EXCAVATION HEADER FOR PROPULSION OF SMALL STEEL PIPE AND CONSTRUCTION METHOD OF SAME

摘要

The present invention provides an excavation header for propulsion of a small steel pipe, and a construction method of the same. The excavation header strikes the ground or a bedrock layer while rotating a hammer unit after a clamping unit is fixated onto a propulsion casing, and independently controls first, second, and third hammers.;COPYRIGHT KIPO 2017