| 压力型锚索锚固段剪应力数学解 |
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| 引用本文： | 赵圳,许明.压力型锚索锚固段剪应力数学解[J].路基工程,2021,0(2):31-34. |
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| 作者姓名： | 赵圳 许明 |
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| 作者单位： | 1.重庆大学土木工程学院，重庆 400045 |
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| 基金项目： | 国家自然科学基金项目（51779021） |
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| 摘 要： | 针对压力型锚索，考虑钻孔注浆的挤压效应和锚索锚固段与岩土体接触面的黏聚力对锚固段的剪应力和轴力的影响，引入强度折减系数，对接触面黏聚力和摩擦角进行强度折减；通过理论分析及数学推导，得到压力型锚索锚固段的剪应力和轴力分布的数学表达式，并与学者尤春安提出的公式进行对比分析。结果表明:引入强度折减系数以后，所得到的剪应力值较大，轴力值较小，预应力损失值增快。因此，在实际设计中要合理地考虑锚固段的长度，使剪应力、轴力的存在长度能够完全在锚固段以内。
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| 关 键 词： | 压力型锚索 理论分析 数学解 折减系数 剪应力 轴力 |
| 收稿时间： | 2020-05-08 |
Mathematical Solution of Shear Stress in Anchoring Section of Pressure Anchor Cable |
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| Abstract: | For pressure anchor cable, considering the squeezing effect of borehole grouting and cohesion of anchoring section of anchor cable and rock soil interface, for the influence of shear stress and axial force of anchoring section and the introduction of the strength reduction factor, for interface cohesion and friction angle strength degradation, through the theoretical analysis and mathematical deduction, the mathematical expressions of shear stress and axial force distribution in the anchoring section of pressure anchor cable are obtained and compared with the formulas put forward by the scholar You Chun ′an. The result shows that after the strength reduction coefficient is introduced, the obtained shear stress value is larger, the axial force value is smaller, and the prestress loss value increases rapidly. Therefore, the length of the anchoring section should be considered reasonably in the actual design, so that the existing length of the shear stress and axial force can be completely within the anchoring section. |
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