Inflation/Foam/Shotcrete System for Rapid Construction of Circular Arches.

摘要

This study analyzed, designed, and fabricated a semicircular arch structure 32 ft (9.8 m) long by 13 ft (4 m) high using the inflation/foam/shotcrete (IFS) system. Equipment cost, man-hours, skill levels, and time required for construction were monitored. The test results indicate that the IFS system can be used to construct arch-shaped structures. Skills required to operate the foam and shotcrete equipment are consistent with those available in the Army. The structural failure of the urethane foam arch indicated that creep is a significant factor in the behavior of the polyurethane foam arch and can cause instability and collapse. (Author)