Numerical analysis on the reach and velocity of landslide movement
Debris slides cannot be prevented because of their destructive forces, but certain measures may possibly be taken to avert extensive economic damage or loss of life. A prediction of the reach and velocity of a slide, as well as that of the dangerous slope, is one of the most important measures. The...
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| Format: | Article NonPeerReviewed |
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[Yogyakarta] : Universitas Gadjah Mada
2001
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| Online Access: | https://repository.ugm.ac.id/18574/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=1366 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Debris slides cannot be prevented because of their destructive forces, but certain measures may possibly be taken to avert extensive economic damage or loss of life. A prediction of the reach and velocity of a slide, as well as that of the dangerous slope, is one of the most important measures. The urgent zoning of debris-covered area beforehand is useful when conducting evacuation activities from dangerous areas during times of impending landslides.
This research develops the numerical analysis of the simulation for landslide movements by analyzing quantitatively a series of processes from the start of movement to the deposition. This simulation assumes that the sliding mass is an incompressible Newtonian fluid and used the NavierStokes equation as the governing equation of motion. The calculation was handled quasi-three-dimensionally for the problem of plane flow considering the distribution and thickness of landslide debris.
The results show that the reach and velocity of landslide movements can be obtained from the numerical analysis. Friction angle of sliding mass and sliding surface are much smaller than those obtained from static soil tests and thus is probably expressing "apparent angle of internal friction" including the influence of dynamic conditions and pore water pressure.
Keywords: numerical analysis, the reach of sliding mass, the velocity of landslide movement |
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