Yongan DZJ-400 tandem vibratory hammer is successfully used in Maanshan Yangtze river bridge MQ-3 section.

This section includes North Tower and approach bridge over the river bank. The north tower foundation use 54 pcs, 2.5m dia bore-hole poured pile. Bottom elevation -75m, pile length 76m. The pile bottom load-bearing stratum is slightly weathering sandstone layer.

The pile cap is bending rectangle, the plan dimensation is 69.6M*32.1M, the thickness is 6M. The tower is gantry structure which is assembled by the tower column( down,middle,upper),the beam( upper and down) and the tower top. The tower column is steel concrete structure, the down beam is prestressing force concrete structure, the upper beam is steel structure. The tower height is 175.8M(Counting from the bottom of the tower).