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Strain softening side slope dynamic stability assessing method

A dynamic stability and strain softening technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of less consideration of the dynamic progressive failure process of the slope, the safety factor is too large, and the calculation results are too small. To achieve the effect of good application development prospects, convenient calculation, and clear concept

Active Publication Date: 2015-12-16
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

When the peak strength of the soil stress index is used to calculate the slope stability, the calculation result is too small; when the residual strength is used to calculate the slope stability, the calculated safety factor is too large
At the same time, when using the slice method to analyze the slope stability, the dynamic progressive failure process of the slope is generally seldom considered, and only a single safety factor is obtained
Therefore, in the actual application process, the section method still has certain limitations.

Method used

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  • Strain softening side slope dynamic stability assessing method
  • Strain softening side slope dynamic stability assessing method
  • Strain softening side slope dynamic stability assessing method

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Embodiment Construction

[0031] The invention aims to provide a method for evaluating the dynamic stability of a strain-softening slope. The specific embodiments of the present invention will be described in detail below in conjunction with engineering examples and accompanying drawings.

[0032] Such as figure 1 As shown, the strain-softening slope dynamic stability evaluation method provided by the embodiment of the present invention includes the following steps:

[0033] Step 1: If figure 2 and image 3 As shown, the slope is 20m high and the slope angle is 45°. Soil parameters: weight is γ=18kN / m 3 , considering the strain softening characteristics of the soil, the friction angle The cohesion peak strength is c p =40kPa, the corresponding strain γ p =1×10 -3 , the cohesion residual strength is c γ =10kPa, the corresponding strain γ γ =3×10 -3 .

[0034] Step 2: Divide the slope sliding body into 32 strips from bottom to top, and every 2 soil strips are 1 soil block, 16 soil blocks in...

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Abstract

The present invention discloses a side slope dynamic stability assessing method based on a Swedish slice method and a simplified strain softening theory, and belongs to the technical field of geological engineering. The method comprises: dividing a side slope vertical bar into n soil blocks; using a strain of the soil block as a parameter; according to a simplified relationship between the strain and a stress, determining a value of the stress of the soil block; and based on the Swedish slice method, calculating stability of a side slope. According to the method provided by the present invention, a dynamic progressive breakage process of the side slope is considered, and according to the change of the strain of the soil block in the breakage process, information about a change in a safety factor in the breakage process of the side slope is determined. The method is simple in principle, convenient for calculation and applicable to dynamic stability analysis of a stain softening side slope.

Description

technical field [0001] The invention relates to an evaluation method for slope stability analysis, in particular to a strain softening type slope dynamic stability evaluation method, which belongs to the technical field of geological engineering. Background technique [0002] my country is a country with many mountainous areas, and landslides caused by unstable slopes will cause huge losses to people's safety and economic construction. Correctly evaluating the stability of the slope and taking corresponding reinforcement measures can reduce this loss to a large extent. When analyzing the stability of slopes, there are mainly two methods, the slice method and the finite element method. The slice method is still widely used because of its simple concept and high calculation efficiency. [0003] At present, when using the slice method to analyze the slope stability, the strain softening characteristics of the soil are generally not considered. When using the peak strength of ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 陈国庆赵聪李乐黄润秋
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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