Coal Geology & Exploration


In order to explore whether the new pipe curtain freezing method can effectively strengthen the river embankment, this paper uses the finite element software to study the application of the new pipe curtain freezing method in anti-seepage and embankment reinforcement based on the temperature field, and sets up four analysis paths to deeply analyze the basic situation of the frozen soil curtain and the freezing effect characteristics of each path. The results show that the frozen soil curtain spreads around after it is formed at the freezing pipe. From the 8th day, the development of the frozen soil curtain on the upper side of 0.5 m depth begins to “accelerate”. Compared with the frozen soil curtain on the other side, it has faster development, higher strength and denser freezing. After freezing, the frozen soil curtain on the upper side of 0.5 m depth is uniform and dense; the minimum temperature on the slope can be reduced to −25.34℃, and the temperatures at each observation point are below −24℃. The final freezing temperature and cooling rate show “M” type characteristics. The embankment surface started to freeze at the earliest on the 11th day, and the frozen soil covered the whole embankment surface on the 14th day. The relationship between the final freezing temperature and depth is an exponential function. There is a great difference in the freezing of the steel pipe boundary of the pipe curtain. The highest temperature point and the lowest temperature point are −24.94℃ and −2.89℃ respectively, with a difference of about 22℃. The minimum thickness of the frozen soil curtain is about 0.78 m. The obtained results can provide reference basis for relevant practical projects in the future.


new type of pipe curtain, manual freezing, river embankment, anti seepage and reinforcement, temperature field, path analysis




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