Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

WANG Huiqing; FENG Chengjun; QI Bangshen; WANG Jiming; SUN Mingqian; YANG Xiaoxiao; WAN Jiawei; FAN Yulu; ZHANG Peng; MENG Jing; TAN Chengxuan

doi:10.12090/j.issn.1006-6616.2020.26.04.052

Volume 26 Issue 4

Aug. 2020

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Article Navigation > Journal of Geomechanics > 2020 > 26(4): 595-603

WANG Huiqing, FENG Chengjun, QI Bangshen, et al., 2020. Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province. Journal of Geomechanics, 26 (4): 595-603. DOI: 10.12090/j.issn.1006-6616.2020.26.04.052

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Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

doi: 10.12090/j.issn.1006-6616.2020.26.04.052

WANG Huiqing^{1, 2
,},
FENG Chengjun^{1, 2
,
,},
QI Bangshen³,
WANG Jiming⁴,
SUN Mingqian^{1, 2},
YANG Xiaoxiao^{1, 2},
WAN Jiawei^{1, 2, 5},
FAN Yulu^{1, 2},
ZHANG Peng^{1, 2},
MENG Jing^{1, 2},
TAN Chengxuan^{1, 2}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory Neotectonic Movement & Geohazard, Ministry of Natural Resources, Beijing 100081, China
3.
Beijing Institute of Geo-exploration Technology, Beijing 100120, China
4.
China United Engineering Corporation Limited, Hangzhou 310051, Zhejiang, China
5.
China University of Geosciences(Beijing), Beijing 100083, China

More Information

Received: 2020-06-15
Revised: 2020-07-05
Published: 2020-08-01

Abstract

Abstract

The Lisizhuang landslide is the most potentially dangerous accumulation landslide in a residual slope accumulation layer. The toe of the landslide slope was cut to meet the need of construction land, reducing the stability of the landslide. Under the extreme rainfall conditions, the landslide may revive. Based on the field survey, the structural characteristics and main factors affecting the stability of the Lisizhuang landslide are determined. An improved Mein-Larson rainfall infiltration model was utilized to analyze the influence of different rainfall intensities and durations on the safety factor of the landslide. And the finite difference software FLAC^3D was used to simulate the stability of the landslide under natural conditions and extreme rainfall conditions. The results show that:In the natural state, the potential slip surface of the slope is the interface between the bedrock and the residual slope, and the safety factor is 1.18. The landslide stays stable. With the increase of the rainfall duration, the potential slip surface is transferred from the interface between the bedrock and the residual slope to the wetting front. When the wetting front reaches the boundary between the bedrock and the residual slope, the numerical simulation shows that the safety factor of the landslide is 0.83, and the landslide is unstable. Retaining wall and drainage ditch for slope treatments of the Lisizhuang landslide are put forward in this paper.
- accumulation landslide,
- stability,
- Mein-Larsonrn rainfall infiltration model,
- FLAC^3D

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Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

doi: 10.12090/j.issn.1006-6616.2020.26.04.052

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Analysis of the stability of the Lisizhuang landslide in Shunping County, Hebei Province

doi: 10.12090/j.issn.1006-6616.2020.26.04.052

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