| Construction details | High-density slurry type pipe jacking method with compatible type for underground obstruction |
|---|---|
| Method | Milling mole method |
| Completion date | Dec. 2017 |
| Location of Construction | Shinagawa-ku, Tokyo |
| Ordering party | Shinagawa City Disaster Prevention Town Development Department River Sewerage Division |
| Pipe diameter | φ1650㎜ |
| Distance | L=68.6m (Curve with R30m, R75m) |
| Type of soil | Silty sand |
| Gravel size |
| Nominal diameter | φ1650㎜ |
|---|---|
| Distance of pipe jacking | L=68.600m |
| Type of soil | Silty sand |
| N value | Average 31 |
| Percentage of gravel | - |
| Maximum gravel size | - |
| Groundwater level | GL-2.85m |
| Overburden | Average 5.9m |
| Underground obstacles | H-beam(300mm), existing manhole wall |
| Construction period | Sep. 2017～Dec. 2017 |
H-beam and existing manhole wall were cut.
・H-beam(300mm), cutting length 390mm
・Existing manhole wall, cutting length 675mm
There was no problem in cutting H-pile, and it was possible to cut at about 0.1 mm / min.
The existing manhole wall was cut in the curve section of R75m.
Discharged metal pieces
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