多年冻土桩基础土体温度场数值分析  

Numerical analysis of permafrost soil temperature field of pile foundation

作　　者：陈学敏[1] 陈伟华[2] 徐学燕[2] 于皓琳[2] 

机构地区：[1]黑龙江省电力勘察设计研究院,哈尔滨150078 [2]哈尔滨工业大学土木工程学院,哈尔滨150096

出　　处：《黑龙江电力》2013年第2期127-129,共3页Heilongjiang Electric Power

摘　　要：针对多年冻土区发生的桩基础冻害问题,利用大型有限元分析软件ABAQUS对多年冻土桩基础的温度场进行了数值分析研究,阐述了伴有相变的土体导热基本方程,确定了温度场计算的几何模型及热学计算参数,对温度场数值计算结果进行了分析。分析结果表明,多年冻土区桩基础冻害与桩周土体温度场有关,桩基础周围土体冻结开始与融化时,靠近桩体上、下表土的温度较其它点处的温度变化快。Aiming at the freeze injury of pile foundation in the permafrost regions, this paper analyzes and studies the numerical value of the permafrost soil temperature field with the help of large finite element analysis software ABAQUS, expounds the basis equation of soil thermal conductivity with phase transition, determines the geometric model and thermal calculation parameters of temperature field, the numerical calculation result is analyzed as well, which shows that the freeze injury is influenced by the temperature field around pile foundation：when the pile foun-dation soil freezes or melts, the temperature of upper and lower surface of soil around pile foundation, compared to other areas, changes faster.

关 键 词：多年冻土 桩基础 温度场 数值计算 

分 类 号：TU445[建筑科学—岩土工程]