Tunnelling in landslide areas connected to deep seated gravitational deformations: An example in Central Alps (northern Italy)

Gattinoni, Paola; Consonni, M.; Francani, Vincenzo; Leonelli, Giovanni; Lorenzo, C.

doi:10.1016/j.tust.2019.103100

Cited by 31 publications

(9 citation statements)

References 33 publications

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“…Through numerical simulation and model experiment, Zhang et al [35] found that the influence range of the slope deformation caused by tunnel excavation is 1.5 times that of the tunnel span. Gattinoni et al [36] reconstructed the conceptual model of both the slope dynamics and the tunnel construction at first. Then, based on numerical simulation, it is concluded that long and heavy rainfall can contribute to slope instability much more than tunnel excavation itself.…”

Section: Introductionmentioning

confidence: 99%

The Progressive Failure Mechanism of the Tunnel-Slope System under Rainfall: An Experimental Investigation

2022

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Tunnel excavation has always been an important reason for the stability failure of the tunnel-slope system at the portal section. In case of rainfall, it is likely to cause serious disasters such as tunnel vault collapse, water inrush from the tunnel face, and slope slip. In this study, the Sunjiaya tunnel of the Daping slope group was taken as the engineering background, and the tunnel model experiment system under the condition of rainfall and groundwater seepage was designed independently to explore the failure laws of slope instability induced by tunnel excavation under the condition of rainfall. Meanwhile, a fiber grating monitoring system was also used to measure the displacement, water content, earth pressure, and seepage pressure at different positions of the tunnel-slope system in the process of tunnel excavation under the condition of rainfall. The results show that the slope instability caused by rainfall infiltration is gradual. At the beginning of rainfall, the rainfall infiltration has little effect on the stability of the tunnel-slope system and then gradually increases with the continuous rainfall. Finally, the slope surface is uneven, and the phenomenon of gully and surface flow is serious. The foot of slope moves back continuously, resulting in overall collapse. Moreover, during the process of tunnel excavation, the cracks on the tunnel vault of the unburied tunnel lining develop in quadratic along the tunnel excavation direction, and the closer to the excavation section, the larger the collapse range. Finally, there is an integral collapse of the vault of tunnel excavation section. In addition, variation laws of parameters in the tunnel-slope system also provide an important explanation for the hysteresis of the stability failure of the tunnel-slope system. The results have important guiding significance for the stability of the tunnel-slope system during construction.

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Section: Introductionmentioning

confidence: 99%

The Progressive Failure Mechanism of the Tunnel-Slope System under Rainfall: An Experimental Investigation

2022

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“…Tunnel deformation and fracturing are generally complex engineering geology/geomorphology problems. Fault zone weakening, intersecting joint sets, seismic activity, landslides, and groundwater convergence are common causes of tunnel deformation and failure (Hoek and Marinos 2000;Konagai et al 2005;Gattinoni et al 2019). Considering that tunnel deformation and failure often have unpredictable consequences, research on the causes and prevention of tunnel deformation and failure has attracted much attention.…”

Section: Analysis Of the Cause Of Tunnel Deformationmentioning

confidence: 99%

“…Zhang et al (2017) developed a 'slip line' theory which included obtaining the range of disturbance caused by tunnel excavation and determining the minimum safe distance between the tunnel vault and slip zone. Gattinoni (2019) studied the influence of deep-seated gravitational slope deformation on tunnels, and Zhang et al (2015) studied the mechanical conditions of landslides induced by tunnel excavation. Various research methods are being used to analyse the relationship between landslides and tunnels, including detailed geological and geomorphic investigation, three-dimensional numerical simulation, surface deformation monitoring based on InSAR technology, and GPS/GNSS monitoring (Tang et al 2013;Singh et al 2014;Troncone et al 2014; Barla et al 2015;Nikadat et al 2015;Zhang et al 2015;Komu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Deformation of the Zhangjiazhuang high-speed railway tunnel: an analysis of causal mechanisms using geomorphological surveys and D-InSAR monitoring

Meng

Zhao

et al. 2021

J. Mt. Sci.

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On 18 January 2016, the Zhangjiazhuang high-speed railway tunnel in Ledu, Qinghai Province, China, underwent serious deformation and structural damage. A crack formed at the top of the tunnel and the concrete on the crown peeled off. As a result, the tunnel could not be operated for three months. In order to determine the types and spatial distribution of the landslides in the region and the surface deformation characteristics associated with the tunnel deformation, we used field geological and geomorphological surveys, unmanned aerial vehicle image interpretation and differential interferometric synthetic aperture radar (D-InSAR) surface deformation monitoring. Nine ancient and old landslides were identified and analysed in the study area. Surface deformation monitoring and investigation of buildings in several villages on the slope front showed that the tunnel deformation was not related to deep-seated gravitational slope deformation. However, surface deformation monitoring revealed an active NEE-SWW fault in the area intersecting the tunnel at the location of the tunnel rupture. This constitutes a plausible mechanism for the deformation of the tunnel. Our study highlights the need for detailed engineering geomorphological investigations to better predict the occurrence of tunnel deformation events in the future.

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“…However, in some cases, slow-moving phenomena become apparent only after construction is complete, manifesting as cracks and damage on rigid structures, such as road tunnels and related infrastructures. The occurrence of this type of situation is evidenced by numerous cases that have been thoroughly investigated around the world [5][6][7][8]. The San Lorenzo road tunnel, constructed to bypass an open-air tortuous tract of N.R.…”

Section: Introductionmentioning

confidence: 99%

Investigation and Monitoring for Ever-Updating Engineering Geological Models: The Example of the Passo della Morte Landslide System

Ballaera,

Festi,

Borgatti

et al. 2024

Geosciences

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In mountainous regions, where large valleys are essential corridors for settlements and infrastructures, landslide hazard management is a pressing challenge. Large, slow-moving landslides are sometimes difficult to detect. On the one hand, the identification of geomorphological evidence supported by a detailed analysis of possible geological predisposing factor is crucial. On the other hand, to confirm the state of activity of the landslide, displacements should also be detected through monitoring. However, monitoring is challenging when large areas and volumes are involved and when cost effectiveness is an issue. This study presents a comprehensive analysis of the Passo della Morte landslide system, located in the Carnian Alps, which has historically posed a significant threat to critical road infrastructures, including a 2200 m long tunnel. The area is exploited as an example of how an iterative 3M approach (Monitoring, Modeling, and Mitigation), can inform and update engineering geological models of unstable slopes by enabling a detailed comprehension of landslide dynamics, facilitating in turn the development of more effective strategies for risk management and mitigation. Through detailed investigation and continuous monitoring over nearly two decades, the engineering geological model has been refined, integrated with new field data, and has progressively improved understanding of slope instability processes. This work underscores the importance of a dynamic and adaptive approach to geological hazard management, providing a valuable framework for similar challenges in other regions.

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Tunnelling in landslide areas connected to deep seated gravitational deformations: An example in Central Alps (northern Italy)

Cited by 31 publications

References 33 publications

The Progressive Failure Mechanism of the Tunnel-Slope System under Rainfall: An Experimental Investigation

The Progressive Failure Mechanism of the Tunnel-Slope System under Rainfall: An Experimental Investigation

Deformation of the Zhangjiazhuang high-speed railway tunnel: an analysis of causal mechanisms using geomorphological surveys and D-InSAR monitoring

Investigation and Monitoring for Ever-Updating Engineering Geological Models: The Example of the Passo della Morte Landslide System

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