Method and device for carrying out shield tunnelling while maintaining pressure in the working excavation (district) in particular for the purpose of erecting tunnel works

摘要

The invention relates to a method for carrying out shield tunnelling while maintaining pressure in the working excavation, in particular for erecting tunnel works. The excavated material is guided through a valve member between the pressurised working excavation and the rear space, which is at atmospheric pressure. The invention further relates to a device for carrying out this method, which is characterised in that the valve member consists of at least one spear valve or flap valve arranged in the pressure wall. The valve member preferably has a restoring force. IMAGE