2016-17

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Browsing 2016-17 by Author "Fazil, Ahammed"

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    Influence of Geofrid and It's Position on Strength of Weak Subgrade Soil
    (2017-08-16T10:54:27Z) Drakshayini, N; Fazil, Ahammed; Haritha, M
    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 black cotton soil by introducing a single layer biaxial geogrid. Geogrid has been placed in different location and CBR test was carried out to analyse the effect of reinforcing layer and its position on CBR value of the soil. The obtained results showed that there was an increase in UCS and 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 technique of Ground improvement by means of reinforcements