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Risk decision method for water retaining standard of non-overflow earth-rock cofferdam

A risk decision-making and cofferdam technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as ignoring the randomness of decision-making indicators

Inactive Publication Date: 2015-05-20
POWERCHINA CHENGDU ENG
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to propose a risk decision-making method for the water-retaining standard of the soil-rock cofferdam, and to solve the problems caused by the neglect of the randomness of the decision-making index in the traditional decision-making method

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  • Risk decision method for water retaining standard of non-overflow earth-rock cofferdam
  • Risk decision method for water retaining standard of non-overflow earth-rock cofferdam
  • Risk decision method for water retaining standard of non-overflow earth-rock cofferdam

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Embodiment approach

[0090] A large hydropower project in the southwest is an important hydropower station on the main stream of the river basin. The concrete double-curvature arch dam is 278m high. In the initial stage of construction, the diversion plan is to block the annual water-retaining tunnel once. According to the "Hydropower Project Grade Classification and Design Safety Standards" and "Flood Control Standards", the pivotal project is a first-class project with a huge scale of construction. The collapse of the cofferdam will have a significant impact on the construction of the project, so the level of the diversion building is selected It is grade III. For Class III diversion buildings, the corresponding design flood standard for earth-rock type cofferdams is a return period of 20-50 years. The cost of construction diversion is high, and the impact and difficulty are large. The selection of the initial diversion standard is difficult, and the decision of the initial diversion standard sc...

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Abstract

The invention belongs to the technical field of diversion risk decision for water conservancy and hydropower engineering construction, discloses a risk decision method for water retaining standard of a non-overflow earth-rock cofferdam and solves the problems caused by ignorance of decision index randomness in traditional decision methods. The method includes a, constructing a decision index system for the water retaining standard of the non-overflow earth-rock cofferdam; b, calculating dynamic water retaining risks of the non-overflow earth-rock cofferdam; c, estimating a decision index interval number by introducing an amplitude variation coefficient; d, calculating subjective entropy weight of an interval number index on the basis of an information entropy, and calculating comprehensive weight of the decision index according to the subjective weight; e, ranking schemes to decide a final one on the basis of the principle of interval number probability. The method is suitable for diversion risk decision for water conservancy and hydropower engineering construction.

Description

Technical field [0001] The invention belongs to the technical field of construction diversion risk decision-making for water conservancy and hydropower projects, and specifically relates to a risk decision-making method that does not meet the water-retaining standards of a soil-rock cofferdam. Background technique [0002] Construction diversion affects the overall construction of hydropower projects, and the project cost accounts for a significant proportion, generally 5% to 20% of the total cost of the hydropower project. It is a risky project. However, if the water-soil cofferdam has a flooding event, it is bound to collapse. Bring huge losses to the project. Therefore, however, the risky decision-making of the water-retaining standards of water-soil-soil-rock cofferdams has become a key issue in the planning, construction, investment, decision-making and management of water conservancy and hydropower projects. In recent years, some engineering experts and scholars have carri...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张超
Owner POWERCHINA CHENGDU ENG