Vol. 4 Issue 3
Year: 2014
Issue: Jun-Aug
Title:Granular Pile Anchors For Soft Soils
Author Name:Eswara Reddy.O, Madhav.M.R , Saibaba Reddy.E and Vidyaranya Bandi
Synopsis:
Soft soils need to be improved to make them suitable for construction. Granular Piles (GP) are effective and economical solutions to improve the behavior of the soft soil by increasing bearing capacity, reducing settlements due to reinforcement. Granular piles due to their inherent advantage are effective in countering swell pressures from expansive clays. Installation process of GPs densifies the ground adjacent to GPs inducing additional benefit. Advantages of GP to resist compressive and shear loads are well documented and attempts to extend its utility to resist tensile loads is being investigated. An anchor is placed at the base of granular pile and attached to the footing by a cable or rod which transfers applied pullout force to the bottom of GP. Such an assembly is termed as 'Granular Pile Anchor' (GPA). Experimental study on laboratory models of GPA in clayey sand for different compaction properties lead to different undrained shear strength and stress – strain characteristics. Pullout resistance derived from pile capacity is mainly affected due to the variation in undrained shear strength with depth. Results are presented as variations of load – displacement responses and failure patterns for three different undrained shear strength values.
Year: 2014
Issue: Jun-Aug
Title:Granular Pile Anchors For Soft Soils
Author Name:Eswara Reddy.O, Madhav.M.R , Saibaba Reddy.E and Vidyaranya Bandi
Synopsis:
Soft soils need to be improved to make them suitable for construction. Granular Piles (GP) are effective and economical solutions to improve the behavior of the soft soil by increasing bearing capacity, reducing settlements due to reinforcement. Granular piles due to their inherent advantage are effective in countering swell pressures from expansive clays. Installation process of GPs densifies the ground adjacent to GPs inducing additional benefit. Advantages of GP to resist compressive and shear loads are well documented and attempts to extend its utility to resist tensile loads is being investigated. An anchor is placed at the base of granular pile and attached to the footing by a cable or rod which transfers applied pullout force to the bottom of GP. Such an assembly is termed as 'Granular Pile Anchor' (GPA). Experimental study on laboratory models of GPA in clayey sand for different compaction properties lead to different undrained shear strength and stress – strain characteristics. Pullout resistance derived from pile capacity is mainly affected due to the variation in undrained shear strength with depth. Results are presented as variations of load – displacement responses and failure patterns for three different undrained shear strength values.
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