What are main bridge construction types in China?
Main bridge construction types in China:
- Installation of bridge girders for highway with a speed 120km/h. Highway design is usually of bi-directional and 4 lanes design with two paralleling piers in a row, each pier is placed 5 pieces of concrete girders, each girder weight 80-200t, length 30-50m. HZQ series highway launching girder is popular in highway bridge construction.
- Installation of bridge girders for railway with a speed <= 120km/h. common railway is usually of single lane design with 2 concrete girders on each pier, double lanes design with 4 concrete girders on 2 piers, each girder weight 160t, length 32m. HZQ165T launching girder is specially designed for above bridge.
- Installation of bridge girders for urban light rail with a speed 200km/h. urban light rail is usually of double lanes design with 1 concrete girder on 1 pier, each girder weight 500t, length 24m or 32m. HZQ500 railway launching girder is specially designed for above bridge.
- Installation of bridge girders for high speed railway with a speed 250km/h. high speed railway is of double lanes design with 1 concrete girder on one pier, each girder weight 900t, length 24m or 32m. HZQ900T launching girder is specially designed for high speed railway.
Note:
Above 4 kinds of concrete girders are produced at a large quantity in special pre-cast yard, then lifted onto special girder carrier by gantry crane and transported to proper position so that the launching girder can install girders. The construction way needs a large pre-cast yard but features short construction period and high efficiency.
