摘要
冻害是寒区隧道常见的工程病害,造成冻害的原因很多,其中冻胀力是寒区隧道冻害发生的主要原因。因此,在寒区隧道的研究中,要避免和减轻寒区隧道工程中冻害的发生,最关键的问题是研究冻胀力的发生、发展以及怎样预防或消减冻胀力,对寒区隧道的冻害机理及防治方法进行了系统的研究。提出了冻胀现象产生必须同时满足的三个条件:有能使水结成冰的足够低的温度、衬砌必须提供阻止水体结冰膨胀变形足够的刚度、有足够的水源,并由此提出防治冻害的研究方向即采取措施使三项条件有一条不满足即可有效地防止冻害。利用ANSYS有限元对寒区隧道冻胀力进行了数值模拟,通过对理论计算结果和数值模拟结果的比较分析,提出寒区隧道冻胀力的基本防治措施,对寒区岩石隧道工程的设计和施工具有指导意义。
Freezing damage is a common engineering disease, there are many reasons to cause the freezing damage , the frost heaving force is the main of them. Therefore, in the study of cold region rock tunnel, to avoid and reduce freezing damage,the key issue is to study the occurance、expansion and the prevention of the frost heaving force. This paper has carried out a systematic study on the frost damage. There are three factors causing frost heaving, first, the temperature must below enough for water freezing; second, the lining must have enough rigidity to prevent the expand of water at its freezing and the third enough water source. According to elastoplasticity mechanics computing method, using finite element method software ANSYS to set up a 3 - D Model to calculate and analyze the frost heaving force under different modulus of elasticity or weather. Comparing the results of theoretical analysis and numerical simulation, the prophylactico - therapeutic measures for frost heaving force of rock tunnel in cold region are advanced, They may serve as guidance for design and construction of cold region rock tunnel.
出处
《地下空间与工程学报》
CSCD
2007年第z2期1484-1489,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金资助项目(40372119)
教育部优秀青年教师基金资助项目(2091)。
关键词
岩石隧道
冻害机理
防治研究
rock tunnel
freezing damage mechanism
prevention and cure
