摘要
隔热层经常被用于多年冻土隧道中,来防止隧道结构的冻融破坏。文章根据多年冻土特点及优化理论,推导了多年冻土隧道隔热层的数学优化模型;并以风火山隧道为例进行求解,分析研究了隔热层用于多年冻土隧道的合理性和经济性。结果表明,该多年冻土隧道隔热层的数学优化模型是合理的,求解方法是可行的;对于多年冻土隧道,地表温度对隧道围岩影响深度是有限的,因此多年冻土隧道隔热层应根据隧道埋深、年平均温度以及年较差分段设计,才能达到既合理又经济的目的。
A thermal insulation layer is often used in permafrost tunnels to protect the tunnel structure from freeze-thaw damage. In this paper, in order to study the rationality and economy of the thermal insulation layer, a mathematical optimization model for the insulation layer in a permafrost tunnel was derived based on the characteristics of l）ermafrost and optimization theory, and a solution was conducted by using the Fenghuoshan Tunnel as an example. The results show that this mathematical optimization model for the insulation layer is rational and the solution method is feasible; as for the permafrost tunnel, the effect of surface temperature on the surrounding-rock temperature is limited with increased depth, so the insulation layer used in permafrost tunnels should be designed according to the tunnel depth, annual average temperature, and the annual range.
出处
《现代隧道技术》
EI
北大核心
2014年第4期127-132,共6页
Modern Tunnelling Technology
基金
国家自然科学基金项目(项目编号:40701038)
关键词
冻土隧道
隔热层
优化设计
数学模型
Permafrost tunnel
Thermal insulation layer
Optimal design
Mathematical model
