摘要
土拱效应是广泛存在的自然现象,是由于介质的不均匀位移导致土体表现出一种特有的空间效应。土拱效应是造成支护结构所受土压力与库伦理论、郎肯土压力理论的计算结果有一定差异的一个重要原因。虽然已经研究了100多年,但是土拱效应仍然还存在许多值得讨论的问题。本文从土拱理论研究的现状出发,将土拱问题从土拱存在的条件、基于土拱效应的桩间距、土拱效应的影响因素、桩土应力分担比的影响等方面对各问题分类阐述,并在总结已有成果的基础上着重指出争议之处,为进一步开展、完善土拱效应研究提出建议。
Soil arching effect,as a widespread natural phenomenon,is an unique spatial effect of soil that caused by the uneven displacement of the medium.It is an important reason of the differences in the result of suffered earth pressure of supporting structure with that of Coulomb earth pressure theory and Rankine earth pressure theory.Although the studying process has being lasted for more than 100 years,there are many issues worthy of discussion about soil arching effect.Based on the present situation of studying of soil arching theory,The paper makes a classified elaboration of soil arching effect from the following aspects,the conditions for the existence of soil arch,the pile spacing of soil arch,the factors of soil arch and the factors of stress sharing ration of soil arch.It also summarizes the achievements that have been found and emphasizes on the controversial points.At last,the paper brings forward some suggestions for the further development of soil arching effect.
出处
《低温建筑技术》
2011年第11期82-84,共3页
Low Temperature Architecture Technology
关键词
土拱
条件
影响因素
桩间距
应力分担比
soil arch
conditions
factors
pile spacing
stress sharing ration
