Underwater survey of the bed (with the help of divers)

Table of Contents

Underwater survey of the bearing

In the Republic of Latvia and the Baltic States, we conduct underwater surveys of the bed with the help of divers at various facilities. In Latvia, we have participated in the underwater survey of the bed in the territory of the city of Riga and the port of Riga, the strengthening of the Mūkusala street embankment and the construction of the related infrastructure.

The clients of our company's underwater technical works and various divers' works are the largest Latvian ports - Liepājas port, Ventspils port, Riga port, Salacgrivas port, Skulte port, Rojas port. Latvian companies for whom we have carried out underwater diver work - Latvian Hydrographic Service, Latvian Maritime Administration, Latvian Finieris, Latvian National Library, Riga Freeport Authority.

Underwater diving works — Activities of underwater divers in Ventspils port

Survey of underwater (technical works by divers) pipelines

Pipes of various diameters stretched across the Daugava, Buļļupei, Jugla and other rivers for the water supply and sewerage needs of Riga water (underwaters 2xDN1400mm, 2xDN 800mm)
Our divers inspect pipelines and assess their condition, look for leaks
Divers draw up an opinion on the condition of underwater pipelines
Divers perform video recording of the object and provide video footage to the client

The team of Dronelab SIA, in the works of strengthening the propellers, Mangaļsala pier — Dronelab SIA team of divers, in the works of strengthening the propellers, Mangaļsala pier

We carry out these engineering works in pipe surveying under water

Take the existing ones pipes height measurements of inlets and outlets;
Take the existing ones pipes diameter check - comparison;
Take the existing ones pipes (wheel) displacement tests along its entire length.

Bridge inspections and large culverts require an underwater inspection

Latvian State Roads Bridge inspection auctions result in underwater bed and structure survey works, which are regularly carried out by the divers of SIA "Dronelab".
The underwater part is exposed to water and ice and inspections are regular
In the underwater part of the bridge structures, no significant damage was found in the lower part of the bridge, which is partially below the water level (-20 cm). No damage was found in the retaining walls of the bridge bank.
Damage was found in the wings of the end walls, however, their overall condition was subject to survey
was good at the time. Bridge structures and supports were not cracked or settled, metal
the bars are not exposed.

Survey of the underwater part for the bridge

Recommendations for concreting the underwater part

1) Use u60 concrete or normal with high aluminum content and glass fiber.
2) Use (10mm anchor bolts along the edge, 20cm each) to secure the ducts
3) Use a concreting pipe with a shutter if the vents are hermetically sealed. And when the slats are closed, a +/- smooth wall is formed
4) Secure the guides as tightly as possible, using sealing rubbers
5) Clean the wall and damage from mud and impurities
6) If there is sea water, it must be taken into account that the mixing of the concrete with it reduces the strength of the concrete