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State-of-the-art fuel storage facility at Point Loma

August 1, 2016

Refueling the life span: Effective secondary containment system Introduction In 2008, an eight-year military construction project was approved to replace the aging Point Loma Navy fuel storage facility that had been intermittently constructed between 1917 and 1954. Located at Defense Fuel Support Point (DFSP) Point Loma, San Diego, this was the largest construction project ever …

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Questions and answers from the GMA Techline

Geosynthetic filter failure Q: I am interested in your upcoming webinar on geosynthetic filters and was hoping to get a little clarification on the content. I’m most interested in how geotextile fabrics are used with riprap but I also understand these fabrics are perhaps more commonly associated with roadway construction. How much does this webinar …

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Recycled materials reinforcement?

June 1, 2016

Questions and answers from the GMA Techline We are soliciting information on the use of recycled materials in the reinforced zone of MSE walls. I recall you as the keeper of many case histories. Do you have any success or failure stories about such recycled content in a reinforced zone? I’m mindful of chemical attack …

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Weld or sew?

Questions and answers from the GMA Techline We have a liner contractor who would like to wedge-weld geotextile rather than sew it. The material is simply a cushion layer below the 40-mil geomembrane and the contractor is concerned the sewn seams will affect wedge welding of the above geomembrane. Do you have a recommendation on …

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Geosynthetics: The science that makes green roofs work

Green roofs 101­–From bottom to top Introduction Most green roofs use a variety of geosynthetic materials to support healthy and sustainable installations. Geosynthetics contribute in many ways to the operational success and long-term sustainability of green roof systems. Because they are lightweight, they reduce green roofs’ structural loading on buildings and also reduce the energy …

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Strength test?

Questions and answers from the GMA Techline Something that has always puzzled me while performing the CQA for liners is the strength test for a weld using the extrusion gun. I always thought that if the weld does not pass for elongation, that has more to do with the sheet than how well the weld …

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Environmental applications of geosynthetics in pipeline installations

Geo + Pipeline 101 Geosynthetics often play an important role on the environmental side of pipeline installations. During construction, actions must be taken to protect water quality, stabilize soil, and prevent soil erosion. Pipeline right-of-ways traverse many different types of landscapes, passing through sensitive resource areas such as streams and wetlands. Geosynthetics are used in …

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Part 3: Field evaluation of the performance of unpaved roads incorporating geosynthetics—Implementation

Introduction The mechanisms that govern unpaved road performance are complex, and accurate field evaluation of the performance of unpaved roads incorporating geosynthetics is not easy because it involves many influence factors. Interpretation of test data can be correct only if there is a good understanding of the mechanisms (which was the purpose of the Part …

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Three of the most difficult questions

From the GMA Techline Q-and-A 1. Mold inside drainage layer? Q: Recently there has been a greater demand for sustainable projects in Southern California and I was glad to see published in Geosynthetics magazine “Geosynthetics: The science that makes green roofs work” (June/July 2014, Vol. 32, No. 3). I am curious if there are any …

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Reinforced soil slope design and construction

Harold Court East Regional Service Center in Austin, Texas Introduction The Harold Court East Regional Service Center in Austin, Texas, is a city-owned multi-purpose facility used primarily for material storage. The erosion control and other issues at this site included: periodic movement of the embankments on the western and southern boundaries of this property. the …