摘要
全掏挖基础是人工在地基中直接掏挖出基础形状,插入钢筋笼,灌入混凝土形成基础的一种施工方法。采用规范中给出的土重法和剪切法,计算了输电线路杆塔基础的抗拔承载力,并与有限元计算结果做了对比,分析了土重法和剪切法计算的极限抗拔力对应的基础周围土体状态。土重法和剪切法计算的极限抗拔力均小于有限元计算的极限抗拔力,3种方法极限抗拔力土体均处于弹性状态。剪切法计算结果大于土重法,且有相应的安全度,基础设计中可以采用剪切法。
The foundation ditch of transmission line excavated by hand has the shape of concrete foundation, before inserting the reinforcing cages and pouring the concrete. Pile foundation pullout resistance is calculated by soil weight method and soil shear method that are given by the code. The results are compared with that by FEM. The condition of the soil around the foundation is analyzed. Pullout resistance given by soil weight method and soil shear method are both less than that given by FEM. The soil around the foundation is in elastic condition. The soil shear method yields a larger pullout resistance than that given by soil weight method, and has a reasonable safety factor, and can be used in foundation design.
出处
《工程勘察》
CSCD
北大核心
2009年第2期24-27,共4页
Geotechnical Investigation & Surveying
关键词
输电线路
抗拔分析
杆塔基础
全掏挖
黄土
overhead transmission line
pullout resistance analysis
poles and towers foundations
hand- excavation
loess
