On May 8, the last Φ3.5m pile foundation of the Pingcen Expressway-Xunjiang Extra-large Bridge of CCCC Second Public Works Bureau, which was constructed by "Anhui Jinlin", was successfully poured, marking the project's 20 Φ3.5m main piers. The 5-meter pile foundation was successfully completed 15 days ahead of the planned construction period.

It is very difficult to form holes in Φ pile foundations.

This project is invested in the construction of JKL-20T large impact drilling rig, and the weight of a single customized hammer head reaches 18.6 tons. The equipment technology has outstanding pore-forming efficiency, good verticality control, easy deviation correction and treatment of slurry leakage at the bottom of the casing for complex geology such as shallow overburden bare rock inclined rock, high-strength medium-weathered sandstone, boulder boulder and so on. advantage.

"Anhui Jinlin", under the careful organization and correct leadership of the Pingcen Expressway Project Department of CCCC Second Public Service Bureau, the first Φ3.5m large-diameter pile foundation was successfully formed in only 14 days, and the 20 pile foundations of the main pier were more than planned The construction period was advanced by 15 days, and the node tasks were successfully completed, laying a solid foundation for the smooth progress of the subsequent construction of the project.