Abstract
This paper presents the details of a series of model tests conducted to investigate the influence of relative density (Dr) of sand, the ratio of embedment depth (H) of anchor to diameter (D) of bell of anchor, diameter (D) of bell of anchor, and types of sand on uplift capacity of bell shaped anchor embedded in sand. From the experimental results, it has been found that uplift capacity of anchors increases with increases in relative density of sand and also H/D ratio. In the present investigation, the bell diameter of the anchors is kept as 125·0, 187·5, 250·0 and 312·5 mm. Three types of sand were used as foundation medium. From the experimental results, it is observed that sand with more fines exhibits lower values of ultimate uplift capacity of anchors. Based on the experimental data obtained in the present investigations, breakout factor (Fq) was calculated. From the calculated breakout factor (Fq), it is observed that the breakout factor (Fq) depends on relative density and H/D ratio. An empirical model has been developed to predict breakout factor (Fq) in terms of H/D ratio and relative density (Dr).
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