Discontinuous Deforma tion Analysis of Progressive Toppling of Rock Slopes with Fractured Slab Structure

Authors

YUAN Sifan, School of Geological Engineering and Geomatics , Chang ’an University , Xi’an, Shaanxi 710054 , China ;Observation and Research Station of Water Cycle and Geological Environment for th e Chinese Loess Plateau , Ministry of Education , Zhengning , Gansu 745399 , ChinaFollow
LI Tonglu, School of Geological Engineering and Geomatics , Chang ’an University , Xi’an, Shaanxi 710054 , China ;Observation and Research Station of Water Cycle and Geological Environment for th e Chinese Loess Plateau , Ministry of Education , Zhengning , Gansu 745399 , ChinaFollow
Haider Mumtaz, School of Geological Engineering and Geomatics , Chang ’an University , Xi’an, Shaanxi 710054 , China ;Observation and Research Station of Water Cycle and Geological Environment for th e Chinese Loess Plateau , Ministry of Education , Zhengning , Gansu 745399 , China
ZHANG Changliang, School of Geological Engineering and Geomatics , Chang ’an University , Xi’an, Shaanxi 710054 , China ;Observation and Research Station of Water Cycle and Geological Environment for th e Chinese Loess Plateau , Ministry of Education , Zhengning , Gansu 745399 , China
LI Ping, School of Geological Engineering and Geomatics , Chang ’an University , Xi’an, Shaanxi 710054 , China ;Observation and Research Station of Water Cycle and Geological Environment for th e Chinese Loess Plateau , Ministry of Education , Zhengning , Gansu 745399 , China

Corresponding Author

李同录，男，博士，教授.E-mail：dcdgx08@chd.edu.cn

Abstract

Progressive toppling of rock sl opes with fractured slab structures is quite common in the slopes of hydropower and highway engineering,posing a potential safety risk during both construction and operational phases.The field investigation found that progressive toppling mostly occurs on slopes with concentrated tectonic stress,intense river incision,and high steepness.Typically,these slopes are composed of hard,thinly-layered,and overthrusted rock mass with a fractured slab structure.From a macroscopic point of view,progressive toppling failure is neither a collapse nor a slide but a form of discontinuous deformation.The traditional limit equilibrium method for slope stability analysis is not suitable for evaluating such slopes.In this paper,by taking the progressive toppling of the slopes along the G 108 Highway in the Qinling Mountains as an example and considering the uplift of the mountain and river downcutting,a discontinuous deformation analysis (DDA ) method was employed to simulate the entire process of progressive toppling,and the mechanisms of its evolution were analyzed.The results show that as the river downcutting progresses,the rock mass experiences interlayer shearing along bedding planes under the influence of gravity,gradually tilting toward the river valley.Once a through-going rupture area develops,it transforms into a landslide failure.For the evaluation of such slopes,a numerical model should be used to simulate the entire deformation failure process.This allows for the estimation of the current state and development trends,providing a basis for reinforcement and management.

Publication Date

6-23-2025

DOI

10.14048/j.issn.1671-2579.2025.03.001

First Page

1

Last Page

8

Submission Date

August 2025

Recommended Citation

Sifan, YUAN; Tonglu, LI; Mumtaz, Haider; Changliang, ZHANG; and Ping, LI (2025) "Discontinuous Deforma tion Analysis of Progressive Toppling of Rock Slopes with Fractured Slab Structure," Journal of China & Foreign Highway: Vol. 45: Iss. 3, Article 1.
DOI: 10.14048/j.issn.1671-2579.2025.03.001
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss3/1

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