TRANSPORTING METHOD AND DEVICE FOR EXCAVATED SOIL

PROBLEM TO BE SOLVED: To transport excavated soil at a high speed in a long distance by communicating the periphery of a suction inlet with the air and arranging an air pipe near the suction inlet to supply a compressed air in the transporting direction of a soil discharge pipe and jetting the air to excavated soil fed in the suction inlet. SOLUTION: Natural ground at a cutting face is excavated and excavated soil 25 is led to the rear end of an auger tube 10 and dropped from a guide pipe 24 into a soil discharge acceleration pipe 17. When an air compressor is driven, compressed air is conducted to the soil discharge acceleration pipe 17 through an air supply pipe 27 and jetted out from a front end nozzle 26 to a soil discharge pipe 18. Excavated soil 25 and air are sucked through an air intake or the soil discharge pipe us and conveyed to the starting side. The compressed air is fed to the upstream of the soil discharge pipe 18 while sucking the peripheral air to increase the suction air volume in the soil discharge pipe 18. In this way, the mixing ratio of the excavated soil 25 is decreased and a large quantity of excavated soil 25 can be transported at a high speed in a long distance through the soil discharge pipe 18.