In modern urban construction, the construction of underground tunnels has become an important means to solve traffic congestion and urban planning. In the construction process of underground tunnels, the TBM (shield boring machine) cutterhead plays a key role.

1. Structural characteristics of TBM cutter head

1.1 Type of cutterhead: According to geological conditions and engineering requirements, TBM cutterheads can be divided into two types: disc cutterheads and scalloped cutterheads. The disc cutterhead is suitable for harder rocks and hard soil layers, while the scalloped cutterhead is suitable for soft soil layers and soft rock geology.

1.2 Tool design: The cutters on the TBM cutterhead are usually made of high-hardness materials, such as carbide or brazed cutter heads. The shape and arrangement of the cutting tools are optimized according to the geological conditions to provide the best cutting results.

1.3 Back grouting system: In order to ensure the stability of the tunnel, the TBM cutterhead is usually equipped with a back grouting system, which forms an annular support wall through sprayed concrete or other support materials to prevent ground collapse.

2. The important role of TBM cutterhead in underground tunnel construction

2.1 Improve construction efficiency: The efficient cutting capability and continuous operation characteristics of the TBM cutterhead greatly increase the construction speed of underground tunnels. It enables fast, precise cutting, significantly reducing construction time and costs.

2.2 Protect worker safety: Since the TBM cutterhead can perform most of the work underground, it reduces direct contact with workers, thus improving worker safety. Workers can operate in the safe room of the shield machine to reduce operating risks.

2.3 Protect the environment: Using TBM cutterhead for underground tunnel construction can reduce the impact on the surface environment.