Novel Approach for Health Monitoring of Earthen Embankments

Utili, Stefano; Castellanza, Riccardo; Galli, Andrea; Sentenac, P.

doi:10.1061/(asce)gt.1943-5606.0001215

Cited by 25 publications

(15 citation statements)

References 24 publications

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“…TDR has recently been used to monitor earth structures such as levees in controlled experiments and in real field case studies (Scheuermann et al 2009;Utili et al 2015;Janik et al 2017). Estimating the degree of saturation (S r ) would be very beneficial as this parameter is directly linked to the stability of earth structures and could be used to trigger warnings (Valentino et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Estimating the degree of saturation (S r ) would be very beneficial as this parameter is directly linked to the stability of earth structures and could be used to trigger warnings (Valentino et al 2011). Measuring the soil parameters remotely from buried sensors would clearly be advantageous and reduce the current reliance on the visual qualitative inspections conducted by inspection engineers (Utili et al 2015). Studies using electrical resistivity tomography (ERT) have shown the potential of using and S r for monitoring the condition of ageing embankments and have suggested that these parameters can be used for a more effective management of geotechnical assets Gunn et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Time domain reflectometry (TDR) potential for soil condition monitoring of geotechnical assets

et al. 2019

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The performance of geotechnical assets is influenced by various external factors including time and changing loading and environmental conditions. These changes could reduce the asset’s ability to maintain its function, potentially resulting in failure, which could be extremely disruptive and expensive to remediate; thus, the ability to monitor the long-term condition of the ground is clearly desirable as this could function as an early-warning system, permitting intervention prior to failure. This study demonstrates, for the first time, the potential of using time domain reflectometry (TDR) for long-term monitoring of the relative health of an asset (via water content and dry density) in a field trial where a clayey sandy silt was exposed to leaking water from a pipe. TDR sensors were able to provide detailed information on the variation in the soil conditions and detect abrupt changes that would relay a prompt for asset inspections or interventions. It is proposed that TDR could be used alone or together with other shallow geophysical techniques for long-term condition monitoring of critical geotechnical assets. Early-warning systems could be based on thresholds defined from the values or the relative change of the measured parameters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Time domain reflectometry (TDR) potential for soil condition monitoring of geotechnical assets

et al. 2019

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“…To this end, the locations of the cracks (problem iii ) are prescribed in the search for the most unfavourable failure mechanism. These maps can be employed for two purposes: ( i ) in the case of earth structures prone to fissuring, as for instance flood defence embankments , they may help inspection engineers to reduce significantly the extension of the zones to be inspected by excluding the zones where cracks have no detrimental effect on slope stability; ( ii ) when the presence of one or more cracks in a slope is known, the maps tell the geotechnical engineer whether the crack may be discarded from the stability analysis of the slope.…”

Section: Introductionmentioning

confidence: 99%

On the stability of fissured slopes subject to seismic action

Utili

Hasan

2016

Num Anal Meth Geomechanics

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SUMMARYA set of analytical solutions achieved by the upper bound theorem of limit analysis and the pseudo-static approach is presented for the assessment of the stability of homogeneous c, ϕ slopes manifesting vertical cracks and subject to seismic action. Rotational failure mechanisms are considered for slopes with cracks of either known or unknown depth and location. A validation exercise was carried out based on numerical limit analyses and displacement-based finite-element analyses with strength reduction technique.Charts providing the stability factor for fissured slopes subject to both horizontal and vertical accelerations for any combination of c, ϕ and slope inclination are provided. The effect of the direction of the vertical acceleration on slope stability is specifically analysed. Yield seismic coefficients are also provided.When the presence of cracks within the slope can be ascertained with reasonable confidence, maps showing the zones within the slope where they have no destabilising effect are provided.Finally, Newmark's method was employed to assess the effect of cracks on earthquake induced displacements. To this end, displacement coefficients are provided in chart form as a function of the slope characteristics. Two examples of slopes subjected to known earthquakes are illustrated.

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“…These are only indicative, and may vary considerably for the wide range of possible sites and geology that could fall into each category. Utili et al (2015) described the use of monitoring information to consider the stability of longer lengths of asset. An overview for consideration of slopes at the corridor scale has been given by Dijkstra et al (2014) (continued) (Chambers et al 2011) and Nafferton embankment, Northumberland, UK (Glendinning et al 2014) are being used to assess the performance of new monitoring instruments and techniques.…”

Section: What To Monitormentioning

confidence: 99%

Current and future role of instrumentation and monitoring in the performance of transport infrastructure slopes

Smethurst

Smith

Uhlemann

et al. 2017

QJEGH

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Instrumentation is often used to monitor the performance of engineered infrastructure slopes. This paper looks at the current role of instrumentation and monitoring, including the reasons for monitoring infrastructure slopes, the instrumentation typically installed and parameters measured. The paper then investigates recent developments in technology and considers how these may change the way that monitoring is used in the future, and tries to summarize the barriers and challenges to greater use of instrumentation in slope engineering. The challenges relate to economics of instrumentation within a wider risk management system, a better understanding of the way in which slopes perform and/or lose performance, and the complexities of managing and making decisions from greater quantities of data.

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Novel Approach for Health Monitoring of Earthen Embankments

Cited by 25 publications

References 24 publications

Time domain reflectometry (TDR) potential for soil condition monitoring of geotechnical assets

Time domain reflectometry (TDR) potential for soil condition monitoring of geotechnical assets

On the stability of fissured slopes subject to seismic action

Current and future role of instrumentation and monitoring in the performance of transport infrastructure slopes

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