| 锚杆锚固质量动测法底端反射显现规律研究 |
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| 引用本文： | 刘海峰,杨维武,李义.锚杆锚固质量动测法底端反射显现规律研究[J].辽宁工程技术大学学报(自然科学版),2004,23(1):41-43. |
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| 作者姓名： | 刘海峰 杨维武 李义 |
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| 作者单位： | 1. 宁夏大学,土木工程系,宁夏,银川,750021
2. 太原理工大学,矿业工程学院,山西,太原,030024 |
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| 基金项目： | 宁夏大学科学研究基金资助项目(023402) |
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| 摘 要： | 根据锚固体系的锚杆动力学及应力波运动学理论，运用应力波反射法，通过分段截取，在自制的模拟试件上进行了大量实验研究，得出了锚杆底端反射的显现与锚杆自由段长度、锚固段长度、波长之间的定量关系：对于水泥锚杆，当自由段长度等于2．5倍波长，或2．87倍锚固段长度，对于树脂锚杆，当自由段长度等于2．5倍波长，或5．882倍锚固段长度时，底端反射消失，并给出了在工程实践中彻底解决锚杆锚固质量动态检测底端反射问题的方法和途径。
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| 关 键 词： | 锚杆 底端反射 显现规律 动态测试 锚固质量 |
| 文章编号： | 1008-0562(2004)01-0041-03 |
| 修稿时间： | 2002年12月13 |
Laboratory study on occurrence of bottom reflection by dynamical test about rock bolt bonding integrity |
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| LIU Hai-feng,YANG Wei-wu ,LI Yi.Laboratory study on occurrence of bottom reflection by dynamical test about rock bolt bonding integrity[J].Journal of Liaoning Technical University (Natural Science Edition),2004,23(1):41-43. |
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| Authors: | LIU Hai-feng YANG Wei-wu LI Yi |
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| Institution: | LIU Hai-feng1,YANG Wei-wu 1,LI Yi2 |
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| Abstract: | Based on dynamics of rock bolt and kinematics of stress wave in grouted bolt system, the sample models made by ourselves are studied in detail by means of stress wave reflection method. We find out the relation between bottom reflection and the length of free section and anchor length and wave band,When the ratio of free part length to wave length is 2.5 or the ratio of free part length to anchorage part length is 2.87 in cement bolt and the ratio of free part length to wave length is 2.5 or the ratio of free part length to anchorage part length is 5.882 in resin bolt, the bottom reflection disappears. At the same time ,we provide the approach to locate bottom reflection in bolt bonding integrity dynamical tests in practice. |
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| Keywords: | rock bolt bottom reflection dynamical test |
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