The segment geometry and materials are defined according to the tunnel geometry layout. As each tunnel is unique, so are its segment and mould. The mould being entirely dependent on the segment geometry, its engineering can only be made according to the segment concrete design. Therefore, the design ability of mould manufacture is very important. The factory possess a strong design team                                                                                                         

A segment mould is composed of a bottom part, four side walls and two covers. The mould length can be several meters long depending on the ring size, which requires a tenth-millimetre scale adjusting accuracy. To get so high precision, factory use modern facilities and strictly quality control.

From material purchase, each stage is under strictly quality control.

CNAS Lab for material test

               Spectrum analyze                                                                                                          Chemical Analysis lab

Release welding stress by vibration

Welding Test

Our production