Author(s)

Y. Tanaka & K. Shirakawa

Abstract

Mechanism of sand liquefaction as studied by acoustic emission Y. Tanaka, K. Shirakawa Department of Civil Engineering, Kobe University, Nada, Kobe, Japan ABSTRACT The mechanism of sand liquefaction was studied by performing a series of undrained triaxiai test with measurement of Acoustic Emission (AE). The AE measurement is a technique to monitor minute sounds which are generated by slippages of sand particles during loading. By detecting the initiation of AE as sand being loaded, the yielding stress of sand can be determined since the AE should indicate the irrecoverable movements of sand particles. Isotropically consolidated sand was subjected to a cycle of undrained triaxiai loading first, and then the yield locus of sand after such loading was determined by performing various stress probing tests with AE measurement under drained loading condition. The shape of yield locus of the isotropically consolidated sand before undrained loading was found to be elliptic on the p (i.e., mean

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