CAJ | 학술논문

针对穿越60°倾角活动正断层情况，隧道采取节段长度为0.5D(D为隧道洞径)、节段间柔性连接的隧道抗断措施；并对柔性连接隧道在正断层黏滑错动作用下的受力、变形特征进行模型试验研究。试验结果表明：在距离土体主破裂面1D 范围内，柔性连接隧道衬砌结构的纵向、环向应变变化较大。柔性连接隧道的主要破坏形式为节段间转动和错台，隧道节段连接处发生2处转角为33°和28°的转动破坏，破坏范围为2.5D。在相同条件下，与未采取抗断设计的完整隧道相比：柔性连接隧道衬砌结构纵向应变要小于完整隧道应变，其破坏范围也小于完整隧道的破坏范围。
침대천월60°경각활동정단층정황，수도채취절단장도위0.5D(D위수도동경)、절단간유성련접적수도항단조시；병대유성련접수도재정단층점활착동작용하적수력、변형특정진행모형시험연구。시험결과표명：재거리토체주파렬면1D 범위내，유성련접수도츤체결구적종향、배향응변변화교대。유성련접수도적주요파배형식위절단간전동화착태，수도절단련접처발생2처전각위33°화28°적전동파배，파배범위위2.5D。재상동조건하，여미채취항단설계적완정수도상비：유성련접수도츤체결구종향응변요소우완정수도응변，기파배범위야소우완정수도적파배범위。
Based on the project of the tunnel crossing the normal active fault whose dip angle is 60°,the length of segment is 0.5D(D is the diameter of tunnel) and flexible connection between two segments design is adopted in articulated tunnel. Through a model experiment,the deformation characteristics of tunnel with flexible joints are discussed. The experiment results show that the longitudinal strain and transverse strain of articulated tunnel change greatly in the range of 1D near the fracture plane. The tunnel failure mode is the combined rotation and slab staggering,the rotation angle is 33°and 28°,and the deformation range is 2.5D. Compared the tunnel where the anti-breaking measures are taken with the flexible tunnel,under the same experiment condition,the result indicats that the longitudinal strain of tunnel with flexible joints is smaller than the complete tunnel′s,and the deformation range of the flexible tunnel is smaller than that of the complete tunnel.