| Construction details | High-density slurry type pipe jacking method with compatible type for underground obstruction |
|---|---|
| Method | Milling mole method |
| Completion date | May. 2016 |
| Location of Construction | Sakai city, Osaka |
| Ordering party | Sakai City Waterworks and Sewerage Bureau Waterworks Department Engineering works Section 1 unit |
| Pipe diameter | φ800㎜ |
| Distance | L=72.3m |
| Type of soil | Gravel soil |
| Gravel size |
| Nominal diameter | φ800mm |
|---|---|
| Distance of pipe jacking | L=72.375m |
| Type of soil | Gravel soil |
| N value | 7～57 |
| Percentage of gravel | 43.1% |
| Maximum gravel size | 114mm |
| Groundwater level | GL-2.69m |
| Overburden | 6.15m |
| Underground obstacles | There was a possibility that RC structures or stone masonry (wedge stone) existed. Thickness 80 cm |
| Construction period | May. 2016～Jul. 2016 (Daytime work 8.0h) 2.0 months |
Discharged wedge stone
Discharged wedge stone
TBM arrival status
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