| 全长粘结式锚杆加固节理边坡的动静态位移响应 |
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| 引用本文： | 林杭,曹平,李江腾,何忠明.全长粘结式锚杆加固节理边坡的动静态位移响应[J].岩土力学,2009,30(6):1787-1792. |
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| 作者姓名： | 林杭 曹平 李江腾 何忠明 |
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| 作者单位： | 1. 中南大学 资源与安全工程学院，长沙 410083；2. 科罗拉多矿业大学 土木工程系，科罗拉多 80401 |
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| 基金项目： | 高等学校博士学科点专项科研基金，中国博士后科学基金，中南大学博士后科学基金，湖南省研究生创新基金 |
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| 摘 要： | 锚杆通常被作为表面粗糙的轴力杆单元进行分析，但在节理边坡加固中，由于节理面的错动，同时考虑锚杆的轴向和横向作用显得更加合理。通过理论分析，建立锚杆三弹簧单元的力学特征模型和变形特征模型，对其受力和变形进行全面分析；运用拉格朗日元数值方法(FLAC3D)，建立以理想弹塑性本构Mohr-Coulomb准则为基础的节理边坡模型，应用三弹簧锚杆单元，对其锚固前后的动静态位移响应进行模拟。结果表明：节理面锚固处理后，岩体的刚度得到提高；边坡各部位的位移减小，节理两侧位移的突变值变小；锚杆对节理的上下盘岩体起到有效的拉结作用，抑制了两盘之间的较大变形位移，有利于边坡稳定。
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| 关 键 词： | 锚杆 节理边坡 力学特征 变形特征 横向作用 动静态位移 FLAC3D |
| 收稿时间： | 2007-07-06 |
Response of dynamic and static displacements of jointed slope reinforced by wholly grouted bolts |
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| LIN Hang,CAO Ping,LI Jiang-teng,HE Zhong-ming.Response of dynamic and static displacements of jointed slope reinforced by wholly grouted bolts[J].Rock and Soil Mechanics,2009,30(6):1787-1792. |
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| Authors: | LIN Hang CAO Ping LI Jiang-teng HE Zhong-ming |
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| Institution: | 1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China; 2. Department of Civil Engineering, Colorado School of Mines, Colorado 80401, USA |
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| Abstract: | Bolt is often analyzed as spar element with rough surface, which can only endure stress along the axial direction. But when it applied to jointed slope, it is more reasonable to consider both the axial and lateral effect of bolt due to the moving of joint plane. The models of mechanical characteristics with three springs and deformation characteristics are founded for bolt according to the theoretical analysis. In these models, the stress and deformation of bolt can be fully analyzed; in order to reflect the differences of dynamic and static displacements effect of jointed mass between the states of bolting and unbolting, the numerical calculation models of slopes are founded based on the perfect elastoplastic constitutive model, Mohr-Coulomb criterion, by numerical simulation technique of fast Lagrangian analysis of continua in 3D (FLAC3D). In the numerical simulations, the bolt element with three springs is applied. The analysis result shows that after bolting in jointed plane, the stiffness of rock mass is improved; the displacement of slope becomes smaller; the mutation magnitude of displacement beside joint plane becomes smaller; bolt system exerts the tensile effect for the upper and lower rock mass, and reduces the displacement in the joint plane, which is good to the slope stability. |
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| Keywords: | FLAC3D |
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