▎ 摘　　要

NOVELTY - A soft ground reinforcement and subsidence structure restoration composition comprises a liquid (A) comprising a polyol, a foaming agent, a catalyst and a surfactant, and a liquid (B) comprising isocyanate. USE - Composition used for soft ground reinforcement method and subsidence structure restoration method (all claimed). Uses included but are not limited to road, tunnel, bridge, railway, harbors, airport lighting, factory, commercial building, and housing. ADVANTAGE - The semi-permanent and economical composition reinforces the soft ground and restores the settlement structure, possibly works in a narrow space (pit, basement, store, etc.), minimizes the impact on environmental pollution such as ozone layer destruction or global warming by using materials that do not interfere with life and operation during construction and do not pollute the environment, improves the safety of the working environment, has large vibration reduction effect is large, no contraction, expansion, or deterioration, and a little effect of temperature, and ensures precision restoration in mm unit. The composition is injected for soft ground reinforcement and subsidence restoration even in geology with low permeability coefficient (up to 10-6). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: oft ground reinforcement method, which involves drilling a hole in the ground, reinforcing (110) the reference surface by injecting a soft ground reinforcement and subsidence structure restoration composition into the reference surface through the drilled hole, reinforcing the upper ground by injecting the soft ground reinforcement and subsidence structure restoration composition into the upper ground based on the reference plane through the drilled hole, and improving (120) the lower ground by injecting the soft ground reinforcement and subsidence structure restoration composition into the lower ground based on the reference plane through the drilled hole; and ubsidence structure restoration method, which involves drilling a hole in the ground, reinforcing (110) the reference surface by injecting the soft ground reinforcement and subsidence restoration composition through the drilled hole, improving (120) the lower ground by injecting the soft ground reinforcement and subsidence structure restoration composition into the lower ground based on the reference plane through the drilled hole, and restoring (130) the upper ground by injecting the soft ground reinforcement and subsidence structure restoration composition into the upper ground with respect to the reference plane through the drilled hole. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating the soft ground reinforcing construction method and the subsidence structure restoration method. 110Reinforcing the reference surface 120Improving the lower ground 130Restoring the upper ground