Portable type excavation shoring method and device

摘要

PURPOSE: To prevent traffic obstruction, and to open a road surface. ;CONSTITUTION: A recessed section is excavated in conformity with the size of a propelling machine 1 and the propelling machine 1 is installed at the starting point of the laying of a pipe, and a front section C is excavated and a earth-retention B is executed in a rear section. The front section C is propelled by a propulsive jack 18 while taking reaction in the earth-retention B, a lightweight steel sheet-pile 22 is applied to the sheathing B brought to an open state, and the pipe is laid and filled back and the steel sheet-pile 22 is extracted.;COPYRIGHT: (C)1996,JPO