Seepage-stress coupled modeling for rainfall induced loess landslide

Danyang Zhou; Zhen Zhang; Jiachun Li; Xiaoliang Wang

doi:10.1016/j.taml.2019.02.006

Seepage-stress coupled modeling for rainfall induced loess landslide

Danyang Zhou, Zhen Zhang^*, Jiachun Li, Xiaoliang Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Although rainfall is rare on the Loess Plateau of western China, landslides occur frequently there in rainy season. Surveys report that landslide hazards always follow heavy rains. In this study, a seepage-stress coupling model for rainfall induced landslide is used to examine an actual disastrous event in Yulin by the end of July, 2017. The effects of rainfall duration, rainfall intensity and soil weakening on slope stability are studied in detail. The results illustrate that the safety factor drops sharply at first and then is gradually declining to below 1.05 during additional two days of heavy rain. With soil strength softening considered, the slope would be more unstable, in which the weakening in soil cohesion is found to be a more sensitive factor.

Original language	English
Pages (from-to)	7-13
Number of pages	7
Journal	Theoretical and Applied Mechanics Letters
Volume	9
Issue number	1
DOIs	https://doi.org/10.1016/j.taml.2019.02.006
Publication status	Published - Jan 2019
Externally published	Yes

Keywords

Landslide
Loess
Rain infiltration
Seepage-stress coupling
Strength weakening

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10.1016/j.taml.2019.02.006

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title = "Seepage-stress coupled modeling for rainfall induced loess landslide",

abstract = "Although rainfall is rare on the Loess Plateau of western China, landslides occur frequently there in rainy season. Surveys report that landslide hazards always follow heavy rains. In this study, a seepage-stress coupling model for rainfall induced landslide is used to examine an actual disastrous event in Yulin by the end of July, 2017. The effects of rainfall duration, rainfall intensity and soil weakening on slope stability are studied in detail. The results illustrate that the safety factor drops sharply at first and then is gradually declining to below 1.05 during additional two days of heavy rain. With soil strength softening considered, the slope would be more unstable, in which the weakening in soil cohesion is found to be a more sensitive factor.",

keywords = "Landslide, Loess, Rain infiltration, Seepage-stress coupling, Strength weakening",

author = "Danyang Zhou and Zhen Zhang and Jiachun Li and Xiaoliang Wang",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors. Published by Elsevier Ltd on behalf of The Chinese Society of Theoretical and Applied Mechanics",

year = "2019",

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doi = "10.1016/j.taml.2019.02.006",

language = "English",

volume = "9",

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TY - JOUR

T1 - Seepage-stress coupled modeling for rainfall induced loess landslide

AU - Zhou, Danyang

AU - Zhang, Zhen

AU - Li, Jiachun

AU - Wang, Xiaoliang

PY - 2019/1

Y1 - 2019/1

N2 - Although rainfall is rare on the Loess Plateau of western China, landslides occur frequently there in rainy season. Surveys report that landslide hazards always follow heavy rains. In this study, a seepage-stress coupling model for rainfall induced landslide is used to examine an actual disastrous event in Yulin by the end of July, 2017. The effects of rainfall duration, rainfall intensity and soil weakening on slope stability are studied in detail. The results illustrate that the safety factor drops sharply at first and then is gradually declining to below 1.05 during additional two days of heavy rain. With soil strength softening considered, the slope would be more unstable, in which the weakening in soil cohesion is found to be a more sensitive factor.

AB - Although rainfall is rare on the Loess Plateau of western China, landslides occur frequently there in rainy season. Surveys report that landslide hazards always follow heavy rains. In this study, a seepage-stress coupling model for rainfall induced landslide is used to examine an actual disastrous event in Yulin by the end of July, 2017. The effects of rainfall duration, rainfall intensity and soil weakening on slope stability are studied in detail. The results illustrate that the safety factor drops sharply at first and then is gradually declining to below 1.05 during additional two days of heavy rain. With soil strength softening considered, the slope would be more unstable, in which the weakening in soil cohesion is found to be a more sensitive factor.

KW - Landslide

KW - Loess

KW - Rain infiltration

KW - Seepage-stress coupling

KW - Strength weakening

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DO - 10.1016/j.taml.2019.02.006

M3 - Article

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SN - 2095-0349

VL - 9

SP - 7

EP - 13

JO - Theoretical and Applied Mechanics Letters

JF - Theoretical and Applied Mechanics Letters

IS - 1

ER -

Seepage-stress coupled modeling for rainfall induced loess landslide

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Keywords

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