| 土层灌浆锚杆的蠕变损伤特性研究 |
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| 引用本文： | 许宏发,卢红标,钱七虎.土层灌浆锚杆的蠕变损伤特性研究[J].岩土工程学报,2002,24(1):61-63. |
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| 作者姓名： | 许宏发 卢红标 钱七虎 |
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| 作者单位： | 解放军理工大学工程兵工程学院人防工程系；解放军理工大学工程兵工程学院人防工程系 江苏南京210007.南京大学地球科学系；江苏南京210093；江苏南京210007； |
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| 摘 要： | 蠕变行为是土层锚杆拉拔的重要特征之一。根据砂浆锚杆的抗拔蠕变试验 ,研究了锚杆抗拔的力学模型 ,计算出了模型中的力学参数和砂浆锚杆的长期抗拔力。另外 ,就锚杆拉拔损伤效应问题进行了讨论 ,引入了变形损伤效应和时间损伤效应的概念。结果表明 ,时间效应对于锚杆抗拔性能有较大的影响 ,在粉质粘土中砂浆锚杆的长期抗拔力比瞬时极限抗拔力下降 1 4～ 1 3。
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| 关 键 词： | 锚杆 蠕变 抗拔力 损伤 |
| 文章编号： | 1000-4548(2002)01-0061-03 |
| 修稿时间： | 2001年5月14日 |
Creep damage effects of pulling grouting anchor in soil |
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| XU Hongfa,LU Hongbiao,QIAN Qihu.Creep damage effects of pulling grouting anchor in soil[J].Chinese Journal of Geotechnical Engineering,2002,24(1):61-63. |
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| Authors: | XU Hongfa LU Hongbiao QIAN Qihu |
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| Affiliation: | 1.Engineering Institute PLA University of Science and Technology Nanjing 210007 China 2.Department of Earth Sciences Nanjing University Nanjing 210093 China |
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| Abstract: | On the basis of pulling creep test on grouting anchor in silty clay, a mechanical model of pulling anchor has been established, and the parameters of the model and the long term pulling strength of anchor were derived in this paper. The damage effect of pulling anchor was discussed, and the concepts of the deformation damage effect and the time damage effect were developed. The results have shown that there were great influences of the time effects on pulling properties of the anchor and the long term pulling strength on grouting anchor in silty clay is less about 1/4 to 1/3 than immediate limit pulling strength. |
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| Keywords: | anchor creep pulling strength damage |
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