Preparation of high capacity tensiometers for field application

A. Azizi; M. I. Lingwanda; D. L. Nyaoro; P. N. Hughes; D. G. Toll

Preparation of high capacity tensiometers for field application

A. Azizi, M. I. Lingwanda, D. L. Nyaoro, P. N. Hughes, D. G. Toll

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

Abstract

Monitoring suction variations within the construction materials of geotechnical infrastructure can provide essential information required to apply unsaturated soil mechanics to geotechnical problems related to climate risks. Such information can be useful in developing a strategy to mitigate climate risks at the design stage. Besides laboratory measurements, high capacity tensiometers can also be used for field measurements of suction. However, saturation, calibration, installation and long-term performance of these tensiometers need further consideration to ensure data accuracy. In this study, the response of tensiometers to pressurisation and cavitation cycles was investigated and the effect of the saturation time on the accuracy of the calibration was discussed. It was also found that temperature changes affect the tensiometer readings implying that temperature correction needs to be applied when tensiometers are installed in the field. A system was developed for field installation of tensiometers and measurement of suction in road subgrades. The installation system ensures occasional retrieving of the tensiometers when resaturation is required. The laboratory and field performances of the developed system showed that the accurate measurement of suction can be achieved.

Original language	English
Title of host publication	17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
Editors	Haraldur Sigursteinsson, Sigurour Erlingsson, Sigurour Erlingsson, Bjarni Bessason
Publisher	International Society for Soil Mechanics and Geotechnical Engineering
Number of pages	9
ISBN (Electronic)	9789935943613
Publication status	Published - 6 Sept 2019
Event	17th European Conference on Soil Mechanics and Geotechnical Engineering - Reykjavik, Iceland Duration: 1 Sept 2019 → 6 Sept 2019

Conference

Conference	17th European Conference on Soil Mechanics and Geotechnical Engineering
Abbreviated title	ECSMGE 2019
Country/Territory	Iceland
City	Reykjavik
Period	1/09/19 → 6/09/19

Keywords

Field installation
Low volume road
Suction
Tensiometer

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

https://www.issmge.org/publications/publication/preparation-of-high-capacity-tensiometers-for-field-application

Cite this

Azizi, A., Lingwanda, M. I., Nyaoro, D. L., Hughes, P. N., & Toll, D. G. (2019). Preparation of high capacity tensiometers for field application. In H. Sigursteinsson, S. Erlingsson, S. Erlingsson, & B. Bessason (Eds.), 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings Article 728 International Society for Soil Mechanics and Geotechnical Engineering. https://www.issmge.org/publications/publication/preparation-of-high-capacity-tensiometers-for-field-application

Azizi, A. ; Lingwanda, M. I. ; Nyaoro, D. L. et al. / Preparation of high capacity tensiometers for field application. 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings. editor / Haraldur Sigursteinsson ; Sigurour Erlingsson ; Sigurour Erlingsson ; Bjarni Bessason. International Society for Soil Mechanics and Geotechnical Engineering, 2019.

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title = "Preparation of high capacity tensiometers for field application",

abstract = "Monitoring suction variations within the construction materials of geotechnical infrastructure can provide essential information required to apply unsaturated soil mechanics to geotechnical problems related to climate risks. Such information can be useful in developing a strategy to mitigate climate risks at the design stage. Besides laboratory measurements, high capacity tensiometers can also be used for field measurements of suction. However, saturation, calibration, installation and long-term performance of these tensiometers need further consideration to ensure data accuracy. In this study, the response of tensiometers to pressurisation and cavitation cycles was investigated and the effect of the saturation time on the accuracy of the calibration was discussed. It was also found that temperature changes affect the tensiometer readings implying that temperature correction needs to be applied when tensiometers are installed in the field. A system was developed for field installation of tensiometers and measurement of suction in road subgrades. The installation system ensures occasional retrieving of the tensiometers when resaturation is required. The laboratory and field performances of the developed system showed that the accurate measurement of suction can be achieved.",

keywords = "Field installation, Low volume road, Suction, Tensiometer",

author = "A. Azizi and Lingwanda, {M. I.} and Nyaoro, {D. L.} and Hughes, {P. N.} and Toll, {D. G.}",

note = "DOI not working - 10.32075/17ECSMGE-2019-0728 ; 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 ; Conference date: 01-09-2019 Through 06-09-2019",

year = "2019",

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language = "English",

editor = "Haraldur Sigursteinsson and Sigurour Erlingsson and Sigurour Erlingsson and Bjarni Bessason",

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Azizi, A, Lingwanda, MI, Nyaoro, DL, Hughes, PN & Toll, DG 2019, Preparation of high capacity tensiometers for field application. in H Sigursteinsson, S Erlingsson, S Erlingsson & B Bessason (eds), 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings., 728, International Society for Soil Mechanics and Geotechnical Engineering, 17th European Conference on Soil Mechanics and Geotechnical Engineering, Reykjavik, Iceland, 1/09/19. <https://www.issmge.org/publications/publication/preparation-of-high-capacity-tensiometers-for-field-application>

Preparation of high capacity tensiometers for field application. / Azizi, A.; Lingwanda, M. I.; Nyaoro, D. L. et al.
17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings. ed. / Haraldur Sigursteinsson; Sigurour Erlingsson; Sigurour Erlingsson; Bjarni Bessason. International Society for Soil Mechanics and Geotechnical Engineering, 2019. 728.

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

TY - GEN

T1 - Preparation of high capacity tensiometers for field application

AU - Azizi, A.

AU - Lingwanda, M. I.

AU - Nyaoro, D. L.

AU - Hughes, P. N.

AU - Toll, D. G.

N1 - DOI not working - 10.32075/17ECSMGE-2019-0728

PY - 2019/9/6

Y1 - 2019/9/6

N2 - Monitoring suction variations within the construction materials of geotechnical infrastructure can provide essential information required to apply unsaturated soil mechanics to geotechnical problems related to climate risks. Such information can be useful in developing a strategy to mitigate climate risks at the design stage. Besides laboratory measurements, high capacity tensiometers can also be used for field measurements of suction. However, saturation, calibration, installation and long-term performance of these tensiometers need further consideration to ensure data accuracy. In this study, the response of tensiometers to pressurisation and cavitation cycles was investigated and the effect of the saturation time on the accuracy of the calibration was discussed. It was also found that temperature changes affect the tensiometer readings implying that temperature correction needs to be applied when tensiometers are installed in the field. A system was developed for field installation of tensiometers and measurement of suction in road subgrades. The installation system ensures occasional retrieving of the tensiometers when resaturation is required. The laboratory and field performances of the developed system showed that the accurate measurement of suction can be achieved.

AB - Monitoring suction variations within the construction materials of geotechnical infrastructure can provide essential information required to apply unsaturated soil mechanics to geotechnical problems related to climate risks. Such information can be useful in developing a strategy to mitigate climate risks at the design stage. Besides laboratory measurements, high capacity tensiometers can also be used for field measurements of suction. However, saturation, calibration, installation and long-term performance of these tensiometers need further consideration to ensure data accuracy. In this study, the response of tensiometers to pressurisation and cavitation cycles was investigated and the effect of the saturation time on the accuracy of the calibration was discussed. It was also found that temperature changes affect the tensiometer readings implying that temperature correction needs to be applied when tensiometers are installed in the field. A system was developed for field installation of tensiometers and measurement of suction in road subgrades. The installation system ensures occasional retrieving of the tensiometers when resaturation is required. The laboratory and field performances of the developed system showed that the accurate measurement of suction can be achieved.

KW - Field installation

KW - Low volume road

KW - Suction

KW - Tensiometer

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UR - https://www.ecsmge-2019.com/key-dates.html

M3 - Conference contribution

AN - SCOPUS:85111936342

BT - 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings

A2 - Sigursteinsson, Haraldur

A2 - Erlingsson, Sigurour

A2 - Bessason, Bjarni

PB - International Society for Soil Mechanics and Geotechnical Engineering

T2 - 17th European Conference on Soil Mechanics and Geotechnical Engineering

Y2 - 1 September 2019 through 6 September 2019

ER -

Preparation of high capacity tensiometers for field application

Abstract

Conference

Keywords

UN SDGs

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