Plastic solutions of a cold region tunnel under freeze-thaw cycles and non-uniform frost heave

被引：0

作者：

Zhang C. ^{[1
,2
]}

Gao B. ^{[3
]}

Zhou W. ^{[1
]}

Li H. ^{[1
]}

机构：

[1] School of Civil Engineering, Chang'an University, Xi'an

[2] Stake Key Laboratory of Geohazard Prevetion and Geoenvironment Protection, Chengdu

[3] School of Highway, Chang'an University, Xi'an

来源：

Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics | 2022年 / 54卷 / 01期

关键词：

Cold region tunnels; Freeze-thaw cycles; Non-uniform frost heave; Plastic solution; Volumetric frost heave ratio;

D O I：

10.6052/0459-1879-21-401

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Long-term freeze-thaw cycles of the seasonal cold region result in the deterioration of strength and deformation properties of surrounding rock, which make cold region tunnels easily reach a plastic state, and surrounding rock of a cold region tunnel displays the non-uniform frost heave mainly in radial direction. Based on the Mohr-Coulomb criterion, plastic solutions of the frost heaving force, stress and displacement for a cold region tunnel were presented. The proposed solution reasonably accounts for the deterioration of surrounding rock properties caused by freeze-thaw cycles and the non-uniform frost heave of surrounding rock. Meanwhile, the corresponding elastic solutions and a means to determine the elasto-plastic state of frozen surrounding rock were introduced. Furthermore, discussions and comparative verifications of the proposed solution were performed. Finally, the effects of freezing-thawing cycles, the non-uniform frost heave and volumetric frost heave ratio on stress distribution, plastic zone radius, wall displacement and frost heave force of cold region tunnels were investigated. It is indicated herein that the proposed solution has broad applicability and decent comparability, which is partly demonstrated by a plastic solution available in the reference. With increasing the number of freeze-thaw cycles, the frost heave force, wall displacement and plastic zone radius are increased by 20.3%, 8.44 times, and 2.16 times, respectively. It quantifies the deterioration effect of surrounding rock properties caused by long-term freeze-thaw cycles. When frozen surrounding rock is frost heaved from a uniform model to a non-uniform one, the frost heave force is increased by 42.8%, yet the radius of plastic zone is almost unchanged. Four parameters of volumetric frost heave ratio significantly affect the frost heave force, peculiarly the water-heat migration factor which leads to the increase of the frost heave force by 123.6%. The results of this study can provide some theoretical basis for the design and frost damage solving of seasonal cold region tunnels. Copyright © 2021 Chinese Journal of Theoretical and Applied Mechanics. All rights reserved.

引用

页码：252 / 262

页数：10

共 30 条

[1]

Xia Caichu, Lu Zhitao, Wang Yuesong, Advance and review on frost heaving force calculation methods in cold region tunnels, China Journal of Highway and Transport, 33, 5, pp. 35-43, (2020)

[2]

Xue Yiguo, Kong Fanmeng, Yang Weimin, Et al., Main unfavorable geological conditions and engineering geological problems along Sichuan-Tibet railway, Chinese Journal of Rock Mechanics and Engineering, 39, 3, pp. 445-468, (2020)

[3]

Lai YM, Wu H, Wu ZW., Analytical viscoelastic solution for frost force in cold-region tunnels, Cold Regions Science and Technology, 31, 3, pp. 227-234, (2000)

[4]

Feng Q, Jiang BS, Zhang Q, Et al., Analytical elasto-plastic solution for stress and deformation of surrounding rock in cold region tunnels, Cold Regions Science and Technology, 108, pp. 59-68, (2014)

[5]

Huang Jihui, Xia Caichu, Han Changling, Et al., Analytical solution of frost heave force acting on cold-region tunnel liner considering anisotropy frost heave of surrounding rock, Chinese Journal of Rock Mechanics and Engineering, 34, pp. 3766-3774, (2015)

[6]

Xia CC, Lu ZT, Li Q, Et al., Transversely isotropic frost heave of saturated rock under unidirectional freezing condition and induced frost heaving force in cold region tunnels, Cold Regions Science and Technology, 152, pp. 48-58, (2018)

[7]

Lu ZT, Xia CC, Wang YS, Et al., Analytical elasto-plastic solution of frost heaving force in cold region tunnels considering transversely isotropic frost heave of surrounding rock, Cold Regions Science and Technology, 163, pp. 87-97, (2019)

[8]

Zhang Shujuan, Lai Yuanming, Su Xinmin, Et al., A laboratory study on the damage propagation of rocks under freeze-thaw cycle condition, Chinese Journal of Rock Mechanics and Engineering, 23, 24, pp. 4105-4111, (2004)

[9]

Jia Hailiang, Xiang Wei, Shen Yanjun, Et al., Discussion of the key issues within calculation of the fatigue damage of rocks subjected to freeze-thaw cycles, Chinese Journal of Rock Mechanics and Engineering, 36, 2, pp. 79-90, (2017)

[10]

Tan XJ, Chen WZ, Yang JP, Et al., Laboratory investigations on the mechanical properties degradation of granite under freeze-thaw cycles, Cold Regions Science and Technology, 68, 3, pp. 130-138, (2011)

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