TRBâ€™s National Cooperative Highway Research Program (NCHRP) Report 717: Scour at Bridge Foundations on Rock presents a methodology for estimating the time rate of scour and the design scour depth for a bridge founded on rock. The report also includes design and construction guidelines for application of the methodology. [Source: TRB. Image: TRB]
If you have an iPad, you can now read Ground Engineering magazine for free! GE Magazine is one of the industry's most respected trade publications, affiliated with the UK's New Civil Engineer organization. The app is made available thanks to sponsorship from Allu. I've tried it out, and the format is excellent, the text is easy on the eyes, the figures are out of the way, but accessible with just a tap. Even the advertisements are nice, partially interactive but not over the top. Although they call it an app, it shows up on your bookshelf app. You can follow the link to the NCE website below, or jump straight to the GE Magazine App on iTunes if you are reading this on your iPad. [Source: New Civil Engineer. Image: iTunes]
FHWA Director Mendez was on hand last month as WSDOT broke ground on the SR 99 tunnel, also known as the Alaskan Way Viaduct Replacement Tunnel. The project is expected to cost upwards of $2B and be completed in 2015. [Source: Roads And Bridges via ASCE SmartBrief. Image: WSDOT]
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 430: Cost-Effective and Sustainable Road Slope Stabilization and Erosion Control presents information on cost-effective and sustainable road slope stabilization techniques, with a focus on shallow or near-surface slope stabilization and related erosion control methods used on low-volume roads.
The report address topic planning, site investigation, erosion control techniques, soil bioengineering and biotechnical techniques, mechanical stabilization, and earthwork techniques. [Source: TRB. Image: TRB]
The Bentley gINT team has put together a gINT Rules add-in that will help you write your own gINT Rules code. The Add-In is gra005 (note the 'a') found on the Bentley Geotechnical Wiki. It will prompt you with a series of dialog boxes to guide you through the process of setting up a gINT rules procedures, then it will create the code skeleton for you. There are also several videos that will give you an overview of how the add-in works. These videos are:
TRBâ€™s National Cooperative Highway Research Program (NCHRP) Synthesis 429: Geotechnical Information Practices in Design-Build Projects addresses how states use geotechnical information in solicitation documents and contracts for design-build highway projects.
The report examines current practices regarding the allocation of geotechnical risk and the level of geotechnical information provided with bid documents, the scope of geotechnical information required after contract award, geotechnical-related performance testing during construction, and contract provisions related to geotechnical design and construction. [Source: TRB. Image: TRB]
This fall, TRB will release Rockfall: Characterization and Control, which will address rockfall hazard identification and evaluation, investigation process, mitigation options, and maintenance and management programs.
The 400 page publication will include a DVD with video clips of rockfall field tests and several historical movies documenting rockfall field activities.
Because of the expected high demand for this report, TRB is taking advance pre-publication orders. Shipping costs will be waived for all orders received prior to October 1, 2012. Click the link below for ordering info. [Source: TRB. Image: TRB]
Text from TRB: TRBâ€™s National Cooperative Highway Research Program (NCHRP) Web-Only Document 187: Seismic Design of Geosynthetic-Reinforced Soil Bridge Abutments with Modular Block Facing explores design methods and construction guidelines for using geosynthetic-reinforced soil (GRS) systems in bridge abutments in seismically active regions. [Source: TRB. Image: TRB]
A new synthesis report by the NCHRP aims to identify the current state of the practice in site-specific earthquake design.
TRBâ€™s National Cooperative Highway Research Program (NCHRP) Synthesis 428: Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions identifies and describes current practice and available methods for evaluating the influence of local ground conditions on earthquake design ground motions on a site-specific basis. The report focuses on evaluating the response of soil deposits to strong ground shaking.
A 2004 paper by J.P. Giroud and Jie Han provides a practical design method for geosynthetic-reinforced unpaved roads. The method outlined in the paper was very detailed, and the authors wanted to provide a summary for the benefit of practitioners who wish to use the method. Additionally, some equations in the paper are generic and some have been calibrated for specific geosynthetics (the Tensar BX1100 and BX1200 biaxial geogrids, with new work by another author applying to Tensar’s Triax geogrid) and some practitioners were not clear on this matter. Finally, the authors stress the need for calibration of the method when using other geosynthetics. These three issues were addressed by a 2-part series in Geosynthetics Magazine by Giroud and Han. You can read the first part and the second part at GeosyntheticsMagazine.com. [Image from Geosynthetics Magazine]