| 锚杆–砂浆界面黏结滑移关系的试验研究与破坏过程解析 |
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| 引用本文： | 刘波,李东阳,段艳芳,金光玲,田宁. 锚杆–砂浆界面黏结滑移关系的试验研究与破坏过程解析[J]. 岩石力学与工程学报, 2011, 30(Z1): 2790-2797 |
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| 作者姓名： | 刘波 李东阳 段艳芳 金光玲 田宁 |
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| 作者单位： | (1. 中国矿业大学 力学与建筑工程学院，北京 100083；2. 中国矿业大学 深部岩土力学与地下工程国家重点实验室，北京 100083) |
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| 基金项目： | 国家自然科学基金资助项目(50974126); 教育部新世纪优秀人才支持计划项目(NCET-08-0835),教育部科学技术研究重点项目(109034) |
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| 摘 要： | 为研究岩石基础锚杆与砂浆界面的黏结滑移关系，分别进行室内短锚中心拉拔试验和现场长锚拉拔试验。在室内试验中，利用配置的6种水泥砂浆分析水泥砂浆强度和含砂率对黏结滑移关系的影响，得到试验的最优配合比。根据局部变形理论，建立能够描述长锚杆受上拔荷载作用时，锚杆–砂浆界面经历弹性状态、塑性软化和开裂滑移3个阶段的数学模型。应用该模型分析现场长锚杆试验数据，计算结果表明：(1) 当上拔荷载小于弹性极限荷载时，有效锚固长度为一恒定值，否则有效锚固深度将开始增加；(2) 当上拔荷载大于弹性极限荷载后，轴力F随深度z的衰减程度将因上部界面的软化和开裂而放缓。最后，得出有效锚固深度随上拔荷载增大而增加的计算公式。
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| 关 键 词： | 岩石力学锚杆水泥砂浆黏结滑移锚固深度剪切刚度 |
| 收稿时间： | 2010-04-06; |
EXPERIMENTAL STUDY OF BOND-SLIP RELATIONSHIP BETWEEN BOLT AND MORTAR AND THEORETICAL SOLUTION TO FAILURE PROCESS |
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| LIU Bo,,LI Dongyang,DUAN Yanfang,JIN Guangling,TIAN Ning. EXPERIMENTAL STUDY OF BOND-SLIP RELATIONSHIP BETWEEN BOLT AND MORTAR AND THEORETICAL SOLUTION TO FAILURE PROCESS[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(Z1): 2790-2797 |
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| Authors: | LIU Bo LI Dongyang DUAN Yanfang JIN Guangling TIAN Ning |
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| Affiliation: | (1. School of Mechanics and Civil Engineering，China University of Mining and Technology，Beijing 100083，China；2. State Key Laboratory of Geomechanics and Deep Underground Engineering，China University of Mining and Technology，Beijing 100083，China) |
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| Abstract: | To research the bond-slip relationship between the bolt and mortar for rock foundation,the pullout test for short bolt in laboratory and uplift test for long bolt in field were carried out respectively.In laboratory,6 kinds of mortar were mixed to analyze the effect of the compressive strength and sand ratio of mortar on bold-slip relationship.Then,the best mix proportion is presented.Based on the local deformation theory,a mathematics model is built,and it can describe the change process of bolt-mortar int... |
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| Keywords: | rock mechanics bolt mortar bond-slip anchorage depth shear stiffness |
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