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一、等值法原理及其基本假定等K值法是将可能滑动岩体按断裂切割情况分为若干块刚体,其破坏形式为沿某些断裂、软弱夹层发生剪切破坏。假定在自重与外力作用下摩擦系数f和粘聚力c逐渐降低趋于失稳时,滑面上的反力将自动调整以抵抗下滑力,所有剪切面的抗剪强度(f、c)同时降低k倍,而每块各滑面都达到极限平衡状态,以此列出各块体的静力平衡方程式。其基本假定可概括为:
First, the principle of equivalence method and its basic assumptions K value method is to divide the possible sliding rock mass into several rigid bodies according to the situation of fracture cutting, and the failure form is shear failure of the weak interlayer along some faults. Assuming that the frictional coefficient f and the cohesion c decrease gradually when the self-weight and external force tend to become unstable, the reaction force on the sliding surface will be automatically adjusted to resist the sliding force. The shear strength of all the shear surfaces (f, c) While reducing k times, and each block has reached the limit equilibrium state, in order to list the static balance equation of each block. Its basic assumptions can be summarized as: