混合桩的水平承载性能研究

STUDY ON THE HORIZONTAL PERFORMANCE OF HYBRID PILE

深水桥梁的钻孔灌注桩在成桩后,将施工阶段的钢护筒保留,形成了提高水平承载力的混合桩。目前混合桩已用于工程实践,但对其水平承载力性能缺乏系统的研究。本文考虑混合桩的结构特点和桩周土的相互作用,应用有限元方法数值模拟计算,分析混凝土桩身弹性模量、含钢率、泥皮的厚度及泥皮的弹性模量等变量对桩身水平承载性能的影响。

After bored pile of bridge in the deep water is finished, the steel casing in the construction stage is reserved to form hybrid pile which can improve the horizontal bearing capacity. At present, the hybrid pile has been used in project, however, the systematic research on the horizontal bearing perfo- mance is lacking. In this paper, according to the structure characteristics of hybrid pile and the interac- tion of soil around pile, it is simulated by the method of finite element. It is analyzed that how the hori- zontal bearing performance of hybrid pile is affected by the facts such as elastic modulus of concrete pile , steel ratio, thickness and elastic modulus of mud cake.