Applications of Geosynthetics in Highway Pavement
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Date
2019-06-19T10:40:35Z
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Abstract
Weak subgrades are a common problem in road construction. Whether it is a temporary access road or a
permanent road built over a weak subgrade, a large deformation of the subgrade can lead to deterioration
of the paved or unpaved surface. Ground movements caused by swelling /shrinkage of expansive clays
poses a threat to any structure resting on such clays. The performance of paved and unpaved road
pavements constructed over such expansive soil subgrades is often poor and shows cracking, rutting and
differential settlements/ heaving at various locations. Geosynthetics help to distribute the loads more
efficiently and increase the effective bearing capacity of the subgrade, hence providing a better
alternative to costly conventional stabilization methods. In this study an attempt has been made to
stabilize the soil by introducing a single layer biaxial geogrid. Geogrid has been placed in different
location and CBR test was carried out to analyze the effect of reinforcing layer and its position on CBR
value of the soil. The obtained results showed that there was an increase in CBR with the introduction of
geo grid reinforcement in layers and optimum position obtained from the study. From the study it has
concluded that increase in number of layers increases the strength of subgrade soil and it can be
considered as one of the techniques of Ground improvement by means of reinforcements.
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JAVED ALI, RAJ DOMADIYA, AKHILESH SHETKAR, MOHAN NAIK, 1NH15CV044, 1NH15CV094, 1NH15CV012, 1NH15CV072