Recently, the construction site of the underground connection tunnel of Shenzhen Banxuegang Science and Technology City and Shenzhen Metro Line 10 ushered in a permanent Chinese-made permanent magnet driven rectangular pipe jacking machine. This equipment is CRCHI, and it is also the first time that China has independently developed it, and it has been delivered to construction sites.
This device is different from the previous round shield machines, and its shape is rectangular. This design makes the effective use area increase by more than 20%, and it can use underground space more scientifically and reasonably. When the excavation is started, the rectangular pipe jacking machine occupies a small area, which is suitable for tunneling in shallow soil and short distance conditions. It is more economical and applicable than the circular shield machine and the construction efficiency is greatly improved.
This equipment is firstly driven by a permanent magnet variable frequency motor, which has the advantages of small size, high efficiency, energy saving and environmental protection, stable performance, reliability and durability. In addition, the drive mechanism of its six cutter heads can be turned back into the oven to create six small-diameter circular shield machines, which is in line with the current environmental protection concept.