Geosynthetics magazine offers free sponsored webinar on natural facings for steep slopes and walls

October 24, 2018

Geosynthetics magazine will present the Tensar Corp.-sponsored webinar “Natural Facings for Better Performance and Value on Very Steep Slopes and Walls” on November 8 at 1:00 p.m. EST. This presentation will provide a case study example of how natural facings provide better performance and value on very steep slopes and walls. Steve Luptak, national product …

Construction inspection of MSE walls, berms and slopes is focus of GSI online course

September 27, 2018

The Geosynthetic Institute (GSI) will host an online short course entitled “Course 2: Construction Inspection of Mechanically Stabilized Earth (MSE) Walls, Berms and Slopes,” Nov. 6–8, from 11 a.m. to 12:30 p.m. and from 2 p.m. to 3:30 p.m. EDT each day. Robert M. Koerner and George Koerner will teach the course. All Geosynthetic Materials …

Part 2: New design models for MSE walls and slopes

June 1, 2017

Introduction The design of many geotechnical structures is based on limit-state conditions. For example, in designing gravity walls, the load exerted by the retained soil on the wall is based on an assumed active state of stresses. That is, the wall moves sufficiently outward, enabling the retained soil to mobilize its shear strength along a …

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Pioneer Mountains Scenic Byway frost heave prevention and results

April 1, 2016

Abstract The Pioneer Mountains Scenic Byway, located about 30 miles (48km) west of Dillon, Mont., seasonally experiences frost heave problems over a 20-mile (30-km) stretch of road. The road is closed to winter traffic and typically re-opens in May. Longitudinal full-section depth cracks form during the spring thaw. One location, in the high alpine meadows …

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Bridge building in Maine with GRS (geosynthetic-reinforced soil)

The challenge In 2013, the small town of North Haven on North Haven Island off the coast of Maine, began construction on a unique bridge project. The goal was to rebuild Beach Bridge, a deteriorating structure that provided access to a handful of seasonal homes and an important wharf for local lobstering as well as …

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Part 1 Durability of geosynthetics: The basics

August 1, 2015

By John H. Greenwood Author’s note This article is based on a training presentation delivered on Sept. 24, 2014, at the 10th International Conference on Geosynthetics in Berlin, Germany. That talk was itself based on courses given at ERA Technology, Leatherhead, U.K., with Alan Friday, and later at SKZ in Würzburg, Germany, with the participation …

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Instrumented MSE wall reinforced with polyester straps

Emerging technology Introduction Mechanically stabilized earth (MSE) walls with large concrete panel facing, reinforced with polyester straps, is an emerging technology in the U.S. To enable the design of this wall system using AASHTO’s methodology, its classification of extensibility must be established. This empirical classification results in adequate internal stability. Internal design of MSE walls …

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Geosynthetic reinforcement solutions for Lake Tahoe highway

February 1, 2014

By Katie Westfall Introduction U.S. Highway 50 crosses the central portion of Nevada through several large desert valleys, basins, and mountain passes. The road climbs steep 8% grades and carries travelers around hairpin turns and through pine forests. In some places, erosion of the slopes adjacent to the highway is a problem for motorists who …

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California dam expansion using geosynthetic-strip reinforced MSE wall

August 1, 2013

By Fransiscus S. Hardianto, Robert Lozano, John E. Sankey, and David K. Hughes Introduction The Los Vaqueros Dam was originally built in 1997, creating the Los Vaqueros Reservoir, to improve the quality and reliability of water available to the Contra Costa Water District (CCWD) in Northern California. In 2011, the CCWD expanded the reservoir from …

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Geofoam solution for underground coal mine tunnel

By Terry Meier About 30 miles east of Salina, Utah, nestled in the western bituminous region of Sevier County, is Convulsion Canyon (Photo 1). This is home for a productive Southern Utah Fuel Co. (SUFCO) underground coal mine, where a longwall mining system and continuous miner units extract more than 6 million tons of coal …