Abstract:

The large scale of soil liquefaction in Bachu-Jiashi earthquake in Xinjiang Autonomous Region on 24 February, 2003 is the most notable phenomena of sand liquefaction in China mainland since the Tangshan Great Earthquake in 1976. In terms of the investigation in Bachu-Jiashi area, the feasibility of conventional cone penetration test (CPT) to evaluating liquefaction, including Chinese code method, the Robertson method and the Olsen method, is inspected. The results show that the prediction success ratios of Chinese code, the Robertson and the Olsen methods used for the Bachu earthquake liquefaction prediction overall higher in non-liquefied sites than those in liquefied sites. The prediction success ratios are 88%, 71% and 88% for the non-liquefied sites; but 55%, 73% and 45% for the liquefied sites respectively, which are dangerous and reason should be identifed in the future. Also, an appropriate local liquefaction prediction method in Xinjiang region has to be established.

Key words: cone penetration test, sand liquefaction, evaluation, Bachu earthquake