椭圆形隧道人工冻结地表位移的随机介质模型

Stochastic Medium Models Surface Displacement of for Artificial Freezing Elliptical Tunnel

针对椭圆形隧道人工水平冻结法支护建立了地表位移的随机介质模型,得到了地表冻胀位移、开挖位移、融沉位移和总位移的解析解。经过工程实例计算结果与大型物理模型试验结果相比较,其地表胀位移、开挖位移、融沉位移和总位移的差值分别为4.8 mm,1.6 mm,1.0 mm和2.2 mm。计算结果表明,椭圆形隧道人工水平冻结法支护的随机介质模型能够较好地反映出地表位移规律,计算结果能满足工程要求。

Aiming at the artificial freezing elliptical tunnel supporting,sets up stochastic medium models of surface ground displacement and the analytical solutions of the whole displatement are attained.By the comparison of the engineering calculation results and the large physical model test results,the difference of surface displacements in heaving,excavation,thawing and total are 4.8 mm,1.6 mm,1.0 mm and 2.2 mm respectively.Calculation results show that stochastic medium models of arificial freezing elliptical tunnel supporting can well reflect the surface displacement and can meet the engineering requirement.