Actual measurement device and method of ultrahigh earth-rock dam internal 3D deformation

Abstract

The invention discloses an actual measurement device and method of ultrahigh earth-rock dam internal 3D deformation. Multi-edged stainless steel plate is buried in some parts that need to be monitored in internal dam, and a vector line body is anchored in the center of the stainless steel plate. The downstream of the line body monitoring facility installs in a wedge-shaped sectional view room inserted in the downstream surface of the dam. A GNSS receiving antenna is installed in the roof and a two-axis inclinometer is installed in four corners of baseboard to acquire 6D shift of the house. The upper wall of the house is reserved for the wide seam for introducing the vector line body that tensions by a fixed pulley and a weight. The angle is measured by the line body orientation measurement device. The line body axial elongation is measured by coaxial swirling potentiometer type displacement meter in a fixed pulley and axial distribution temperature correction is considered. The internal dam 3D deformation can be gained by combining a sensor measurement value and a level-3 coordinate. The device and method has the advantages of high measurement accuracy, good stability and high reliability.

Description

technical field [0001] The invention belongs to the technical field of hydropower engineering, and in particular relates to a device and method for actually measuring three-dimensional deformation inside a superhigh earth-rockfill dam. Background technique [0002] The internal deformation of ultra-high earth-rockfill dams during the construction period, initial storage period and initial operation period is relatively large, especially the settlement deformation. The existing internal deformation monitoring method separates vertical displacement and horizontal displacement monitoring, and uses water pipe settlement instruments and tension lines respectively. It ignores the coupling between horizontal displacement and vertical displacement, and directly takes the extension and contraction of the tension line horizontal displacement meter axis direction as the horizontal displacement of the upstream and downstream directions of the measuring point, and the approximation error ...

AI Technical Summary

Problems solved by technology

[0002] The internal deformation of ultra-high earth-rockfill dams during the construction period, initial storage period and initial operation period is relatively large, especially the settlement deformation. The existing internal deformation monitoring method separates vertical displacement and horizontal displacement monitoring, and uses water pipe settlement instruments and tension lines respectively. It ignores the coupling between horizontal displacement and vertical displacement, and directly takes the extension and contraction of the tension line horizontal displacement meter axis direction as the horizontal displacement of the upstream and downstream directions of the measuring point, and the approximation error is large, especially for super high Internal Large Deformation of Earth-rock Dam

In fact, the settlement deformation of the measuring point will cause the line body direction of the tension-type horizontal displacement meter buried inside the dam body to change, and it is impossible to always point horizontally to the downstream direction

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