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本文介绍了天福庙拱坝坝肩岩体稳定性研究,并提出了相应加固措施的建议。即在详尽的工程地质水文地质调查的基础上分析出各种可能的失稳机制,并组合出各种滑移边界条件;通过现场和室内岩体力学试验,测出构成边界条件的各种地质结构面的抗剪强度和变形常数;通过三维有限元弹性分析计算,得到应力应变和破损区的分布,检验了失稳机制和边界条件的合理性;通过刚体极限平衡法,计算出各种荷载和边界条件组合情况下的抗滑稳定安全系数;尔后针对最不稳定边界条件及其控制稳定性的主要因素,提出有效的加固措施的建议。文中还讨论了岩体和各种软弱结构面抗剪强度的取值原则、试验值的使用原则以及非均质结构面和组合结构面的综合抗剪强度问题。
In this paper, the stability of the Tianfumiao arch dam abutment rock is introduced, and the corresponding reinforcement measures are proposed. On the basis of a detailed geological survey of engineering geology and hydrology, various possible destabilization mechanisms are analyzed and various slip boundary conditions are combined. Through the on-site and indoor rock mechanics tests, various geologies that constitute the boundary conditions are measured. Shear strength and deformation constants of the structural planes; through the three-dimensional finite element elastic analysis, the distributions of stress, strain, and failure zones were obtained, and the rationality of the instability mechanism and boundary conditions were examined; various loads were calculated by the rigid body limit equilibrium method. In combination with the boundary conditions, the stability-resistant safety factor for anti-sliding conditions, and then the main factors for the most unstable boundary conditions and their control stability, proposes effective reinforcement measures. The paper also discusses the principle of the value of shear strength of rock masses and various weak structural planes, the principle of the use of experimental values, and the comprehensive shear strength of heterogeneous structural planes and composite structural planes.