Brief communication: Post-seismic landslides, the tough lesson of a catastrophe

Fan, Xuanmei; Xu, Qiang; Scaringi, Gianvito

doi:10.5194/nhess-18-397-2018

Cited by 34 publications

(18 citation statements)

References 31 publications

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“…The rock strength, defined as the resistance to permanent deformation by flow or fracture, is often estimated by the Schmidt (rebound) hammer test [8][9][10][11][12][13][14]. Direct surveying and groundbased monitoring, however, can be unfeasible if the rock outcrops are located in inaccessible areas, such as steep mountain ridges or coastal cliffs [15][16][17][18]. Efforts are therefore being made on formulating alternative methods relying on remote sensing techniques for the definition of input data for empirical and physically-based models [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff

et al. 2021

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The mechanical strength is a fundamental characteristic of rock masses that can be empirically related to a number of properties and to the likelihood of instability phenomena. Direct field acquisition of mechanical information on tall cliffs, however, is challenging, particularly in coastal and alpine environments. Here, we propose a method to evaluate the compressive strength of rock blocks by monitoring their thermal behaviour over a 24‐h period by infrared thermography. Using a drone‐mounted thermal camera and a Schmidt (rebound) hammer, we surveyed granitoid and aphanitic blocks in a coastal cliff in south‐east Sardinia, Italy. We observed a strong correlation between a simple cooling index, evaluated in the hours succeeding the temperature peak, and strength values estimated from rebound hammer test results. We also noticed different heatingcooling patterns in relation to the nature and structure of the rock blocks and to the size of thefractures. Although further validation is warranted in different morpho‐lithological settings, we believe the proposed method may prove a valid tool for the characterisation of non‐directly accessible rock faces, and may serve as a basis for the formulation, calibration, and validation of thermo‐hydro‐mechanical constitutive models.

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Section: Introductionmentioning

confidence: 99%

An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff

et al. 2021

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“…These earthquakes may reduce the strength of the soil-rocks at the site [27] so that even the latest earthquake (on 29 July 2019) recorded near the site was only 3.3 magnitude in July to August in 2019 and which was 200 km away from the site. The earthquake was also a significant cause of the slide [29][30][31][32].…”

Section: Seismic Fracture Zonementioning

confidence: 99%

Investigation of Landslides that Occurred in August on the Chengdu–Kunming Railway, Sichuan, China

et al. 2019

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This paper reports on a large-scale landslide with a movement of 48 thousand m3 of soil and rock that occurred in Sichuan, China. This catastrophic landslide occurred in Aidai village, Ganluo County, at 12:44 on 14 August 2019, blocking a section of the railway between Lianghong station and Aidai station. This landslide resulted in 12 deaths and five people missing. This report describes the preliminary investigation, the rescue activity, topographic survey and analysis as well as the main predisposing and triggering factors. The combined effects of steep topography, continuous rainstorms, floods eroding the foothills of the mountain and human activity were the main influencing factors that triggered this landslide. To reduce the possibility of casualties resulting from large geological disasters, such as landslides and mudslides, in this region in the future, some recommendations are proposed to systematically reduce potential human casualties and economic losses.

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“…The strong Wenchuan earthquake triggered about 15000 landslides, which caused great damage and brought many new related researches (Wasowski et al 2011;Chen et al 2014;Li et al 2014;Zhang et al 2014;Kritikos et al 2015;He et al 2017;Marc et al 2017;Tanyas et al 2017Tanyas et al , 2018Tanyas et al , 2019Del Gaudio et al 2011;Fan et al 2018;Li et al 2018;Yang et al 2018;Domenech et al 2019;Fan et al 2019;He and Singh 2019;Zhang et al 2011). The contents focused mainly on the temporal-spatial distribution, progressive damage and long-runout sliding, controlling factors and formation mechanisms of the coseismic landslides (Sato and Harp 2009;Yin et al 2009;Chigira et al 2010;Michele et al 2010;Gorum et al 2011;Qi et al 2011;Xu et al 2011;Yin et al 2011;Luo et al 2012;Sun et al 2012;Huang and Fan 2013;Xu et al 2013;Wang et al 2014Wang et al , 2015).…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of the Daguangbao landslide triggered by the Wenchuan earthquake with a composite hypocenter

Cui

Xiong

et al. 2021

Geomatics, Natural Hazards and Risk

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To identify the correspondence between the different dynamic responses of the Daguangbao landslide and the different faulting mechanisms of the composite-hypocenter, the whole hypocenter of the Wenchuan earthquake was divided into four sub-hypocenters. On another hand, based on the location of the Dauangbao landslide, the composite-hypocenter was divided into the Initial Sub-hypocenter, the Approaching Sub-hypocenter, the Local Sub-hypocenter, the Receding sub-hypocenter and the Terminal sub-hypocenter. Subsequently, dynamic response of the landslide was modeled by using UDEC software. The results show that progressive damage and critical failure of the mega landslide are triggered by the second subhypocenter. Simutaneously, with respect to the second classification basis, its progressive damage is induced by the Approaching Hypocenter and the Local Hypocenter in time sequence. The Local Hypocenter triggers its critical failure. During the long-runout stage, besides the local topography, its self-gravity poses a dominant contribution to the dynamic responses of the landslide. Especially, the inertial seismic force is another key factor that triggers the ejection stage of the landslide. The following seismic forces triggered by the corresponding sub-hypocenter influence the long-runout stage slightly. The horizontal seismic force poses a dominant contribution to the progressive damage and critical failure of the mega landslide.

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Brief communication: Post-seismic landslides, the tough lesson of a catastrophe

Cited by 34 publications

References 31 publications

An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff

An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff

Investigation of Landslides that Occurred in August on the Chengdu–Kunming Railway, Sichuan, China

Dynamic response of the Daguangbao landslide triggered by the Wenchuan earthquake with a composite hypocenter

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