中文摘要：

针对Peck公式在预测隧道施工引起地面沉降中不能考虑上覆土体体积变化的局限性,根据随机介质理论,建立了基于扩散传播方程可以考虑上覆土体体积变化的土体变形计算模型,以地面沉降分布为其边界条件,求得隧道上覆土层变形的计算表达式.在此基础上,利用典型工程案例实测数据拟合反分析了模型参数.计算结果分析表明：考虑隧道施工引起土体体积变化的计算模式更符合实际情况,并总结了模型计算参数的取值与土体性质的关系,为隧道施工引起上覆土层变形的预测提供了一条合理的途径.

英文摘要：

Since volumetric change of overburden soil was not considered in Peck formula to predict the surface settlement caused by tunneling,a soil deformation calculation model was established based on the diffusion-convect equation according to stochastic medium theory.The computation expression of the soil deformation above the tunnel was derived by setting surface settlement distribution as a boundary condition.Model parameters were analyzed by fitting measured data in typical engineering cases.Analysis results showed that it was more aligned with actual situation to consider the volumetric change of overburden soil on the calculation mode.The relationship between the model calculation parameter values and soil property was concluded to predict the overburden soil deformation for the tunnel construction.