Yichang Yangtze River Rail-Road-Tram Bridge
Rotary drilling rig bored pile foundation for the world's first triple-use cable-stayed bridge. 82 piles of 3m diameter drilled to over 80m depth in hard rock.
项目挑战
Alternating cobble layers, highly weathered sandstone, and limestone (uniaxial compressive strength >60MPa) creating extremely complex geological conditions.
解决方案
Deployed 6 large rotary drilling rigs simultaneously, optimized drill bit configurations for different strata, and adopted full mud displacement technology.
项目成果
Single-pile drilling achieved in 4-5 days, all 82 piles tested with 100% pass rate, laying a solid foundation for this world-class triple-use cable-stayed bridge.