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采用Ｒ．Ｇｏｏｄｍａｎ单元模拟防水层，对复合式隧道衬砌防水层的变形和力学特性进行了数值分析。发现防水层在传递层间力的同时，还传递剪应力，使复合衬砌结构表现出介于叠合梁和单体梁之间的力学特性。
Using R. Goodman unit simulation waterproof layer, the composite tunnel lining waterproof layer deformation and mechanical properties of a numerical analysis. It is found that the waterproof layer transmits the interlaminar force and also transmits the shear stress so that the composite lining structure exhibits the mechanical properties between the composite beam and the single beam.