拉力型锚索预应力损失机理分析及防治技术研究

Study on Mechanism Analysis and Prevention Technology of Prestress Loss of Tensile Anchor Cable

预应力锚索是一种主动支护结构,通过主动施加预应力,压缩土体,改善岩土性能,提高其抗剪强度,充分发挥其自稳潜力,有效控制结构变形。近年来,预应力锚索技术发展突飞猛进,应用日趋广泛,然而因锚索预应力损失而导致的损失或引发的事故屡见报端、触目惊心,必须予以高度关注。本文在以前人对锚索预应力损失的研究为支撑,进一步探索预应力损失的关键因素,提出防治措施,增强预应力锚索的可靠性、安全性与稳定性。

The prestressed anchor cable is an active supporting structure.By actively applying prestress,it compresses the soil,improves the geotechnical properties,improves its shear strength,fully exerts its self-stabilizing potential,and effectively controls the deformation of the structure.In recent years,the development of prestressed anchor cable technology has advanced by leaps and bounds,and its application is becoming more and more widespread.However,the loss or accident caused by the loss of prestressed anchor cable has been reported frequently and shocked,and must be highly concerned.This article is supported by previous research on the prestressed loss of the anchor cable,further explores the key factors of the prestressed loss,and proposes preventive measures to enhance the reliability,safety and stability of the prestressed anchor cable.