CONSTRUCTION METHOD OF UNDERGROUND EARTH RETAINING WALL BY BORED HOLES EXCAVATED IN THE GROUND WITHIN LINE SEPARATED FROM BOUNDARY BY 500MM, AND VARIOUS WALLS LIKE JOINT WALL, CONNECTION WALL, BUTT-JOINT WALL, CONTINUOUSLINE WALL, SUPERPOSED WALL, CUT-OFF WALL BY USE THE METHOD

摘要

PURPOSE: To effectively and usefully utilize unused lands and undiscovered lands within the boundary, by boring excavated holes in the ground within the boundary and jointing constructed column-walls and connected column-walls to erect underground earth-retaining wall. ;CONSTITUTION: Bored holes 40, 40 are vertically excavated in turn in the ground within the line H separated from a boundary I by 500mm by use of a civil construction machine and by the intermittent work. And column-walls like soil cement column-walls A, B are erected by use of the bored holes 40. Next, connecting bored holes are vertically bored in turn in the unconstructed ground on the line H of boundary between the column-walls A, B by use of a civil construction machine and by the intermittent work. Next, a connecting column-wall is erected by use of the connecting bored holes to unify the connecting column- wall and the column-walls as a unit and construct an underground earth retaining wall. By the same working method, various kinds of earth retaining walls such as a continuous wall, a connection wall, a butt-joint wall, a continuous line wall, a superposed wall, a cut-off wall, are constructed.;COPYRIGHT: (C)1994,JPO