Study on the Application of Vibrating Rod Compaction Method in the Treatment of Liquefied Foundation in High Intensity Area
The Kashgar region,located in the most western part of China,is characterized by high seismic intensity and extensive presence of the Gobi desert.The soil in this region is prone to liquefac-tion under the action of earthquakes.The study used the G314 Kashgar transit section highway project as a basis,adopting the vibrating rod compaction method and gravel piles to reinforce high-intensity liquefiable sites.The reinforcement effect was evaluated by static cone penetration test(CPT)and standard penetration test(SPT).The study examined the impact of the superimposed effect on the re-inforcement and the change in horizontal stress of the soil before and after the vibration,demonstrating the good applicability of the cross-wing vibrating rod compaction method for treating liquefiable foun-dations in the Gobi desert of high-intensity areas(VIII-degree areas).The in-situ test results showed that:(1)After reinforcement using the vibrating rod compaction method,the cone tip resistance,side-wall friction resistance and standard penetration number of the soil increased significantly.The com-pactness of the soil reached a medium density state,the liquefaction resistance improved,and the hori-zontal stress of the liquefiable soil layer increased significantly.(2)The reinforcement effect at the cen-troid of the three-point layout was significantly improved compared with other locations.(3)The deep-er the treatment depth,the more significant the treatment effect of vibrating rod compaction method was compared with the gravel pile.The vibrating rod compaction method has proven effective in rein-forcing liquefiable foundation of the Gobi desert in high intensity area,effectively eliminating liquefac-tion,offering deep reinforcement,low costs,and good prospects for widespread application.
foundation treatmentvibrating rod compaction methodhigh intensity areastandard pene-trationstatic cone penetration
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