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Displacement analysis method for determining slope critical sliding surface

An analysis method and sliding surface technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of ensuring accuracy, high computational efficiency, accurate and fast search

Active Publication Date: 2016-07-27
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
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Problems solved by technology

This method has a solid foundation in mathematical mechanics, but it is only applicable to the Mohr-Coulomb criterion
[0007] None of the above methods are simple, fast and accurate effective characterization methods

Method used

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  • Displacement analysis method for determining slope critical sliding surface
  • Displacement analysis method for determining slope critical sliding surface
  • Displacement analysis method for determining slope critical sliding surface

Examples

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specific Embodiment 1

[0044] After modeling, the height of the bottom of the slope model is H=5.0, the slope ratio a:b=1:2, and the weight of the soil material is 20.0kN / m 3 , the elastic modulus is 10MPa, the Poisson's ratio is 0.25, the friction angle is 19.6°, and the bonding force is 3.0KPa. Using the strength reduction method to make the slope reach the critical state, the critical sliding surface of the slope can be obtained according to the following steps:

[0045] (1) Estimate the approximate position of the sliding surface according to the displacement nephogram, and determine the distribution area of ​​discrete points, such as image 3 shown.

[0046] (2) Arrange vertical lines at equal intervals along the horizontal direction within the search range, arrange several discrete points at equal intervals on each vertical line, and arrange several discrete points at equal intervals on each boundary line along the upper part of the slope within the search range, such as image 3 shown. In th...

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Abstract

The invention discloses a displacement analysis method for determining the slope critical sliding surface, and relates to the technical field of slope stability analysis. The method comprises the following steps of selecting a slope body to be tested, and performing modeling; enabling the slope to be in a critical state by using a strength reduction method; determining a discrete point distribution region; installing a plurality of vertical straight lines in the discrete point distribution region, wherein a plurality of discrete points are distributed on each vertical straight line from head to tail, and a plurality of discrete points are also distributed in a straight line of the upper boundary of the discrete point distribution region; calculating the displacement change rate of the midpoint of a connecting line of any two adjacent discrete points on each straight line of the boundary and on the vertical lines; respectively finding out the position of the maximum displacement change rate on the straight line of the boundary and on the vertical lines; and performing smoothening processing on a connecting line of the position of the sliding surface and the position of an inlet and outlet opening of the sliding surface. The method has the advantages that the requirements of high accuracy of the judged sliding surface, wide application range, precise theory and simple method are ensured; the artificial and experiential defects are avoided; and great engineering practice significance is realized.

Description

technical field [0001] The invention relates to the technical field of slope stability analysis. Background technique [0002] my country is one of the countries most severely affected by natural disasters in the world. Relevant studies have shown that the impact of global warming on the distribution and occurrence of disaster risks in my country will be comprehensive and multi-layered. Strong typhoons will become more active, rainstorm and flood disasters will increase, the possibility of basin-wide floods will increase, and strong earthquakes will increase. Landslides, mountain torrents, mudslides and other geological disasters caused by local heavy rainfall will also increase, and the demand for slope management will also increase accordingly, and the requirements will be more precise and strict. [0003] At present, for the determination of the slope sliding surface, there are mainly the following three methods to characterize the critical sliding surface by the strength...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 袁维胡叶江胡小莉马斌
Owner SHIJIAZHUANG TIEDAO UNIV
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