ABSTRACT
A shutter is a transportable, mobile formwork unit for manufacturing reinforced concrete components which have a constant profile over long distances. They are used in both conventional and mechanized tunneling for secondary lining. These are for example concrete secondary linings and walls of tunnels or long continuous roadway girders for bridges. In conventional tunnel construction, two types of shutters are used and two ways of concreting are established. To manufacture the secondary lining it is possible to concrete “in a sequence” or “in a gap”. The processes are characterized by a low degree of digitalization and automation. The paper outlines the development of an automated measuring system to speed up the setup of shutters and reduce associated labor costs. Prototype systems are currently being used on vault shutters and full round shutters in Germany, Poland, England and Australia to gather experience on benefits in terms of time and labor savings and possible improvements. Based on the use of the positioning system, there has been also a discussion about the possibility for use of real-time capture of production data in the field. The results demonstrate that the system can realize a reduction of the surveying time and enables monitoring of the shutter position during the pouring and curing process.
