| 岩土体对锚索预应力的响应特性 |
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| 引用本文： | 冯金健,胡毅夫,张爱民,景觅.岩土体对锚索预应力的响应特性[J].南华大学学报(自然科学版),2008,22(4):68-72. |
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| 作者姓名： | 冯金健 胡毅夫 张爱民 景觅 |
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| 作者单位： | 中南大学,资源与安全工程学院,湖南,长沙,410083 |
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| 基金项目： | 湖南省交通厅科技资助项目(200541); 常张高速公路建设开发有限公司科研基金资助项目(200301) |
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| 摘 要： | 基于空间半无限体理论,对外锚头预应力线荷载在岩土体中的传递规律进行了研究.给出了锚墩下岩土体内任意点的应力及位移分布形式及相应的表达式.通过数值模拟,得到与理论计算一致的结果,结果表明：锚墩下岩土体形成一个近似椭球状的压缩区,位移等值线呈U型.锚墩下岩土体的应力和位移均呈双曲线形式分布,锚墩之间部分岩土体在一定深度内形成无应力锥区.据此提出锚索间距的＂预应力墙厚度＂设计法,锚墩间无应力区锚杆补强方法.
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| 关 键 词： | 岩土力学 预应力锚索 岩土体 似椭球体压缩区 无应力锥 |
| 收稿时间： | 2008/10/23 0:00:00 |
Response Characteristics of Rocks Mass and Soil to Prestressed Anchorage Cables |
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| FENG Jin-jian,HU Yi-fu,ZHANG Ai-min,JING Mi.Response Characteristics of Rocks Mass and Soil to Prestressed Anchorage Cables[J].Journal of Nanhua University:Science and Technology,2008,22(4):68-72. |
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| Authors: | FENG Jin-jian HU Yi-fu ZHANG Ai-min JING Mi |
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| Institution: | School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410083,China |
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| Abstract: | Study on mechanical characteristics of rocks under prestressed anchorage cables pier based on the half-space theory of the elasticity.The distribution law of stress and displacement of rocks under anchored pier were obtained,and its expression was given.The results obtained by numerical simulation are consistent well with theoretical calculation.The results show that a compressive zone which approximately ellipsoidal is formed on the surface of rockmass during the tensile process.And the displacement contou... |
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| Keywords: | rock-soil mechanics prestressed anchorage cable rock-soil mass approximately ellipsoidal zone non-stressed zone |
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