The Study of Large Vibration Compaction on Soil-Stone Mixture Poisson′s Ratio with Wave Velocity

Abstract

The equipment of large vibration compaction was designed and adopted to simulate the changes of mechanical properties of mixture, by large laboratory vibration compaction test under the condition of different water content and different soil-stone proportion with sandy soil, silt soil and low liquid-limit clay. The deformation capability in each direction of foundation mixture in different compactness was studied by analyzing poisson′s ratio. The change law of poisson′s ratio, shear-wave velocity, longitudinal wave velocity of mixture in different compaction degree were revealed. Model of correlation between poisson′s ratio (μ) and ratio of the S to P wave velocity (ε) was proposed. The model was verified by extra test. The results show that the relationship between μ and ε is not accord with theoretical formula because of special particle shape and distribution of the soil-stone mixture. The change regularity of mixture poisson′s ratio in different conditions can be reflected well by the model. The new method of field test of poisson′s ratio in soil-stone foundation with ratio of the S to P wave velocity is proposed. The conclusion is valuable in poisson′s ratio study of soil-stone mixture.