Time-frequency analysis method for seismic stability of high and steep slope

A time-frequency analysis, high and steep slope technology, applied in the field of geotechnical engineering, can solve the problems of taking into account the duration, frequency and distribution differences of difficult seismic waves at the same time, achieve automatic calculation and analysis, ensure comprehensiveness, and ensure analysis The effect of accuracy

Pending Publication Date: 2021-07-09
核工业西南勘察设计研究院有限公司
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a time-frequency analysis method for seismic stability of high and steep sl

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  • Time-frequency analysis method for seismic stability of high and steep slope
  • Time-frequency analysis method for seismic stability of high and steep slope
  • Time-frequency analysis method for seismic stability of high and steep slope

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] Such as figure 1 As shown, it is a flow chart of the time-frequency analysis method for seismic stability of high and steep slopes in the present invention.

[0020] The time-frequency analysis method of high and steep slope seismic stability of the present invention comprises the following steps:

[0021] S1. Obtain topographic data and geotechnical parameters of the target area, establish a corresponding geological analysis model, and perform grid processing on the structural surface of the sliding body in the geological analysis model.

[0022] Wherein, the geological analysis model includes the bedrock, the structure above the bedrock is the overburden, and the structure plane between the overburden and the bedrock is the sliding body structure.

[0023] Geomechanical parameters include bedrock density ρ 1 , P-wave velocity C in the bedrock p1 , S wave veloci...

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Abstract

The invention discloses a time-frequency analysis method for seismic stability of a high and steep slope, which comprises the following steps: acquiring topographic data and rock-soil mass mechanical parameters of a target area, establishing a corresponding geological analysis model, and carrying out gridding processing on a sliding mass structural surface in the geological analysis model; obtaining a design response spectrum curve of the target area, and determining a seismic oscillation acceleration time history curve of the target area; randomly selecting one point on the gridding slip mass structural surface, and calculating a seismic oscillation displacement time travel curve of the reflected wave and the transmitted wave at the point according to the seismic acceleration time travel curve; and calculating an intrinsic mode function and a frequency time-history curve corresponding to the seismic oscillation displacement time-history curve by using a Hilbert-Huang transform algorithm. The method can solve the problem that it is difficult to consider the duration, frequency and distribution difference of seismic waves at the same time in the prior art, and is comprehensive in covering influence factors, reliable in calculation and wide in application range.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a time-frequency analysis method for seismic stability of high and steep slopes. Background technique [0002] Seismic stability analysis of high and steep slopes is one of the important topics in geotechnical engineering. At present, quasi-static methods and numerical analysis methods are mainly used in the analysis of seismic stability of high and steep slopes at home and abroad. According to the post-disaster field investigation results of many typical earthquakes and the analysis results of the cause mechanism, it can be known that during the earthquake process, the elastic wave (P wave) whose vibration direction is consistent with the propagation direction has a great influence on the stability of the rock slope. However, P wave is a kind of complex non-stationary signal, and its frequency pattern is gradually adapted with time, which results in a relatively...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/30G01V1/306
Inventor 董云田华于丰泽张建经赵国华陈龙飞王成功
Owner 核工业西南勘察设计研究院有限公司
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