{"title":"Double Strength Reduction Method for Carbonaceous Rock Slope Considering Influence of Disintegration Degree","authors":"Zhao Li, Peng Mo, Junhui Luo, Shihai Wang, Zhenchao Chang, Haifeng Huang","doi":"10.1007/s11204-024-09963-x","DOIUrl":null,"url":null,"abstract":"<p>To investigate the folding-down mechanism of the shear strength parameters under the disintegration of carbonaceous rock slopes, carbonaceous rock shear strength tests under different disintegration times were conducted, and the principle of carbonaceous rock disintegration was elucidated through microscopic analysis. The reduced relationship between <i>c</i> and <i>φ</i> was derived with consideration to the degree of disintegration, and an early warning displacement inflection point method considering the maximum slope displacement and plastic shear strain is proposed as the slope instability criterion. Numerical examples demonstrate that the proposed method fully considers the attenuation law of the strength parameters of carbonaceous rocks in the calculation, and effectively solves the difficult problem of determining the reduction relationship using the double reduction coefficient method.</p>","PeriodicalId":21918,"journal":{"name":"Soil Mechanics and Foundation Engineering","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soil Mechanics and Foundation Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s11204-024-09963-x","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
引用次数: 0
Abstract
To investigate the folding-down mechanism of the shear strength parameters under the disintegration of carbonaceous rock slopes, carbonaceous rock shear strength tests under different disintegration times were conducted, and the principle of carbonaceous rock disintegration was elucidated through microscopic analysis. The reduced relationship between c and φ was derived with consideration to the degree of disintegration, and an early warning displacement inflection point method considering the maximum slope displacement and plastic shear strain is proposed as the slope instability criterion. Numerical examples demonstrate that the proposed method fully considers the attenuation law of the strength parameters of carbonaceous rocks in the calculation, and effectively solves the difficult problem of determining the reduction relationship using the double reduction coefficient method.
为研究碳质岩边坡崩解作用下抗剪强度参数的折减机理，进行了不同崩解时间下的碳质岩抗剪强度试验，通过微观分析阐明了碳质岩崩解原理。在考虑崩解程度的前提下，得出了 c 与 φ 之间的还原关系，并提出了一种考虑最大边坡位移和塑性剪切应变的预警位移拐点法作为边坡失稳标准。数值实例表明，所提出的方法在计算中充分考虑了碳质岩石强度参数的衰减规律，有效地解决了利用双折减系数法确定折减关系的难题。
期刊介绍：
Soil Mechanics and Foundation Engineering provides the Western engineer with a look at Russian advances in heavy construction techniques. Detailed contributions by experienced civil engineers offer insights into current difficulties in the field, applicable innovative solutions, and recently developed guidelines for soil analysis and foundation design.
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