Abstract:

Vibro-replacement  stone column is uncemented structure. The deformation formed by the vertical load on the vibro-replacement stone column composite ground is more than that on rigid piles composite foundation. The relationship between a vibrator power performance indicators and stone column body strength is established for the study of the stone column composite ground settlement. In the light of compressive modulus concept, combined with vibrating stone column technology, established the relationship of stone column compressive modulus with vibrating force, density column long, density current and vibration time-which is called dynamic method. The compressive modulus from a dynamic method was used in settlement calculation and compared with that settlement using the modulus from load test. The deviation of the settlement with both methods from that based on actual observation projected value is less than 10%.

Key words: dynamic method, vibroflotation method, stone columns, foundations, compressive modulus, settlement calculation