Stability detection method for accumulative slope model induced by intermittent rainfall

Abstract

The invention discloses an intermittent-rainfall-induced accumulation-type slope landslide monitoring model and a stability detection method. The monitoring device comprises a slope model, an artificial rain-making device, an image acquisition device, a data processing terminal and a plurality of different-emitting-color LED assemblies. The artificial rain-making device is arranged above a slope; the LED assemblies serve as feature points and are fixedly arranged onto the slope surface; the image acquisition device sends collected image data of the LED assemblies to the data processing terminal; and the data processing terminal processes the image data to obtain a digitalized slope hook surface of the slope. The monitoring model can carry out monitoring on intermittent-rainfall-induced slope model surface displacement; slope model surface displacement monitoring precision is high; data acquisition can be done conveniently and quickly; structure is simple; device cost is low; economical and efficient effects are achieved; and an accurate stability detection result is obtained.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method for detecting the stability of an intermittent rainfall-induced accumulation type slope model. Background technique [0002] my country is a country with frequent landslide disasters. According to statistics, there are 30×10 new and old landslides in our country. 4 , where catastrophic about 1.5×10 4 The annual loss is as high as more than 10 billion; rainfall is the main inducing factor of accumulation landslide instability. "China Geological Hazard Database" records the landslide disasters that occurred in my country from 1949 to 1995, and 68.5% of the landslides were caused by rainfall. The book "Chinese Typical Landslides" lists more than 90 examples of landslides, among which more than 95% of landslides are closely related to rainfall. [0003] The instability and failure of rainfall-induced accumulation landslides has always attracted much attention, and extensive...

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Problems solved by technology

However, the statistical results show that the occurrence of landslides is often not an inducement, but is closely related to the previous rainfall. Studying the instability and failure process of accumulation landslides and their gradual laws under the cumulative effect of intermittent rainfall can not only enrich and improve the current situation. Some theoretical systems of rainfall-induced landslides have very important practical significance, and during intermittent rainfall, the surface displacement of the slope has certain regular changes; predicting the stability of the slope based on the interval time of intermittent rainfall and the amount of rainfall data has a great impact on It is very important to ensure the safety of accumulation-type slopes. It can more clearly evaluate the stability changes of accumulation-type landslides under long-term natural conditions, improve the regional risk control level of geological disasters, and provide a scientific theoretical basis for disaster prevention and mitigation of accumulation-type landslide instability; In the prior art, the slope model is generally used to study the accumulation sliding instability, the variable is controllable, and the research is convenient; however, when monitoring the displacement change of the slope model surface, the monitoring device used is complex in structure, and there are many data acquisition devices and data Incomplete and inaccurate, resulting in high research costs, low data accuracy and low efficiency, and inaccurate stability testing

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