Research On Freezing Technology Of Inclined Shaft With Deep And Thickness Water-rich Soil

This paper is based on the Pang Pangta project construction of inclined shaft engineering geological conditions. To solve the technology challenges of inclined shaft freezing, we have carried out a study on the theory of piecewise straight holes freezing of inclined shaft; It is based on the characteristics of surrounding rock stability and the principle of freezing of the inclined shaft of large-angle and large section. At the same time we completed the numerical simulation study on the key parameters of piecewise straight holes freezing of inclined shaft with ANSYS.A research on temperature field under many rows of freezing pipes is conducted through similarity simulation experiment. By monitoring process of freezing and shaft excavation, we get a lot of useful data to ensure the construction quality and optimized the freeze parameters.Established a vertical freeze technology which is useful when crossing the thick water-rich epipedon to builde the inclined shaft of large-angle and large section. It successfully solved the freezing problem under the deep thick water-rich epipedon and the problem of optimizing the freeze parameters. This technology has important theoretical significance and practical value.