STEEL PIPE FOR REINFORCING NATURAL GROUND, AND MANUFACTURING METHOD OF THE STEEL PIPE FOR REINFORCING NATURAL GROUND

摘要

PROBLEM TO BE SOLVED: To provide a steel pipe for reinforcing natural ground, which prevents water from leaking outside of the pipe unnecessarily during excavation and is easily cut or divided after cutting.;SOLUTION: This steel pipe 10 for reinforcing natural ground includes a plurality of annular grooves 12-1 to 12-4 formed at the predetermined interval therebetween in the longitudinal direction on its outer peripheral part, a cut face contact part 20 with which cut faces in the longitudinal direction come into contact at least over the whole part in the longitudinal direction in each of a plurality of divisions 17-1 to 17-3 partitioned by the annular grooved and positions in the peripheral direction are formed to be shifted from each other in adjacent front and rear divisions, and a plurality of slits 21 functioning as discharge holes each formed in each of the plurality of divisions 17-1 to 17-3.;COPYRIGHT: (C)2011,JPO&INPIT