Analyses of Multi-Edge Footings Rested on Loose and Dense Sand

Abstract

Abstract

Pressure Settlement Behaviour and Bearing Capacity of Asymmetric Embedded Plus Shaped Footing on Layered Sand

“…Such designs require asymmetric plan shaped footings. There are studies on the bearing capacity of asymmetric or symmetric plan shaped footings in the literature that indicate that the performance of such footings (plus, H and T) was comparable to that of a square footing having similar area and lying on single layer of sand [6,7,3]. Research conducted on circular footing reveals that the performance of embedded circular footing is superior to that of the surface circular footing [12].…”

Experimental and numerical studies of skirted hexagonal footings on three sands

“…But there may be situations in which, due to economic and architectural reasons, specific geometries such as cross, T, H and hexagonal footings are required at a particular site. Such footings are called multiedge footings, as stated by Jaiswal and Sengupta [1] and Davarci et al [2]. The foundation design requires calculating the footings' bearing capacity to a reasonable accuracy in order to affect the economy as a whole.…”

“…A numerical analysis was performed by Ghazavi and Mokhtari [3] to analyse the behaviour of multi-edge shallow footing on sand using FLAC 3D. The laboratory tests on multi-edge footings were performed by Davarci et al [2] and reported that multi-edge footing performance was higher than that of square footing with the same width. A multi-edge H-shaped skirted footing laboratory model test was conducted by Gnananandarao et al [4] and reported that the multi-edge H-shaped skirted footing improved bearing capacity compared to the square skirted footing.…”

“…The above studies concluded that (1) skirted footings improve the bearing capacity with an increase in the footing/skirt roughness, (2) square skirted bearing capacity was close to the same size pier foundation bearing capacity, (3) circular skirted bearing capacity at the same depth of the skirt was higher than the skirted strip and (4) skirted footings on loose sand were more effective than those on medium or dense sand. It was reported by [2,3] that unusual geometries of the footings such as H, + and T could also improve the bearing capacity in comparison with the conventional geometry (square, rectangular, circular). Given the advantages of adding skirts to traditional footings, [4] recently reported a multi-edge H-shaped footing experiment with and without skirts on sand, varying the relative density and normalised skirt depth from 30 to 60% and 0.25 to 1.5, respectively, and confirmed the findings of [2] for unskirted multiedge footing.…”

“…It was reported by [2,3] that unusual geometries of the footings such as H, + and T could also improve the bearing capacity in comparison with the conventional geometry (square, rectangular, circular). Given the advantages of adding skirts to traditional footings, [4] recently reported a multi-edge H-shaped footing experiment with and without skirts on sand, varying the relative density and normalised skirt depth from 30 to 60% and 0.25 to 1.5, respectively, and confirmed the findings of [2] for unskirted multiedge footing. In addition, the skirts are attached to the periphery of the geometry of the footing as evident from the experimental and numerical study reported above in the literature to increase the bearing capacity.…”