(1Geotechnical Engineering Laboratory，Electric Power Construction Research Institute， Beijing 100055 China) (2Anhui University of Science and Technology， Huainan 232001 China)
Abstract：According to similarity theory，the principles and methods of the frozen model test for pile foundation of the 110 kV transmission line of Qinghai—Tibet Railway in frozen soils are determined. Then the freezing strength between frozen soils and piles，the bearing capacity of pile foundation and the frozen soil pressure on piles under the independent and combined actions of the uplifting，lowering and toppling loads are studied. The results indicate that the freezing strength between frozen soils and piles，the bearing capacity of pile foundation and the frozen soil pressure on piles will all dramatically decrease with the increase of temperature. So，temperature is the determinative factor of the bearing capacity of pile foundation. Some suggestions on the selection of foundation types and the design optimization of pile foundation of transmission line in frozen soils are proposed.
程永锋1 鲁先龙1 刘华清1 汪仁和2. 青藏铁路110 kV输电线路冻土桩基模型试验研究[J]. 岩石力学与工程学报, 2004, 23(S1): 4378-4382.
Cheng Yongfeng1，Lu Xianlong1，Liu Huaqing1，Wang Renhe2. model test STUDY on PILE FOUNDATION OF 110 kV TRANSMISSION LINE OF Qinghai—TIBET RAILWAY in FROZEN SOILs. , 2004, 23(S1): 4378-4382.
2004, Vol. 23 
