1, pile foundation or enlarged foundation. Pile foundation includes manual digging pile, underwater drilling pile and sinking pile, etc.

2. Lower part: tie beam or bearing platform, pier column, capping beam and supporting cushion stone.

3. Upper part: beam and slab, which are divided into cast-in-place and prefabrication, including prestressed tensioning and grouting, bridge deck, guardrail and other detailed processes.

4, other drainage, abutment plate, expansion joints.

Concrete is divided into steel binding, formwork weaving, pouring, formwork removal and maintenance.