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| STUDY OF DESIGN OF FILLING MATERIAL AND SETTING ANTI-FROST LAYER FOR HIGH-SPEED RAILWAY ROADBED IN SEASONALLY FROZEN REGIONS |
| LIU Hua，NIU Fujun，NIU Yonghong，LIN Zhanju，LU Jiahao |
(State Key Laboratory of Frozen Soil Engineering，Cold and Arid Regions Environmental and Engineering Research Institute，
Chinese Academy of Sciences，Lanzhou，Gansu 730000，China) |
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Abstract Due to that the roadbed of the high-speed railway does not allow the serious deformation，the design of filling material and its anti-frost ability have become an important technical problem in the seasonally frozen regions. According to the referring and analysis for the frost-sensitive classification and the anti-frost method of roadbed filling material in different industries at home and abroad，the frost classification of filling material of the high-speed railway roadbed which is suitable for the seasonally frozen regions in China is discussed combining the specific engineering case，Harbin—Dalian passenger special line. About 70% frost heave amount of the high-speed railway roadbed is found at the upside of underlying roadbed by measured data and analyzing the distribution of frost heave amount along the frozen depth. The result will be used to estimate the thickness of anti-frost layer. The result calculated by the finite element method shows that the maximum frozen depth using modified materials A and B is less about 20 to 30 cm than that using common materials A and B，additionally the warming in the former is quicker than that in the latter. The results above also indicate that the roadbed using modified filling materials has good effects to heat preservation and temperature rising.
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Received: 17 March 2011
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2011, Vol. 30 
