Core wall deformation monitoring method for high rock-fill dam

Abstract

The invention discloses a core wall deformation monitoring method for a high rockfill dam. The method comprises the following steps: arranging an array robot, arranging a measurement carrier, pre-burying an inclinometer tube, designing a core part, performing measuring, solving an MEMS inertial navigation error equation, calculating an inclination angle of a corresponding shaft, and calculating anaccumulated displacement according to an angle reckoning displacement amount and an integral. According to the principle of high-precision MEMS inertial navigation, the array type robot measurement system is researched and developed, the horizontal and vertical displacement of the core wall is monitored through deformation of the array type robot, the horizontal displacement is monitored in a vertical burying mode, the vertical displacement is monitored in a transverse burying mode, automatic observation is achieved, manual observation is completely replaced, the observation precision is high, the automation degree is high, the equipment diameter is small, the system is capable of adapting to large deformation of a core wall, capable of being buried transversely and vertically, and capable of making up for the inconvenience of vertical burying of the pipeline robot measuring system.

Description

technical field [0001] The invention relates to the technical field of deformation monitoring, in particular to a method for monitoring deformation of a core wall of a high rockfill dam. Background technique [0002] The horizontal displacement and settlement of the central wall of large rockfill dams are the focus of the researchers. The traditional horizontal displacement is monitored by the movable inclinometer equipped with the inclinometer tube, and the angle and distance are measured to convert it into horizontal displacement. It is very suitable when the height of the dam body is not high, and it is also the method recommended in the code. However, when the height of the dam exceeds 300m, it will take a long time to manually pull the inclinometer cable, resulting in a long measurement time, and it is easy to cause human error to cause the inclinometer probe. Sliding, when a large deformation occurs, the inclinometer tube is easy to break and the probe cannot continue ...

AI Technical Summary

Problems solved by technology

[0002] The horizontal displacement and settlement of the central wall of large rockfill dams are the focus of the researchers. The traditional horizontal displacement is monitored by the movable inclinometer equipped with the inclinometer tube, and the angle and distance are measured to convert it into horizontal displacement. It is very suitable when the height of the dam body is not high, and it is also the method recommended in the code. However, when the height of the dam exceeds 300m, it will take a long time to manually pull the inclinometer cable, resulting in a long measurement time, and it is easy to cause human error to cause the inclinometer probe. Sliding, when a large deformation occurs, the inclinometer tube is easy to break and the probe cannot continue to complete the measurement task;

[0003] The sensor used in traditional settlement monitoring is an electromagnetic settlement ring, which is similar to the inclinometer for manual observation. Beware that the height of the wall exceeds 300m, the manual measurement time is long, the error is large, and there is a danger of the instrument slipping. Some researchers use distributed The optical fiber is used to monitor the vertical displacement, and the displacement is converted by monitoring the distribution of internal stress. This method relies on the protection of the optical fiber. When the deformation is large, the optical fiber is easy to break and cause the sensor to fail. At the same time, this method monitors the stress. Directly measure the displacement, the measurement results are not very intuitive, and when the data is converted into displacement, the error is large and cannot match the displacement measurement result;

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