在井巷工程中,当采用冻结法施工穿过松散的不稳定表土层时,随着表土层厚度的增加和冻结温度的降低,在井筒施工过程中不断发生井壁压裂,冻结管断裂等事故。因而大大影响了井筒的施工速度和安全。为了解决以上问题,本文从冻结壁的强度和厚度的要求、冻结管受力分析、管材在低温条件下力学性能的变化及井壁受力情况分析,並提出合理的冻结温度范围。 In the shaft and tunnel engineering, when the freezing method is used to construct the loose unstable topsoil, along with the increase of the surface soil layer thickness and the decrease of the freezing temperature, the well wall fracturing and the freezing tube fracture occur continuously in the wellbore construction ACCIDENT. Thus greatly affecting the wellbore construction speed and safety. In order to solve the above problems, the paper analyzes the requirements of the strength and thickness of the frozen wall, the mechanical analysis of the frozen pipe, the mechanical properties of the pipe under low temperature and the stress of the shaft wall, and puts forward a reasonable freezing temperature range.