CURVE PROPELLING METHOD FOR SMALL CALIBER PIPE

摘要

PROBLEM TO BE SOLVED: To make it possible to laid a long distance curve of a buried pipe while correcting a locus by subsequently jointing a knee bending control connection pipe and a knee bending connection pipe to a propelling machine, traveling a traveling instrument in both connection pipes with joint, and measuring a propelling locus. SOLUTION: Knee bending control connection pipe 3a and knee bending connection pipe 3b are jointed to a propelling machine 1 equipped with an excavation cutter 2. Both connection pipes 3a and 3b are hinged with a pin in a bendable manner. They are jointed to both opening ends with bolt and nut, and a traveling way 6 is constructed. Jacks 7 having a wire type expansion length measuring device to a knee bending site are used for the knee bending control connection pipe 3a to control elongation together with an outside controller. A traveling instrument 8 mounting a bearing angle detector and a moving distance detector such as rotary encoder, etc., thereon is traveled on the traveling way 6 to measure a traveling distance and direction, and a curve is made while correcting a locus by expansion controlling the jacks 7.