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文章以土与基础的相互作用理论为基础,建立了基于双参数模型的管棚支护结构与围岩相互作用模型,推导了管棚结构的挠度方程、转角方程、弯矩方程及地基反力方程,分析了工况转换过程中,管棚支护体系的受力特性。并通过实例计算,得出了某隧道在管棚支护下的挠度曲线、地基反力,同时将管棚结构扰度计算结果与实际测试进行了比较,结果吻合较好。
Based on the theory of interaction between soil and foundation, the paper establishes a model of interaction between pipe and roof retaining structure and surrounding rock based on two-parameter model, and derives the deflection equation, rotational angle equation, bending moment equation and foundation reaction force Equation, and analyzes the stress characteristics of pipe shed support system during the transition of working conditions. Through the calculation of example, the deflection curve and the foundation reaction force of a tunnel under the pipe shed support are obtained, and the calculation results of the pipe shed structure perturbation are compared with the actual test. The result is in good agreement.