Wuzhong Group double spiral shield machine power off the Hangzhou subway construction

The double-helix composite earth pressure balance shield machine at this trip, excavation diameter of 6.49 meters, total length of 88 meters, total weight of 550 tons, this double spiral shield machine will be used in Hangzhou Metro Line 5 crossing the Qiantang River Digging tasks.

At present, the commonly used earth pressure balance shield machine cutters are single loading positions. However, when crossing the Qiantang River, complex geological conditions such as hard rock formation, pebble layer, high-viscosity soil layer, floating rock, high water pressure, and river bottom biogas must be faced. A single tool boring is used, which is difficult to excavate, and affects the construction period. , increase the cost and other issues. In this regard, Wuzhong Group adheres to the principle of “user-centered” and jointly develops composite cutter heads and double helix shields with Herrenknecht. It can flexibly switch hobs and cutters for complex geological features, ensuring maximum construction. Duration and driving safety.

The successful development of the double helix shield machine marked a key step for Wu Zhong to develop the composite shield. It will provide another major instrument for China's infrastructure and the “Belt and Road” construction. (This article comes from China Ordnance Industry Group)