Experimental study on mud rapid dewatering based on vibration-negative pressure drainage method

In order to explore an economical, effective and rapid dewatering method for high water content mud, the feasibility of combining vibration and negative pressure to accelerate mud dewatering was discussed, and an indoor simulation test was designed.During the test, the drainage volume was monitored over time, and the soil content in the drainage was measured.The effect of vibration-negative pressure drainage method on the treatment of engineering mud was studied by applying different frequency vibration force, changing vibration range and using geotextile filter layer with different mass per unit area.The test results showed that compared with gravity drainage, negative pressure drainage can generate vacuum and increase the drainage rate, and accelerate the drainage process.Applying vibration force to negative pressure drainage can disturb the mud, accelerate the discharge of free water, alleviate the clogging of geotextiles, and increase the drainage rate.Expanding the vibration range and increasing the vibration frequency can improve the drainage rate of the mud treated by the vibration-negative pressure method, but too high vibration frequency will cause the failure of the geotextile filter layer and the loss of soil particles.When using the vibration-negative pressure drainage method to treat the mud, lower frequency vibration and thicker geotextile should be used to ensure the effectiveness of the geotextile filter.