Cutter suction dredger is one of the most widely used dredger types in Waterway Dredging Engineering, with the advantages of strong adaptability to complex environment and high efficiency. Based on DEM (discrete element method), this paper studies the cutting efficiency of rock cutter teeth and the cutterhead systematically. The cutting experiments of single cutter are simulated, and the change characteristics of cutting force and cutting power under different cutting parameters and the failure mode of rock specimen are compared. The results show that the average cutting force is approximately proportional to the peak cutting force, which is about 1.2~1.6 times of the average cutting force during the cutting process. The pick cutterhead has the advantage of stable power, but the cutting output is relatively low.
In recent years, with the continuous development of China's economy, water transportation, as one of the main modes of transportation, has played an extremely important role. In order to ensure the efficiency and safety of water transportation, channel dredging is necessary. With the increase of transportation demand and the development of shipbuilding technology, the requirements for channel water depth are also increasing. Cutter suction dredger is widely used in dredging engineering because of its wide application range, continuous construction, excavation, transportation and reclamation.
Cutter suction dredger is one of the most widely used dredger types in Waterway Dredging Engineering, with the advantages of strong adaptability to complex environment and high efficiency. The cutter is the core equipment of cutter suction dredger, and the cutter teeth on the cutter are the part directly contacting with soil or rock. In the dredging project, the cutting tool (cutterhead) installed at the front end of the bridge is placed in the working area by the cutter frame, and the underwater soil is stirred and loosened by the rotary cutting of the cutterhead. The soil loosened by the cutter is mixed with water to form mud. Under the action of atmospheric pressure, the mud is pressed into the mud suction pipe at the back of the cutter, Then, the mud water mixture is pumped out by the mud pump and transported to the reclamation area (or the designated sludge unloading area) to complete the dredging operation.
