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| PASCHAL's elements for the escape tunnel in Vienna  The reconstruction measures at the central station in Vienna are currently among the largest construction projects in Austria's metropolis. In December 2012, the central station will be brought into service partially. The completion of the entire railway infrastructure project is scheduled for 2015. In the course of this gigantic construction measure, PASCHAL from Steinach, the formwork specialist won the bid for the construction of the escape tunnel in the "Lainzer Tunnel" construction segment. All in all, 375 m² of Circular Trapezoidal Girder Formwork with steel face (TTS) were used. The waler line has been produced as a special project only for this construction site. For the elevator shaft, PASCHAL has delivered a total of 158 m² of Logo wall formwork with element sizes 270 and 135. During the construction of the security tunnel, the inner shell which has stairs all around had to be brought up together with the elevator shaft. "PASCHAL was capable of delivering a system which met these demands, " said Albin Matchek, project foreman. The three shafts - Markwardstiege, Himmelhof as well as Angermayergasse - with heights of 45 m, 75 m and 54 m respectively were enlarged from top to bottom to a diameter of 9 m. Subsequently, the circular formwork was placed in quarter circles. Several demanding factors played a role. "Therefore, we had to proceed with caution. Concreting was then done completely in each case", the foreman explained. For each shaft, about 6630 tonnes of concrete were used. The constructional feed was done in phases of 2.50 m. Matschek: "One could see that the usage of TTS was a good decision. During dismantling and forming, we did not need to do any reworking or readjustment on the elements. Even after being used about 140 times, no alteration of the formwork facing was necessary. This saved us a lot of labour costs." Additionally, accuracy when dealing with projects of this height was also an important factor. A deviation of plus/minus 1 cm on a height of 75 m was simply remarkable. However, it is not just proper materials that are responsible for good results but also perfect planning. write your comments about the article :: © 2010 Construction News :: home page |