公路隧道衬砌断面型式模型试验研究

Model test study on sectional form of highway tunnel lining

通过室内模型试验,研究了在满足建筑限界、通风等约束条件下3种公路隧道衬砌断面型式(单心圆、尖三心圆、坦三心圆)在不同初始应力场作用下的受力性状。分析了初始应力场及断面型式对衬砌结构受力的影响。经综合比较,给出了较为合理的公路隧道衬砌断面型式。研究结论为今后合理地设计隧道衬砌结构提供了可靠的试验依据。

The behaviours of three different forms of lining section in highway tunnels were studied under different initial stresses （i.e., single-center circle, three-center sharp circle, three-center tabular circle）. Through the model tests the influences of the initial stresses and forms of lining section on performances of lining were analyzed, and a rational form of lining sectional for highway tunnels was presented.