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Method of calculating deep antiskid stable critical slipping plane of dam foundation of gravity dam

A technology of anti-sliding stability and calculation method, which is applied in the field of foundation soil survey, foundation structure engineering, construction, etc., can solve the problems that the fracture surface of the downstream bedrock is difficult to determine, and the fracture surface of the downstream bedrock cannot be determined.

Active Publication Date: 2013-12-25
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

For the first type of situation, the safety factor of anti-sliding stability can be directly calculated by applying the equal safety factor method; but for the second type of situation, it is generally difficult to determine the fracture surface of the downstream bedrock, and the current design method generally assumes a downstream The fracture surface of the bedrock, and then carry out the anti-sliding stability analysis, however, this method cannot determine the most unfavorable fracture surface of the downstream bedrock

Method used

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  • Method of calculating deep antiskid stable critical slipping plane of dam foundation of gravity dam
  • Method of calculating deep antiskid stable critical slipping plane of dam foundation of gravity dam
  • Method of calculating deep antiskid stable critical slipping plane of dam foundation of gravity dam

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Embodiment 1

[0050] Example 1: The calculation method of the critical failure sliding surface of the gravity dam foundation double oblique sliding (see figure 2 ), the specific operations are as follows:

[0051] 1. Draw up relevant parameters for deep anti-sliding stability calculation of gravity dam foundation

[0052] This embodiment is as image 3 The gravity dam shown has a dam height of 50.0 m, a dam crest width of 5.0 m, a dam bottom width of 40 m, and a downstream slope of 1:0.778. The upstream normal water level is 47.0 m, and the downstream water level is 0.0 m. ADC is For the foundation surface, AB is a gently inclined weak structural surface with an inclination angle of 16.7°, and BC is the slip surface where the downstream bedrock shear occurs; the coordinates of the three points A, B, and D are: A(0,0), B (50, -15), D (50, 0), coordinate of point C Is a undetermined unknown quantity; since the foundation surface is a horizontal plane and point C must be located to the right of ...

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Abstract

The invention discloses a method of calculating a deep antiskid stable critical slipping plane of a dam foundation of a gravity dam and belongs to the field of stability analysis for gravity dams. Aiming at the condition that slip possibly occurs because the low-gradient weak structural plane of the dam foundation of the gravity dam is not exposed but part of downstream bedrock is possibly subjected to clipping, the method comprises the following steps: establishing a nonlinear mathematic programming model of deep antiskid stability analysis for the gravity dam by taking variable of locations subjected to clipping and slipping plane damage on the downstream bedrock as an optimization variable, the deep antiskid stability factor of the gravity dam as an objective function and an equal safety factor normal equation as a constraint condition; solving out a worst critical slipping plane subjected to clipping damage on the downstream rock mass and a safety factor minimal value corresponding to the worst critical slipping plane. The method disclosed by the invention has the characteristics of definite concept, high calculation precision and the like, and can be applied to deep antiskid stability analysis for the gravity dam.

Description

Technical field [0001] The invention relates to a calculation method for the stability analysis of a gravity dam foundation, in particular to a calculation method for the deep anti-sliding stability critical slip surface of a gravity dam foundation, and belongs to the technical field of gravity dam foundation stability analysis. Background technique [0002] A gravity dam is a hydraulic structure that relies on the anti-sliding force generated by its own weight to block water. It is a common dam type in water conservancy and hydropower projects. Because gravity dams have better safety and economy, they have been widely used in water conservancy and hydropower industries. With the development of hydropower construction and the increasing scale of construction, there are fewer and fewer gravity dam sites with complete bedrock. Most gravity dams are built on rock foundations with complex geological conditions. Therefore, the complex dam foundations of gravity dams are resistant to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/08
Inventor 李泽魏久坤姚激武亮
Owner KUNMING UNIV OF SCI & TECH
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