摘要
我国高纬度多年冻土区主要为岛状多年冻土,主要分布在我国东北的大小兴安岭地区,其中根河作为中国冷极,具有明显的代表特性。通过对根河区内几条主要电力线路的调研发现,电力杆塔基础存在冻拔、融沉、倾斜以及冻裂等严重的冻害问题。针对以上问题进行分析,结果表明,其冻害产生的关键是由高含水率、高有机质含量粉黏土、泥炭土和腐殖质土在较大变温模式和水分补给下的复杂冻融特性与杆塔发生相互作用所导致。并针对冻害问题提出合理的冻害防治措施,对解决以根河为代表的我国高纬度多年冻土区电力杆塔基础冻害问题具有重要的意义。
The permafrost in high latitude in china is mainly island permafrost, the most parts of which distribute in the Greater and Lesser Khingan Mountains in the northeast of China. As Chinese Cold Pole, the Genhe city, is a representative of the high latitude permafrost. This paper obtained some conclusions from the investigation and survey of some major electric power tower lines. The foundations in these lines had serious frost problems, such as soil-lifting frost, thaw settlement, pipe lean and frost crack. Against analysis of above questions, the result shows the reason for these problems were accounted to the interaction of the pipe foundation surface andcomplex freeze-thaw characteristics based on the large temperature fluctuation and water supplement in the situation of high moisture content, high organic matter content of powder clay, mud soil , humus soil. Therefore, study on the mechanism of the frost damage and present reasonable measures has big important significance for this kind of problems.
作者
刘万福
曹阳
丛日立
赵明宇
张伟东
CHINALIU Wanfu;CAO Yang;CONG Rili;ZHAO Mingyu;ZHANG Weidong(State Grid East Inner Mongolia Economic Technology Research Institute,Hohhot 010020,China;State Grid East Inner Mongolia Electric Power Company Limited,Hohhot 010020,China;Institute of Transportation,Inner Mongolia Univ.,Hohhot 010070,China)
出处
《低温建筑技术》
2018年第10期119-124,共6页
Low Temperature Architecture Technology
基金
国网内蒙古东部电力有限公司科技项目(52660616000Q)
国家自然科学基金(51769018)
内蒙古自治区自然科学基金项目(2017MS0106
2017BS0401)
内蒙古大学横向课题(22200-5176015)
关键词
高纬度多年冻土
电力杆塔基础
冻害机理
防治措施
high latitude permafrost
electric power tower foundation
freezing damage mecha原nism
control measurement
