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Method for determining correction coefficient of horizontal seismic action

A technology of correction coefficient and determination method, applied in the field of determination of correction coefficient of horizontal seismic action, can solve problems such as conservativeness, and achieve the effect of simple calculation

Active Publication Date: 2022-04-19
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Application Information

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Problems solved by technology

When the height of the slope is small, the correction factor η of horizontal earthquake action is 0.25, which is basically suitable; but when the height of the slope is large, the correction factor η of horizontal earthquake action is 0.25, which is too large and conservative

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  • Method for determining correction coefficient of horizontal seismic action
  • Method for determining correction coefficient of horizontal seismic action
  • Method for determining correction coefficient of horizontal seismic action

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Embodiment

[0029] Taking a high and steep slope in Southwest China as the research object, such as figure 1 shown. According to the geological survey, the survey area belongs to low-middle-mountain landform of structural denudation, with large terrain undulations, the bedrock is sandstone interbedded with mudstone, and the natural density is 2300kg / m 3 , the internal friction angle is 40°, the overlying rock is gravel soil, and the natural density is 2200kg / m 3 , the internal friction angle is 40°, and the height difference is 38m. According to the "Peak Earthquake Acceleration Zoning Map of China"

[0030] (GB18306-2001), the peak acceleration of ground motion in the survey area is 0.15g, and the characteristic period is 0.4s.

[0031] ① Obtain the basic geological information of the slope to be studied according to the geological survey results:

[0032] Slope height H = 38m;

[0033] Seismic wave equivalent frequency f=1 / 0.4=2.5Hz;

[0034] Slope density ρ=2200kg / m 3 ;

[0035...

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Abstract

The invention relates to a method for determining a horizontal seismic action correction coefficient, which enables the horizontal seismic action correction coefficient to be more practical and is simple and convenient to calculate. Comprising the following steps: (1) acquiring basic geological information of a slope to be researched according to a geological exploration result, including slope height H, slope body density rho, slope body elasticity modulus E, slope body poisson ratio v and seismic wave equivalent frequency f; (2) calculating the correction coefficient eta of the horizontal seismic action according to the following formula; and (3) if the calculated correction coefficient eta of the horizontal seismic action is less than 0.1, taking the eta as 0.1.

Description

technical field [0001] The invention relates to the anti-seismic design of slope engineering, in particular to a method for determining the correction coefficient of horizontal earthquake action. Background technique [0002] At present, there are mainly quasi-static method and dynamic time-history method to calculate the safety factor of slope stability under earthquake. The pseudo-static method is a simplified method commonly used in the aseismic design of slopes. This method follows the basic idea of ​​slope static stability analysis, and the instantaneous action of the earthquake is equivalent to a horizontal direction, which is applied to the center of gravity of the potentially unstable slide. direction. According to the limit equilibrium theory, the quasi-static safety factor of the sliding body can be determined by solving the static force balance or moment balance equation of the potentially unstable sliding body. . According to the "Code for Seismic Design of R...

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Application Information

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IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 王智猛张东卿薛元王海波刘菀茹肖朝乾李安洪姚裕春李国栋李志付正道
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD