Back to Search Start Over

Comprehensive Analysis of the Failure Potential of a Motorway Landslide in Dabu County, China

Authors :
Sheng Chen
Yang Hao
Wencai Zhang
Ying Sun
Xue Liu
Source :
Water, Vol 15, Iss 14, p 2675 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

Because the failure potential of a landslide is difficult to assess, a motorway landslide that has obviously deformed was used as a case study in this research. Several multi-integrated geotechniques, including field investigation, drilling, electrical resistivity tomography (ERT), stability analysis, and numerical simulations, were used to achieve this goal. Field investigation with drilling was used to roughly determine the failure potential mass boundary and the material composition ERT technique was further used to distinguish the structure and composition of underground materials; the results agreed well with the field investigation, as well as the drilling data in the lithology judgement. The above investigations also showed the failure potential mass is in a slow sliding state and the slip surface roughly follows the contact zone between the upper soil and bedrock. Next, stability analysis based on the limit equilibrium method (LEM) was used to judge the current stability status of the slope, and its factor of safety (FOS) was 1.2 under the natural condition, 1.05 under the earthquake condition, and 1.15 under the rainfall condition. Based on the assessed potential slip surface and digital elevation data, a three-dimensional smoothed particle hydrodynamics (SPH) model was used to simulate the failure potential process. The dynamic information of the run-out behavior, including velocity, movement distance, and frictional energy, can be obtained, which is useful for hazard prediction.

Details

Language :
English
ISSN :
20734441
Volume :
15
Issue :
14
Database :
Directory of Open Access Journals
Journal :
Water
Publication Type :
Academic Journal
Accession number :
edsdoj.6e409f2b78f24d4e8b25577457381680
Document Type :
article
Full Text :
https://doi.org/10.3390/w15142675