FIELD: engineering geodesy.
SUBSTANCE: invention relates to engineering geodesy and can be used for geotechnical/geodetic monitoring of aboveground/underground pipelines in hard-to-reach arctic areas. Method for determining deformations of pile supports of a pipeline using navigation satellite systems, characterized by that each ground reference point is connected by a geodetic polygon from one constellation of satellites, for which provision is made for simultaneous operation for at least 60 minutes of at least three ground-based geodetic global navigation satellite system (GNSS) receivers, which are installed above ground reference points, at that, with their simultaneous operation, the recording resolution is 15 seconds and the elevation angle mask is 10°, performing simultaneous static observations from 24 to 48 hours, for the observed lines up to 100 km or up to 200 km, respectively; on ground reference points located at distance of 20 to 40 km, wherein one stable initial point is included to enable transmission of spatial coordinates to the origin or centre of the frame of the high-altitude network, stability of initial point and points from ground reference points of static observations is determined by parameters X,Y,Z of observations from at least 5 near international points in geocentric coordinate system ITRF (International Terrestrial Reference Frame), determining coordinate referencing of high-altitude network frame, levelling the frame of the high-altitude base of the deformation geotechnical network using high-precision ephemeral-time information; determination of elevation marks of deformation marks of pile supports of the pipeline, for this purpose, on each ground reference point, a transmitting geodetic GNSS receiver with a radio modem is installed in series and fixing current corrections of coordinates and heights on each deformation mark of the pile support of the pipeline using another receiving geodesic GNSS receiver with a radio antenna – rover with an accuracy of not more than 20 mm; determination of deformations of pile supports of a pipeline by determination of changes in coordinates and heights of deformation marks.
EFFECT: increased accuracy of determining deformations of pile supports of pipeline from 20 to 200 km in hard-to-reach arctic areas without stable mobile communication due to creation of high-precision frame network and use of radio mode, as well as elimination of detected deformations, which allows to increase service life and efficiency of pipeline operation.
11 cl, 6 dwg
