Tunnel boring machines are used forTunnel boring machine (TBM) using the shield methodThe construction method of the shield tunneling machine involves constructing (laying) the tunnel while advancing.Shield"(referring to the supporting segment), it differs from the open-cut construction method. The shield machine varies according to its working principle.Soil Pressure Balancing Machine，Open-chest shield machine

，Air pressure shield tunnel boring machineSoil and Water Pressure Shield Tunnelling Machine, Multi-Circular Tunnelling Machine, Rectangular Tunnelling Machine, TBM Tunnelling MachineTrenchless Pipe Jacking Machine）。

1. Tunnel boring machine model scale: 1:15, strictly according to the drawing specifications. Model diameter is approximately 400mm, length 3000mm.

2. The model appearance and color of the tunnel boring machine are painted according to the actual color requirements of the machine, with a strong metallic feel. Additionally, the front part of the machine is marked with a "logo" abbreviation.

3. The tunnel boring machine model is primarily made of acrylic glass, glass fiber reinforced plastic, and engineering plastics. Some transmission components are made of metal, and all parts are painted with the actual color. The model showcases four dynamic simulations, including the uniform rotation of the cutting disc (electric simulation), the 360-degree uniform rotation of the segment assembler (electric simulation), the reciprocating movement of the hydraulic jack (electric simulation), and the electric demonstration of the helical conveyor.

4. The panoramic model showcases the structural composition of the tunnel boring machine, employing cross-section and perspective techniques to highlight the key features of the equipment and mechanisms. It dynamically interprets the working processes of each system through lighting, stereoscopic perspective, and electric rotation methods.

5. Power: Model operates on 220V, 50Hz, current ≤ 5A, bulb load voltage 3-6V, low-voltage safety equipment.