| Citation: | ZHONG Bo，SONG Ling，LEI Bingbing，et al. Large-scale triaxial test analysis on geocell-reinforced effect of coarse-grained soil under freeze-thaw cycles[J]. Bulletin of Geological Science and Technology，2025，44（6）：1-10 doi: 10.19509/j.cnki.dzkq.tb20240096
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Focusing on the application of coarse-grained soil fillings in alpine mountainous regions, this study aims to analyze the reinforcing effect of geocell-reinforced coarse-grained soil under freeze-thaw cycles.
Cyclic freeze-thaw tests and large-scale triaxial unconsolidated-undrained (UU) compression tests were conducted on both geocell-reinforced and unreinforced coarse-grained soil.
The results show that the reinforcing effect of the geocell is significant when the axial strain exceeds 2%, compared to unreinforced coarse-grained soil. However, the shear strength, elastic modulus, and cohesion of the geocell-reinforced coarse-grained soil generally decrease as the number of freeze-thaw cycles increases, while the difference of the internal friction angle between the geocell-reinforced and unreinforced coarse-grained soil is small, with a maximum of value 2.08°. Therefore, by introducing the reinforcing effect coefficient, it is proven that the geocell reinforcement effect can be well quantified.
It is concluded that the geocell still demonstrates a certain reinforcing effect with an increase within 15 freeze-thaw cycles, although the reinforcement effect of the geocell decreases with the increase in freeze-thaw cycles.
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