Tunneling slurry treatment and discharge standards innovative applications of technology, reflects the Railway Tunnel person’s social responsibility and environmental protection play, as its practice of building “Beijing beautiful, beautiful China” promises powerful interpretation.

Sediment slurry shield excavation is to use mud as the intermediary for transport, namely cutter tool cutting down mud mixed sediment excavation and transport feed tray compartment, through mud pump to the ground by the pipeline Slurry Processing Factories in the mud processing plant processing equipment through mud dewatering. Handled in accordance with the provisions consumptive sediment, water is returned mud pools, endless conveyor to shield the front of the excavation compartment.

Beijing underground diameter line railway crossing shield construction sand and gravel, clay composite formations, bentonite mud modulation selection, environmentally friendly materials like pulp. With the screening, grit removal, in addition to mud, centrifugation, filter press, “five” process, and joint research with domestic manufacturers significantly improve the performance of centrifuges, the project to ensure that the “zero pollution discharge standards.” Meanwhile, equipment integration and optimization space layout, they also achieved a small factory construction site. Project Department developed complex type wear line of patented technologies, to solve the Sand and Gravel Formation during long distance driving circulation system abrasion problem, reduce the construction noise, truly a “green construction.”

Although Slurry Shield settlement precise control ability is much higher than other underground engineering and construction engineering methods, but required the traditional mud treatment technology in tunneling required to deal with the venue and other conditions extremely difficult to meet the urban sewage discharge standards, resulting slurry shield has been unable in the city widely used. Therefore, the city must not only ensure the use of slurry shield cutting down can be routed to the ground sediment separation, but also in the context of “zero pollution dischar