Spatiotemporal dynamic evaluation method for soil slope safety state under rainfall condition

Abstract

The invention relates to a spatiotemporal dynamic evaluation method for the soil slope safety state under the rainfall condition. The method comprises the following steps that firstly, a side slope body is sampled, and osmotic coefficient, suction force and a rheological model of a soil body are obtained; secondly, the maximum potential damage trend surface of the slope under the rainfall condition is determined; thirdly, a monitoring point is set, and real-time rainfall work condition data are obtained; fourthly, real-time displacement and transformation data of the monitoring point are obtained; fifthly, calculation parameters of a long-term rheological model of the slope under the rainfall and dry-wet circulation function are obtained; sixthly, the safety coefficient of the soil slope under the real-time rainfall work condition is calculated; and seventhly, the dynamic evaluation is carried out on the safety state of the soil slope under the rainfall condition. Compared with the prior art, the problem of the temporal and spatial variation of a research object is taken into consideration, the precision and reliability degree of the spatiotemporal dynamic evaluation on the safety state of the soil slope under the rainfall condition are improved, and the beneficial effects that more reasonable quantification is achieved, and early warning and forecasting are more convenient are achieved.

Description

Technical field [0001] The invention relates to a dynamic evaluation method of slope safety, in particular to a time-space dynamic evaluation method of the safety behavior of a soil slope under rainfall conditions. Background technique [0002] China is one of the countries with the worst landslides in the world. During the six years from 2006 to 2011, 157,927 landslides occurred nationwide. In recent years, China’s annual economic losses caused by landslide disasters have been over US$1 billion. In 2009, there were only 16 extra-large and large-scale landslide disasters in the country, with direct economic losses reaching 190 million yuan; in 2011, 7 major landslide disasters with more than 10 people dead or missing or direct economic losses of more than 100 million yuan occurred. The loss was 599 million yuan. Landslide disasters not only cause huge economic losses, but also seriously endanger people's lives. Soil landslides under rainfall conditions are the most widely dis...

AI Technical Summary

Problems solved by technology

However, most of these research results at home and abroad belong to static evaluation methods, which cannot really consider the temporal and spatial changes of the research objects, that is, cannot truly realize the temporal and spatial dynamic evaluation of slope hazards.

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