Monitoring of hydrological condition of an area of high pressure gas pipeline, Pikalevo, Russia

Oktober 25, 2015

Field works.

Field works.

The area of high pressure pipeline near Pikalevo, Leningrad Region is characterized by high moisture saturation.
Features of natural terrain and seasonal raising of the groundwater level can lead to erosion of the substrate of the pipeline and create dangerous zones of tension. 

To study the distribution of moisture along the pipeline route and detect anomalous zones the GPR method was chosen as the fastest. We used GROT 12H with antennas 1 m, 2 m and 4 m, and a GPS receiver for geo-location information used to obtain coordinates of GPR measurement points.

GPS receiver

GPS receiver

As a result of studies, it was determined that the pipes lie along the route at different depths, substrate capacity differs in different sections of the track. In addition, the groundwater level was defined in different parts of the track and unevenly distributed along the route anomalous zones of flooding was found.

Fig. View of a work site in one of the sections of the pipeline.

Fig. View of a work site in one of the sections of the pipeline.

Fig. The three-dimensional distribution of moisture on a section at a depth corresponding to the position of pipes along the pipeline in one of the sectors of work    

Fig. The three-dimensional distribution of moisture on a section at a depth corresponding to the position of pipes along the pipeline in one of the sectors of work

 

During four days of work four selected for the monitoring During four days of work we studied in detail four selected for the monitoring sites of the high-pressure gas pipeline with a total length of more than 5 km.