›› 2016, Vol. 37 ›› Issue (S1): 521-529.doi: 10.16285/j.rsm.2016.S1.068

• 数值分析 • 上一篇    下一篇

低温环境下含表面裂隙硬岩温度场及冻胀演化过程分析

申艳军，杨更社，荣腾龙，刘 慧   

  1. 西安科技大学 建筑与土木工程学院，陕西 西安 710054
  • 收稿日期:2014-06-18 出版日期:2016-06-16 发布日期:2018-06-09
  • 作者简介:申艳军，男，1984年生，博士，副教授，主要从事低温裂隙岩体损伤及断裂特性方面研究工作。
  • 基金资助:
    国家自然科学基金（No.41302228，No.41272340）；中国博士后科学基金特别资助项目（No. 2014T70931）；中国博士后科学基金面上资助项目（No.2013M532070）；陕西省博士后科学基金面上资助项目（No.2014051）。

Analysis of evolution of temperature field and frost heaving in hard rock with surface cracks under low temperature environment

SHEN Yan-jun，YANG Geng-she，RONG Teng-long，LIU Hui   

  1. College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an，Shaanxi 710054, China
  • Received:2014-06-18 Online:2016-06-16 Published:2018-06-09
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41302228, 41272340) ,China Postdoctoral Science Foundation Funded Project (2014T70931，2013M532070) and Shaanxi Postdoctoral Science Foundation Funded Project(2014051).

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摘要： 寒区含表面裂隙硬岩与大气连通，易受外界低温环境引起裂隙内部水分凝结，造成裂隙带附近形成温度场突变，进而随水冰相变产生冻胀力，二者随着冻结活动处于动态演化之中，涉及到温度场、渗流场及应力场等多场问题。目前的研究大多依据数值模拟结果，描述裂隙岩体温度场、应力场分布特征及规律，考虑从基础理论解析计算角度，探究低温环境下裂隙岩体温度场、冻胀力演化规律鲜有报道。针对含表面裂隙硬岩在低温环境下发生的冻结现象，从传热学理论、相变理论、弹塑性力学及断裂力学理论等多角度出发，探讨随着冻结深入含表面裂隙硬岩内部温度场及冻胀荷载演化过程，提出对应解析表达式，引入多场耦合数值程序Comsol-Multiphysics进行数值模拟验证，结果表明，文中提出的温度场及冻胀荷载演化解析表达式与数值模拟结果具有较好吻合度，可满足对含表面裂隙半无限板模型温度场、应力场演化过程分析，对于裂隙岩体在低温环境下温度场、应力场演化及热-力耦合分析具有较好借鉴价值。

关键词: 表面裂隙, 温度场, 冻胀力, 冰水相变, Comsol-Multiphysics程序

Abstract: Hard rock in cold region with surface cracks contact with atmosphere, therefore water in cracks would congeal caused by low temperature environment. The temperature would be mutation near the cracks, and the expansion caused by phase transition would produce frost heaving force. While the temperature field and frost heaving force are in the dynamic evolution on the freezing effects. Because the complex multi field problems include temperature field, seepage field and stress field. At present, a lot of related researches are based on the results of numerical simulation to summarize the distribution characteristics and rules of temperature field as well as stress field in fractured rock masses. While considering the perspective of analysis and calculation on basic theory, study on the evolution of temperature field and frost heaving force in fractured rock mass under low temperature environment is rarely reported. Depending on the freezing phenomenon of hard rock with surface cracks under low temperature environment, and according to the theory of heat transfer, phase transition, elastoplastic mechanics and fracture mechanics. This paper explores the evolution process of temperature field and rost heaving load in hard rock with surface cracks. Corresponding analytical expressions are put forward and introduce to the multi-physics coupling program Comsol-Multiphysics to analog computation. Comparison results show that the evolution analytical expressions of the temperature field and the frost heaving load are very close to the numerical simulation. The expressions can basically be suitable for the evolution analysis of temperature field and stress field on the semi-infinite plate model containing surface cracks. So the study provides a good reference value to the temperature field and stress field evolution analysis in fractured rock mass under low temperature.

Key words: surface crack, temperature field, frost heaving force, ice water phase transition, Comsol-Multiphysics

中图分类号: 

  • TU 452

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