| 极限状态下岩体受拉锚杆锚固承载力的计算 |
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| 引用本文： | 王欣,刘晓春.极限状态下岩体受拉锚杆锚固承载力的计算[J].山西建筑,2009,35(30):125-126. |
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| 作者姓名： | 王欣 刘晓春 |
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| 作者单位： | 1. 中信国华国际工程承包公司巴西火电厂项目部,北京,100004
2. 中南大学土木建筑学院,湖南长沙,410075 |
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| 摘 要： | 从分析岩体中受拉锚杆的锚固机理及破坏形态出发,研究了承载能力极限状态下受拉锚杆的受力模型,建议在锚杆的锚固承载力计算公式中考虑锚固长度对平均粘结强度的影响,推导了能够反映极限状态下剪力传递机理的受拉锚杆锚固承载力计算公式,并结合岩壁吊车梁受拉锚杆锚固的工程实例与GB 50086公式的计算结果进行了比较、分析和探讨。
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| 关 键 词： | 受拉锚杆 锚固长度 受力模型 承载力 |
Anchoring capacity of tensile rock bolt in ultimate limit state |
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| WANG Xin,LIU Xiao-chun.Anchoring capacity of tensile rock bolt in ultimate limit state[J].Shanxi Architecture,2009,35(30):125-126. |
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| Authors: | WANG Xin LIU Xiao-chun |
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| Affiliation: | WANG Xin,LIU Xiao-chun |
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| Abstract: | Based on the analysis of anchorage mechanism and failure mode of tensile rock bolt, the mechanical model of tensile rock bolt in ultimate limit state was investigated. The effect of anchorage length on average bond strength was proposed to he considered in the anchoring capacity calculation formulas of rock bolt. A series of anchoring capacity calculation formulas of tensile rock bolt which reflects the shear stress transfer mechanism in ultimate limit state were derived. Combined with the engineering practice of tensile bolt anchorage in rock-bolt crane beam, the derived formulas were analyzed and discussed comparing with GB 50086. |
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| Keywords: | tensile bolt anchorage length mechanical model load carrying capacity |
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