首页|A Method for Evaluating the Maximum Bending Degree of Flexural Toppling Rock Masses Based on the Rock Tensile Strain-Softening Model

A Method for Evaluating the Maximum Bending Degree of Flexural Toppling Rock Masses Based on the Rock Tensile Strain-Softening Model

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Flexural toppling occurs when a series of layered rock masses bend towards their free face.It is important to evaluate the maximum bending degree and the requirement of supports of flex-ural toppling rock mass to prevent rock mass cracking and even failure leading to a landslide.Based on the rock tensile strain-softening model,this study proposes a method for calculating the maximum cur-vature(Cppmax)of flexural toppling rock masses.By applying this method to calculate Cppm-of 9 types of rock masses with different hardness and rock layer thickness,some conclusions are drawn:(1)the in-ternal key factors affecting Cppmax are E*(E*=Egs/E0,where E0 and Ess are the mean deformation moduli of the rock before and after reaching its peak tensile strength,respectively),the strain εt corresponding to the tensile strength of rock,and the thickness(h)of rock layers;(2)hard rock layers are more likely to develop into block toppling than soft rock layers;and(3)thin rock layers are more likely to remain in flexural toppling state than thick rock layers.In addition,it is found that Cppmax for flexural toppling rock masses composed of bedded rocks such as gneiss is related to the tensile direction.

flexural topplingrock massmaximum bending degreestrain-softening modelcurva-turerock mechanics

Jiongchao Wang、Jun Zheng、Jichao Guo、Qing Lü、Jianhui Deng

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Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China

Center for Balance Architecture,Zhejiang University,Hangzhou 310007,China

State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource and Hydropower Sichuan University,Chengdu 610065,China

National Natural Science Foundation of ChinaZhejiang Provincial Natural Science Foundation of ChinaKey R&D Project of Zhejiang Province

41972264LR22E0800022021C03159

2024

10.1007/s12583-022-1805-z

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(4)
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