摘要
编制符合实际受力和变形情况的锚杆数值计算单元,利用拉格朗日差分计算方法建立节理岩体边坡的数值分析模型,分析锚杆在节理滑移和张开情况下的受力特征,以及与边坡岩体之间的相互耦合作用效果,结果表明:边坡在锚杆加固后,仍存在较大的变形,锚杆起到柔性加固作用;由于锚杆的加固作用,在节理面两侧岩土体的位移变化不大,锚杆对节理岩体起到了拉结作用,但这种拉结作用仅在滑体发生运动后才能产生;由于滑体的运动,导致与之相交的锚杆产生较大轴力,在与节理相交部位均存在锚杆轴力的峰值,从而锚杆呈现轴力多峰值的形态。
The numerical calculation element of the anchor bolt is built, which is in accordance with the real situation of bolt mechanical and deformation characteristic. The Lagrange differential calculation method is used to build the jointed rock mass slope calculation model, as well as the coupling effect of anchor bolt and slope. The analysis results show that：（1）after bolted, the slope still occur large deformation, and the anchor bolt shows flexible reinforcement effect; （2）Due to the reinforcement effect of bolt, the displacement of rock mass near the joint plane does not vary much. The anchor bolt exerts the tensile effect, although this effect only occurs if the slip block moves; （3）Due to the moving of the slip block, there exists large axial force in the anchor bolt, which is intersected with the joint plane. And there exist several peak value of axial force in the bolt.
出处
《建筑技术》
2013年第3期273-276,共4页
Architecture Technology
基金
江西省交通科技项目基金资助(2011C0057)
关键词
节理边坡
锚杆
空间效应
位移分布
jointed slope
anchor bolt
space effect
displacement distribution
