Analytical method for analyzing critical reservoir water level of partially submerged c '-phi' homogeneous slope

An analytical method and technology of reservoir water level, applied in the field of geotechnical engineering slope stability analysis, can solve problems such as abstract solution process, difficult to reflect and complicated stability solution, and achieve simple formula, accurate and reliable calculation result, and simple calculation formula intuitive effect

Active Publication Date: 2019-11-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0012] The limit analysis method based on the slice method requires iterative calculation. The limit analysis method based on the finite element method has the characteristics of the finite element method. The solution process is abstract and complicated, making it difficult to solve the stability solution to reflect the cause of the critical reservoir water level.

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  • Analytical method for analyzing critical reservoir water level of partially submerged c '-phi' homogeneous slope
  • Analytical method for analyzing critical reservoir water level of partially submerged c '-phi' homogeneous slope
  • Analytical method for analyzing critical reservoir water level of partially submerged c '-phi' homogeneous slope

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Embodiment Construction

[0038] The technical solution of the present invention is described in conjunction with the embodiments.

[0039] The present invention assumes the arc failure mechanism of the slope, and establishes a new single rigid body limit equilibrium model, which involves the gravity W of the slider and the water pressure V acting on the slope surface. p1 , the water pressure V acting on the horizontal surface of the slope toe p2 , the shear strength parameters c′, φ′ of the soil, the pore water pressure u in the slope, and project all the forces onto the arc sliding surface to calculate the sliding moment and resistance moment, see figure 2 .

[0040] like image 3 As shown, the complete technical solution is as follows:

[0041] Step 1: Given the assumption of a homogeneous slope arc failure mechanism, this failure mechanism is commonly used by people, and it is simpler than the logarithmic spiral failure mechanism, such as figure 2 shown.

[0042] The second step: establish a...

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Abstract

The invention provides an analytical method for water level analysis of a critical reservoir of a partially submerged homogeneous slope. A hypothetical arc destruction mechanism employs closed solutions, a slope safety coefficient explicit expression is obtained by considering the overall moment balance of a soil body between a slope surface and a sliding surface, an optimization calculation mainprogram, an objective function subprogram and a constraint function subprogram are compiled for calculation through a built-in fmincon multidimensional constraint optimization algorithm of Matlab, a critical circle center is found, and the safety coefficient is solved. The method belongs to a statically determinate problem, the obtained calculation formula is an explicit expression, the formula issimple, the reason causing the critical reservoir water level can be reflected, the influence of the water level change on the stability of the partially submerged slope can be better understood, andthe defects of other existing methods are overcome.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering slope stability analysis, in particular to an analytical method for analyzing the critical reservoir water level of a partially submerged c′-φ′ homogeneous slope. Background technique [0002] Partially submerged slopes can be considered as a case of slow water level decline, assuming that the water level in the slope is equal to the water level of the reservoir in any case and remains horizontal all the time. The partially submerged c′-φ′ homogeneous slope has a critical reservoir water level under the above-mentioned water level conditions. This phenomenon was first discovered by Lane and Griffiths (1997) through the finite element method. At this time, the slope safety factor reaches the minimum value , which means that the slope has the greatest risk of instability and damage. Subsequently, several researchers used different methods to further discuss the critical reservoir water level...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王卫登伍德.沃恩.格里菲斯卜祥航杨王致夫
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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