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Home > R & D and Technologies > Shield Tunneling Methods > DK Pipe Jacking Method
This Method is a modification of DK Shield Method for smaller diameter tunnels such as for sewage, water or gas supplies and power & telephone cablings etc. Construction cost is less expensive than DK Shield Method. Daiho has successfully completed hundreds of small diameter tunnels by this methods. This Method is suitable for excavation under below-mentioned conditions;


Excavation Machine
1) Sub-surface Condition: sandy, gravel, large gravel, cobble, silt and volcanic layers
2) Pipe Material: reinforced concrete or ductile cast iron
3) Pipe Diameter: 800mm~3000mm
4) Length: maximum 1,000m
5) Applicability: shallow overburden, crossing river/railway/road, sharp curve excavations
Conceptual Illustration
Real Application to Projects