Multifield coupling model and its applications for pile foundation in permafrost  

作　　者：WU Yaping1,2, ZHU Yuanlin2, GUO Chunxiang1, SU Qiang1 & MA Wei2 1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China 2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 

出　　处：《Science China Earth Sciences》2005年第7期968-977,共10页中国科学（地球科学英文版）

基　　金：the National Natural Science Foundation of China(Grant No.50378043);Open Foundation of State Key Laboratory of Frozen Soil Engineering of China;"ChunhuiProjeci of China Education Ministry;"Qinglan’Talent Engineering Foundation of Lanzhou Jjactong University.

摘　　要：Importing the interface element which links the frozen soil base with concrete piles and considering the couplings of stress field, temperature field and moisture field, this paper es- tablishes the nonlinear visco-elastic plastic finite element model of pile-soil. For a practical bridge structure the stress field and displacement field of single pile in freezing process are calculated. This paper emphatically studies the process of the tangential frost heave stress field, freezing stress field and displacement field varying with time, and ulteriorly studies time variation process of single pile carrying capacity in freezing process.Importing the interface element which links the frozen soil base with concrete piles and considering the couplings of stress field, temperature field and moisture field, this paper es- tablishes the nonlinear visco-elastic plastic finite element model of pile-soil. For a practical bridge structure the stress field and displacement field of single pile in freezing process are calculated. This paper emphatically studies the process of the tangential frost heave stress field, freezing stress field and displacement field varying with time, and ulteriorly studies time variation process of single pile carrying capacity in freezing process.

关 键 词：PERMAFROST PILE FOUNDATION FREEZING PROCESS multifield COUPLING analysis model. 

分 类 号：P642.14[天文地球—工程地质学]