Considering the interaction among anchor cable, frame beam and rock mass, a new model of prestress loss of anchor cable was established. The accuracy and applicability of the new model were verified by comparing the field monitoring data and the calculation results of existing models. In addition, based on the new model, the effect of the re-tension of the anchor cable at different time nodes was analyzed, and the later compensation time of anchor cable prestress was discussed. The research shows that: the accuracy of the new model is higher after considering the effect of the frame beam, the new model can not only calculate the loss of prestress of anchor cable, but also accurately predict the time when the prestress of anchor cable reaches the stable stage. The ideal effect of prestress compensation can be achieved when the anchor cable is re-tensioned at each time point after 20 days of the construction completed. The original prestress loss of the anchor cable is different, and the re-tension effect is also different, the greater the loss of the original prestress of the anchor cable, the more obvious the prestress compensation effect during the re-tension.

中文翻译：

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基于新的预应力损失模型的锚索重张时间分析

考虑到锚索，框架梁和岩体之间的相互作用，建立了锚索预应力损失的新模型。通过比较现场监测数据和现有模型的计算结果，验证了新模型的准确性和适用性。此外，基于新模型，分析了锚索在不同时间节点的再张紧力的影响，并讨论了锚索预应力的后期补偿时间。研究表明：考虑框架梁的影响，新模型的精度较高，不仅可以计算锚索的预应力损失，还可以准确预测锚索预应力达到的时间。稳定的阶段。在施工20天后的每个时间点重新锚定锚索时，可以实现理想的预应力补偿效果。锚索的原始预应力损失是不同的，再拉伸效果也不同，锚索的原始预应力的损失越大，再拉伸过程中的预应力补偿效果就越明显。