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隧道锚杆支护是一种能够与围岩共同变形的柔性支护方法,其对围岩过度变形有良好的控制作用,然而现有隧道锚杆支护设计体系大多依据工程类比法,而工程类比法往往存在一定的偶然性,不适合直接应用于工程实践当中。为解决该类问题,本文通过运用理论计算和数值模拟技术建立隧道最大变形位移与锚杆设计参数的目标函数以及分析模型,然后将得到的目标函数和模型结合,形成迭代方程,运用迭代的思想求解出最优设计参数。实践证明此类分析、计算、建模、迭代的方法具有很好的经济、社会效益。
Tunnel bolt support is a kind of flexible support method that can be deformed together with surrounding rock. It has a good control effect on over-deformation of surrounding rock. However, most of the existing tunnel bolt support design systems are based on engineering analogy method, Analogy often there is some chance, not suitable for direct application in engineering practice. In order to solve this kind of problem, this paper establishes the objective function and the analysis model of the maximum deformation displacement and the bolt design parameters by using the theoretical calculation and the numerical simulation technology, and then combines the obtained objective function and the model to form an iterative equation. By using the iterative thinking Solve the optimal design parameters. Practice has proved that such analysis, calculation, modeling, iterative method has good economic and social benefits.