In general

uneven frost heave deformation was generated in upper soil strata during the freezing reinforcement process of shield junction

which was caused by the frost heave effect of the irregular frozen wall. Hence

this study was to obtain the influence law of strata deformation caused by the frost heave effect. Based on the similarity theory

a model test was carried out according to the prototype of the freezing reinforcement project of shield junction in Shanghai

and then the deformation data were analyzed. The results show that the upper strata deformation caused by the frost heave increases linearly with increasing the frozen wall thickness in the freezing process. When the development of the freezing wall exceeded the measuring point

the stratum deformation at the corresponding position no longer changed. It is found that the frost heaving force caused by the frost heave extrudes the upper strata in the freezing process

which increases both the strata deformation and its average strain with increasing the depth of measuring points. When the frost heave force exceeds the cohesion of soil

the growth of the average strain terminates due to the slide occurrence in upper soil layers. Moreover

the strata are no longer subjected to compress

and the deformation of the bottom stratum transfers directly to the upper strata. The results indicate that the frozen wall thickness is the primary factor and the formation depth is a secondary factor

which both affect the upper strata deformation .