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A Method for Assessing the Impact of Earthquake on Slope Stability and Safety

A technology of safety impact and slope, applied in the fields of instrumentation, calculation, electrical digital data processing, etc., can solve the problem of lack of evaluation methods for the second impact

Active Publication Date: 2019-03-15
HUANENG LANCANG RIVER HYDROPOWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the evaluation of the first impact is not yet mature, and there is still a lack of effective evaluation methods for the second impact

Method used

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  • A Method for Assessing the Impact of Earthquake on Slope Stability and Safety

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Embodiment Construction

[0012] like figure 1 As shown, this method of assessing the impact of earthquakes on slope stability and safety includes the following steps:

[0013] (1) Using the ideal elastic-plastic model of rock and soil and the earthquake time-history finite element method, carry out seismic dynamic calculations on slope structures including dam slopes, and obtain the plastic strain area of ​​the slope;

[0014] (2) For the plastic strain zone, the parameters after the earthquake damage are used to calculate the seepage field and stress field of the slope, and analyze the slope when the induced conditions of rainfall, reservoir water level change, and slope excavation occur after the earthquake the stability of structures;

[0015] (3) Compare the result of step (2) with the result obtained without considering the earthquake action, and the difference obtained is regarded as the impact of the earthquake on the stability and safety of the slope.

[0016] The present invention evaluates...

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Abstract

The invention discloses a method for evaluating the influence of the earthquake on the stability and the safety of a side slope. The method can be used for analyzing the stability and the safety of a side slope during and after an earthquake. The method for evaluating the influence of the earthquake on the stability and the safety of the side slope comprises the steps of (1), calculating the earthquake dynamic effect on a side slope structure containing a dam slope based on an ideal elastoplastic model of the rock and earth mass and the finite element method of the earthquake time process to obtain a plastic strain region of the side slope; (2) for the obtained plastic strain region, calculating the seepage field and the stress field of the side slope based on earthquake post-injury parameters, analyzing and analyzing the stability of the side slope structure during the variation of the side slope in rainfall, reservoir water level, slope excavation and other induced conditions after the earthquake; (3), comparing the result of the step (2) with that irrespective of the earthquake effect to obtain the influence of the earthquake on the stability and the safety of the side slope.

Description

technical field [0001] The invention belongs to the technical field of dams, foundation pits, underground caverns and slopes in civil engineering, geotechnical engineering, water conservancy and hydropower and traffic engineering, and specifically relates to a method for evaluating the impact of earthquakes on the stability and safety of slopes. The stability and safety of the slope are analyzed under and after the earthquake. Background technique [0002] When seismic waves propagate to structures with free surfaces such as dams, foundation pits, natural or artificial slopes, seismic forces will be generated in these structures, which may cause damage to structures and even lead to instability of structures or slopes. [0003] The adverse effects of earthquakes on the stability of structures or slopes can be divided into two parts: (1) the seismic action during the earthquake directly leads to the instability of structures or slopes; (2) the seismic action causes damage to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 吴梦喜范福平周建程鹏达杨家修湛正刚卢吉李晓彬
Owner HUANENG LANCANG RIVER HYDROPOWER
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