Predicting periodic rainfall-induced slope displacements using force-equilibrium-based finite displacement method

Ching-Chuan Huang, Shan Wun Yeh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A cost-and time-effective derivation of the strength parameters for deep-seated sliding surfaces in natural slopes consisting of highly weathered or fractured rocks is of high practical importance. A force-equilibrium-based finite displacement method (FFDM) is used to back-calculate material property to alleviate possible difficulties in evaluating strength and deformation properties of highly weathered rocks using undisturbed soil sampling for a deep-seated sliding surface. The FFDM incorporates Bishop's slice method and nonlinear shear stress-displacement relationships. As a result, shear displacements along a circular potential failure surface can be computed. The displacement-related parameters obtained from a back-analysis using FFDM are then used to predict long-term cumulative slope displacements induced by periodic ground water table fluctuations. Results of the analytical study show that the long-term cumulative slope displacement of the slope can be well-predicted using the displacement-related parameters back-calculated from the first event of slope displacement induced by a groundwater table rise.

Original languageEnglish
Pages (from-to)83-89
Number of pages7
JournalJournal of GeoEngineering
Volume10
Issue number3
DOIs
Publication statusPublished - 2015

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Rain
rainfall
Groundwater
Rocks
Shear stress
Materials properties
Sampling
Soils
sliding
method
Costs
groundwater
back analysis
rock
shear stress
water table
sampling
cost

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

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abstract = "A cost-and time-effective derivation of the strength parameters for deep-seated sliding surfaces in natural slopes consisting of highly weathered or fractured rocks is of high practical importance. A force-equilibrium-based finite displacement method (FFDM) is used to back-calculate material property to alleviate possible difficulties in evaluating strength and deformation properties of highly weathered rocks using undisturbed soil sampling for a deep-seated sliding surface. The FFDM incorporates Bishop's slice method and nonlinear shear stress-displacement relationships. As a result, shear displacements along a circular potential failure surface can be computed. The displacement-related parameters obtained from a back-analysis using FFDM are then used to predict long-term cumulative slope displacements induced by periodic ground water table fluctuations. Results of the analytical study show that the long-term cumulative slope displacement of the slope can be well-predicted using the displacement-related parameters back-calculated from the first event of slope displacement induced by a groundwater table rise.",
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Predicting periodic rainfall-induced slope displacements using force-equilibrium-based finite displacement method. / Huang, Ching-Chuan; Yeh, Shan Wun.

In: Journal of GeoEngineering, Vol. 10, No. 3, 2015, p. 83-89.

Research output: Contribution to journalArticle

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