A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Stresses and Displacements Induced in Rock by Tunnel Boring Machine Props
The Bureau of Mines presents a theoretical solution for the stresses and displacements in an infinite elastic plate containing a circular hole whose boundary is subjected to applied shear loads over four separated arcs. The results for the applied shear loads can be superimposed on the results for applied radial loads, given in a previous publication, to obtain a complete two-dimensional approximation of the stresses and displacements induced in the rock by tunnel boring machines anchored in a circular tunnel by means of four props. Analysis of the various solutions shows that the tangential tensile stresses induced on the boundary of the circular tunnel by applied radial loads can be minimized in the roof and floor of the tunnel by the application of appropriate shear loads to each of the four props. Thus when planning tunnel boring operations, consideration should be given to the in situ stress field in the rock and the induced stresses in the rock resulting from the applied radial and shear loads produced by the props of the boring machine. (Author)
Stresses and Displacements Induced in Rock by Tunnel Boring Machine Props
The Bureau of Mines presents a theoretical solution for the stresses and displacements in an infinite elastic plate containing a circular hole whose boundary is subjected to applied shear loads over four separated arcs. The results for the applied shear loads can be superimposed on the results for applied radial loads, given in a previous publication, to obtain a complete two-dimensional approximation of the stresses and displacements induced in the rock by tunnel boring machines anchored in a circular tunnel by means of four props. Analysis of the various solutions shows that the tangential tensile stresses induced on the boundary of the circular tunnel by applied radial loads can be minimized in the roof and floor of the tunnel by the application of appropriate shear loads to each of the four props. Thus when planning tunnel boring operations, consideration should be given to the in situ stress field in the rock and the induced stresses in the rock resulting from the applied radial and shear loads produced by the props of the boring machine. (Author)
Stresses and Displacements Induced in Rock by Tunnel Boring Machine Props
W. I. Duvall (author) / W. Blake (author)
1968
34 pages
Report
No indication
English
Geology & Geophysics , Structural Mechanics , Rock(Geology) , Stresses , Underground structures , Drills , Loading(Mechanics) , Drilling , Tensile properties , Walls , Roofs , Supports , Mathematical analysis , Functions , Integration , Compressive properties , Programming(Computers) , Hydraulic jacks , Pressure , In situ stresses , Tunnel boring
Stresses and displacements induced in rock by tunnel boring machine props
| Engineering Index Backfile | 1968
Tunnel boring machine performance in sedimentary rock
| TIBKAT | 1983
Hard rock tunnel boring machine technical definition
| British Library Conference Proceedings | 1992
TIBKAT | 1983