摘要
由于“土拱效应”的存在,单支撑基坑开挖过程中的基坑变形性状、土压力分布及支护结构的变形、内力等在很大程度上取决于支撑施加时机,而支撑施加时机的选择受到很多方面影响因素的制约。文章利用有限元数值模拟方法,针对单支撑施加时机的支护结构设计参数方面的影响,就支护结构中支撑刚度大小、支撑位置的选择、支撑施加预应力、围护墙刚度,以及数值模拟计算中选取的接触面单元类型等进行了细致的计算、归纳、分析,得出了合理、正确的支护结构设计参数的结论。
Because of ＂the vaulted phenomena between the soil and the sustain＂ in the anchorage excavation piles, the excavation distortion character,the lateral earth pressure distribution, and the maintenance structure system deformation and its stress mainly depend on the infliction occasion of the sustain, however, the infliction occasion of the sustain is influenced by many complications . With the advantages of the FEM , Considering the influence of parameter of the inflicting occasion in the single - sustain structure, the paper calculate, induce and analyze the sustain stiffness, the sustain position, the sustain pre - stress, the retaining - wall stiffness, and interface character of numerical simulation, and at last gets the conclusion of design parameters of the single - sustain structure.
出处
《江苏建筑》
2006年第4期41-43,52,共4页
Jiangsu Construction
关键词
时机
“土拱效应”
基坑开挖
单支撑
连续介质有限元
Occasion
＂The vaulted phenomena between the soil and the sustain＂
Pit excavation
Single - sustain
Continuous medium FEM
