| Construction details | High-density slurry type pipe jacking method with compatible type for underground obstruction |
|---|---|
| Method | Milling mole method |
| Completion date | Feb. 2017 |
| Location of Construction | Kita-ku, Tokyo |
| Ordering party | Urban Renewal Agency East Japan Rental Housing Headquarters |
| Pipe diameter | φ1500㎜ |
| Distance | L=26.900m |
| Type of soil | Sand mixed with clay |
| Gravel size |
| Nominal diameter | φ1500㎜ |
|---|---|
| Distance of pipe jacking | L=26.900m |
| Type of soil | Sand mixed with clay |
| N value | 15 |
| Percentage of gravel | - |
| Maximum gravel size | - |
| Groundwater level | GL-9.956m |
| Overburden | 9.63m |
| Underground obstacles | Diaphragm wall x 2 places, H-beam(400mm) in the wall x 2 numbers, H-beam(400mmx400mm), Metal objects 150mm |
| Construction period | Dec. 2016～Feb. 2017 |
Initially, two diaphragm walls were confirmed on the planned route, so the milling mall method was adopted. However, as a result, we cut two diaphragm walls, H-beam(450 mm) and metal objects(150 mm).
Cutting of underground obstacle
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