CONSTRUCTION OF A RETAINING WALL FOR THREE SEQUENCE BOXTUNNEL USING BOX-TYPE-EXCAVATING-MACHINE

Abstract

Box-type-excavating-machine has been developed for structuring of big space in congested underground. This construction-site has a big shield sewer pipe with a diameter of 6, 600 mm above a new planning railroad tunnel. Using this box-type-machine, underpath structure had to be constructed with limitlessly looseness underground and structures of established life infrastructure.
A new box tunnel is 18m wide 10m high and 15m long. 68 pieces of 85cm and 87cm iron square box were installed by pipe-jacking method to construct retaining wall.