为探明矿山法隧道喷膜防水衬砌结构的双面黏结型层间界面力学特性，采用试验测试和理论分析的方法进行分析和讨论。首先，总结喷膜防水衬砌结构和层间界面形式，结合隧道衬砌结构受力特点将其划分为DSL（double shell linings）、CSL（composite shell linings）和SSL（single shell linings）3种。然后，针对CSL中的双面黏结型层间界面进行剪切试验，从剪切-位移曲线结果可知其破坏分为黏聚-损伤及摩擦2个主要阶段，隧道衬砌的协同受力程度主要取决于防水层与基面的黏结强度。基于接触面的本构原理和剪切试验结果，进一步探讨双面黏结型层间界面的力学特性，发现其剪切力学特性和破坏准则可用摩尔-库仑本构模型进行表征，并可用接触面抗剪强度的剪胀公式考虑基面粗糙度的影响。研究结果探明了双面黏结型隧道衬砌结构的层间界面剪切破坏机制和力学特性，并得到了基于摩尔-库仑本构模型的相关参数，可以作为判断双面黏结型隧道喷膜防水衬砌接触面破坏的依据。
To investigate the mechanical characteristics of the
doublesided adhesive interlayer interface of the sprayapplied membrane waterproof lining structure of tunnels constructed
by mining method, a test and theoretical analysis are conducted. First, the
structure of sprayapplied waterproof membrane lining
and the form of interlayer interface are summarized, and the tunnel lining
structure is divided into three types, namely, doubleshell
linings, compositeshell linings, and singleshell linings. Second, a shear test is performed for the doublesided adhesive interlayer interface in the compositeshell lining structure. The sheardisplacement
curves show that the failure of the interface can be divided into two stages:
cohesiondamage and friction. In addition, the degree
of cooperative stress of the tunnel lining mainly depends on the bonding
strength of the waterproof layer and base surface. Finally, based on the
constitutive principle of the contact surface and shear test results, the
mechanical properties of the doublesided adhesive
interlayer interface are further discussed. The results show that the shear
mechanical properties and failure criteria can be characterized by the MohrCoulomb constitutive model, and the influence of the base surface
roughness can be considered by the shear expansion formula of the shear
strength of the contact surface. The research results revealed the shear
failure mechanism and mechanical characteristics of the interlayer interface of
the doublesided adhesive tunnel lining structure, and
relevant parameters are obtained based on the MohrCoulomb
constitutive model, which can serve as a basis for determining the failure of
the contact surface of the doublesided adhesive sprayapplied membrane waterproof lining.
