Testing of self-drilled hollow bar soil nails

Fraser Lindsay; Slobodan Mickovski; Martyn Smith

doi:10.1680/ecsmge.60678

Testing of self-drilled hollow bar soil nails

Fraser Lindsay, Slobodan Mickovski, Martyn Smith

Civil Engineering and Environmental Management

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

179 Downloads (Pure)

Abstract

Current standards and best practice guidance recognise that testing of self-drilled soil nails can be problematic as conventional packers and debonded lengths cannot be constructed. As a result, this provides difficulty in testing and confirming the ultimate bond resistance within the passive zone of a soil nailed slope, and thus the soil nail lengths determined within the design. This paper provides a summary and review of the various testing procedures adopted for a recent soil nail construction project in Scotland. Approximately 1,500
self-drilled hollow bar soil nails were installed to depths between 7 m and 24 m to stabilise a 40 m high coastal slope with a history of instability.
Fifty six sacrificial test nails were installed and tested at the site by various methods to validate the soil nail lengths determined within the design. These methods, the associated construction issues and design assumptions, and the subsequent test results have been discussed in this paper.

Original language	English
Title of host publication	Proceedings of the XVI ECSMGE Geotechnical Engineering for Infrastructure and Development Conference
Publisher	ICE Publishing
Pages	2969-2974
Number of pages	6
ISBN (Print)	9780727760678
DOIs	https://doi.org/10.1680/ecsmge.60678
Publication status	Published - 2015

Keywords

environmental engineering
hollow bar soil nails

Documents and Links

10.1680/ecsmge.60678

Lindsay, F. et al (2015) Testing of self-drilled hollow bar soil nails
Copyright © The authors and ICE Publishing 2015
Final published version, 1.25 MB

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Lindsay, F., Mickovski, S., & Smith, M. (2015). Testing of self-drilled hollow bar soil nails. In Proceedings of the XVI ECSMGE Geotechnical Engineering for Infrastructure and Development Conference (pp. 2969-2974). ICE Publishing. https://doi.org/10.1680/ecsmge.60678

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abstract = "Current standards and best practice guidance recognise that testing of self-drilled soil nails can be problematic as conventional packers and debonded lengths cannot be constructed. As a result, this provides difficulty in testing and confirming the ultimate bond resistance within the passive zone of a soil nailed slope, and thus the soil nail lengths determined within the design. This paper provides a summary and review of the various testing procedures adopted for a recent soil nail construction project in Scotland. Approximately 1,500self-drilled hollow bar soil nails were installed to depths between 7 m and 24 m to stabilise a 40 m high coastal slope with a history of instability.Fifty six sacrificial test nails were installed and tested at the site by various methods to validate the soil nail lengths determined within the design. These methods, the associated construction issues and design assumptions, and the subsequent test results have been discussed in this paper.",

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AB - Current standards and best practice guidance recognise that testing of self-drilled soil nails can be problematic as conventional packers and debonded lengths cannot be constructed. As a result, this provides difficulty in testing and confirming the ultimate bond resistance within the passive zone of a soil nailed slope, and thus the soil nail lengths determined within the design. This paper provides a summary and review of the various testing procedures adopted for a recent soil nail construction project in Scotland. Approximately 1,500self-drilled hollow bar soil nails were installed to depths between 7 m and 24 m to stabilise a 40 m high coastal slope with a history of instability.Fifty six sacrificial test nails were installed and tested at the site by various methods to validate the soil nail lengths determined within the design. These methods, the associated construction issues and design assumptions, and the subsequent test results have been discussed in this paper.

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