摘要
通过数值模拟,分析输电线路倾斜掏挖式基础在水平荷载作用下的荷载挠度特性。计算了垂直、正斜和负斜掏挖单基基础的侧向挠度和内力分布,结果表明在相同的水平荷载作用下,负斜掏挖单基基础比垂直掏挖单基基础能提供更高的抗力,而正斜掏挖单基基础与垂直掏挖单基基础只有较小的抵抗水平荷载的能力。根据输变电线路常用的桩顶自由的四基基础分别采用4种不同的配置形式:全部垂直;前排倾斜、后排垂直;前排垂直、后排倾斜;全部倾斜。通过变化倾斜掏挖基础的倾角表明四基基础全部倾斜以及前排垂直、后排倾斜的基础有较大的水平极限承载力,这2种基础形式中都有负斜掏挖式基础,因此有较大的抵抗水平荷载的能力。
The load-deflection characteristics of inclined excavated foundations of transmission lines in homogeneous soil under lateral loads are analyzed using a 3-D numerical simulation model. Calculation results of lateral deflection and internal force distribution of vertical, positive inclined and negative inclined foundations show that the negative inclined foundation has greater resistance to lateral loads than the vertical foundation and positive inclined foundation. Four different kinds of excavated foundations that are often applied in transmission lines, i.e. both vertical, front inclined and rear vertical, front vertical and rear inclined, and both inclined, are presented and discussed. It is demonstrated that the both inclined foundation and front vertical and rear inclined foundation proved to be the best configuration, and can provide greater resistance to lateral loads.
出处
《水利水电科技进展》
CSCD
北大核心
2008年第4期55-59,共5页
Advances in Science and Technology of Water Resources
基金
江苏省青蓝工程项目(2006)
关键词
输电线路
倾斜基础
水平荷载
挠度
基础受力分析
基础内力
transmission lines
inclined excavated foundation
lateral loads
deflection
analysis of forces on foundation
internal force of foundation
