Xihoumen Rail-cum-Road Bridge Mega Pile Project
Main pier features 18 mega bored piles of 6.3m diameter, 106m depth with 40m socketed into bedrock, constructed using the world's highest-capacity rotary drilling rigs.
项目挑战
Complex seabed strata with highly weathered granite and fractured rock, with the 6.3m super-large diameter drilling difficulty being globally unprecedented.
解决方案
Adopted a four-stage reaming process (2m→3m→4.5m→6.3m), breaking through the 1.8m diameter increment limit, paired with custom large-diameter drilling tools and teeth.
项目成果
Average 10 days to complete a single mega pile, with efficiency 15% ahead of industry benchmarks, providing solid support for this world-class rail-cum-road bridge.