严寒地区冻土地质条件下阶型直柱基础的分析与研究  

Analysis and Research on the Straight Column Foundation with Stages under the Geological Conditions of Permafrost in Cold Region

作　　者：张翼虎[1] 于彬[1] 张立[1] 李健辉 ZHANG Yi-hu;YU Bin;ZHANG Li;LI Jian-hui(Jiangsu Keneng Electric Power Engineering Consulting Co.Ltd.,Nanjing Jiangsu 210036 China;East Inner Mongolia Power Co.,Ltd,Huhehaote Inner Mongolia 010020 China)

机构地区：[1]江苏科能电力工程咨询有限公司,江苏南京210036 [2]国网内蒙古东部电力有限公司,内蒙古呼和浩特010020

出　　处：《江苏建筑》2018年第3期85-87,共3页Jiangsu Construction

摘　　要：为了深入研究严寒地区冻土地质条件下直柱基础的应力应变特性,构建了阶型直柱基础模型,利用数值模拟方法分析基础在不同冻胀工况下的结构响应,并与未冻胀情况进行对比。分析结果表明切向冻胀力对于基础有明显的上拔作用,在强冻胀等级下基础发生上拔破坏。当冻土处于强冻胀等级及以上时,设计严寒地区输电线路基础需要考虑降低冻胀力的措施。In order to further study the stress-strain characteristics of straight column foundation in severe frozen area, a straight column foundation model with two stages is constructed. The structural response of foundation under different frost heaving conditions is analyzed by numerical simulation method, and compared with that of normal condition. The results show that the tangential frost heaving force has a significant uplift effect on the foundation, Under the strong frost heaving grade, the foundation occurred uplift failure. When the permafrost is in the strong frost heaving level and above, the measures to reduce the frost heaving force should be considered in the design of the transmission line foundation in the cold area.

关 键 词：严寒地区 冻胀土 直柱基础 切向冻胀力 

分 类 号：TU475.2[建筑科学—结构工程]