Typhoon rainstorm type shallow landslide safety coefficient calculation method

Abstract

The invention discloses a typhoon rainstorm type shallow landslide safety coefficient calculation method. The typhoon rainstorm type shallow landslide safety coefficient calculation method includes A, acquiring calculation parameters of landslide by means of exploration report data collection or investigation and tests; B, acquiring typhoon wind scale, rainfall intensity and duration parameters according to weather forecast; C, determining average distances between trees and calculating cracking depths of slopes; D, calculating infiltration magnification coefficients of the slopes; E, calculating safety coefficients of the typhoon rainstorm type shallow landslide. The typhoon rainstorm type shallow landslide safety coefficient calculation method has the advantages that influence of typhoon wind load is taken into consideration when the safety coefficients of the typhoon rainstorm type shallow landslide are calculated, so that the typhoon rainstorm type landslide can be realistically evaluated, and the typhoon rainstorm type shallow landslide safety coefficient calculation method is quite practical.

Description

technical field [0001] The invention relates to a method for calculating the safety factor of typhoon-storm type shallow landslides. Background technique [0002] There are many typhoons landing in the southeastern coastal areas of my country every year, and typhoons and heavy rains induce a large number of geological disasters. After a typhoon lands, most of the slopes within its influence area are affected by the typhoon wind load and rainstorm at the same time, and the typhoon wind level usually reaches more than ten levels, so the wind load is a non-negligible factor for landslide instability. The vegetation in the southeastern coastal area is dense, and the wind load acts on the vegetation. The violent swaying of the trees will loosen the roots, causing the surface of the slope to loosen or crack. The generation of cracks increases the vertical channels for precipitation infiltration. The contribution of infiltration is not large, but the typhoon rainstorm has a strong...

AI Technical Summary

Problems solved by technology

At present, in the calculation of the safety factor of shallow landslides caused by typhoons and storms, only the slope instability caused by rainwater infiltration under the action of torrential rains is considered, and the impact of typhoons on rainfall infiltration is not considered.

[0005] Shortcomings of the prior art: (1) there is no calculation method for safety factor of typhoon storm type shallow landslide considering wind load at present; (2) typhoon storm type landslide disaster does not consider the impact of typhoon wind load on slope seepage and stability, The predicted results obtained do not match the actual

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