岩体锚索预应力筋材料强度利用系数探讨

首先系统总结了当前锚索预应力筋材料强度利用的设计理论与一般取值标准，并分析了预应力筋材料强度利用系数与锚筋及锚固体系安全度的相关性。进而系统论述了影响岩体锚索预应力筋应力的基本因素，并在此基础上结合工程数据论证分析，提出了依据目前的设计标准，我国岩体预锚工程应用中普遍存在锚索材料安全度偏低的问题，并分析了问题的严重性。最后通过分析研究，提出了笔者对我国岩体锚索预应力筋强度利用取值的看法与建议。

On strength utilization coefficient of prestressed steel wires of anchorage cables in rock mass

Design theories of material strength utilization of prestressed steel wires of anchorage cables and their standards for taking design values are firstly summarized,and the correlation between the materials strength utilization coefficient of prestressed steel wires and the safety of anchor steel wire and anchorage system is analyzed.Basic factors affecting the stress of prestressed steel wires of anchorage cables in rock mass are systematically expounded.On the basis of analyzing data obtained from practical anchorage works,there commonly arise problems on low safety of anchorage cable materials in the application of prestressd anchorage in rock mass which is designed in accordance with present design standards in China.Severe consequences of low-safety anchorage cables are also analyzed.Through analysis and investigation,some opinions and proposals are put forward on utilization coefficients of the strength of prestressed steel wires of anchorage cables in rock mass in China.