| 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 |
| 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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