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Cone-wheel Slurry shield microtunnel boring Machine

NPD Series of Slurry shield microtunnel boring Machine are most suitable for condition of high underground water pressure and various soil strata, commonly used for pipe diameter ranges from ϕ800 to ϕ3600 . The slurry system maintains the stability of the soil surrounding the pipe, enabling effective control soil settlement. It can also perform continuous unearthed action and the speed of pushing forward is fast.

Slurry shield microtunnel boring Machine has two types according to their different design in different application: Disc-type and Cone-type. each type can be manufactured in different size and configuration.

Slurry shield microtunnel boring Machine is capable of running for single long shaft length (up to 200m) without interjack shell.

 

 

Specifications of NPD Slurry Shield microtunnel boring Machine

 

Features of the Cone-wheel slurry machine:
1) Applicable for wide range of soil property: from soft soil and clay to hard soil and decayed rock.
2) The cone behind the cutter disc will crush the spoil one more time in the chamber.
3) Higher jacking force can be reached through hydro-system
4) Independent water/slurry injection system with cleaning device on cutter head/cutter blades to ensure its well function well even in hard soil strata. And also the grouting system (bentonite) will reduce the friction between soil and pipe/machine shell
5) Fast excavation speed can be up to 200mm/min
6) The simple construction and remote control for various functions will reduce the running cost to a minimum while obtaining safety and reliability

 

 

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