| 摘要 |
906,263. Scaffolding in shafts. GUTEHOFFNUNGSHUTTE STERKRADE A.G. May 10, 1961 [May 12, 1960], No. 17091/61. Class 20 (2). [Also in Group XXI] In the installation of a shaft lining comprising a steel shell 1 formed of cylindrical sections and enclosing a concrete annulus 3, scaffolding 6 having platforms I ... VI and suspended on ropes 7 is used, a section being tack-welded at 8 to the next lower section from the platform V, the next lower section being welded at 9 to the shell already installed from the platform IV and work being done on the rest of the lining from lower platforms. Bitumen is poured between the shell and the shaft wall from the platform VI. During completion of the welds at 8, 9 a section of an inner shell 2 is welded to the outer shell above the section of the inner shell already installed, the platforms II, III being used. Gaps 11 left between the sections of the inner shell form drain holes which are also used to inject cement into the annulus using the platform I. |
