| Construction details | Sewer pipe (sewage pipe) laying work |
|---|---|
| Method | Cobra method Others |
| Completion date | Mar. 2020 |
| Location of Construction | Taisho-ku, Osaka city, Osaka |
| Ordering party | Osaka City Gulf Bureau |
| Pipe diameter | φ450mm |
| Distance | 153.510ｍ（11.960m,71.550m,70.000m） |
| Type of soil | 玉石混じり礫質土 |
| Gravel size |
| Nominal diameter | φ450mm |
|---|---|
| Distance of pipe jacking | 153.510ｍ（11.960m,71.550m,70.000m） |
| Type of soil | Sand gravel mixed cobbled stone |
| N value | 16～37 |
| Percentage of gravel | - |
| Maximum gravel size | - |
| Groundwater level | GL-2.7m～GL-2.9 |
| Overburden | 3.53m～3.70m |
| Underground obstacles | |
| Construction period | Aug. 2019～Mar. 2020 |
Sewer pipe (sewage pipe) laying work
・ Pipe jacking work (Cobra method) Steel pipe φ450 mm ・ Insert PVC pipe φ300 mm
3 spans total length 153.50m
・ Pipe jacking work (Rockman Ace method) Steel pipe φ400 mm ・ Insert PVC pipe φ250 mm 4 spans total length 192.80 m
・ Pipe jacking work (baby molding method) Steel pipe φ400 mm ・ Insert PVC pipe φ250 mm 1 span total length 3.20 m
・ Removal works Lump-sum
・ Earth works Lump -sum
・ Attached works Lump-sum
・ Temporary work Lump-sum
・ Shaft construction Lump-sum
・ Auxiliary ground improvement work Lump-sum
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