城市地下综合管廊施工数值模拟方法

Numerical Simulation Method of Utility Tunnels Construction

为了分析城市地下综合管廊施工中锚栓和拼接缝受力变形规律,采用土体非线性弹性本构模型对土体的地层变形进行了表征,提出了一种装配式地下综合管廊施工过程的有限元数值模拟方法,实现了隐式计算方法中材料非线性及接触非线性问题的求解.结果表明:该分析方法避免了隐式计算方法中土体弹塑性本构模型及接触非线性问题导致的计算不收敛.反映了管廊施工过程中土体非线性力学行为以及管廊-土体之间的相互作用,为城市综合管廊建设提供了新的数值模拟方法.

In order to analyze the deformation of the anchor and splicing seam in construction of city underground utility tunnels,the soil strata deformation are characterized by the nonlinear elastic constitutive model. A simulation method of finite element of a prefabricated underground utility tunnels construction process is proposed to achieve the implicit calculation in the material nonlinear and contact nonlinear problems. The results show that the method avoids the non convergence of the elastoplastic constitutive model of the soil and the contact nonlinear problem in the implicit calculation method. The nonlinear mechanical behavior of soil and the interaction between utility tunnels and soil during the construction of utility tunnels provide a new numerical simulation method for the construction of underground utility tunnels.