Experimental Study on the Dynamic Characteristics of Frozen Silty Clay and Its Influencing Factors

Zhang, Xiyin; Sun, Binjie; Xu, Z.; Huang, Anqi; Guan, Jiada

doi:10.3390/su15021205

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…Xu Feng [3] carried out finite element simulation on the soil of the canal base by filling, and the results showed that before and after filling, the lateral displacement of the trench was smaller than the change of lateral displacement when it was not filled. Li Haiyin [4] analyzed that before the soil moisture content reaches the saturated water content, the freezing rate of soil increases by 0.28% for every 1% increase in water content, and the freezing rate of soil increases by 0.17% for every 1°C decrease in temperature. Li Bin [5] showed through numerical simulation results that backfilling with sand and gravel materials can effectively inhibit the freezing antermate and reduce the freezing force.…”

Section: Introductionmentioning

confidence: 99%

Effect of Subsoil Replacement in Frost-Sensitive Areas on the Frost Deformation of Channel

Qi,

Wang,

Wang

2024

Atlantis Highlights in Engineering

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The water content of the subsoil is one of the main factors affecting the subsidence of the channel bank slopes, the looser the soil quality of the bank slopes, the greater the water content, the greater the deformation of the channel bank slopes, the use of non-freezing and expansion sensitive materials to replacethe bank slopes with wet subsiding soil is an effective way to solve the problem of frequent freezing and expansion of the channel bank slopes. In order to solve the problem of frozen expansion damage caused by groundwater level change and repeated freezing and thawing of seasonal frozen soil foundation in the cold and dry irrigation area in northwest China, ABAQUS software was applied to simulate the influence of the replacement of channel subsoil materials on the temperature and strain fields of the foundation by establishing a finite element model. The results show that: after the soil foundation in the frostsensitive areaof the channel is refilled with 30cm, 50cm and 70cm thick gravel and fine sand respectively, the frost deformation of thechannel bank slope and foundation is obviously reduced, an the reduction effect of gravel on the frost deformation is better than that of fine sand; with the increase of the thicknessof the refill, the reduction of frost deformation is also on adecreasing trend, and the influence of the channel subsoil refill on the temperature field of the foundation is smaller, but the subsoil will make the temperature field and strain field of the bank slope after the refill. After refilling, the frozen expansion displacement of the bank slope can be dissipated,which can significantly improve the deformation and stress concentration phenomenon on the channel seepage control lining structure. The research results can provide theoretical basis and technical support for the anti-freezing and expansionstructural modification of channels in permafrost areas.

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Section: Introductionmentioning

confidence: 99%