摘要
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 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.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1994年第4期1-8,共8页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金和浙江省自然科学基金
关键词
水泥搅拌桩
荷载传递特性
有限元
deep mixing method,behavior of load transfer,finite element method.
