{"id":28558,"date":"2020-08-04T12:18:06","date_gmt":"2020-08-04T10:18:06","guid":{"rendered":"https:\/\/integral.ba\/dovodni-tunel-za-he-dabar-izvrsen-proboj-izmedju-napadnih-mjesta-3-i-4\/"},"modified":"2020-08-06T13:30:38","modified_gmt":"2020-08-06T11:30:38","slug":"dovodni-tunel-za-he-dabar-izvrsen-proboj-izmedju-napadnih-mjesta-3-i-4","status":"publish","type":"post","link":"https:\/\/integral.ba\/en\/dovodni-tunel-za-he-dabar-izvrsen-proboj-izmedju-napadnih-mjesta-3-i-4\/","title":{"rendered":"Headrace tunnel for HPP Dabar: Breakthrough between the excavation points 3 and 4 achieved"},"content":{"rendered":"\n

On Sunday, July 26, 2020 at 10 a.m., a breakthrough was achieved between the excavation points NM3 and NM4<\/strong>. This, in engineering terms, very important event, marked the physical connection of tunnel pipe excavated from the direction of the access tunnel \u201cStra\u017eevica\u201d in the total length of l=3,995.5 m with the tunnel pipe excavated from the direction of \u201cVodostan\u201d in the total length of l=3,857.0 m.<\/p>\n\n\n\n

The length of the excavated tunnel pipe downstream from the access tunnel \u201cStra\u017eevica\u201d is l=7,852.5 m, and upstream it is l=2,282.0 m, which makes the total continuous excavated length of the tunnel pipe of l=10,134.5 m.<\/p>\n\n\n\n

The excavation of a tunnel pipe of such a significant length is a construction accomplishment worth of attention and respect in a broader sense. In order to achieve that, the works were performed simultaneously at four excavation points, in two and three shifts, with daily engagement of up to 250 workers and specialized construction machinery. The condition of the excavation according to the excavation points (NM) on July 26, 2020 is as follows:<\/strong><\/p>\n\n\n\n