The box body prefabricates a compound ring enclosed type ground net, and an earthing pole is reserved at the upper part of the box body;

箱体预制复合环形封闭式地线网，并且在箱体上部留出接地极；

A simulation of dynamic forces acting on invert prefabricates in TBM construction tunnel is made with surrounding rock-structure model by using ANSYS software.

运用计算软件ANSYS，采用围岩—结构模式，对TBM施工隧道仰拱预制块进行模拟动态施工的受力计算研究。

Spatial core Liang prefabricates USES the integral-type assembling template, prefabricates in the field to concentrate the prefabrication, the flatbed transports by cart, crane installment.

空心板梁预制采用整体式拼装模板，预制场内集中预制，平板车拉运，吊车安装。