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Experimental study on the effect of cyclic preloading on the resistance to liquefaction of saturated loose sand under wave loading

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Abstract

By using the soil static and dynamic universal triaxial and torsional shear apparatus, a series of combined cyclic shear tests are performed to simulate the rotation in the principal stress direction induced by ocean wave. The tests include the cyclic preloading tests and liquefaction tests in the second loading on saturated loose sand with a relative density of 30%. The all tests are consolidated under isotropic condition. The effect of the cyclic preloading on the resistance to liquefaction of saturated loose sands under the condition of continuous rotation in the principal stress direction is investigated. Experimental data indicate that the void ratio of saturated sands has a negligible reduction after cyclic preloading. With the increase of the intensity of cyclic preloading (in the amplitude and in the number of cycles), the resistance to liquefaction in the second loading is increased continuously under the condition that the liquefaction does not occur during the cyclic preloading. The reason is that the construction of more stable structure due to the uniformity of the void and the better interlocking of the particles when the cyclic preloading is applied to the saturated sand.

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Correspondence to Zhen-dong Zhang  (张振东).

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Foundation item: the National Natural Science Foundation of China (Nos. 50579006 and 50639010)

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Zhang, Zd., Luan, Mt., Jin, D. et al. Experimental study on the effect of cyclic preloading on the resistance to liquefaction of saturated loose sand under wave loading. J. Shanghai Jiaotong Univ. (Sci.) 14, 398–403 (2009). https://doi.org/10.1007/s12204-009-0398-3

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  • DOI: https://doi.org/10.1007/s12204-009-0398-3

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