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《JOURNAL OF GLACIOLGY AND GEOCRYOLOGY》 1999-02
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Numerical Simulation of the Infulance of Seepage on Temperature Field of Roadbed in Permafrost Regions

LING Feng; WU Ziwang(State Key Laboratory of Frozen Soil Engineering, LIGG, CAS, Lanzhou 730000)  
This paper discusses the influence of seepage of surface water in the sides of embankment on the temperature field of roadbed in permafrost regions. First, a mathematical model is established based on the heat transfer theory and seepage theory.Then, based on the observed data, the variation process of temperature field in the experimental roadbed,which is in Huashixia along the Qinghai-KangdingHighway in the Tibetan Plateau, after five years fromthe present is simulated in terms of Galerkin finite element method. The prediction results show that in case of no seepage effect, the maximum thawing deepths of ground in left sides of embankment, embankment itself and right side of embankment in the fifth year are l.4 m, 3.2 m, l.4 m and in case of seepage effect they are 1.4 m, 3.6 m, 1.6 m, respectively. The seepage of surface water in the sides of embankment will deepen the maximum thawing depth, and the nearer the boundary of roadbed in horizonal direction to the headwaiers, the deeper the maximum thawing depth in the vertical direction is.
【Fund】: 交通部行业联合攻关项目;;冻土工程国家重点实验室基金!9807
【CateGory Index】: U416.1
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