| 压力分散型锚索内力变化规律试验研究 |
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| 引用本文： | 刘鸿,周德培.压力分散型锚索内力变化规律试验研究[J].岩土力学,2012,33(4):1040-1044. |
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| 作者姓名： | 刘鸿 周德培 |
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| 作者单位： | 西南交通大学 岩土工程系，成都 610031 |
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| 摘 要： | 对压力分散型锚索的每个承载体单元采用了分级循环加载的方法，通过新的地质力学模型试验，研究压力分散型锚索各单元内力变化规律，并根据试验方法和压力分散型锚索锚固段的受力状态，导出了分级循环加载条件下接触面满足摩 尔-库仑强度条件时的弹性理论解。试验结果表明，在软岩和粉土地质条件下，前者的注浆体应变和剪应力分布相对后者比较集中，加载过程中单元间影响相对较小；基于摩尔-库仑准则的弹性理论解可以较好地描述锚索注浆体在分级循环加载后的应变和剪应力分布规律。研究结果对正确分析压力分散型锚索加固作用机制和锚固工程设计具有较好的参考价值。
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| 关 键 词： | 压力分散型锚索 模型试验 锚固机制 |
| 收稿时间： | 2011-04-21 |
Experiment research on change law of internal force of dispersed pressure anchor cable |
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| LIU Hong
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ZHOU Dei-pei.Experiment research on change law of internal force of dispersed pressure anchor cable[J].Rock and Soil Mechanics,2012,33(4):1040-1044. |
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| Authors: | LIU Hong ZHOU Dei-pei |
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| Institution: | Department of Geotechnical Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | Adopting the grading cyclic loading method in each bearing unit of dispersed pressure anchor cable,the changing law of internal force of each unit is studied by new geological mechanics model test.According to the test methods and the state of force of the dispersed pressure anchor cable,the elastic theoretical solution which is under the conditions of grading cyclic loading and based on the Mohr-Coulomb criterion is deduced.The test results show that,under the conditions of soft rock and silty soil,the strain and shear stress distribution of the former grouting body is relatively more concentrated,the influence between units is relatively minor during the loading process.And the elastic theoretical solution based on the Mohr-Coulomb criterion can describe the strain and shear stress distribution rule of grouting body better after grading cyclic loading.The research results have a good reference value for correctly analyzing reinforcing mechanism of the dispersed pressure anchor cable and engineering design. |
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| Keywords: | dispersed pressure anchor cable model test anchorage mechanism |
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