JOINT CONSTRUCTION OF GREAT DEPTH CONTINUOUS UNDERGROUND WALL REINFORCED CAGE

摘要

PURPOSE: To promote execution efficiency by projecting steel framed joints connecting a reinforced cage in the longitudinal direction at short sides of a rectangular parallelepipedic frame, and inserting one steel plate on one side between two steel plates on the other side to joint them with a pin. ;CONSTITUTION: An upper side reinforced joint 4b is formed of two steel plates, and since a lower side reinforced joint 4a is held between them, shearing surfaces of a pin are separated in two places, strength thereof is promoted and, at the same time, stabilized joint is obtained without having idle in any forward, backward and sideways direction. Then, an amount of bar arrangement of an excavation section side in a reinforced cage 40 is more than that of the backward soil side, and because the center of gravity goes a little toward the excavation section side from the center line, the joints 44a and 44b are set by the center line to have eccentricity so that the reinforced cage 40 is vertically suspended. When main bars 42a and 42b of screw reinforcements are connected, a screw diameter around the end of a nut-like coupler is larger than the original diameter, and a root diameter of a thread is wider than the original size to make it easy to arrange reinforcemets. By the constitution, accuracy and stability can be promoted.;COPYRIGHT: (C)1996,JPO