A continuous monitoring method of surface deformation based on gnss

Abstract

The invention discloses a method for continuously monitoring surface deformation based on GNSS, including the following steps: S1, establishing a GNSS observation station; S2, obtaining the length deformation of an observation baseline; S3, calculating the strain components of the observation baseline; S4, calculating the average value of the strain components of the observation baseline; S5, calculating the strain parameters of an area to be monitored; S6, calculating the shear inclined strain parameters of the observation baseline; and S7, repeating S2 to S6, and continuously monitoring thearea to be monitored. The method is simple in structure and reasonable in design. The length deformation of the observation baseline is obtained by measuring the displacement of the GNSS observation station, and the strain parameters of the area to be monitored and the shear inclined strain parameters of each observation baseline are calculated according to the length deformation of the observation baseline, which provides effective reference for the accumulated change of the stress of the area to be monitored. The method is convenient to operate, has strong practicability and a good use effect, and is easy to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of deformation monitoring, and in particular relates to a GNSS-based continuous monitoring method for surface deformation. Background technique [0002] Deformation is a ubiquitous natural phenomenon in nature. It exists not only in the natural earth structure, but also in all human-engineered structures. It refers to the change process of the shape, size and position of the object in the time and space domain under the joint action of various factors and loads. Due to the universality of deformation, it is allowed within a certain range, but if it exceeds the allowable limit, it may cause secondary disasters of deformation, such as landslides, collapses, subsidence, dam failures, bridges and other buildings collapse. [0003] GNSS refers to the global satellite navigation system, which belongs to the positioning and navigation technology integrating multinational navigation satellite constellations, inclu...

AI Technical Summary

Problems solved by technology

The current problem is that no matter which data processing method is used, the obtained processing results are the time series of the position coordinates of the observation points

Although the obtained time series images can well reflect the real-time deformation process of the monitored object, the analysis of its deformation degree is only limited to a single evaluation of the continuity, stability, periodicity and other aspects of the time series curve.

However, the observed displacement of the surface cannot represent the strain or stress that is accumulating during the deformation of the monitoring body during the observation period.

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