Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The patent describes a flexible shielf for protecting excavating activities in a tunnel from roof falls which is made mobile by its drivable underlying support structure. Double acting hydraulic jacks, which are retained upright by pivotal and flexible members in each section of a train of sections comprising the support structure, underpin the flexible shield, and are operable to alternately apply the flexible shield in close proximity to the tunnel roof and maintain it free from engagement with the roof to facilitate its displacement along the tunnel with the support structure. A webbing of interlaced straps which take shape within edge supporting cables form panels corresponding to the sections, and these panels are integrated by nonrigid connections at the jack structures to make a canopy arrangement constituting the flexible shield.
The patent describes a flexible shielf for protecting excavating activities in a tunnel from roof falls which is made mobile by its drivable underlying support structure. Double acting hydraulic jacks, which are retained upright by pivotal and flexible members in each section of a train of sections comprising the support structure, underpin the flexible shield, and are operable to alternately apply the flexible shield in close proximity to the tunnel roof and maintain it free from engagement with the roof to facilitate its displacement along the tunnel with the support structure. A webbing of interlaced straps which take shape within edge supporting cables form panels corresponding to the sections, and these panels are integrated by nonrigid connections at the jack structures to make a canopy arrangement constituting the flexible shield.
Mobile Roof Supporting Shield
A. L. Barrett (Autor:in)
1973
11 pages
Report
Keine Angabe
Englisch
| NTIS | 1973