What does pier mean?

Pier is the substructure that supports the bridge span structure and transfers the dead load and vehicle live load to the foundation. The abutment is located in two lakes of the bridge. The pier is between two abutments. The role of piers is to support the bridge-span structure: abutment bearings not only support the bridge-span structure, but also connect with the embankment to prevent the embankment from sliding. In order to protect the platform and embankment filler, some protection and diversion works are often done on both sides of the platform.

Pier is divided into solid pier, column pier and bent pier. According to the plane shape, it can be divided into rectangular pier, pointed pier and circular pier. The materials of building piers can be wood, stone, concrete, reinforced concrete, steel and so on.

Extended data

According to the position of the bridge pier and the construction site, and according to the requirements of scaffolding, the bowl buckle frame is used to set up an operation outer frame as a platform for formwork lifting and worker operation. Scaffolding rises with formwork lifting, with the distance between vertical poles of 0.9m and the step distance of1.2m.

Before scaffolding, for the single-pile and single-column structure, in order to ensure the installation of composite pier formwork, it is necessary to dig up the reinforced concrete retaining wall, miscellaneous fill and concrete pavement around the pile top and transport them to the slag yard. The slope m is determined according to the site conditions.

In order to ensure the stability of the bowl-shaped support system, it is necessary to excavate to 0.2m below the elevation of the pile top and harden it with C20 concrete to the elevation of the pile top. The hardening width of pile foundation retaining wall is 0.4m. After the construction of the composite pier and capping beam is completed and the scaffold is dismantled, it will be backfilled and compacted by layers with miscellaneous fill, and the existing road part will be backfilled with C30 concrete.

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