Heave Studies on Expansive Clay Beds Reinforced with Granular Pile Anchors and Geogrid-Encased Granular Pile Anchors

Sai Raghuram, Ammavajjala Sesha and Phanikumar, B. R. and Purnanandam, K. and Sekar, Preethi and Sriramarao, A. (2020) Heave Studies on Expansive Clay Beds Reinforced with Granular Pile Anchors and Geogrid-Encased Granular Pile Anchors. In: Advances in Geotechnical and Transportation Engineering. Springer, pp. 179-191.

Full text not available from this repository. (Request a copy)

Abstract

This paper presents heave studies on expansive clay beds reinforced with granular pile anchors (GPAs) and GPAs encased with geogrid by conducting experiments on CBR (small) and fabricated (large moulds of size 381 × 381 × 457 mm) moulds. The technique of GPA was developed for reducing heave and improving load-carrying capacities of expansive clay beds. In the current study, GPAs were encased in geogrid cylinders in a separate series of tests to further decrease heave. Heave tests were conducted in small and large test moulds to study the heave of expansive clay beds reinforced with plain GPAs and GPAs encased with geogrid. Heave decreased by about 92.5% and 98.3%, respectively, when determined in small and large moulds in the case of geogrid-encased GPAs. In addition, time required for the development of equilibrium heave decreased significantly upon installation of GPAs. The unreinforced expansive clay bed required, respectively, 3600 and 10,080 min of continuous wetting to attain the equilibrium heave in small and large moulds. However, in the case of clay beds reinforced with GPAs, less time was required for equilibrium heave. Furthermore, as the length of the GPA increased, the time required for equilibrium heave further decreased. © 2020, Springer Nature Singapore Pte Ltd.

[error in script]

IITH Creators: