Phase-field modeling of frost propagation of cracks for rock mass under frost action

被引：0
|
作者：
Lü Z. [1 ]
Wu M. [1 ]
Duan J. [1 ]
Huang Y. [1 ]
机构：
[1] School of Infrastructure Engineering, Nanchang University, Nanchang
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2023年 / 45卷 / 11期
关键词：
double cracks; frost propagation; phase-field method; rock mass; single crack;
D O I：
10.11779/CJGE20220871
中图分类号：
学科分类号：
摘要：
As the rock masses in cold regions freeze, water in cracks turns into ice and expands in volume, and the mechanical interaction between ice and rock may lead to the frost propagation of cracks. To study the prediction method for the frost propagation of cracks and further cognize the laws of the frost propagation under different conditions, the phase-field model which represents cracks in a diffusive way with a scalar field is introduced to simulate the frost propagation, and the method for the equivalent thermal expansion coefficient is utilized to simulate the volume expansion of ice in cracks due to phase transition. Moreover, the governing equations for stress field for ice-rock interaction and the governing equations of phase-field evolution for the frost propagation of cracks are solved through the COMSOL Multiphysics software. Numerical simulations with the phase-field model on the frost propagation are conducted based on a series of frost propagation experiments on the rock masses. The numerical results are similar to the experimental ones for both the frost propagation of a single crack under different dip angles and external loads, and the frost propagation of double cracks under different dip angles of rock bridge and different intersection angles. It is indicated that the phase-field model established can accurately simulate the frost propagation of cracks in the rock masses. Furthermore, when subjected to an external load, the frost propagation of a single crack deflects towards the direction of the load. For the double cracks with different dip angles of rock bridge, the frost propagation of inner tips always deflects towards the adjacent crack due to the interaction of two cracks, while the outer tips propagate approximately along the coplanar direction. For double cracks with different intersection angles, two independent new frost cracks in a butterfly shape will form when the two cracks are parallel to each other, while new frost cracks in a radiation shape will form for the double cracks with an inclined intersection angle. © 2023 Chinese Society of Civil Engineering. All rights reserved.
引用
收藏
页码：2258 / 2267
页数：9
相关论文
共 30 条
  • [1] LIU Quansheng, HUANG Shibing, KANG Yongshui, Et al., Advance and review on freezing-thawing damage of fractured rock, Chinese Journal of Rock Mechanics and Engineering, 34, 3, pp. 452-471, (2015)
  • [2] DAVIDSON G, NYE J., A photoelastic study of ice pressure in rock cracks, Cold Regions Science and Technology, 11, 2, pp. 141-153, (1985)
  • [3] HUANG Shibing, LIU Quansheng, CHENG Aiping, Et al., Preliminary experimental study of frost heaving pressure in crack and frost heaving propagation in rock mass under low temperature, Rock and Soil Mechanics, 39, 1, pp. 78-84, (2018)
  • [4] QIAO Chen, WANG Yu, SONG Zhengyang, Et al., Experimental study on the evolution characteristics of cyclic frost heaving pressure of saturated fractured granite, Rock and Soil Mechanics, 42, 8, pp. 2141-2150, (2021)
  • [5] BOST M, POUYA A., Stress generated by the freeze–thaw process in open cracks of rock walls: empirical model for tight limestone, Bulletin of Engineering Geology and the Environment, 76, 4, pp. 1491-1505, (2017)
  • [6] LU Zhitao, XIA Caichu, WANG Yuesong, Frost heave and freezing processes of saturated rock with an open crack under different freezing conditions, Frontiers of Structural and Civil Engineering, 14, 4, pp. 947-960, (2020)
  • [7] JIA H, LEITH K, KRAUTBLATTER M., Path-dependent frost-wedging experiments in fractured, low-permeability granite, Permafrost and Periglacial Processes, 28, 4, pp. 698-709, (2017)
  • [8] TAN X, CHEN W, LIU H, Et al., A unified model for frost heave pressure in the rock with a penny-shaped fracture during freezing, Cold Regions Science and Technology, 153, pp. 1-9, (2018)
  • [9] LIU Quansheng, HUANG Shibing, KANG Yongshui, Et al., Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature, Chinese Journal of Geotechnical Engineering, 37, 9, pp. 1572-1580, (2015)
  • [10] LIU Quansheng, HUANG Shibing, KANG Yongshui, Et al., Preliminary study of frost heave pressure and its influence on crack and deterioration mechanisms of rock mass, Rock and Soil Mechanics, 37, 6, pp. 1530-1542, (2016)
123