Abstract
The establishment of the prestressed cable loss prediction model is a difficult problem faced by the popularization and use. This article aims at the problem of the loss of anchor cable prestress over time in the soil‐rock dual‐structure slope. We relied on the soil‐rock dual‐structure slope treatment project of section K5 + 220‐K5 + 770 of Jiangwen Expressway and monitored the prestress loss of the anchor cable in the slope through the anchor cable meter with built‐in vibrating wire sensor. Using regression analysis and segmented modelling methods, we established a comprehensive mathematical improvement model, analyzed the applicability of the improved model, and obtained the error range, 0.04%–8.9%. This work offers a new approach for predicting anchor cable prestress loss, which has certain practical value for the use of prestressed anchor cables.
Highlights
Slopes composed of an upper gravel soil layer and lower weathered bedrock layer are known as soil-rock dualstructure slopes
Engineering projects are typically difficult to implement on soil-rock dual-structure slopes, as poor design or construction work can lead to geological failures, such as landslides and slope collapses, which can threaten the safety of the project
Antislide piles and anchor cables are widely used in slope support and reinforcement structures because they can bear some of the sliding force of the slope and help prevent geological failure
Summary
Slopes composed of an upper gravel soil layer and lower weathered bedrock layer are known as soil-rock dualstructure slopes. Engineering projects are typically difficult to implement on soil-rock dual-structure slopes, as poor design or construction work can lead to geological failures, such as landslides and slope collapses, which can threaten the safety of the project. To address these challenges, antislide piles and anchor cables are widely used in slope support and reinforcement structures because they can bear some of the sliding force of the slope and help prevent geological failure. Due to the complexity of engineering geological conditions and the relaxation of the anchor cable itself, it is difficult to calculate the prestress loss of the anchor cable. Brahim and Ballivy [2] conducted a five-year monitoring project on the prestress of nine anchor cables
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