Abstract:
Focusing on the problem of insufficient design data for the super-long piles, field test of distributed optical fiber technology is conducted on the mechanical behavior of the ultra-long piles in a typical supporting project in northwestern China. The results show that the pile side resistance increases first and then decreases along the pile depth, and the critical depth of the pile side friction is 26 m. It is concluded that the range of pile side friction is 58 m from pile body to pile top. The research results can directly guide the design and optimization of pile length.