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A Method for Evaluating the Dynamic Stability of Strain-softening Slopes

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: 2017-11-21
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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  • A Method for Evaluating the Dynamic Stability of Strain-softening Slopes

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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 invention discloses a slope dynamic stability evaluation method based on the Swedish slice method and simplified strain softening theory, which belongs to the technical field of geological engineering. The invention divides the vertical strips of the slope into n soil blocks, the strain of the soil blocks is used as a parameter, and the stress of the soil blocks is determined according to the simplified relationship between strain and stress, and then the stability of the slope is calculated based on the Swedish slice method . The invention considers the dynamic gradual failure process of the side slope, and determines the change of the safety factor during the failure process of the side slope according to the change of the soil block strain during the failure process. The invention has simple principle and convenient calculation, and is suitable for dynamic stability analysis of strain-softening slopes.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 陈国庆唐鹏赵聪李乐黄润秋
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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