How is the working mud out of the bored pile? This is a difficult problem of drilling pile construction. The traditional drilling and grouting pile slurry treatment program is: in the process of drilling the use of sieve, mud in the small gravel, sand and other solid particles for separation, piling mud discharged to a sink, two sink to three sink Pool, full precipitation. During the construction process, the use of excavators in a timely manner to clean up a sink, two sink pool, three sink pool, clean up the sinking into the evaporation tank, until the natural dehydration curing, transported to the storage yard or dregs. This kind of mud treatment, for a small pile of barely feasible. If the number of piles for a large number of huge mud, this mud treatment is not applicable.