Design and Application of Deck Derrick Crane for Yonjiang Main Bridge

Yongjiang Main Bridge is the first cable-stayed bridge with railway hybrid girder. Its side span and partial middle span concrete box girder were constructed as cast-in-place with bracket. Shipping is limited by middle span steel box girder,so new techniques like side span lifting girder,transporting girder above girder,rotating and suspension installing were used in construction. After comparing and selecting programs steel girder rotating and suspension installing instrument—rotating deck derrick crane was chosen for construction. Its main design index,mechanical construction,installation procedure and form testing were introduced. Main points of operating,using and maintenance were explained.