Study on Detour Degree of Underground Nodal Spaces in Cold Cities Based on Spatial Barrier Model Theory

Underground nodal space is an important part of the underground space environment as the focal point of pedestrian communication in underground space and the turning point of space sequence. With the gradual completion of China’s urbanization process, the high density of urban population has brought a series of problems to the city, from the perspective of ease of use of underground space to create a good underground space to alleviate the pressure of the urban population on the ground, and to solve the “urban disease” provides a good countermeasure. This paper improves the calculation method of detour degree of underground space based on spatial barrier model, and uses it to calculate the mean value of detour degree of each nodal space in underground complexes of cold cities, which is used for the measurement and calculation of its accessibility, to provide a program for the quantification of the accessibility of underground space, and to provide a proposal for the spatial creation of the underground nodal space, so as to provide ideas and suggestions for the improvement of the detour degree of underground nodal space in cold cities in the future.