水泥搅拌桩的荷载传递规律

本文通过现场足尺试验，研究了水泥搅拌桩的荷载传递规律。结果表明，传到桩端的荷载占桩顶荷载的比例甚小。桩体的变形、轴力和侧摩阻力主要集中在０～ｌ＿ｃ（临界桩长）深度内。当外荷增大时，会使０～ｌ＿ｃ深度内桩体的变形增大，但当深度大于ｌ＿ｃ时，桩体变形、桩身轴力和侧摩阻力随外荷的增大变化均较小。水泥搅拌桩的破坏发生在浅层，破坏形式为环向拉裂或桩体压碎。在弹性范围内，桩身应力有限元计算值与实测值较一致。

Load Transfer Behavior of Cement Treated Soil Column

Load transferbehavior of cement treated soil column is studied by conducting full scale ieldtest.Results showed that the percentage of load transferred to the column end is small.The deforma-tion,axial stress and frictional resistance of column shaft occurred mainly within the depth 0～l_c（l_c: thecritical column length）.As the total load increased the shaft deformation,the axial stress and the fric-tional resistance increased greatly within the depth 0～l_c but they increase little for the depth below l_c.Failure of the column occurs mainly at the shallow depth under high compressive stress,and the failurepatterns of the column are of annular tension cracks and/or brittle cracks. In the elastic range,theaxial stresses by FEM are in agreement with measured results.