In Situ Tests Aid Design of a Cylinder Pile Wall

by Allen B. Gifford, Shannon & Wilson Inc, Seattle, WA, USA,
Gordon E. Green, Shannon & Wilson Inc, Seattle, WA, USA,
Gerard J. Buechel, Shannon & Wilson Inc, Seattle, WA, USA,
Alexander I. Feldman, Shannon & Wilson Inc, Seattle, WA, USA,



Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering

Abstract: In situ testing was used to verify geotechnical design parameters and modify construction for a 22 million dollar slope stabilization project near a major highway interchange. The project included constructing a 40-foot-high, 1,100-foot-long large diameter cylinder pile wall. An 800 ton tendon, anchors each cylinder pile to a deadman located in a rock tunnel driven parallel and behind the wall. Shear strength, modulus, and bearing capacity of soil and claystone were reevaluated early during construction on the basis of results from large-scale in situ testing. Design and construction were modified to take advantage of increased modulus and deal with lower measured shear strength.

Subject Headings: Pile tests | Cylinders | Soil modulus | Shear strength | Soil tests | Shear modulus | Soil strength

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