The immigration in Ankara metro was caused by 2 creek.

The secret of the migration that took place in Ankara metro line, which had a great impact in KOMUOYUN, was solved. Labor inspectors of the Ministry of Labor and Social Security, Ankara Kızılay-Çayyolu metro line in June, his examination of the migration resulted. Investigators, who were immediately following the migration, began to investigate whether the incident was related to the construction of the subway.
There is a distance of 12 meters
In this process, the inspectors met with representatives of the companies carrying out the construction of the metro as well as the police units and officials from the Ministry of Transport. In addition, the opinion of the technical delegations that examine the incident was applied. As a result of all these evaluations, it was found that subway construction had no direct effect on migration. Again in the same examination, the distance between the tunnel and the tunnel tunnel was determined to be 12 meters. As a result of the evaluations, it was determined that the two streams were found to be about 20-25 meters deep. It was determined that the point where the migration occurred was the point of merging of both streams. The water level of both streams increased with rainfall. Thus, increased rainfall caused abrasion in the soil at the junction of the streams. Upon this development, there was a dent on the surface.

Source : I haber.stargazete.co

Armin

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