The safety monitoring of a 50 000 m 3 oil tank foundation with many embedded prototype observation devices shows that, it is practicable to use cement deep mixing piles to improve mucky clay of 20 m in thickness and 26 m in depth.

• 通过一座桩身和土体中埋有各种观测仪器的 5× 1 0 4 m3 油罐地基试验 ,结果表明用超长水泥土搅拌桩处理 2 6m深、2 0 m厚的淤泥质粘土是可行的。