Analysis of Re-Tensioning Time of Anchor Cable Based on New Prestress Loss Model

Keyou Shi, Xiaoping Wu, Yurong Tian and Xiaotian Xie
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Keyou Shi: School of Civil Engineering, Central South University, Changsha 410075, China
Xiaoping Wu: School of Civil Engineering, Central South University, Changsha 410075, China
Yurong Tian: School of Civil Engineering, Central South University, Changsha 410075, China
Xiaotian Xie: School of Civil Engineering, Central South University, Changsha 410075, China

Mathematics, 2021, vol. 9, issue 10, 1-12

Abstract: 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.

Keywords: prestress of anchor cable; creep model of rock mass; prestress loss model; prestress compensation; prestress loss (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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