摘要
应用杆系有限元法分析研究了深基坑支撑结构的刚度EA、位置Sx、道数和支撑预应力Fr等对支护桩的位移和内力M的影响．单支撑时存在着一个合理的支撑位置，当支撑布置在该位置时，桩身的最大位移或最大内力最小，按照变形控制原则确定的合理支撑位置距离桩顶约为基坑开挖深度的0．3～0．4倍．支撑存在着一个临界刚度，当支撑刚度达到临界刚度后，支撑刚度的变化对支护桩身的内力和位移几乎没有影响．该研究为合理地进行支撑结构设计和施工提供了理论依据．
Using linkage finite element method, the effect of brace＇s rigidity, position, number and prestress on the displacement, and internal force of pile is analyzed. There is a rational brace position when a single brace is set, and the maximum displacement and maximum internal force of pile is least when brace is set on the rational position. The distance of the rational brace position to the top of pile is about 0.3-0.4 times of excavating depth according to principia of deformation control. Brace has a critical rigidity, when brace＇s rigidity exceeds the critical rigidity, it has no influence upon the displacement and internal force of pile. Gist of theory is offered for brace design and construction in reason.
出处
《宁夏大学学报（自然科学版）》
CAS
北大核心
2006年第1期39-42,共4页
Journal of Ningxia University(Natural Science Edition)
基金
宁夏教育厅科研基金资助项目(01186)
关键词
深基坑
支撑
有限元
deep footing groove
brace
FEM
