隧道支护结构荷载作用的随机反演

提出荷载－结构模式进行随机反分析方法，从隧道支护结构变形反算对应的荷载作用，可反推围岩抗力系数和覆土荷载的分布情况，以及作用于支护结构上各部位的外荷载。提出了以实测位移为基础的样条函数插值．以插值位移补充大量的实测值，满足了反分析所需众多的已知位移数。通过一施工实例对该方法的可行性进行了检验。

Stochastic Back Analysis of Load on Tunnel Lining Structure

stochastic back analysis through load-structure model is proposed to estimate load on tunnellining according to the measured deformation in tunnel lining structure. It can estimate the coefficient of passive resistance of rock, the distribution of load due to overlying strata and the node forces on lining elements.The spline interpolation function was proposed by means of the field-measured displacements of key liningpoints and was used to replace approximately the real displacement function. The large quantity of interpolation displacements of lining points arc complements to field measurement data in ibis back analysis. A casestudy on a tunnel lining structure is presented to illustrate the cffcctivcness of this method.