YD series Hard Rock pipe-jacking machines：

1. Equipped with rock cutterheads and hob cutters, capable of adapting to crushing high-strength rock.
2. Applicable to various complex geological conditions such as sandy soil layers, gravel layers, pebble layers, boulder layers, and rock layers.
3. Multiple transmission forms can be adopted to provide strong torque to ensure effective propulsion in hard rock.
4. During the construction process, workers can replace the hob cutters, reducing the equipment maintenance difficulty in construction and minimizing downtime.
5. After the first crushing by the hob cutters, secondary crushing is carried out by means of methods like twisting legs and shearing, which can further crush the rock into smaller particles.
6. Can achieve construction with a single tunneling length of over 1 kilometer, reducing equipment transfer and debugging work during construction and improving construction efficiency.