Stabilisation of landslides within the Boruna neighbourghood, City of Lom

On the basis of the geological and hydrological report, an investment project was developed, which together with the spatial plans was financed by the Municipality of Lom. The project envisages the construction of a site: STABILISATION OF A PERIODICALLY ACTIVE LANDSLIDE WITH ID. NUMBER MON 24,44238,92,01 AND ITS CONSTITUENT PERIODICALLY ACTIVE LANDSLIDES WITH IDs MON 24,44238,92,01,01 and MON 24,44238,92,01.02 REGISTERED IN THE BORUNA NEIGHBOURHOOD, CITY OF LOM", including management activities such as preparation of public procurement documents, as well as supervision information and communication measures. The works are planned to reduce the groundwater level, as well as to build a retaining wall along the river bordering the neighborhood, with a height of 5.2 m and a length of 850 m, mounted on piles 1200, secured by anchors to the skate. The reduction of groundwater level in the body of the landslides is achieved via two drainage ribs. Drainage rib No. is 1 436 m long and 2 to 3,5 m deep, it starts over Perushtitsa Street and descends on the Danube river. Drainage rib No.2, is 885,48 m long and 2 m to 4 m deep, it starts over a landslide rash, runs along the bottom of an existing gully, and along "Gurgulyat" Str. discharges into the Danube. There are also 2 deep drainage shafts (wells) 6 meters in diameter, each equipped with 8 horizontal drainage drills (HDDs) extending to 70 metres each collecting the drainage water. The drainage waters collected in the shafts, are discharged via runoffs (ducts) into the Danube river and are made of metal pipes. Following the implementation of the works, the existing monitoring system (CMS) of the landslides will be expanded, by building 20 control benchmarks on the newly built retaining wall, a new reference observation point (ROP) as well as building 4 Inclinometres.

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