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| 预应力锚索荷载传递与锚固效应计算 | |
| 引用本文： | 邓宗伟,冷伍明,邹金锋,唐葭.预应力锚索荷载传递与锚固效应计算[J].中南大学学报(自然科学版),2011,42(2). |
| 作者姓名： | 邓宗伟 冷伍明 邹金锋 唐葭 |
| 作者单位： | 1. 中南大学资源与安全工程学院湖南长沙,410083;湖南城市学院土木工程学院,湖南益阳,413000 2. 中南大学土木建筑学院湖南长沙,410075 3. 湖南城市学院土木工程学院,湖南益阳,413000 |
| 基金项目： | 湖南省教育厅重点研究项目，湖南省交通建设基金资助项目，中南大学博士后科研基金资助项目，湖南城市学院青年基金资助项目 |
| 摘 要： | 考虑岩体的损伤特性,根据剪切位移法,推导锚固段侧摩阻力沿锚固长度的非线性分布计算公式;结合该公式和Mindlin解,推导出锚固岩体影响范围内任一点的应力分布解析解,并以具体例子进行计算分析.研究结果表明:锚索在锚固段的应力分布主要集中在前端1/3处,比传统方法计算的结果更集中;为提高锚固的效果不能一味增加锚固段长度,而应增加有效的锚固面积或分散前端的集中应力;锚索的设计参数中,相邻锚索之间相互影响的最小距离应以正应力为标准进行控制,而锚固力则应以剪应力为标准进行控制;随着锚索拉力的增加,在锚固段应力影响范围增加较小,但应力集中程度增加较大,因此,锚索设计时不但要考虑锚索与锚固体的黏结强度,更要考虑锚固体与岩土体的黏结强度. |
| 关 键 词： | 预应力锚索 非线性分布 Mindlin解 荷载传递 锚固效应 |
Calculation of pre-stress cable transference of load and effect of anchor |
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| DENG Zong-wei,LENG Wu-ming,ZOU Jin-feng,TANG Jia.Calculation of pre-stress cable transference of load and effect of anchor[J].Journal of Central South University:Science and Technology,2011,42(2). | |
| Authors: | DENG Zong-wei LENG Wu-ming ZOU Jin-feng TANG Jia |
| Institution: | DENG Zong-wei1,2,LENG Wu-ming3,ZOU Jin-feng3,TANG Jia2 (1.School of Resources and Safety Engineering,Central South University,Changsha 410083,China,2.School of Civil and Engineering,Hunan City University,Yiyang 413000,3.School of Civil Engineering and Architecture,Changsha 410075,China) |
| Abstract: | Based on shear displacement method,considering the damage characteristic of rock mass,the nonlinear distribution calculation formula of lateral friction along the anchorage length was deduced.Combining this formula with Mindlin solution,the analytic solution of stress distribution in anchoring rock mass was deduced.Taking advantage of this analytical solution,the specific examples were calculated and analyzed.The results show that the anchor section's stress distribution mainly concentrates in the front end... |
| Keywords: | pre-stress cable nonlinear distribution Mindlin solution transference of load effect of anchor |
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