Study on Boundary Depth and Critical Shear Wave Velocity of Saturated Loess Foundation Liquefaction in Different Regions

Abstract:

Use of Seed’s simplified liquefaction evaluation method, combined with the dynamic triaxial test results, and the wave velocity of site liquefaction, to evaluate liquefaction potential of the four typical loess sites under the action of different seismic magnitudes, and calculate the boundary depth of the liquefaction site. Moreover, give the corresponding relationship between the typical loess site liquefaction boundary depth and shear wave velocity, and get the critical shear wave velocity of typical loess liquefaction site. The results of the study show that, (1) saturated loess site could be liquefied under the action of a certain intensity earthquake. (2) saturated soil layers which do not produce liquefied under the action of 6.5 degree earthquake, its critical shear wave velocity is about 227 m/s, and under the action of 7 degree earthquake its critical shear wave velocity is about 303 m/s, under the action of 8 degree earthquake its critical shear wave velocity is about 379 m/s. This conclusion enriches and develops the basis of liquefaction potential evaluation in the loess region.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 363-370
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.363
• Online since: January 2013
• Authors: Ping Wang, Zhi Jian Wu, Qian Wang, Jun Wang
• Keywords: Boundary Depth, Liquefaction Assessment, Loess Foundation, Shear Wave Velocity

References

[1] Ishihara K, Okusa S, Oyagi N, et al. Soils and Foundations, Vol. 4(1990), p.73.

[2] MingxueBai, Sumin, Zhang. Geotechnical Investigation & Surveying, Vol. 6(1990), p.1, In Chinese.

[3] QianWang, LanminWang, ZhongxiaYuan, et al. Hydrology ＆ Engineering Geology, 2012, 39 (2): 116-120, In Chinese.

[4] Lanmin Wang. Loess Dynamics, Beijing: Seismological Press, 2003, In Chinese.

[5] Lanmin Wang, Hongmei Liu, Lan Li, et al. Chinese Journal of Geotechnical Engineering, Vol. 1(2000) p.89 In Chinese.

[6] Wenshao Wang. Geotechnical Engineering, 2001, 23（6）: 655-658, In Chinese.

[7] Guoxing Chen, QingxingHu andXuezhu Liu. Earthquake Engineering and Engineering Vibration, 2002，22（1）：141-151, In Chinese.

[8] GB50011-2010. Code for Seismic Design of Building, Beijing: China Building Industry Press, 2010, In Chinese.

[9] QianWang. Physical Indicators Evaluation of Liquefaction Potential and Depth Lower Limit Research of saturated Loess, Lanzhou institute of seismology, CEA, 2011, In Chinese.

[10] BaoxiongLi, YonghongNiu and TiandeMiao. Rock and Soil Mechanics, 2007, 28（6）: 1077- 1082, In Chinese.

[11] Seed H B, Idriss I M．Simplified procedure for evaluating soil liquefaction potential, Proc. ASCE J SMFD, 1971, 97(SM9): 1249-1273.

DOI: 10.1061/jsfeaq.0001662