Medan Sewerage Network Project
Medan is the fourth largest city in Indonesia, located on the island of Sumatra, with a population of over 2 million. A sewerage network is a vital infrastructure in Medan, with high demand. In congested Medan, traditional open cut construction methods are no longer suitable, so pipe jacking construction methods were applied.
Machine used：Unclemole TCC800
| Outside diameter | 980mm |
| Body length | 2,592mm |
| Weight | 4,800kg |
| Maximum gravel diameter | 320mm |
The Unclemole TCC 800 is a slurry tunneling machine that is best suited to the soil conditions in Medan. Due to concerns about sudden heavy rains, a locking door was installed to prevent flooding.
Soil conditions
Medan’s soil type varies from silty sand to gravelly sand. Uncle Mole can handle a variety of soil conditions, including clayey soil, sand, silt, gravel, and boulders. Iseki’s instructors supported the local construction company, which was attempting tunneling work for the first time, and taught them how to control the machine and how to manage the entire tunnel construction. The client, who was eager to learn new technology, became confident in controlling the machine and achieved a maximum progress of nearly 20 meters per day.
Construction conditions
| Project name | Medan City Sewerage Link Project |
| Total extension | 4km |
| Soil quality | Silt, sand, gravel, boulders |
| Construction Period | June 2019 – May 2020 |