... and external water pressure is analyzed by the three-dimensional finite element method. The optimization of concrete lining is carried out to reduce the lining thickness. Under the condition that the quality of backfill grouting is ensured to form a combined bearing body, the combined bearing is smaller than...

... are less than predicted by the plane strain solution. Upstream Oil & Gas Thickness lining design lining pressure Reservoir Characterization compression strength concrete shaft lining design 3032-ft depth lining thickness concrete lining reservoir geomechanics strength prediction...

... pressure, meridional and hoop stresses are practically uniform throughout the thickness of the lining. Reservoir Characterization temporary support system concrete lining Thickness element analysis tensile stress excavation construction reservoir geomechanics discontinuity lining rock...

... government Thickness computer estimate Reservoir Characterization Upstream Oil & Gas criteria tunnel-shaft system reservoir geomechanics strength Rock mechanics dimension rock bolt lining thickness concrete lining circular tunnel lining RQD designation contractor shaft tunnel...