Abstract 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 permafrost 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.
Abstract：
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 permafrost 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.
ZHOU Yuan-Fu-1,
ZHANG Xue-Fu-2
.Optimization Design of Parameters for the Thermal Insulation Layer
in Permafrost Tunnelling
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(4): 127-132
2014, Vol. 51 