The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 1977
Filed:
Dec. 10, 1975
Hans Jutte, Dortmund-Brechten, DT;
Siegmund Babendererde, Munich, DT;
Reinhard Bokemeyer, Bad Vilbel, DT;
Adolf Foik, Offenbach, DT;
Gewerkschaft Eisenhutte Westfalia, Wethmar near Lunen, DT;
Hochtief AG, Frankfurt, DT;
Abstract
A tunnel driving apparatus and method which utilizes a drive shield preferably composed of a series of cutter planks arranged side-by-side around the tunnel axis and supported by a frame. The shield is advanced in relation to the frame by displacing the individual planks, and the frame is subsequently drawn up by means of hydraulic rams. To support the rear section of the tunnel wall a rear shield is provided which is connected to the frame preferably through further rams. This shield is a shaped sheet metal structure open towards the floor and contacting the tunnel wall over the roof and sides. In performing the method, lining elements of circular or arcuate form are installed inside the rear shield prior to its shifting up. These elements can be disposed on a floor lining constructed in situ. As the rear shield is moved up fluid concrete is sprayed or otherwise introduced over the exposed tunnel wall in one or more layers to consolidate the lining elements into the support lining thus formed.