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A Calculation Method of Critical Sliding Surface of Deep Anti-sliding Stability of Gravity Dam Foundation

A technology of anti-sliding and stable gravity dam, applied in the field of foundation soil survey, infrastructure engineering, construction, etc., can solve the problem of the difficulty of determining the fracture surface of the downstream bedrock, and the inability to determine the fracture surface of the downstream bedrock.

Active Publication Date: 2015-09-09
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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  • A Calculation Method of Critical Sliding Surface of Deep Anti-sliding Stability of Gravity Dam Foundation
  • A Calculation Method of Critical Sliding Surface of Deep Anti-sliding Stability of Gravity Dam Foundation
  • A Calculation Method of Critical Sliding Surface of Deep Anti-sliding Stability of Gravity Dam Foundation

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Embodiment 1

[0050] Embodiment 1: Calculation method of the critical failure sliding surface of double inclined sliding of the gravity dam foundation (see figure 2 ), the specific operations are as follows:

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

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

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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 a critical sliding surface of deep layer anti-sliding stability of a gravity dam foundation, and belongs to the technical field of stability analysis of a gravity dam foundation. Background technique [0002] A gravity dam is a hydraulic structure that relies on the anti-sliding force generated by its own weight to retain water. It is a common type of dam in water conservancy and hydropower projects. Gravity dams have been widely used in the water conservancy and hydropower industry due to their better safety and economy. With the development of hydropower construction and the increasing scale of construction, there are fewer and fewer gravity dam sites with complete bedrock, and most gravity dams are built on rock foundations with complex geological conditions. Stability issues are becoming increasingly promi...

Claims

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Application Information

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Patent Type & Authority Patents(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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