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Stability of clay at vertical openings
Laboratory experiments have shown that cohesive soil flows through vertical opening when total overburden pressure exceeds about six times undrained shear strength of soil at level of opening; field data collected from tunnels and pipes constructed in soft clays show that no difficulties have been encountered with soil flowing through openings in tunnel lining or through tunnel front when net overburden pressure has been less than six times undrained shear strength of soil; field data indicate that force required to push tunnel shield forward into cohesive soil corresponds to approximately sum of overburden pressure and six times undrained shear strength of soil.
Stability of clay at vertical openings
Laboratory experiments have shown that cohesive soil flows through vertical opening when total overburden pressure exceeds about six times undrained shear strength of soil at level of opening; field data collected from tunnels and pipes constructed in soft clays show that no difficulties have been encountered with soil flowing through openings in tunnel lining or through tunnel front when net overburden pressure has been less than six times undrained shear strength of soil; field data indicate that force required to push tunnel shield forward into cohesive soil corresponds to approximately sum of overburden pressure and six times undrained shear strength of soil.
Stability of clay at vertical openings
ASCE -- Proc (J Soil Mechanics Foundations Div)
Broms, B.B. (author) / Bennermark, H. (author)
1967
24 pages
Article (Journal)
English
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