Applicability of hydraulically expansive-type steel pipes as a linear or planar lift-up system for correcting irregular subsidence of detached housing has been experimentally investigated using two types of scale model foundation, i.e. of single or double reinforcement.
The summary of this report is as follows:
1) These pipes successfully separate the model foundation from the ground about 20 - 30mm in height by hydraulically expanding of 25MPa.
2) Strains occurred inside the foundation with single reinforcement during lift-up by various patterns of pipe arrangement have been measured, and patterns to lift-up foundation without damage have been found.
