Magnetic positioning based online monitoring method of achieving of landslide deep layer displacement measurement

Abstract

Disclosed is a magnetic positioning based online monitoring method of achieving of landslide deep layer displacement measurement. One permanent magnet and two or more magnetic detectors constitute a local node monitoring system, and a plurality of nodes are distributed on a landslide body to form an overall landslide monitoring network; in the local node monitoring system, the permanent magnet is fixed to a landslide body stabilizing layer, the magnetic detectors are placed on a landslide layer of the landslide body, after magnetic signals detected by the magnetic detectors are sent back to a monitoring center, the space positions of the magnetic detectors are worked out through a magnetic positioning algorithm, when a landslide happens, the space orientations and space positions of the magnetic detectors will change, the space positions of the magnetic detectors are determined through the same algorithm after the landslide happens, landslide deep layer displacements of the local nodes can be worked out through coordinate transformation, and landslide deep layer displacement data obtained through the monitoring network composed of the local monitoring nodes can be synthesized to assess landslide body deep layer landslide situations.

Description

technical field [0001] The invention provides an online monitoring method based on magnetic positioning to realize the displacement measurement of the deep layer of the landslide. Background technique: [0002] Landslides are geological disasters that often occur in hilly and mountainous areas, and account for the largest proportion of geological disasters in my country every year. In order to reduce the damage and loss caused by landslide geological disasters, three measures can be adopted to deal with landslide geological disasters: engineering protection, monitoring and early warning, or relocation and avoidance. Among them, monitoring and early warning is a semi-active preventive disaster reduction measure that is more commonly used. The main monitoring quantity of landslide disaster body is displacement, including the surface displacement of landslide body and the deep displacement of landslide body sliding along the sliding zone. The main technical means used for the d...

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Problems solved by technology

[0003] The specific method of drilling inclinometers is to drill down from the surface of the landslide to several meters below the sliding surface, install an inclinometer pipe with a chute, and the external grouting of the inclinometer pipe is firmly combined with the landslide body. Measure the inclination change of the inclinometer tube in the section, and consider that the part below the sliding surface does not move when calculating, and use it as the base point for displacement calculation. The position of the inclinometer tube will be broken due to the dislocation of the upper and lower rock masses, so the calculation base point of the deep displacement will be invalid, and the entire inclinometer hole will be abandoned

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