freeways

    Support includes freeways.

  • Roadways

    Support includes roadways.

  • Port Facilities

    Support includes port facilities.

Soil-Structure Interaction

Service website

Specialized analysis for complex structures such as long-span bridges, port facilities, and tunnels to evaluate the coupled behavior of soils and foundations.

Numerical Modeling

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Applying finite element analysis and advanced analytical modeling to deliver safe, cost-effective solutions for challenging subsurface conditions.

Pavement Design

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Conducting field investigations to obtain essential soil properties and providing tailored recommendations for both rigid and flexible pavement sections.

Technical Review

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Providing expert independent review services for major public works projects locally and internationally.

Construction Support

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Providing expert monitoring and support during the construction phases of infrastructure projects.

  • Pile Driving Monitoring

    Real-time logging and analysis of driven pile installations for foundation verification.

  • CIDH Concrete Pour Monitoring

    Inspection and monitoring of Cast-in-Drilled-Hole concrete placement for deep foundations.

  • Ground Improvement Installation

    Quality assurance and monitoring of soil stabilization and ground reinforcement processes.

Site Grading, Ground Improvement, and Pile Foundation Specifications

Service website

Developing detailed earthwork and foundation specifications in accordance with Caltrans, Port Standards, and Greenbook requirements.

  • Site Grading Specifications

    Guidelines for excavation, backfilling, and structural fill placement.

  • Ground Improvement Specifications

    Technical requirements for soil reinforcement, grouting, and consolidation.

  • Pile Foundation Specifications

    Detailed engineering criteria for driven and drilled pile installations.

Industries

Infrastructure · Transportation · Rail · Transit · Marine · Ports & Harbors · Tunnels · Government · Water Resources

Projects

POLA Everport Project (Berth 226-236)

Los Angeles, CA · Ports & Harbors · 2022 · Client: Port of Los Angeles

Project details

Container wharf upgrade at Port of Los Angeles. ASCE LA Metro Branch Port and Airport Project and LA Section Project of the Year 2022. Sub to Moffatt & Nichol.

Gilman Road Bridge (La Jolla)

La Jolla, CA · Transportation · 2021

Project details

ACEC California Honor Award for Engineering Excellence 2021. Sub to Moffatt & Nichol.

Devils Slide Tunnels

San Mateo County, CA · Tunnels · 2013 · Client: Caltrans

Project details

OC Engineering Council Project Achievement Award 2013. Geotechnical services for Caltrans tunnel project.