Manufacturing method and creep shear test method of mud-containing interlayer rock joint sample

The invention provides a method for manufacturing a mud-containing interlayer rock joint sample and a creep shear test of the mud-containing interlayer rock joint sample, and aims to solve the problem of water loss and hardening of an interlayer under conventional conditions in a mud-containing interlayer creep shear test. The water content of the mud layer is kept stable in the long-term creep process; in the creep shear process of a mud-containing interlayer sample, the total height of the sample (calculating the thickness change of a mud interlayer) needs to be accurately measured, and if a large amount of mud interlayer is extruded due to too high normal loading, a design test needs to be modified; in addition, weighing is carried out again after the test to verify the water loss condition of the sample, and if the water loss rate is higher than a set index, the test also needs to be carried out again. The method ensures scientization and standardization of the creep shear test process of the mud-containi