考虑边坡蠕变的锚索预应力损失分析

Analysis of Anchor Cable Prestress Loss Under the Condition of Considering Slope Creep

岩体蠕变是锚索预应力损失的主要来源。论文采用广义开尔文模型模拟蠕变介质,考虑锚索与蠕变介质的耦合作用,建立了锚索与边坡蠕变耦合作用模型,推导了预应力损失理论计算公式。应用论文提出的公式计算结果与实际监测结果对比基本吻合。论文提出的考虑边坡蠕变的锚索预应力损失计算公式,可为工程中锚索预应力损失的评估提供参考。

Rock mass creep is the main source of anchor cable prestress loss. In this paper, the generalized Kelvin simulation creep medium is used to consider the coupling effect between anchor cable and creep medium. The coupling model of anchor cable and slope creep is established, and the theoretical calculation formula of prestress loss is derived. The calculation results using the formula proposed in this paper are basically consistent with the actual monitoring results. The calculation formula of anchor cable prestress loss considering slope creep proposed in this paper can provide reference for the evaluation of anchor cable prestress loss in engineering.