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Landslide stability evaluation method based on transfer coefficient method and surface displacement

A technology of surface displacement and transfer coefficient, which is applied in the direction of applying stable shear force to test material strength, strength properties, material inspection products, etc. Stability is difficult to establish a connection and other issues

Active Publication Date: 2018-09-18
康原(江苏)科技有限公司
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Problems solved by technology

Among them, the limit equilibrium method does not consider the stress-strain relationship of the sliding surface, and can only provide an overall stability coefficient, which cannot reflect the deformation state of the slope.
Although the finite element strength reduction method considers the stress-strain relationship and can obtain the deformation state and landslide stability coefficient under different reduction conditions, reducing the shear strength at the same time not only cannot fully explain the weakening mechanism of the shear strength, but also after reduction The actual stress state has changed and cannot describe the actual deformation of the landslide
In actual engineering, it is difficult to establish a connection between the landslide monitoring data and the stability of the landslide, which makes it difficult to evaluate the stability of the landslide in real time based on the real-time monitoring data of the landslide.

Method used

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  • Landslide stability evaluation method based on transfer coefficient method and surface displacement
  • Landslide stability evaluation method based on transfer coefficient method and surface displacement
  • Landslide stability evaluation method based on transfer coefficient method and surface displacement

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Embodiment 1

[0039] See figure 1 This embodiment discloses a landslide stability evaluation method based on the transfer coefficient method and surface displacement, including the following steps:

[0040] 1) See figure 2 , Divide the landslide to be evaluated into n vertical sliders, and mark them as 1, 2, ..., i, ..., n from top to bottom.

[0041] See image 3 , For any slider i, without considering external effects,

[0042] The force balance relation of the normal direction of the slider i is:

[0043] N i =W i cosα i +P i-1 sin(α i-1 -α i ) (1)

[0044] The total sliding force of slider i is:

[0045] T i =W i sinα i +P i-1 cos(α i-1 -α i ) (2)

[0046] The sliding resistance of slider i is:

[0047]

[0048] Where N i Is the positive pressure of the slider, kN; α i Is the angle between the i-th slider and the horizontal plane, °; W i Is the gravity of the slider, kN; B i Is the width of the slider, m; P i-1 Is the remaining thrust of the i-th slider received by the previous slider, that is, th...

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Abstract

The invention provides a landslide stability evaluation method based on a transfer coefficient method and surface displacement. The method comprises the steps of dividing a landslide to be evaluated into n vertical sliders, determining the stress state of each slider, calculating the shear displacement of a sliding band at the bottom of each slider, and calculating the stability coefficient of thelandslide according to the shear displacement of the sliding band. Based on the transfer coefficient method and the measured surface displacement data of the landslide, the relationship between the surface displacement of the landslide and the stability of the landslide is established. The stability of the landslide can be evaluated by the displacement data, and the real-time monitoring of the landslide can be better served.

Description

Technical field [0001] The invention relates to a slope engineering stability evaluation technology, in particular to a landslide stability evaluation method. Background technique [0002] Landslide early warning is the core issue of landslide research, and it is also one of the technical problems that geotechnical engineering cares about. It provides quantitative indicators for selecting reasonable reinforcement treatment plans for landslides. [0003] In engineering, the calculation of landslide stability and landslide deformation are usually analyzed independently, and the calculation of landslide stability usually adopts the limit equilibrium method or the finite element strength reduction method. Among them, the limit equilibrium method does not consider the stress-strain relationship of the sliding surface, and can only provide an overall stability coefficient, which cannot reflect the deformation state of the slope. Although the finite element strength reduction method cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N33/24
CPCG01N3/24G01N33/24G01N2203/0025
Inventor 王俊杰黄诗渊李玉桥袁智洪张慧萍赵天龙
Owner 康原(江苏)科技有限公司
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