New Prediction Formula of Sand Liquefied on Bachu-Jiashi Earthquake Survey

Abstract

Through the Bachu-Jiashi Ms6.8 earthquake liquefaction investigation and test, obtain the 47 the standard penetration test date, examine the existing standard applicability based on standard penetration test of soil liquefaction identification method, and put forward the new sandy soil liquefaction evaluation formula. Analysis shows that the current assessment formula base on SPT counts of soil liquefaction are not applicable to Xinjiang region, will give the risky results. In the new survey data of soil liquefaction evaluation model established of five parameters by the earthquake intensity, the measured SPT counts, datum SPT values, groundwater level, and sand buried depth. The datum SPT values, the influencing coefficients of water and sand depths are gain by a normalized method and by an optimizing method. Establish new formula of soil liquefaction evaluation to the success judging rate is higher, the model shows that constructing reasonable and calculation formula is reliable, can be employed for regional code formulation in Xinjiang area.

A ∼28-kyr Continuous Lacustrine Paleoseismic Record of the Intraplate, Slow-Slipping Fuyun Fault in Northwest China

“…However, these modelling results cannot be simply applied to Yileimu Lake because the lithology, sediment compaction and SSDS in the Y20B core, and the water depth of Yileimu Lake are significantly different from those in Dead Sea. In northern Xinjiang, a minimum intensity of 6.35 MMI could trigger slight SSDS (e.g., linear waves), and an intensity of 7 MMI was able to cause extensive soil liquefaction (Li et al, 2012). Therefore, a local intensity of 6.35 MMI was used as a threshold to trigger SSDS of linear waves in Yileimu Lake.…”