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本文作者把围岩应变法、孔洞位移法和衬砌内力法三种地下结构设计模型与圆形隧道的弹、塑、粘性三种衬砌计算理论结合起来,通过室内的模型试验和现场量测验证后,得到了地层压力与衬砌刚度以及地层本构关系有关的设计公式;得出了侧压力系数随衬砌与地层的刚度比而变化,且比静止侧压力系数大。将此法运用于新奥法或盾构法隧道设计中,即可减薄衬砌,节省投资。
The author combines the three underground structural design models of the surrounding rock strain method, hole displacement method, and lining internal force method with the elastic, plastic, and viscous lining calculation theories of circular tunnels, and verified by indoor model tests and on-site measurements. The design formulas related to the formation pressure, lining stiffness and the constitutive relation of the formation are obtained. It is concluded that the lateral pressure coefficient varies with the stiffness ratio of the lining to the formation and is larger than the static side pressure coefficient. Applying this method to the design of the new Austrian tunnel or shield tunnel can reduce the lining and save investment.