Abhishek, S V and M R, Madhav
(2013)
Embankments on soft ground: an overview.
In: Foundation and Soft Ground Engineering Conference Thu Dau Mot University ICTDMU - 1, 5-6, June 2013, Binh Duong.
Abstract
Thick
deposits of soft ground such as soft marine and estuarine clay are widespread
throughout the world especially along deltas and coastal regions. Such soils possess poor geotechnical
properties such as high natural moisture content (close
to liquid limit), high compressibility & low shear
strength. Embankments on such soft ground commonly adopted for the construction of highways, rai
l-
ways and airport runways are often affected by edge stability and long term settlement. The earliest
meth
od or technique employed for stable construction of embankments on soft ground was the use of ve
r-
tical drains combined with stage construction. However, with growing demand for rapid construction and
associated difficulty in meeting the project deadline,
column
-
supported embankments have emerged as an
appropriate technical solution. In addition, geosynthetics in the form of basal reinforcement are exte
n-
sively being used at present for embankments on soft ground, to improve the bearing capacity, reduce di
f-
ferential settlement and prevent slope instability. A broad over
-
view of embankments on soft ground is
presented
in the present paper. The review is complemented by six well documented case histories of
embankments constructed over soft ground using diff
erent geotechnical techniques. The case histories
presented could help the geotechnical community to understand and evaluate the benefits of the tec
h-
niques for their adoption for the construction of embankments over soft ground.
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