Geosynthetics August/September 2019 - 31
in soft areas and 12 inches of sand with
a separation geotextile between the sand
and the subgrade. The proposed treatment replaced the sand and separation
fabric with two layers of geogrid and 24
inches (610 mm) of No. 2 stone. This
required only an additional 12 inches of
excavation. The MSL solution successfully
addressed the issues related to unsuitable soils on the project and allowed construction to proceed on the toll lanes.
The contractor was able to maintain the
project schedule while addressing the site
conditions, and the cost was significantly
lower than would have been the case with
the conventional solution of excavation,
disposal and replacement.
Acknowledgments
The authors gratefully acknowledge the
cooperation of MDTA, Tutor Perini Corp.
and RK&K in developing and implementing the solution for this project, and look
forward to continued success on future
phases of the job.
FIGURE 3 First lift of aggregate on geogrid
References
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Giroud, J. P. (2009). Calibration of the Giroud & Han
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Giroud, J. P., and Han, J. (2004a). "Design method
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FIGURE 4 Upper layer of geogrid and geotextile
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Geosynthetics August/September 2019
Table of Contents for the Digital Edition of Geosynthetics August/September 2019
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Geosynthetics August/September 2019 - Cover2
Geosynthetics August/September 2019 - 1
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