摘要
以软土区某大型圆形煤地基处理为背景,提出采用场内深搅桩复合地基、环基下高压旋喷桩墙的多重地基处理方法;结合相应规范,分别采用等应变法和有限元法对深搅桩复合地基的材料参数进行了比较分析;采用有限元软件ANSYS,使用比较分析后的复合地基参数,建立包括上部结构、桩基础和复合地基的三维非线性有限元模型进行计算分析,结果表明该多重地基处理方法能满足地基承载力和稳定要求,有效增强灌注桩的协调工作能力,大幅度降低桩基的内力,使桩基础的配筋量得到有效控制.
Taking the ground treatment of a large coal silo in soft soil region as a background,a multiple treatment method by using cement-soil deep mixed piles and jet grouting piles is presented.According to the relevant code,and by using the equal-strain method and finite element method the material properties of deep mixed piles-composite foundation are analyzed and compared.Using the finite element software ANSYS,a three-dimensional nonlinear finite element model is built,which includes superstructure,cast-in-place pile and composite foundation;and then the effect of ground treatment is analyzed.The result shows after treating with multiple treatment the ground bearing capacity and stability is satisfied;the co-operating capacity of cast-in-place pile is enhanced;the inner force and ratio of reinforcement of the cast-in-place pile is diminished effectively.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2009年第S1期307-311,共5页
Engineering Journal of Wuhan University
关键词
深搅桩
复合地基
软土区大面积堆载
非线性有限元
等应变法
deep mixed piles
composite foundation
surcharge load on soft soil
nonlinear finite elements
equal-strain method
