Stretching addition construction method null of subway

摘要

PURPOSE:To cut and remove reinforcing bars without requiring any work from a track side and to make easily additional extension work of platform in such a state that a yard wall including inside reinforcement in a subway yard is cut at very fast speed accurately and safely with high work efficiency and that the outside environment is not greatly influenced by vibration, noises, dust and others. CONSTITUTION:A passage space is bored in the outside of a yard wall 1 constructed along a subway track, and an external wall is newly constructed in the outside of the passage space. Guide pulleys 11P-U of a cable drive device A are installed in the formed passage space, and a body of the cable drive device is installed on the existing platform or the ground. After that, a cutting cable of a wire having ultra hard beads at a proper pitch is wrapped on a planned part to be cut in the yard wall, and the yard wall is cut and demolished by a cutting cable drive device. A removal device to remove the cut and demolished yard wall is installed in a passage pace of the inside of a new external wall, and a new platform is extended.