Comprehensive frost heaving control method for stratum during construction period of subway tunnel freezing method

The invention discloses a comprehensive stratum frost heaving control method in the construction period of a subway tunnel freezing method, which comprises the following steps: S1, determining a frost heaving area, and setting a frost heaving control area; s2, laying freezing pipes, and freezing in different areas; s3, distribution of loop temperature measuring points; s4, limiting holes are formed, and instant unfreezing is conducted; s5, monitoring settlement of the earth surface and surrounding buildings, and performing real-time control; and S6, pressure relief holes are formed, and pressure is reasonably relieved. According to the subway tunnel freezing construction environment characteristics, the expansion speed and the influence range of the freezing wall are effectively controlled according to the requirement for the accuracy of frost heaving control in the freezing construction period. In addition, the method can effectively release the stratum frost heaving energy according to time and space charac