Statistics-based method for calculating collapse accumulation volume of meizoseismal area

Abstract

The invention discloses a method for calculating the volume of avalanche accumulation in a strong earthquake area based on a statistical method. The method adopts methods such as investigation, measurement and statistics of avalanche accumulation in the Wenchuan earthquake area, and through correlation coefficient, success rate curve, sample inspection, etc. method to determine the area of ​​collapsed deposits in the earthquake zone A _B , put the obtained parameters into the calculation formula for determining the average thickness of the collapse accumulation body and the collapse accumulation body in the earthquake area, and the average thickness h of the accumulation body of the collapse accumulation body can be obtained _B and the collapse heap volume V _B Predictive value. This method is applicable to the accumulation volume and average accumulation thickness prediction of collapse accumulation bodies in the Wenchuan earthquake area. Compared with the prior art, the present invention combines the field investigation and statistical analysis of a large number of collapse accumulation bodies in the Wenchuan earthquake area, and the accumulation area of ​​the collapse accumulation bodies Converting to the accumulation volume and average thickness of the accumulation body can more accurately obtain the characteristic value of the collapse accumulation body in the Wenchuan earthquake area, and provide a basis for the prevention and control of the collapse accumulation body in the earthquake area and the prediction of the source volume of the debris flow. Its application is simple and efficient. It can meet the needs of geological disaster prevention.

Description

technical field [0001] The invention belongs to the technical field of engineering design and application of collapse accumulation bodies and debris flow prevention, and in particular relates to a method for calculating the volume of collapse accumulation in a strong earthquake area based on a statistical method. Background technique [0002] Due to the earthquake action, the slope structure became more fragmented, and the scale of loose material in the slope increased sharply in the earthquake area, which led to a sudden increase in the scale of collapse, an increase in the frequency of outbreaks, a significant increase in the possibility of outbreaks, and a decrease in the threshold conditions for outbreaks. During the "5.12" Wenchuan earthquake, a large number of disasters such as collapses and landslides occurred in the earthquake area. Among them, collapse disasters buried bridges, damaged piers, buried tunnel openings, blocked roadbeds, smashed road surfaces, smashed re...

AI Technical Summary

Problems solved by technology

The debris flow source of the collapsed accumulation body in the earthquake area is mainly obtained through field investigation and measurement. The work is difficult, high-risk, and heavy workload, which makes the accuracy and time of debris flow source investigation unable to meet the rapid identification and prevention of debris flow. The source volume of the debris flow obtained is relatively small relative to its actual value, which cannot meet the needs of the engineering design of debris flow prevention in the earthquake area

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