Modification of the gravity increase method in slope stability analysis

The gravity increase method (GIM) has an inherent defect that may result in an incorrectly calculated safety factor or result in a failure to obtain the expected outcome. In this study, the error source of the GIM was quantitatively analyzed through theoretical derivation to address this problem. He...

Full description

Saved in:
Bibliographic Details
Published in:Bulletin of engineering geology and the environment 2019-09, Vol.78 (6), p.4241-4252
Main Authors: Hu, Chang-ming, Yuan, Yi-li, Mei, Yuan, Wang, Xue-yan, Liu, Zheng
Format: Article
Language:English
Subjects:
CAD
Computer aided design
Computer aided testing
Deformation
Dimensions
Earth and Environmental Science
Earth Sciences
Error analysis
Error correction
Foundations
Geoecology/Natural Processes
Geoengineering
Geological engineering
Geotechnical engineering
Geotechnical Engineering & Applied Earth Sciences
Gravitation
Gravity
Hydraulics
Mathematical models
Methods
Model testing
Nature Conservation
Numerical analysis
Original Paper
Safety factors
Shear strength
Slope
Slope stability
Slopes
Soil
Soil testing
Soils
Stability analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The gravity increase method (GIM) has an inherent defect that may result in an incorrectly calculated safety factor or result in a failure to obtain the expected outcome. In this study, the error source of the GIM was quantitatively analyzed through theoretical derivation to address this problem. Hence, the modified gravity increase method (MGIM), which can eliminate the error in the GIM, was developed by adding a correction factor to the friction angle during the gravity increase procedure. The MGIM was comparatively studied by applying the GIM, shear strength reduction method (SSR), and MGIM to homogeneous slope models under different dimensions, and an ACADS (Australian Computer Aided Design Society) test was introduced to validate the applicability of the MGIM to heterogeneous slopes. The analysis results proved that the MGIM does not have the inherent defect present in the GIM, and can provide accurate results in the stability analysis of both homogeneous slope and heterogeneous slopes with various slope angle and slope height. Finally, the MGIM and GIM were applied to the numerical analysis of a geotechnical centrifugal model test of a soil slope. The results indicate that the MGIM is capable of capturing the deformation and failure characteristic of geotechnical centrifugal model test of soil slopes.
ISSN:1435-9529
1435-9537
DOI:10.1007/s10064-018-1395-2