| 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.[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 University of South China(Science and Technology),2008,22(4):68~72.] |
| 岩土体对锚索预应力的响应特性 |
| Response Characteristics of Rocks Mass and Soil to Prestressed Anchorage Cables |
| 投稿时间：2008-10-23 |
| DOI： |
| 中文关键词: 岩土力学 预应力锚索 岩土体 似椭球体压缩区 无应力锥 |
| 英文关键词:rock-soil mechanics prestressed anchorage cable rock-soil mass approximately ellipsoidal zone non-stressed zone |
| 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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| 中文摘要: |
| 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. |
| 英文摘要: |
| 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 contour appears as “U” shape.The stress and displacement of rocks under pier decrease hyperbolic to 0 with increasing degree of depth.Between two piers,non-stressed zone is formed on surface.Tendon spacing was determinated based on the thickness of prestressed-wall.The non-stressed and weaken-stressed zones between anchorage cables were reinforced by cable bolt. |
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