UNDERGROUND STRUCTURE, AND METHOD FOR RECONSTRUCTING BUILDING STRUCTURE HAVING UNDERGROUND SKELETON

摘要

PROBLEM TO BE SOLVED: To suppress the occurrence of bottom base floating and bottom base swelling of an existing underground skeleton and to reduce construction cost when a building structure having an underground skeleton is reconstructed.SOLUTION: An underground structure 10 during reconstruction of a building structure having an underground skeleton includes: an existing bottom base 22 and existing walls 24 remaining in an underground without being demolished; existing pillars 26 remaining in an underground without being demolished except a part of an upper side; newly constructed piles 32 installed downward from an existing bottom base 22; newly constructed inverted pillars 34 with bottom edges thereof buried in the newly constructed piles 32, respectively; and temporary angle braces 40 connecting the existing pillars 26 and the newly constructed inverted pillars 34 respectively to each other so that force can be transmitted therebetween.