Extension of Spencer’s Circular Model to Stability Analysis of Landslides with Multicircular Slip Surfaces

This paper presents a new limit equilibrium method based on analysis of landslides with multicircular slip surfaces in the Three Gorges Reservoir area, China. An important innovation of this method is that the rigid sliding mass is divided into numerous interrelated Spencer’s circles sharing the sam...

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Published in:Mathematical problems in engineering 2020, Vol.2020 (2020), p.1-22
Main Authors: Tan, Qinwen, Zheng, Yanhao, Yang, Yingming, Tang, Huiming, Fan, Zhiqiang, Wen, Tao
Format: Article
Language:English
Subjects:
Concavity
Equilibrium
Failure
Landslides
Landslides & mudslides
Sliding
Slip
Slope stability
Stability analysis
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container_issue 2020
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creator Tan, Qinwen
Zheng, Yanhao
Yang, Yingming
Tang, Huiming
Fan, Zhiqiang
Wen, Tao
description This paper presents a new limit equilibrium method based on analysis of landslides with multicircular slip surfaces in the Three Gorges Reservoir area, China. An important innovation of this method is that the rigid sliding mass is divided into numerous interrelated Spencer’s circles sharing the same factor of stability, so that each of them possesses a real centre of rotation and an independent inclination of interslice forces. The analysis is accomplished by iterations to satisfy both force and moment equilibrium for each circle. Two real cases were then adopted to verify the effectiveness of the method in the analysis of both slope stability and the design forces on piles. Factors influencing the performance of the method were also investigated, which reveal that the concavity of the local slip surface near the slope toe has a major impact. The importance of the proximity between the actual and the fitted sliding surfaces was highlighted for ensuring accuracy of the method when extended to the real cases.
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subjects Concavity
Equilibrium
Failure
Landslides
Landslides & mudslides
Sliding
Slip
Slope stability
Stability analysis
title Extension of Spencer’s Circular Model to Stability Analysis of Landslides with Multicircular Slip Surfaces
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