【摘要】 预应力锚索结构的预应力损失问题是造成锚索失效的关键问题。在具体分析影响预应力损失的各种因素的基础上,给出了各因素导致预应力损失的具体计算方法。特别对长期荷载下预应力损失机理进行了分析,其中钢绞线采用松弛模型;围岩体采用流变模型;灌浆材料采用蠕变模型进行预测。并给出了相应的理论计算公式,为预应力锚索设计、施工以及工后管理等提供了理论依据。更多还原

【Abstract】 The pretress loss of anchor cable is the key cause induced the anchor structure failure;based on investigating all influencing factors,a method for calculating prestress loss is put forward;the influencing factors of prestress loss of anchor cable under long-term loading are analyzed;the relaxation model of steel strand,rheological model of rock as well as creep damage model of grouted material are put forward respectively;and using these theory to predict the prestress loss of anchor cable.There are the significant-sense to design and manage anchor cables.更多还原