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该文分析了经典小变形理论在大变形中运用的不合理性 ,阐明了大变形发生的基本条件和破坏机理 ,提出了以剪切变形产生破坏、断裂分段是围岩大变形的形质准则 ;以岩体内的应变 (应力 )流线产生“台阶”现象作为工程研究中产生大变形的判别依据 ;用锚杆穿越剪切错动分离面 ,阻止“台阶”处剪切错动分离面的产生和发展 ,作为治理大变形的主要工程手段。
This paper analyzes the irrationality of the application of classical small deformation theory in large deformation, clarifies the basic conditions and failure mechanism of large deformation, and presents the damage caused by shear deformation. Criterion is used to generate the “step” phenomenon by the streamline of strain (stress) in the rock mass as the criterion for the large deformation in the engineering research. The bolt is used to cross the shear separation surface to prevent the shear separation of the “step” The emergence and development of the surface, as the major engineering measures to deal with the great deformation.