岩质边坡倾倒变形机理及稳定性研究综述
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摘要
倾倒破坏是岩质边坡的一种典型失稳模式,目前对于岩质边坡倾倒变形的稳定性分析与评价仍存在很多问题与争议。本文在回顾和总结国内外边坡倾倒失稳案例的基础上,阐述了岩质边坡倾倒变形的分类和破坏机理。从块体倾倒、弯曲倾倒、块体—弯曲倾倒和次生倾倒的角度详细介绍了倾倒边坡解析方法的研究现状,进一步论述了数值方法和物理模型试验的研究进展。基于悬臂梁力矩平衡思路,提出了岩质边坡弯曲倾倒的解析方法。最后,讨论了各种稳定性分析方法的不足与适用性,指出了以后研究的重点和有待深入探讨的问题。
Toppling failure is a typical instability mode of rock slope. At present,there are still many problems and disputes about the stability analysis and evaluation of rock slope toppling. On the basis of reviewing the cases of toppling instability at home and abroad, the classification and failure mechanism of toppling deformation of rock slope are expounded. Furthermore,the research status of analytical methods for toppling slope is introduced from the perspectives of block toppling,flexual toppling,block-flexual toppling and secondary toppling,and the research progress of numerical methods and physical model tests are further discussed. Based on the idea of moment balance of cantilever beam,an analytic method for flexual toppling is proposed. Finally,the shortcomings and applicability of each analysis method are pointed out,the future research emphases and the problems which need deeply discussing are explained.
Toppling failure is a typical instability mode of rock slope. At present,there are still many problems and disputes about the stability analysis and evaluation of rock slope toppling. On the basis of reviewing the cases of toppling instability at home and abroad, the classification and failure mechanism of toppling deformation of rock slope are expounded. Furthermore,the research status of analytical methods for toppling slope is introduced from the perspectives of block toppling,flexual toppling,block-flexual toppling and secondary toppling,and the research progress of numerical methods and physical model tests are further discussed. Based on the idea of moment balance of cantilever beam,an analytic method for flexual toppling is proposed. Finally,the shortcomings and applicability of each analysis method are pointed out,the future research emphases and the problems which need deeply discussing are explained.
引文
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