Swelling behaviour of expansive clay beds reinforced with encased granular pile anchors
J Ross Publishing Inc
Place of Publication
School of Engineering
Granular pile anchor (GPA) system is a simple and cost-effective foundation technique for resisting the uplift of foundation caused by swelling of expansive clay. This paper presents the heave results obtained from the laboratory-scale studies of the clay beds reinforced with varying number of GPAs (n = 0, 1, 2 and 3) with and without encasement. Tests were also performed by varying the stiffness of the geosynthetic encasement as (15kN/m, 22kN/m and 38kN/m). Heave of expansive clay bed decreased with increase in number of GPAs. Further, for a given number of GPAs (n), heave decreased significantly when encased with geosynthetics and also heave decreased with an increase in the stiffness of the encasement. The results indicate that stiffness of the encasement plays a significant role in the uplift resistance of the granular pile anchors introduced in expansive soils.