Combining construction of main pier bearing platform of Panyu Municipal Bridge #3 Extension Project by adopting craned concrete box, this paper introduces construction of bottomless craned box for cofferdam with similar elevation of bearing platform and river bed.

As a variable cross-section continuous box girder bridge, Shanghai Songpu Bridge III adopted the steel box construction technology, and its middle main pier bearing platform was round-shaped by solid reinforced concrete.

In the construction of the main tower abutment of Hongdu south branch bridge,the site temperature monitoring control was exercised over the concrete hydration heat.

Combining with engineering practice,it typically puts forward method of adopting prefabricated pieces concrete as inherit platform bank cover concrete construction,expatiates constructing points of bottom mould,solves the problem of plentifully using rolled steel in high-frusta inherit platform bank cover concrete construction,enhances constructing quality at the same time.