Process freezing ground without upheaval or subsidence

摘要

In the ground freezing method for underground excavation, caliber 500 ~ 1000 a large diameter pipe reinforcement ( 1) installed in a horizontal line on the underground structure, and that the reinforcement tube kojyeo installation (1) U-shaped pipe freezing (F) the inlet of the small diameter of the aperture in the 100 (2) and the outlet (2 ') is to the outside installed to be horizontally fixed, and then exposed, and then curing by pouring concrete (4) between the reinforcing tube of the larger diameter (1) and the freeze pipe of small diameter (F), the U-shaped small-diameter pipe freezing (F ) of the inlet (2) and the outlet (2 ') to be frozen by circulating refrigerant in the reinforcing tube (1) outside the thickness of the concrete foundation and the reinforcement in the large-diameter tube (1) of the large-diameter through the whole freeze-ground ( the thickness of 7) Ground Displacement of normal width of underground excavation (relaxation area) (3m) than the uplift or subsidence of the ground by the inflation pressure of the frozen ground allows By digging the ground for underground structures installed in thin conditions has not been a ground freezing uplift and subsidence of the ground does not have to excavate soil without damaging buildings or structures on the ground.