Calculation method for elastic modulus of buffer layer

A technology of elastic modulus and calculation method, applied in the field of collapse and rockfall prevention and control engineering, can solve the problems of poor disaster prevention and mitigation applicability, unsuitable for coarse rock buffer layers, etc., achieving good practical application significance, accurate and reliable calculation results, high The effect of disaster prevention suitability

Active Publication Date: 2018-12-14
FUJIAN GEOLOGICAL ENG SURVEY INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the impact of the specific particle size of tight sandstone reservoir rocks on the elastic modulus is not considered, its calculation method is not suitable for the actual calculation of large-scale buffer layers of coarse rocks in the field. Poor applicability

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  • Calculation method for elastic modulus of buffer layer

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The method for calculating the modulus of elasticity of the buffer layer comprises the following steps:

[0037] a. Calculate and obtain the particle characteristic parameters of the soil-rock buffer layer, including the soil-rock median particle size D, the soil-rock particle unevenness coefficient Cu and the soil-rock buffer layer compactness S. The soil-rock median particle size D refers to the particles with a weight percentage of 50% of the soil-rock particles Particle size, in mm; soil and rock particle unevenness coefficient Cu is calculated by formula 1;

[0038] Cu=D 60 / D 10 Formula 1

[0039] In the formula, D 60 is the particle size of 60% by weight of soil and rock particles, in mm; D 10 It is the particle size of 10% by weight of soil and rock particles, in mm;

[0040] b. Determine the type of soil and rock according to the median particle size D of the soil and rock, and calculate the elastic modulus M of the soil and rock;

[0041] When the media...

Embodiment 2

[0050] The method for calculating the modulus of elasticity of the buffer layer comprises the following steps:

[0051] a. Calculate and obtain the particle characteristic parameters of the soil-rock buffer layer, including the soil-rock median particle size D, the soil-rock particle unevenness coefficient Cu and the soil-rock buffer layer compactness S. The soil-rock median particle size D refers to the particles with a weight percentage of 50% of the soil-rock particles Particle size, in mm; soil and rock particle unevenness coefficient Cu is calculated by formula 1;

[0052] Cu=D 60 / D 10 Formula 1

[0053] In the formula, D 60 is the particle size of 60% by weight of soil and rock particles, in mm; D 10 It is the particle size of 10% by weight of soil and rock particles, in mm;

[0054] b. Determine the type of soil and rock according to the median particle size D of the soil and rock, and calculate the elastic modulus M of the soil and rock;

[0055] When the media...

Embodiment 3

[0066] The method for calculating the modulus of elasticity of the buffer layer comprises the following steps:

[0067] a. Calculate and obtain the particle characteristic parameters of the soil-rock buffer layer, including the soil-rock median particle size D, the soil-rock particle unevenness coefficient Cu and the soil-rock buffer layer compactness S. The soil-rock median particle size D refers to the particles with a weight percentage of 50% of the soil-rock particles Particle size, in mm; soil and rock particle unevenness coefficient Cu is calculated by formula 1;

[0068] Cu=D 60 / D 10 Formula 1

[0069] In the formula, D 60 is the particle size of 60% by weight of soil and rock particles, in mm; D 10 It is the particle size of 10% by weight of soil and rock particles, in mm;

[0070] b. Determine the type of soil and rock according to the median particle size D of the soil and rock, and calculate the elastic modulus M of the soil and rock;

[0071] When the media...

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Abstract

The invention discloses a calculation method for elastic modulus of a buffer layer. The calculation method is characterized by comprising the following steps: a, earth-rock buffer layer particle characteristic parameters, including earth-rock median diameter D, earth-rock particle nonuniform coefficient Cu and earth-rock buffer layer compactness S, are obtained by calculation, wherein the earth-rock median diameter D refers to particle diameter with weight percentage of 50% in the earth-rock particles, and the unit is mm; the earth-rock particle nonuniform coefficient Cu is calculated by Formula 1; b, the earth-rock type is determined according to the earth-rock median diameter D, and the earth-rock elastic modulus M is calculated. The influence of the specific particle size value of earth-rock on the elastic modulus is fully considered, the calculation method is suitable for actual large-scale calculation of large thick stone buffer layers in the field, the calculation result is accurate and reliable, and the method has higher disaster prevention applicability for preventing and reducing disaster such as collapse and rockfall.

Description

technical field [0001] The invention relates to the field of collapse and rockfall prevention engineering, in particular to a method for calculating the elastic modulus of a buffer layer. Background technique [0002] Collapse and rockfall are natural phenomena that occur in mountainous areas or on road slopes. After landslides and rockfalls occur, huge rocks roll down the hillside or the roadside, causing great damage to nearby residential buildings, factories and other construction facilities, or roads. In order to reduce the influence of the impact force, it is an economical and effective measure to take effective protection of earth-rock buffer layer. The most economical and applicable buffer layer is composed of stones, sand, soil and other materials, and is composed of one or more of them. Therefore, the particle size of different soil-rock buffer layers has different buffering effects, and the buffering effect can be determined by the buffering effect. The elastic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 余斌柳侃赵怀宝黄瑛瑛罗旋郭云峰张智超陈志超
Owner FUJIAN GEOLOGICAL ENG SURVEY INST
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