Result

Sewer pipe laying work(No.28晴五-2)

Construction details Obstacle removal pipe jacking
Method Milling mole method
Completion date May. 2018
Location of Construction Chuo-ku, Tokyo
Ordering party Bureau of Urban Development Tokyo Metropolitan Government
Pipe diameter φ800㎜
Distance L=382.500m
Type of soil Cohesive soil (filled soil)
Gravel size 57mm

Work summary

Nominal diameter φ800㎜
Distance of pipe jacking L=382.5m (Curve with R500m)
Type of soil Cohesive soil (filled soil)
N value 平均6.5
Percentage of gravel 5%
Maximum gravel size 57㎜
Groundwater level GL-3.1m
Overburden 6.83m
Underground obstacles Steel sheet pile
Construction period Dec. 2017~May 2018

The TBM hit the steel sheet pile in front of the reception shaft, but the cutting was successful.

Gravel・floodwood

Cut iron powder

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