Long Auger, Hydraulic Auto Drilling System

Recent year, the continuous flight auger for CFG piles are now widely used inthe construction field and becomes one of the most potential pile machine in china,because of its highly efficiency, strong adaptability and environmental protection. Butthe design theory for the drilling system of the continuous flight auger is not veryperfect. The driving unit driven by electromotor has bad performance of start, anddifficult to increase power. The drilling-in by hand has lower efficient and badconstruction quality. All these got in the way of the development of the auger.To resolve the problems mentioned above. This paper built the more perfect soilmechanics model for the drilling with continuous flight auger standing on theshoulder of the forerunner. Through analyzed the model in the drilling-in process theformulas for the reasonable rotate speed and the power is out. After it this paperdesigned the driven unit driven by the hydraulic motor and it's hydraulic systemwhich is the part of the full-hydraulic drilling system. Next this paper researched anddesigned the automatic control system for drilling-in which is the other part of thedrilling system. The control actuator are a hydraulic winch system controlled by adescribing valve in which the high-speed ON/OFF valves act as guiding valves. Thehydraulic system are designed and the mathematical model of the system are built.Further more the key parameter are decided after analysis and simulation. At last thispaper decided the principle for the control system and built the fuzzy controllersimulation model in the MATLAB. Some analysis and simulations were done to findthe excellent parameters for the fuzzy controller. Then the reasonable character of theController was fixed on.It is the first time to give out the theory supporter for CFG piling machine. Thenthis paper did some researching in the field of full-hydraulic automatic drilling systemachieve some results in the researching. It laid the groundwork for future research anddevelopment take by the latecomer.