An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits
In this study, a series of experiments of the full-scale physical model was employed to investigate the hydromechanical behaviours of the postearthquake landslide evolution, in forms of rill erosion and shallow headward failure on the rill bank slopes under unsaturated conditions. Soil-water charact...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2019/3032494 |
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| author | Huan Cai Zong-Ji Yang Li-Yong Wang Xiao-Qin Lei Xiao-Long Fu Shi-Hao Liu Jian-Ping Qiao |
| author_facet | Huan Cai Zong-Ji Yang Li-Yong Wang Xiao-Qin Lei Xiao-Long Fu Shi-Hao Liu Jian-Ping Qiao |
| author_sort | Huan Cai |
| collection | DOAJ |
| description | In this study, a series of experiments of the full-scale physical model was employed to investigate the hydromechanical behaviours of the postearthquake landslide evolution, in forms of rill erosion and shallow headward failure on the rill bank slopes under unsaturated conditions. Soil-water characteristic curves (SWCC) were established using the Brooks-Corey (BC) and van Genuchten (VG) models. The stability of the shallow failure was then analyzed via a one-dimensional and unsaturated stability analysis model of the infinite slope. This measurement revealed that the preferential flow and the matrix flow coexisted when infiltration occurred and the VG model performs better in fitting the SWCC than the BC model. Consistent feedback between stability calculations and experimental observations enables the analysis of mechanisms of rill erosion and slope failure of postseismic landslide under the impact of preferential flow. Furthermore, the seepage-induced internal erosion phenomenon was observed in the experiment. This work thus provides a new perspective on the triggering mechanisms of debris flow during the postseismic period. |
| format | Article |
| id | doaj-art-41fef682bb624005afe7fba6ce053502 |
| institution | DOAJ |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-41fef682bb624005afe7fba6ce0535022025-08-20T02:39:16ZengWileyGeofluids1468-81151468-81232019-01-01201910.1155/2019/30324943032494An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide DepositsHuan Cai0Zong-Ji Yang1Li-Yong Wang2Xiao-Qin Lei3Xiao-Long Fu4Shi-Hao Liu5Jian-Ping Qiao6Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaInstitute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaInstitute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaInstitute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaInstitute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaInstitute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaInstitute of Mountain Hazards and Environment, CAS, Chengdu 610041, ChinaIn this study, a series of experiments of the full-scale physical model was employed to investigate the hydromechanical behaviours of the postearthquake landslide evolution, in forms of rill erosion and shallow headward failure on the rill bank slopes under unsaturated conditions. Soil-water characteristic curves (SWCC) were established using the Brooks-Corey (BC) and van Genuchten (VG) models. The stability of the shallow failure was then analyzed via a one-dimensional and unsaturated stability analysis model of the infinite slope. This measurement revealed that the preferential flow and the matrix flow coexisted when infiltration occurred and the VG model performs better in fitting the SWCC than the BC model. Consistent feedback between stability calculations and experimental observations enables the analysis of mechanisms of rill erosion and slope failure of postseismic landslide under the impact of preferential flow. Furthermore, the seepage-induced internal erosion phenomenon was observed in the experiment. This work thus provides a new perspective on the triggering mechanisms of debris flow during the postseismic period.http://dx.doi.org/10.1155/2019/3032494 |
| spellingShingle | Huan Cai Zong-Ji Yang Li-Yong Wang Xiao-Qin Lei Xiao-Long Fu Shi-Hao Liu Jian-Ping Qiao An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits Geofluids |
| title | An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits |
| title_full | An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits |
| title_fullStr | An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits |
| title_full_unstemmed | An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits |
| title_short | An Experimental Study on the Hydromechanical Behaviours of the Evolution of Postearthquake Landslide Deposits |
| title_sort | experimental study on the hydromechanical behaviours of the evolution of postearthquake landslide deposits |
| url | http://dx.doi.org/10.1155/2019/3032494 |
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