【摘要】 针对机械化全断面法隧道工程掌子面、进尺段及支护段稳定性控制难题，基于主动支护力学特征，展开对机械化全断面法施工隧道主动支护体系及设计模型的研究。基于隧道施工全过程围岩变形力学特征，参考隧道施工风险类型，构建以掌子面核心土支护-超前预支护-锚固层支护-喷层支护为主要支护构件的隧道主动支护体系；基于主动支护构件作用特点建立对应的掌子面超前支护力学模型(M1)、锚固层支护力学模型(M2)和喷层支护力学模型(M3)。根据隧道施工失稳风险区域的差异性，提出3种隧道主动控制模式(模式A、模式B和模式C),并建立了基于掌子面稳定性系数的隧道主动控制模式确定方法。最终，基于主动支护力学模型，建立各主动控制模式下隧道主动支护体系的设计模型。更多还原

【Abstract】 Based on the mechanical characteristics of active support, a study was conducted on the active support system and its design model for the construction of tunnels using the mechanized full section method to address the stability control challenges of the tunnel face, advance section, and support section. First, based on surrounding rock deformation mechanics throughout the tunnel construction, and tunnel construction risk assessment, an active tunnel support system was constructed with the core soil of the tunnel face-advance pre-support-anchor layer-shotcrete layer as the main support components. Corresponding mechanical models were established for advance support of tunnel face(M1), anchored layer support(M2), and shotcrete layer support(M3). Second, based on the differences in instability risk areas during tunnel construction, three active control modes for tunnels(mode A, mode B, and mode C) were proposed, along with the establishment of a method for determining the active control modes of tunnels based on thetunnel face stability coefficient. Finally, design models for active tunnel support systems under various active control modes were established. The research results provide theoretical guidance for optimizing support design and stability control in mechanized tunneling.更多还原