摘要：The test environment has a significant influ- ence on the dynamic bearing characteristics of the reinforced-hoop gravel pile composite foundation. In this paper, the dynamic bearing characteristics of reinforced-hoop gravel pile composite foundationunder low temperature environment are systemati- cally studied. The influences of different tempera- tures, pile shape, frozen soil environment, soil water content, and freeze-thaw factors on the dynamic bearing characteristics of the reinforced-hoop gravel pile composite foundation are analyzed. The test re-sults show that low temperature is inversely propor- tional to the dynamic ultimate bearing capacity of the reinforced-hoop gravel pile composite foundation. As the temperature drops, the cohesion, friction an- gle between piles and the vertical ultimate bearingcapacity of the composite foundation of reinforced- hoop gravel piles increase. The vertical bearing ca- pacity of square piles is lower than that of cone piles, and the lower the upper limit of frozen soil, the higher the pile tip resistance. With the increase of temperature, the freezing strength and bearing ca- pacity of the composite foundation of reinforced hoop gravel piles in frozen soil decrease. The bear-ing capacity of the reinforced-hoop gravel pile com- posite foundation is inversely proportional to the number of freeze-thaw cycles and water content.
