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Evaluation of Ground Improvement for Liquefiable Deposits Using Shear Wave Velocity
Quality control of ground improvement is a difficult but very important aspect of liquefaction mitigation construction. In this paper, an approach to evaluate the improvement level in liquefiable soils treated by stone columns was developed based on the liquefaction resistance-shear wave velocity-void ratio correlations of sandy soils. According to this method, the required level of ground improvement is supposed to be obtained once the target velocity is reached for a given earthquake magnitude, and this requirement will transfer to the void ratio control during stone column installation. A case study using vibro-stone column is introduced, where field tests including seismic testing (SASW) and SPT were performed before and after ground treatment, and the effectiveness of stone columns for liquefaction mitigation was properly evaluated by shear wave velocity. The high consistency between Vs-based and SPT-N value-based evaluations indicates that shear wave velocity could be used to develop criteria for ground improvement needed to mitigate liquefaction.
Evaluation of Ground Improvement for Liquefiable Deposits Using Shear Wave Velocity
Quality control of ground improvement is a difficult but very important aspect of liquefaction mitigation construction. In this paper, an approach to evaluate the improvement level in liquefiable soils treated by stone columns was developed based on the liquefaction resistance-shear wave velocity-void ratio correlations of sandy soils. According to this method, the required level of ground improvement is supposed to be obtained once the target velocity is reached for a given earthquake magnitude, and this requirement will transfer to the void ratio control during stone column installation. A case study using vibro-stone column is introduced, where field tests including seismic testing (SASW) and SPT were performed before and after ground treatment, and the effectiveness of stone columns for liquefaction mitigation was properly evaluated by shear wave velocity. The high consistency between Vs-based and SPT-N value-based evaluations indicates that shear wave velocity could be used to develop criteria for ground improvement needed to mitigate liquefaction.
Evaluation of Ground Improvement for Liquefiable Deposits Using Shear Wave Velocity
Zhou, Yan-Guo (author) / Chen, Yun-Min (author) / Chen, Ren-Peng (author)
U.S.-China Workshop on Ground Improvement Technologies 2009 ; 2009 ; Orlando, Florida, United States
Advances in Ground Improvement ; 150-159
2009-03-10
Conference paper
Electronic Resource
English
Evaluation of Ground Improvement for Liquefiable Deposits Using Shear Wave Velocity
| British Library Conference Proceedings | 2009
System response of liquefiable deposits
| Elsevier | 2018