Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan
A new consolidated undrained ring shear test capable of measuring the pore pressures is presented to investigate the initiation mechanism of the Hsien-du-shan rock avalanche, triggered by Typhoon Morakot, in southern Taiwan. The postpeak state of the landslide surface between the Tangenshan sandston...
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| Language: | English |
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Wiley
2018-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2018/9410890 |
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| author | Hung-Ming Lin Jian-Hong Wu Erik Sunarya |
| author_facet | Hung-Ming Lin Jian-Hong Wu Erik Sunarya |
| author_sort | Hung-Ming Lin |
| collection | DOAJ |
| description | A new consolidated undrained ring shear test capable of measuring the pore pressures is presented to investigate the initiation mechanism of the Hsien-du-shan rock avalanche, triggered by Typhoon Morakot, in southern Taiwan. The postpeak state of the landslide surface between the Tangenshan sandstone and the remolded landslide gouge is discussed to address the unstable geomorphological precursors observed before the landslide occurred. Experimental results show that the internal friction angle of the high water content sliding surface in the total stress state, between 25.3 and 26.1°, clarifies the reason of the stable slope prior to Typhoon Morakot. In addition, during the ring shear tests, it is observed that the excess pore pressure is generated by the shear contractions of the sliding surface. The remolded landslide gouge, sheared under the high normal stress, rendered results associated with high shear strength, small shear contraction, low hydraulic conductivity, and continuous excess pore pressure. The excess pore pressure feedback at the sliding surface may have accelerated the landslide. |
| format | Article |
| id | doaj-art-bfa4c8e13bb44ac78e6af51d73bf89c6 |
| institution | OA Journals |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-bfa4c8e13bb44ac78e6af51d73bf89c62025-08-20T02:19:27ZengWileyGeofluids1468-81151468-81232018-01-01201810.1155/2018/94108909410890Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in TaiwanHung-Ming Lin0Jian-Hong Wu1Erik Sunarya2Sustainable Environment Research Laboratories, National Cheng Kung University, Tainan, TaiwanDepartment of Civil Engineering, National Cheng Kung University, Tainan 701, TaiwanDepartment of Civil Engineering, National Cheng Kung University, Tainan 701, TaiwanA new consolidated undrained ring shear test capable of measuring the pore pressures is presented to investigate the initiation mechanism of the Hsien-du-shan rock avalanche, triggered by Typhoon Morakot, in southern Taiwan. The postpeak state of the landslide surface between the Tangenshan sandstone and the remolded landslide gouge is discussed to address the unstable geomorphological precursors observed before the landslide occurred. Experimental results show that the internal friction angle of the high water content sliding surface in the total stress state, between 25.3 and 26.1°, clarifies the reason of the stable slope prior to Typhoon Morakot. In addition, during the ring shear tests, it is observed that the excess pore pressure is generated by the shear contractions of the sliding surface. The remolded landslide gouge, sheared under the high normal stress, rendered results associated with high shear strength, small shear contraction, low hydraulic conductivity, and continuous excess pore pressure. The excess pore pressure feedback at the sliding surface may have accelerated the landslide.http://dx.doi.org/10.1155/2018/9410890 |
| spellingShingle | Hung-Ming Lin Jian-Hong Wu Erik Sunarya Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan Geofluids |
| title | Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan |
| title_full | Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan |
| title_fullStr | Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan |
| title_full_unstemmed | Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan |
| title_short | Consolidated and Undrained Ring Shear Tests on the Sliding Surface of the Hsien-du-shan Landslide in Taiwan |
| title_sort | consolidated and undrained ring shear tests on the sliding surface of the hsien du shan landslide in taiwan |
| url | http://dx.doi.org/10.1155/2018/9410890 |
| work_keys_str_mv | AT hungminglin consolidatedandundrainedringsheartestsontheslidingsurfaceofthehsiendushanlandslideintaiwan AT jianhongwu consolidatedandundrainedringsheartestsontheslidingsurfaceofthehsiendushanlandslideintaiwan AT eriksunarya consolidatedandundrainedringsheartestsontheslidingsurfaceofthehsiendushanlandslideintaiwan |