Twin-leaf precast arch structure with lower projecting lib of arch crown and construction method of the same

摘要

The present invention relates to a two-segment precast arch structure in which both lower ends are fixed to a foundation installed on the ground, and both upper ends are interconnected to form an arch structure, wherein both lower ends are fixed to the base. At least one of the main body and the upper end of the segment main body extending along the transverse direction to a thickness thinner than the segment main body and supporting each other, forming a space portion thereon, and a joint slab protruding downward from the joint slab to support each other It consists of including a protruding rib. According to the present invention as described above, since it is possible to provide a continuous rigid joint structure in the vertical and horizontal direction without using a separate support means, construction cost and construction period are significantly shortened, as well as providing an arch structure with greatly improved structural stability. You can do it.