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Landslide stability analysis and anti-slide pile design thrust calculation method

An analysis method and stability technology, applied in the fields of landslide stability analysis and anti-slide pile design thrust calculation, can solve problems such as the principle to be discussed, and achieve clear physical meaning, clear definition, and theoretically reliable results

Active Publication Date: 2021-12-24
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the transfer coefficient method used in China is simple and easy to implement, it is often used in the calculation of the thrust of anti-slide piles, but its principle remains to be discussed

Method used

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  • Landslide stability analysis and anti-slide pile design thrust calculation method
  • Landslide stability analysis and anti-slide pile design thrust calculation method
  • Landslide stability analysis and anti-slide pile design thrust calculation method

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Embodiment 1

[0135] use as Figure 7 The shown embodiment carries out the stability effect analysis verification of the present invention. The slope body is a homogeneous material with a broken line sliding surface. Material parameters are: bulk density γ = 20kN / m 3 , friction angle φ = 10 °, cohesion c = 25kPa. This embodiment does not consider the impact of groundwater.

[0136] When the present invention is solved, considering the action characteristics of static earth pressure, q is taken uniformly i =3. Analysis process provided by the present invention Figure 8 It can be seen that the stability coefficients obtained by the present invention are respectively: forward analysis F 0 =1.105 (satisfies the boundary condition (Z n ) F0 =0), reverse analysis F 0 =1.102 (satisfies the boundary condition (Z 0 ) F0 =0). Figure 9 The comparison between the results of the present invention and other existing analytical methods shows that the stability coefficient 1.116 obtained by t...

Embodiment 2

[0138] use Figure 10 The shown embodiment carries out the stability analysis of the present invention and the design thrust calculation verification of the anti-slide pile. The landslide develops along the sliding surface, and three different materials, I, II and III, are designed. The embodiment considers the influence of groundwater, so above the groundwater level is natural material, and below it is saturated material. The slope material parameters are as follows: ① No. I material natural 36: bulk density γ 1t =18kN / m 3 , friction angle φ 1t = 10°, cohesion c 1t =20kPa; No. I material is saturated 37: Bulk density γ 1b =22.5kN / m 3 , friction angle φ 1b =9.5°, cohesion c 1b = 18kPa. ②Natural No. II material 43: Bulk densityγ 2t =19.5kN / m 3 , friction angle φ 2t =13°, cohesion c 2t =26kPa; No. II material is saturated 39: Bulk density γ 2b =23.6kN / m 3 , friction angle φ 2b =12.5°, cohesion c 2b = 24kPa. ③No. III material is natural: bulk densityγ 3t =23.1k...

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Abstract

The invention provides a landslide stability analysis and anti-slide pile design thrust calculation method. According to the landslide stability analysis method, eight parts including a landslide section model unit, an analysis direction unit, a strip-block stress balance analysis unit, an analysis skill unit, an inter-strip force regulation unit, a strip-block moment balance analysis unit, a landslide boundary condition unit and an iteration solving unit are included. According to the invention, the method includes considering the stress balance and moment balance conditions of the bars, and reducing the number of unknown quantities by obtaining a comprehensive balance equation; solving the comprehensive balance equation under the condition of the stability coefficient F or the initial value F0 or P0 of the design thrust P of the slide-resistant pile; solving of the inter-strip force and the dip angle of the strip blocks can be realized successively by using an equation back substitution method; finally, adjusting the initial value of F0 or P0 repeatedly with the condition that the landslide boundary condition is met as the judgment basis, and obtaining stability coefficients or anti-slide pile design thrust meeting all mechanical conditions and boundary conditions through iterative calculation.

Description

technical field [0001] The invention belongs to the theoretical innovation field of geotechnical engineering, in particular to a method for analyzing the stability of landslides and calculating the design thrust of anti-slide piles. Background technique [0002] The stability analysis of landslides and the calculation of the thrust of anti-slide piles are popular research topics in the field of geotechnical engineering. This topic mainly uses the method of limit equilibrium to solve the problem. [0003] Early research focused on the arc model, which originated from the Swedish arc method proposed by Petterson. On the basis of Petterson, Fellennius proposed the Swedish slice method, which decomposes the gravity of the block along the tangential direction and the normal direction of the block base, and obtains the anti-slip moment and sliding moment around the center of the sliding arc, and the ratio of the two is defined as the stability coefficient, but this method does n...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 范志强周奇辉汪明元刘尊景叶逢春楼永良
Owner POWERCHINA HUADONG ENG COPORATION LTD