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Behavior of braced excavation supported by panels of deep mixing columns
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.
Skanska Sverige AB.
Skanska Sverige AB.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-9615-4861
2016 (English)In: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010Article in journal (Refereed) Published
Abstract [en]

This paper describes the instrumentation, execution and performance of two full-scale tests where a braced steel sheet pile wall interacting with rows of overlapping dry deep mixing columns was excavated and then loaded to failure. The purpose of these tests was to provide knowledge of the behavior of deep mixing column rows located in passive zone and interacting with a retaining structure. Both tests were extensively instrumented on the active as well as on the passive side of the retaining structure. In both conducted tests a stability failure of the retaining structure occurred, resulting in heave at the bottom of the excavation and large settlements of the ground surface behind the sheet pile wall. For a spacing between LC-panels of 3.0 m a very brittle failure developed suddenly in the clay between the panels with small deformations prior to failure. In the second test, with a spacing of 1.5 m between LC-panels, the failure developed in the LC-panels as well as in the clay between the panels. Even if a similar failure mechanism developed, measured horizontal displacements, horizontal stresses, and pore pressure response prior to failure differed between the tests.

Place, publisher, year, edition, pages
NRC Research Press, 2016.
National Category
Geotechnical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-188805DOI: 10.1139/cgj-2016-0137OAI: oai:DiVA.org:kth-188805DiVA: diva2:939076
Note

QC 20160712

Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2016-07-12Bibliographically approved

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