“The escalating cost of steel from our suppliers is the main reason for this price increase,” said Steve Spanagel, President of CONTECH Sales. [Source: CONTECH]
Two new standards from the Geosynthetics committee of ASTM will help define properties that can be used in the design of geosynthetic reinforced pavement. I know in my practice in Arizona, ADOT simply allows a […]
Ground penetrating radar (GPR) imaging of the subsurface tied to GPS mapping will allow the CH2M Hill Plateau Remediation Company to have a better idea of what is buried at the site before excavating for […]
A crane using a pile driver to install new foundations for the Barnette Street Bridge project. A DOT (City of Fairbanks?) spokesman speculated that the crane overextended itself while installing piles about 40-ft away. The […]
ODOT’s I-5: Iowa Street Viaduct Replacement Project in Portland will reportedly cut into 6 ancient landslide surfaces according to a PSU Geology Professor. The existing bridge structure is over 50-years old and deteriorating and will […]
Here we go again, revised and reapproved ASTM standards that might be of interest to geopractitioners (to borrow a term from Ed Medley). In June, some of the noteworthy standards were D6938 – In place density and moisture using the nuclear gauge, electric cone penetrometer testing for environmental site characterization, standard practice for placement and assembly of gabions and revetment mats and standard practice for decontamination of field equipment at low level radioactive waste sites…sign me up! Click through for standards updated or otherwise revised in June of 2010.
A federal judge in Seattle dismissed a lawsuit Friday aimed at stopping construction of a tunnel replacement for the Alaskan Way Viaduct. Judge John Coughenour said the people who brought the suit in September hadn’t […]
The Corps is proposing to use the fly ash as part of a lime slurry mixture for some kind of grouting to stabilize the levees according to the article. Environmentalists are concerned about the potential […]
The FHWA has released for download a comprehensive update to the 1999 O’Neil and Reese manual “Drilled Shafts: Construction Procedures and Design Methods”, lovingly referred to in the industry as the “Brown Book” or the “Drilled Shaft Bible”. This 2010 manual from the National Highway Institute (NHI) of the FHWA is entitled “Drilled Shafts: Construction Procedures Procedures and LRFD Design Methods” and was authored by Dan A. Brown, Ph.D, P.E. of Dan Brown and Associates, John P. Turner, Ph.D, P.E. of the University of Wyoming, and Raymond J. Castelli, P.E. From an FHWA Memo on the manual:
Distributed with this memorandum is the publication entitled "Drilled Shafts: Construction Procedures and LRFD Design Methods" (FHWA-NHI-10-016). This manual is the reference text used for the National Highway Institute (NHI) course numbered 132014 on Drilled Shafts. The publication will become the tenth in the series of geotechnical engineering guidelines called "Geotechnical Engineering Circulars." Geotechnical Engineering Circular (GEC) No. 10 is prepared as a significant revision and update to "Drilled Shafts: Construction Procedures and Design Methods" (FHWA IF-99-025), and reflects the standard of practice for the design, construction and inspection of these features. The guidance is developed following Load and Resistance Factor Design (LRFD) procedures and will enable engineers to identify and evaluate technical feasibility and potential applications. The text is developed with a sufficiently broad scope to be of value to a wide range of transportation specialists responsible for assisting with selection, design, development of materials specifications, construction monitoring, and contracting methods for Drilled Shafts.
Click through for the download link and some preliminary comments on what has been updated in this significant new publication in the drilled shaft construction industry as well as the geotechnical engineering profession.
Bruce Herbert, assistant head of the Department of Geology and Geophysics at Texas A&M, says reports that as much as $1 trillion worth of minerals may lie in Afghan soils are really not surprising. U.S. […]
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