System constructing underground structure by the pulling force of tension member and method constructing underground structure thereby

摘要

According to the present invention, two supporting points on a pilot tensile member, that is a pulling fixed point F, and a reaction supporting point S are a supporting point. The pulling reaction generated when a hydraulic jack pulls a pilot tensile member is delivered to a P side steel pipe through a supporting H-shaped steel of the hydraulic jack, and used to the pilot tensile member. Moreover, the pulling reaction of the used pilot tensile member is delivered to a reaction supporting point S. Therefore, both steel pipes P, Q are facing each other and dug toward the underground central part by interaction between the reaction of the supporting H-shaped steel and the pulling reaction of the hydraulic jack. The pulling method does not need a separate reaction supporting wall, so a structure is simple and the digging work is efficient. Therefore, the construction period can be reduced. Both steel pipes P, Q are facing each other and dug at the same time toward the underground central part, so the contact side friction length of a digging steel pipe is cut by half and the progressive frictional force is minimized. Therefore, steel pipe digging is efficient. The digging steel pipe is certainly guided toward a planning direction by the pilot tensile member, so the steel pipe digging direction corresponds to the planning direction not only in a digging process but also after the steel pipe digging is finished. Therefore, the construction quality is excellent and the quality can be expected.