All Outputs (196)

Advanced analysis of satellite data reveals ground deformation precursors to the Brumadinho Tailings Dam collapse (2021)
Journal Article
Grebby, S., Sowter, A., Gluyas, J., Toll, D., Gee, D., Athab, A., & Girindran, R. (2021). Advanced analysis of satellite data reveals ground deformation precursors to the Brumadinho Tailings Dam collapse. Communications Earth & Environment, 2, Article 2. https://doi.org/10.1038/s43247-020-00079-2

Catastrophic failure of a tailings dam at an iron ore mine complex in Brumadinho, Brazil, on 25th January 2019 released 11.7 million m3 of tailings downstream. Although reportedly monitored using an array of geotechnical techniques, the collapse occu... Read More about Advanced analysis of satellite data reveals ground deformation precursors to the Brumadinho Tailings Dam collapse.

Weather-driven deterioration processes affecting the performance of embankment slopes (2020)
Journal Article
Stirling, R., Toll, D., Glendinning, S., Helm, P., Yildiz, A., Hughes, P., & Asquith, J. (2021). Weather-driven deterioration processes affecting the performance of embankment slopes. Géotechnique, 71(11), 957-969. https://doi.org/10.1680/jgeot.19.sip.038

Deterioration of earthworks and the resultant implications for serviceability and increased occurrence of failures have a significant negative impact on transport networks both in the UK and internationally. There is evidence in the field that deteri... Read More about Weather-driven deterioration processes affecting the performance of embankment slopes.

Field monitoring of soil-moisture to understand the hydrological response of a road-cut slope (2020)
Book Chapter
Pradhan, S., Toll, D., Rosser, N., & Brain, M. (2020). Field monitoring of soil-moisture to understand the hydrological response of a road-cut slope. In R. Cardoso, C. Jommi, & E. Romero (Eds.), 4th European Conference on Unsaturated Soils (E-UNSAT 2020). EDP Sciences. https://doi.org/10.1051/e3sconf/202019501029

Rainfall and slope-cutting for road construction are two key landslide causative factors in Nepal, but how they interact to cause failures is poorly understood. To improve understanding of the effects of cut slopes during rainfall, geotechnical inves... Read More about Field monitoring of soil-moisture to understand the hydrological response of a road-cut slope.

Experimental, numerical and field study investigating a heritage structure collapse after the 2015 Gorkha earthquake (2020)
Journal Article
Kumar, A., Hughes, P. N., Sarhosis, V., Toll, D., Wilkinson, S., Coningham, R., Acharya, K. P., Weise, K., Joshi, A., Davis, C., Kunwar, R. B., & Maskey, P. N. (2020). Experimental, numerical and field study investigating a heritage structure collapse after the 2015 Gorkha earthquake. Natural Hazards, 101(1), 231-253. https://doi.org/10.1007/s11069-020-03871-7

This paper presents an investigation of the collapse of a 325-year-old multi-tiered heritage temple during the 2015 Gorkha earthquake in Kathmandu, Nepal. The research comprises a reconnaissance survey followed by a geotechnical investigation and num... Read More about Experimental, numerical and field study investigating a heritage structure collapse after the 2015 Gorkha earthquake.

Identifying archaeological evidence of past earthquakes in a contemporary disaster scenario: Case-studies of damage, resilience and risk reduction from the 2015 Gorkha Earthquake and past seismic events within the Kathmandu Valley UNESCO World Heritage Property (Nepal) (2019)
Journal Article
Davis, C., Coningham, R., Acharya, K., Kunwar, R., Forlin, P., Weise, K., Maskey, P., Joshi, A., Simpson, I., Toll, D., Wilkinson, S., Hughes, P., Sarhosis, V., Kumar, A., & Schmidt, A. (2020). Identifying archaeological evidence of past earthquakes in a contemporary disaster scenario: Case-studies of damage, resilience and risk reduction from the 2015 Gorkha Earthquake and past seismic events within the Kathmandu Valley UNESCO World Heritage Property (Nepal). Journal of Seismology, 24(4), 729-751. https://doi.org/10.1007/s10950-019-09890-7

The 2015 Gorkha Earthquake was a humanitarian disaster but also a cultural catastrophe that damaged and destroyed historic monuments across Nepal, including those within the Kathmandu Valley UNESCO World Heritage Property. In the rush to rebuild, tra... Read More about Identifying archaeological evidence of past earthquakes in a contemporary disaster scenario: Case-studies of damage, resilience and risk reduction from the 2015 Gorkha Earthquake and past seismic events within the Kathmandu Valley UNESCO World Heritage Property (Nepal).

Reducing Disaster Risk to Life and Livelihoods by Evaluating the Seismic Safety of Kathmandu’s Historic Urban Infrastructure: enabling an interdisciplinary pilot (2019)
Journal Article
Coningham, R., Acharya, K., Barclay, C., Barclay, R., Davis, C., Graham, C., Hughes, P., Joshi, A., Kelly, L., Khanal, S., Kilic, A., Kinnaird, T., Kunwar, R., Kumar, A., Maskey, P., Lafortune-Bernard, A., Lewer, N., McCaughie, D., Mirnig, N., Roberts, A., …Wilson, A. (2019). Reducing Disaster Risk to Life and Livelihoods by Evaluating the Seismic Safety of Kathmandu’s Historic Urban Infrastructure: enabling an interdisciplinary pilot. Journal of the British Academy, 7(S2), 45-82. https://doi.org/10.5871/jba/007s2.045

Kathmandu’s cities are exceptional architectural and artistic achievements, underpinned by centuries of seismic adaptation. They represent portals where heavens touch the earth and individuals commune with guiding deities; their tangible and intangib... Read More about Reducing Disaster Risk to Life and Livelihoods by Evaluating the Seismic Safety of Kathmandu’s Historic Urban Infrastructure: enabling an interdisciplinary pilot.

On the development of an ultra-high-capacity tensiometer capable of measuring water tensions to 7 MPa (2019)
Journal Article
Mendes, J., Gallipoli, D., Tarantino, A., & Toll, D. (2019). On the development of an ultra-high-capacity tensiometer capable of measuring water tensions to 7 MPa. Géotechnique, 69(6), 560-564. https://doi.org/10.1680/jgeot.18.t.008

Tensiometers are increasingly used in geotechnical engineering to monitor pore-water tension in the field and to study the hydro-mechanical behaviour of unsaturated soils in the laboratory. Early tensiometers exhibited a relatively small measuring ra... Read More about On the development of an ultra-high-capacity tensiometer capable of measuring water tensions to 7 MPa.

Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles (2019)
Journal Article
Liu, G., Toll, D., Kong, L., & Asquith, J. (2020). Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles. Geotechnical Testing Journal, 43(2), 464-479. https://doi.org/10.1520/gtj20170310

The influence of drying and wetting cycles on matric suction and volume characteristics of a compacted low-plasticity clay soil was studied experimentally. An apparatus was developed in which soil specimens were placed in direct contact with a high-s... Read More about Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles.

First Saturation and Resaturation of High Capacity Tensiometers with 1.5 MPa High Air Entry Value (HAEV) Ceramic Filters (2018)
Presentation / Conference Contribution
Mendes, J., Gallipoli, D., Toll, D., & Tarantino, A. (2017, November). First Saturation and Resaturation of High Capacity Tensiometers with 1.5 MPa High Air Entry Value (HAEV) Ceramic Filters. Presented at Second Pan-American Conference on Unsaturated Soils, Dallas, Texas, USA

High capacity tensiometers, or HCTs, are sensors that can measure negative pore water pressures (soil suctions) between −1.5 and −2 MPa. To achieve such measured values, HCTs first need to be fully saturated by water. For the first saturation of an i... Read More about First Saturation and Resaturation of High Capacity Tensiometers with 1.5 MPa High Air Entry Value (HAEV) Ceramic Filters.

Data-Driven Model for Stability Condition Prediction of Soil Embankments Based on Visual Data Features (2018)
Journal Article
Tinoco, J., Gomes Correia, A., Cortez, P., & Toll, D. G. (2018). Data-Driven Model for Stability Condition Prediction of Soil Embankments Based on Visual Data Features. Journal of Computing in Civil Engineering, 32(4), Article 04018027. https://doi.org/10.1061/%28asce%29cp.1943-5487.0000770

Keeping large-scale transportation infrastructure networks, such as railway networks, operational under all conditions is one of the major challenges today. The budgetary constraints for maintenance purposes and the network dimension are two of the m... Read More about Data-Driven Model for Stability Condition Prediction of Soil Embankments Based on Visual Data Features.

Soil–atmosphere interactions for analysing slopes in tropical soils in Singapore (2018)
Journal Article
Toll, D. G., Rahim, M. S. M., Karthikeyan, M., & Tsaparas, I. (2019). Soil–atmosphere interactions for analysing slopes in tropical soils in Singapore. Environmental Geotechnics, 6(6), 361-372. https://doi.org/10.1680/jenge.15.00071

The modelling of soil–atmosphere interactions for slopes requires a proper understanding of the relevant soil parameters (soil water retention curve and the permeability function). This paper reports on numerical investigations of an instrumented res... Read More about Soil–atmosphere interactions for analysing slopes in tropical soils in Singapore.

Atmosphere–vegetation–soil interactions in a climate change context; impact of changing conditions on engineered transport infrastructure slopes in Europe (2018)
Journal Article
Tang, A., Hughes, P., Dijkstra, T., Askarinejad, A., Brenčič, M., Cui, Y., Diez, J., Firgi, T., Gajewska, B., Gentile, F., Grossi, G., Jommi, C., Kehagia, F., Koda, E., ter Maat, H., Lenart, S., Lourenco, S., Oliveira, M., Osinski, P., Springman, S., …Van Beek, V. (2018). Atmosphere–vegetation–soil interactions in a climate change context; impact of changing conditions on engineered transport infrastructure slopes in Europe. Quarterly Journal of Engineering Geology and Hydrogeology, 51(2), 156-168. https://doi.org/10.1144/qjegh2017-103

In assessing the impact of climate change on infrastructure, it is essential to consider the interactions between the atmosphere, vegetation and the near-surface soil. This paper presents an overview of these processes, focusing on recent advances fr... Read More about Atmosphere–vegetation–soil interactions in a climate change context; impact of changing conditions on engineered transport infrastructure slopes in Europe.

Critical state behaviour of weakly bonded soil in drained state (2018)
Journal Article
Ali Rahman, Z., Toll, D., & Gallipoli, D. (2018). Critical state behaviour of weakly bonded soil in drained state. Geomechanics and Geoengineering, 13(4), 233-245. https://doi.org/10.1080/17486025.2018.1454608

Deterioration of geotechnical infrastructure: the influence of asset aging through environmental cycling (2017)
Presentation / Conference Contribution
Stirling, S., Helm, P., Glendinning, S., Asquith, J., Hughes, P., & Toll, D. (2017, September). Deterioration of geotechnical infrastructure: the influence of asset aging through environmental cycling. Presented at 19th Int. Conf. on Soil Mechanics and Geotechnical Engineering, Seoul, Korea

This paper sets out to establish the implication of weather driven deterioration processes on the long-term performance of infrastructure earthworks. With particular reference to UK transport network slopes, the work presented here centres on their s... Read More about Deterioration of geotechnical infrastructure: the influence of asset aging through environmental cycling.

Stability Condition Identification of Rock and Soil Cutting Slopes Based on Soft Computing (2017)
Journal Article
Tinoco, J., Gomes Correia, A., Cortez, P., & Toll, D. G. (2017). Stability Condition Identification of Rock and Soil Cutting Slopes Based on Soft Computing. Journal of Computing in Civil Engineering, 32(2), Article 04017088. https://doi.org/10.1061/%28asce%29cp.1943-5487.0000739

For transportation infrastructure, one of the greatest challenges today is to keep large-scale transportation networks, such as railway networks, operational under all conditions. This task becomes even more difficult to accomplish if one takes into... Read More about Stability Condition Identification of Rock and Soil Cutting Slopes Based on Soft Computing.

Data-driven Classification Approaches for Stability Condition Prediction of Soil Cutting Slopes (2017)
Presentation / Conference Contribution
Tinoco, J., Gomes Correia, A., Cortez, P., & Toll, D. (2017, September). Data-driven Classification Approaches for Stability Condition Prediction of Soil Cutting Slopes. Presented at 19th Int. Conf. on Soil Mechanics and Geotechnical Engineering, Seoul, Korea

For transportation infrastructures, one of the greatest challenges today is to keep large-scale transportation networks, such as railway networks, operational under all conditions. In this paper we present a tool aimed at helping in management tasks... Read More about Data-driven Classification Approaches for Stability Condition Prediction of Soil Cutting Slopes.

Critical state shear strength of an unsaturated artificially cemented sand (2017)
Journal Article
Toll, D., & Ali Rahman, Z. (2017). Critical state shear strength of an unsaturated artificially cemented sand. Géotechnique, 67(3), 208-215. https://doi.org/10.1680/jgeot.15.p.042

This paper presents the results of a set of 22 triaxial tests on an unsaturated artificially cemented sand. The results are used to explore the applicability of a number of unsaturated soil frameworks for interpreting the shear strength. Constant wat... Read More about Critical state shear strength of an unsaturated artificially cemented sand.

Soil water retention behaviour for an instrumented embankment (2016)
Presentation / Conference Contribution
Toll, D., Hughes, P., & Asquith, J. (2016, September). Soil water retention behaviour for an instrumented embankment. Presented at 3rd European Conference on Unsaturated Soils, Paris, France

Measurement of soil suction is important as soil suction is one of the two stress-state variables that control both the hydro and mechanical behaviour of unsaturated soils. One of the soil suction measurement techniques is the filter paper method. Ev... Read More about Soil water retention behaviour for an instrumented embankment.

Water repellent soils: the case for unsaturated soil mechanics (2016)
Presentation / Conference Contribution
Beckett, C., Fourie, A., & Toll, D. (2016, September). Water repellent soils: the case for unsaturated soil mechanics. Presented at 3rd European Conference on Unsaturated Soils, Paris, France

Water repellent (or “hydrophobic” or “non-wetting”) soils have been studied by soil scientists for well over a century. These soils are typified by poor water infiltration, which leads to increased soil erosion and poor crop growth. However, the impo... Read More about Water repellent soils: the case for unsaturated soil mechanics.

Modelling of the water retention characteristic of deformable soils (2016)
Presentation / Conference Contribution
Wang, Y., Sheng, D., Ross, K., & Toll, D. G. (2016, September). Modelling of the water retention characteristic of deformable soils. Presented at 3rd European Conference on Unsaturated Soils, Paris

A recently proposed water retention model has been further developed for the application on unsaturated deformable soils. The physical mechanisms underpinning the water retention characteristic of soils was at first described in terms of traditional... Read More about Modelling of the water retention characteristic of deformable soils.