In this study

the Que’er moutain tunnel in the project of No. 317 national highway was investigated

and the frost heaving force of the moraine stratum at the entrance of the tunnel was measured in-situ by the self-designed test method. Meanwhile

the thickness of the freeze-thaw circle and frost-heaving force in the cold region was obtained by combining the numerical simulation and the theoretical calculation. Based on the frost heaving stress measured inside and outside the lining structures

the axial force

the bending moment distribution

and variation law of lining structure were calculated and compared with the existing research results. The results show that moraine stratum in the cold region

as the regular seasonal frozen soil in the plateau

are significantly affected by low temperature

and the thickness of freeze-thaw circle is about 2 m under low temperature for 22 hours. The frost heaving pressure is 19.8?158.3 kPa by frost heaving force calculation

while it is 40?240 kPa from the in-situ measurement. Besides

the smallest frost heaving pressure is found at the arch foot

while the largest value is at the inverted arch. The changes and distribution rules of the stresses inside and outside the lining structures in the moraine stratum are complex and different under the freezing and thawing conditions. The axial force and bending moment of the lining in the frozen state are fan-shaped and butterfly-shaped distributions

respectively. Compared with related research results

the in-site testing method is more reasonable

and the results are more accurate.