Zahme Gera
Project
Bridge Zahme Gera
Motorway A71
View of Y-Pier during construct.
Total View
Y-Pier
Final Connection of Bridge Span
View of Abutment
Client
DEGES-Deutsche Einheit
Fernstrassenplanungs- und -Bau GmbH, Berlin
Facts
Vaulted box section with rigid Y-piers
Build by cantilevering
Length: 520 m
Width: 14.25 m (North)
14.65 m (South)
Pier distances: 115 - 145 - 145 - 115 m
Surface: 14,820 mē
Height: approx. 65 m above ground
Description
The „Zahme Gera“ bridge takes the A 71 motorway across the 65 m deep valley of the Zahme Gera river.
The Y-shaped piers were constructed using climbing scaffolding. In order to be able to construct the
diagonal pier parts a special type of self-climbing, self-supporting scaffolding was developed.
The bridge deck consists of two longitudinal, partially pre-stressed box sections. The structural height of
the bridge deck varies between 3.80 m at mid-distance between the piers and 6.70 m above the Y-piers. (The
longitudinal pre-stressing was achieved with internal and external pre- tensioned cables.)
The realisation of the bridge deck was achieved using a cantilevered construction method, respectively starting
from the piers at axis 20, 30 and 40. The construction progressed at intervals with a maximum of 5.0 m.
The calculations required a detailed consideration of all building phases.