Strata expedites foundation stabilisation for a vital highway link
Baharampore-Farakka
Section of NH-34, West Bengal, India
The subsoil was
essentially weak, and ground water table was almost at ground level. Stability
analysis indicated a safety factor lower than the norm of 1.3. Owing to the
high ground water along with the weak soil, soil replacement was not a feasible
solution. Ground improvement methods proved to be prohibitively heavy on
project schedules and costs.
To ensure stability of
the structure notwithstanding weak subsoil conditions, Strata recommended basal
reinforcement along the entire base of the reinforced soil structure system.
The solution included StrataGridTM SGB geogrid and StrataWeb® geocells to ensure
stability of the entire reinforced soil system with a safety factor higher than
the norm.
The basal reinforcement
system adopted comprised of a layer of StrataGrid™ SGB biaxial geogrid,
underlain by two layers of StrataWeb® load bearing geocells for heights beyond
10m, and a single layer for heights below 10m.
The design was approved
by Indian Institute of Technology, Madras.
Strata’s creative
solution provided a safe, easy, rapid, and economical solution. The confining
cellular system of StrataWeb® also facilitated use of pond ash. This further
reduced the cost of construction. Strata’s unique design was approved to be one
of the most effective solutions for construction of high reinforced soil
structures on weak soils.
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12-2025
