INTRAPIPE EXCAVATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide intrapipe excavation equipment which increases the amount of excavated earth discharged per unit time so as to realize efficient and inexpensive work of intrapipe excavation. SOLUTION: The intrapipe excavation equipment comprises a water jet 1 which excavates earth 11b in a pipe 11a by using jet water, an underwater sand pump 2 which discharges outside the pipe 11a the muddy water containing the excavated earth in the pipe 11a excavated by the water jet 1, and a piping unit 3.