软岩边坡锚索预应力定量损失规律研究

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Abstract Prestressed anchor-cable is one of the most effective means of permanent rock slope reinforcement；but it’s difficult to guarantee the anchoring effect due to the loss of prestress. This paper is based on some highway soft rock slope support engineering，by field measurement analysis，obtained the quantitative prestress loss law. Prestress loss can be divided into instantaneous loss and time loss. The former，caused by strand retraction，can reach about 8% of the initial tensile load. The latter can be divided into short-term and long-term losses，and can reach about 15% of the initial tensile load. The results not only provides theoretical basis for the prestressed anchor rope tensioning and quantitative compensation tensioning，but also provide useful reference for similar soft rock slope support project.

Key words： slope engineering soft rock slope support prestressed anchor cable prestress loss quantitative law

Received: 26 October 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I8/1685

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