Nichols Environmental contacted Layfield to explore an alternative method for reinforcing a 16,000m3 diesel tank foundation. Nichols Environmental had been hired by the EPC engineer, VTEK Consultants to provide the geotechnical overview for the tank foundation and provide VTEK Consultants with some foundation options. Nichols Environmental suggested a few traditional options including a concrete foundation, steel ‘H’ piles and helical screws. After discussing these options with VTEK, Nichols Environmental was asked to look at more cost effective approaches including looking into reinforced soil foundation options.
Nichols Environmental started looking into geosynthetic options and contacted Layfield Canada to explore the geosynthetic options available. After discussion with representatives with the manufacturer, TenCate Mirafi, analysis into a RSF design was conducted. Using settlement calculations and a bearing capacity analysis, TenCate came up with a design sent to Nichols Environmental for review. Upon final discussion between Nichols Environmental, TenCate, VTEK and Layfield, a final design using 8 layers of the Mirafi RS580i integrated geotextile using 80mm minus pit-run and the layers spaced at 375mm.
This design had considerable savings over the traditional solutions of concrete piles, steel piles or helical screws. Voice Construction, having been familiar with the Mirafi RSi integrated geotextiles in the past, had an easy time with the install and Nichols Environmental and VTEK Consultants were very pleased to deliver the owner a cost effective solution for this project. In recent weeks, the tank has been tested by being filled with water to test for settlement and the RS580i has passed all tests.