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让压锚杆能量本构模型及支护参数设计(单仁亮 中国矿业大学学报).doc


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Equation Chapter 0 Section 1 让压锚杆能量本构模型及支护参数设计单仁亮,杨昊(中国矿业大学(北京) 力学与建筑工程学院北京 100083. ) 摘要:以让压锚杆为依托,介绍其几何模型,工作原理,受力状态。分别对让压锚杆和普通锚杆进行常温拉拔试验,分析力学特性,计算让压锚杆在弹性阶段,让压阶段和塑性阶段的能量本构模型。近似求解两种锚杆在设计荷载极限状态,承载力极限状态,以及考虑围岩卸载作用时设计荷载条件下的支护强度。实验结果表明:在三种不同极限状态下,让压锚杆的支护强度均大于普通锚杆。最后,依据组合拱理论给出了让压锚杆设计参数的相关计算公式,为让压锚杆的支护设计提供理论依据。关键字: 让压锚杆,能量本构模型,力学分析,支护参数计算。中文分类号:T P212 文件标识码:A 文章编号: D esign of support parameter and energy constitutive model of yielding anchor bolt SHAN Renliang ,Y ANG Hao (School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083 .) Abstract : This paper mainly introduces geometric model, working principle and force state of yielding anchor bolt. Some pull-out tests of yielding anchor bolt mon bolt are carried out at normal temperature to analyze their stress characters and calculate the energy constitutive models of yielding anchor bolt in elastic stage, release-pressure stage and plastic stage. Approximate solutions of support strength of this two type bolt are calculated under limit state of design load, bearing capacity and considering surrounding rock unloading effect. The results show that support strength of yielding anchor bolt is always greater mon bolt under the three limit states. Eventually, some relevant calculating formulae of yielding anchor bolt ’s design parameter based bined arch theory are given which provide theory support

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  • 时间2017-05-16