ASTM - GEOTECHNICAL TESTING JOURNAL
A New Experimental Technique to Investigate the Load-Bearing Mechanisms of Smeared Rock-Socketed Piles Using In Situ X-ray CT Im
The design of rock-socketed piles at the serviceability state primarily depends on the shaft resistance (skin friction) at the interface, which may be influenced by the presence of weak smear (e.g., bentonite filter cake, soil, and remolded weak rock). To date, two-dimensional
direct shear interface testing has been utilized to interpret the effect of smear on the shaft response of bored piles. However, without the nondestructive testing and three-dimensional (3D) visualization of smeared interfaces, the effect of smear at the pile-rock interface cannot
be accurately assessed. This study presents a novel methodology to cast and test small-scale rock-socketed piles with 3D smeared pile-rock interfaces using in situ X-ray computed tomography (CT) imaging.
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