Innovative solutions for driving cross passages in bored tunnels with segmental lining / Innovative Lösungen zum Auffahren von Querschlägen maschinell hergestellter Tunnel mit Tübbingauskleidung

Construction time and project risks in mechanized tunnelling are determined to a great extent by the number and difficulty of the cross passages and emergency exits. This article presents innovative solutions that lead to more flexibility in ground freezing measures, enable a high-quality watertight connection between the cross passage and the running tunnels and permit the simple coupling of segments under high overburden pressures. Either experience from completed projects or results of tests on construction elements is available for the proposed solutions.