Study on the limit equilibrium slice method considering characteristics of inter-slice normal forces distribution: the improved Spencer method

The limit equilibrium slice method is a universal method to determine the safety factor of a slope. However, the forms of the inter-slice normal forces distribution are not considered in the traditional limit equilibrium slice method, and the influence of different positions of thrust lines on the s...

Full description

Saved in:
Bibliographic Details
Published in:Environmental earth sciences 2019-10, Vol.78 (20), p.1-18, Article 611
Main Authors: Wu, Shunchuan, Han, Longqiang, Cheng, Ziqiao, Zhang, Xiaoqiang, Cheng, Haiyong
Format: Article
Language:English
Subjects:
Biogeosciences
Case studies
Distribution
Earth and Environmental Science
Earth Sciences
Economic benefits
Environmental Science and Engineering
Equilibrium
Geochemistry
Geology
Hydrology/Water Resources
Impact analysis
Original Article
Safety
Safety engineering
Safety factors
Slice method
Stress concentration
Stress state
Terrestrial Pollution
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 limit equilibrium slice method is a universal method to determine the safety factor of a slope. However, the forms of the inter-slice normal forces distribution are not considered in the traditional limit equilibrium slice method, and the influence of different positions of thrust lines on the safety factor is not considered. Thus, an improved Spencer method is developed here, wherein the characteristics of the inter-slice normal forces distribution are considered. The safety factor of a deep concave sliding surface is calculated, and a difference of approximately 20% is found between the safety factors that are obtained using the improved method and those obtained using the traditional method. The influence rule of different forms of the inter-slice normal forces distribution on the safety factor has been studied, and the influences of various factors on the inter-slice forces contribution, the stress state of the slice and the stress state of the slip surface have been analysed. Finally, two case studies are combined to illustrate the impact of the improved method on engineering safety and economic benefits.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-019-8621-5