Geophysical method and device for landslide hydrogeological monitoring

Abstract

The invention provides a geophysical method and device for landslide hydrologic condition monitoring, and belongs to the field of geological disaster monitoring. The device comprises a landslide surface potential monitoring device, a landslide drilling potential monitoring device, a control and measurement terminal, a geoelectric field power supply control power source, a long electrode and a short electrode thereof. The long electrode sequentially penetrates a sliding body, a sliding zone and a sliding bed, and meanwhile the short electrode is arranged close to the earth surface long electrode. A geoelectric field power supply device is used to apply artificial electric fields for the long electrode and the short electrode. If hydrogeological condition changes of a weak zone, a weak intercalated layer, a weak argillation zone, and a shear movement structural surface of a landslide cause abnormality of an electric field, potential changes would be observed through the surface potentialmonitoring device and the landslide drilling potential monitoring device, so as to realize predict landslide deformation and a critical sliding state, and perform landslide hazard warning. Thus, occurrence of landslide geological disasters is effectively prevented. The method and the device has characteristics of low cost, simple implementation and continuous monitoring of 7x24 hours.

Description

technical field [0001] The invention relates to the field of landslide geological disaster monitoring, in particular to a geophysical method for hydrogeological conditions of landslides. Background technique [0002] Landslide refers to the natural phenomenon that the rock and soil mass on the slope loses its stability under the influence of natural or man-made factors, and slides down along the through failure surface or landslide belt as a whole. Landslides account for about 70% of the total number of geological disasters, seriously endangering national property and people. The purpose of landslide monitoring is to realize accurate prediction and forecast of landslides and reduce the harm caused by landslide disasters. [0003] Because the material composition, structure, porosity and water content of the weak body of the landslide are significantly different from those of the surrounding rock. Therefore, landslides have differences in various physical properties such as ...

AI Technical Summary

Problems solved by technology

Because water plays an important role in the process of landslide disasters, electrical prospecting is often used as the main effective means to effectively evaluate the hazards of landslides. The conventional direct current method mainly uses stainless steel or copper short electrodes for field measurement, but it is easy to use in engineering practice. Affected by terrain, grounding resistance, power supply size, etc., resulting in low signal-to-noise ratio, difficult to identify geological anomalies and other deficiencies

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