拉力型锚索预应力损失机理分析及防治技术研究

下载后可任意编辑拉力型锚索预应力损失机理分析及防治技术讨论拉力型锚索预应力损失机理分析及防治技术讨论 武岳彪 摘要：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，预应力锚索技术进展突飞猛进，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讨论为支撑，进一步探究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。 Abstract： 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. 关键词：拉力型锚索;预应力损失;防治技术 0 引言 预应力锚索施工对土体扰动小、可以根据需要灵活设置、施工进度快、成1下载后可任意编辑本低，开挖后能及时主动支护，改善岩土应力状态，发挥岩体自稳能力，有效控制变形。近年来以其独特的优势在边坡工程加固、基坑支护工程中占据了越来越重要的地位，发挥了不可替代的作用。 预应力锚索通过利用土体的自身阻抗去制约另一部分土体变形和结构破坏 ，在施工时根据锚索设计计算时提出的预应力施加值进行张拉和锁定，以更好地发挥锚索的制约系...