A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Surface shaft plumbs depths to buried tunnel
By means of delicate, pinpoint boring operation, severe water conditions were successfully overcome in drilling vertical shaft through 115 ft of earth and rock into crown of existing tunnel; equipment used to penetrate tunnel without fracturing it and inundating it with muck-filled water included hollow Kelly bar circulating air to lift cuttings out of hole, and special "shoe" precast in casing to place grout.
Surface shaft plumbs depths to buried tunnel
By means of delicate, pinpoint boring operation, severe water conditions were successfully overcome in drilling vertical shaft through 115 ft of earth and rock into crown of existing tunnel; equipment used to penetrate tunnel without fracturing it and inundating it with muck-filled water included hollow Kelly bar circulating air to lift cuttings out of hole, and special "shoe" precast in casing to place grout.
Surface shaft plumbs depths to buried tunnel
Construction Methods Equipment
1967
3 pages
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Statistically-Based Tolerances of Steel Frame Columns Out-Of-Plumbs
| SAGE Publications | 2013
The petition : at the sign of the fox and sour plumbs
TIBKAT | 1800
The petition : at the sign of the fox and sour plumbs
UB Braunschweig | 1800
Statistically-Based Tolerances of Steel Frame Columns Out-of-Plumbs
| Online Contents | 2013