Keyword: «sonar»

INSTRUMENTAL STUDY OF UNDERWATER PIPELINE CROSSINGS TAKING INTO ACCOUNT SEASONAL SHARPLY CONTINENTAL CLIMATIC FEATURES OF THE LENA BASIN

Authors:

Aleksandr Antonov,

Zoya Kornilova,

Aisen Tereshkin,

Urii Yakovlev

The article considers the instrumental survey methods and their peculiarities for underwater pipeline crossings (UPC) located in a sharply continental climate. The following instrumental survey methods are described: profile sounding using the OKO-2 GPR, examination of the Lena River bottom in the area of the underwater crossing of the main gas pipeline (MGP) using Hydra 500E side-scan sonar, determination of the actual planned-high-altitude position of the floodplain part of the underwater gas pipeline employing the RD-8000 line locator. It is shown that there is a practical set of equipment that makes it possible to perform planned and real-time monitoring of the state of the UPC almost all year round, despite the unfavorable climatic conditions and the extension of some UPCs in Central Yakutia.

Keywords: stress-strain state, gas pipeline, underwater crossing, line locator, ground penetrating radar, sonar, pipeline, siphon