Experimental study on lateral bearing behaviors of large-diameter monopiles in cement-soil
To study the lateral bearing behaviors of large-diameter monopiles in cement-soil,the centrifuge tests of large-diameter monopiles in cement-soil were conducted.The change rules of the lateral bearing capac-ity,the bending moment and the lateral soil resistance-lateral deflection(p-y)curves for reinforced and unre-inforced monopiles were analyzed.Based on typical p-y curves of the clay,the initial foundation reaction modulus and the ultimate soil resistance were revised to obtain a calculation model for the lateral bearing capac-ity of large-diameter monopiles by considering the radial inhomogeneity of surrounding soil and the dimension-al effect.The results show that comparing the unreinforced piles,the ultimate bearing capacity of reinforced piles is significantly improved.The initial stiffness and the ultimate bearing capacity of a single pile increase by 2.61 and 6.29 times,respectively.The bending moments of the reinforced and unreinforced piles have same variation tendency along the loading and depth,but the maximum bending moment of the reinforced pile is located near the mud surface.Cement-soil reinforcement can improve the initial stiffness and the ultimate soil resistance of the p-y curves,increasing the lateral bearing capacity of the pile foundation.The calculated values and measured ones agree well,which verifies the rationality of the proposed calculation method.
万方数据
维普
