Kaisan-cho sewage pipe laying work

Construction details High-density slurry type pipe jacking method with compatible type for underground obstruction
Method Milling mole method
Completion date Sep. 2015
Location of Construction Sakai city, Osaka
Ordering party Sakai City Waterworks and Sewerage Bureau Sewerage Department Sewerage Construction Division
Pipe diameter φ1100㎜
Distance L=69.8m
Type of soil Sandy soil
Gravel size

Work summary

Nominal diameter φ1100mm
Distance of pipe jacking L=69.84m (Curve with R60m x 2 places)
Type of soil Sandy soil
N value 4~9
Percentage of gravel -
Maximum gravel size -
Groundwater level GL-1.98m
Overburden 6.15m
Underground obstacles Steel sheet pile (Type Ⅲ) 1 place
Construction period Daytime work (8.0h) Aug. 2015~Sep. 2015 (1.0 month)

It was considered that there was one steel sheet pile (Type III) on the pipeline. Since the road in the construction section is a arterial road with a lot of traffic & it is difficult to regulate traffic, we decided to cut this existing steel sheet pile (Type III) by the milling mall method.

As a result of construction, one steel sheet pile type III was cut.

Discharged metal pieces

Discharged metal pieces