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基于能量原理,对拉力型锚杆锚固体的轴力与位移进行了计算分析。首先,对拉力型锚杆的承载机理以及所使用锚固单元和侧阻力计算模型做了简单介绍;其次,推导了锚固体单元的能量平衡方程,并给出其差分形式;然后,给出了拉力型锚杆锚固体工作性状的程序计算方法,并通过误差分析给出了程序收敛策略,提高程序计算效率;最后通过算例计算对拉力型锚杆锚固体承载性状进行了分析。研究表明:基于能量原理推导的拉力型锚杆锚固体能量差分方程及其程序计算方法可以合理地分析锚固体的工作性状,其计算结果可以为工程设计提供参考;拉力型锚杆锚固段的确定宜考虑锚孔直径以确定最经济的锚固长度。
Based on the energy principle, the axial force and displacement of the tensioned anchor are calculated and analyzed. Firstly, the bearing mechanism of the anchor bolt and the calculation model of the anchor unit and the side resistance are introduced briefly. Secondly, the energy balance equation of the anchor unit is deduced and the difference form is given. Then, the tensile force The method of program calculation for the working behavior of the anchor-type anchor is given, and the procedure convergence strategy is given by error analysis to improve the calculation efficiency of the program. Finally, the bearing behavior of the anchor-type anchor is analyzed by an example. The research shows that the energy difference equation of tension type anchor and its program calculation method can reasonably analyze the working properties of the anchor based on the energy principle. The calculation results can provide references for engineering design. The determination of anchorage section of tension type anchor Anchor diameter should be considered to determine the most economical anchor length.