Two test piles with diameter of 1.2 meters, 15 meters long were poured on is-land of permafrost at the high latitude and low altitude area, and the temperature monitoring system was set on them. According to the temperature test results, the self-balance static load test was carried out on the piles before pile foundation frozen and after. The test result shows that the Ultimate bearing capacity value of borehole friction pile in permafrost is 1.42 times of non-permafrost. According to the value of the ultimate bearing capacity of friction pile in permafrost, the permafrost friction resistance value of each permafrost layer could be calculated on the condition mentioned above. The test results provides the theory basis for the bridge bored piles design and construction in Great Xinanling area.%通过在高纬度、低海拔岛状多年冻土浇筑两根直径1.2 m、长度15 m的试验桩,研究人员布设了温度监测系统,依据温度检测结果,在桩基回冻前、后进行了自平衡静载试验。试验结果得出桥梁钻孔摩擦桩在多年冻土中的极限承载力是非多年冻土极限承载力的1.42倍,根据试验研究确定桥梁钻孔摩擦桩在多年冻土中的极限承载力值,可以计算出该地质条件下各冻土层的摩阻力值,可为大兴安岭地区多年冻土条件下桥梁钻孔灌注桩的设计和施工提供理论依据。
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