基于突变理论的单根土钉抗拔极限承载力计算

摘要

土钉抗拔极限承载力的计算是土钉结构设计的关键。以往的土钉抗拔力的计算往往只通过力学平衡分析法进行计算，但是土钉的作用机理是相当复杂的，单纯具体的力学分析很难满足设计所需的计算公式。通过建立势能函数方程，运用突变理论原理，避开具体的力学分析，计算解析得出土钉抗拔极限承载力的计算公式。运用该公式可以更好的实现安全节能的设计理念。%Calculating the ultimate bearing capacity of soil nail pullout is the key design of soil nailing structures .Calcu-lation of soil nail pullout resistance was often carried out by mechanical equilibrium analysis method in the past .Howev-er ,the mechanism of soil nailing is quite complicated ,the analysis alone is not enough to achieve a specific formula that meet the designing need .Here ,through the establishment of the potential energy function equation ,using the principle of catastrophe theory ,avoiding specific mechanical analysis ,the formula of calculating the ultimate bearing capacity of nail pullout resistance was unearthed .This formula is more practical for the design purpose of energy conservation .