摘要
采用数值仿真试验的方法,对锚索预应力及其损失的变化规律进行了研究。研究结果表明,锚索锁定后,锚索预应力的变化是由锚索和被锚介质相互作用造成的,锚索预应力的变化经过下降、回升和稳定三个阶段,期间预应力损失的主要原因是外锚头附近岩体的徐变。同时,对比分析了超张拉和补偿张拉对预应力损失的改善,为预应力锚固的工程设计和理论研究提供了参考作用。
By the use of the method of numerical simulation,prestress and loss of prestress change of anchorage cable is researched.The results of research indicate that after anchorage cable is locked,prestress change of anchorage cable is caused by the interaction of anchorage cable and anchored medium.Prestress change of anchorage cable undergoes decrease、raise and steady phases and the primary reason of loss of prestress is the creep of rock mass near outer anchor.Simultaneously improvement of loss of prestress is contrasted in the case of extra prestress and compensation tension.A reference can be provided for the engineering design and theoretical study.
出处
《中国矿业》
北大核心
2010年第10期91-93,100,共4页
China Mining Magazine
关键词
预应力损失
锚固系统
超张拉
补偿张拉
数值试验
loss of prestress
anchorage
system
extra prestress
compensation tension
numerical experiments
