THE STUDY ON THE CLEANING PROCESSING FOR UNDER GROUND LAID PIPELINE WITH LARGE DIAMETER USING HIGH PRESSURE WATERJET

摘要

It is presented in this paper the novel cleaning processing for defocusing on the interne wall of the pipeline (diameterΦ720mm) and blowing off the separated fouling matter to the mouth of the well (mouth distance 200m) using the high pressure water jet and elevating it ground upward. Field experiment results show, the above mentioned novel cleaning processing is possessed of certain significance for cleaning other pipelines like this.