This monitor is equipped with double drum,bicable houble piece and double piece and quardruple corearmored cable and is put down into the hole through the orientation of a double-pulley-racl. Its basic principle is combining uttrasonic distance measuring theory with comprter and comprehensive scientific monitoring technology,to execute quality inspection of large diameter foundation pile hole ;that is to monitor hole diameter,inxlination and the thickness of downhole cuttings sediment.
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杨春明. CDJ—1型超声波大口径桩孔检测仪[J].钻探工程,1994,(1):10-12.Yang Chunming Institute of Exploration Techniques, MGMR. CDJ-1 Ultrasonic Monitor for Large Diameter Pile Hole[J]. Drilling Engineering, 1994,(1):10-12.