REBUILDING METHOD FOR EXISTING BUILDING

PROBLEM TO BE SOLVED: To provide a rebuilding method that alleviates the influence of buoyancy applied to an underground skeleton in association with fluctuations in vertical load during construction work.SOLUTION: In a rebuilding method for an existing building, a metallic weight is installed in an underground skeleton to control the float-up and settlement of the underground skeleton. The metallic weight regulates the weight of a ground skeleton changing in a demolition step of an existing ground skelton in rebuilding work for an existing building and a construction step of a newly-built ground skeleton, and buoyancy of groundwater acting on the underground skeleton.SELECTED DRAWING: Figure 1 【課題】工事中の鉛直荷重の変動に伴い地下躯体に印加する浮力の影響を低減する建て替え工法を開発すること。【解決手段】既存建物の建て替え工事における既存の地上躯体の解体工程及び新築の地上躯体の構築工程において変化する地上躯体の重量と、地下躯体に作用する地下水の浮力とを調整する金属製錘を地下躯体に設置して、地下躯体の浮き上がりや沈下を制御する既存建物の建て替え工法。【選択図】図１