- Title
- Suction effects during uplift of steel pipes buried in compacted soil
- Creator
- Wu, Jinbiao; Kouretzis, George; Pineda, Jubert; Ouyang, Kaiwen
- Relation
- ARC.DP180103497 http://purl.org/au-research/grants/arc/DP180103497
- Relation
- Acta Geotechnica Vol. 18, p. 2117-2139
- Publisher Link
- http://dx.doi.org/10.1007/s11440-022-01710-6
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2023
- Description
- This paper presents an experimental study on quantifying the effects of soil suction on the resistance offered by compacted unsaturated backfills to uplift of buried steel pipes and identifying the mechanisms that contribute to increased resistance compared to similar pipes buried in dry sand. This is achieved by means of 1-g physical model experiments, with the pipe buried in sandy loam–Kaolin soil beds of varying water content (suction), compacted to the same dry unit weight. The main experiments are supplemented by benchmarking experiments performed in dry sand of similar grain size distribution, as well as in compacted soil beds inundated with water to achieve conditions close to full saturation. The experiments are supported by a detailed characterisation study of compacted sandy loam–Kaolin mixtures and mini-CPT tests performed to evaluate the uniformity of the soil beds. Measurements of the reaction developing on the pipe as function of its uplift displacement are co-evaluated together with images of the failure mechanisms obtained using particle image velocimetry and continuous measurements of soil matrix suction. We conclude with a simplified method to predict the peak reaction to pipe uplift that allows considering the contribution of suction and the tensile–shear failure mechanism observed during the experiments.
- Subject
- matrix suction; models (physical); pipes and pipelines; soil
- Identifier
- http://hdl.handle.net/1959.13/1480785
- Identifier
- uon:50564
- Identifier
- ISSN:1861-1125
- Rights
- © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
- Language
- eng
- Full Text
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