Deep displacement monitoring device and method

Abstract

The invention discloses a deep displacement monitoring device and method for side slope and foundation pit engineering. The deep displacement monitoring device comprises an inclinometer tube and a probe, wherein the probe is provided with guide wheels, a guide groove is formed in an inner wall of the inclinometer tube, the guide wheels are matched with the guide groove, the guide wheels upwards and downwards move in the inclinometer tube along the guide groove, the deep displacement monitoring device also comprise an angle measurement meter, the angle measurement meter is used for measuring anangle generated by twisting the inclinometer tube along a horizontal direction of an axis of the inclinometer tube during the monitoring process, the angle measurement meter is a compass device, andthe compass device and the probe twist at the same angle around the axis of the inclinometer tube. By acquiring a horizontal twist angle of the inclinometer tube, horizontal displacement of a slope body under horizontal twisting of the inclinometer tube is corrected to obtain a horizontal displacement correction value. By the deep displacement monitoring device, the influence on deep side slope and foundation pit inclinometry monitoring data accuracy caused by disconnection and twisting generated by the inclinometer tube under relatively large gravity of a surrounding soil layer is eliminated,a monitoring error is reduced, the monitoring data is timely corrected, and more accurate and timely data is provided for horizontal displacement monitoring of a side slope and a foundation pit.

Description

technical field [0001] The invention belongs to the field of horizontal displacement monitoring of slope and foundation pit engineering, and in particular relates to a deep displacement monitoring device and method suitable for deep landslide horizontal displacement detection and error correction. Background technique [0002] As we all know, in slope and foundation pit engineering, the deep deformation law of slope is an important index for evaluating slope stability. At present, the horizontal displacement monitoring of slopes and foundation pits can be generally divided into surface observation and deep observation. The latter is carried out by drilling vertical holes on the slope and installing inclinometers. The feedback accuracy is high, and it is also the most common and reliable choice. [0003] However, when monitoring the deep displacement of slopes and foundation pits, especially in the process of measuring the inclination of deep and extremely deep landslides, d...

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Problems solved by technology

[0003] However, when monitoring the deep displacement of slopes and foundation pits, especially in the process of measuring the inclination of deep and extremely deep landslides, due to the deep position, the inclinometer tube is prone to disjoint and jamming under the heavy gravity of the surrounding soil layer. Cause torsion, due to the torsion of the inclinometer tube, it will affect the accuracy of the monitoring data of the deep landslide inclinometer based on the measurement of the inner wall of the inclinometer tube. Inaccurate monitoring data will lead to inaccurate engineering monitoring data and false alarms in early warning , if the early warning is advanced, the construction will be affected, and if the early warning is delayed, there is not enough time to prevent the occurrence of engineering hazards

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