| 预应力锚索锚固效应数值模拟分析 |
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| 引用本文： | 郁浩,侯圣权,李忠宝. 预应力锚索锚固效应数值模拟分析[J]. 徐州建筑职业技术学院学报, 2010, 10(4): 31-34 |
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| 作者姓名： | 郁浩 侯圣权 李忠宝 |
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| 作者单位： | [1]徐州市交通规划设计研究院,江苏徐州221000 [2]安徽省煤炭科学研究院,安徽合肥230001 [3]江苏省地质矿产局第五地质大队,江苏徐州221004 |
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| 摘 要： | 采用FLAC3D对预应力锚索在岩体中形成的附加应力场分布特征进行了数值模拟.研究结果表明：在一定预应力条件下,单根锚索在岩体中形成了类似＂8＂字型的附加应力场,锚固段剪应力分布曲线大致呈负指数形式递减,而随着预紧力量级的增加,剪应力向纵深方向转移;群锚形成的压应力区相互叠加,连成一体,形成＂碗型＂压缩加固带,锚索预应力及主动支护作用几乎扩散到整个自由段.
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| 关 键 词： | 锚索加固 预应力 应力场 数值模拟 |
Numerical Simulation Analysis on Anchorage Effects of Prestressed Cable Bolts |
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| YU Hao,HOU Sheng-quan,LI Zhong-bao. Numerical Simulation Analysis on Anchorage Effects of Prestressed Cable Bolts[J]. Journal of XUZHOU Institute of Architectural Technology, 2010, 10(4): 31-34 |
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| Authors: | YU Hao HOU Sheng-quan LI Zhong-bao |
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| Affiliation: | 1.Xuzhou Communications Planning and Design Institute,Xuzhou,Jiangu 221000,China;2.Anhui Coal Research Institute,Hefei,Anhui 230001,China;3.5th Geological ExplorationTeam,Jiangsu Bureau of Geology and Mineral Resources,Xuzhou,Jiangsu 221004,China) |
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| Abstract: | Based on FLAC3D,this paper carried out numerical simulations on the distribution characteristics of additional stress field by prestressed cable bolts in rock mass.The results revealed that a single anchorage cable formed a 8-shape additional stress field in rock mass under conditions of certain initial stress.The shearning stess distribution curve of anchorage segment decreased generally in the negative-exponential form,and the shearing stress transferred in depth with the increase of pretightening magnitude.The compressive stress zones by anchor group superposed and united to form a bowl-shape compression reinforcement zone,and the anchor pretension and active supporting almost spread over the entire free field. |
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| Keywords: | anchorage reinforcement prestress stress field numerical simulation |
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