Science, United States
Science, United States

Time filter

Source Type

Swaminathan “Vasan” Srinivasan has been elevated to president of Terracon Consultants Inc. from chief operating officer. In the new role, Srinivasan succeeds David Gaboury, who continues as chairman and CEO. An environmental and geotechnical consultant, Terracon ranks at No. 30 on ENR’s list of the Top 500 Design Firms, with $602 million in revenue and 3,500 employees. Vanderbilt University, Nashville, has re­appointed Philippe Fauchet to a second five-year term as dean of its school of engineering, beginning on July 1. The school says undergraduate enrollment rose 15% since 2012, and graduate enrollment is up 11%. It had about 2,000 students enrolled as of fall 2015, says its website; about 30% of undergraduates are women. The school also says it is experiencing “negative attrition,” contending that more students are earning undergraduate engineering degrees than the cohort that declared the major as freshmen. U.K.-based contractor Laing O’Rourke plc has named Sir John Parker chairman, effective later this year. He is set to succeed firm founder Ray O’Rourke, who remains CEO. Parker is former president of the Royal Academy of Engineering and a visiting fellow at Oxford University. He also held senior roles in several business sectors, including chairman of global mining firm Anglo-American plc, which he left in February. Richard McKinney has joined AECOM as vice president of IT strategy in its management services group’s systems engineering and information solutions business. He had been chief information officer of the U.S. Transportation Dept. and a senior adviser to the secretary of transportation on IT issues.

News Article | May 3, 2017

"I am humbled by this appointment and the opportunity to serve the North East Division. I am also very excited by the possibilities for profitable growth of the Division and for its continued focus on the safety of our employees," Patel said. Prior to joining Terracon, Patel held management positions with firms specializing in professional infrastructure and environmental services. He holds a bachelor of science degree in geology from the University of Delaware, and has more than 30 years experience in the field. He is a registered professional geologist in Pennsylvania. Terracon is an employee-owned engineering consulting firm with more than 4,000 employees providing environmental, facilities, geotechnical, and materials services from more than 140 offices with services available in all 50 states. Terracon currently ranks 30th on Engineering News-Record's list of Top 500 Design Firms. For additional information about Terracon, please visit To view the original version on PR Newswire, visit:

News Article | April 20, 2017

"Terracon is focused on growth as evidenced by our internal expansion and acquisition activities," said Gayle Packer, Terracon's chief administrative officer. "Our strategic plan guides us to continue growing at a rate of 10-15 percent each year, and we expect that the employment base at our corporate office will increase accordingly." Olathe has been home to Terracon for more than 10 years. Since 2007, the company has grown from $335 million in revenue to more than $580 million. The announcement follows Terracon's acquisition of five smaller firms on both coasts in2016. Terracon credits a successful partnership with the City of Olathe and the engagement of city officials in helping make the new building possible. "This investment represents the passionate commitment of our employee-owners to progress our growth," said Swaminathan Srinivasan, who was named as Terracon's new president earlier this year. "Inspired by new surroundings, we will focus our future on serving clients in new, innovative ways and seeking out opportunities to make positive impacts on the communities where we live and work." The property is owned and will be developed by a design-build team led by VanTrust Real Estate. The office will emphasize collaborative spaces including a new training conference center and expanded amenities. The new building is scheduled for completion in the first quarter of 2018. Terracon is an employee-owned engineering consulting firm with more than 4,000 employees providing environmental, facilities, geotechnical, and materials services from more than 140 offices serving all 50 states. Terracon currently ranks 32nd on Engineering News-Record's list of Top 500 Design Firms. For more information, visit To view the original version on PR Newswire, visit:

Wu T.H.,Ohio State University | Gale S.M.,01 Twelve Oaks Center Dr | Zhou S.Z.,Terracon | Geiger E.C.,Office of Geotech. Engineering
Journal of Geotechnical and Geoenvironmental Engineering | Year: 2011

A geotextile-reinforced embankment was built over soft ground. Staged construction and vertical prefabricated drains were used to obtain strength gain via consolidation of the foundation material. Settlement and pore pressure were measured as a part of construction control. Settlement, differential settlement, and rate of consolidation were predicted by simple models. Uncertainties in the predictions were evaluated to assess the reliability of the predictions. The estimated errors were compared with the measured values, and major contributors to prediction errors were identified. © 2011 American Society of Civil Engineers.

Shu S.,Terracon | Muhunthan B.,Washington State University | Li X.S.,Hong Kong University of Science and Technology
International Journal of Geomechanics | Year: 2011

This paper presents a state-dependent constitutive model for sand formulated within the critical-state framework and its implementation into a numerical analysis (FLAC3D) program. The implemented model was verified by using drained triaxial results on sands. The proposed model is shown to capture the stress path dependent behavior of sand over a wide range of densities and confining pressures well based on a unique set of parameters. Numerical simulations of the behavior of a micropile under vertical loading shows that the side and tip resistance, and thus the total resistance of the pile, are functions of the "in situ state" of soil as defined by the state parameter ψ=e-ec in which e is the void ratio and ec the void ratio at the critical state. © 2011 American Society of Civil Engineers.

Zhang Y.,Terracon | Michalowski R.L.,University of Michigan
Journal of Geotechnical and Geoenvironmental Engineering | Year: 2015

Frost heave and thaw settlement are the cause of substantial damage to infrastructure in regions of seasonal freezing as well as seasonal thawing (permafrost). While frost heaving of soils has been researched for decades, less attention has been paid to quantitative estimates of settlement and loss of strength of soils due to thawing. A constitutive model is developed, capable of simulating freezing and thawing of soils, and associated changes in the soil strength. While the porosity growth parameters describing frost heaving have been calibrated and validated for a specific soil, the description of the thawing phase has not been validated due to a lack of experimental data. The yielding of the frozen soil is described using the critical state concept, with the pore ice content being an important parameter affecting the yield function. The model was calibrated using available laboratory test data and used in the simulation of a freezing-thawing cycle in the soil with embedded footing. © 2015 American Society of Civil Engineers.

Zein A.S.,Terracon | Gassman S.L.,University of South Carolina
Journal of Bridge Engineering | Year: 2010

Numerical and experimental studies were performed to assess the transient impact response of 11 T-beams with various dimensions and aspect ratios. Numerical modeling was performed using a three stage finite-element modeling procedure which included modal analysis, resonant analysis, and three-dimensional transient dynamic analysis. The response at impact locations on both the top centerline of the flange and the bottom centerline of the web was investigated. Physical models of three of the beams were constructed in the laboratory to determine the physical response of the beams when subjected to a transient impact and to verify the numerical results. Relationships between the fundamental frequencies and the frequencies of higher cross-sectional modes of vibration were established for the various aspect ratios. Shape factors were derived from the numerical and experimental results. The practical significance of the results is demonstrated for a project where impact-echo testing was used to nondestructively assess the condition of a decommissioned concrete T-shaped girder. © 2010 ASCE.

Terracon | Date: 2015-09-28

Methods and systems for optimizing pile design based on pile driver data are provided. A pile driving performance monitoring (PDPM) system captures pile driver data for a pile in an identified location using a pile driver data capture device. The pile driver data comprises a pile penetration depth and pile penetration rate based on percussive hammer. The identified location can be determined using a global positioning system. A parsing program component analyzes the pile driver data for the pile. The parsing program component determines whether the pile driver data of the pile meets an anticipated-pile driving criteria, the anticipated-pile driving criteria comprises a test pile driver data that correlates with a predefined capacity for a pile in the identified location. The pile is added to an acceptance report when it meets the anticipated-pile driving criteria or added to exception report when it does not meet the anticipated-pile driving criteria.

News Article | November 3, 2016

OLATHE, Kan., Nov. 3, 2016 /PRNewswire/ -- Terracon, a leading provider of environmental, facilities, geotechnical, and materials services, announces the establishment of its first Virginia office locations through the acquisition of Geotechnical Consulting & Testing Inc. (GC&T),...

News Article | December 6, 2016

OLATHE, Kan., Dec. 6, 2016 /PRNewswire/ -- Terracon, a leading provider of environmental, facilities, geotechnical, and materials services, announces the acquisition of CHJ Consultants (CHJ). CHJ provides geotechnical and materials testing services from its three southern California...

Loading Terracon collaborators
Loading Terracon collaborators