基岩断层错动引起上覆土体变形，互层胶结土体中断层破裂机制认识不足，隐伏裂缝影响规律掌握不明确。基于4个离心机试验，针对黏土与砂土构成的9层互层土，对比土体胶结特性和隐伏裂缝上断点埋深影响。试验结果表明，正断层错动影响下，互层非胶结土体受剪切作用发生变形破坏，在断层上方形成一倒梯形分布的不均匀沉降区，并形成集中剪切带。当不均匀沉降传至地表时，顶层非饱和黏土层形成地表张拉破裂。而互层胶结土则观测到受弯变形破坏，从而产生剪切破裂和张拉破裂。其中，地表张拉破裂的深度远大于互层非胶结土体的观测结果。互层胶结土中，随着隐伏裂缝上断点埋深的增加，由上断点扩展形成破裂的倾角随之增加，地表破裂向上盘一侧偏移。

It is known that bedrock fault movement can cause the deformation of overlying soil during an earthquake. However, the mechanisms of fault propagation in layered cemented soil and the influences of pre-existing fracture on soil have not yet been fully understood. In this study, four centrifuge tests were conducted on 9-layered soil of clay and sand to investigate the effects of cementation and tip depth of pre-existing fracture. Centrifuge testing results show that the layered uncemented soil was subjected to deform by the shear force after normal faulting. Then, an upside down trapezoidal distribution of uneven settlement area was formed, and a shearing localization zone was also developed above the bedrock fault. When the uneven settlement finally reached the ground surface, tensile ruptures were formed at the top of the unsaturated clay layer. The bending deformation found in the layered cemented soil induced the shearing and tensile ruptures. The depth of surface fault ruptures in cemented soil was greater than that observed in the uncemented soil. In layered cemented soil, with increasing the tip depth of pre-existing fracture, the dip angle of the rupture initiating from the tip of the pre-existing fracture increased, and the surface fault rupture moved towards the hanging wall.