摘要
注浆微型钢管桩作为一种新型支护形式,以其施工方便,具有超前支护作用,可以部分代替钢筋混凝土桩等优点,得到广泛应用.通过室内试验,对比分析了注浆前后微型钢管桩抗弯刚度变化.研究表明,注浆钢管桩刚度约为空心钢管桩刚度的1.2～1.5倍,注浆钢管刚度随管壁厚度增大有增大的趋势.试验结果有助于注浆微型钢管桩的进一步研究,为此类支护形式设计提供依据,具有一定的工程应用价值.
As a new supporting form,the grouting micro-steel piles have widely been used because of its advantages of more quickly construction and bigger lateral stiffness.This paper analyses the stiffness of micro-steel piles before and after grouting through the indoor tests.The study indicates that the stiffness of micro-steel piles before grouting is about 1.2~1.5 times after grouting.And the stiffness increases with the wall thickness increasement.The test results are conductive to a further study of the grouting micro-steel piles and supply the design basis with a certain value for engineering application.
出处
《青岛理工大学学报》
CAS
2012年第5期47-50,共4页
Journal of Qingdao University of Technology
基金
国家自然科学基金资助项目(51078196)
关键词
注浆微型钢管桩
横向刚度
组合结构
基坑支护
残余变形
grouting micro-steel piles
lateral stiffness
composite structure
foundation pit
residual deformation
