输电线路掏挖基础的抗拔承载特性数值分析  

Numerical Analysis of Uplift Bearing Capacity of Excavated Foundation for Transmission Towers

作　　者：郝冬雪[1] 樊广森[1] 姜春宝[2] 陈榕[1,3] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]惠州出入境检验检疫局综合技术中心,广东惠州516000 [3]大连理工大学岩土工程研究所,辽宁大连116085

出　　处：《水电能源科学》2012年第8期151-154,共4页Water Resources and Power

基　　金：中国电机工程学会电力青年科技创新基金资助项目(20110515);东北电力大学博士科研启动基金资助项目(BSJXM-201108)

摘　　要：针对输电线路掏挖基础上拔过程中基础底板周围土体的大变形问题,基于有限元软件ABAQUS建立了基础与周围均质地基土体共同作用体系的弹塑性有限元数值分析模型,采用ALE法通过变参数计算分析了土性参数、基础埋深与扩大头直径比(H/D)及基础与土接触条件对破坏模式和极限上拔承载力的影响。结果表明,该方法能准确计算和预测输电线路掏挖基础抗拔承载力的实际情况。Aiming at the large deformation problem of soil around the sole plate during uplift process of excavated transmission lines foundation, finite element software ABAQUS is used to establish elastic-plastic finite element model for analysis of the system of transmission tower foundation and its surrounding homogeneous soil. Arbitrary Lagrangian Eulerian method based alterable parameter is adopted to analyze the effects of soil properties, the ratio of embedment and base radius H/D, and contact conditions between foundation and soil on the failure mode and uplift bearing capacity. The results demonstrate that this method can effectively predict the practical operation of excavated foundation during uplift process.

关 键 词：有限元分析 掏挖基础 ALE方法 极限上拔力 破坏模式 

分 类 号：TU470[建筑科学—结构工程] TV473.1[建筑科学—土工工程]