对砂岩在自然状态、烘干状态、半饱和状态和饱和状态等不同水饱和状态时循环载荷作用下的变形特征进行了实验研究。测试结果发现:①随着含水量的增加,砂岩的变形有增大的趋势,而其强度将有所下降低;②其塑性滞回环的斜率也越来越小,即在相同的应力变化幅度内,其轴向应变增量有逐渐增大的趋势;横向应变和体应变也呈现越来越大的规律。 The deformation characteristics of sandstone under cyclic loading under different water saturation conditions, such as natural state, dry state, semi-saturated state and saturated state, were studied experimentally. The test results show that: ①With the increase of water content, the deformation of sandstone tends to increase, while its strength will decrease slightly. ② The slope of plastic hysteresis loop is also getting smaller and smaller, , The axial strain increment tends to increase gradually. The transverse strain and the body strain also show an increasing law.