路堤荷载下水泥土搅拌桩复合地基荷载传递机理研究

采用数值计算方法，系统研究了桩体压缩模量、桩间距及桩长对水泥土搅拌桩复合地基荷载传递的影响。研究结果表明:随着桩间距的逐渐增大，桩身轴力、桩侧摩阻力及桩土应力比也随着逐渐增大，而桩体荷载分担比逐渐减小；随着桩体压缩模量或桩长的逐渐增大，桩身轴力、桩侧摩阻力、桩土应力比及桩体荷载分担比均是逐渐增大。在工程实践中，通过增大桩体压缩模量和桩长，减小桩间距，就能使桩体承担更多的上部荷载，从而充分发挥桩体作用。

Study on Mechanism of Load Transfer inside Cement-soil Mixed Composite foundation under Embankment Load

The numerical calculation was used to systematically study the influence of pile compressive modulus, pile spacing and pile length on load transfer inside cement-soil mixed pile composite foundation. The results show that, with the increase of pile spacing, the pile axial force, the pile side frictional resistance and pile-soil stress ratio increase and the pile efficacy decreases gradually; however, with the increase of pile compressive modulus or pile length, the pile axial force, the pile side frictional resistance, the pile-soil stress ratio and pile efficacy all increase gradually. In engineering practice, the pile body can bear more upper load by increasing the pile compressive modulus and the pile length and reducing the pile spacing, through which the pile body can be brought into full play.