Experimental study on liquefaction characteristics of sandy soil containing rubber particles
WANG Hang
ZHAO Shaofei
LIU Ziyuan
SONG Haoyuan
CHANG Yu
Abstract：Earthquakes are among the most prevalent natural disasters,and the liquefaction of sand and soil in-duced by seismic activity can result in significant casualties and substantial property damage.At present,the increasing accumulation of waste rubber poses a considerable environmental challenge.To investigate the po-tential of sandy soil mixed with rubber particles(hereinafter referred to as'rubber sand')in the context of seismic engineering,this paper examines the liquefaction characteristics of rubber sand through dynamic triaxial tests.The test were conducted on three different sizes rubber particles:fine,medium and coarse.Furthermore,the study considers the effects of three variables:the proportion of rubber particles(0％,10％,20％,and 30％),loading frequency(0.5Hz,1.0Hz,and 2.0Hz),and initial effective confining pressures(50kPa,100kPa,and 150 kPa)on the liquefaction performance of rubber sands.The results showed that the incorporation of rubber particles significantly enhanced the liquefaction resistance of the sand.The number of vibrations required for liquefaction increased nonlinearly with the addition of rubber particles.Specifically,when the incorporation a-mount was within 20％,the increase in the number of vibrations was slight;however,once it exceeded 20％,the number of vibrations required for liquefaction increased significantly.Additionally,the effect of mixing larger rubber particles(coarse)was found to be more pronounced.As the loading frequency increased,the number of vibrations required for liquefaction of rubber sand also increased,while the pore water pressure accumulation rate slowed down,thereby enhancing liquefaction resistance.Furthermore,with an increase in the initial effec-tive perimeter pressure,the number of vibrations required for liquefaction increased significantly.For the three rubber particle sizes-fine,medium and coarse-the number of vibrations required for liquefaction at an initial effective perimeter pressure of 150 kPa increased linearly with the increase in peripheral pressure.These find-ings provide a foundational basis for optimizing waste rubber resource utilization technology and enhancing the seismic capacity of sandy soil foundations.
Keywords：standard sandrubber particlesliquefaction characteristicsdynamic triaxial test
Publication Date：2025-10-30
Online Publishing Date：2025-11-06(First online date of this platform, not the publication date of the document)
Pages：9( 101-109 )