Twining Infrastructure

Geotechnical Engineering

Twining's geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project.

Geotechnical Investigation

Our experts develop geotechnical investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include small- and large-diameter borings, cone penetration testing, down-hole logging, installation of monitoring wells, and trenching for geological/seismological hazards and fault investigations.

Our comprehensive in-house laboratories are completely certified and capable of performing all routine tests including moisture and density, Atterberg limits, sieve analysis, direct shear, consolidation and R-value.

The data obtained from field investigation and laboratory testing is evaluated by our engineers and used to determine time- and cost-saving methods of construction. These methods may include reusing onsite material, innovative foundation designs and realistic construction techniques.

Geotechnical Analysis and Design

Our engineers have extensive experience performing geotechnical analysis and providing design recommendations to meet the needs of wide range of critical public works and infrastructure projects. Specific analytical and design capabilities include:

• Foundation design including bearing capacity and settlement evaluation
• Slope stability analysis
• Permanent and temporary earth retaining structures
• Seismic analysis including liquefaction and seismic settlement
• Seismic ground response analysis
• Ground improvement
• Advanced analytical methods such as finite element analysis

Geotechnical Observation and Testing During Construction

Geotechnical construction observation is an integral part of any project as it ensures adherence to the geotechnical design recommendations and project specifications. Once construction on a project begins, our team of highly qualified field technicians can provide geotechnical observation and testing during all relevant activities. Our engineers understand the importance of communication during construction and work closely with our technicians to provide seamless testing and engineering services. Our in-house laboratories ensure quick turnaround and allow our staff to provide closely monitored quality control at all times. We also have extensive experience meeting the special needs of stringent agencies such as the Federal Aviation Administration, Caltrans, Army Corps of Engineers and other public agencies and municipalities.

Our highly qualified team of engineers has in-depth knowledge and years of experience related to critical geotechnical issues. Brian C. Kramer, R.C.E, G.E., the firm’s President and Principal Engineer, is a registered civil and geotechnical engineer. Geotechnical Department Manager Paul C. Soltis, R.C.E., G.E., holds a master’s degree from the University of Colorado. In addition, Principal Engineering Geologist Richard S. Hazen, R.G., C.E.G., holds degrees from Stanford and UCLA and has over twenty years experience as a geologist in California. These gentlemen oversee the geotechnical functions of the firm and are supported by three additional registered geotechnical engineers along with registered civil engineers, geologists and certified technicians.