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Abstract Damage resulting from liquefaction of saturated sands is one of the major geotechnical engineering problems during earthquakes. Different soil improvement techniques have been used to mitigate liquefaction hazards. Installation of gravel drains (stone piles) is one of the economical and effective soil improvement techniques . In this research, an extensive experimental studies have been carried out to establish the effect of gravel drains on liquefaction potential of liquefiable sand deposits. Shaking table apparatus of Ain Shams University was employed to perform the desired studies, using a large scale pin (110 x 110 x 70cm). Experimental modeling tests were divided into two groups. The first group concerns studying the effect of gravel drains on the behavior of modeled multistory building. The second group focuses on studying the stability of underground tanks, under the effect of water pressure mobilization due to dynamic loading. Parametric experimental model studies have been carried out to investigate the effect of pile diameter, pile length, arrangement of piles, spacing between piles and base acceleration of the exciting motion. Results of the model tests were utilized to identify the main features of the response of the liquefiable sand for the two practical problems of multistory structures and underground tanks, and their interaction with these deposits. |