EARTH RETAINING CONSTRUCTION METHOD IN OPEN-CUTTING CIVIL ENGINEERING WORK

摘要

PURPOSE: To carry out earth retaining work rapidly and retain earth positively and continuously even over a long distance. CONSTITUTION: At the time of excavating an excavated ditch 1 from the ground, a resin tube 2 longer than the whole length of a pipe to be laid is folded and previously enclosed in a pressure container 3 installed at a start shaft, and the tip part of the resin tube 2 is folded back and fixed in the reversed state to the outlet of the pressure container 3. When the excavation of the excavated ditch 1 is started, a pressure fluid is fed into the pressure container 3, and the reversed face of the resin tube 2 is advanced following the progress of excavation. The supporting force of the side wall of the excavated ditch 1 is secured by the pressure of the pressure fluid in the resin tube 2 to maintain the shape of the ditch. Fluidized backfilling earth is supplied into the ditch at the upper part of the resin tube 2 for backfilling.