Analysis on Construction Technology of Full Casing and Full Rotation of Pile Foundation in Strong Karst Area
In order to ensure the stability and safety of pile foundation construction,taking a highway bridge project as an example,the full casing and full rotation construction technology of pile foundation in strong karst area was deeply analyzed,and its construction effect was evalu-ated.It is found that the verticality deviation of drilling hole can be controlled within±0.5%,the verticality deviation of steel cage can be con-trolled within 0.5%,the qualified rate of welding quality is more than 98%,and the average drilling speed can reach 1.8 m/h,which effec-tively ensures the efficiency and safety of construction.
Highly developed karst areaPile foundationFull casing and full rotation construction technology
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