Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis
This paper seeks to investigate the effect of rainfall intensity on the occurrence of shallow landslides by means of a series of flume tests. Coarse-grained material was used to build a slope, and several rainfall events with an intensity of either 40 mm/h, 70 mm/h, or 100 mm/h were simulated to ini...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Geotechnics |
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| Online Access: | https://www.mdpi.com/2673-7094/3/1/7 |
| _version_ | 1797611513389776896 |
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| author | Qianhao Tang Ivan Gratchev Sinnappoo Ravindran |
| author_facet | Qianhao Tang Ivan Gratchev Sinnappoo Ravindran |
| author_sort | Qianhao Tang |
| collection | DOAJ |
| description | This paper seeks to investigate the effect of rainfall intensity on the occurrence of shallow landslides by means of a series of flume tests. Coarse-grained material was used to build a slope, and several rainfall events with an intensity of either 40 mm/h, 70 mm/h, or 100 mm/h were simulated to initiate slope failure. A set of pore water pressure and moisture content sensors was installed in the slope to monitor changes in the water conditions during each test. Different initial moisture contents of 5% and 10% of the soil mass were used to better understand the effect of moisture on slope stability during rainfall. It was found that the slope failed when intensities of 70 mm/h and 100 mm/h were used; however, no failure was observed with a rainfall intensity of 40 mm/h. The failure patterns were found to be similar, with progressive slides occurring as more water infiltrated the slope. A numerical procedure to estimate the factor of safety over the period of the rainfall event was proposed and validated against the laboratory data. The results of the numerical analysis yielded the failure time, which was close to the time observed in the flume tests. |
| first_indexed | 2024-03-11T06:28:46Z |
| format | Article |
| id | doaj.art-1d53e094bac3447bb5c0f91148480b8e |
| institution | Directory Open Access Journal |
| issn | 2673-7094 |
| language | English |
| last_indexed | 2024-03-11T06:28:46Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geotechnics |
| spelling | doaj.art-1d53e094bac3447bb5c0f91148480b8e2023-11-17T11:20:12ZengMDPI AGGeotechnics2673-70942023-03-013110411510.3390/geotechnics3010007Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical AnalysisQianhao Tang0Ivan Gratchev1Sinnappoo Ravindran2School of Engineering and Built Environment, Griffith University, Southport, QLD 4222, AustraliaSchool of Engineering and Built Environment, Griffith University, Southport, QLD 4222, AustraliaSchool of Engineering and Built Environment, Griffith University, Southport, QLD 4222, AustraliaThis paper seeks to investigate the effect of rainfall intensity on the occurrence of shallow landslides by means of a series of flume tests. Coarse-grained material was used to build a slope, and several rainfall events with an intensity of either 40 mm/h, 70 mm/h, or 100 mm/h were simulated to initiate slope failure. A set of pore water pressure and moisture content sensors was installed in the slope to monitor changes in the water conditions during each test. Different initial moisture contents of 5% and 10% of the soil mass were used to better understand the effect of moisture on slope stability during rainfall. It was found that the slope failed when intensities of 70 mm/h and 100 mm/h were used; however, no failure was observed with a rainfall intensity of 40 mm/h. The failure patterns were found to be similar, with progressive slides occurring as more water infiltrated the slope. A numerical procedure to estimate the factor of safety over the period of the rainfall event was proposed and validated against the laboratory data. The results of the numerical analysis yielded the failure time, which was close to the time observed in the flume tests.https://www.mdpi.com/2673-7094/3/1/7landsliderainfallflume testnumerical analysis |
| spellingShingle | Qianhao Tang Ivan Gratchev Sinnappoo Ravindran Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis Geotechnics landslide rainfall flume test numerical analysis |
| title | Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis |
| title_full | Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis |
| title_fullStr | Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis |
| title_full_unstemmed | Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis |
| title_short | Effect of Rainfall Intensity on Landslide Initiation: Flume Tests and Numerical Analysis |
| title_sort | effect of rainfall intensity on landslide initiation flume tests and numerical analysis |
| topic | landslide rainfall flume test numerical analysis |
| url | https://www.mdpi.com/2673-7094/3/1/7 |
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