A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
New shields speed tunneling through sand
Driving of 12 ft horseshoe tunnel at 24-hr rates as high as 153 ft for single heading in Los Angeles, Calif; job is part of North Central outfall sewer and includes two major tunnels, longest being 6700 ft; shield permits installation of 2×8 in. lagging placed solidly around tunnel arch; shield has six hydraulic jacks that inch it forward as material is dug out at heading.
New shields speed tunneling through sand
Driving of 12 ft horseshoe tunnel at 24-hr rates as high as 153 ft for single heading in Los Angeles, Calif; job is part of North Central outfall sewer and includes two major tunnels, longest being 6700 ft; shield permits installation of 2×8 in. lagging placed solidly around tunnel arch; shield has six hydraulic jacks that inch it forward as material is dug out at heading.
New shields speed tunneling through sand
Eng News-Rec
Engineering News-Record ; 158
1957
3 pages
Article (Journal)
English
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Engineering Index Backfile | 1900
Engineering Index Backfile | 1901
| Wiley | 2012