Physical Modelling in Geotechnics 2018
DOI: 10.1201/9780429438646-79
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Centrifuge modelling of remediation of liquefaction-induced pipeline uplift using model root systems

Abstract: Buried pipelines are susceptible to floatation within liquefiable soil after earthquakes. When soil liquefies, its shear strength is significantly reduced due to generation of excess pore pressure. A buried pipeline within such soil can then uplift due to a combination of (i) an upwards pore pressure gradient across the pipe and (ii) the resisting force contributed from soil shear strength being significantly reduced. Roots have been confirmed to increase the shear resistance of soil, so they can potentially b… Show more

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Cited by 8 publications
(4 citation statements)
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“…The sand used for testing was HST95 Congleton silica sand (Al-Defae et al, 2013;Wang et al 2018). The average grain size, đť‘śđť‘ś 50 (i.e., particle diameter of 50% passing), was 0.13 mm.…”
Section: Test Soil and Model Preparationmentioning
confidence: 99%
“…The sand used for testing was HST95 Congleton silica sand (Al-Defae et al, 2013;Wang et al 2018). The average grain size, đť‘śđť‘ś 50 (i.e., particle diameter of 50% passing), was 0.13 mm.…”
Section: Test Soil and Model Preparationmentioning
confidence: 99%
“…Regarding the cyclic behaviour of rooted soil, no study on the element behaviour can be found in the literature. There are published works, however, showing that plant roots can improve (i) the seismic slope performance (Liang and Knappett 2017;Liang et al 2020) and (ii) the uplifting potential (flotation) of buried pipelines against earthquakes (Wang et al 2018). These studies, though, used 3-D printed root analogues instead of real roots for testing in a geotechnical centrifuge.…”
Section: R a F Tmentioning
confidence: 99%
“…Soil bioengineering using vegetation is considered as an environmentally and ecologically friendly bio-remediation technique for resisting shallow soil slope failure against rainfall (Stokes et al 2014;Ni et al 2019;Switala and Wu 2018), earthquakes (Liang and Knappett 2017;Liang et al 2020;Tanaka et al 2021), and also for mediating the floatation of buried pipelines due to liquefaction (Wang et al 2018).…”
Section: Introductionmentioning
confidence: 99%
“…The resistance to uplift is of critical importance during earthquakes or when large ground movements occur such as in a landslide. Wang et al (2018) present a novel solution to the problem of uplift during earthquakes which is to strengthen the soil overlying the pipeline with vegetation. Model plant roots were created using a 3D printer and used to strengthen the soil in the upper layer of their experimental model.…”
Section: Pipelinesmentioning
confidence: 99%