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A Prediction Method of Slope Stability Considering the Action of Pore Water

A prediction method and pore water technology, applied in special data processing applications, instruments, geometric CAD, etc., can solve the problems of inability to accurately calculate the minimum safety factor of the slope, the most dangerous sliding surface, poor calculation accuracy, etc., and achieve calculation efficiency and accuracy. High, convenient for engineering application, scientific and reasonable results

Active Publication Date: 2021-11-09
HOHAI UNIV
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Problems solved by technology

[0003] The present invention provides a method for predicting the stability of slopes under the action of pore water, which solves many assumptions made in the analysis of soil by using the limit analysis method in the prior art, which makes the calculation accuracy poor and the slope cannot be accurately calculated The minimum safety factor and the corresponding most dangerous sliding surface, as well as the technical issues of soil cracking position and depth range caused by pore water pressure

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  • A Prediction Method of Slope Stability Considering the Action of Pore Water
  • A Prediction Method of Slope Stability Considering the Action of Pore Water
  • A Prediction Method of Slope Stability Considering the Action of Pore Water

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Embodiment 1

[0121] The schematic diagram of the slope in this embodiment is as follows figure 1 As shown, the slope height H=10.0m, the strength parameters of the soil are: cohesion c=40KPa, internal friction angle φ=20°, soil weight γ=20.0KN / m 3 , the pore water pressure coefficient is r u =0 (i.e. do not consider the effect of pore water pressure and r u =0.3; where the slope angle is i; the sliding surface is a logarithmic helix.

[0122] Step 1. The slope surface is expressed by equation

[0123] The slope surface equation is expressed as:

[0124]

[0125] Step 2: Establish the balance equation of the slope sliding body on the sliding surface according to the equilibrium conditions, use the principle of variational method to solve the equations to obtain the distribution of normal stress and effective stress on the sliding surface, and then determine the most dangerous sliding surface and solve the safety factor of the slope f s .

[0126] Step 3: By comparing F s and the c...

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Abstract

The invention discloses a method for predicting slope stability under the action of pore water. surface shape; Step 2: Determine the soil parameters of the slope; Step 3, use the variational method to establish a slope stability analysis equation group under the action of pore water pressure, solve the equation group to obtain the stress distribution of the slope sliding surface, determine the safety factor and the maximum Dangerous sliding surface; step 4, judge the slope stability according to the critical value of the stability coefficient. The present invention provides a slope stability calculation method considering the action of pore water, which can not only calculate and obtain the minimum safety factor of the slope and the corresponding most dangerous sliding surface, but also give the soil mass caused by the action of pore water pressure. The cracking position and depth range have high calculation efficiency and accuracy, which is more suitable for engineering practice, and provides important guidance for landslide early warning and reinforcement design of actual slope engineering.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a prediction method for slope stability under the action of pore water. Background technique [0002] At present, the variational method is used in the design of various artificial slopes and reinforced retaining walls, but the variational method does not consider the impact of pore water pressure in the slope on the stability of the slope caused by rainfall or groundwater and a sudden drop in the water level of the dam. Due to the impact of the limit analysis method on the soil, many assumptions made in the analysis of the soil make the calculation accuracy poor, and the minimum safety factor of the slope and the corresponding most dangerous sliding surface cannot be accurately calculated, as well as the effect of pore water pressure. The location and depth range of soil cracking caused by cracking. Contents of the invention [0003] The present invention provides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F30/20
Inventor 张飞戴光宇陈延博高玉峰周政柯力俊王占彬
Owner HOHAI UNIV
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