Due to the distinct difference in tensile and compressive properties,the position and deformation curvature of curved neutral layer will change with time for the!strata in a creep state.

• 由于岩石材料抗拉与抗压性能的明显差异,使岩层受蠕变作用时,其弯曲中性层位置及变形曲率都将随时间变化。