Bauer's tunnel walls

摘要

Work on the largest construction site in Munich, Germany, has been completed after an eight-year construction period, and one of the companies involved in the 2.5km tunnel in the Luise-Kiesselbach-Platz area in the southwest of the city was Bauer Spezialtiefbau. The company was commissioned as part of a joint venture for the execution of the specialist foundation engineering work for the tunnel and also with the construction of an approximately 400m trough area with ramp structures. The total cost of the project was €398.5 million. Bauer began construction of the tunnel in mid-2009, using the top-down method. For the Luise-Kiesselbach-Platz area, open-cut tunnelling was used. The walls of the tunnel consist of secant bored piles, and up to 21 m deep excavations were necessary for the operating stations and emergency exits.