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桩基础约束条件下季节冻土场地冻胀量的二维数值求解
引用本文:徐学燕,李海山,邱明国,陶兆祥.桩基础约束条件下季节冻土场地冻胀量的二维数值求解[J].哈尔滨建筑大学学报,2001,34(6):8-11.
作者姓名:徐学燕  李海山  邱明国  陶兆祥
作者单位:1. 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150090;中国科学院寒区、旱区环境与工程研究所冻土工程国家重点实验室,甘肃,兰州,730000
2. 中国科学院寒区、旱区环境与工程研究所冻土工程国家重点实验室,甘肃,兰州,730000
基金项目:中国科学院寒区、旱区环境与工程研究所冻土工程国家重点实验室基金资助项目
摘    要:根据热传导理论建立水热相互迁移模型,利用有限差分方法求解二维季节冻土的时程温度场,由二维土体中水份迁移质量微分方程求解成冰量,进而得到场地的自由冻胀量。由于建筑物基础的侧表面对土体冰胀过程产生约束作用,使土体产生与冻胀相反的约束变形,因而桩基础约束条件下季节冻土场地的最终冻胀量为有限差分方法求解的自由冻胀量与约束冻胀量之差;该理论计算结果与模型试验实测值基本吻合,验证了该数值求解方法的正确性与合理性。

关 键 词:冻土  温度场  自由冻胀量  约束冻胀量  桩基础
文章编号:1006-6780(2001)06-0008-04

Calculation of frost heave in seasonal frozen soil under piled foundation restrain condition
XU Xue-yan ,LI Hai-shan ,QIU Ming-guo ,TAO Zhao-xiang.Calculation of frost heave in seasonal frozen soil under piled foundation restrain condition[J].Journal of Harbin University of Civil Engineering and Architecture,2001,34(6):8-11.
Authors:XU Xue-yan    LI Hai-shan    QIU Ming-guo    TAO Zhao-xiang
Affiliation:XU Xue-yan 1,2,LI Hai-shan 1,2,QIU Ming-guo 1,2,TAO Zhao-xiang 2
Abstract:With hydrothermal transfer model set up on the basis of heat transfer theory and two di-mensional season frozen soil time path temperature field solved by means of finite-difference method.The quantity of ice formed is calculated by the transfer mass differential equation for water in the two dimensional frozen oil,and consequently,free frost heave quantity in this field is obtained.Because the side fall of building foundation has a restraint effect on the soil during the course of soil frost heave,the soil will deform opposite to frost heave.So under the condition of the piled foundation re-strainment,the ultimate quantity of frost heave in seasonal frozen field is the differential value be-tween the quantity of free frost heave and the quantity of restraining frost heave calculated by finite-difference method.The theoretical calculation values are basically coincidence with those measured during model experiments.Thereby justifying the correctness and rationality of the finite -difference method.
Keywords:frozen soil  temperature field  free deformation of frozen soil  restraint  deformation of frozen soil  
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